Patent application number | Description | Published |
20080200181 | Self-Configuring Wireless Network Location System - Wireless adapters are installed on one or more general purpose computing devices and are connected via a network in an enterprise environment. The adapters are densely deployed at known locations throughout the environment and are configured as air monitors. The air monitors monitor signals transmitted by one or more transceiver devices and records information about these signals. One or more analysis or inference engines may be deployed to obtain the recorded signal information and the air monitor locations to determine a location of the one or more wireless transceivers devices deployed in the environment. | 08-21-2008 |
20080201109 | Wireless Performance Analysis System - Wireless adapters are installed on one or more general purpose computing devices and are connected via a wireless network in an enterprise environment. The adapters are densely deployed at known locations throughout the environment and are configured as air monitors. The air monitors monitor wireless signals transmitted between transceiver devices and access points and records information about these signals. One or more analysis or inference engines may be deployed to analyze the signals received from the air monitors to obtain optimum performance and connectivity information about the wireless network. | 08-21-2008 |
20080316982 | Managing Dense Wireless Access Point Infrastructures in Wireless Local Area Networks - Techniques for enhancing the throughput capacity available to client devices connected to a wireless local area network (WLAN) are described. Specifically, existing WLAN resources are converted into wireless access points (APs) to create a dense infrastructure of wireless APs. To leverage this dense AP infrastructure, central management techniques are employed. With client-to-AP mapping, these techniques are used to prevent the discovery of multiple APs in a WLAN by a client device and to select a single AP (using certain policies) to associate with the client device and provide it with an enhanced wireless connection to the WLAN. Additionally, techniques are employed to centrally determine, using central policies, when the AP should disassociate from the client device and when another centrally selected AP should respond to, and associate with, the client device to provide it with an enhanced wireless connection to the WLAN—without interrupting/disrupting the client device's access. | 12-25-2008 |
20080320108 | Management Policies For Dense Wireless Access Point Infrastructures in Wireless Local Area Networks - Techniques for enhancing the throughput capacity available to client devices connected to a wireless local area network (WLAN) are described. Specifically, existing WLAN resources are converted into wireless access points (APs) to create a dense infrastructure of wireless APs. To leverage this dense AP infrastructure, central management techniques are employed. With client-to-AP mapping, these techniques are used to prevent the discovery of multiple APs in a WLAN by a client device and to select a single AP (using certain policies) to associate with the client device and provide it with an enhanced wireless connection to the WLAN. Additionally, techniques are employed to centrally determine, using certain policies, when the AP should disassociate from the client device and when another centrally selected AP should respond to, and associate with, the client device to provide it with an enhanced wireless connection to the WLAN—without interrupting/disrupting the client device's access. | 12-25-2008 |
20090103506 | Separating Control and Data in Wireless Networks - Wireless communication techniques are described in which control and data are separated. In an implementation, a method is described which includes sending data packets on a first wireless channel and sending control data relating to the data packets on a second wireless channel having a data rate that is lower than a data rate of the first wireless channel. | 04-23-2009 |
20090122700 | Spectrum and medium access allocation for fairness - Each node or link of an ad hoc network assists in the distributed allocation of a data channel to increase fairness, even in a multi-hop network, by tracking a measure of link weight for itself and sharing this information over a control channel with neighboring nodes. The metric can be provided over a dedicated control channel, added as a header to data communication on a data channel, or inferred by monitoring data traffic from the neighboring node. The link weight can be adjusted by a link quality factor based on provided or inferred metrics such as transmission rates, ratio of transmission errors, idle time, etc. For multiple flow queues at a subject node, one with a higher transmission rate can be selected for increased fairness. When a packet is received, medium access includes allocating bandwidth, including bonding multiple frequencies that are determined to be available to both nodes. | 05-14-2009 |
20090124205 | PHYSICAL AND MAC ADAPTATION FOR INTERFERENCE MITIGATION WITH COGNITIVE RADIO - A communication device cognitively monitors interference signals across a communication band so that adaptations for physical and medium access control (MAC) of data packet transmissions are appropriate for a particular interference signal. Characteristics of an interference signal of interest (e.g., bandwidth, power and/or duration relative to an average data packet transmitted over a communication channel of the communication device) are sensed for an appropriate adaptation (e.g., forward error correction, modulation technique, back off, request to send/clear to send protocol, etc.). Patterns for known types of interference sources can be compared so that when recognized an associated adaptation can be used. | 05-14-2009 |
20090209349 | PREDICTION OF NETWORK PATH QUALITY AMONG PEER NETWORKING DEVICES - The claimed subject matter provides a system and/or a method that facilitates connectivity within a peer-to-peer networking environment. A client can transmit a request to connect with a host for peer-to-peer networking. A server can generate a list that includes at least one host that matches the request from the client. A predictor engine can reduce the list by at least one matched host based upon a predictor, wherein the predictor is at least one of an Internet Protocol history predictor, a prefix history predictor, or a geography predictor. | 08-20-2009 |
20100027419 | INVERSE MULTIPLEXING HETEROGENEOUS WIRELESS LINKS FOR HIGH-PERFORMANCE VEHICULAR CONNECTIVITY - Systems and methods are provided that enable high-performance Internet access on board moving vehicles. In an illustrative implementation, an exemplary wireless data communications environment comprises a PluriBus module, an instruction set comprising at least one instruction set to process data for wireless communication between a cooperating component onboard a moving vehicle and other cooperating wireless components, and one or more multiple wide-area wireless communications links. In an illustrative operation, the PluriBus module can perform one more wireless communications techniques comprising opportunistic erasure coding such that coded packets can be sent in the event that there are openings in the one or more wireless communication links' capacity and transmitting the data packets along the one or more wireless communications links that is estimated (e.g., in real time) to offer efficient delivery of data packets. | 02-04-2010 |
20100027563 | EVOLUTION CODES (OPPORTUNISTIC ERASURE CODING) PLATFORM - Systems and methods are provided that allow for the opportunistic erasure coding of data packets by employing an exemplary evolution code. In an illustrative implementation an exemplary computing environment comprises an evolution code engine and an instruction set comprising at least one instruction to instruct the evolution code to process data for communication between two or more components of the exemplary computing environment. The use of evolution coding mitigates packet losses along one or more communication paths. In an illustrative operation, coded packets are created by XOR-ing data packets together such that a coded packet can recover a lost data packet using other received packets. | 02-04-2010 |
20110087799 | Flyways in Data Centers - Described is a technology by which additional network communications capacity is provided to an oversubscribed base network where needed, through the use of dynamically provisioned communications links referred to as flyways. A controller detects a need for additional network communications capacity between two network machines, e.g., between two racks of servers with top-of-rack switches. The controller configures flyway mechanisms (e.g., one per rack) to carry at least some of the network traffic between the machines of the racks and thereby provide the additional network communications capacity. The flyway mechanisms may be based on any wireless or wired technologies, including 60 GHz technology, optical links, 802.11n or wired commodity switches. | 04-14-2011 |
20110087924 | Diagnosing Abnormalities Without Application-Specific Knowledge - Methods, articles, and systems for determining a probable cause of a component's abnormal behavior are described. To determine the probable cause, a computing device computes, for one or more pairs of components having dependency relationships, a likelihood that behavior of one component of a pair is impacting behavior of the other component of the pair. This computing is based on joint historical behavior of the pair of components. The computing device then determines that one of a plurality of components is a probable cause of the abnormal behavior based on the computed likelihoods. | 04-14-2011 |
20110211517 | EFFICIENT AND RELIABLE MULTICAST OVER A Wi-Fi NETWORK - A “Wi-Fi Multicaster” provides a practical and efficient Wi-Fi multicast system for environments having potentially large numbers of Wi-Fi clients. Significantly, the Wi-Fi Multicaster does not require any changes to the 802.11 protocol, or to the underlying Wi-Fi infrastructure. In various embodiments, the Wi-Fi Multicaster uses pseudo-broadcast, and augments it with destination control, association control and optional proactive FEC (forward error correction) to improve multicast performance. More specifically, the Wi-Fi Multicaster system converts multicast packets to targeted unicast transmissions. To minimize the amount of airtime consumed, the Wi-Fi Multicaster uses destination control in combination with various algorithms for association control. Further, in various embodiments, the Wi-Fi Multicaster includes an adaptive, proactive FEC scheme to reduce overall packet losses. Finally, to overcome the challenges posed by encryption protocols such as 802.1x, the Wi-Fi Multicaster uses a “virtual multicast interface” that allows clients to “share” a common key for each multicast. | 09-01-2011 |
20110271345 | DETECTION OF ROGUE WIRELESS DEVICES FROM DYNAMIC HOST CONTROL PROTOCOL REQUESTS - A method to determine if a rogue device is connected to a specific wired network from dynamic host control protocol (DHCP) requests on the wired network. These DHCP requests are analyzed to determine the type of device issuing the request. Once the type of device has been determined, it can be checked against a list of authorized device types. If the device issuing the DHCP request is not an authorized device type, then it can be determined that the suspect device is a rogue that is connected to the specific wired network. Additionally, even if the system of the present invention determines that it is an authorized device type, if the device is not one of the few authorized devices of this type, e.g. because its MAC address is not recognized as that of one of the authorized devices, the system can flag the suspect as a rogue. | 11-03-2011 |
20120014313 | OPPORTUNISTIC USE OF WIRELESS NETWORK STATIONS AS REPEATERS - Implementation of opportunistic use of stations in a wireless network as repeaters is described. In one implementation, a station detects the existence of rate anomaly in a wireless network. In response to the rate anomaly, the station may transform into a software repeater for certain other neighboring stations. The repeater function allows for the relaying of packets sent by these neighboring stations to the access point and vice versa. The other neighboring stations, owing to their relative proximity to the repeater station, transmit data at a higher rate to the repeater station. Thus, the removal of the slower stations reduces clogging of the access point and increases the overall data rate within the wireless network. Further, a zero-overhead network coding protocol may be implemented in conjunction with the repeater function to increase capacity of the wireless network. | 01-19-2012 |
20120117404 | Decentralized Sleep Management - Techniques for employing a decentralized sleep management service are described herein. In some instances, each computing device of a group of computing devices periodically shares information about itself with each other computing device of the group. With this information, each computing device within the group that is awake and capable of managing other devices selects a subset of devices to probe. The devices then probe this subset to determine whether the probed devices are asleep. In response to identifying a sleeping device, the probing device takes over management of the sleeping device. Managing the sleeping device involves informing other devices of the group that the sleeping device is being managed, in addition to monitoring requests for services on the sleeping device. In response to receiving a valid request for a service hosted by the sleeping device, the managing device awakens the sleeping device and ceases managing the now-woken device. | 05-10-2012 |
20120324228 | PLATFORM THAT FACILITATES PRESERVATION OF USER PRIVACY - Described herein are technologies pertaining to preserving privacy of users of mobile computing devices. Two users of two mobile computing devices share a quantization scheme for quantizing location data using a predefined quantization interval. The two users additionally share a private key that is utilized to encrypt locations obtained by the two computing devices that have been quantized using the shared quantization scheme. Encrypted, quantized locations are compared in a cloud computing service in connection with answering location-based queries, where the comparison is undertaken without the cloud computing service decrypting the encrypted, quantized locations. | 12-20-2012 |
20140380282 | MONITORING MOBILE APPLICATION PERFORMANCE - Aspects of the subject disclosure are directed towards monitoring application performance during actual use, particularly mobile application performance. Described is instrumenting mobile application binaries to automatically identify a critical path in user transactions, including across asynchronous-call boundaries. Trace data is logged by the instrumented application to capture UI manipulations, thread execution, asynchronous calls and callbacks, UI updates and/or thread synchronization. The trace data is analyzed to assist developers in improving application performance. | 12-25-2014 |