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Path check

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370 - Multiplex communications

370241000 - DIAGNOSTIC TESTING (OTHER THAN SYNCHRONIZATION)

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DocumentTitleDate
20090161563REDUNDANCY METHOD AND SWITCH APPARATUS - A redundancy method in which a network is made redundant with a working path and a protection path. The method includes transmitting a working system supervising frame and a protection system supervising frame from a switch apparatus on transmission side to the working path and the protection path; passing, by a switch apparatus on reception side, the working system supervising frame received from the working path as well as abolishing the protection system supervising frame and passing the protection system supervising frame received from the protection path as well as abolishing the working system supervising frame; and performing a connectivity check for the working path and the protection path by using the passed working system supervising frame and the passed protection system supervising frame.06-25-2009
20110182190METHOD AND SYSTEM FOR SELF-TERMINATING A MEDIA SERVICE DUE TO AN OUT-OF-COVERAGE CONDITION - A method and mobile device that self-terminates a media service if an out-of-coverage condition is detected. The media service operates on top of a connectionless peer-to-peer packet-based transport protocol. The out-of-coverage condition may relate to the mobile device itself or to a remote mobile device engaged in the media service. The loss of coverage by the remote mobile device may be detected by observing whether the remote mobile device has failed to send any data packets for more than a predetermined period of time. If an out-of-coverage situation is detected, then the method or device initiates service cancellation or release.07-28-2011
20090073887SYSTEM FOR TESTING ETHERNET PATHS AND LINKS WITHOUT IMPACTING NON-TEST TRAFFIC - A system for testing Ethernet paths or links without adversely impacting non-test traffic. The system includes a test traffic generator that includes a scheduler that determines when a new test packet is generated. The test traffic generator includes a packet creator that builds a test packet and a transmitter for transmitting the test packet via the Ethernet path or link. The packet creator sends the test packet to the transmitter. The traffic generator includes a transmit credit block coupled to the transmitter or to the scheduler. The transmit credit block stores an amount of credits representing a number of bytes that are available to transmit and decrements the amount each time a non-test packet is communicated via the Ethernet path or link.03-19-2009
20100054138DISCOVERY PROTOCOL - A method and device may comprise transmitting, via a transmitter, a plurality of transmit pings at a transmit interval. A receiver may listen, for a live ping and the receiver may be configured to be turned on at a beginning of the assess interval, and off at an end of the detect duration. The receiver may further receive the live ping. After receiving the live ping, transmission of a new ping may be delayed for a delay duration. The new pings may be transmitted at the transmit interval.03-04-2010
20110194421System and Method of Controlling In-Bound Path Selection Based on Historical and Continuous Path Quality Monitoring, Assessment and Predictions - A system and method of automatically controlling in-bound traffic from a first communications peer to a second communications peer based on an input from a historical path quality assessment and prediction system is disclosed. The second communications peer receives an input from the historical path quality assessment and prediction system, selects a path through a relay based on the received input, requests allocation of the relay, and sends an address of the selected relay to the first communications peer. The system and method works in concert with an Interactive Connectivity Establishment (ICE) mechanism, or takes advantage of the features of the Interactive Connectivity Establishment (ICE) mechanism.08-11-2011
20100118712Systems and Methods for Notifying Users of a Network Resource Outage - Systems and methods are disclosed for a network switch that periodically determines whether there are connectivity problems with first ports and a second port independently of responding to requests from computer systems. Information to be sent to the computer system that sends a request is generated. The information includes an error message regarding at least one of the connectivity problems when one of the first ports or the second port with the connectivity problem is required to respond to the request.05-13-2010
20100118711Tools that facilitate diagnostics for mobile backhaul networks - A diagnostic tool is provided for calculating the availability of multi-segment pseudowires within an internet protocol (IP)-based mobile backhaul network. A control message is transmitted from an originating node towards a destination node within the IP-based mobile backhaul network over a primary multi-segment pseudowire and a secondary multi-segment pseudowire. From the response messages received from intermediate nodes positioned between the network node and the destination node along the primary multi-segment pseudowire and the secondary multi-segment psuedowire, the originating node determines the identities of each of the intermediate nodes, and calculates a respective individual availability of the primary multi-segment pseudowire and the secondary multi-segment pseudowire.05-13-2010
20100074121WIRELESS DEVICE AND METHOD OF CONTROLLING AND MONITORING WIRELESS DEVICE - A wireless device connected to a plurality of wireless control devices connecting with a monitoring device, and controlled and monitored by the monitoring device via the wireless control device, the wireless device includes a transmitting and receiving unit transmitting and receiving a signal to and from the wireless control device. The wireless device includes a selecting unit selecting, from within the plurality of wireless control devices, the one wireless control device which transmits and receives a control and monitor signal, contained in the signal, by which the monitoring device controls and monitors a self-device.03-25-2010
20130033993Distributed Overlay Network Data Traffic Management by a Virtual Server - An approach is provided in which a data traffic module executing on a network interface card receives a data packet initiated by a first virtual machine with a destination at a second virtual machine. The data traffic module identifies one or more physical path translations corresponding to a logical connectivity that is independent of physical topology constraints of a physical network. In turn, the data traffic module encapsulates the data packet with the one or more physical path translations and sends the encapsulated data packet to the second virtual machine over the physical network.02-07-2013
20100110904IDENTIFYING IMPROPER CABLING OF DEVICES - A system and method are disclosed for identifying an improper cabling of control system devices connected to redundant communication networks of a distributed control system, such as a substation automation system. As proposed in the standard IEC 62439 (Parallel Redundancy Protocol PRP), messages including a sender identification or source address as well as network or associated device port identification can be transmitted from a sending device to a receiving device over redundant networks. The receiving or destination device can determine a connect status indicating whether or not a message has been received on a particular device port, as well as an error event indicating whether or not the device port is associated to the network identified in the received message. By doing so for at least two distinct sending devices, an improper communication path between two devices can be diagnosed and an indication can be produced as to the location and/or type of wrong cabling. Single error events can be supplanted by error rates calculated as a probability of receiving messages on a device port not associated to the network identified in the received message and compared to error thresholds for the purpose of identifying improper cabling.05-06-2010
20090154365Method And System For Simplex Or Duplex Transmission Mode Of An Ethernet Link In An Energy Efficient Network - Ethernet link partners within an Ethernet network, coupled via an Ethernet link comprising one or more channels may be configured to operate in simplex mode based on determined condition(s) during communications via the one or more channels. The determined condition(s) may comprise utilization or load, current/past conditions and/or link statistics that may comprise one or more of packet error rate (PER), bit error rate (BER), and/or signal to noise ration (SNR). In addition, one or more of the channels may be transitioned to a lower power mode with a zero data rate. In some embodiments of the invention, one or more of a plurality of operational changes may occur during simplex mode operation. For example, power may lowered for one or more components that enable communication such as receivers, transmitters, near-end cross talk cancellers, far-end cross talk cancellers and/or echo cancellers.06-18-2009
20120182882SYSTEMS AND METHODS FOR SOCIAL GRAPH DATA ANALYTICS TO DETERMINE CONNECTIVITY WITHIN A COMMUNITY - Systems and methods for social graph data analytics to determine the connectivity between nodes within a community are provided. A user may assign user connectivity values to other members of the community, or connectivity values may be automatically harvested or assigned from third parties or based on the frequency of interactions between members of the community. Connectivity values may represent such factors as alignment, reputation, status, and/or influence within a social graph of a network community, or the degree of trust. The paths connecting a first node to a second node may be retrieved, and social graph data analytics may be performed on the retrieved paths. For example, a network connectivity value may be determined from all or a subset of all of the retrieved paths. A parallel computational framework may operate in connection with a key-value store to perform some or all of the computations related to the connectivity determinations. Network connectivity values and/or other social graph data may be outputted to third-party processes and services for use in initiating automatic transactions or making automated network-based or real-world decisions.07-19-2012
20110002227MULTIUSER SCHEDULING IN WLAN SYSTEMS - An apparatus for wireless communications is provided including a processing system. The processing system is configured to determine path-losses between the apparatus and a plurality of wireless nodes, to group the plurality of wireless nodes into sets based on the determined path-losses, and to exchange data with at least one of the wireless nodes in one of the sets.01-06-2011
20100271960TRACING ROUTES AND PROTOCOLS - A computer-readable medium may include computer-executable instructions. The computer-executable instructions including instructions for receiving a request to trace a route, in a network, from a source device to a target device and to identify protocols that are associated with the route, sending at least one test packet toward the target device, receiving at least one reply packet from the network, examining payload of the reply packet to determine the route and to identify the protocols, and outputting description of the route and identities of the protocols.10-28-2010
20120224495IN-SERVICE THROUGHPUT TESTING IN DISTRIBUTED ROUTER/SWITCH ARCHITECTURES - Various embodiments relate to a system and related method of measuring at least one transport link's performance in a communications network. An originating device controlled by a customer may generate testing frames that are transported to a receiving device also controlled by the customer through the at least one transport link that connects the two devices. In some embodiments, the transport links may transfer the testing frames while the transport links are transporting other data traffic. The receiving device may parse incoming frames and, upon identifying the testing frames, may generate echoing response frames. In some embodiments, the echoing response frames may be placed in one of a series of priority-based service queues. The originating device may then receive the response frames through the transport links and may measure the stream of incoming frames to measure and analyze the transport links' performance.09-06-2012
20090232011METHOD, APPARATUS, AND SYSTEM FOR DIAGNOSING ROUTE IN NETWORK BASED ON DIAMETER PROTOCOL - A method, system, and apparatus for diagnosing a route in a network based on a Diameter protocol are provided. The method includes the following steps. A source Diameter node generates a diagnosis message and sends it. An intermediate Diameter node adds diagnosis information thereof to the diagnosis message after receiving it and forwards it until the diagnosis message is forwarded to a Diameter server capable of processing the diagnosis message or a Diameter node incapable of forwarding the diagnosis message. The Diameter server or the Diameter node generates a response message and sends it carrying diagnosis information thereof, information in the diagnosis message, and a response type. The intermediate Diameter node adds the diagnosis information thereof to the response message after receiving it, and forwards it until the response message is forwarded to the source Diameter node. The source Diameter node parses the response message to obtain route related information.09-17-2009
20090232010METHOD AND APPARATUS OF CONNECTIVITY RECOVERY IN A WIRELESS NETWORK - A wireless communication device and a method of operating an antenna training process to discover first and second communication paths between at least two stations, to rank according to a quality criterion transmitting and receiving modes of an antenna, to report best transmitting mode and best receiving mode for transmitting and receiving signals over said first and second communication paths and to establish a communication link on a selected communication path based on the quality of the transmitting mode and said receiving mode.09-17-2009
20090232009Internet Connectivity Verification - Verification of Internet connectivity using multiple prior connection attempts to Internet destination(s). The Internet destinations may be destinations that have high reliability and that do not easily have intermediating systems that might deny a connection request. Such an Internet destination might be, for example, root Domain Name Server (DNS) servers. Connection attempt results are obtained by for at least some of the connection attempts, tracking which resulted in success and failure. Internet connectivity is then verified based on the collective results, rather than relying on any one single connection attempt. In one embodiment, the frequency of the connection attempts may depend on a current state of the Internet connection.09-17-2009
20090323539RELIABILITY ESTIMATION METHODS FOR LARGE NETWORKED SYSTEMS - A computer-based method for determining a probability that no path exists from a specified starting node to a specified target node within a network of nodes and directional links between pairs of nodes is described. The nodes and directional links form paths of a reliability graph and the method is performed using a computer coupled to a database that includes data relating to the nodes and the directional links. The method includes selecting a set of paths, from the set of all paths, between the starting node and the target node that have been determined to be reliable, calculating a reliability of the union of the selected path sets, setting an upper bound for the unreliability of the set of all paths, based on the calculated reliability, selecting a set of minimal cutsets from all such cutsets that lie between the starting node and the target node, calculating the probability of the union of the minimal cutsets, and setting a lower bound for the unreliability of the set of all cutsets.12-31-2009
20120113818POWER HEADROOM REPORT METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A Power Headroom Report (PHR) method and apparatus for a mobile communication system supporting carrier aggregation are provided. The method for transmitting PHR of a terminal in a mobile communication system includes configuring, when a PHR is triggered for at least one activated serving cell, an extended PHR for the at least one activated serving cell, the PHR being triggered when a change of a downlink path loss in the at least one activated serving cell is greater than a predetermined threshold value, and transmitting the extended PHR.05-10-2012
20120113817Multicast Network Diagnostics - A Shortest Path Bridging (SPB) network provides a multicast traceroute using network identifiers such as IP addresses for the source and destination (multicast group). The network identifiers, which are based on layer 3 (IP) designations of the traced multicast group, are mapped to a network identifier of the multicast group (corresponding to a layer 2, or MAC address) and an associated Virtual Local Area Network (VLAN) which is used to transport the packets belonging to the multicast flow. Therefore, an operator issuing the traceroute command need not be familiar with the layer 2 concepts of the network, but rather need only supply the layer 3 (IP address) designations of the concerned entities.05-10-2012
20130163441DECOUPLED DOWNLINK AND UPLINK - The present disclosure provides systems and methods for decoupling downlinks and uplinks between user equipment (UE) and base stations. Briefly described, in architecture, one embodiment of the system comprises UE (e.g., cellular telephones, mobile devices, etc.) for independently establishing an uplink (UL) and a downlink (DL). One embodiment of the method comprises the steps of establishing a DL to an optimal DL base station (BS), and establishing an UL to an optimal UL BS.06-27-2013
20120236732SUPPORTING NON-DELIVERY NOTIFICATION BETWEEN A SWITCH AND DEVICE IN A NETWORK - Provided are a computer program product, system, and method for supporting non-delivery notification between a switch and device in a network. A login with a switch is initiated including a test service parameter requesting a non-delivery notification service to cause the switch to return a non-delivery notification in response to a test path request indicating a destination node that is unavailable. Indication is made that the test service is available for the login in response to receiving a reply from the switch that the switch accepts the login with the non-delivery notification service. The test path request is sent to the switch to determine whether the destination node is available. The non-delivery notification is received from the switch in response to the switch determining that the destination node to which the test path request is directed is unavailable.09-20-2012
20120236731System and Method for Co-Channel Interference Measurement and Managed Adaptive Resource Allocation for Wireless Backhaul - A system, method, and software are provided for measuring co-channel interference in a wireless network with particular application for management of resource allocation for Non Line of Sight (NLOS) wireless backhaul in MicroCell and PicoCell networks. Given the difficulty of predicting the mutual interference between multiple links, DownLink and UpLink co-channel interference are characterized between each Hub and each Remote Backhaul Module Unit periodically during active service. Beneficially, the co-channel interference metrics are used as the basis for intelligently and adaptively managing network resources to substantially reduce interference and increase the aggregate data capacity of the network e.g. by grouping of interfering and/or non-interfering links, and managing resource block allocations accordingly, i.e. assigning common resource blocks preferentially to weakly interfering links or groups of links and allocating different resource blocks or orthogonal channels to strongly interfering links or groups of links.09-20-2012
20080298260OPERATIONAL STATUS TESTING APPARATUS AND METHOD FOR ETHERNET-BASED AUTOMATIC PROTECTION SWITCHING PROCESS - Provided is an operational status testing apparatus and method for an Ethernet-based APS process. A test command signal which contains a command to perform an operational test for the APS process of a first node and a second test response signal that indicates that the operation of the APS process of a second node is performed normally, from among far end request signals that are received from the second node connected to own first node via an Ethernet network, are filtered. When the far end request signals are test command signals, a first test response signal that indicates that the operation of the APS process of the first node is performed normally is generated, and a top priority local request signal is selected based on priorities of the first test response signal and at least one local request signal that indicates the status of the APS process of the first node, and an output signal to be transmitted to the second node is determined based on priorities of the top priority local request signal and the filtered the far end request signal. The function for testing the operational status for the APS process defined in ITU-T recommendation G.8031 is embodied, and when an operational status test request is received from another node, the APS process can be tested effectively without having to perform a complicated diagnosis operation for the APS process.12-04-2008
20110286339COMMUNICATION DEVICE, METHOD, INTEGRATED CIRCUIT, SYSTEM, AND PROGRAM - The present communication device includes a transmission path state determination unit; a topology determination unit configured to classify a destination device into a first group when detected transmission path characteristic satisfies criteria, and to classify a destination device into a second group when the detected transmission path characteristic does not satisfy the criteria; and a frequency band control unit configured to select a first frequency band and a second frequency band higher than the first frequency band based on whether the destination device is classified into the first group, or into the second group, the first and second frequency bands being obtained by dividing an entire frequency band; and a communication unit.11-24-2011
20110299406PATH DETECTION IN TRILL NETWORKS - One embodiment of the present invention provides a system for detecting a path between two nodes. During operation, the system transmits a network-testing request frame, which includes a time-to-live (TTL) field within a Transparent Interconnection of Lots of Links (TRILL) header, from a source node to a destination node. In response to receiving a network-testing response frame sent from an intermediate node, the system increments the TTL value by 1 and re-transmits the network-testing frame to the destination node. In response to receiving a network-testing response frame sent from the destination node, the system determines a path between the source node and the destination node. The network-testing request or response frames is not processed on an Internet Protocol (IP) layer.12-08-2011
20120099443PATH DIAGNOSIS IN COMMUNICATION NETWORKS - One embodiment of the present invention provides a system for mapping all possible paths between a source node and a destination node. During operation, the system receives a management frame, determines all possible next-hop nodes based on a destination address carried in the payload of the management frame. The system then selects one of the next-hop nodes, and modifies payload of the received management frame to include information associated with the next-hop nodes and the selected next-hop node. The system then forwards the modified data frame to the selected next-hop node.04-26-2012
20110299407BASE STATION APPARATUS, TERMINAL DEVICE, AND RANK SETTING METHOD - A base station apparatus, in a wireless communication system supporting band aggregation, able to limit drops in throughput while lowering the amount of control information for the rank of an added band; and a terminal device and rank setting method of the same. An added band rank setting unit (12-08-2011
20110292814COMMUNICATION PATH MONITORING METHOD AND TRANSMISSION APPARATUS - A first transmission apparatus and a second transmission apparatus recognize the working path and the back-up path group from communication paths between the two apparatuses. The first transmission apparatus selects a measurement path from the back-up path group and transmits a test signal via the measurement path to the second transmission apparatus. The second transmission apparatus uses the test signal to measure communication quality, records the measurement data, and transmits a test signal including the measurement data via the measurement path to the first transmission apparatus. The first transmission apparatus records the measurement data included in the test signal from the second transmission apparatus, uses the test signal to measure communication quality, and records that measurement data. The first transmission apparatus selects a new measurement path from the back-up path group and transmits a test signal including that measurement data via the new measurement path to the second transmission apparatus.12-01-2011
20090103442Communicating risk information within a multi-domain network - A method for communicating risk information within a network including a plurality of domains connected to one another at the border nodes of said domains, characterized by steps consisting of: 04-23-2009
20080310315Equalized trigger - A data acquisition apparatus and method are provided. The apparatus comprises a receiver for receiving an analog data signal, an equalizer for equalizing the received analog data signal. A trigger element is provided for generating a trigger signal in accordance with the equalized analog data signal. A memory element stores a digitized version of the received analog data signal digitized by an analog to digital converter in accordance with the generated trigger signal.12-18-2008
20100238811METHOD AND ARRANGEMENT FOR ASSURING PREFIX CONSISTENCY AMONG MULTIPLE MOBILE ROUTERS - The present invention relates to a method and an arrangement in communication systems utilising network mobility (NEMO). In moving networks comprising a plurality of mobile routers, MRs, it needs to be assured that two or more MRs sharing the same prefix, belong to the same moving network. The method according to the invention utilises a local connectivity test to determine if a MR should be allowed a certain prefix. Unique shared secrets are agreed between the MRs and the home agent, HA. The MRs derive, based on their respective shared secrets, MR specific information, which are distributed among MRs in the moving network. A MR requesting a prefix from the HA, forwards the MR specific information to the HA. By comparing data generated using its stored shared secrets with data from the MR specific information, the HA can determine whether the MR requesting a certain prefix belongs to the same moving network as MRs already using that prefix.09-23-2010
20090168657System and Method for Validating Packet Classification - A system and method for validating packet classification within an input/output device or component. Based on a target DMA engine within the device, and a protocol path for testing the DMA engine, sets of packet attributes are generated and used to format packets for input to the device. The output of the device is examined to determine if the correct DMA engine was used within the device. The DMA policy specifying which DMA engine to use for a particular packet configuration or set of protocol attributes can be dynamically replaced or modified without halting the validation process.07-02-2009
20090274055Method for Determining a Route in a Network and a Quality-Related Parameter for Said Route - A routing method for a network burdens the network with less routing messages. According to said method, routing hellos for calculating the link metrics are used. The method thus removes the need for metric beacons.11-05-2009
20090274056Method of Identifying at Least One Route Satisfying at Least One Constraint Between a Source Node and a Destination Node in a Telecommunications Network11-05-2009
20120106361System And Method For Detecting And Isolating A Remote Loop - A system and method are provided for enabling a first network to detect a loop in a second network connected thereto. The first network runs a first instance of a Spanning Tree Protocol and the second network runs either a different instance or no instance. The method includes sending a Remote Loop Detection Packet (“RLDP”) from the ports in bridges of the first network which are connected to the second network. The RLDP includes identifiers such as the source bridge, port and VLAN. The system and method further includes checking for receipt of the RLDP on the same bridge which sent the RLDP. If such a receipt occurs, a loop is detected and one of the ports of the receiving/sending bridge is blocked.05-03-2012
20100265831PACKET FORWARDING DEVICE AND CONTROL CIRCUIT THEREOF - A packet forwarding device includes a storage that stores a path selection table in which link numbers of a Work path and a Protection path for each flow number of a transfer packet, a flag that indicates whether the link is made up of a plurality of physical lines, a link aggregation number that identifies an aggregation of the plurality of physical lines, and destination information are set in association with one another, a link status table, a node status table, and an LAG status table, and a path selection processor that selects a path that outputs the packet on the basis of the information.10-21-2010
20090262652METHOD OF EVALUATING THE RELIABILITY OF A ROUTE IN A COOPERATIVE NETWORK - The invention relates to a method of evaluating the reliability of a route in a cooperative network for transmitting packets of data between a source node and a destination node of the network. It includes, on reception by the destination node of a message indicating a route between the two nodes: 10-22-2009
20080212484Tracing connection paths through transparent proxies - In one embodiment, a method for tracing a connection path from a source node to a destination node through a network having one or more transparent proxies includes generating a trace packet at the source node, transmitting the trace packet over the network towards the destination node, and receiving trace response packets in response to transmission of the trace packet. The trace response packets include a packet from the destination node and a packet from each of the transparent proxies in a data path from the source node to the destination node. Each of the packets from the transparent proxies includes an identifier of the transparent proxy transmitting the packet. The method further includes identifying the transparent proxies in the connection path based on information in the trace response packets. An apparatus for tracing a connection path is also disclosed.09-04-2008
20100061252Reducing CC Message Transmission in a Provider Network - A method and apparatus for reducing the number of CC messages transmitted in a provider network. In one embodiment of the invention, a first service provider network element receives CC messages from a first customer network at a first periodicity rate. The first service provider network element stores the received CC messages and reduces the first periodicity rate to create a second periodicity rate that is smaller than the first periodicity rate. The first service provider network element transmits CC messages to a second service provider network element through the provider network at the second periodicity rate. Other methods and apparatus are also described.03-11-2010
20100284284VOICE OVER INTERNET PROTOCOL (VoIP) ACCESS TERMINAL - An access terminal includes a processing system configured to determine whether a voice over internet protocol (VoIP) communication channel is available. The processing system is also configured, upon entry into a VoIP-enabled communication environment, to provide without manual intervention a first request for one or more VoIP network connection resources to initiate communication between the access terminal and a packet data gateway over a VoIP communication channel. A method and a processing system are also provided for initiating a VoIP service.11-11-2010
20100097943METHOD AND APPARATUS FOR PERFORMING REACHABILITY TESTING WITHIN THE CONTEXT OF CUSTOMER VIRTUAL PRIVATE NETWORKS - In one embodiment, the invention comprises a method and apparatus for verifying connectivity in a network comprising a plurality of provider edge routers and a plurality of customer edge routers facilitating communication within at least one customer virtual private network. In another embodiment, the invention comprises a method for determining respective operational statuses of edge communication links between provider edge routers and customer edge routers. In another embodiment, the invention comprises a method for verifying site-to-site reachability within the context of customer virtual private networks.04-22-2010
20080279110Method and system for verifying connectivity of multi-segment pseudo-wires - A method for testing connectivity of a multi-segment pseudo-wire (“MS-PW”) in a network, the method comprising: sending an echo request message from a first provider edge (“PE”) device to a second provider edge (“PE”) device for a section of the multi-segment pseudo-wire (“MS-PW”) between the first provider edge (“PE”) device and the second provider edge (“PE”) device; the echo request message being identified as such by a control word contained therein; an inner label of the echo request message having a time-to-live (“TTL”) value set to a number of segments in the section; the time-to-live (“TTL”) value for determining whether the control word is to be inspected as it traverses the section; upon the echo request message arriving at the second provider edge (“PE”) device, the second provider edge (“PE”) device recognizing the echo request message as such by inspecting the control word contained therein; and, receiving an echo reply message from the second provider edge (“PE”) device in response to the echo request message, the echo reply message confirming connectivity of the section.11-13-2008
20080285470Determining An Active/Standby State From Service Readiness - Determining an active/standby state of one or more modules of a network element includes provisioning a path through the modules, where the path is for providing a service. A signal is introduced into the path, and the path is monitored. The service is established to be ready in accordance with the monitoring. The modules are determined to be in an active state in response to establishing that the service is ready.11-20-2008
20080291839Method and system for maintaining high reliability logical connection - A method and system for maintaining a high reliability logical connection between hosts employs adaptive transparent pinging, clone blocking and bandwidth leveling to realize improvements in the areas of connection status verification, security and bandwidth management. In adaptive transparent pinging, a ping interval that defines a frequency at which ping messages are transmitted from an initiating host to a receiving host to check connection status is dynamically regulated based on data indicative of the reliability of a connection. In clone blocking, the receiving host verifies that a new connection that appears redundant is a re-established connection from the initiating host rather than a cloned connection. In bandwidth leveling, data bursts pending on initiating hosts that exceed a predetermined size are scheduled for transmission to receiving hosts.11-27-2008
20100290349METHOD AND APPARATUS FOR TESTING A BROADBAND INTERNET CONNECTION - This invention relates to a method and apparatus for testing a broadband internet connection, in particular, but not limited to, the suitability of the broadband internet connection for providing access point base station services.11-18-2010
20080267079Network-wide clear channel assessment threshold - Overall network throughput may be increased in a wireless network through a common network-wide clear channel assessment (CCA) threshold. Each access point performs measurements, and determines suitable CCA thresholds and throughput estimates for each data rate. Results are reported to a central controller that determines the network-wide CCA threshold. The network-wide CCA threshold is then used by all access points and mobile stations.10-30-2008
20080267080Fault Verification for an Unpaired Unidirectional Switched-Path - A communications network comprises a first node and a second node. The communications network further comprises an unpaired switched-path between the first and second nodes. Connectivity of the unpaired switched-path is tested by the first node transmitting a probe message along the unpaired switched-path and waiting to receive a probe message response as connectionless traffic from the second node. Also disclosed is a communications network component comprising logic that selectively verifies connectivity of a unidirectional communication path based on a probe message transmitted as connection-oriented traffic along the unidirectional communication path and a time limit in which to receive a probe message response as connectionless traffic. Also disclosed is a communications network component comprising at least one processor configured to implement a method. The method comprises selectively transmitting a probe message along a unidirectional connection-oriented path and waiting to receive a virtual local area network (VLAN)-based probe message response.10-30-2008
20090190481ROUTE CONFIRMATION METHOD AND DEVICE - In order to preliminarily confirming whether or not a protection route to be switched over can be safely switched over during a working route being used in a unicast or multicast mode. a notification of communication confirmation/quality confirmation or multicast communication confirmation is received from a manager device is received. When the received unicast or multicast packet does not include an confirmation identifier instructed by the notification while the received unicast or multicast packet includes a destination network or multicast address instructed by the notification, the received packet is mirrored and the confirmation identifier is set in a predetermined area within a header of the packet to be transferred to a preselected protection route. When the received packet includes the destination network or multicast address and the confirmation identifier instructed by the notification, the manager device is notified of a result of the communication confirmation/quality confirmation and the packet is transferred to the protection route.07-30-2009
20110267965METHOD, DEVICE, AND SYSTEM FOR CONNECTIVITY CHECK - The present invention relates to the field of communication technologies and discloses a method, device, and system for connectivity check. The method includes the following: a Media Gateway (MGW) receives an Additional Connectivity Check message sent by a Media Gateway Controller (MGC); and the MGW performs an additional connectivity check according to the Additional Connectivity Check message. With the connectivity check method, device, and system of the present invention, the efficiency of the connectivity check may be improved.11-03-2011
20090161564TRANSMISSION APPARATUS AND ALARM CONTROL METHOD - A transmission apparatus having a function of establishing a connection of a path that is a signal communications channel in a communications network includes a masking part configured to mask an alarm detected after the connection of the path is established in the transmission apparatus; an alarm status detection part configured to detect a change in the status of the alarm; and an unmasking part configured to unmask the alarm masked by the masking part in response to the alarm status detection part detecting the change in the status of the alarm.06-25-2009
20080316932Identifying method for network device - An identifying method includes the following steps. First, a network device automatically retrieves a network address as the address thereof. Then, a testing host transmits at least one network protocol package to the network device. The network protocol package includes a network protocol header and the network protocol data, which defines the address of the network device. Accordingly, the testing host can identify the network device according to the address of the network device.12-25-2008
20090185497DETECTING OUTBOUND NAGLING ON A TCP NETWORK CONNECTION - Systems and media for detecting outbound Nagling on a TCP network connection are disclosed. Embodiments may include creating by a sender computer one or more segments to be transmitted to a receiver computer and determining by the sender computer whether any of the one or more segments to be transmitted are small segments and determining whether a previously transmitted small segment is unacknowledged by the receiver computer. If the previously transmitted small segment is unacknowledged by the receiver computer and at least one of the segments to be transmitted is a small segment, embodiments may also include detecting by the sender computer a Nagling condition on the network connection. Further embodiments may include modifying a Nagle algorithm configuration of the network connection in response to the detected Nagling condition by turning off the Nagle algorithm or reducing a delayed acknowledgement timer for the network connection.07-23-2009
20110205909METHOD, NODE AND SYSTEM FOR OBTAINING LINK AGGREGATION GROUP INFORMATION - A method for obtaining link aggregation group (LAG) information, and a node and a system thereof are provided, which belong to the field of communication technologies. The method includes the following steps. An ingress node of a label switched path (LSP) sends an echo request message to another node on the LSP, in which the message carries identification information, and the identification information is for identifying that the LAG information on the LSP needs to be obtained. The ingress node receives an echo reply message returned by said another node, in which the message carries LAG information between said another node and a next hop node on the LSP. The present invention implements the obtaining of LAG information on the LSP and brings great convenience to OAM of MPLS network, and has the advantages of being simple, convenient, and easy to implement and having strong practicality.08-25-2011
20090080336CHARACTERIZATION OF NETWORK PATH QUALITY FOR NETWORK APPLICATIONS AND SERVICES - A service for facilitating a determination of path quality between a first endpoint node and a second endpoint node in a network of nodes is provided. Path quality information is aggregated from across network internet service providers (ISPs), giving authorized endpoints access to path quality information for specified path segments of a path to another endpoint. Path quality information includes one or more metrics that measure available bandwidth, loss rate and/or latency.03-26-2009
20090052337RESPONDING TO CHANGE IN A DATA COMMUNICATION NETWORK SYSTEM - A method and system for responding to changes in the system. The system includes two or more routers which are electrically connected together in a network tree structure. Each router includes an electronic connection port and a routing table. A direct current balance exists at the electronic connection port of each route. A change in the direct current balance at the electronic connection port of at least one router of the two or more routers is detected. An occurrence of changes in the system that relate to each router of the at least one router is ascertained from the detecting. Responsive to the ascertaining, a new routing table is generated for each router of the at least one router. Each new table includes the changes in the system that relate to each route of the at least one router.02-26-2009
20110222414METHOD AND APPARATUS FOR ACTIVE PROBING OF TUNNELED INTERNET PROTOCOL (IP) TRANSMISSION PATHS - A method, apparatus, and system in an IP-based mobile communication network for actively probing a tunneled transmission path from a base station such as an eNB to a core network. A UE-emulator emulates a User Equipment (UE) and provides emulated NAS signaling to a Probe Connection Control (PCC) unit in the base station, which establishes the tunneled transmission path by forwarding the NAS signaling received from the emulator toward the core network. The PCC stores associated communication endpoints and UE-assigned IP addresses. A Probe Traffic Control (PTC) unit within the base station utilizes the stored endpoints and IP addresses to generate probe traffic through the tunneled transmission path toward a probe server or another base station configured as a probe reflector. The probe reflector collects and reports path properties such as packet loss, delay, jitter, and throughput.09-15-2011
20090080337Method and Systems For Verifying a Connection From a Gateway to a Network - There are disclosed methods and systems for verifying a connection between a subscriber station and a network wherein a gateway resides intermediate the subscriber station and the network. A method may include receiving instructions from a remote verification host. In response to the instructions, a tester may be introduced into the connection. The tester may receive an IP address of the subscriber station. The tester may use the IP address to perform at least one connectivity test between the gateway and the network. The tester may generate an output reporting a result of the at least one connectivity test.03-26-2009
20090086644DETECTING DATA PLANE LIVELINESS OF A LABEL-SWITCHED PATH - Detecting if a label-switched path (LSP) is functioning properly. To test that packets that belong to a particular Forwarding Equivalence Class (FEC) actually end their MPLS LSP on an label switching router (LSR) that is an egress for that FEC, a request message carrying information about the FEC whose LSP is being verified may be used. The request message may be forwarded like any other packet belonging to that FEC. A basic connectivity test as well as a fault isolation test are supported. In a basic connectivity test mode, the packet should reach the end of the LSP, at which point it is sent to the control plane of the egress LSR. The LSR then verifies that it is indeed an egress for the FEC. In a fault isolation test mode, the packet is sent to the control plane of each transit LSR, which performs various checks that it is indeed a transit LSR for the LSP. The transit LSR may also return further information that helps check the control plane against the data plane, i.e., that forwarding matches what the routing protocols determined as the path. A reliable return path is used for the reply.04-02-2009
20090086643PATH TESTING AND SWITCHING - A method may include forming a first path from a first node to a second node and transmitting data via the first path. The method also includes measuring a performance parameter associated with transmitting data via the first path and determining whether the measured performance parameter meet a required performance parameter. The method also includes sending a notification to a customer associated with the first path when the measured performance parameter does not meet the required performance parameter, where the notification indicates that the first path is unavailable.04-02-2009
20090109863INTERACTIVITY WITH A BUS INTERFACE CARD - A system and method are provided for testing the bus interface assembly in order to determine if the bus interface assembly is configured to interface with a data bus between an aircraft and a store. If the bus interface assembly is determined not to be properly configured, a troubleshooting routine can be deployed to more specifically identify a malfunction of the bus interface assembly, thereby facilitating the repair of the bus interface assembly. Moreover, the system and method may also program the bus interface assembly. By providing the capability to test and troubleshoot and, in some instances, program the bus interface assembly, the bus interface assembly may be more readily deployed and the performance of the bus interface assembly may be assured, thereby promoting the reliability of the bus interface assembly and the associated communications transferred across the data bus between the aircraft and the store.04-30-2009
20090135727Anomaly Detection and Diagnosis Using Passive Monitoring - A system and method for determining optimal selection of paths for passively monitoring a communications network. A diagnostic set of paths is determined by ensuring that, for all pairs of links in the network, the set contains one path having only one member of that pair. A detection subset of paths is determined by ensuring that, for all the links in the network, one member of the subset contains that link. Selecting a minimum detection and diagnostic set of paths minimizes the communication overhead imposed by monitoring. During normal operation, only the detection subset need be monitored. Once an anomaly is detected, the system may switch to monitoring the full diagnostic set. The cost of deploying and operating the passive monitoring equipment is minimized by determining the minimum set of links on which a probe needs to be placed in order to monitor the diagnostic set of paths.05-28-2009
20090238084Network monitoring using a proxy - A method and apparatus for network monitoring using a proxy are disclosed. In one embodiment, a method generally comprises receiving at a proxy, path information for a label switched path (LSP) from a forwarding device located in the LSP, generating a connectivity verification message based on the path information, adding a proxy label to the connectivity verification message, and transmitting the connectivity verification message to the forwarding device. The proxy label is configured to inject the connectivity verification message into a forwarding plane at the forwarding device and the connectivity verification message is configured for transmittal from the forwarding device over the LSP to a destination node to verify a forwarding path associated with the path information received from the forwarding device.09-24-2009
20090252044Reliable ISP Access Cloud state detection method and apparatus - A Multi-Homing System is equipped with an Adaptive ISP Access Cloud State Detection apparatus (ACSD) that improves the reliability of the availability of digital connections (links) between computer sites, such as a Computer Premises Network and the Internet, in which such connections are made by connecting through a multiplicity of ISP Access Clouds (links). Reliability is improved over prior art methods by using data elements of Internet Protocol datagrams, e.g. record fields or bits of fields, that are regularly and normally exchanged between the ISP Access Clouds and the CPN without creating additional data traffic. Data Elements from each ISP Access Cloud are used by processing functions of the by the ACSD to test for conditions that indicate that it may be in a DOWN status, when a DOWN status is suspected, other functions in the ACSD initiate transmission of a set of PROBE packets that can reliably determine if the suspect link is actually DOWN or merely giving a response that would be interpreted as DOWN by prior art methods.10-08-2009
20100149997METHODS AND SYSTEMS TO VERIFY A COMMUNICATION PATH BETWEEN A FIELD DEVICE AND A PROCESS CONTROLLER IN A PROCESS CONTROL SYSTEM - Example methods and systems to verify a communication path between a field device and a process controller in a process control system are disclosed. A disclosed example method includes transmitting via a first wireless communication path to a first portion of a process control system associated with one of the field device or the process controller, a command signal from a verification controller. In response to receiving the command signal in the first portion of the process control system, transmitting a verification signal via a first wired communication path from the first portion of the process control system to a second portion of the process control system associated with the other one of the field device or the process controller. Then, in response to receiving the verification signal in the second portion of the process control system, transmitting a reception signal via a second wireless communication path from the second portion of the process control system to the verification controller and in response to receiving the verification signal in the verification controller, verifying the communication path between the field device and the process controller.06-17-2010
20100149998IDENTIFYING ANALOG ACCESS LINE IMPAIRMENTS USING DIGITAL MEASUREMENTS - The preferred embodiments include a method, system or computer-readable storage medium for identifying analog access line impairments in a communications network. The embodiments include determining a ping packet loss count and a ping failure count from digital packet loss data associated with at least one analog access line. The embodiments also include generating a line designation for the at least one analog access line in response to the ping packet loss count exceeding a first threshold and the ping failure count exceeding a second threshold. Also, a plurality of pings can be transmitted during a testing period, the digital packet loss data being generated in response to the plurality of pings. The first threshold can represent at least a three percent ping packet loss. The second threshold can represent the ping failure count being at least ten percent of a total number of the plurality of pings.06-17-2010
20100182913CONNECTIVITY FAULT MANAGEMENT FOR ETHERNET TREE (E-TREE) TYPE SERVICES - A Maintenance Association and corresponding method for configuring maintenance entities for Ethernet Tree (E-Tree) type service instances. A root MEP communicates with each of a plurality of leaf MEPs. Remote MEP state machine instances are activated within the root MEP for each of the plurality of leaf MEPs. Within each leaf MEP, however, only the remote MEP state machine instance for the root MEP is activated while leaving the remote MEP state machine instances for all other leaf MEPs in an inactive state in which Connectivity Check Messages (CCMs) are not exchanged.07-22-2010
20100177643METHOD AND APPARATUS FOR QUALITY OF SERVICE DETERMINATION - A method of estimating bandwidth capacity, available bandwidth and utilization along a path in an IP network is disclosed. ICMP time-stamp requests are sent from a source host on the edge or inside the network to all routers on the end-to-end path to a desired destination. Differences between time-stamp values are used as indicators of QoS service at each router. The collected measurements are then processed at the sending host to infer QoS parameters in terms of path capacity in bit/sec, available bandwidth in bits/sec, individual link utilization and congestion at each router. These parameters can be combined to infer the QoS service in terms of bandwidth on the end-to-end path.07-15-2010
20090116396OAM echo messaging to verify a service-based network distribution path - Echo messaging for operation, administration, and management of a service-based distribution path and associated services are disclosed. Service-based distribution paths or transport tunnels include services mapped or bound to a path associated with the transport tunnel. Echo messaging provides OAM capabilities to monitor the operational state of a service-based distribution path, including determining configuration, connectivity, and other characteristics of the path and associated services that transport data. OAM functions provided by echo messaging enable OAM functions despite service volume along a core network, path or set of paths.05-07-2009
20090073886Methods and Computer-Readable Media for Testing a Network Connection at a Computing Device - A computer-readable medium is provided, comprising a set of instructions for execution by a processor of a computing device at a subscriber premises. The processor is operable to execute a software application that enables the computing device to participate in a media connection over a data network. Execution of the set of instructions by the processor causes the computing device to execute a method that includes performing a connectivity test over a test connection established through a gateway at the subscriber premises and over the data network; and prior to performing a connectivity test, provisioning the gateway to enable establishment of said test connection.03-19-2009
20100322083DETECTION AND REMOVAL OF ROUTING LOOPS IN A MOBILE INTERNET PROTOCOL NETWORK - A method and a node are provided to detect routing loops in mobile Internet Protocol networks. A legitimate mobile node may register at a home agent by sending a binding message carrying a home address and a care-of address. The home agent stores the addresses in a binding cache entry. It is possible for a malicious node to send a binding message to one HA, resulting in a HoA being assigned by the HA. Then the malicious node may use this HoA as a CoA for registration at another HA. If the malicious MN uses the HoA assigned by the second HA as a CoA and updates the binding at the first HA, a routing loop is created. The present invention verifies the presence of a routing loop responsive to the receipt of the binding message. If a routing loop is detected, the binding cache entry is deleted.12-23-2010
20100322084Method and Device for Transport Delay Analysis - The present invention relates to a method and a device for analyzing transport delay between a sender device and a receiver device in a communication system. In particular, the present invention relates to a method for estimating transport delay in a communication system comprising a sender device dividing a frame into segments, wherein each segment is transmitted in a packet with a send time stamp to a receiver device, the method comprising the steps of: receiving and time stamping packets with a receipt time stamp; identifying the relative-position of packets in a frame; calculating the offset of one or more packets in a frame, and performing transport delay analysis based on the send time stamp, the receipt time stamp, and the calculated offset of the one or more packets.12-23-2010
20110002226Method for Discovering Routes in Wireless Communications Networks - A method and system discovers a route in a wireless communications network, FIG. 01-06-2011
20100220602METHOD AND SYSTEM FOR SELF-TERMINATING A MEDIA SERVICE DUE TO AN OUT-OF-COVERAGE CONDITION - A method and mobile device that self-terminates a media service if an out-of-coverage condition is detected. The media service operates on top of a connectionless peer-to-peer packet-based transport protocol. The out-of-coverage condition may relate to the mobile device itself or to a remote mobile device engaged in the media service. The loss of coverage by the remote mobile device may be detected by observing whether the remote mobile device has failed to send any data packets for more than a predetermined period of time. If an out-of-coverage situation is detected, then the method or device initiates service cancellation or release.09-02-2010
20100177642CORRELATIVE ANTICIPATORY DELTACASTING - Methods, apparatuses, and systems for improving utilization of a communications system (e.g., a satellite communications system) are provided through techniques referred to herein as “deltacasting.” Some embodiments use a server-side optimizer to intercept and create fingerprints of byte-level content data traversing links of the communications system. The content fingerprints are used to transparently identify communications patterns (e.g., repetitious downloads of the same content, correlations between users, etc.), which may then be used in exploiting multicasting and/or other opportunities for increased utilization of the communication links.07-15-2010
20110075572ROBUST MULTICAST BROADCASTING - A method and system for multicasting IPTV channels includes using both a designated and a redundant network routing device. When the designated routing device detects that an MCDN network connection to an IPTV multicast source is unavailable, the designated routing device reduces its designation priority to a lower value. A message is sent to the redundant routing device with an instruction to increase its designation priority to a higher value. After the designation priorities have been modified, the designated routing device may serve as a new redundant routing device, while the redundant routing device may serve as a new designated routing device. The routing devices may remain in the new configuration, even after interrupted network connections are restored.03-31-2011
20100135164MILLIMETER WAVE PROBING OF COMPONENTS VIA A PROBE DEVICE AND METHODS FOR USE THEREWITH - Probe data is directly communicating between a probe device and a component of an external device via a wireless millimeter wave communication path. A probe application is executed in accordance with the probe data, for diagnostics and testing, to update component software, and to upload other files and applications to the component.06-03-2010
20090028058Directed Mesh Network with Link Evaluation - Techniques for communicating between a data user and a destination through a mesh network. The mesh network includes a communication node having a downstream component logically connected over a downlink to provide communications for a data user and a plurality of upstream components. The plurality of upstream components includes a first upstream component that is logically connected to a first data destination over a first uplink. The communication node also has a controlling component that selects the first upstream component based on a first comparative link quality of the first uplink, where the first downstream component is electrically coupled to the first upstream component. The controlling component determines the first comparative link quality from a plurality of link quality metrics, where a corresponding weight is associated with each link quality metric.01-29-2009
20110249570DATA PATH DIFFERENTIATOR FOR PRE-EMPHASIS REQUIREMENT OR SLOT IDENTIFICATION - An apparatus and method is disclosed for generating path length information for two (usually redundant) receive paths in a receiving device such as a server blade so that the proper amount of equalization and/or pre-emphasis may be applied to receiver and driver circuits in the server blade. In one embodiment, the path length information comprises a longer or shorter path determination, and may also include a estimation of the slot location. In another embodiment, the path length information comprises a representation of the length of two receive paths. The path length information generating circuit is connected to the two receive inputs of the receiving device though high impedance elements, and the path length information may be utilized by hardware or a processor to set the equalization or pre-emphasis in the receiver and/or driver.10-13-2011
20090213738TEST SYSTEM WITH USER SELECTABLE CHANNEL - A test system comprising: acquiring an upstream channel descriptor list; entering a pause network state when the upstream channel descriptor list is completed; and selecting a particular channel from the upstream channel descriptor list before exiting the pause network state.08-27-2009
20110075574PATH PROTECTION BY SHARING CONTINUITY CHECK MESSAGES - A method for managing protection of a plurality of defined paths in a communication system including listing the defined paths, each item in the list including a defined path identifier, a defined path ingress node, a defined path egress node, and a defined path protection period, wherein some of the defined paths share an ingress node and an egress node, managing a sending of Continuity Check Messages (CCMs) along at least some of the defined paths, such that a CCM is sent every protection period, and for at least a plurality of the defined paths which share an ingress node and an egress node, managing a sharing of the protection of the plurality of the defined paths, the sharing including sending one set of CCMs, shared by the plurality of the defined paths, at a frequency based, at least in part, on a shortest one of the protection periods of the plurality of the defined paths. A method for protecting a plurality of paths which share at least one leg in a communication network, including sharing, between the paths, Continuity Check Messages (CCMs) for at least the shared leg. Related apparatus and methods are also described.03-31-2011
20110075573RING NETWORK SYSTEM AND COMMUNICATION PATH CONTROL METHOD - A control node includes: a monitoring packet transmission section for transmitting a monitoring packet; a monitoring packet reception section for receiving a monitoring packet; an adjustment section for selecting a redundant node from a non-control nodes; a packet generation section for generating a setup packet for specifying the redundant node out of the non-control nodes in accordance with information about the redundant node selected by the adjustment section; and a packet transmission section for transmitting the setup packet to the non-control node. The non-control node includes a control section that acquires information about the traffic upon receiving the monitoring packet, transmits a monitoring packet after acquisition of the traffic, and specifies the non-control node as the redundant node based on information about the redundant node contained in the setup packet upon receiving the setup packet.03-31-2011
20110069619CONGESTION AND THRU-PUT VISIBILITY AND ISOLATION - Offering vertical services to subscribers and service providers is an avenue to immediately improve the competitiveness of digital subscriber line access service, for example of the type offered by a local exchange carrier. To deliver high-quality vertical services, however, the underlying ADSL Data Network (ADN) or the like needs to establish Quality of Service (QoS) as a core characteristic and offer an efficient mechanism for insertion of the vertical services. The inventive network architecture introduces QoS into the ADN, in a manner that enables the delivery of sophisticated and demanding IP-based services to subscribers, does not affect existing Internet tiers of service, and is cost-effective in terms of initial costs, build-out, and ongoing operations. The architecture utilizes a switch capable of examining and selectively forwarding packets or frames based on higher layer information in the protocol stack, that is to say on information that is encapsulated in the layer-2 information utilized to define normal connectivity through the network. The switch enables segregation of upstream traffic by type and downstream aggregation of Internet traffic together with traffic from a local services domain for vertical services and other local services. Systems coupled to the local services domain alone or in combination with software in servers and/or a user's computer enable a testing of connectivity, throughput, QoS metrics and the like through selected points of the ADN network.03-24-2011
20100246414NETWORK RETRANSMISSION PROTOCOLS USING A PROXY NODE - One embodiment relates to a method for communicating over a transmission medium shared between a plurality of nodes including a source node, a proxy node, and other nodes. In the method, a transmission data unit is transmitted from the source node to the proxy node and to the other nodes. A confirmation is selectively transmitted from the proxy node to the other nodes based on whether a reception data unit corresponding to the transmission data unit is correctly received at the proxy node. Based on whether the confirmation is received at one of the other nodes, a negative acknowledgement is selectively transmitted from the one of the other nodes to the source node. Other methods and devices are also disclosed.09-30-2010
20110149748Path-continuity check method and transmission device - Disclosed is a path-continuity check method for checking continuity of a path. The method includes transmitting a check frame by a node device on an upstream side and receiving the check frame by a node device on a downstream side; registering, by the node device on the upstream side, path information of the check frame and a transmission port in a transmission learning table together with a downstream learning number as a table number of a reception learning table of the node device on the downstream side in which the path information is registered; and setting, by the node device on the upstream side, plural of the downstream learning numbers registered in the transmission learning table in one aggregation check frame as table number ON information items and transmitting, by the node device on the upstream side, the one aggregation check frame to the node device on the downstream side.06-23-2011
20100080131Validation of Routes Advertised by Border Gateway Protocol - Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with validation of routes advertised by Border Gateway Protocol. One embodiment validates or invalidates a route received in a Border Gateway Protocol (BGP) update message. A route is validated in response to determining that the originating autonomous system specified in the AS_Path attribute for the route in a received BGP update message has authority to advertise the route and/or whether or not multiple autonomous systems identified in the AS_Path attribute of the update message is authorized to advertise the route, possibly in a particular order.04-01-2010
20100061253Tracing connection paths through transparent proxies - In one embodiment, a method for tracing a connection path from a source node to a destination node through a network having one or more transparent proxies includes generating a trace packet at the source node, transmitting the trace packet over the network towards the destination node, and receiving trace response packets in response to transmission of the trace packet. The trace response packets include a packet from the destination node and a packet from each of the transparent proxies in a data path from the source node to the destination node. Each of the packets from the transparent proxies includes an identifier of the transparent proxy transmitting the packet. The method further includes identifying the transparent proxies in the connection path based on information in the trace response packets. An apparatus for tracing a connection path is also disclosed.03-11-2010
20110211462METHODS AND SYSTEMS FOR SCHEDULING IN A VIRTUAL MIMO COMMUNICATION ENVIRONMENT - A system and method for scheduling cooperative uplink transmissions a virtual multiple input multiple output (MIMO) wireless communication environment are provided. More specifically, both random and channel aware orthogonal scheduling techniques for identifying a sub-set of N mobile terminals to provide cooperative uplink transmissions for each transmit time interval are provided.09-01-2011
20110255423METHOD FOR DETECTING A PROXY ARP AGENT IN SECURE NETWORKS HAVING EMBEDDED CONTROLLERS - A method for detecting a proxy Address Resolution Protocol (ARP) agent in a network including at least a first machine with an IP address in a range of a first subnet, and at least one embedded controller with an IP address in a range of a second subnet. A router is also provided, wherein the second subnet is not contactable through the router provided its proxy ARP is disabled. The first machine and second machine each have static routes for inter-subnet communications. A test IP address is identified by the first machine. A test Media Access Control (MAC) address corresponding to the test IP address is then obtained. The test MAC address is compared to a range of MAC addresses for the embedded controller. An alarm is generated at the first machine if the test MAC address is outside the range of MAC addresses that can prompt actions to remove the proxy ARP condition.10-20-2011
20080198755PROBING-BASED MECHANISM TO REDUCE PREEMPTION PERTURBATION CAUSED BY HIGHER PRIORITY TUNNEL ESTABLISHMENT IN A COMPUTER NETWORK - In one embodiment, a routing node (e.g., a head-end node) determines a desire to route a selected tunnel (e.g., reroute), and computes a path for the selected tunnel. The routing node probes the path to discover information about tunnels that would be displaced by the selected tunnel if routed over the path (e.g., a number of tunnels), and correspondingly determines whether to establish the selected tunnel based on the information about the tunnels to be displaced. In another embodiment, intermediate nodes along the probed path of the selected tunnel may receive a probe (e.g., signaling message) requesting information about the tunnels that would be displaced by the selected tunnel. In response, each intermediate node inserts the information about the tunnels to be displaced at the intermediate node into the probe, and forwards the probe (e.g., toward the routing node initiating the probe).08-21-2008
20080253296Method and Communication Arragement for Testing Subscriber Lines - To test at least one subscriber line that can be connected to a line unit, at least one test signal is emitted along the subscriber line, when the latter is not actively connected, and at least one resultant first echo signal is received, recorded and stored. In the short-circuited or open condition of the subscriber line, the test signal or signals is/are emitted via said line and at least one resultant second echo signal is stored. If an error occurs, the test signal or signals is/are emitted along the subscriber line and at least one resultant error echo signal is recorded, said error echo signal being compared with the first and/or second echo signal or signals. The advantage of the invention is that the location of an interruption in the subscriber line can be determined locally without the use of complex measuring devices.10-16-2008
20100246415NETWORK TESTING METHOD AND SYSTEM - In order to preliminarily perform a load test or the like of an IP network, a test apparatus instructs a test packet transmitting device to transmit a test packet having a specified multicast address and instructs a test packet receiving device to receive the test packet of the multicast address. The test apparatus further instructs a first relay device to relay the test packet of the multicast address and instructs a second relay device to perform a route optimization excluding processing. The test packet receiving device requests the second relay device to transfer the test packet of the multicast address when the test packet receiving device has received the instruction to receive the test packet.09-30-2010
20100195508Method for checking ring network redundancy - A method for checking a ring network redundancy includes a first exchanger and a second exchanger. When the first exchanger is set as a master, the plurality of second exchangers serve as the ring members; the first exchanger has a connection port, which is set as blocking, and the rest of connection ports are set as forwarding. The plurality of second exchangers regularly detects the plurality of connection ports for any outstanding status occurred in the connection status. When an outstanding status occurred, the CF5 is transmitted to the first exchanger and the first exchanger converts the connection port into the forwarding status, and the CF4 is transmitted to the plurality of second exchangers in order to renew the Mac address table. The method of sending out CF through a plurality of ring members can reduce the risk of losing the CF due to overloading network or having too much single network equipments, and thereby increase the reliability of the ring network during the redundancy checking.08-05-2010
20110188383SYSTEM AND METHOD FOR ELECTRONICALLY IDENTIFYING CONNECTIONS OF A CROSS-CONNECT SYSTEM - One embodiment is directed to a cross-connect system. The cross-connect system comprises a plurality of termination points configured to establish a plurality of physical information connections and a plurality of physical scanning connections. Each information connection is associated with a respective scanning connection. Each scanning connection is separate from the respective information connection associated with that scanning connection. The system is configured to selectively transmit a respective scanning signal from each termination point over a respective one of the scanning connections. The system is configured to selectively receive a respective scanning signal at each termination point from a respective one of the scanning connections. Connection information is derived from the scanning signals communicated over the scanning connections.08-04-2011
20110216659MULTIUSER SCHEDULING IN WLAN SYSTEMS - An apparatus for wireless communications is provided including a processing system. The processing system is configured to determine path-losses between the apparatus and a plurality of wireless nodes, to group the plurality of wireless nodes into sets based on the determined path-losses, and to exchange data with at least one of the wireless nodes in one of the sets.09-08-2011
20100226260SPANNING TREE RING PROTOCOL - A plurality of network devices such as routers are included in an instance of a spanning tree. The network device creates a ring context on a port that it identifies as both a blocking port and configured to run a spanning tree protocol. The ring context can be comprised of a region name, an STP domain name or a spanning tree instance. The network device transmits a ring discover message for the ring context over a forwarding port and determines that a ring exists when it receives the message at a blocking port. The network device subsequently transmits a reverse ring discover message from its blocking port which includes the status of the discovered ring to the members of the ring topology.09-09-2010
20120099444INTERFERENCE CONTROL - A method for controlling interference is described. The method includes receiving an indication that a first carrier is not received by a first base station and a second carrier is received by the first base station (04-26-2012
20110116388COMMUNICATION METHOD, AND TRANSMITTING APPARATUS AND RECEIVING APPARATUS USING THAT COMMUNICATION METHOD - A method for communicating in a communication apparatus includes receiving an orthogonal frequency division multiplexing (OFDM) signal transmitted from a base station, the OFDM signal including a plurality of carrier groups, each carrier group including a plurality of carriers. The plurality of carrier groups are assigned transmission data for a plurality of communication apparatuses, and each of the plurality of carrier groups adopts one of a first transmission mode in which the transmission data is transmitted using one modulated signal and a second transmission mode in which the transmission data is transmitted using a plurality of modulated signals. A carrier group, to which transmission data for the communication apparatus is assigned, is specified based on control information included in the received OFDM signal. Reception data associated with the specified carrier group is generated by decoding the one modulated signal used in the first transmission mode, when the first transmission mode is adopted for the specified carrier group, and reception data associated with the specified carrier group is generated by decoding the plurality of modulated signals used in the second transmission mode when the second transmission mode, is adopted for the specified carrier group.05-19-2011
20080304419DETERMINING CONNECTIVITY BETWEEN ENDPOINTS IN A NETWORK - A method of determining connectivity between two endpoints in a communications network is described. The method includes identifying transport addresses associated with each of the two endpoints and determining pairs of the transport addresses identifying a transmission path between the two endpoints. The method then proceeds to determining, at each endpoint, which of the pairs of transport addresses identifies a unique transmission path; and then performing connectivity checks at each endpoint for each pair identifying a unique transmission path.12-11-2008
20120039186METHOD AND APPARATUS TO REDUCE CUMULATIVE EFFECT OF DYNAMIC METRIC ADVERTISEMENT IN SMART GRID/SENSOR NETWORKS - In one embodiment, a node in a computer network represented by a directed acyclic graph (DAG) may receive advertisements of smoothed path costs to a root node of the DAG, where the advertisements contain a field for a virtual gain factor (VGF) indicative of a difference between the smoothed path cost and an actual best path cost to the root. The node may then determine a local smoothed path cost from itself to the root, and also a local VGF for each link of the node (for the path as a whole including the particular link) based on all of the received advertisements and VGFs, as well as corresponding actual link costs (e.g., based on selecting alternative parents or actual link costs being smoothed within a dual threshold). The node may then compute a resulting smoothed path cost to the root along with an associated (cumulative) VGF based on the locally determined cost and VGF. Accordingly, the node may then advertise the resulting smoothed path cost along with the associated (cumulative) VGF on each link such that, for example, any node receiving a resulting smoothed path cost and/or VGF that surpasses a threshold may request a rebuild of the DAG (e.g., a portion or in its entirety).02-16-2012
20100097942SERIALIZER/DESERIALIZER TEST MODES - Serializer, deserializer, and/or serdes ICs are configured to support one or more test modes to enable end-to-end testing in communication links in which the ICs are implemented. To support the end-to-end testing, the ICs can include a multiplexing stage with means for deterministically mapping a plurality of input parallel data signals to at least one output serial data signal and/or a demultiplexing stage with means for deterministically mapping at least one input serial data signal to a plurality of output parallel data signals. When used in combination in a communication link, the means included in the multiplexing stage and demultiplexing stage deterministically map specific input parallel data signals to specific output parallel data signals.04-22-2010
20110063986SYSTEM AND METHOD FOR LOAD BALANCING TRAFFIC IN A MPLS NETWORK - A method and system for managing traffic between a first provider edge and a second provider edge in a network. The network includes logical paths between the first provider edge and the second provider edge. For each logical path, jitter, packet delay, and packet loss are identified. For each logical path, a path usage is calculated as a function of the identified jitter, packet delay, and packet loss. Most recent data received by the first provider edge is transmitted to the second provider edge via a selected logical path that has a highest path usage for which transmitting the received most recent data does not result in the selected logical path managing a higher percentage of network traffic than is dictated by the highest usage value for the selected logical path.03-17-2011
20110063985METHODS, APPARATUS AND ARTICLES OF MANUFACTURE TO MONITOR TUNNELS WITHIN TRAFFIC ENGINEERING/FAST REROUTE ENABLED NETWORKS - Example methods and apparatus to monitor tunnels within traffic engineering/fast reroute (TE/FRR) enabled networks are disclosed. A disclosed example apparatus includes a message interface to receive from a router a change alert notification for a traffic engineering (TE) tunnel, a router interrogator to interrogate the router to obtain updated path information for the TE tunnel in response to the received change alert notification, and a topology database interface to update a database representative of a tunnel topology of a TE/FRR enabled network based on the updated path information.03-17-2011
20120044815INTERFERENCE COORDINATION FOR PEER-TO-PEER (P2P) COMMUNICATION AND WIDE AREA NETWORK (WAN) COMMUNICATION - Techniques for supporting peer-to-peer (P2P) communication in a wide area network (WAN) are disclosed. In an aspect, interference coordination between P2P devices engaged in P2P communication and WAN devices engaged in WAN communication may be performed based on a network-controlled architecture. For the network-controlled architecture, P2P devices may detect other P2P devices and/or WAN devices and may send measurements (e.g., for pathloss, interference, etc.) for the detected devices to the WAN (e.g., serving base stations). The WAN may perform resource partitioning and/or association for the P2P devices based on the measurements. Association may include selection of P2P communication or WAN communication for a given P2P device. Resource partitioning may include allocation of resources to a group of P2P devices for P2P communication. The WAN may send the results of association and/or resource partitioning to the P2P devices, which may communicate in accordance with the association and/or resource partitioning results.02-23-2012
20120063330WIRELESS NETWORK PATH SETTING APPARATUS AND METHOD - A wireless network path setting apparatus includes a receiving module configured to receive input of wireless network paths, an investigating module configured to investigate a communication environment and status of each of routes constituting the wireless network paths that have been input through the receiving module, and a registering module configured to register the wireless network paths that have been input through the receiving module as network paths to be used in a field wireless system if the communication environment and status of each route investigated by the investigating module is appropriate.03-15-2012
20120063329Manageability Tools for Lossless Networks - Manageability tools are provided for allowing an administrator to have better control over switches in a lossless network of switches. These tools provide the ability to detect slow drain and congestion bottlenecks, detect stuck virtual channels and loss of credits, while hold times on edge ASICs to be different from hold times encore ASICs, and mitigate severe latency bottlenecks.03-15-2012
20120008508Method and System for Removing Dead Access Control Entries (ACEs) - Methods and systems have been provided for removing dead Access Control Entries (ACEs) in an Access Control List (ACL). In one embodiment, the dead ACEs can be detected for an egress as well as an ingress ACL. The ACEs that have a hit count above a user-specified hit count are checked for their validity. The validity of the ACE is checked, using the information based on a Forwarding Information Base (FIB). If an ACE is found to be invalid, it is considered dead. The dead ACEs are referred as candidates for removal from the ACL. If the ACE is found to be a candidate for removal, a system administrator can either warn the network administrator about the candidate for removal or delete the ACE from the ACL after a pre-defined time limit.01-12-2012
20120014263SYSTEMS AND METHODS OF SNOOPING CONNECTIVITY FAULT MESSAGES TO CONFIGURE MAINTENANCE END POINT FOR ALARM SUPPRESSION MESSAGES - According to one embodiment, a method may include a given maintenance end point receiving connectivity fault management (CFM) messages (e.g., CCMs) at the provisioned maintenance level of the maintenance end point. Additionally the method may also include snooping CFM messages at maintenance levels higher the provisioned maintenance level of the given maintenance end point and storing the configuration information necessary for transmitting alarm indication suppression message from the lowest higher-level CFM message snooped across the maintenance end point. The method may further include a timeout of the stored information if transmission of the higher-level CFM messages cease. The method may include snooping these higher-level CFM messages in either direction and also include the ability to display the higher-level CFM information to an operator through a user-interface.01-19-2012
20120057474METHOD AND APPARATUS FOR HANDOVER CONTROL IN A MOBILE COMMUNICATION SYSTEM WITH CSG - Due to the coverage size of the CSG cell, handover to macro-cell may occur frequently. These handovers are not desirable to both the user and operators. However, to disable or delay the handover of the CSG Cell would cause UE experiencing radio link failure and not able to re-establish connection to other cells. The present invention introduces a method for the UE to increase the stickiness to the CSG cells based on the user preferences and application requirements. When applied, it keeps the UE to the CSG cell as long as possible and reduces the possibility of connection re-establishment failure. The invention is also applicable to the corporate network deployment with multiple CSG cells.03-08-2012
20110085450NETWORK PATH DISCOVERY AND ANALYSIS - A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.04-14-2011
20110085449NETWORK PATH DISCOVERY AND ANALYSIS - A network analysis system invokes an application specific, or source-destination specific, path discovery process. The application specific path discovery process determines the path(s) used by the application, collects performance data from the nodes along the path, and communicates this performance data to the network analysis system for subsequent performance analysis. The system may also maintain a database of prior network configurations to facilitate the identification of nodes that are off the path that may affect the current performance of the application. The system may also be specifically controlled so as to identify the path between any pair of specified nodes, and to optionally collect performance data associated with the path.04-14-2011
20120063331PATH ANALYZER - A path analyzer to obtain an address of a relay node on a path between a first terminal device and a second terminal device includes: a first address obtaining unit to issue a command requiring a response from the first terminal device to the second terminal device and to obtain as a first address an address of a first terminal device side in the relay node on the path; a broadcast processing unit to search a candidate address for a broadcast address from the relay node according to the first address obtained and to issue a command requiring a response from the first terminal device to the candidate address; and a second address obtaining unit to obtain as a second address an address of a second terminal device side in the relay node on the path according to a response to the command issued by the broadcast processing unit.03-15-2012
20120026896METHODS AND APPARATUS FOR POWER CONTROL IN MULTI-CARRIER WIRELESS SYSTEMS - Methods and apparatus disclosed maximize the capacity of serving cells and minimize inter-cell interferences due to power emission from serving cells in a multi-carrier, multi-cell communication system. The control methods and apparatus take into account various factors such as cell configuration, frequency reuse, geometry and path-loss information, transmission priority, subchannel configuration, feedback from other cells, or any combination thereof, and produce signals that control the transmission power levels and the modulation and coding of transmitted signals.02-02-2012
20110090802PATH TESTING AND SWITCHING - A method may include forming a first path from a first node to a second node and transmitting data via the first path. The method also includes measuring a performance parameter associated with transmitting data via the first path and determining whether the measured performance parameter meet a required performance parameter. The method also includes sending a notification to a customer associated with the first path when the measured performance parameter does not meet the required performance parameter, where the notification indicates that the first path is unavailable.04-21-2011
20100246412ETHERNET OAM FAULT PROPAGATION USING Y.1731/802.1AG PROTOCOL - Various exemplary embodiments relate to a method and related network node and machine-readable medium including one or more of the following: receiving a first indication of the existence of a fault in a connection related to a service provided by the node on which the maintenance endpoint is configured; determining that the connection related to the service provided by the node is located outside the scope of the maintenance association by determining that at least one node at which the connection having the fault terminates does not include a maintenance endpoint belonging to the maintenance association; constructing a message packet, the message packet including a second indication of the existence of the fault; and transmitting the message packet to the at least one peer maintenance endpoint within the maintenance association.09-30-2010
20100246413TRANSMISSION LINE SIMULATOR - A method and apparatus to simulate a length of telecommunications line. One or more bi-directional constant input impedance low pass or pole/zero filters are coupled in series with an attenuator to simulate a length of telecommunications line. The one or more filters are used to approximate the transfer function of the length of telecommunications line.09-30-2010
20100246411System and Method for Sending Packets Using Another Device's Network Address - A network analyzer gets configuration information, usually in the form of a configuration packet sent from a network monitor. The configuration information comprises a second device network address and a third device network address. The second device network address is that of the network monitor and the third device network address is that of a communication device that is to be monitored.09-30-2010
20120163196Automatic Address Range Detection for IP Networks - Mechanisms are provided for automatic address range detection for an IP network. Flow data is obtained comprising one of the source and destination IP addresses for the flow and one of (a) the other of the source and destination IP addresses and (b) direction data indicative of the flow direction across the network boundary. A tree data structure is generated representing the IP addresses in the flow data. IP addresses with initial portions in common are represented in the tree with at least one node in common. Weights are assigned to nodes in the tree in dependence on occurrences of the represented IP addresses in at least a subset of the flow data. The IP address range of the network is then detected by identifying, in dependence on the assigned weights, the node associated with the last initial address portion common to all IP addresses in the network. A device is automatically configured with the IP address range to permit distinction between IP addresses inside and outside the network in operation of the device, e.g. for filtering or traffic classification.06-28-2012
20120163195Method of Analyzing Interference Between Data Communication Terminals - A method may include distributing a interfered terminal; calculating an initial signal-to-interference power ratio and a data throughput of the interfered terminal; distributing interfering terminals and an interfering link base station; calculating a final transmitting power of the interfering terminal through power control between the interfering terminal and the interfering link base station; calculating a path loss and a collision factor between the interfered terminal and the interfering terminal; and calculating a final signal-to-interference power ratio and a data throughput of the interfered terminal. Accordingly, it is possible to to analyze interference in consideration of a terminal use pattern in view of presence of hot spots, and to provide basic data for setting an effective emission transmitting power level of the terminal and a protection band between the terminals since the signal-to-interference power ratio and the data throughput can be calculated through interference analysis.06-28-2012
20120134279DISTRIBUTED ANTENNA SYSTEM, DISTRIBUTED ANTENNA SWITCHING METHOD, BASE STATION APPARATUS AND ANTENNA SWITCHING DEVICE - In a distributed antenna system in which plural antennas are dispersed spatially, a base station apparatus 05-31-2012
20110182189Pseudowire status maintenance for static pseudowires - In one embodiment, a method includes generating an aggregated pseudowire status message at a first network device in a Multi-Protocol Label Switching (MPLS) network, transmitting the aggregated pseudowire status message to a second network device on a Label Switched Path (LSP) extending between the first and second network devices in the MPLS network, and establishing at the first network device, an aggregated pseudowire status session with the second network device upon receiving a response to the aggregated pseudowire status message on the LSP. The aggregated pseudowire status message configured to verify a current status of pseudowires on the LSP. An apparatus is also disclosed.07-28-2011
20120213092APPARATUS, METHOD, AND SYSTEM FOR UPLINK CONTROL CHANNEL RECEPTION IN A HETEROGENEOUS WIRELESS COMMUNICATION NETWORK - A method and system for improving the reception of uplink transmissions in a heterogeneous wireless communication system includes a high-power node such as a macro-cell and a low-power node such as a femto-cell or pico-cell. To address an uplink imbalance where a nearby low-power node power controls a UE such that uplink transmissions of an HSDPA control channel are poorly received at the serving cell, an RNC can instruct the UE to boost its uplink transmit power, remove the UE from soft handover, or disable power control of the UE by the low-power node. To address inter-cell interference, the RNC can limit the UE transmit power and/or enable the victim cell to suppress the interference. Further, a common control channel can be used to power control UEs outside of the convention set of UEs available for power control.08-23-2012
20120076005METHOD AND NODE FOR REALIZING ROUTE DISCOVERY IN NETWORK - A method for realizing route discovery in a network includes: classifying a level of a node in the network; receiving a route request packet from a node adjacent to the node; comparing a node level indicated by node level information contained in the received route request packet with the level of the node; updating, in a case where the level of the node is higher than the node level indicated by the node level information contained in the route request packet, the node level indicated by the node level information contained in the route request packet to be the level of the node; and forwarding the updated route request packet to other nodes adjacent to the node.03-29-2012
20120176916METHOD, APPARATUS AND SYSTEM FOR ESTABLISHING PATH FOR TRANSMITTING WIRELESS SIGNAL - A method, an apparatus, and a system for establishing a path for transmitting a wireless signal are disclosed. The path involves a wired medium that connects an access device and a distributed node, and the method includes: the access device obtains communication performance parameters of the distributed node; the access device determines frequency used to transmit a wireless signal through the wired medium according to the communication performance parameters and a workable spectrum of the access device; and the access device adjusts parameters of the access device according to the determined frequency, and sends a message that carries the frequency to the distributed node so that the distributed node adjusts parameters of the distributed node according to the frequency to establish a path for transmitting a wireless signal in the wired medium.07-12-2012
20120176915METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - A method for controlling uplink transmission power in a wireless communication system is provided. The method includes estimating a downlink path loss, determining a target Signal to Noise Ratio (SNR) depending on the downlink path loss, determining an amount of power to compensate for a difference between the target SNR and an estimated SNR, and transmitting a power control message including a Transmit Power Control (TPC) command value to a terminal based on the determined amount of power.07-12-2012
20120176914QUERYING HEALTH OF FULL-MESHED FORWARDING PLANES - In one embodiment, an originating node in a full-mesh computer network receives a trigger to determine integrity of the full-mesh network's data-paths. The originating node determines an ordered list of nodes in the full-mesh computer network. The originating node then sends echo requests to each non-originating node of the ordered list. The originating node may later receive consolidated echo responses from at least some non-originating nodes to which an echo request was sent. Each consolidated echo response indicates a response from the respective non-originating node, and any responses to subsequent echo requests sent by that particular non-originating node to subsequent nodes. The originating node may then use these responses to determine a connectivity status of the full-mesh computer network.07-12-2012
20100271961Method and Apparatus for Documenting Network Paths - Methods and apparatus for documenting network path connectivity are described that allow a network management system/revision management system (NMS/RMS) to determine what equipment and ports support a network path by interrupting and restoring Power-over-Ethernet (PoE) service on the network path. Upon detecting a loss of PoE service, communication active jacks that support network path connectivity may activate an internal switch that interrupts downstream connectivity. Each communication active jack along the network path may then begin broadcasting a unique message in the upstream direction that is addressed to the NMS/RMS. Upon receiving a unique active jack message, the NMS/RMS may record the information contained within and instruct the communication active jack to reestablish connectivity to the next downstream device. In this manner, as each device along a network path regains connectivity the network path information stored within the NMS/RMS is updated until a complete view of the network path is documented.10-28-2010
20100271959Discovery channel and discovery beacon for peer-to-peer devices in wireless communications network - In a multi-channel wireless communications environment, at least one of the channels may be used for the purpose of allowing devices to discover each other so that they may subsequently communicate with each other on another channel. In some embodiments a special discovery beacon may be used on that channel, which is dedicated to the purpose of allowing the devices to discover each other.10-28-2010
20120218904METHOD AND APPARATUS FOR POWER HEADROOM REPORTING DURING MULTI-CARRIER OPERATION - A method in a wireless communication terminal supports aggregated carrier access. The terminal is configured to transmit a power headroom report of a first type, determine that a condition for transmission of a power headroom report of a second type is satisfied, and transmits a power headroom report of the second type. In other embodiments, essential power headroom reports are prioritized over non-essential power headroom reports.08-30-2012
20120224496METHOD AND SYSTEM FOR AUDIO/VIDEO CONNECTION MAINTENANCE - Embodiments of the invention provide connection maintenance for communication of audio/video (AV) information. One implementation comprises transmitting audio/video (AV) information as multiple spatial streams from a wireless transmitter to at least one wireless receiver over a wireless link, wherein each spatial stream is targeted to one of multiple AV devices connected to the wireless receiver. Receiving the AV information at the wireless receiver and providing the AV information from each spatial stream to a target AV device connected to the wireless receiver via a communication link, wherein each communication link corresponds to a spatial stream. Detecting connection status information for the wireless link and the communication links. Transmitting the connection status information from the wireless receiver to the wireless transmitter.09-06-2012
20120257513DEVICES FOR MULTI-GROUP COMMUNICATIONS - A User Equipment (UE) configured for multi-group communications is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE detects a plurality of cells. The UE also determines to use multiple groups of one or more cells. The UE further determines a primary secondary cell (PSCell) for a non-primary cell (non-PCell) group based on UE-specific radio resource control (RRC) signaling. The UE additionally receives information using the multiple groups.10-11-2012
20120230207EARLY DETECTION OF LOSS OF CONTINUITY IN A MAINTENANCE ASSOCIATION - Systems and methods for early detection of loss of continuity in a maintenance association are provided. A method according to the invention preferably includes periodically transmitting a continuity check message (“CCM”) between two maintenance endpoints on the network. When the receiving maintenance endpoint detects a failure to receive a CCM from the transmitting maintenance endpoint for less than a standards-determined length of time, but greater than a predetermined length of time, the method may include using the receiving maintenance endpoint to implement a protection switching application in order to identify and utilize an alternate pathway for communication between the transmitting maintenance endpoint and the receiving maintenance endpoint.09-13-2012
20080298259Apparatus and methods of determining configurations for handling communication path management traffic - Apparatus and methods of determining configurations for handling communication path management traffic are disclosed. Respective communication path management traffic handling configurations of communication system elements that terminate a communication link, which is a portion of a communication path, are determined. If the respective communication path management traffic handling configurations indicate that the communication system elements have been configured to pass communication path management traffic associated with the communication path toward endpoints of the communication path, then communication path management traffic for managing the communication path is exchanged through the communication link. Indications of a communication path management traffic handling configuration may be exchanged between the communication system elements during establishment of the communication link.12-04-2008
20080298258Information transfer capability discovery apparatus and techniques - Information transfer capability discovery apparatus and techniques are disclosed. A received tracing message for tracing a communication path in a communication system is processed in some embodiments by generating and sending a response to the received tracing message. The tracing message response includes an indication of an information transfer capability of a communication link that comprises the communication path being traced by the tracing message. A further tracing message based on the received tracing message may also be forwarded in the communication system. The further tracing message may be associated with a different domain than the received tracing message in a communication system that includes multiple domains such as maintenance domains. In a multi-domain system, indications of information transfer capability could be included in further tracing messages instead of in responses.12-04-2008
20110038267System and Method for Monitoring the Connectivity of a Path Between Nodes in a Network - A method and system for determining a path between nodes in a network are disclosed. In accordance with an embodiment of the present disclosure, a system for determining a path between nodes in a network comprises a destination node and a link aggregation group (LAG) that includes a first link and a second link. The system further comprises a source node communicatively coupled to the destination node by the LAG where the source node, the LAG and the destination node form a path. The source node is operable to determine a link availability status for each of the first and second links using a layer-2 protection scheme. The source node is further operable to monitor the path for connectivity based on the link availability status using a layer-3 protection scheme.02-17-2011
20110235529METHOD AND ARRANGEMENT IN A COMMUNICATION NETWORK SYSTEM - The present invention relates to a method and a communication network node for enabling automatic optimization of a random access preamble format usage in a communication network system. The network comprises the communication network node serving at least one cell to which user equipments are accessing. A random access preamble format is set for each cell and comprises a random access sequence length, T09-29-2011
20100220601METHOD AND APPARATUS FOR SCHEDULING TRANSMISSIONS IN SPATIAL DIVISION MULTIPLE ACCESS NETWORK SYSTEMS - An apparatus for communications including a processing system configured to generate a plurality of spatial streams for communicating with a plurality of nodes, the processing system being further capable of determining an allocation of the spatial streams to each of the nodes based on at least one metric for each of the nodes.09-02-2010
20120287796SYSTEMS AND METHODS FOR ASSIGNING CUSTOMERS TO GROUPS FOR THE TRANSMISSION OF BROADBAND DATA SIGNALS - Systems and methods are provided for assigning customers to groups for the transmission of broadband data signals. Respective linear impairment information for a plurality of customers of a service provider may be determined. Based at least in part upon an analysis of the determined linear impairment information, each of the plurality of customers may be assigned to one of a plurality of groups. The customers assigned to each of the plurality of groups are associated with similar linear impairments. Additionally, for each of the plurality of groups, one or more frequencies at which communications will be output by the service provider for receipt by the customers assigned to the respective group may be determined.11-15-2012
20130010612Impairment Aware Path Computation Element Method and System - The disclosure includes an apparatus comprising: a path computation element (PCE) comprising a processor configured to: receive a path computation element protocol (PCEP) path computation request from a path computation client (PCC), wherein the path computation request comprises an impairment validation request that directs the PCE to perform an impairment validation of a network path; after receiving the path computation request, compute a network path; and perform an impairment validation of the network path specified by the impairment validation request. In another embodiment, the disclosure includes a method comprising: sending, by a PCC a PCEP path computation request to a PCE, wherein the request directs the PCE to perform routing and wavelength assignment (RWA) and a first impairment validation of a network path, wherein the request comprises a type of signal quality of the network path which indicates the first type of impairment validation to be performed.01-10-2013
20080239971Voip Device Test System and Test Method - An MAC address of each of devices under testing is entered. An IP address is assigned to each entered MAC address. The IP addresses and telephone numbers assigned to the devices and a failure test terminal are associated with one another and registered in a system server. Out of telephones connected to the devices, sets of two telephones are determined. For each set, a call is made from a first telephone connected to the device to a second telephone connected to another device. When the communication is established, a call is made from the called second telephone to the first telephone. If the communication is not established, communication with a telephone connected to the failure test terminal is tried. Thereby, adequate test on a large number of devices with simple operation is possible in performing an operation test on a VoIP device.10-02-2008
20120250527Determining Connectivity Of A High Speed Link That Includes An AC-Coupling Capacitor - Methods, apparatuses, and computer products are provided for determining connectivity of a high speed link that includes an ac-coupling capacitor. Embodiments include transmitting, by a connectivity tester, a test signal on a lane within the high speed link; detecting on the lane, by the connectivity tester, a standing wave generated in response to the transmission of the test signal; determining, by the connectivity tester, whether the standing wave is resonating; if the standing wave is resonating, indicating, by the connectivity tester, that the lane of the high speed link has a closed connection; and if the standing wave is not resonating, indicating, by the connectivity tester, that the lane of the high speed link has an open connection.10-04-2012
20130114418METHODS AND APPARATUS FOR WIRELESS COMMUNICATION - The invention relates to methods, apparatus and computer program products for enabling mobility in a downlink packet access service in a wireless communications network. At a user equipment, packet data is received from a set of one or more serving downlink shared channel cells simultaneously via one or more respective shared downlink channels and a measurement report associated with the downlink packet access service is transmitted to the network. The service is capable of initiating an addition or removal of at least one, or replacement of any, of the serving downlink shared channel cells in the set on the basis of the transmitted measurement report.05-09-2013
20130114419RESOURCE MANAGEMENT FOR ENHANCED PDCCH - Certain aspects of the present disclosure provide techniques for managing resources utilized for enhanced physical downlink control channel (PDCCH) transmissions.05-09-2013
20130100827METHOD FOR MANAGING MOBILE RADIO RESOURCES FOR PACKAGE RECEIVING ENHANCEMENT - A method for managing mobile radio resources for package receiving enhancement is disclosed. comprising the following steps: A mobile device begins monitoring a buffer once the mobile device is in an radio resource control (RRC) connected state. While monitoring, the mobile device checks the state of stacking data packets and the rate at which data packets are being received. An arrival profile for data packets as a function of time is created with this data. A traffic prediction operation is carried out based on the arrival profile (04-25-2013
20130128751MULTI-LAYER NETWORK DIAGNOSTIC TRACING - A network management and monitoring application employs diagnostic messages for confirming network path connectivity and identifying and locating connectivity faults. Diagnostic messages similar to conventional “ping” and “traceroute” messages traverse the network along a prescribed path for which diagnostic feedback is desired. The application receives and analyzes return messages sent from network entities along the path to ascertain connectivity issues on the path. The application receives layer 3 identifiers such as IP addresses, however performs diagnostic operations such as continuity checks based on layer 2 identifiers such as MAC (Media Access Control) identifiers because certain network entities operate on L2 identifiers and would otherwise evade a continuity check based on layer 3 identifiers. The monitoring application therefore performs continuity diagnostics such as ping and traceroute operations using L2 identifiers, therefore pinpointing problems with an L2 network forwarding entity such as a bridge that lies between L3 entities such as routers.05-23-2013
20090129280SOCKET MANAGEMENT FOR ALWAYS-ON DATA CONNECTIONS - A method of automatically keeping sockets open for always-on applications in a GPRS context is provided. Information is maintained by each wireless device identifying each APN (access point name)-port pair associated with a PDP (packet data protocol) context used by an always-on application. Upon the PDP context becoming available after having become unavailable, a socket is registered for each port-APN pair associated with the PDP context.05-21-2009
20100315958METHOD FOR NON-COOPERATIVE MEASUREMENT OF NETWORK DATA-PATH QUALITY - A method and apparatus for measuring network path quality in a non-cooperative manner, which involves sending a probe consisting of a plurality of probe data packets to a remote node and receiving a response consisting of at least one response data packet therefrom. Both the probe and response data packets carry application messages and are exchanged according to normal transmission mechanisms, so that the method can void the reliability problem suffered by methods using non-data probes. The response data packets, at the same time, provide sufficient information for obtaining a rich set of data-path quality metrics in an efficient way.12-16-2010
20130155876Captive Portal State Detection and Avoidance for Multiple-Interface Traffic Offloading - In one embodiment, a mobile device connecting to a Wi-Fi hotspot first performs a connectivity check to determine whether the wireless connection is trapped in the walled garden of a captive portal by transmitting a connectivity check message to one or more external endpoints in the public IP network. If no response is received, the mobile device determines that it is in the captive portal state, and generates a browser window bound to the Wi-Fi state tracker of the mobile device displaying the portal page for the captive portal. In such a manner, the mobile device does not offload any traffic from its wireless cellular interface to its Wi-Fi interface until it is certain the Wi-Fi interface may access the public IP network, thereby preventing data interruption for mobile applications.06-20-2013
20110310748COORDINATOR, WIRELESS NODE AND WIRELESS COMMUNICATION SYSTEM - A wireless communication system provides high reliability wireless communications even when large scale interference affecting the entire system has occurred in ad hoc wireless communication systems. The node, access point, and intermediate nodes are each equipped with multiple wireless standards, and notify a wireless communication control device called a coordinator that sets the network communication paths with communication path information obtained by measuring the state of communication paths in the vicinity of their own respective nodes. The coordinator that now knows the communication status, issues instructions for setting plural routes using multiple wireless standards between the node and the access points as well as which wireless standard to use to implement communications between each intermediate zone, and each intermediate node conveys the measurement data while complying with those instructions.12-22-2011
20130194935CIRCUIT TESTING ARRANGEMENT FOR SERIALISER/DESERIALISER - The present invention relates to a test arrangement for a serdes ip block and in particular provides a serdes test chip comprising a serdes instance to be tested and further instances of said serdes, said further instances constitution a data transfer path for data with which said serdes is to be tested. The data may come from a programmable gate array and enables the testing of data transfer schemes yet to be embodied in an integrated circuit ip block.08-01-2013
20120300645METHOD, APPARATUS AND SYSTEM OF MANAGING AN ENCODER OUTPUT RATE BASED UPON WIRELESS COMMUNICATION LINK FEEDBACK - Machine-readable media, methods, apparatus and system for managing an encoder output rate at least partially based upon wireless communication link feedback are described. In some embodiments, a device driver of the system may generate link information indicating quality of a wireless communication link between the system and another system, wherein the link information is generated at least partially based upon at least one of media access layer (MAC) information and physical layer information of the system. A system managing entity of the system may manage an output rate of an encoder of the system at least partially based upon the link information.11-29-2012
20120087251METHOD, SYSTEM AND NETWORK DEVICE FOR NODE CONFIGURATION AND PATH DETECTION - A method, system, and network device for node configuration and path detection are provided. The method for path detection includes: receiving a path detection message, and writing path state information of a present node into the path detection message; forwarding the path detection message, into which the path state information of the present node has been written, to downstream nodes according to a forwarding manner for a multicast data stream. The method for path detection is capable of improving the acquisition efficiency for multicast paths and saving network bandwidth.04-12-2012

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