Patent application number | Description | Published |
20090247172 | LOW REUSE PREAMBLE FOR A WIRELESS COMMUNICATION NETWORK - Techniques for sending low reuse preambles in a wireless network are described. In an aspect, a base station may send a low reuse preamble on reserved frequency resources to allow terminals to detect the base station even in the presence of strong interfering base stations. The base station may generate the low reuse preamble to include a pilot portion and a data portion. The base station may determine frequency resources reserved for sending low reuse preambles by base stations. The base station may then send the low reuse preamble on the reserved frequency resources, e.g., at a pseudo-randomly selected time. A terminal may detect for low reuse preambles sent by the base stations on the reserved frequency resources. The terminal may recover information for a base station from a detected low reuse preamble. | 10-01-2009 |
20100034186 | PEAK-TO-AVERAGE POWER RATIO (PAPR) REDUCTION SCHEME FOR WIRELESS COMMUNICATION - Techniques for sending a transmission in a manner to reduce peak-to-average power ratio (PAPR) of the transmission are described. A transmitter may select phases for a plurality of resource blocks based on a metric, e.g., PAPR. The transmitter may apply the selected phases to modulation symbols to be sent on the resource blocks. In one design, the transmitter may select one phase for each resource block and may apply the phase to all modulation symbols to be sent on the resource block. In another design, the transmitter may select multiple phases for multiple spatial layers in each resource block, one phase for each spatial layer. The transmitter may then apply each phase to all modulation symbols to be sent on one spatial layer in one resource block. For both designs, the transmitter may generate at least one OFDM symbol or at least one SC-FDMA symbol based on the modulation symbols after applying the selected phases. | 02-11-2010 |
20100184380 | MITIGATING INTERCARRIER AND INTERSYMBOL INTERFERENCE IN ASYNCHRONOUS WIRELESS COMMUNICATIONS - Systems and methodologies are described that facilitate mitigating intercarrier and intersymbol interference in symbol transmissions over wireless communications where transmitter and receiver may not be time synchronized. Symbol periods can be extended for transmitting symbols such that an original symbol can be transmitted with one or more duplicated symbols keeping phase continuous, blank symbols, and/or the like. In this regard, multiple receiver windows can be required to receive the symbol such that at least one window has a non-interfered symbol even though timing can be misaligned (e.g., in asynchronous communications channels). Alternatively, the receiver windows can be divided to allow similar receipt of symbols over multiple windows such that one window has a non-interfered symbol. Also, timing misalignment that leads to phase ramping in frequency is accounted for to allow proper demodulation of the symbol. | 07-22-2010 |
20110026574 | SIGNAL AND NOISE POWER ESTIMATION - Techniques for estimating desired signal power and noise power of a signal received over a communications channel. In an aspect, a pilot autocorrelation matrix is derived based on certain assumptions about the time delay profile, Doppler profile, and/or spatial correlation of the channel. The pilot autocorrelation matrix is decomposed into a set of eigenvectors. From the eigenvector decomposition, a set of dominant eigenvectors is selected to estimate the signal power, while a set of non-dominant eigenvectors is selected to estimate the noise power. The techniques may readily be applied to arbitrary pilot patterns and to a wide array of SNR ranges and channel conditions. | 02-03-2011 |
20110038445 | COMMUNICATIONS CHANNEL ESTIMATION - Techniques for estimating the response of a communications channel. In an aspect, a channel autocorrelation matrix is derived based on, e.g., certain assumptions about the time delay profile, Doppler profile. An eigenvector decomposition is performed on the autocorrelation matrix, and a set of dominant eigenvectors is determined. A received pilot signal vector is projected onto a projection matrix derived from the dominant eigenvectors to generate a set of eigen-coefficients, which is then used to reconstruct an estimated channel vector. In an exemplary embodiment, the eigenvector-based approach is combined with a simplified minimum mean-square error based approach to generate an estimated channel vector when the received signal-to-noise ratio is below a threshold. | 02-17-2011 |
20110319084 | METHOD AND APPARATUS FOR MITIGATING INTERFERENCE IN FEMTOCELL DEPLOYMENTS - Methods and apparatuses are provided for mitigating interference among access points, and/or devices communicating therewith, in unplanned network deployments. Based on determining that one or more served devices potentially interfere with one or more access points, an inter-frequency handover (IFHO) threshold or data rate can be adjusted for the device to cause IFHO or reduce occurrence of interference, and/or a coverage area can be modified so the device can communicate with one or more other access points to mitigate potential interference. Based on determining interference from one or more devices served by other access points, an access point can switch operating modes to a hybrid or open access point to allow the one or more devices to handover to the access point, and/or can boost downlink transmit power to cause the one or more devices to perform IFHO from the other access points to mitigate potential interference. | 12-29-2011 |
20110319088 | METHOD AND APPARATUS FOR MITIGATING INTERFERENCE IN FEMTOCELL DEPLOYMENTS - Methods and apparatuses are provided for determining one or more parameters of an access point that can be set or adjusted to mitigate interference to other access points. A rise-over-thermal (RoT) threshold can be set at an access point based on one or more parameters, such as pathloss measurements, location of the access point, etc., such that interference from devices communicating with the access point can be mitigated. In addition, a noise floor, RoT threshold, etc., can be adjusted based on determining a transmit power difference, out-of-cell interference, and/or similar measurements. | 12-29-2011 |
20110319122 | METHOD AND APPARATUS FOR DEVICE TRANSMIT POWER CAPPING IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided for determining a transmission power cap for one or more devices based at least in part on pathloss measurements to one or more access points received from the one or more devices. A common transmission power cap can also be computed for assigning to devices communicating with an access point, and the transmission power cap for a given device can be adjusted when the transmission power is at or a threshold level from the common power cap to conserve signaling in the wireless network. Adjustment of the transmission power cap can additionally or alternatively be based on a received power at an access point related to signals from the device, an interference report from one or more access points, and/or the like. | 12-29-2011 |
20120021788 | METHOD AND APPARATUS FOR HANDOVER OF DEVICE TO MITIGATE UPLINK INTERFERENCE IN FEMTOCELL DEPLOYMENTS - Methods and apparatuses are provided for determining whether to handover a device to mitigate uplink interference while achieving acceptable uplink service quality in a wireless network. One or more parameters related to a device can be evaluated to determine whether to handover the device, such as a number of transmission power reports received from the device over a period of time, a frame error rate, setpoint, or power control commands related to the uplink of the device, a received pilot signal strength at the device, an uplink throughput or buffer size at the device, etc., from which transmit power information of the device can be inferred for determining whether the device potentially interferes with access points or devices. Based on the one or more parameters, an access point can determine whether handing over the device may mitigate such uplink interference while ensuring uplink service quality, and accordingly handover the device. | 01-26-2012 |
20120122492 | METHOD AND APPARATUS FOR UPDATING FEMTOCELL PROXIMITY INFORMATION - Techniques are described herein for updating proximity information associated with a femtocell in a wireless communication system. An example of a method described herein includes identifying a location within a wireless communication network, associating the location with a femtocell for which proximity information relating to position of the femtocell is maintained, performing at least one search for the femtocell, and updating the proximity information maintained for the femtocell based on results of the at least one search. Another example of a method described herein includes obtaining a report of proximity information relating to a femtocell, identifying one or more network devices for which the proximity information is relevant, and communicating proximity information update signaling to the one or more network devices. | 05-17-2012 |
20120124263 | ALLOCATING GRANT CHANNEL RESOURCES - Grant channel resources are allocated based on the number of access terminals that use different types of transmission time intervals (TTIs) for data transmissions. For example, if the number of access terminals using a first type of TTI exceeds the number of access terminals using a second type of TTI, more grant channel resources are allocated to the access terminals that use the first type of TTI. | 05-17-2012 |
20120309394 | APPARATUS AND METHODS FOR HAND-IN TO A FEMTO NODE - Methods and apparatuses are provided for causing active hand-in of a device from a macrocell base station to a femto node, which can be an inter-frequency hand-in. The femto node can broadcast a beacon, which can be received and reported by a device to a source base station along with one or more parameters for disambiguating a target femto node. The source base station can communicate a handover message to the femto node or a related femto gateway along with the one or more parameters. The femto node or femto gateway can disambiguate the intended target femto node based in part on the one or more parameters, which can include applying one or more filters. Additionally, the femto node can broadcast multiple beacons to assist in disambiguation of the target femto node. Also, where complete disambiguation is not possible, the femto gateway can prepare multiple femto nodes for hand-in. | 12-06-2012 |
20120322494 | MANAGEMENT OF HIGH-SPEED DEDICATED PHYSICAL CONTROL CHANNEL DECODING IN SOFT HANDOVER - Methods for management of high-speed dedicated physical control channel decoding in soft handover procedures include various methods that include controlling reverse link transmission power. Different algorithms may be used for controlling transmission power, including algorithms summarized as determining path-loss differences, determining a difference between pilot channel power from HSDPA serving and non-serving NodeBs, and adjusting a signal-to-interference target, an attenuation factor, or similar parameters for controlling reverse link power. Another of the management methods includes selecting a HSDPA serving NodeB for a mobile entity jointly based on the downlink and uplink channel quality, loading, and resource availability. The methods, and aspects of the methods, may be embodied in wireless communications apparatus, for example, in a NodeB or mobile entity. | 12-20-2012 |
20130094374 | METHOD AND APPARATUS FOR VIRTUAL ADAPTIVE UPLINK ATTENUATION - Techniques are provided for overcoming uplink (UL) interference at a femtocell or the like by modifying the estimated interference-plus-noise power in UL power control. In one example, the modification can be specified by a method, operable by a network entity, that may involve determining a level of excess received interference based at least in part on out-of-cell interference (Ioc). In another example, the modification can be specified by a method, operable by a network entity, that may involve determining a difference between the downlink transmit powers of the high-speed downlink packet access (HSDPA) serving and non-serving cells, with which the UE are in soft handover (SHO) in uplink and is served by the HSDPA serving cell in downlink. | 04-18-2013 |
20130102309 | METHOD AND APPARATUS FOR CALIBRATING TRANSMIT POWER OF A FEMTO NODE - Methods and apparatuses are provided that include calibrating transmit power of a femto node based on measuring one or more parameters related to usage of the femto node. The femto node can temporarily increase transmit power and analyze received measurement reports to determine a transmit power calibration. The femto node can additionally measure uplink received signal strength indicators over multiple time periods following handover of a user equipment (UE) to determine whether to increase transmit power to cover the UE. | 04-25-2013 |
20130157671 | METHOD AND APPARATUS FOR COMPUTING A SCHEDULED LOAD IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided for adjusting a scheduled load for one or more user equipment (UE) in a wireless network. A comparison of each of one or more control parameters related to signals received from one or more UEs to a corresponding threshold can be determined. The control parameters can correspond to an in-cell load, rise-over-thermal, etc. The scheduled load of a base station can be adjusted based in part on the comparison. This adjustment can include adjusting the scheduled load by a step-size increase value or step-size decrease value, which can be computed based in part on a target tail probability for the one or more control parameters. | 06-20-2013 |
20130242943 | TRANSMITTING INDICATION OF ACCESS POINT LOADING - An access point is identified for providing service for an access terminal. In some aspects, the identification of an access point is based on loading at one or more access points. In some implementations, an access terminal selects a cell (e.g., the cell that provides maximum throughput) based on the cell load at one or more cells. In some implementations, load estimation is based on information acquired by an access terminal from nearby access points. | 09-19-2013 |
20130242966 | INITIATING ACCESS TERMINAL COMMUNICATION BASED ON ACCESS POINT LOADING - An access point is identified for providing service for an access terminal. In some aspects, the identification of an access point is based on loading at one or more access points. In some implementations, an access terminal selects a cell (e.g., the cell that provides maximum throughput) based on the cell load at one or more cells. In some implementations, load estimation is based on information acquired by an access terminal from nearby access points. | 09-19-2013 |
20140018076 | METHOD AND APPARATUS FOR BLOCKING HIGH MOBILITY USERS IN WIRELESS NETWORKS - Systems and methods are provided for reporting high mobility user equipment (UE) in a wireless network. This may be achieved, for example, by detecting a high mobility UE at a network node and reporting the high mobility UE in a blocking message to one or more other network nodes. | 01-16-2014 |
20140071891 | METHOD AND APPARATUS FOR PHYSICAL CELL IDENTIFIER COLLISION DETECTION AND NEIGHBORING CELL LIST CONSTRUCTION - System, apparatus, and methods are provided for preventing the collision of physical cell identifiers. A network entity broadcasts via a first radio technology a physical cell identifier of a second radio technology, where the first and second radio technologies are co-located in the network entity. The network entity receives from a neighboring network entity another physical cell identifier of the second radio technology used by the neighboring network entity, where the neighboring network entity broadcasts the another physical cell identifier via the first radio technology, and where the first and second radio technologies are co-located in the neighboring network entity. The network entity changes the physical cell identifier, in response to the physical cell identifier being the same as the another physical cell identifier. | 03-13-2014 |
20140073317 | UE-ASSISTED NETWORK OPTIMIZATION METHODS - A UE or mobile entity in a wireless communication may assist network optimization by determining a location uncovered by a wireless network, generate a coverage hole detected message if one or more conditions associated with the uncovered location are satisfied, and determining a time to transmit the coverage hole detected message to a covered wireless network. The covered network may act on the message to add covered in a second network so that the second network covers the UE. In other aspects, a UE or mobile entity may detect cell congestion in a first cell and assist the network in offloading congestion from the congested cell. In other aspects, a UE or mobile entity may detect backhaul congestion on a first cell, and assist in offloading backhaul communication for the first cell via a second cell. | 03-13-2014 |
20140106740 | BLIND AND TRAFFIC DEMAND BASED CONFIGURATIONS OF COMPRESSED MODE FOR INTER-FREQUENCY FEMTOCELL SEARCH - Techniques are provided for femtocell search using blind and traffic demand-based configurations for compressed mode. For example, a method includes configuring a type-1 cluster of transmission gaps for a mobile entity. The method may include receiving, during one transmission gap of the type-1 cluster of transmission gaps, signal measurements of the second network node from the mobile entity. The method may include configuring a type-2 cluster of transmission gaps for the mobile entity in response to receiving the signal measurements of the second network node. | 04-17-2014 |
20140112169 | USER ADMISSION FOR CO-EXISTENCE WIRELESS SYSTEMS - Techniques for admitting user equipments (UEs) to wireless systems are disclosed. UEs may be assigned priorities for admission to a given wireless system. The UEs may then be admitted to the wireless system based on the priorities of the UEs for the wireless system. In one design, a UE may be identified for admission to a first wireless system among a plurality of wireless systems. Attributes (e.g., capabilities) of the UE for the plurality of wireless systems may be determined. An admission priority of the UE for the first wireless system may be determined based on the attributes of the UE for the plurality of wireless systems. Whether to admit the UE to the first wireless system may be determined based on the admission priority of the UE for the first wireless system and possibly the current resource usage of the first wireless system. | 04-24-2014 |
20140112170 | BROADCAST OF INFORMATION TO ASSIST SYSTEM SELECTION BY USER EQUIPMENTS - Techniques for supporting system selection by user equipments (UEs) are disclosed. In one design, a UE may receive an indication that a first wireless system supports system selection by UEs. The UE may be within the coverage of a plurality of wireless systems, which may include the first wireless system. The UE may receive system selection information from at least one of the plurality of wireless systems. The system selection information may convey system loading, UE performance, system recommendation, etc. The UE may determine performance metrics for the plurality of wireless systems based on the system selection information. The UE may then select one wireless system among the plurality of wireless systems based on the performance metrics for the plurality of wireless systems and the indication that the first wireless system supports system selection by UEs. | 04-24-2014 |
20140112306 | PRIORITIZATION OF USERS FOR SWITCHING BETWEEN CO-EXISTENCE WIRELESS SYSTEMS - Techniques for prioritizing user equipments (UEs) for switching between wireless systems are disclosed. The wireless systems may be part of a small cell and may include a WLAN system and a cellular system. In one design, a network entity (e.g., the small cell) may identify a plurality of UEs communicating with a first wireless system. The first wireless system may be one of a plurality of wireless systems providing communication coverage for the UEs. The network entity may determine priorities of the UEs for switching from the first wireless system to a second wireless system. The network entity may then select at least one UE among the plurality of UEs to switch from the first wireless system to the second wireless system based on the priorities of the UEs. | 04-24-2014 |
20140113590 | INTER-SYSTEM CALL SWITCHING BETWEEN CO-EXISTENCE WIRELESS SYSTEMS - Techniques for switching a user equipment (UE) between wireless systems by first establishing a connection with a target system before disconnecting from a serving system are disclosed. In one design, the UE may initially communicate with a first wireless system (e.g., a WLAN system) of a first radio technology. The UE may receive a page to establish a connection with a second wireless system (e.g., a cellular system) of a second radio technology. The first and second wireless systems may be part of a small cell. The page may be sent by the second wireless system to the UE in response to a decision by a network entity to switch the UE from the first wireless system to the second wireless system. The UE may establish a connection with the second wireless system in response to the page and may thereafter terminate communication with the first wireless system. | 04-24-2014 |
20140113628 | NETWORK DIRECTED SYSTEM SELECTION USING WIRELESS DEVICE INPUT - Methods, systems, and devices are described for network directed system selection. A wireless device may identify a trigger associated with system selection by a network device for the wireless device. The wireless device may identify system selection data for use by the network device in performing a network directed system selection decision for the wireless device. The system selection data may include an indication of one or more networks through which the wireless device has verified that data access is available to the wireless device. The system selection data may be transmitted from the wireless device to a first network for use by the network device. The system selection data may be transmitted in response to the identified trigger. | 04-24-2014 |
20140113631 | SWITCHING OF USERS BETWEEN CO-EXISTENCE WIRELESS SYSTEMS - Techniques for switching user equipments (UEs) between wireless systems are disclosed. A UE may be located within the coverage of a plurality of wireless systems and may communicate with a first wireless system among the plurality of wireless systems. The plurality of wireless systems may include a WLAN system and a cellular system and/or may be part of a small cell. Metrics of the UE for the plurality of wireless systems may be determined. The metrics may be related to one or more of efficiency, service charge, service subscription, application type, or buffer size. Whether to switch the UE from the first wireless system to another wireless system may be determined based on the metrics. In one design, switching priorities of the UE for the plurality of wireless systems may be determined based on the metrics and may be used to determine whether to switch the UE. | 04-24-2014 |
20140119357 | SYSTEMS AND METHODS FOR SYNCHRONIZATION OF WIRELESS DEVICES IN A PEER-TO-PEER NETWORK - Methods, devices, and computer program products for synchronization of wireless devices in a peer-to-peer network are described herein. In one aspect, a method for synchronizing a wireless communication apparatus is provided. The method includes receiving, at the wireless communication apparatus, one or more messages including one or more received time values. The method further includes updating a time value of a clock signal of the wireless communication apparatus to a value derived from the received time values in response to determining that a magnitude of a difference between the time value and the derived time value is greater than a threshold. | 05-01-2014 |
20140126471 | SYSTEM AND METHOD FOR TUNING MEDIUM ACCESS PARAMETERS - Systems and methods for tuning media access parameters are disclosed. In one aspect an access point includes a receiver configured to receive at least one message from a second access point. The access point further includes a processor configured to coordinate with the second access point to select a value of a medium access parameter comprising one of a carrier sense threshold and an energy detection threshold for a wireless station. The processor may generate a message identifying the value of the medium access parameter and may further comprise a transmitter connected to the processor and configured to transmit the message to the station. | 05-08-2014 |
20140126580 | METHOD, DEVICE, AND APPARATUS FOR ERROR DETECTION AND CORRECTION IN WIRELESS COMMUNICATIONS - Systems and methods for communicating in a wireless communication system are described. Various processes for detecting and correcting communication errors described. In aspect a method in a wireless communication system is provided. The method includes transmitting a first packet from a sending device to a receiving device. The method further includes listening for an acknowledgement during a first time period. The method further includes transmitting a second packet to the receiving device after a second time period, when an acknowledgement is not received during the first time period. The second packet includes one or more error-correction codes operable to recover the first packet. | 05-08-2014 |
20140128066 | SYSTEMS AND METHODS FOR IMPROVED ASSOCIATION IN WIRELESS NETWORKS - Systems, methods, and devices for communicating in a wireless network are provided. In some aspects, an access point may comprise a receiver configured to receive an access request message from a wireless station, the message comprising an indication of a plurality of network connection available to the wireless station including a link to a second access point. The receiver may be further configured to receive connectivity information associated with the link, based on the indication, from the second access point. The access point may further comprise a processor configured to determine whether to grant access to the wireless station based, at least in part, on the indication and the connectivity information, and a transmitter configured to transmit a response to the wireless station based on the determining. | 05-08-2014 |
20140153421 | SYSTEMS AND METHODS FOR OPTIMIZATION OF BRANCH SYNCHRONIZATION NODE DETERMINATION IN A PEER-TO-PEER NETWORK - Methods, devices, and computer program products for optimization of branch synchronization node determination in a peer-to-peer network are disclosed herein. In one aspect, a higher-level node, such as a root node broadcasting master clock synchronization messages to other devices, may determine a dynamic signal strength threshold and send it in those synchronization messages. After receiving those messages, if finding the received signal strength of those messages is below the dynamic signal threshold, a receiving node will realize that it is relatively far away from the root node and hence may be a potential branch node to further relay those messages. This dynamic threshold may be determined to ensure that at least a certain percentage of receiving nodes are potential branch nodes, based on the received signal strengths of those nodes at the root node. This method can reduce device energy consumption by only requiring edge devices to relay the synchronization messages, and they can be dynamically identified based on the threshold. In addition, a branch node can also use the dynamic signal strength threshold to help the determination of its potential next-hop branch nodes. | 06-05-2014 |
20140153440 | SYSTEMS AND METHODS FOR SYNCRHONIZATION OF WIRELESS DEVICES IN AN AD-HOC NETWORK - Methods, devices, and computer program products for synchronization of wireless devices in an ad-hoc network are described herein. In one aspect, a method for synchronizing a wireless communication apparatus is provided. The method includes generating, at a wireless communication apparatus, one or more messages identifying a second device to generate prospective synchronization messages. In some aspects, the second device is a back-up root device. The method further includes transmitting a synchronization message. In one aspect, a root device for an ad-hoc network is responsible for generating synchronization messages for nodes of the ad-hoc network. The root device also generates and transmits a message which identifies a back-up root device. The back-up root device may assume responsibility for generating synchronization messages for the ad-hoc network in the event that the wireless communication apparatus no longer generates synchronization messages for the ad-hoc network. In an embodiment, the generated message identifying the back-up root device is included in a synchronization message. | 06-05-2014 |
20140153444 | SYSTEMS AND METHODS OF SELECTIVE SCANNING FOR AD-HOC NETWORKS - Methods, devices, and computer program products for selective scanning of ad-hoc networks are described herein. In one aspect, a method includes receiving a message identifying a number of times the message has been forwarded. The method further includes selectively scanning for other ad-hoc networks based on the identified number. In one aspect, a root device for an ad-hoc network is responsible for generating synchronization messages for nodes of the ad-hoc network. The synchronization message includes a count of the number of times the synchronization message has been forwarded. When the hop count reaches a limit, the synchronization message is no longer retransmitted or forwarded by receiving nodes. Nodes receiving this message may recognize they are positioned near the edge of the ad-hoc network. In at least one embodiment, these nodes may selectively scan for other ad-hoc networks based on the hop count reaching or exceeding a predetermined threshold. | 06-05-2014 |
20140153560 | SYSTEMS AND METHODS FOR OPTIMIZATION OF SYNCRHONIZATION MESSAGE TRANSMISSION INTERVALS IN A PEER-TO-PEER NETWORK - Methods, devices, and computer program products for optimization of synchronization message transmission intervals in a peer-to-peer network are described herein. In one aspect, a method for determining an optimized timing for synchronization messages is provided. The method includes receiving clock drift information from other devices on the peer-to-peer wireless communication network. This clock drift information may be used to determine the frequency with which new synchronization messages must be sent in order to keep synchronization error under a certain requirement at other devices, while minimizing the network traffic due to the transmissions of synchronization messages. | 06-05-2014 |
20140161073 | METHOD AND APPARATUS FOR MITIGATING INTERFERENCE IN FEMTOCELL DEPLOYMENTS - Methods and apparatuses are provided for determining one or more parameters of an access point that can be set or adjusted to mitigate interference to other access points. A rise-over-thermal (RoT) threshold can be set at an access point based on one or more parameters, such as pathloss measurements, location of the access point, etc., such that interference from devices communicating with the access point can be mitigated. In addition, a noise floor, RoT threshold, etc., can be adjusted based on determining a transmit power difference, out-of-cell interference, and/or similar measurements. | 06-12-2014 |
20140198642 | SYSTEMS AND METHODS FOR MODIFYING CARRIER SENSE MULTIPLE ACCESS (CSMA) FOR DENSE NETWORKS - In one aspect, a method of communicating via a wireless medium by a wireless communications apparatus within a network is provided. The method includes detecting an operating characteristic associated with a load of the network. The method further includes determining an process for adjusting a size of a contention window in response to a successful transmission of a frame based on the detected operating characteristic, the contention window being provided for determining a deferral period for deferring access to the wireless medium. The method further transmitting information indicating the process to one or more wireless devices operating within the network. | 07-17-2014 |
20140198741 | SYSTEM AND METHOD FOR SELECTING MEDIUM ACCESS PARAMETERS FOR EACH COMMUNICATION SESSION - Systems and methods for selecting medium access parameters for each communication session are disclosed. In one aspect an access point includes a processor configured to select a value for a medium access parameter for a particular communication session between the access point and a wireless station. | 07-17-2014 |
20140198872 | SYSTEMS AND METHODS FOR DETECTING OR SIGNALING THE PRESENCE OF BURSTY INTERFERENCE ON WIRELESS NETWORKS - Systems, methods, and devices for detecting and managing the presence of bursty interference on a wireless communication system are disclosed. One aspect of the subject matter described in the disclosure provides a method of detecting the presence of bursty interference on a wireless network. The method includes receiving, at a wireless device, a message from a transmitting device. The method further includes determining whether the message includes errors caused by bursty interference. The method further includes suspending a channel tracking when bursty interference is detected. In an embodiment the method further includes reporting bursty interference to the transmitting device when bursty interference is detected. | 07-17-2014 |
20140211699 | METHODS AND APPARATUSES FOR OPPORTUNISTIC ADVERTISING BEACON TRANSMISSION ON NON-SERVING WIRELESS CHANNELS - The present disclosure presents methods and apparatuses for improved wireless node transmission of advertising beacons based on, for example, the presence of sufficient wireless node resource availability and one or more user equipment (UE) wakeup schedules. For example, the present disclosure describes example methods of advertising beacon transmission by a wireless node, which may include determining that a resource availability opportunity exists for supporting a UE at the wireless node. In another aspect, methods may include tuning to a non-serving channel based on determining that the resource availability opportunity exists. According to such example methods, the non-serving channel may be different from a serving channel of the wireless node. Furthermore, the example methods may include transmitting an advertising beacon on the non-serving channel. Upon successful receipt of the advertising beacon, the UE may scan for the serving channel of the wireless node for subsequent wireless network access. | 07-31-2014 |
20140241168 | INDICATING WHETHER DATA WAS SUBJECTED TO INTERFERENCE - An explicit indication is provided regarding whether information was subjected to interference during transmission. For example, a receiver can monitor received packets and determine whether any of data units in a given received packet were subjected to interference during transmission. If so, the receiver can send an indication to the transmitter to inform the transmitter of the interference. This indication enables the transmitter to distinguish between packet loss that occurred as a result of channel fade and packet loss that occurred as a result of interference. Consequently, the transmitter is able to invoke different actions depending on whether the packet loss is due to channel fade or interference. | 08-28-2014 |
20140247774 | MANAGING ACCESS TO TRANSMISSION MEDIUM IN A WIRELESS ENVIRONMENT - An apparatus and method for managing interference in a transmission medium are disclosed. A apparatus and method may be used to detect a condition experienced by only one of first and second wireless nodes, and modify an operational parameter of one of the first and second wireless nodes, if the condition is detected, such that both the first and second wireless nodes experience the condition or neither the first and second wireless nodes experience the condition. | 09-04-2014 |
20140247819 | Autonomous Adaptation of Discovery Packet Transmission Frequency - According to one or more embodiments of the present disclosure, a method for autonomously adapting a discovery packet (DP) transmission frequency comprises: calculating, by an electronic processor of a device of a plurality of devices in a system, a DP transmission cycle “N”, wherein the calculating further comprises: broadcasting, by the device, its own observed device number in a DP; decoding, by the electronic processor of the device, an observed device number from DPs of each detectable device of the plurality of devices in the system; computing, by the electronic processor of the device, a final observed device number for the system wherein the final observed device number is a maximum (“M”) of its own observed device number and all decoded observed device numbers from DPs of the detectable devices; and based on the computed maximum (“M”), determining, by the electronic processor of the device, the DP transmission cycle “N”. | 09-04-2014 |
20140254400 | METHODS AND APPARATUSES FOR PROVIDING A BINARY CHANNEL QUALITY INDICATOR FOR A SERVING WIRELESS CHANNEL - The present disclosure presents methods and apparatuses for providing a simplified channel quality indicator associated with a serving channel to a serving wireless node, so that the load and delay for feedback can be minimized. For example, the present disclosure describes example methods of channel quality indicator determination and reporting by a user equipment (UE), which may include measuring a serving channel of a wireless node and calculating a binary channel quality indicator that identifies a general quality of a serving channel of the wireless node. Additionally, example methods may include transmitting the binary channel quality indicator from the UE to the wireless node. Furthermore, upon successful receipt of the binary channel quality indicator, the wireless node may alter one or more channel characteristics based on the binary channel quality indicator, thereby providing improved user experience at the UE. | 09-11-2014 |
20140256322 | UPLINK INTERFERENCE MITIGATION BY ADAPTING OPEN CELL TRANSMISSION POWER - Methods and apparatus are disclosed for interference mitigation of an open-access node. The method includes determining, at the open-access node, whether uplink interference from a mobile entity is above a threshold. The method includes adjusting a transmission power to trigger a hand-in of the mobile entity in response to determining the uplink interference is above the threshold. The method includes handing-in the mobile entity from a first cell in response to adjusting the transmission power. The method includes redirecting the mobile entity to a second cell different from the first cell. | 09-11-2014 |
20140269251 | NETWORK-BASED ALARMING AND NETWORK-BASED RECONFIGURATION - Techniques for supporting communication by base stations are disclosed. In an aspect of the present disclosure, for network-based alarming, a base station may notify a designated user equipment (UE) whenever certain trigger events occurred at the base station. The base station may send notification messages for detected trigger events to the UE for timely intervention. In another aspect of the present disclosure, for network-based reconfiguration, a base station for a small cell may be reconfigured by a network server based on performance metrics for base stations in a wireless system. The reconfiguration may improve the performance of the base station and possibly other base stations in the wireless system. | 09-18-2014 |
20140314003 | ACCESS POINT DISCOVERY CHANNEL - Access points communicate via a discovery channel. For example, access points may transmit at a higher transmit power and at a lower rate on the discovery channel than on operating channels. In this way, the radio frequency range of the discovery channel is longer than the range of any of the operating channels. Consequently, a particular access point can communicate with and thereby account for other access points that the particular access point might not hear via an operating channel. | 10-23-2014 |
20140314004 | GROUP SCHEDULING AND ACKNOWLEDGEMENT FOR WIRELESS TRANSMISSION - An acknowledgment (ACK) frame has two parts: a group ACK part and a scheduling information part. In the group ACK part, an ACK/NACK indicator is included for a previous uplink (UL) transmission per station (STA). In the scheduling information part, information included for the following UL transmission per selected STA may comprise, for example, one or more of: a number of selected STAs, a media access control (MAC) address of each selected STA, a data transmission duration per selected STA, a transmission rate per selected STA, a request transmission duration, a pilot transmission order, or a STA transmission order. | 10-23-2014 |
20140328191 | SYSTEMS AND METHODS FOR REUSE OF A WIRELESS MEDIUM FOR HIGH EFFICIENCY WIFI - Systems and method for concurrent communication using high efficiency wifi are disclosed. One aspect is a method of transmitting a wireless message on a medium utilizing carrier sense multiple access (CSMA). The method includes receiving, via a first wireless device, at least a portion of a first wireless message from a second wireless device, the message including an indication of a basic service set of the second wireless device. The method also includes determining whether to defer transmission of a second wireless message based, at least in part, on the basic service set of the second wireless device. | 11-06-2014 |
20140328192 | METHODS AND SYSTEMS FOR COMMUNICATION IN DENSE WIRELESS ENVIRONMENTS - Systems, methods, and computer readable storage media communicate with a wireless device within a dense wireless environment. In one aspect, a method includes determining whether a wireless device is subject to interference, adjusting a transmission attribute based on the determining, and transmitting a message to the wireless device based on the adjusted transmission attribute. In some aspects, adjusting a transmission attribute may include selecting one or more of time division multiplexing or frequency division multiplexing when communicating with the wireless device. In some aspects, particular time periods and/or particular frequency bands may be selected for communication with the device depending on whether the device is subject to interference. | 11-06-2014 |
20140328195 | SYSTEMS AND METHODS FOR DOWNLINK FREQUENCY DOMAIN MULTIPLEXING TRANSMISSIONS - Systems, methods, and devices for transmitting data are described herein. In some aspects, a method comprises generating a first packet. The first packet may comprise a physical layer and a media access control (MAC) layer. The MAC layer may allocate a first station to a primary frequency channel and a second station to a secondary frequency channel. The method further comprises transmitting the first packet to the first station and the second station. The method further comprises transmitting a second packet to the first station using the primary frequency channel. The method further comprises transmitting a third packet to the second station using the secondary frequency channel. | 11-06-2014 |
20140328235 | METHODS AND SYSTEMS FOR FREQUENCY MULTIPLEXED COMMUNICATION IN DENSE WIRELESS ENVIRONMENTS - Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes exchanging, at an access point, at least one frame reserving a wireless medium with at least one of a first and second wireless device. The method further includes receiving a first communication on a first set of wireless frequencies from the first wireless device. The method further includes receiving a second communication, at least partially concurrent with the first communication, on a second set of wireless frequencies from the second wireless device. The method further includes transmitting at least one acknowledgment of the first and second communication. The first set and the second set are mutually exclusive subsets of a set of wireless frequencies available for use by both the first and second wireless device. | 11-06-2014 |
20140328236 | METHODS AND SYSTEMS FOR FREQUENCY MULTIPLEXED COMMUNICATION IN DENSE WIRELESS ENVIRONMENTS - Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes receiving, at a first wireless device, a reference signal from an associated access point, the reference signal indicative of a time of joint transmission with at least a second wireless device. The method further includes transmitting a first communication to the access point based on the reference signal, the communication utilizing a first subset of wireless frequencies available for use. The first communication is concurrent with a second communication, from the second wireless device, utilizing a second subset of wireless frequencies, the second subset excluding the first subset. | 11-06-2014 |
20140328261 | SYSTEMS AND METHODS FOR PEER-TO-PEER AND AP TRAFFIC MULTIPLEXING - Systems, methods, and devices for concurrently allowing station-to-station transmissions and access point-to-station transmissions are described herein. In some aspects, a method comprises transmitting, to an access point, a request for an available channel frequency. The method further comprises receiving a coordination message from the access point. The coordination message may indicate that a first frequency channel is allocated for transmissions between a first device and a second device and that a second frequency channel is allocated for transmissions between a third device and a fourth device. The method further comprises transmitting a first data packet to the fourth device using the second frequency channel concurrently with a transmission of a second data packet between the first device and the second device using the first frequency channel. | 11-06-2014 |
20140328262 | SYSTEMS AND METHODS FOR PEER-TO-PEER AND AP TRAFFIC MULTIPLEXING - Systems, methods, and devices for concurrently allowing station-to-station transmissions and access point-to-station transmissions are described herein. In some aspects, a method comprises receiving, from a first device, a peer request to send message requesting a first time for transmissions with a second device. The method further comprises reserving the first time for transmissions between the first device and the second device. The method further comprises transmitting a coordination message to the first device and the second device. The coordination message may indicate that the first time is reserved for transmissions between the first device and the second device. The method further comprises transmitting a first data packet to a third device during a time other than the first time. The first device may transmit a second data packet to the second device during the first time. | 11-06-2014 |
20140328264 | SYSTEMS AND METHODS FOR COORDINATION MESSAGING USING HIGH EFFICIENCY WIFI - Systems, methods, and devices for coordinating access to a shared medium are described herein. In some aspects, a method includes receiving information at an access point. The method further includes modifying, based on the received information, the use of the shared medium by one or more wireless devices to reduce the likelihood that the wireless devices are subject to interference. The method may further include determining whether one or more wireless devices is subject to interference with another wireless device in the wireless network. The method may further include identifying the one or more wireless devices that is subject to interference. | 11-06-2014 |
20140328265 | SYSTEMS AND METHODS FOR DOWNLINK FREQUENCY DOMAIN MULTIPLEXING TRANSMISSIONS - Systems, methods, and devices for transmitting data are described herein. In some aspects, a method comprises generating a first message. The first message may comprise an allocation of a first station to a first frequency channel and a second station to a second frequency channel. The method further comprises transmitting the first message over the first frequency channel and the second frequency channel. The method further comprises transmitting, after transmission of the first message, a second message to the first station using the first frequency channel. The method further comprises transmitting, after transmission of the first message, a third message to the second station using the second frequency channel. | 11-06-2014 |
20140328313 | METHODS AND SYSTEMS FOR FREQUENCY MULTIPLEXED COMMUNICATION IN DENSE WIRELESS ENVIRONMENTS - Systems, methods, and devices for high-efficiency wireless frequency division multiplexing are provided. A method includes determining, at an access point, a performance characteristic for each wireless device in a set of wireless devices associated with the access point. The method further includes categorizing each wireless device in the set into at least a first and second subset of wireless devices based on the performance characteristic. The method further includes receiving communications from the first subset of wireless devices on a first set of wireless frequencies. The method further includes receiving communications from the second subset of wireless devices on a second set of wireless frequencies, the second set of wireless frequencies being a subset of the first. The first set of wireless devices have a higher performance characteristic than the second set of wireless devices. | 11-06-2014 |
20140357269 | SERVER-ASSISTED DEVICE-TO-DEVICE DISCOVERY AND CONNECTION - A method includes receiving, at a network node, a device-to-device D2D discovery request from a first device and sending a D2D discovery response from the network node to the first device. The D2D discovery response includes information associated with a second device that is available to establish a D2D connection with the first device. The network node may perform inquiries regarding D2D connection permission from both devices. If D2D connection is permitted by both devices, the network node may facilitate the D2D scanning by sending each device's scanning information to the other device via a non-D2D link. In parallel to D2D scanning, the network node may speed up D2D link setup by distributing, via non-D2D links, link setup information to each device, where the link setup information may include device credential(s), IP address allocation(s), and/or group owner assignment. | 12-04-2014 |
20150016268 | SYSTEMS AND METHODS FOR DYNAMIC ADAPTATION OF CHANNEL ACCESS OR TRANSMISSION PARAMETERS - Systems and methods for dynamically adapting channel access or transmission parameters based upon an identified channel access parameter or previously used transmission parameter are disclosed. In an aspect, an electronic device for communication over a wireless network is disclosed. The electronic device comprises a processor configured to generate a message that identifies one rule of a plurality of rules. Each of the plurality of rules defines a process for adapting a value of a communication parameter based on an identified channel access parameter. Also, each of the plurality of rules provides a particular quality of service and a particular priority for communication with the electronic device. The electronic device further comprises a transceiver configured to transmit the message to a station. | 01-15-2015 |
20150063327 | HIGH EFFICIENCY WIRELESS (HEW) ACCESS POINT (AP) COORDINATION PROTOCOL - Systems, methods, and devices for high efficiency wireless (HEW) access point (AP) coordination protocol are described herein. According to certain aspects, a method for coordinating access to a shared medium by an access point (AP) is provided. The method generally synchronizing with one or more peer apparatuses based on synchronization messages detected during a listening time, outputting, for transmission, scheduling information to the one or more peer apparatuses, the scheduling information indicating one or more time periods during which coordinated access to the shared medium is desired, and outputting, for transmission, at least some of the scheduling information to devices served by the apparatus. | 03-05-2015 |
20150078215 | SYSTEMS AND METHODS FOR FULL DUPLEX COMMUNICATION OVER A WIRELESS NETWORK - Systems, methods, and apparatuses for full duplex communication on a wireless network are disclosed. In one aspect, one or more lists of non-effecting nodes are determined for one or more devices on the wireless network. A list of non-effecting nodes for a device identifies other network nodes or devices whose transmissions do not cause substantial interference with the device. When a full duplex communication is scheduled on the wireless network, a downlink message transmitted to the device may be performed concurrently with an uplink transmission from one of the non-effecting devices. This full duplex communication may be possible even if the device does not inherently support full-duplex communication on the wireless network. | 03-19-2015 |
20150078298 | STAGGERED PRIMARY CHANNELS FOR WIFI - Certain aspects of the present disclosure relate generally to wireless communications, and more specifically to systems, methods, and devices for staggered primary channel selection for WiFi. According to certain aspects, a method for wireless communications is provided. The method may be performed, for example, by an access point (AP). The method generally includes obtaining information regarding neighbor basic service sets (BSSs), selecting a primary channel based on the obtained information, and output for transmission a message signaling an intention to communicate using the selected primary channel. | 03-19-2015 |
20150078299 | DEFERRAL BASED ON BSSID INFORMATION - Aspects of the present disclosure provide techniques and apparatus for deferral based on basic service set identification (BSSID) information. According to certain aspects, a method for wireless communications is provided. The method generally includes receiving, on a shared access medium, a packet having at least one deferral-related parameter and deciding whether to defer transmission on the shared access medium based, at least in part, on the deferral-related parameter. Another method may generally include generating a packet comprising at least one deferral-related parameter to be used by another apparatus for deciding whether or not the other apparatus should defer transmitting on a shared access medium and providing the packet to the other apparatus. | 03-19-2015 |
20150117369 | SYSTEMS AND METHODS FOR SCHEDULING GROUP ACCESS IN WIRELESS NETWORKS - Systems, methods, and devices for wireless communication are described herein. In some aspects, a method includes determining one or more classes of compatible transmissions from one or more wireless devices. The method further includes defining scheduled time slots for each of the one or more classes. The method further includes defining a channel access procedure associated with each of the scheduled time slots. The method further includes accessing a wireless medium during an associated scheduled time slot according to the channel access procedure by one or more of the wireless devices. | 04-30-2015 |
20150124681 | SYNCHRONIZED GROUP MESSAGING - Devices and methods for synchronized group messaging in a wireless communication system are described. Multicast transmissions, such as those in a dense network, can cause significant medium usage because same multicast packet is likely sent by multiple APs at different time. Medium usage in such implementations may be redundant. As such, the transmission medium is not used optimally. Devices and methods which coordinate and align group messages (e.g., multicast packets) amongst APs are described. Each AP may be configured to transmit identical packets at the same time. Therefore, medium usage can be reduced, while the range can be extended due to accumulated energy from APs. | 05-07-2015 |
20150131529 | SERVER AIDED NAN CLUSTER MERGING - One embodiment of this invention comprises an apparatus that desires to merge clusters in a neighbor aware network comprising a processing system, where the processing system is configured to generate a request to another apparatus to inform the apparatus when a neighboring cluster with a better cluster grade than the cluster of the apparatus exists, provide the request for transmission to the other apparatus, receive a response from the other apparatus informing of the neighboring cluster with the better cluster grade, scan for the neighboring apparatus, and merge with the neighboring cluster with the better cluster grade. | 05-14-2015 |
20150156730 | METHOD AND APPARATUS FOR DEVICE TRANSMIT POWER CAPPING IN WIRELESS COMMUNICATIONS - Methods and apparatuses are provided for determining a transmission power cap for one or more devices based at least in part on pathloss measurements to one or more access points received from the one or more devices. A common transmission power cap can also be computed for assigning to devices communicating with an access point, and the transmission power cap for a given device can be adjusted when the transmission power is at or a threshold level from the common power cap to conserve signaling in the wireless network. Adjustment of the transmission power cap can additionally or alternatively be based on a received power at an access point related to signals from the device, an interference report from one or more access points, and/or the like. | 06-04-2015 |
20150201419 | MITIGATE ADJACENT CHANNEL INTERFERENCE AND NON-WI-FI INTERFERENCE - Devices, systems and methods are described for mitigating interference in a wireless communications network. In particular, the network may be a Wi-Fi network. Multiple approaches may be implemented to mitigate ACI. Further, multiple approaches may be implemented to mitigate non-Wi-Fi interference as well. Each of the approaches may consist of two parts, namely, interference detection and interference mitigation (or reduction). One approach may involve: detecting adjacent channel interference (ACI) in an operating channel of the device; determining a location of the detected ACI in an operating band of the device; and mitigating the detected ACI by communicating via a channel different from the operating channel, the different channel being determined to be further away from the location of the detected ACI. | 07-16-2015 |
20150208438 | METHODS AND APPARATUS FOR SIGNALING ENHANCED DISTRIBUTED CHANNEL ACCESS PARAMETERS FOR SUBSETS OF WIRELESS DEVICES - A method for configuring channel access parameters in a wireless communication system includes selecting an element identification (ID) from a plurality of element IDs. Each of the plurality of element IDs identifies an enhanced distributed channel access (EDCA) parameter set element comprising at least one channel access parameter for at least one subset of wireless devices in a group of wireless devices. The selected element ID is identifiable by wireless devices of the group of wireless devices and not identifiable by other wireless devices. The method further includes generating the EDCA parameter set element for setting the at least one channel access parameter for each wireless device in the at least one subset. The EDCA parameter set element includes the selected element ID. The method further includes transmitting the EDCA parameter set element to at least one wireless device in the at least one subset of wireless devices. | 07-23-2015 |
20150236931 | INDICATING INTERFERENCE MAGNITUDE - An explicit indication is provided regarding whether information was subjected to interference during transmission. For example, a receiver can monitor received packets and determine whether any of data units in a given received packet were subjected to interference during transmission. If so, the receiver can send an indication to the transmitter to inform the transmitter of the interference. This indication enables the transmitter to distinguish between packet loss that occurred as a result of channel fade and packet loss that occurred as a result of interference. Consequently, the transmitter is able to invoke different actions depending on whether the packet loss is due to channel fade or interference. | 08-20-2015 |
20150244487 | UPLINK INTERFERENCE MITIGATION BY ADAPTING OPEN CELL TRANSMISSION POWER - Methods and apparatus are disclosed for interference mitigation of an open-access node. The method includes determining, at the open-access node, whether uplink interference from a mobile entity is above a threshold. The method includes adjusting a transmission power to trigger a hand-in of the mobile entity in response to determining the uplink interference is above the threshold. The method includes handing-in the mobile entity from a first cell in response to adjusting the transmission power. The method includes redirecting the mobile entity to a second cell different from the first cell. | 08-27-2015 |
20150245280 | SYSTEM AND METHOD FOR ACCESS POINT SELECTION - A system and method for priority scan an association with a desired access point is disclosed herein. In one aspect, a wireless station may be associated with a first access point and communicating with the first access point via a contention-based communication protocol. The wireless station may detect movement of the wireless station. Based at least in part on the motion of the wireless station or information regarding at least a second access point, the wireless station may initiate a selective scan for at least the second access point. Based on the scan, the wireless station may then identify at least the second access point. The wireless station may then associate with the second access point based on the movement, an association priority, or information autonomously detected or received from the first or second access point. | 08-27-2015 |
20150245335 | ENHANCED TRIGGER FRAME BASED DISCOVERY FOR A NEIGHBOR AWARENESS NETWORK - When a first node cannot hear a second node, the second node is “hidden” to the first node. In response to receiving a trigger frame, the two nodes may inadvertently transmit response frames at approximately the same time. The response frames may collide with each other, thereby causing delays in node discovery in a NAN. Provided herein are methods, apparatuses, and computer program products for reducing collisions in wireless communication. In some configurations, nodes may receive trigger frames that indicate a reduction in the rate that response frames are transmitted when traffic load conditions are high. In some configurations, nodes located in different coverage areas (e.g., a “hidden area” and a “non-hidden area”) may transmit response frames at different times. In some configurations, the nodes may refrain from transmitting their response frames upon hearing that another node having a higher serving preference rank is transmitting. | 08-27-2015 |
20150264657 | SYSTEMS AND METHODS FOR SYNCHRONIZATION OF WIRELESS DEVICES IN A PEER-TO-PEER NETWORK - Methods, devices, and computer program products for synchronization of wireless devices in a peer-to-peer network are described herein. In one aspect, a method for synchronizing a wireless communication apparatus is provided. The method includes determining, at a wireless communication apparatus, a first time interval since transmitting a message including a time value of a clock signal of the wireless communication apparatus; and determining, at the wireless communication apparatus, a second time interval since updating the time value of the wireless communication apparatus; and transmitting a message comprising content that is based on comparing the first time interval to a first threshold and comparing the second time interval to a second threshold. | 09-17-2015 |
20150281980 | EDCA ADJUSTMENT FOR POOR PERFORMANCE NODES - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a node. The node may suffer poor QoS due to low medium usage caused by a number of contenders. The apparatus obtains node information of the node. The apparatus receives configuration information from a configuring device. The apparatus determines whether to trigger an enhanced distributed channel access (EDCA) adjustment based on at least one of the configuration information or the node information. A purpose of the adjustment is to improve the node's QoS by increasing the aggressiveness of node's EDCA parameters or by reducing the aggressiveness of neighboring nodes' EDCA parameters. | 10-01-2015 |
20150288599 | METHODS FOR SELECTION OF LINK AGGREGATION CAPABLE ACCESS POINTS - A method, an apparatus, and a computer program product for wireless communication are provided. In one aspect, an apparatus includes a processor configured to identify at least one interface (e.g., AP interface) configured to support link aggregation, identify one or more groups of the at least one interface, wherein all interfaces of a respective group are configured to be aggregated together, identify supported link aggregation types per group, select one of the groups to support communication via link aggregation, select at least one interface of the selected group, and send information to the selected at least one interface to initialize link aggregation. | 10-08-2015 |
20150312004 | Group Scheduling and Acknowledgement for Wireless Transmission - An acknowledgment (ACK) frame has two parts: a group ACK part and a scheduling information part. In the group ACK part, an ACK/NACK indicator is included for a previous uplink (UL) transmission per station (STA). In the scheduling information part, information included for the following UL transmission per selected STA may comprise, for example, one or more of: a number of selected STAs, a media access control (MAC) address of each selected STA, a data transmission duration per selected STA, a transmission rate per selected STA, a request transmission duration, a pilot transmission order, or a STA transmission order. | 10-29-2015 |
20150327291 | SYSTEMS, METHODS, AND APPARATUS FOR INCREASING REUSE IN WIRELESS COMMUNICATIONS - Systems, methods, and apparatus are disclosed for increasing reuse in wireless communications. In one aspect, a method of wireless communication is provided. The method includes receiving a first message from a first device, the first message indicating a transmission of a second message from the first device to a second device. The method further includes receiving a third message from the second device, the third message comprising training information for determining a communication channel at the second device. The method further includes generating a beamformed message based at least in part on the training information such that the beamformed message nulls interference at the second device. The method further includes scheduling a transmission of the beamformed message to a third device concurrent with the transmission of the second message. | 11-12-2015 |
20150341130 | SIGNALING SOFT TIME DIVISION MULTIPLEXING IN ENHANCED DISTRIBUTED CHANNEL ACCESS - Methods, systems, and devices are described for signaling soft time division multiplexing (TDM) assignment information in an enhanced distributed channel access (EDCA) operation. The soft TDM assignment may be sent to one or more nodes of a group of nodes to communicate with indicated priority access parameters during at least one of a plurality of time slots. The soft TDM assignment may also convey one or more backoff operation rules to at least one of the one or more nodes. Further, primary and secondary non-concurrent nodes may be identified and a signal sent to the secondary node for it to communicate, at a different priority than the primary node, during at least one of a plurality of non-concurrent time slots the primary node is communicating during. | 11-26-2015 |
20150341876 | SYSTEMS AND METHODS FOR SYNCHRONIZATION OF WIRELESS DEVICES IN A PEER-TO-PEER NETWORK - Methods, devices, and computer program products for synchronization of wireless devices in a peer-to-peer network are described herein. In one aspect, a method for synchronizing a wireless communication apparatus is provided. The method includes selectively updating a time value of the wireless communication apparatus in response to receiving one or more received synchronization messages from other wireless communication apparatuses during the discovery interval, the one or more received synchronization messages comprising one or more received timestamps of the other wireless communication apparatuses, wherein selectively updating the time value comprises updating based on one or more criteria and the received timestamps, and transmitting the synchronization message in response to determining an absence any received synchronization messages during the discovery interval. | 11-26-2015 |
20150372919 | SYSTEMS AND METHODS FOR ENHANCED SIGNALING FOR BEACON LOAD REDUCTION - In a dense network, a node (e.g., a station) may receive beacons from a large number of access points. This may result in the node receiving a large quantity of beacons, which may affect the node's ability to efficiently utilize the communication medium. Thus, in some embodiments, the node may be capable of detecting or determining a beacon load it sees from one or more access points and determine if its beacon load is equal to or above one of a total beacon load threshold or an individual access point beacon load threshold. The total beacon load threshold or the individual beacon load threshold may be determined by at least one of the node, the access points, the user, or the network, and the node may request each access point from which the node receives beacons to reduce its beacon load. | 12-24-2015 |
20150373639 | SYSTEMS AND METHODS FOR POWER SAVING VIA ENHANCED SCANNING AND BEACONING FOR CO-LOCATED APs AND ASSOCIATED STAs - A wireless terminal, when operating in a system including co-located access points (APs), may, to save scan power, only scan for a second wireless network when the received signal strength indicator (RSSI) from a first wireless network (WAN) is above or below a certain threshold. The AP from a first WAN may obtain the RSSI of a second WAN from terminals in the coverage of the second WAN, and compute the RSSI edge of the second WAN. This RSSI edge forms a threshold where terminals may start scanning for the edge of the second WAN. In addition, a second AP may only turn on and transmit a beacon when terminals exist within its range, determined by the second AP based on communications of co-located APs. Finally, the AP may provide hierarchical beacon messages to terminal monitoring of beacons on WANs when no information is being transmitted on those WANs. | 12-24-2015 |
20160029293 | Method and apparatus for mitigating interference in femtocell deployments - Methods and apparatuses are provided for mitigating interference among access points, and/or devices communicating therewith, in unplanned network deployments. Based on determining that one or more served devices potentially interfere with one or more access points, an inter-frequency handover (IFHO) threshold or data rate can be adjusted for the device to cause IFHO or reduce occurrence of interference, and/or a coverage area can be modified so the device can communicate with one or more other access points to mitigate potential interference. Based on determining interference from one or more devices served by other access points, an access point can switch operating modes to a hybrid or open access point to allow the one or more devices to handover to the access point, and/or can boost downlink transmit power to cause the one or more devices to perform IFHO from the other access points to mitigate potential interference. | 01-28-2016 |
20160080974 | SYSTEMS AND METHODS FOR ADJUSTING AN OPERATING CHARACTERISTIC OF A WIRELESS COMMUNICATION NETWORK BASED ON LOAD TO INCREASE QUALITY OF SERVICE - Methods and apparatus for adjusting an operating characteristic of a wireless communication network based on load to increase quality of service (QoS) are disclosed herein. One aspect of the present disclosure provides a method of communicating in a wireless communication network including a plurality of stations. The method includes determining a load of the wireless communication network and whether one or more of the plurality of stations are satisfying their QoS requirements. The method further includes determining an adjustment to the wireless communication network based at least in part on the load of the wireless communication network so as to increase a number of the plurality of stations that satisfy their QoS requirements, the adjustment based on one or more of a clear channel assessment threshold and/or a request to send and clear to send messaging in. | 03-17-2016 |
20160081031 | POWER CONTROL IN WIRELESS NETWORKS - A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, the apparatus is configured to measure an energy level of a transmission channel. The apparatus is configured to compare the measured energy level to a first threshold energy level. The first threshold energy level corresponds to a first state of the transmission channel. The apparatus is configured to determine whether to transmit data in the transmission channel based on the comparison. The apparatus is configured to reduce a transmission power of the apparatus and transmit the data in the transmission channel at the reduced transmission power when the measured energy level is greater than the first threshold energy level. | 03-17-2016 |
20160081056 | SYSTEMS AND METHODS FOR ADJUSTING CLEAR CHANNEL ASSESSMENT LEVELS TO INCREASE WIRELESS COMMUNICATION NETWORK THROUGHPUT - Methods and apparatus for adjusting clear channel assessment levels are disclosed herein. One aspect of the present disclosure provides a method of adjusting deferral on a first wireless communication network. The method includes determining a first distance between the first wireless communication network and a second wireless communication networks operating on a shared or partially-shared channel, determining an adjustment to a deferral mechanism based at least in part on the first distance, and transmitting an indication to one or more stations in the first wireless communication network, the indication based at least in part on the adjustment to the deferral mechanism. | 03-17-2016 |
20160081106 | ENHANCED RTS/CTS ENABLEMENT AND DETECTION - In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be an AP that requests a plurality of STAs to jointly enable and disable an MRP based on at least one of that each STA of the STAs has uplink traffic with the AP or that each STA of a subset of the STAs has a hidden node. The AP receives, from the STAs, information indicating a communication metric while jointly enabling or disabling the MRP. The AP determines, based on the received information indicating the communication metric, whether the joint enablement of the medium reserving procedure improves communication for the plurality of STAs. The AP requests the STAs to jointly enable the medium reserving procedure for subsequent communication when the joint enablement of the medium reserving procedure improves communication for the plurality of STAs. | 03-17-2016 |
20160088126 | METHODS AND APPARATUS FOR PACKET ACQUISITION IN MIXED-RATE WIRELESS COMMUNICATION NETWORKS - A method of wirelessly communicating a packet includes generating, at a first wireless device, a first packet including a first preamble decodable by a plurality of devices and a second preamble decodable by only a subset of the plurality of devices. The first preamble includes a first signal field. The second preamble includes a first training field. The method further includes transmitting the first packet concurrently with one or more second packets to be transmitted by wireless devices other than the first wireless device. | 03-24-2016 |
20160088618 | USING RTS/CTS TO ENHANCE NETWORK PERFORMANCE - In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be an AP. The AP determines an interference metric of a BSS having a plurality of STAs. The AP is in the BSS. The interference metric indicates a degree of interference in the BSS caused by one or more hidden nodes associated with the plurality of STAs. The AP determines whether the interference metric meets a threshold. The AP transmits, to the plurality of STAs, a frame including an indicator when the interference metric meets the threshold. The indicator indicates to each of the plurality of STAs to enable a medium reserving procedure. The medium reserving procedure reserves a medium for data transmission. | 03-24-2016 |
20160095139 | METHODS AND APPARATUS FOR IMPLEMENTING MULTIPLE USER UPLINK MEDIUM ACCESS CONTROL PROTOCOLS IN A WIRELESS NETWORK - A user terminal for multiple-user wireless communication is provided, comprising a transmit buffer configured to store uplink data for transmission. The user terminal comprises a processor configured to generate a request to transmit frame in response to uplink data being present in the transmit buffer, and initiate a transmit timer for determining when to transmit the request to transmit frame. The user terminal comprises a transmitter configured to transmit the request to transmit frame when the transmit timer expires or when the uplink data present in the transmit buffer exceeds a threshold amount. The user terminal comprises a receiver configured to receive a clear to transmit frame from an access point based on the transmitted request to transmit frame. The transmitter is further configured to transmit the uplink data present in the transmit buffer, concurrently with at least one other user terminal transmitting uplink data, to the access point at a specified time based on receiving the clear to transmit frame addressed to the user terminal. | 03-31-2016 |
20160112944 | ACCESS POINT SELECTION BASED ON ASSOCIATION PERFORMANCE - Methods, systems, and devices are described for wireless communication at a wireless device, and for selecting or coordinating with an access point (AP) based on association performance of access points. A wireless device under the coverage of more than one AP can associate with one or more APs to establish communication with a network. A wireless device may estimate a delay due to authentication with an AP, and the wireless device may communicate with another AP while waiting to be authenticated. In some examples, a wireless device may associate with an AP despite sub-optimal access metrics; this may involve certain permissions from the AP. In other examples, an AP may manage pre-association devices, post-association devices, or both, based on certain priorities. A mobile device may request and/or receive information regarding association delays and/or channel load metrics from one or several APs and may select an AP accordingly. | 04-21-2016 |
20160112969 | TECHNIQUES FOR ENERGY DETECTION LEVEL ADJUSTMENTS - Methods, systems, and devices are described for improve network performance, such as throughput and PER, by allowing nodes to adjust energy detection (ED) threshold levels. For example, a method for Wi-Fi wireless communication includes determining, by a first node, an ED threshold level for a second node of a wireless network based at least in part on a metric for the first node. The method may also include signaling, from the first node to the second node, an ED level set element that indicates the determined ED threshold level. In another example, a method includes signaling, by a first node, an ED level adjustment capability of the first node to one or more nodes in a wireless network. | 04-21-2016 |
20160127883 | POWER-EFFICIENT AVAILABILITY ADVERTISING AND DISCOVERY - A method of communication includes detecting receipt of an advertisement message by a first communication circuitry while monitoring communications transmitted according to a first communication protocol. The advertisement message may include an information element indicating that a second device is available to participate in a first local ad hoc wireless network using a second communication protocol. The method further includes, based on the detecting receipt of the advertisement message, enabling a second communication circuitry of the first device for forming the first local ad hoc wireless network between the first device and the second device. | 05-05-2016 |