公开(公告)号：WO2022020682A1

公开(公告)日：2022-01-27

申请号：PCT/US2021/042905

申请日：2021-07-23

Applicant: QUALCOMM INCORPORATED

Inventor： SHELLHAMMER, Stephen, Jay ,  VERMANI, Sameer ,  CHEN, Jialing Li ,  TIAN, Bin ,  ASTERJADHI, Alfred ,  SUN, Yanjun

IPC: H04W84/12 ,  H04B7/0452 ,  H04L27/26 ,  H04W72/12 ,  H04W72/14

Abstract: This disclosure provides methods, devices and systems for generating enhanced trigger frames. Some implementations more specifically relate to trigger frame designs that support gains in data throughput achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced trigger frame may be used to solicit a non-legacy trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data unit (PPDU) from one or more wireless stations (STAs). In some implementations, the enhanced trigger frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, an enhanced trigger frame may be configured in accordance with a legacy trigger frame format or a non-legacy trigger frame format. Thus, when configured in accordance with the legacy trigger frame format, the enhanced trigger frame can also be used to a legacy TB PPDU from one or more STAs.

公开(公告)号：WO2022005677A1

公开(公告)日：2022-01-06

申请号：PCT/US2021/035374

申请日：2021-06-02

Applicant: QUALCOMM INCORPORATED

Inventor： YANG, Lin ,  KIM, Youhan ,  TIAN, Bin

IPC: H04L25/03 ,  H04W28/06 ,  H04L25/03866 ,  H04L27/2617 ,  H04L69/08 ,  H04L69/22 ,  H04W74/008 ,  H04W74/0816 ,  H04W84/12

Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication that can be used to reduce the peak-to-average power ratio (PAPR) of data transmissions by increasing the degree of randomness with which data is scrambled for transmission over a wireless medium. In some implementations, a transmitting device may determine a scrambler seed value that includes at least 11 bits, where at least one of the 7 least significant bits (LSBs) of the scrambler seed value has a non-zero value. The transmitting device may generate a scrambling sequence based on the scrambler seed value and a polynomial, may construct a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes a multi-user (MU) request-to-send (RTS) frame and the scrambler seed value, may scramble one or more portions of the PPDU based on the scrambling sequence; and may transmit the PPDU over a wireless medium.

公开(公告)号：WO2021236727A1

公开(公告)日：2021-11-25

申请号：PCT/US2021/033092

申请日：2021-05-19

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Jialing Li ,  VERMANI, Sameer ,  TIAN, Bin

IPC: H04L27/26

Abstract: This disclosure provides methods, devices and systems for generating packet preambles. Some implementations more specifically relate to preamble designs that support gains in data throughput achievable in accordance with the IEEE 802.11be amendment, and future generations, of the IEEE 802.11 standard. Among other examples, the preamble designs of the present implementations may allow for more reliable packet detection, more accurate channel estimation, and more robust decoding of signal field (SIG) symbols. Additionally, or alternatively, the preamble designs of the present disclosure may be implemented with different lengths, modulation schemes, or transmit power compared to preamble designs that conform to existing versions of the IEEE 802.11 standard.

公开(公告)号：WO2021222713A1

公开(公告)日：2021-11-04

申请号：PCT/US2021/030105

申请日：2021-04-30

Applicant: QUALCOMM INCORPORATED

Inventor： SHELLHAMMER, Stephen, Jay ,  TIAN, Bin ,  RAISSINIA, Alireza ,  KIM, Youhan

IPC: H04W12/037 ,  H04L27/26 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for generating a secure long training field (LTF). In some implementations, the secure LTF may include a randomized bit sequence that is difficult, if not impossible, to replicate by any device other than the transmitting device and the intended receiving device. For example, the transmitting device may use a block cipher or stream cipher to generate a pseudorandom bit sequence and may select a subset of bits of the pseudorandom bit sequence to be mapped to a sequence of modulation symbols representing an LTF symbol of the secure LTF. More specifically, each of the modulation symbols is mapped to a respective one of a number of subcarriers spanning a bandwidth of the secure LTF. The transmitting device may further transmit a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF to the receiving device.

公开(公告)号：WO2021183627A1

公开(公告)日：2021-09-16

申请号：PCT/US2021/021678

申请日：2021-03-10

Applicant: QUALCOMM INCORPORATED

Inventor： YANG, Lin ,  TIAN, Bin

IPC: H04L5/00 ,  H04W84/12

Abstract: This disclosure provides systems, methods, and apparatuses for wireless communication. An example apparatus selects a first resource unit (RU) of a plurality of RUs for transmitting a physical (PHY) layer convergence protocol (PLCP) protocol data unit (PPDU) over a wireless medium. The first RU may include a set of contiguous tones occupying a first frequency bandwidth. The plurality of RUs may collectively span a second frequency bandwidth greater than the first frequency bandwidth. The apparatus maps the set of contiguous tones of the first RU to a set of non-contiguous tones distributed across the second frequency bandwidth using a tone mapping vector and a tone mapping offset associated with the first RU. The apparatus transmits the PPDU over the set of non-contiguous tones distributed across the second frequency bandwidth.

公开(公告)号：WO2021178511A1

公开(公告)日：2021-09-10

申请号：PCT/US2021/020635

申请日：2021-03-03

Applicant: QUALCOMM INCORPORATED

Inventor： YANG, Lin ,  TIAN, Bin ,  KIM, Youhan

IPC: H04L5/00

Abstract: This disclosure provides methods, devices and systems that support communicating using orthogonal frequency division multiple access (OFDMA) according to a tone plan that supports 20 MHz subchannel puncturing within a wireless channel. In some aspects, a non-legacy tone plan may define a set of tones for a resource unit (RU) such that the RU does not overlap a 20 MHz subchannel boundary of the wireless channel. The locations of the set of tones in the non-legacy tone plan may be shifted relative to corresponding tones associated with a corresponding RU according to a legacy tone plan. One or more of the disclosed tone plans may enable puncturing of subchannels while making use of some RUs that would otherwise partially overlap a punctured subchannel in the legacy tone plan.

公开(公告)号：WO2021173588A1

公开(公告)日：2021-09-02

申请号：PCT/US2021/019290

申请日：2021-02-23

Applicant: QUALCOMM INCORPORATED

Inventor： HO, Sai Yiu Duncan ,  CHERIAN, George ,  PATIL, Abhishek Pramod ,  ASTERJADHI, Alfred ,  BANERJEA, Raja ,  TIAN, Bin ,  SUN, Yanjun

IPC: H04W74/08

Abstract: This disclosure provides methods, devices and systems for non-simultaneous transmit and receive (STR) station (STA) transmissions using multiple links. In one aspect, a medium synchronization delay timer associated with a second link of the non- STR STA can be initiated in response to completing transmission of the data on the first link to delay triggering of a clear channel assessment (CCA) associated with the second link. Data can be transmitted on the second link in response to expiration of the medium synchronization delay timer. In another aspect, an energy detect (ED) threshold level on a second link may be decreased from a first ED threshold level to a second ED threshold level after transmitting the data on the first link.

公开(公告)号：WO2021158518A1

公开(公告)日：2021-08-12

申请号：PCT/US2021/016167

申请日：2021-02-02

Applicant: QUALCOMM INCORPORATED

Inventor： DOAN, Dung Ngoc ,  YANG, Lin ,  TIAN, Bin

IPC: H04L1/00 ,  H04L27/34

Abstract: This disclosure provides methods, devices and systems for encoding data for wireless communication to achieve probabilistic amplitude shaping. In some implementations, a transmitting device may achieve a fixed information block length (N), at least in part, by iteratively encoding the information bits until the number of amplitude-shaped bits combined with the number of unshaped bits is greater than or equal to a maximum payload length. For example, the maximum payload length may be equal to N. If the resulting number of amplitude-shaped bits plus the number of unshaped bits is less than N, the transmitting device may add one or more padding bits to the information block to achieve the fixed information block length.

公开(公告)号：WO2021092132A1

公开(公告)日：2021-05-14

申请号：PCT/US2020/059050

申请日：2020-11-05

Applicant: QUALCOMM INCORPORATED

Inventor： YANG, Lin ,  TIAN, Bin

IPC: H04L5/00

Abstract: This disclosure provides methods, devices and systems for configuring tones for a distributed resource unit (RU) across a channel bandwidth to improve frequency diversity and available transmit power. A distributed RU may include a set of tones that may be allocated across a bandwidth that is greater than a bandwidth of the aggregate quantity of tones. The set of tones may include a set of data tones grouped into contiguous groups of one or more data tones and a set of non-contiguous pilot tones. The data tones may be mapped to useful tones over a center portion of a half-bandwidth of the channel. The pilot tones may be mapped near edge tones at edges of the channel bandwidth or near direct current tones at a center of the channel bandwidth. A system bandwidth may include one or more channel bandwidths associated with distributed RUs.

公开(公告)号：WO2021030233A1

公开(公告)日：2021-02-18

申请号：PCT/US2020/045549

申请日：2020-08-09

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Jialing Li ,  VERMANI, Sameer ,  YANG, Lin ,  TIAN, Bin ,  JONES, IV, Vincent Knowles ,  KIM, Youhan

IPC: H04L27/26 ,  H04L5/00

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for including signaling regarding enhanced features of new wireless communication protocols. The signaling may be included in various portions of a physical layer preamble of a wireless transmission. In some implementations, the physical layer preamble may be used to indicate puncturing of subbands or content channels that may carry further signaling in accordance with preamble signaling designs of this disclosure. The physical layer preamble signaling be parallelized for different subchannels of a wireless channel that consists of multiple subchannels. Some implementations of the physical layer preambles may be used to multiplex different types of wireless local area network communications into different subsets of the plurality of subchannels of the wireless channel.