Patent application number | Description | Published |
20150215818 | Dual-Stream Signal (SIG) Field Encoding with Higher Order Modulation - Signal (SIF) field capacity can be significantly increased by encoding SIG field data using two streams in accordance with a space-time block code (STBC) encoding scheme. Dual-stream SIG field encoding allows for the utilization of higher order modulation schemes, such as quadrature phase-shift keying (QPSK), which increases SIG field capacity. Dual-stream encoded SIG fields are transmitted using an omnidirectional beam to allow mobile stations to accurately decode the SIG field irrespective of their spatial location. | 07-30-2015 |
20150271704 | System and Method for Preambles in a Wireless Communications Network - A method for transmitting a frame includes generating an omni portion of the frame, the omni portion including a non-beamformed long training field and a signal field, the non-beamformed long training field including channel estimation information used to decode the signal field, the non-beamformed long training field configured to be transmitted through one of multiple antennas and multiple streams. The method also includes generating a multi-stream portion of the frame, the multi-stream portion including a data field and a multi-stream long training field, the multi-stream long training field including station-specific decoding information for station-specific data in the data field. The method further includes applying a beamforming indicator to the signal field of the omni portion, and transmitting the frame. | 09-24-2015 |
20150327217 | System and Method for Orthogonal Frequency Division Multiple Access Communications - A method for operating a communications device adapted for orthogonal frequency division multiple access (OFDMA) wireless local area network (WLAN) communications includes generating an OFDMA preamble comprising an OFDMA signal (SIG) field including an indication of an allocation of an OFDMA resource to a station, and transmitting the OFDMA preamble in a frame. | 11-12-2015 |
20150365203 | System and Method for Orthogonal Frequency Division Multiple Access (OFDMA) Resource Allocation - An orthogonal frequency division multiple access (OFDMA) frame includes a 256 tone payload. The 256 tone payload may consist of either 234 data tones when the payload is carried in a downlink transmission. The 256 tone payload may consist of 216 data tones when the payload is carried in an uplink transmission. In addition, the OFDMA frame may include one or more resource units (RUs). Each of the one or more RUs may consist of either an integer multiple of 26 data tones or an integer multiple of 24 data tones and 2 pilot tones. Another embodiment OFDMA frame comprises a symbol-based RU (SRU) that may include an integer multiple of 2 pilots tones and either an integer multiple of 24 data tones or an integer multiple of 26 data tones. | 12-17-2015 |
20150365257 | System and Method for OFDMA Resource Allocation - Channel estimation performance may be improved by including more long training fields (LTFs) in a frame than Institute of Electrical and Electronic Engineers (IEEE) technical standard (TS) 802.11ac requires for the number of space-time streams. This may be particularly advantageous in orthogonal frequency division multiple access (OFDMA) networks, as it may allow the LTF sections of frames carrying different numbers of space-time streams to be aligned in the time domain. | 12-17-2015 |
20150365922 | System and Method for OFDMA Tone Allocation in Next Generation Wi-Fi Networks - An orthogonal frequency division multiple access (OFDMA) frame tone allocation includes a 256 tone payload consisting of 228 data and pilot tones and 28 null tones. The 28 null tones consist of guard tones and at least one direct current (DC) tone. In one example, the 256 tone payload consists of 224 data tones, 4 common pilot tones, and 28 null tones. In another example, the 256 tone payload consists of 222 data tones, 6 common pilot tones, and 28 null tones. In yet another example, the 256 tone payload may consist of 220 data tones, 8 common pilot tones, and 28 null tones. The OFDMA frame may be a downlink OFDMA frame or an uplink OFDMA frame. | 12-17-2015 |
20150365947 | System and Method for Orthogonal Frequency Division Multiple Access - An embodiment OFDMA frame includes a header with signal (SIG) fields that are encoded at different sampling rates than one another. In one example, a first signal field is encoded at a 64 point fast frequency transform (FFT) sampling rate, and the second SIG field is encoded at a 256 point FFT sampling rate. The first SIG field may carry parameters for decoding the second SIG field, and the second SIG field may carry resource allocation information for a payload of the OFDMA frame. The first SIG field may carry an identifier of an access point that transmits the OFDMA frame. | 12-17-2015 |
20160050052 | System and Method for Orthogonal Frequency Division Multiple Access (OFDMA) Transmission - An OFDMA subframe carrying different data fields in different time segments may include a separate short training field (STF), and a separate set of long training fields (LTFs), for each of the data fields to accommodate time-reuse scheduling. Communicating a separate STF for each data field may allow receivers to re-adjust automatic gain control (AGC) when the data fields carry different numbers of space-time-streams Likewise, communicating separate sets of LTFs for each data field may allow different beamforming parameters to be applied to different data fields. | 02-18-2016 |
20160066313 | System and Method for Cumulative Beacons - A method for operating a first access point of a first plurality of access points comprising access points participating in cumulative beacon operations includes generating a cumulative beacon including basic service set identifiers (BSSIDs) and service set identifiers (SSIDs) of each access point in the first plurality of access points, and sending the cumulative beacon. | 03-03-2016 |
20160088637 | Systems and Methods for Interference Alignment in Wi-Fi - System and method embodiments are provided for interference alignment in a wireless local area network (LAN) with an overlapping basic service set (OBSS). In an embodiment, a method includes instructing a first access point (AP) in the wireless LAN to broadcast a null data packet (NDP) sounding packet to a plurality of stations when no other AP is broadcasting, wherein the NDP sounding packet comprises a plurality of long training field (LTFs), and wherein a total number of LTFs is equal to a total number of transmission streams, receiving channel beamforming (BF) information and a signal plus interference to noise ratio (SINR) from each of the stations, wherein each of the stations computes the channel BF information and the SINR from sounding packets received from each of the APs in the wireless LAN, and determining a transmission schedule according to the SINRs and the channel BF information. | 03-24-2016 |
20160105261 | System and Method for Space-Time Block Coded Communications - A method for wireless communications includes encoding a training sequence thereby producing an encoded training sequence, placing the encoded training sequence in a first part of a multi-part preamble, and transmitting the multi-part preamble using a first transmit antenna and a second transmit antenna. | 04-14-2016 |