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公开(公告)号：US20210367886A1
公开(公告)日：2021-11-25
申请号：US17323563
申请日：2021-05-18
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Sameer Vermani , Bin Tian
IPC: H04L12/741
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.
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公开(公告)号：US11166244B2
公开(公告)日：2021-11-02
申请号：US16775125
申请日：2020-01-28
Applicant: QUALCOMM Incorporated
Inventor： Yan Zhou , Bin Tian , Gwendolyn Denise Barriac , Alfred Asterjadhi , Simone Merlin , George Cherian
Abstract: A method, an apparatus, and a computer-readable medium for wireless communication are provided. In one aspect, the example method may include generating a data frame including a Medium Access Control (MAC) header or a physical layer (PHY) header. The MAC header or the PHY header of the data frame may include transmit power related information. The transmit power related information may include at least one of: a maximum transmit power, power backoff per modulation and coding scheme information, or an actual transmit power. The method may include transmitting the data frame to a second device.
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公开(公告)号：US11160020B2
公开(公告)日：2021-10-26
申请号：US16397140
申请日：2019-04-29
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Didier Johannes Richard Van Nee , Bin Tian
Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may identify a sequence of on symbols and off symbols for transmission to a wake-up radio (WUR) of a wireless device. The AP may assign a modulation symbol from a set of possible modulation symbol waveforms to at least each on symbol in the sequence. The modulation symbol waveforms may be assigned to sequential on symbols in a random or pseudorandom order, e.g., by applying a random phase rotation to a stored modulation symbol waveform, by applying a random cyclic shift to a stored modulation symbol waveform, or by applying a random or pseudorandom phase-shift keying value to each subcarrier in a multicarrier system to generate a modulation symbol waveform. The AP may transmit the sequence to the WUR based at least in part on the assigned modulation symbol waveforms.
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公开(公告)号：US20210211229A1
公开(公告)日：2021-07-08
申请号：US17140626
申请日：2021-01-04
Applicant: QUALCOMM Incorporated
Inventor： Dung Ngoc DOAN , Lin Yang , Didier Johannes Richard Van Nee , Bin Tian , Thomas Joseph Richardson , Stephen Jay Shellhammer
Abstract: This disclosure provides methods, devices and systems for encoding data in wireless communications. Some implementations more specifically relate to performing a first encoding operation on data bits of a code block to shape the amplitudes of the resultant symbols such that the amplitudes have a non-uniform distribution. In some aspects, the probabilities associated with the respective amplitudes generally increase with decreasing amplitude. For example, the non-uniform distribution of the amplitudes of the symbols may be approximately Gaussian. In some aspects, the first encoding operation is or includes a prefix encoding operation having an effective coding rate greater than 0.94 but less than 1. The first encoding operation is followed by a second encoding operation that also adds redundancy but does not alter the data bits themselves. In some aspects, the second encoding operation is or includes a low-density parity-check (LDPC) encoding operation associated with a coding rate greater than 5/6.
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公开(公告)号：US11057880B2
公开(公告)日：2021-07-06
申请号：US16421258
申请日：2019-05-23
Applicant: QUALCOMM Incorporated
Inventor： Lochan Verma , Bin Tian , Youhan Kim
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for per-station punctured transmissions. A wireless local area network (WLAN) device may determine available resource units (RUs) within a wireless channel that has a punctured frequency range. The WLAN device may allocate a plurality of RUs, from among the available RUs, for to include data for a same station. For example, a physical layer protocol data unit (PPDU) may include more than one RU for a first station. The RUs that are allocated to the first station may exclude the punctured frequency range. In some implementations, the plurality of RUs may be separated by at least the punctured frequency range. A signaling header in the PPDU may indicate which RUs are allocated to the first station. By allocating a plurality of RUs in a PPDU, a WLAN may support per-station puncturing within the PPDU.
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Patent Agency Ranking
公开(公告)号：US20210203531A1
公开(公告)日：2021-07-01
申请号：US17200625
申请日：2021-03-12
Applicant: QUALCOMM Incorporated
Inventor： Yan Zhou , Bin Tian , Alfred Asterjadhi , George Cherian
Abstract: Techniques are described herein that illustrate a feedback system to configure various format parameters of physical layer convergence procedure protocol data units (PPDUs) transmitted across a communication link. A receiving device may determine a Doppler shift or a delay spread of a signal received from a transmitting device. The receiving device may determine one or more format parameters for a future PPDU based on the Doppler shift or the delay spread. The receiving device may transmit an indication that includes the format parameters for the future PPDU to the transmitting device. The transmitting device may modify one or more format parameters of a PPDU based on the information in the indication. In some cases, the receiving device may indicate characteristics of mid-ambles, a type of PPDU, a guard interval, high efficiency long training field size for a future PPDU.
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公开(公告)号：US20210194629A1
公开(公告)日：2021-06-24
申请号：US17121642
申请日：2020-12-14
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Sameer Vermani , Lin Yang , Jialing Li Chen , Dung Ngoc Doan , Bin Tian
IPC: H04L1/00 , H04W24/10 , H04B7/0452 , H04B7/06
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for a link adaptation protocol in a wireless local area network (WLAN). In one aspect, the link adaptation protocol may be used to select a transmission rate option (such as a modulation and coding scheme (MCS)) for communications from a first WLAN device to a second WLAN device based on wireless channel conditions. This disclosure includes several example message sequences for the link adaptation protocol which can accommodate a variety of uplink or downlink data transmission designs, including single user (SU) and multi-user (MU) transmissions. The example message sequences may be used with orthogonal frequency division multiple access (OFDMA), multiple-input-multiple-output (MIMO), and beamformed transmissions.
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公开(公告)号：US11038529B2
公开(公告)日：2021-06-15
申请号：US16659531
申请日：2019-10-21
Applicant: QUALCOMM Incorporated
Inventor： Lochan Verma , Bin Tian , Sameer Vermani , Lin Yang , Jialing Li Chen
Abstract: In some aspects, methods and apparatus for wireless communications are configured to generate a packet for wireless communication where the packet includes a mark symbol in a preamble of the packet where the mark symbol includes a signature or stamp field in the mark to provide protocol information that indicates the protocol of the packet, such as an 802.11 EHT packet. In some other aspects, a cyclic redundancy check field in the mark symbol may be manipulated in various ways to indicate the protocol of the packet in lieu of providing the signature or stamp field.
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公开(公告)号：US11026172B2
公开(公告)日：2021-06-01
申请号：US16239479
申请日：2019-01-03
Applicant: QUALCOMM Incorporated
Inventor： Alfred Asterjadhi , George Cherian , Bin Tian , Stephen Jay Shellhammer
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for establishing communications with one or more devices. In one aspect, a first device generates a wake-up radio (WUR) frame, the WUR frame including a media access control (MAC) header and a frame check sequence (FCS) having a cyclic redundancy check (CRC) or a message integrity check (MIC). The first device may determine the FCS based, at least in part, on the MAC header and basic service set identifier (BSSID) information associated with the first device. The first device may output the WUR frame for transmission to one or more devices. A second device may receive the WUR frame from the first device and determine whether the WUR frame is directed to the second device based, at least in part, on comparing the FCS of the WUR frame with a calculated FCS.
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公开(公告)号：US10999014B2
公开(公告)日：2021-05-04
申请号：US16536280
申请日：2019-08-08
Applicant: QUALCOMM Incorporated
Inventor： Bin Tian , Hemanth Sampath , Sameer Vermani , Lin Yang , Dung Ngoc Doan , Simone Merlin , Alfred Asterjadhi , Jialing Li Chen , Stephen Jay Shellhammer
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A station (STA) may send a HARQ transmission to another STA. The HARQ protocol may support the use of different types of feedback from the receiving STA to control the HARQ retransmission process. This disclosure provides example message formats to support HARQ transmission and HARQ feedback in a WLAN.
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