Patent application number | Description | Published |
20120207087 | AGGREGATED MPDU (A-MPDU) NUMEROLOGY AND MPDU GROUPING - Certain aspects of the present disclosure provide techniques and apparatus for transmitting, receiving, and acknowledging MAC protocol data units (MPDUs), allowing single bits in a Block Acknowledgment (BA) bitmap to acknowledge receipt of multiple MPDUs. As a result, a greater number of MPDUs may be acknowledged than if each bit acknowledged only a single MPDU. By reducing the overhead associated with a re-transmission bitmap, a greater number of MPDUs may be aggregated, thereby increasing overall throughput. | 08-16-2012 |
20120243485 | REQUEST TO SEND (RTS) AND CLEAR TO SEND (CTS) FOR MULTICHANNEL OPERATIONS - Certain aspects of the present disclosure provide techniques and apparatus for signaling the bandwidth to be used for wireless communications using an RTS/CTS (Request to Send/Clear to Send) frame exchange, providing for bandwidths of at least 20 MHz, 40 MHz, 80 MHz, 160 MHz, or higher. This exchange of bandwidth information may be performed implicitly—by determining the channels in which the RTS/CTS frames are actually sent—or explicitly. In addition to this bandwidth information exchange, aspects of the present disclosure may also allow for Network Allocation Vector (NAV) protection in multiple channels. In this manner, the wireless medium may be reserved, and the transmission may be protected from hidden nodes. | 09-27-2012 |
20120320772 | COMMUNICATION DEVICES FOR TRANSMITTING DATA BASED ON AVAILABLE RESOURCES - A method for transmitting data by a communication device is described. The method includes determining whether there are sufficient resources available to insert data into an aggregated packet. The method also includes inserting discardable data into the aggregated packet if there are not sufficient resources available to insert the data. The method further includes inserting the data into the aggregated packet if there are sufficient resources available to insert the data. | 12-20-2012 |
20130034004 | REFERENCE TBTT ESTIMATION ALGORITHM FOR SMART POWER SAVING ON WLAN CLIENT - A WLAN client receives a plurality of beacons that include timestamp values that indicate when the beacons were sent by an access point (AP). The WLAN client calculates a beacon drift value for each of the plurality of received beacons in response to the timestamp values and known physical layer characteristics associated with the WLAN client. The WLAN client selects one of the calculated beacon drift values that represents a minimum beacon drift, and uses this selected beacon drift value (i.e., golden reference target beacon transmission time (RTBTT) estimate) to control the wakeup timing of the WLAN client. The golden RTBTT estimate is updated if a subsequently received beacon exhibits a shorter beacon drift value. If the wakeup wait period of the WLAN client exceeds a predetermined threshold for each of a plurality of received beacons, the golden RTBTT is recalculated to account for the associated increased beacon drift. | 02-07-2013 |
20130070668 | APPARATUS AND METHOD FOR TRANSMISSION AND RECOVERY MODES FOR AN RTS/CTS SYSTEM THAT UTILIZES MULTICHANNELS - A method, apparatus and computer readable medium for an RTS/CTS system that utilizes a plurality of channels for data transfer, includes sending, by a first device, an RTS frame over the plurality of channels; receiving, by a second device, the RTS frame and outputting a CTS frame to the first device based on receipt of the RTS frame, the CTS frame being output over at least one of the plurality of channels; setting, by each device within a network that receives the RTS frame, a network allocation vector (NAV) to a time duration that is based in part on information included in the RTS frame; and transmitting, by the first device, data to the second device within the time duration set by the NAV using the at least one of the plurality of channels. | 03-21-2013 |
20130077546 | Wireless Beacon Reception - This disclosure describes techniques operating a client device to communicate with a wireless access point. The client device may awake from a low power mode of operation receive a first portion of a beacon from the access point that includes a delivery traffic identification (DTIM) message. According to the techniques described herein, the client device may determine, based on the DTIM message, whether or not one or more packets of data are forthcoming from the access point. If one or more packets of data are forthcoming from the access point, the client device may remain in an active mode of operation to receive the forthcoming packets (and/or a second portion of the beacon). However, if no packets of data are forthcoming from the access point, the client device may return to the low power mode of operation, before receiving and/or processing the second portion of the beacon. | 03-28-2013 |
20130142124 | SYSTEMS AND METHODS FOR LOW-OVERHEAD WIRELESS BEACON TIMING - Systems, methods, and devices for communicating a compressed beacon are described herein. In some aspects, a method of communicating in a wireless network includes transmitting, at an access point, a full beacon at a first multiple of a beacon interval. The method further includes transmitting a compressed beacon at each beacon interval that is not the first multiple of the beacon interval. Another method of communicating in a wireless network includes receiving, at a wireless device, a full beacon at a first multiple of a beacon interval. The method further includes receiving a compressed beacon at a beacon interval that is not the first multiple of the beacon interval. | 06-06-2013 |
20130176922 | SYSTEMS AND METHODS FOR LOW-OVERHEAD WIRELESS BEACONS HAVING NEXT FULL BEACON INDICATIONS - Systems, methods, and devices for communicating a compressed beacon are described herein. In some aspects, a method of communicating in a wireless network. includes generating a compressed beacon. The compressed beacon includes a next full beacon time indication (NFBTI). The method further includes transmitting, at an access point, the compressed beacon. | 07-11-2013 |
20130177000 | SYSTEMS AND METHODS FOR LOW-OVERHEAD WIRELESS BEACONS HAVING COMPRESSED NETWORK IDENTIFIERS - Systems, methods, and devices for communicating a compressed beacon are described herein. In some aspects, a method of communicating in a wireless network. includes creating a shortened network identifier having a first length from a full network identifier having a second length. The first length is shorter than the second length. The method further includes generating a compressed beacon including the shortened network identifier. The method further includes transmitting, at an access point, the compressed beacon. | 07-11-2013 |
20130177001 | SYSTEMS AND METHODS FOR LOW-OVERHEAD WIRELESS BEACON TIMING - Systems, methods, and devices for communicating a compressed beacon are described herein. In some aspects, a method of communicating in a wireless network includes transmitting, at an access point, a full beacon at a first multiple of a beacon interval. The method further includes transmitting a compressed beacon at each beacon interval that is not the first multiple of the beacon interval. Another method of communicating in a wireless network includes receiving, at a wireless device, a full beacon at a first multiple of a beacon interval. The method further includes receiving a compressed beacon at a beacon interval that is not the first multiple of the beacon interval. | 07-11-2013 |
20130201838 | SYSTEM AND METHOD FOR INFORMATION VERIFICATION BASED ON CHANNEL AWARENESS - This disclosure describes techniques for operating a client device to communicate with a wireless access point to validate data within a frame by comparing channel quality metrics and duration metrics to thresholds. Information received within a validity window may be treated as correctly received even if the frame fails a subsequent verification process or if reception of the frame is terminated prior to the end of the frame. | 08-08-2013 |
20130315141 | METHODS AND A SYSTEM OF MULTIPLEXING MULTIPLE CONCURRENT OPERATIONAL MODES ON A SINGLE PHYSICAL TRANSCEIVER BY OPPORTUNISITC TIME STEALING - Systems and methods are provided for enhancing the concurrency of a wireless device operating in multiple network contexts. By identifying opportunity instants that may exist within the normal exchange of information by a device having a single physical transceiver in a first network context, tasks for a second network context may be performed using the transceiver with minimal impact on performance related to the first network context and preferably in complete transparence to the first network context. | 11-28-2013 |
20140036746 | LISTEN INTERVAL (LI) SELECTION FOR WLAN CLIENT - The listen interval of a WLAN client is selected to have one of a plurality of values, including a start listen interval (SLI) and one or more longer listen intervals (e.g., transient listen interval (TLI), maximum listen interval (MLI)). The listen interval is set to SLI in response to (1) detecting that an applications processor of the WLAN client is in an awake state, (2) detecting transmit/receive activity on the wireless link, and (3) failing to detect an expected beacon signal on the wireless link. If the listen interval is set to MLI (or TLI) and the WLAN client fails to detect an expected beacon signal (beacon miss), the listen interval is temporarily set to SLI. If the WLAN client then detects an expected beacon signal before detecting a predetermined number of consecutive beacon misses, the listen interval is immediately returned to the original listen interval MLI (or TLI). | 02-06-2014 |
20140071955 | Dynamic Sounding Control In Wifi - A method of performing dynamic sounding in a wireless communication device includes determining whether to perform sounding based on an age of current channel state information (CSI). An achievable throughput can be recorded as a reference throughput after performing the sounding. A current achievable throughput can be compared with the reference throughput. A CSI timestamp can be reset when the current throughput is above the reference throughput by a first predetermined amount, thereby prolonging a lifespan of the current CSI. The CSI timestamp can be reduced when the current throughput is below the reference throughput by a second predetermined amount, thereby reducing the lifespan of the current CSI. | 03-13-2014 |
20140126550 | TEMPORARY MEDIUM HANDOVER - A system and method are disclosed that reduce collisions on a wireless medium shared by devices associated with a wireless network, thereby improving throughput on the wireless medium. For some embodiments, a first device reserves access to the medium for a first interval, and then grants medium access to a second device for a remainder of the first interval. If the second device transmits data during the remainder of the first interval, medium access is maintained with the second device and then the second device is prevented from contending for medium access during a subsequent contention period. Otherwise, medium access is returned to the first device and the second device is allowed to contend for medium access during the contention period. | 05-08-2014 |
20140160947 | Method And System for Unified Rate Adaptation For SU-BF And MU-MIMO Operation - A method of providing rate adaptation in a multi-user wireless communication system including single-user beamforming (SU-BF) and multi-user multiple-input multiple-output (MU-MIMO) is described. In this method, a master rate, which is a modulation and coding scheme (MCS) for the SU-BF, is determined. An MCS for each transmit mode is derived from the master rate using a rate mapping. Using the results from the mapping, the master rate, instead of the MCS for each transmit mode, is tracked. In one embodiment, a mapping calibration is periodically performed. | 06-12-2014 |
20140198724 | SYSTEMS AND METHODS FOR FORMATTING FRAMES IN NEIGHBORHOOD AWARE NETWORKS - Systems and methods for formatting frames in neighborhood aware networks are described herein. One aspect of the subject matter described in the disclosure provides a method of communicating in a wireless neighborhood aware network (NAN). The method includes determining at least one connection setup information element indicating one or more connection parameters of the NAN. The method further includes determining at least one service identifier of the NAN. The method further includes generating a public action discovery frame comprising the at least one connection setup information element and the at least one service identifier. The method further includes transmitting, at a wireless device, the public action discovery frame. | 07-17-2014 |
20140198725 | SYSTEMS AND METHODS FOR FORMATTING FRAMES IN NEIGHBORHOOD AWARE NETWORKS - Systems and methods for formatting frames in neighborhood aware networks are described herein. One aspect of the subject matter described in the disclosure provides a method of communicating in a wireless neighborhood aware network (NAN). The method includes determining a discovery period. The method further includes generating a discovery window information element indicating a start time of a discovery window. The method further includes generating a NAN beacon or other sync frame comprising the discovery period and the discovery window information element. The method further includes transmitting, at a wireless device, the NAN beacon or other sync frame during the discovery window. | 07-17-2014 |
20140211659 | SYSTEMS AND METHODS FOR MONITORING THE SIZE OF A WIRELESS NETWORK - Systems and methods for monitoring the number of neighboring wireless devices in a wireless network are described herein. In one aspect, the method includes receiving a message from one of the neighboring wireless devices having an identifier associated with the neighboring wireless device and adding the identifier into a Bloom filter. The method may further include estimating the number of distinct strings that have been added into the Bloom filter based on the number of zeros in the Bloom filter, the number of distinct strings representing an estimate of the number of neighboring wireless devices in the wireless network. | 07-31-2014 |
20140254426 | SYSTEMS AND METHODS FOR SYNCHRONIZATION WITHIN A NEIGHBOR AWARE NETWORK - Methods, apparatus, and computer readable storage mediums for enabling reduced power consumption in wireless devices operating in a neighbor aware network are disclosed. In one aspect, a method includes generating a first message, the first message indicating beacon transmit window information, the beacon transmit window information indicating a first time interval when one or more beacon messages are transmittable, and transmitting the first message on the neighbor aware network. | 09-11-2014 |
20140254479 | SYSTEMS AND METHODS FOR DISCOVERING DEVICES IN A NEIGHBORHOOD AWARE NETWORK - Methods, devices, and computer program products communicating discovery information in a wireless neighborhood aware network (NAN). One method includes receiving a message from a neighboring wireless device. The message includes an identifier associated with the neighboring wireless device. The method further includes adding the identifier to a data structure indicative of discovered device identifiers. The method further includes transmitting a message including the data structure indicative of discovered device identifiers. | 09-11-2014 |
20140254513 | SYSTEMS AND METHODS FOR DISCOVERING DEVICES IN A NEIGHBORHOOD AWARE NETWORK - Methods, devices, and computer program products communicating discovery information in a wireless neighborhood aware network (NAN). One method includes receiving, at a first wireless device, a message from a neighboring wireless device. The message includes a data structure indicative of discovered device identifiers. The method further includes determining whether the data structure indicates an identifier of the first wireless device. The method further includes transmitting a message including the identifier of the first wireless device when the data structure does not indicate the identifier of the first wireless device. | 09-11-2014 |
20140254569 | SYSTEMS AND METHODS FOR DISCOVERING AND SYNCHRONIZING WITHIN A NEIGHBOR AWARE NETWORK - Methods, devices, and computer program products for optimization of message transmission intervals in a NAN are described herein. In one aspect, a method for discovering a cluster of STA's forming a NAN is provided. The method includes generating a NAN beacon at an access point (AP). The NAN beacon includes timing information for the NAN. The timing information indicates a first time interval when one or more messages can be transmitted within the NAN. The method further includes transmitting the NAN beacon. | 09-11-2014 |
20140293851 | SYSTEMS AND METHODS FOR SYNCHRONIZATION WITHIN A NEIGHBORHOOD AWARE 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 determining at least one of a time for exiting and a time for entering a low power sleep mode to utilize a discovery window is provided. The method includes determining an earliest possible start time of a discovery window according to a clock at the first device. The method further includes transitioning from the low power sleep mode to a higher power active mode approximately at the determined earliest possible start time, wherein the determined earliest possible start time is based at least in part on a clock drift value associated with the first device and a clock drift value associated with a second device of the wireless network. | 10-02-2014 |
20140293991 | SYSTEMS AND METHODS FOR SYNCHRONIZATION WITHIN A NEIGHBORHOOD AWARE 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 one or more synchronization messages, each synchronization message having timing information and a cluster identifier, the timing information comprising anchor timing information, the cluster identifier being the same value as a cluster identifier of the apparatus. The method further includes determining whether a difference between a time value when a received synchronization message last received anchor timing information and a time value maintained for the apparatus is greater than a threshold. The method further includes discarding the received synchronization message if the difference exceeds the threshold. | 10-02-2014 |
20140293992 | SYSTEMS AND METHODS FOR SYNCHRONIZATION WITHIN A NEIGHBORHOOD AWARE 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 initiating a contention based process for transmitting a synchronization message during a discovery time interval of a discovery time period. The synchronization message includes a first timestamp of the wireless communication apparatus. The method further includes selectively transmitting the synchronization message based on a master preference value of the wireless communication apparatus. | 10-02-2014 |
20140301190 | SYSTEMS AND METHODS FOR COLLISION MANAGEMENT IN A NEIGHBORHOOD AWARE NETWORK - Methods, devices, and computer program products for collision management of wireless devices in a peer-to-peer network are described herein. In one aspect, a method of communicating via a wireless medium by a wireless communications apparatus within a network is provided. The method includes determining first and second contention windows. The first contention window begins earlier than the second contention window. The method further includes beginning a first carrier sense multiple access (CSMA) countdown at the start of the first contention window. The method further includes beginning a second CSMA countdown when the first CSMA countdown does not end before the start of the second contention window. The method further includes transmitting the prepared frame at a time of the first CSMA countdown ending or the second CSMA countdown ending, whichever is earlier. | 10-09-2014 |
20140301295 | SYSTEMS AND METHODS FOR COLLISION MANAGEMENT IN A NEIGHBORHOOD AWARE NETWORK - Methods, devices, and computer program products for collision management of wireless devices in a peer-to-peer network are described herein. In one aspect, a method of communicating via a wireless medium by a wireless communications apparatus within a neighborhood aware network is provided. The network is configured with periodic discovery windows, and sized for a maximum number of devices M. The method includes determining a discovery window interval K, the smallest integer greater than or equal to one, such that the probability that more than a threshold M devices will transmit during the same discovery window is less than a threshold probability P. The method further includes selecting a random or pseudo-random integer m in the range from 0 to K−1, deferring for at least m discovery windows after a previous interval K−1 has elapsed, and transmitting a discovery frame during the next discovery window after said deferring. | 10-09-2014 |
20140341073 | METHOD AND METRICS FOR MERGING WITH A NEIGHBORHOOD AWARE NETWORK - Methods, apparatuses, and computer program products for the selection, identification, and comparison of metrics used by a wireless device within range of a plurality of wireless communication systems, such as neighborhood aware networks, to determine which wireless communication system provides the desired capabilities and services. These metrics can be dynamically selected by a device and implemented for software decision making as additional wireless communication systems with new, different, or better characteristics fall within range of a given wireless device. | 11-20-2014 |
20140341098 | ACCESS POINT RESPONSE TO PS-POLL - Methods, systems, and devices are described for power conservation in a wireless communications system through efficient transmissions and acknowledgements of information between an AP and a station. The time between a determination by a station to enter a power saving mode and entering network sleep mode by the station may be reduced through a transmission, by an AP, of an MPDU to the station successive to an SIFS after transmission of an acknowledgement to the station of a PS-Poll frame from the station. The time to enter a power saving mode by a station may also be reduced through transmission of A-MPDUs in which a last MPDU of the A-MPDU has an indicator bit cleared to indicate no additional data is to be transmitted. An AP may prevent a retransmission of an MPDU to the station in the absence of an acknowledgement from the station, to further enhance efficiency. | 11-20-2014 |
20140341099 | ACCESS POINT RESPONSE TO PS-POLL - Methods, systems, and devices are described for power conservation in a wireless communications system through efficient transmissions and acknowledgements of information between an AP and a station. The time between a determination by a station to enter a power saving mode and entering network sleep mode by the station may be reduced through a transmission, by an AP, of an MPDU to the station successive to an SIFS after transmission of an acknowledgement to the station of a PS-Poll frame from the station. The time to enter a power saving mode by a station may also be reduced through transmission of A-MPDUs in which a last MPDU of the A-MPDU has an indicator bit cleared to indicate no additional data is to be transmitted. An AP may prevent a retransmission of an MPDU to the station in the absence of an acknowledgement from the station, to further enhance efficiency. | 11-20-2014 |
20150063330 | AGGREGATION OF DATA PACKETS FOR MULTIPLE STATIONS - As one example, an apparatus for wireless communications includes a processing system configured to communicate with several receivers including a first receiver and a second receiver. The processing system is configured to generate an aggregate data packet including several data packets that include a first data packet and a second data packet. The first data packet is destined for the first receiver and the second data packet is destined for the second receiver. The aggregate data packet includes a delimiter that includes a group identifier for determining, at the first receiver, that at least one of the data packets, including the first data packet, is destined for the first receiver. The group identifier is also for determining, at the second receiver, that at least one of the data packets, including the second data packet, is destined for the second receiver. | 03-05-2015 |
20150071084 | SYSTEM AND METHOD FOR INFORMATION VERIFICATION BASED ON CHANNEL AWARENESS - This disclosure describes techniques for operating a client device to communicate with a wireless access point to validate data within a frame by comparing channel quality metrics and duration metrics to thresholds. Information received within a validity window may be treated as correctly received even if the frame fails a subsequent verification process or if reception of the frame is terminated prior to the end of the frame. | 03-12-2015 |
20150282005 | LINK AGGREGATION IN WIRELESS LOCAL AREA NETWORKS - Methods, systems, and devices are described for establishing a virtual communication link including at least a first and second physical link between two devices. A single virtual packet queue of a device may receive one or more data packets to be transmitted via the virtual communication link. The single virtual packet queue may attach a virtual sequence number to each of the one or more data packets and send the one or more data packets to one or more of the first or the second physical link according to the assigned virtual sequence numbers. The one or more packets may then be communicated via the first and/or second physical links according to link specific sequence numbers, such as medium access control (MAC) sequence numbers, assigned to the one or more data packets by the first and/or second physical links. | 10-01-2015 |
20150350385 | AGGREGATION OF DATA PACKETS FOR MULTIPLE STATIONS - As one example, an apparatus for wireless communications includes a processing system configured to communicate with several receivers including a first receiver and a second receiver. The processing system is configured to generate an aggregate data packet including several data packets that include a first data packet and a second data packet. The first data packet is destined for the first receiver and the second data packet is destined for the second receiver. The aggregate data packet includes a delimiter that includes a group identifier for determining, at the first receiver, that at least one of the data packets, including the first data packet, is destined for the first receiver. The group identifier is also for determining, at the second receiver, that at least one of the data packets, including the second data packet, is destined for the second receiver. | 12-03-2015 |
20150381322 | SYSTEM AND METHOD FOR INFORMATION VERIFICATION BASED ON CHANNEL AWARENESS - This disclosure describes techniques for operating a client device to communicate with a wireless access point to validate data within a frame by comparing channel quality metrics and duration metrics to thresholds. Information received within a validity window may be treated as correctly received even if the frame fails a subsequent verification process or if reception of the frame is terminated prior to the end of the frame. | 12-31-2015 |
20160105902 | TRANSMISSION COORDINATION FOR COLLOCATED RADIOS - Methods, systems, and devices are described for wireless communication at a wireless device having collocated radios employing different radio access technologies (RATs). For example, a second radio of the wireless device may receive a first scheduling message. The first scheduling message may include information relating to timing, priority, transmission power, and radio capabilities. Using this scheduling message, a determination of whether a first radio employing a first RAT and the second radio employing a second RAT can transmit in parallel may be made. A first transmission on the first radio may be coordinated with a second transmission on the second radio based on the determination of whether the first radio and the second radio can transmit in parallel. A number of data units may be aggregated into an aggregate frame to be transmitted by the second radio. The number of data units may be based on the scheduling message. | 04-14-2016 |