Patent application number | Description | Published |
20090252100 | METHODS AND APPARATUS FOR REVERSE LINK ACKNOWLEDGEMENT IN A WIRELESS LOCAL AREA NETWORK (WLAN) - Methods and apparatus for reverse link acknowledgement in a wireless local area network. A method includes receiving, at a first node, a data communication over a common channel, the data communication being decodable by other nodes. The method also includes determining transmission resources from the data communication, wherein the transmission resources are different for each node, and transmitting a response over the common channel using the determined transmission resources. An apparatus includes a transmitter configured to transmit to a plurality of nodes a data communication over the common channel, and a receiver configured to receive responses from the plurality of nodes, wherein each response was sent using different transmission resources determined from the data communication. | 10-08-2009 |
20090252110 | METHOD AND APPARTUS FOR EXTENDED REVERSE DIRECTION GRANT IN A WIRELESS LOCAL AREA NETWORK (WLAN) - Methods and apparatus for extended reverse direction grant in a WLAN. In an aspect, a method includes transmitting data within a transmit interval to a plurality of the nodes, wherein the data comprises a first indicator. The method also includes receiving, in response to the first indicator, a data transmission from at least one of the nodes, wherein the data transmission was transmitted using a selected transmission resource and is received within the transmit interval. In an aspect, an apparatus includes a receiver to receive, within a time interval, first data over a common channel, the first data being decodable by other nodes. The apparatus also includes a controller to determine whether the first data comprises a first indicator, and a transmitter to transmit second data within the time interval using selected transmission resources, if the first data comprises the first indicator. | 10-08-2009 |
20090252145 | Method and Apparatus for Scheduling in a Wireless Network - Techniques for scheduling flows and links for transmission are described. Each link is an oriented source-destination pair and carries one or more flows. Each flow may be associated with throughput, delay, feedback (e.g., acknowledgments (ACKs)) and/or other requirements. A serving interval is determined for each flow based on the requirements for the flow. A serving interval is determined for each link based on the serving intervals for all of the flows sent on the link. Each link is scheduled for transmission at least once in each serving interval, if system resources are available, to ensure that the requirements for all flows sent on the link are met. The links are also scheduled in a manner to facilitate closed loop rate control. The links are further scheduled such that ACKs for one or more layers in a protocol stack are sent at sufficiently fast rates. | 10-08-2009 |
20090290616 | METHOD AND APPARATUS FOR DETERMINING THE SPATIAL CHANNELS IN AN SPATIAL DIVISION MULTIPLE ACCESS (SDMA)-BASED WIRELESS COMMUNICATION SYSTEM - An access point is disclosed herein that comprises a wireless network adapter configured to support a backhaul connection for a peer node to a network; a processing system configured to calculate precoding matrices that define spatial streams; and a transceiver configured to transmit data to the nodes on the spatial streams. | 11-26-2009 |
20100046457 | METHODS AND APPARATUS FOR SCHEDULING WIRELESS TRANSMISSIONS - Certain embodiments provide a method for scheduling packet transmissions in a wireless communications with stations that support spatial division multiple access (SDMA) transmissions. The method generally includes receiving channel state training signals from a plurality of wireless network nodes, constructing a schedule for uplink and downlink packet transmissions for the nodes based on the channel state training signals, and communicating the schedule to the nodes. | 02-25-2010 |
20100046482 | MULTI-CHANNEL SDMA - Certain embodiments provide a method for scheduling packet transmissions in a multi-channel wireless communications system. The method generally includes requesting, from a plurality of wireless network nodes, an identification of channels available for communicating with the wireless network nodes, receiving an identification of channels available for communicating with the wireless network nodes, determining a schedule for packet transmission for the wireless network nodes based on the identification of channels, and communicating the schedule to the wireless network nodes. | 02-25-2010 |
20100046492 | METHOD AND APPARATUS TO PERFORM RANGING OPERATIONS FOR WIRELESS STATIONS - Certain embodiments provide methods and apparatus for adjusting timing in an SDMA system. One method for adjusting the timing of packet transmissions in a wireless communications system, that may be performed by an access point, includes receiving ranging signals from a plurality of wireless network nodes, determining timing adjustment information for adjusting starting timing of packet transmissions from the wireless network nodes based on the ranging signals, and communicating the timing adjustment information to the wireless network nodes. | 02-25-2010 |
20100050054 | EFFECTIVE UTILIZATION OF HEADER SPACE FOR ERROR CORRECTION IN AGGREGATE FRAMES - An apparatus for wireless communications is disclosed that includes a processing system configured to generate a first data packet and thereafter a second data packet, wherein each of the first and second data packets including a header and data, the processing system being further configured to generate an error correction code associated with the first data packet and embed the error correction code in the header of the second data packet. | 02-25-2010 |
20100054230 | MULTICHANNEL TDMA MECHANISM - An apparatus and method for communications are disclosed. The apparatus may include a transceiver, and a processing system configured to dynamically allocate a plurality of channels to one or more nodes prior to a data transmission from the transceiver to the one or more nodes. | 03-04-2010 |
20100182929 | TRANSMISSION CONTROL FOR WIRELESS COMMUNICATION NETWORKS - Techniques for controlling transmissions in wireless communication networks are described. In one aspect, transmission control for a mesh network may be achieved by ranking mesh points or stations in the mesh network. In one design, the rank of a first station in the mesh network may be determined. At least one station of lower rank than the first station in the mesh network may be identified. At least one transmission parameter for the at least one station of lower rank may be set by the first station. At least one transmission parameter value may be selected for each station based on the rank, QoS requirements, amount of traffic, and/or achievable data rate for that station and may be sent (e.g., via a probe response message) to the station. | 07-22-2010 |
20100220601 | METHOD AND APPARATUS FOR SCHEDULING TRANSMISSIONS IN SPATIAL DIVISION MULTIPLE ACCESS NETWORK SYSTEMS - An apparatus for communications including a processing system configured to generate a plurality of spatial streams for communicating with a plurality of nodes, the processing system being further capable of determining an allocation of the spatial streams to each of the nodes based on at least one metric for each of the nodes. | 09-02-2010 |
20100220679 | METHODS AND APPARATUSES FOR SCHEDULING UPLINK REQUEST SPATIAL DIVISION MULTIPLE ACCESS (RSDMA) MESSAGES IN AN SDMA CAPABLE WIRELESS LAN - An apparatus for wireless communications, including a processing system configured to receive requests for a spatial division multiplexed transmission from a plurality of nodes over a multiple access medium; and initiate the spatial division multiplexed transmission based on a metric related to one or more of the nodes, is disclosed. Another apparatus for wireless communications, including a processing system configured to generate data belonging to an access class having contention parameters; and precode at least a portion of the data for transmission over a spatial stream and enter into post backoff following the spatial stream transmission, is also disclosed. Methods for using the apparatuses are also disclosed. | 09-02-2010 |
20100220813 | PROTOCOL OPERATION AND MESSAGE DESIGN FOR SDMA DATA TRANSMISSION TO A PLURALITY OF STATIONS - An apparatus including a processing system configured to construct a coding matrix from channel state information and encode a plurality of spatial streams with the coding matrix for transmission to one or more nodes. A method for performing the process is also disclosed herein. | 09-02-2010 |
20100284312 | SYNCHRONIOUS MULTI-CHANNEL TRANSMISSIONS IN WIRELESS LOCAL AREA NETWORKS - Certain aspects of the present disclosure relate to a method for synchronous multi-channel transmissions in wireless local area networks. An access point can change allocation of its transmit and receive chains across multiple frequency bands ensuring that both uplink and downlink transmissions are properly performed for each station in a wireless system | 11-11-2010 |
20100284393 | ENHANCED MULTICHANNEL ACCESS FOR VERY HIGH THROUGHPUT - Certain aspects of the present disclosure relate to a method for enhanced multichannel access where multiple simultaneous transmissions can occur each spanning a subset of frequency bands. | 11-11-2010 |
20100322166 | MULTI-USER MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATIONS - Certain aspects of the present disclosure relate to a method for enhanced multi-user multiple input multiple output (MU-MIMO) wireless communications. The proposed method may reduce and/or eliminate stringent frequency and time synchronization requirements for stations (STAs) to participate in a downlink MU-MIMO transaction by utilizing deterministic scheduling. | 12-23-2010 |
20100329195 | METHOD AND APPARATUS FOR MULTI-STATION REQUEST MESSAGING - A process for wireless communications is disclosed herein that includes specifying transmission parameters for a plurality of wireless nodes in a single frame; and transmitting the single frame. An apparatus for performing the process is also disclosed herein. | 12-30-2010 |
20100329236 | METHOD AND APPARATUS FOR MULTIPLE USER UPLINK REQUIRING MINIMAL STATION TIMING AND FREQUENCY SYNCHRONIZATION - An apparatus is disclosed having a receiver configured to receive correction information; and a transmitter configured to transmit data based on the correction information through one or more antennas to one or more nodes. A method for wireless communications is also disclosed. The method includes sending correction information to a plurality of wireless nodes; receiving corrected data generated by at least one station of the plurality of wireless nodes based on the correction information; and spatially processing the corrected data. | 12-30-2010 |
20100330918 | INTERFERENCE MANAGEMENT - An apparatus for wireless communication is provided including a processing system. The processing system is configured to determine potential interference from communications with a first wireless node within a first coverage area through a first wireless interface, and to manage the potential interference when communicating with a neighboring apparatus within a second coverage area through a second wireless interface. The second coverage area is greater than the first coverage area and the neighboring apparatus is outside the first coverage area. | 12-30-2010 |
20100331056 | POWER MANAGEMENT - An apparatus for wireless communications includes a processing system. The processing system is configured to turn off a first wireless interface configured to support communications within a first coverage area. The processing system is further configured to communicate with a second apparatus using a second wireless interface configured to support communications within a second coverage area greater than the first coverage area. The processing system is further configured to turn on the first wireless interface based on the communication with the second apparatus. | 12-30-2010 |
20110002227 | MULTIUSER SCHEDULING IN WLAN SYSTEMS - An apparatus for wireless communications is provided including a processing system. The processing system is configured to determine path-losses between the apparatus and a plurality of wireless nodes, to group the plurality of wireless nodes into sets based on the determined path-losses, and to exchange data with at least one of the wireless nodes in one of the sets. | 01-06-2011 |
20110007640 | MULTIPLE PEER-TO-PEER SIGNALING - A method, an apparatus, and a computer program product operable in a wireless communication system are provided in which a first signal is generated for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern. A second preferred beam pattern is determined from a second signal received from the wireless node. The apparatus communicates with the wireless node through at least one of the first or second preferred beam pattern. | 01-13-2011 |
20110007676 | MULTIPLE PEER-TO-PEER SIGNALING - A method, an apparatus, and a computer program product operable in a wireless communication system are provided in which a first signal is generated for transmission to a wireless node to enable the wireless node to determine a first preferred beam pattern. A second preferred beam pattern is determined from a second signal received from the wireless node. The apparatus communicates with the wireless node through at least one of the first or second preferred beam pattern. | 01-13-2011 |
20110007721 | METHOD FOR DIRECTIONAL ASSOCIATION - A method, an apparatus, and a computer program product operable in a wireless communication system are provided in which an access probe is generated for transmission to a wireless node. A first signal is generated for transmission to the wireless node. The first signal includes information corresponding to a first preferred beam pattern from the wireless node to the apparatus. A second signal is received from the wireless node including information corresponding to a second preferred beam pattern from the apparatus to the wireless node. The second preferred beam pattern is determined based on the access probe. The apparatus communicates with the wireless node using at least one of the first preferred beam pattern or the second preferred beam pattern. | 01-13-2011 |
20110051647 | METHOD AND APPARATUS FOR MULTIPLE-USER COMMUNICATION IN A CLIENT INITIATED COMMUNICATION TRANSMISSION SCHEME - An apparatus is disclosed having a receiver configured to receive a request to transmit data from a wireless node in a plurality of wireless nodes; and a transmitter configured to transmit a multi-cast message to a set of wireless nodes in the plurality of wireless nodes to permit data transmission. A method for wireless communications is also disclosed. | 03-03-2011 |
20110103240 | METHOD FOR FORWARDING IN PEER-TO-PEER WIRELESS COMMUNICATIONS - Certain aspects of the present disclosure relate to a method for forwarding of data in peer-to-peer transactions by a high-capability wireless device, such as an access point. | 05-05-2011 |
20110103319 | ACCESS POINT SCHEDULED PEER-TO-PEER COMMUNICATION - Certain aspects of the present disclosure relate to a technique for scheduling multiple peer-to-peer communications in a wireless network using an access point (AP). The existing power management framework for AP-based communications is utilized to achieve AP-based scheduling of peer-to-peer communications. | 05-05-2011 |
20110122805 | METHOD AND APPARATUS FOR MANAGING CLIENT INITIATED TRANSMISSIONS IN MULTIPLE-USER COMMUNICATION SCHEMES - A method for wireless communications is disclosed that includes receiving a plurality of requests to transmit data from a plurality of apparatuses; determining resource allocation for a set of apparatuses in the plurality of apparatuses, wherein the determination is based on the plurality of requests; and transmitting a message comprising the resource allocation to the set of apparatuses to permit data transmission. Another method for wireless communications is disclosed that includes contending for access to a medium based on a request, by an apparatus, with a plurality of other apparatuses; receiving a message, the message comprising a resource allocation based on requests from the apparatus and the other apparatuses, wherein the resource allocation permits data transmission from the apparatus and some of the other apparatuses; and transmitting data by the apparatus based on the message. Apparatuses for performing the methods are also disclosed. | 05-26-2011 |
20110122849 | METHODS AND APPARATUS FOR PROVIDING SILENCE PERIODS IN DIRECTIONAL COMMUNICATIONS NETWORKS - A method of facilitating a silence period in a directional communication network is provided. The method may comprise initiating, by a first apparatus, a listening period mode, wherein the listening period mode comprises ceasing at least a portion of current communication and configuring the first apparatus to receive a request to initiate a new communication, determining whether a request is received during a time period in the listening period mode, and transmitting a response if the request to initiate the new communication is received during the time period in the listening period mode. | 05-26-2011 |
20110141969 | BACKOFF PROCEDURE FOR POST DOWNLINK SDMA OPERATION - Certain aspects of the present disclosure relate to a technique for decreasing a probability of post-backoff collisions that occur during uplink transmissions from multiple user stations (STAs) following completion of downlink transmission from an access point to the STAs. | 06-16-2011 |
20110216659 | MULTIUSER SCHEDULING IN WLAN SYSTEMS - An apparatus for wireless communications is provided including a processing system. The processing system is configured to determine path-losses between the apparatus and a plurality of wireless nodes, to group the plurality of wireless nodes into sets based on the determined path-losses, and to exchange data with at least one of the wireless nodes in one of the sets. | 09-08-2011 |
20110268054 | MULTI-USER UPLINK COMMUNICATION USING EDCA WITH POLLING - Simultaneous, multi-user uplink communication is scheduled in a wireless network by transmitting a poll message to a plurality of access terminals in response to receiving a first request to transmit data via uplink. The poll message includes a solicitation for requests to transmit data from each of the plurality of access terminals. The poll message also includes a medium reservation and schedule for transmission of the requests from the access terminals. Based on the requests received from the access terminals, a number of the access terminals are selected for simultaneous transmission of data via uplink. A transmit start message is sent to each of the selected access terminals indicating when and for how long the selected access terminals may transmit data via uplink. After the data is received, a block ACK message is sent to each of the selected access terminals indicating successful simultaneous communication. | 11-03-2011 |
20110274056 | PROTOCOL FOR COMMUNICATION - Various methods and apparatuses for transmitting an allocation of time in a wireless communication system are disclosed. In one aspect, allocations of time for receiving and transmitting control communications are determined. The control communications may comprise a channel time request. | 11-10-2011 |
20110287796 | Methods and Apparatus for Enabling a Channel Access Protocol for Directional Mac - A method and apparatus for providing a channel access protocol for use in a directional communication network is provided. The method may comprise transmitting channel access information to a plurality of apparatuses, receiving a first directional beam from a second apparatus of the plurality of apparatuses, wherein the first directional beam is determined by the second apparatus based on the received channel access information, determining a second directional beam based on the first directional beam, transmitting a channel reservation to the second apparatus using the second directional beam and establishing a communication session with the second apparatus based on the channel reservation. | 11-24-2011 |
20120117446 | PACKET-LEVEL ERASURE PROTECTION CODING IN AGGREGATED PACKET TRANSMISSIONS - In a first aspect, an aggregated packet (A-MPDU) includes packets (MPDUs) and EC-Blocks (Error Correction Blocks) containing error correction coding information. A transmitter uses a Fountain coding scheme (for example, Raptor or RaptorQ) to generate the error correction coding information from the MPDUs. If a receiver detects an error in a received MPDU, then the receiver uses the error correction coding information from the EC-Blocks to correct the error. In a second novel aspect, a determination is made as to whether a change in error rate is more likely due to collisions or to a low SNR. If the determination is that the change is due to collisions then the MCS index is adjusted to restore a target error rate, whereas if the determination is that the change is due to a low SNR then the number of EC-Blocks per A-MPDU is adjusted to restore the target error rate. | 05-10-2012 |
20120140754 | METHOD FOR DIRECTIONAL ASSOCIATION - A method, an apparatus, and a computer program product operable in a wireless communication system are provided in which an access probe is generated for transmission to a wireless node. A first signal is generated for transmission to the wireless node. The first signal includes information corresponding to a first preferred beam pattern from the wireless node to the apparatus. A second signal is received from the wireless node including information corresponding to a second preferred beam pattern from the apparatus to the wireless node. The second preferred beam pattern is determined based on the access probe. The apparatus communicates with the wireless node using at least one of the first preferred beam pattern or the second preferred beam pattern. | 06-07-2012 |
20130121243 | SYSTEMS AND METHODS FOR WIRELESS COMMUNICATION OF PACKETS HAVING A PLURALITY OF FORMATS - Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded. | 05-16-2013 |
20130121244 | SYSTEMS AND METHODS FOR WIRELESS COMMUNICATION OF PACKETS HAVING A PLURALITY OF FORMATS - Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded. | 05-16-2013 |
20130121245 | SYSTEMS AND METHODS FOR WIRELESS COMMUNICATION OF PACKETS HAVING A PLURALITY OF FORMATS - Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded. | 05-16-2013 |
20130128806 | SYSTEMS AND METHODS FOR WIRELESS COMMUNICATION OF PACKETS HAVING A PLURALITY OF FORMATS - Systems and methods for communicating packets having a plurality of formats are described herein. In some aspects, a signal (SIG) field in the preamble of a packet may indicate whether an extension field, such as an extension SIG field or SIG-B field, is included in the packet. In another aspect, one or more detectors may be used to auto-detect packets formatted as one of at least two different formats based on a short training field (STF) of a received packet. In some aspects, along training field (LTF) in the preamble of a packet may indicate whether the payload is repetition coded. | 05-23-2013 |
20130155971 | TRANSMITTER CHARACTERISTIC REPRESENTATION FOR TELEVISION WHITE SPACE - A method includes sending, from a wireless device, an information element including at least one transmitter characteristic field. The at least one transmitter characteristic field includes information regarding a spectral mask associated with the wireless device and information regarding an antenna gain associated with the wireless device. | 06-20-2013 |
20130176901 | DEVICE AND METHOD FOR COMMUNICATION OF MANAGEMENT INFORMATION IN AD-HOC WIRELESS NETWORKS - A method includes detecting, by a first device, a beacon sent from a second device. The beacon is associated with an ad-hoc wireless network. In response to detecting the beacon, the first device sends to the second device a request for management information associated with the ad-hoc wireless network. The request identifies at least a first information element associated with at least a first portion of the management information and a second information element associated with at least a second portion of the management information. The method further includes receiving from the second device a first wrapper information element that includes at least the first information element. | 07-11-2013 |
20130195089 | SUPER LONG RANGE (SLR) DEVICES AND LOW RATE ENABLER (LRE) DEVICES - A method includes generating, at a low rate enabler (LRE) device, a packet including a preamble having a legacy portion and a super long range (SLR) portion. The legacy portion includes at least one bit to indicate a presence of the SLR portion to at least one SLR-compatible device. The method also includes transmitting the packet to a plurality of devices includes the at least one SLR-compatible device. | 08-01-2013 |
20130227371 | BLOCK ACKNOWLEDGEMENT MECHANISM INCLUDING SEQUENCE NUMBER ACKNOWLEDGEMENT AND RETRY BIT - A method includes sending a sequence number acknowledgement (SN-ACK) from a first device to a second device. The SN-ACK identifies a last consecutively correctly received data unit and includes a retry bit indicating whether at least one data unit of the plurality of data units was received by the first device subsequent to the last consecutively correctly received data unit. The method also includes, when the retry bit has a first value, sending a block acknowledgement (BA) after sending the SN-ACK. The BA includes a bitmap, where each particular bit of the bitmap indicates whether a corresponding data unit was correctly received. When the retry bit has a second value and one or more of the plurality of data units were incorrectly received by the first device, the first device receives a retransmission of one or more data units without sending the BA to the second device. | 08-29-2013 |
20130250803 | SYSTEM AND METHOD OF INFRASTRUCTURE SERVICE DISCOVERY - A system and method of infrastructure service discovery is disclosed. In a particular embodiment, a method includes requesting an access point to issue an Internet protocol address reserved for service discovery messages. In another particular embodiment, a method includes generating a service query message at a mobile station and sending the service query message to an advertisement server via an uncontrolled port. In yet another particular embodiment, a method includes generating, at a mobile station, a layer 2 protocol query encapsulating at least a portion of a layer 3 protocol query in the layer 2 protocol query to generate a modified layer 2 protocol query. The layer 3 protocol query is associated with a service discovery request. The method further includes sending the modified layer 2 protocol query to an access point or to an information server via a wireless network. | 09-26-2013 |
20140112405 | METHODS AND APPARATUS FOR MANAGING WIRELESS MEDIUM UTILIZATION - Methods, apparatus, and computer readable medium manage the utilization of a wireless medium capable of transmitting multiple channels of data simultaneously. A plurality of messages are stored in a queue for transmission on the wireless medium. A wireless medium utilization for transmitting a first message over the multi-channel medium is determined. Each of the messages stored in the queue is delayed based at least in part on the determined wireless medium utilization. In some embodiments, a message may be delayed based at least in part on a state of a connection used by the message. For example, if the connection is in a ramp-up or slow start phase, the message may not be delayed. Messages may also be delayed based on a type of the message. For example, messages generated by interactive applications, such as web browsers or instant messaging applications may not be delayed. | 04-24-2014 |
20140355564 | REDUCING SIGNALING DURING AP TO AP HANDOFF IN DENSE NETWORKS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may be a STA. The STA communicating with a first AP based on a key. The STA receives an identifier broadcasted from a second AP. The STA determines whether the key can be used with the second AP based on the received identifier. The STA selects the second AP upon determining the key can be used with the second AP. The STA requests a transfer of association context information from the first AP to the second AP. The key may be a PTK. The PTK may be a function of the identifier. The identifier may be a zone identifier identifying a set of APs that belong to a security domain in which the association context information of the STA can be transferred from one AP to another AP. | 12-04-2014 |