Patent application number | Description | Published |
20110038332 | SDMA Multi-Device Wireless Communications - The present disclosure includes systems and techniques relating to wireless communications. A described system, for example, includes a device configured to transmit signals, in a frequency band, to the wireless communication devices. The signals can include spatially steered first signals that concurrently provide data to the wireless communication devices. The signals can include one or more second signals to the wireless communication devices to control transmission of responses from the wireless communication devices in the frequency band. The device can monitor for the responses in the frequency band. The device can control, based on a lack of reception of an expected response, a transmission of a third signal in the frequency band to prevent a transmission from another wireless communication device different than the wireless communication devices. The third signal can include information to reschedule a transmission of a response from a wireless communication device. | 02-17-2011 |
20110055558 | GALOIS/COUNTER MODE ENCRYPTION IN A WIRELESS NETWORK - A system includes a temporal key module, a nonce module, and a security module. The temporal key module is configured to generate a first temporal key. The first temporal key is to be used to encrypt a plurality of packets. The nonce module is configured to generate a nonce for each packet encrypted based on the first temporal key. Each nonce includes a packet number that is different than packet numbers associated with other nonces generated by the nonce module. The security module is configured to determine when the packet number included in the nonce generated by the nonce module is greater than or equal to a predetermined threshold. | 03-03-2011 |
20110069688 | Short Packet for Use in Beamforming - A method for generating a beamforming training (BFT) unit includes generating a physical layer (PHY) preamble of the BFT unit and generating a first encoding block and a second encoding block using PHY data and MAC data, including at least one of i) using a number of padding bits in a PHY layer of the BFT unit such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block, and ii) generating a MAC protocol data unit (MPDU) having a length such that the BFT unit consists of the PHY preamble, the first encoding block, and the second encoding block. | 03-24-2011 |
20110096796 | NUMBER OF STREAMS INDICATION FOR WLAN - In a method for generating a preamble of a data unit for transmission via a communication channel, an indication of a first number of spatial or space-time streams is included in a first field of the preamble. The first number of spatial or space-time streams corresponds to transmission of the data unit to a first receiver. One or more training sequences are included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted. | 04-28-2011 |
20110096797 | TRAINING SEQUENCE INDICATION FOR WLAN - In a method for generating a preamble of a data unit for transmission via a multiple input, multiple output (MIMO) communication channel, a first field of the preamble is generated. The first field provides a plurality of indicators to a plurality of receivers. Each one of the plurality of indicators indicates a set of a plurality of training sequences that corresponds to transmission of the data unit to a corresponding one of the plurality of receivers. The plurality of training sequences is included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted. | 04-28-2011 |
20110103280 | Power Saving in a Communication Device - A method in a communication device for processing a received data unit includes determining whether the communication device is an intended receiver based on the received data unit, determining whether the received data unit includes an exclusive use indication, where the exclusive use indication indicates that a plurality of data units are transmitted only to the at least one intended receiver during a time period, where each of the plurality of data units has at least a respective physical layer (PHY) preamble, and determining a time interval during which the communication device need not listen for incoming data units using (i) a result of determining whether the received data unit includes an exclusive use indication and (ii) a result of determining whether the communication device is an intended receiver. | 05-05-2011 |
20110116401 | Multi-Channel Wireless Communications - Systems and techniques relating to wireless communications are described. A described technique includes monitoring wireless communication channels, including a first channel and a second channel, to produce a monitoring output, determining a first transmission period for the first channel, determining a second transmission period for the second channel, transmitting, based on the first transmission period, a first packet on the first channel to cause one or more wireless communication devices to set a transmission protection period for the first channel and the second channel based on a reception of the first packet, transmitting, based on the second transmission period, a second packet on the second channel, and monitoring, after the end of the first transmission period, for one or more acknowledgements. An end of the second transmission period can be aligned with an end of the first transmission period. | 05-19-2011 |
20110128929 | Method and Apparatus for Sounding Multiple Stations - One or more stations to provide sounding feedback in response to a training signal sequence are determined, and a schedule for the one or more stations to provide sounding feedback is determined based on capabilities of the one or more stations to transmit sounding feedback at a defined time period after an end of the training signal sequence. A communication frame is generated that includes i) an indication of a request for the plurality of stations to provide sounding feedback corresponding to the training signal sequence, and ii) an indication of when the one or more stations are to transmit sounding feedback. The communication frame is transmitted along with the training sequence. | 06-02-2011 |
20110128947 | Method and Apparatus for Sounding Multiple Stations - A plurality of stations to provide sounding feedback in response to a training signal sequence is determined, and a communication frame is generated that includes i) an indication of a request for the plurality of stations to provide sounding feedback corresponding to the training signal sequence, and ii) information indicative of when each of the plurality of stations should transmit sounding feedback, and iii) sounding feedback parameters. The communication frame is transmitted along with the training sequence. | 06-02-2011 |
20110134816 | Wireless Communication Signaling for Aggregate Data Units - Systems and techniques relating to wireless communications are described. A described technique includes obtaining data for a transmission to a wireless communication device. The wireless communication device can be configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) data units. The technique includes, in a physical (PHY) frame, an aggregate data unit that is based on the data and the aggregate data unit format, the aggregate data unit including a single MAC data unit. The technique includes, in the PHY frame, an indication to signal that the MAC data unit in the aggregate data unit is singular and to cause the wireless communication device to accept the aggregate data unit without a corresponding block acknowledgement agreement. | 06-09-2011 |
20110134900 | Frame Padding For Wireless Communications - Systems and techniques relating to wireless communications are described. A described technique includes obtaining data for a transmission to a wireless communication device(s), including one or more medium access control (MAC) data units that encapsulate data in a physical (PHY) frame, determining a length of a MAC layer pad based on a number of symbols associated with the PHY frame, including, in response to the length of the MAC layer pad being greater than zero, the MAC layer pad in the PHY frame after the one or more MAC data units, determining a length of a PHY layer pad based on remaining available bits in the PHY frame, including, in response to the length of the PHY layer pad being greater than zero, the PHY layer pad in the frame after the MAC layer pad, and transmitting the PHY frame to the wireless communication device(s). | 06-09-2011 |
20110154039 | STATION-TO-STATION SECURITY ASSOCIATIONS IN PERSONAL BASIC SERVICE SETS - A personal basic service set (PBSS) includes a first device configured to communicate in the PBSS and a second device configured to communicate in the PBSS. The first device is configured to establish a robust security network association (RSNA) with the second device (i) without associating with a PBSS control point (PCP) and (ii) without associating with the second device. | 06-23-2011 |
20110194644 | Transmission Protection For Wireless Communications - Systems and techniques relating to wireless communications are described. A described technique includes identifying devices to receive spatially steered data frames during a transmission opportunity (TXOP), the data frames being included in a multi-user frame; transmitting, during the TXOP, request to send (RTS) information to the identified devices; receiving clear to send (CTS) responses from the identified devices; determining a bandwidth configuration for the multi-user frame based on the CTS responses; and transmitting, during the TXOP, the multi-user frame to the identified devices in accordance with the bandwidth configuration. The bandwidth configuration can indicate one or more frequency bands that are available during at least a portion of the TXOP. | 08-11-2011 |
20110243081 | Multi-User Communication Group Management And Signaling - Systems and techniques relating to wireless communications are described. A described technique includes generating one or more assignment records for a wireless communication device, generating an assignment message that includes the one or more generated assignment records, and transmitting the assignment message to cause the wireless communication device to initialize or update a multi-user group table based on the assignment message and filter one or more received multi-user transmissions based on the multi-user group table. The assignment message can indicate one or more group identifiers and one or more group member identifiers that are assigned to the wireless communication device and one or more group identifiers that are not assigned to the wireless communication device. | 10-06-2011 |
20110305156 | Method and Apparatus for Determining Channel Bandwidth - In a method implemented in a first communication device, a control frame having a bandwidth is generated. The control frame is transmitted via a first composite communication channel, wherein the first composite communication channel comprises a plurality of communication channels. A bandwidth of a response frame, received from a second communication device in response to transmitting the control frame, is determined. A second composite communication channel based on the bandwidth of the response frame is determined, wherein the second composite communication channel comprises at least one communication channel from the plurality of communication channels. One or more data frames are transmitted to the second communication device via the second composite communication channel. | 12-15-2011 |
20110305288 | Method and Apparatus for Determining Channel Bandwidth - In a method implemented in a communication device an available bandwidth for transmitting one or more data frames is determined, wherein the available bandwidth corresponds to a first composite communication channel comprising a plurality of communication channels. A control frame to indicate a request to transmit via the first composite communication channel is generated, wherein the control frame includes a header, and wherein a portion of the header includes information indicating the bandwidth of the first composite channel. The control frame is transmitted via the first composite communication channel, wherein at least the portion of the header is duplicated in a plurality of bandwidth portions of the first composite communication channel. | 12-15-2011 |
20120082045 | DETERMINING A COMMUNICATION CHANNEL FROM A PLURALITY OF POSSIBLE CHANNEL BANDWIDTHS - In a method of determining a set of communication channels for a first basic service set from at least i) a first set of channels and ii) a second set of channels, wherein each of at least some of the channels in the second set of channels partially overlaps, in frequency, at least one of the channels in the first set of channels, whether the second set of channels is being utilized by a second basic service set is determined. That the set of communication channels for the first basic service set includes either i) the first set of channels or ii) the second set of channels is determined based at least on a determination of whether the second set of channels is being utilized by the second basic service set. | 04-05-2012 |
20120082147 | DETERMINING A COMMUNICATION CHANNEL FROM A PLURALITY OF POSSIBLE CHANNEL BANDWIDTHS - In a method of determining an available channel bandwidth in a communication system, wherein the communication system utilizes i) a set of component channels for transmitting data streams and ii) a set of access control channels, and wherein each of at least some of the access control channels partially overlaps, in frequency, at least one of the component channels, whether a primary channel of the access control channels is idle is determined. The primary channel partially overlaps, in frequency, at least a first one of the component channels. That a composite channel includes one or more of the component channels is determined based at least on a determination of whether the primary channel is idle. A signal is caused to be transmitted via the composite channel after determining that the composite channel includes one or more of the component channels. | 04-05-2012 |
20120195391 | Physical Layer Frame Format for Long Range WLAN - In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, a first preamble portion and a data portion of the data unit is generated. The first preamble portion includes one or more long training fields. The first preamble portion and the data portion are modulated using a plurality of orthogonal frequency division multiplexing (OFDM) symbols. Symbol duration of each OFDM symbol is at least 8 μs. The data unit is generated to include the plurality of OFDM symbols. | 08-02-2012 |
20120201315 | Control Mode PHY for WLAN - A first preamble for a first data unit includes a first long training field and a first signal field modulated according to a first technique. The first data unit is generated according to a first data unit format and includes the first preamble. A second preamble, generated for a second data unit, includes a second signal field and a second long training field. Information in the second signal field is repeated and/or the second long training field is generated so that a duration of the second long training field is longer than a duration of the first long training field. A portion of the second signal field is modulated according to a second technique or a portion of the second long training field is modulated according to the second technique to signal to a receiver that the second data unit is formatted according to a second data unit format. | 08-09-2012 |
20120201316 | Control Mode PHY for WLAN - In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are encoded using a forward error correction (FEC) encoder. The information bits are mapped to a constellation symbols. Additionally, either the information bits are encoded according to a block coding scheme, or the constellation symbols are encoded according to the block coding scheme. Orthogonal frequency division multiplexing (OFDM) symbols are generated to include the constellation symbols and the PHY data unit is generated to include the OFDM symbols. | 08-09-2012 |
20120263084 | REDUCING POWER CONSUMPTION IN A WIRELESS COMMUNICATION SYSTEM - After transitioning a network interface of a first wireless communication device from a low power state to an active state, transmitting a request for a second wireless communication device to transmit data for the first wireless communication device that is buffered at the second wireless communication device. An indication of whether there is data for the first wireless communication device buffered at second wireless communication device is received. When there is data for the first wireless communication device buffered at second wireless communication device, data for the first wireless communication device that was buffered at the second wireless communication device is received from the second wireless communication device. | 10-18-2012 |
20120263085 | REDUCING POWER CONSUMPTION IN A WIRELESS COMMUNICATION SYSTEM - An indication that a network interface of a wireless communication device is in a low power state is received. Prior to receiving an indication that the network interface of the wireless communication device is no longer in the low power state, a data unit is received from the wireless communication device, wherein the data unit includes a request to transmit to the wireless communication device data for the wireless communication device that has been buffered while the wireless communication device is in the low power state. Responsive to the request, an indication of whether there is buffered data for the wireless communication device is transmitted. Additionally, when it is determined that there is buffered data for the wireless communication device, buffered data is transmitted to the wireless communication device. | 10-18-2012 |
20120263086 | REDUCING POWER CONSUMPTION IN A WIRELESS COMMUNICATION SYSTEM - A network interface of an access point device is configured to transmit to one or more first client stations in a first basic service set (BSS) a first value of a first parameter that indicates a time duration during which the access point device will not dissociate a client station due to not receiving at least one frame from the client station, and transmit to one or more second client stations in a second BSS a second value of the first parameter. The first value of the first parameter is at least an order of magnitude larger than the second value of the first parameter. | 10-18-2012 |
20120314636 | Efficient Transmission for Low Data Rate WLAN - In a method for facilitating power saving in a wireless network, a PHY header is generated to include an indication of a duration of a PHY data unit. A preamble is also generated. The PHY data unit is generated to include the preamble and the PHY header, and the PHY data unit is transmitted. | 12-13-2012 |
20120314653 | Efficient Transmission for Low Data Rate WLAN - A signal field is generated to include (i) a field to indicate that a physical layer (PHY) data unit is a control frame, and (ii) one or more of a frame control field, a receiver address (RA) field, and a cyclic redundancy check (CRC) field. A PHY data payload (i) that includes one or more of a service field, a transmitter address (TA) field, a network ID field, and a CRC field, and (ii) that omits an RA field is generated. The PHY data unit is generated to include (i) a preamble, (ii) a PHY header having the SIG field, and (iii) the PHY data payload. The PHY data unit is transmitted. | 12-13-2012 |
20120314695 | Efficient Transmission for Low Data Rate WLAN - A network interface device utilizes a physical layer (PHY) protocol data unit (PPDU) maximum duration such that, (A) when operating in a first mode of operation, a data unit (i) defined by a protocol in a layer above a PHY protocol in a protocol stack and (ii) having a maximum length defined by the protocol above the PHY protocol will fit entirely within a single PPDU at a lowest possible data rate in the first mode of operation, and (B) when operating in a second mode of operation, the data unit (i) defined by the protocol in the layer above the PHY protocol and (ii) having the maximum length defined by the protocol above the PHY protocol will not fit entirely within a single PPDU at a lowest possible data rate in the second mode of operation. | 12-13-2012 |
20120314696 | Efficient Transmission for Low Data Rate WLAN - It is determined whether basic service set (BSS) information has changed, and when it is determined that BSS information has changed, one or more first BSS information elements (IEs) that include at least some of the BSS information that has changed are generated. A shortened beacon frame is generated that (i) includes the one or more first BSS IEs, and (ii) omits one or more second BSS IEs that correspond to BSS information that has not changed. The beacon frame is transmitted. | 12-13-2012 |
20120314869 | PHYSICAL LAYER FRAME FORMAT FOR LONG RANGE WLAN - A preamble portion of a physical layer (PHY) data unit is generated for transmission via a long range communication protocol. A service field is generated with a length of eight or less bits. A data portion of the PHY data unit is generated to include the service field having the length of eight bits or less. | 12-13-2012 |
20130003683 | Sounding and Steering Protocols for Wireless Communications - Systems, apparatuses, and techniques relating to wireless local area network devices are described. A described technique includes transmitting a sounding packet to a wireless communication device(s) to determine characteristics of spatial wireless channels, the sounding packet being based on a spatial mapping matrix; receiving a feedback packet(s) from the device(s), the feedback packet(s) being indicative of one or more feedback matrices, the one or more feedback matrices being derived from wireless channel estimations that are based on received versions of the sounding packet; generating spatially steered data packets based on multiple data streams and one or more steering matrices, which are based on the spatial mapping matrix and the one or more feedback matrices; and transmitting a frame that includes the spatially steered data packets to the device(s). The spatially steered data packets can concurrently provide the streams respectively within the frame to the device(s) via different spatial wireless channels. | 01-03-2013 |
20130044607 | LONG RANGE WLAN DATA UNIT FORMAT - In a method for generating a control data unit a physical layer (PHY) preamble of the control data unit is generated. In generating the PHY preamble, an address field is generated to indicate a communication device for which the data unit is intended, and a frame type field is generated to indicate a type of the control data unit. The address field and the frame type field are included in the PHY preamble. The control data unit is generated to include the PHY preamble. The control data unit is transmitted. The control data unit omits (i) a MAC header, and (iii) a payload. | 02-21-2013 |
20130044687 | LONG RANGE WLAN DATA UNIT FORMAT - In a method for transmitting a data unit in a wireless communication network, a physical layer (PHY) preamble and a media access control layer (MAC) header are generated. In generating the MAC header, a first address field to include a first address and a second address field to include a second address are generated. The first, not globally unique, address indicates a communication device for which the data unit is intended or a communication device that is transmitting the data unit. The second address field indicates the other one of a communication device for which the data unit is intended or a communication device that is transmitting the data unit. The first address field and the second address field are included in the MAC header. The MAC header omits a globally unique address corresponding to the first address of the first address field. | 02-21-2013 |
20130044688 | LONG RANGE WLAN DATA UNIT FORMAT - In a method for generating a data unit for transmission in a wireless network, a physical layer (PHY) preamble is generated. A field to indicate whether an acknowledgment data unit is intended to follow the data unit is generated and included in the PHY preamble. A media access control layer (MAC) header is generated, and the data unit is generated to include the PHY preamble and the MAC header. The data unit is transmitted. | 02-21-2013 |
20130044742 | SIGNAL FIELD DESIGN FOR WLAN - A method of generating packets for transmission in a wireless communication system. The method comprises generating a data packet and generating a null data packet. Generating the data packet includes generating a data packet signal (SIG) field including a first data packet SIG subfield indicating a first physical layer (PHY) parameter to a receiving device. Generating the data packet also includes generating a data field. Furthermore, generating the null data packet includes generating a null data packet SIG field. The null data packet SIG field includes a first null data packet SIG subfield indicating a second PHY parameter to a receiving device. The data packet SIG field excludes any SIG subfield indicating the second PHY parameter to a receiving device, and (ii) the null data packet SIG field excludes any SIG subfield indicating the first PHY parameter to a receiving device. | 02-21-2013 |
20130044743 | SIGNAL FIELD DESIGN FOR WLAN - A method of generating packets for transmission in a wireless communication system, wherein each packet includes a SIG field that includes a first SIG subfield, includes generating a data packet and a null data packet. Generating the data packet includes generating information bits of the first SIG subfield of the data packet and generating the data portion of the data packet. The information bits of the first SIG subfield of the data packet indicate, to a receiving device, a length corresponding to a data portion of the data packet. Generating the null data packet includes generating information bits of the first SIG subfield of the null data packet. The information bits of the first SIG subfield of the null data packet indicate, to a receiving device, a first physical layer (PHY) parameter value associated with the null data packet. The first PHY parameter value is not a length value. | 02-21-2013 |
20130044877 | LONG RANGE WLAN DATA UNIT FORMAT - In a method for generating a data unit for transmission in a wireless network, a physical layer (PHY) preamble is generated. In generating the PHY preamble, a first indicator is generated to indicate at least one of (i) whether the data unit includes data offloaded from a mobile telephony network separate from the wireless network, or (ii) whether the data unit (a) was generated by, or (b) is addressed to, a communication device that supports offloading of data from the mobile telephony network to the wireless network. The first indicator is included in the PHY preamble. Additionally, a media access control layer (MAC) header is generated. The data unit is generated to include the PHY preamble and the MAC header. The data unit is then caused to be transmitted. | 02-21-2013 |
20130051260 | COEXISTENCE OF A NORMAL-RATE PHYSICAL LAYER AND A LOW-RATE PHYSICAL LAYER IN A WIRELESS NETWORK - A system including a physical layer module and a processing module. The physical layer module is configured to communicate at a first data rate via a channel, where the channel includes (i) a first sub-channel and (ii) a second sub-channel of the channel, to receive a first packet including a first preamble transmitted at the first data rate via (i) the first sub-channel and (ii) the second sub-channel, and to receive a second packet including a second preamble transmitted at a second data rate via (i) the first sub-channel or (ii) the second sub-channel, where the second data rate is less than the first data rate. The processing module is configured to process (i) the first preamble transmitted at the first data rate and (ii) at least a portion of the second preamble transmitted at the second data rate. | 02-28-2013 |
20130107833 | WLAN TRANSMIT MODES AND COEXISTENCE | 05-02-2013 |
20130128798 | 802.11 RESTRICTED ACCESS WINDOW - A method of operating an access point includes defining a restricted access window during which stations that belong to a same infrastructure basic service set as the access point are not allowed to transmit data frames. The method further includes generating a beacon announcing the restricted access window, and transmitting the beacon to the stations that belong to the same infrastructure basic service set as the access point. The method also includes, during the restricted access window, receiving a poll frame from a first station of the stations that belong to the same infrastructure basic service set as the access point. The method further includes, subsequent to the poll frame, transmitting a data frame to the first station. | 05-23-2013 |
20130177004 | INFORMATION BIT PADDING SCHEMES FOR WLAN - In a method for generating a data unit, a signal field is generated to include a first subfield having one of: a length indication to indicate a number of bytes in a data portion of the data unit, or a duration indication to indicate a number of OFDM symbols in the data portion of the data unit and a second subfield to indicate whether the first subfield includes the length indication or the duration indication. When the first subfield includes the length indication, one or more padding bits are added to a set of information bits according to a first padding scheme. When the first subfield includes the duration indication, one or more padding bits are added to the set of information bits to according to a second padding scheme. Padded information bits are encoded, and the data unit is generated to included the encoded information bits. | 07-11-2013 |
20130195001 | MAC Header Compression in Long-Range Wireless Local Area Networks - A method includes receiving, at or from a station STA, a plurality of packets. Each packet includes a set of flag bits, and a MAC header containing at least a first address field specifying a receiver address and a second address field specifying a transmitter address. The method also includes determining whether each set of flag bits indicates that the STA was associated with an AP when the respective packet was generated, and processing the MAC header of each packet. Processing the MAC header of each packet includes processing a third address field in each packet for which it is determined that the respective set of flag bits indicates that the STA was not associated with an AP when the respective packet was generated. The third address field contains a MAC address of the STA. | 08-01-2013 |
20130201835 | MULTI-CHANNEL WIRELESS COMMUNICATIONS - Systems and techniques relating to wireless communications are described. A described technique includes monitoring wireless communication channels, including a first channel and a second channel, to produce a monitoring output, determining a first transmission period for the first channel by applying a first waiting period duration and a second waiting period duration to the monitoring output, determining a second transmission period for the second channel by applying the first waiting period duration and the second waiting period duration to the monitoring output, causing, based on the first transmission period, a first transmission on the first channel to reserve the group of wireless communication channels; causing, based on the second transmission period, a second transmission on the second channel; and monitoring, after the end of the first transmission period, for an acknowledgement(s), An end of the second transmission period can be aligned with an end of the first transmission period. | 08-08-2013 |
20130208822 | Low Bandwidth PHY Transmission in a Wider Bandwidth - A method for generating signals to be transmitted within a BSS channel, where a set of component channels is collectively coextensive with the BSS channel, includes determining that a first duplicate, in frequency, of a low bandwidth mode data unit will be located at an edge of the BSS channel. Each duplicate includes OFDM tones and has a bandwidth less than the narrowest channel of the component channels. The OFDM tones in each duplicate include one or more data tones, one or more pilot tones, and one or more guard tones. The method also includes generating a transmission signal comprising the duplicates, at least in part by scaling down at least one data tone, and/or zeroing out at least one data tone, of the first duplicate in response to determining that the first duplicate will be located at an edge of the BSS channel. | 08-15-2013 |
20130242968 | PHYSICAL LAYER DATA UNIT FORMAT - A beamforming training (BFT) data unit for transmission via a communication channel in a wireless personal area network is generated, and in particular, is for transmitting beamforming training information. A physical layer header and first BFT data are encoded using block encoding to generate a first block. Second BFT data are encoded using block encoding to generate a second block. The BFT data unit is generated with a fixed-length payload, such that the BFT data unit includes only i) a preamble, ii) the first block, and iii) the second block. | 09-19-2013 |
20130272179 | Frame Padding For Wireless Communications - Systems and techniques relating to wireless communications are described. A described technique includes generating a physical frame and causing a transmission of the physical frame to the wireless communication device. The physical frame includes (i) one or more medium access control data units that encapsulate data for a wireless communication device, (ii) a medium access control layer pad that includes one or more padding delimiters, and (iii) a physical layer pad, wherein a length of the medium access control layer pad and a length of the physical layer pad are based on the physical frame. The one or more padding delimiters can include an end-of-frame flag to inform the wireless communication device to stop receiving a remaining portion of the physical frame. | 10-17-2013 |
20130286937 | METHOD AND APPARATUS FOR SCANNING MULTIPLE CHANNELS IN A WIRELESS NETWORK - A client station including a transceiver module, a scanning module, and an association module. The transceiver module is configured to transmit and receive data via a frequency band, where the frequency band includes a plurality of channels. The scanning module is configured to simultaneously scan multiple channels of the frequency band at the same time instead of scanning the plurality of channels of the frequency band one channel at a time, and to determine whether one or more access points are available for association in one or more of the multiple channels. The association module is configured to, in response to the scanning module determining that one or more access points are available for association, determine whether to associate with one of the one or more access points determined to be available for association. | 10-31-2013 |
20130315163 | FREQUENCY DOMAIN DUPLICATION IN A LONG-RANGE WIRELESS LOCAL AREA NETWORK - A method for generating OFDM signals is implemented in a device operating according to a communication protocol. The protocol defines non-duplicate mode data units corresponding to single component channels of a BSS channel, and non-duplicate mode data units corresponding to sets of adjacent component channels. Non-duplicate mode data units corresponding to a set of component channels have more lower-edge and/or upper-edge guard tones than non-duplicate mode data units corresponding to single component channels. The method includes determining that a duplicate mode will be utilized for an OFDM transmission in the set of component channels and, in response, generating a duplicate mode data unit. The duplicate mode data unit has fewer lower-edge and/or upper-edge guard tones than a non-duplicate mode data unit corresponding to a set of component channels, and includes one duplicate of the non-duplicate mode data unit corresponding to the single component channel for each adjacent component channel. | 11-28-2013 |
20130329627 | METHOD AND APPARATUS FOR RELAYING COMMUNICATION BETWEEN AN ACCESS POINT AND A STATION IN A WIRELESS NETWORK - A network including an access point, a client station, and a proxy station. The proxy station is configured to communicate with the access point during a first period. During the first period the proxy station is configured to receive, from the access point, downlink data intended for the client station, and transmit, to the access point, uplink data received from the client station and intended for the access point. The proxy station is further configured to communicate with the client station during a second period. During the second period the proxy station is configured to receive, from the client station, the uplink data intended for the access point, and transmit, to the client station, the downlink data intended for the client station. | 12-12-2013 |
20130329658 | METHOD AND APPARATUS FOR RESTRICTING CHANNEL ACCESS TO A WIRELESS STATION OPERATING IN ACCORDANCE WITH A POWER SAVING SCHEME - A wireless station includes a transceiver configured to wirelessly receive networking frames over a wireless medium, and a channel access counter configured to track a time period and signal that the time period has expired. The time period begins in response to a first networking frame of the networking frames. The first networking frame is addressed to a receiver other than the wireless station. A length of the time period is based on a first length in response to a type of the first networking frame being an acknowledgment frame type. The length of the time period is based on a second length in response to the type of the first networking frame being a data frame type. The transceiver is configured to wait to access the wireless medium until after the channel access counter signals that the time period has expired. | 12-12-2013 |
20140003315 | UNIFIED BEACON FORMAT | 01-02-2014 |
20140003323 | GROUP-BASED BEACONS | 01-02-2014 |
20140003384 | Sounding and Steering Protocols for Wireless Communications | 01-02-2014 |
20140003399 | USING DURATION FIELD IN BEACON TO RESERVE CHANNEL TIME SUBSEQUENT TO BEACON | 01-02-2014 |
20140010145 | Transmission Protection For Wireless Communications - Systems and techniques for wireless communication are described. A described technique includes performing, at a first device, a channel-clearing sequence with multiple second devices to protect a wireless communication neighborhood of the first device and wireless communication neighborhoods of the second devices for a transmission of a multi-user frame, the multi-user frame including spatially steered data frames that are respectively intended for the second devices; determining bandwidth availabilities for the second devices based on information received from the second devices during the channel-clearing sequence; selecting a bandwidth configuration for the multi-user frame based on the bandwidth availabilities to produce a selected bandwidth configuration that enables the data frames to be spatially steered and transmitted concurrently within the multi-user frame based on a common bandwidth availability among the second devices; and generating and transmitting the multi-user frame to the second devices in accordance with the selected bandwidth configuration. | 01-09-2014 |
20140029681 | CONTROL MODE PHY FOR WLAN - In a method for generating a physical layer (PHY) data unit for transmission via a communication channel, information bits to be included in the PHY data unit are encoded using a forward error correction (FEC) encoder. Also, the information bits are encoded according to a block coding scheme, where m copies of each bit are included in the information bits, and one or more bits in the m copies of each bit are flipped. The information bits are mapped to a plurality of constellation symbols, and a plurality of orthogonal frequency division multiplexing (OFDM) symbols are generated to include the plurality of constellation symbols. The PHY data unit is generated to include the plurality of OFDM symbols. | 01-30-2014 |
20140036895 | Wireless Communication Signaling For Aggregate Data Units - Systems and techniques relating to wireless communications are described. A described technique includes obtaining data for a transmission to a wireless communication device. The wireless communication device can be configured to process incoming transmissions based on an aggregate data unit format that specifies signaling for aggregating multiple medium access control (MAC) data units. The technique includes, in a physical (PHY) frame, an aggregate data unit that is based on the data and the aggregate data unit format, the aggregate data unit including a single MAC data unit. The technique includes, in the PHY frame, an indication to signal that the MAC data unit in the aggregate data unit is singular and to cause the wireless communication device to accept the aggregate data unit without a corresponding block acknowledgement agreement. | 02-06-2014 |
20140040618 | GALOIS/COUNTER MODE ENCRYPTION IN A WIRELESS NETWORK - A system including a nonce module and an encryption module. The nonce module is configured to generate a nonce for each packet of a plurality of packets to be encrypted using a first temporal key. Each nonce includes a packet number that is different than packet numbers associated with other nonces generated by the nonce module for the plurality of packets. The packet number is greater than N bits in length, where N is an integer greater than 40. The encryption module is configured to encrypt, without reusing a value of the packet number, more than 2 | 02-06-2014 |
20140050093 | Coexistence Support For Multi-Channel Wireless Communications - Systems and techniques relating to wireless communications are described. A described technique includes monitoring a group of wireless channels that are useable by at least a first wireless communication device for wireless communications, receiving one or more beacon signals from one or more second wireless communication devices, identifying, within the group of wireless channels, one or more primary channels on which the one or more beacon signals are received, estimating a traffic load for the one or more identified primary channels, determining, based on the estimated traffic load, whether to use as a primary channel for the first wireless communication device, a channel of the one or more identified primary channels or a channel of the group of wireless channels that is separate from the one or more identified primary channels; and selecting the primary channel for the first wireless communication device based on a result of the determining. | 02-20-2014 |
20140112317 | EFFICIENT AND FLEXIBLE TRANSMIT BEAMFORMING SECTOR SWEEP IN A MULTI-ANTENNA COMMUNICATION DEVICE - A method implemented in a communication device includes receiving a first beamforming training transmission corrupted by a collision, determining a first station to which the first beamforming training transmission corresponds based on the first beamforming training transmission corrupted by the collision, and in response to determining the first station, transmitting a signal to the first station to prompt the first station to transmit a second beamforming training transmission. | 04-24-2014 |
20140206304 | BEAMFORMING BY SECTOR SWEEPING - A first plurality of training data units are transmitted via a plurality of antennas of a first station as part of a first transmit beamforming training procedure. Subsequently, a second plurality of training data units are received via the plurality of antennas as part of second transmit beamforming procedure while the first station applies a single receive antenna configuration. The second plurality of training data units includes an information element that specifies a feedback from a second station, the feedback including an identifier corresponding to one of the training data units in the first plurality of data units. The first station transmits a feedback message to the second station, that includes (i) one or more indicators of one or more training data units selected from the second plurality of training data units, and (ii) a request to perform a subsequent beamforming training procedure. | 07-24-2014 |
20140241458 | Training Sequence Indication for WLAN - In a method for generating a preamble of a data unit for transmission via a multiple input, multiple output (MIMO) communication channel, a first field of the preamble is generated. The first field provides a plurality of indicators to a plurality of receivers. Each one of the plurality of indicators indicates a set of a plurality of training sequences that corresponds to transmission of the data unit to a corresponding one of the plurality of receivers. The plurality of training sequences is included in a second field of the preamble. The preamble is formatted such that the first field of the preamble will be transmitted prior to the second field of the preamble being transmitted. | 08-28-2014 |
20140269405 | Method and Apparatus for Determining Channel Bandwidth - In a method implemented in a communication device an available bandwidth for transmitting one or more data frames is determined, wherein the available bandwidth corresponds to a first composite communication channel comprising a plurality of communication channels. A control frame to indicate a request to transmit via the first composite communication channel is generated, wherein the control frame includes a header, and wherein a portion of the header includes information indicating the bandwidth of the first composite channel. The control frame is transmitted via the first composite communication channel, wherein at least the portion of the header is duplicated in a plurality of bandwidth portions of the first composite communication channel. | 09-18-2014 |
20140286203 | Channel sharing within wireless communications - A wireless communication device includes communication interface configured to receive and transmit signals and a processor configured to generate and process such signals. The communication interface of the wireless communication device is configured to receive a first signal from a first other wireless communication device, and the processor of the wireless communication device is configured to process the first signal to determine one or more concurrent transmission parameters. The processor of the wireless communication device is configured to generate the second signal based on the one or more concurrent transmission parameters and direct the communication interface to transmit the second signal to a second other wireless communication device during receipt of the first signal from the first other wireless communication device. The wireless communication device may be configured to make such concurrent transmissions based on one or more considerations such as the power level of the first signal. | 09-25-2014 |
20140286238 | Shared PLCP Protocol Data Unit (PPDU) within wireless communications - A wireless communication device is configured to generate frames based on any of a number of different frame formats for transmission to one or more other recipient wireless communication devices. The frame may be implemented to include data intended for two or more recipient devices. The device encodes first data intended for a first recipient device using first one or more coding parameters and encodes second data intended for a second recipient device using second one or more coding parameters. The manner by which the first and second data have been encoded is indicated within one or more other fields within the frames based on the selected frame format. In one example, a single preamble specifies the first and second one or more coding parameters. In another example, an initial preamble and one or more respective sub-preambles specify the first and second one or more coding parameters. | 09-25-2014 |
20140307653 | Multiple narrow bandwidth channel access and MAC operation within wireless communications - A wireless communication device is implemented to include a communication interface and a processor. The processor is configured to process communications associated with the other wireless communication devices within the wireless communication system to determine one or more traffic characteristics of those communications as well as one or more class characteristics of the other wireless communication devices. The processor is configured to classify the communications into one or more access categories based on the one or more traffic characteristics and is configured to classify the other devices into one or more device class categories based on the one or more class characteristics. The processor is then configured to generate one or more channel access control signals based on these classifications. The communication interface of the device is configured to transmit the one or more channel access control signals to one or more of the other devices. | 10-16-2014 |
20140314053 | Segmented Beamforming - A method for beamforming in a communication network includes generating a plurality of beamforming training (BFT) units associated with a beamforming session between a pair of devices, where each of the plurality of BFT units corresponds to a different beamsteering vector, causing a first non-zero subset of the plurality of BFT units to be transmitted during a first timeslot, and causing a second non-zero subset of the plurality of BFT units to be transmitted during a second timeslot, where the first time timeslot and the second timeslot are not contiguous. | 10-23-2014 |