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公开(公告)号：US20230121644A1
公开(公告)日：2023-04-20
申请号：US18069153
申请日：2022-12-20
Applicant: QUALCOMM Incorporated
Inventor： Alfred ASTERJADHI , George CHERIAN , Abhishek Pramod PATIL , Bin TIAN
Abstract: Certain aspects of the present disclosure provide an apparatus for wireless communications. The apparatus generally includes a processing system configured to generate a frame for triggering transmission of a plurality of data units from a plurality of wireless nodes, a first interface configured to output the frame for transmission to the plurality of wireless nodes, and a second interface configured to obtain the plurality of data units after outputting the frame for transmission, wherein the plurality of data units have different lengths.
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公开(公告)号：US20220338057A1
公开(公告)日：2022-10-20
申请号：US17233242
申请日：2021-04-16
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay SHELLHAMMER , Bin TIAN
Abstract: This disclosure provides methods, devices and systems for soliciting trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data units (PPDUs). Some implementations more specifically relate to trigger frame and PPDU designs that support RU downsizing. For example, an access point (AP) may transmit a trigger frame soliciting a TB PPDU from a wireless station (STA). In some aspects, the trigger frame may carry RU allocation information indicating the allocated RU or MRU (associated with a wireless medium) and downsizing information indicating whether downsizing of the RU or MRU is permitted. If interference is detected in a portion of the wireless medium, and downsizing is permitted, the STA may transmit the TB PPDU on a downsized RU or MRU. The downsized RU or MRU includes a subset of the tones in the RU or MRU allocated by the trigger frame.
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公开(公告)号：US20220224579A1
公开(公告)日：2022-07-14
申请号：US17145641
申请日：2021-01-11
Applicant: QUALCOMM Incorporated
Inventor： Alireza RAISSINIA , Bin TIAN , Stephen Jay SHELLHAMMER , Youhan KIM
Abstract: This disclosure provides methods, devices and systems for improving the security of secure long training field (LTF) transmissions. In some implementations, a transmitting device may perform windowing on a secure LTF, in the frequency domain, so that the resulting time-domain LTF signal is difficult, if not impossible, to predict by any device that observes a portion of the LTF signal. In some aspects, the transmitting device may negotiate the windowing of secure LTFs with a receiving device based on fine timing measurement (FTM) negotiation frames exchanged at the start of an FTM procedure. In some other aspects, the transmitting device may dynamically or adaptively perform windowing on secure LTFs. In such aspects, the transmitting device may indicate whether windowing is performed on a secure LTF based on information carried in a signal field of a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF.
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公开(公告)号：US20220159673A1
公开(公告)日：2022-05-19
申请号：US17581735
申请日：2022-01-21
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Stephen Jay SHELLHAMMER , Alfred ASTERJADHI , Dung Ngoc DOAN , Bin TIAN , Youhan KIM
Abstract: This disclosure provides systems, methods and apparatuses for data retransmissions in a wireless network. In some implementations, a wireless communication device may transmit a first data unit to a receiving device, may receive a first hybrid automatic repeat request (HARQ) feedback frame indicating that a portion of the first data unit was not successfully decoded by the receiving device, may retransmit the indicated portion of the first data unit to the receiving device in response to the first HARQ feedback frame, and may transmit a second data unit, different than the first data unit, to the receiving device concurrently with the retransmission of the indicated portion of the first data unit.
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公开(公告)号：US20220150025A1
公开(公告)日：2022-05-12
申请号：US17096934
申请日：2020-11-12
Applicant: QUALCOMM Incorporated
Inventor： Bin TIAN , Stephen Jay SHELLHAMMER , Yanjun SUN , Alfred ASTERJADHI
Abstract: This disclosure provides methods, devices and systems for soliciting trigger-based (TB) physical layer protocol convergence protocol (PLCP) protocol data units (PPDUs). Some implementations more specifically relate to trigger frame designs that support non-legacy TB PPDU formats. In some aspects, a trigger frame may carry information to be included in a physical layer (PHY) preamble of a TB PPDU solicited by the trigger frame. For example, the information may indicate values of one or more subfields of a universal signal field (U-SIG) associated with the non-legacy TB PPDU format. In some aspects, the information may be carried in a special user information field of the trigger frame. For example, the special user information field may be identified by a special association identifier (AID) value. The special AID value may be different than any AID values assigned to wireless communication devices in a basic service set (BSS) associated with the TB PPDU.
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Patent Agency Ranking
公开(公告)号：US20220029772A1
公开(公告)日：2022-01-27
申请号：US17382263
申请日：2021-07-21
Applicant: QUALCOMM Incorporated
Inventor： Kanke WU , Jialing Li CHEN , Bin TIAN
Abstract: Duplicated physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmission is described for a wireless device with reduced peak-to-average power ratios (PAPR). One example includes obtaining a first sub-PPDU from to PPDU that includes a data field with data content. A second sub-PPDU may also be obtained by duplicating the PPDU including the data content of the PPDU. At least one of a phase rotation, a phase offset, or a phase ramp is applied to at least a portion of a second set of sub-carrier of a wideband channel. The first sub-PPDU is transmitted on a first set of sub-carriers of the wideband channel and the second sub-PPDU is transmitted on the second set of sub-carriers of the wideband channel.
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公开(公告)号：US20210409249A1
公开(公告)日：2021-12-30
申请号：US17356330
申请日：2021-06-23
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li CHEN , Bin TIAN , Youhan KIM , Cheng-Ming CHEN
Abstract: A technique for wireless communication of a punctured null data packet with a long training field sequence is disclosed. The long training field (LTF) sequence is generated for the null data packet (NDP) for transmission over a channel having a bandwidth that is an integer multiple of 80 MHz. The LTF sequence is modulated onto a plurality of tones of the channel excluding tones within a punctured subchannel of a plurality of subchannels of the channel. The modulation may be based on a size and location of the punctured subchannel and a symbol duration associated with transmitting the LTF sequence. The NDP is transmitted including the LTF sequence to a second wireless communication device via the channel. A partial bandwidth feedback may be received in response to the LTF in the punctured NDP.
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公开(公告)号：US20210399933A1
公开(公告)日：2021-12-23
申请号：US17353673
申请日：2021-06-21
Applicant: QUALCOMM Incorporated
Inventor： Kanke WU , Jialing Li CHEN , Lin YANG , Bin TIAN
IPC: H04L27/26
Abstract: Various aspects relate generally to the generation and wireless transmission of a long training field (LTF) and a data field within a 320 MHz or 240 MHz bandwidth channel. The LTF includes an LTF sequence based on a concatenation of a plurality of LTF subsequences, each LTF subsequence being associated with a channel bandwidth less than the total bandwidth of the channel, each of the plurality of LTF subsequences being selectively phase-rotated to reduce a peak-to-average power ratio. Each of the plurality of LTF subsequences may be associated with an LTF designed for an 80 MHz bandwidth channel. The LTF and the data field may then be transmitted in a wireless packet to at least one second wireless communication device via the 320 MHz or 240 MHz bandwidth channel.
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公开(公告)号：US20210226671A1
公开(公告)日：2021-07-22
申请号：US17127890
申请日：2020-12-18
Applicant: QUALCOMM Incorporated
Inventor： Sameer VERMANI , Bin TIAN
IPC: H04B7/024 , H04L5/00 , H04B7/0452 , H04W72/04 , H04B7/0417 , H04W84/12
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for group formation and sounding for distributed multi-user multiple input multiple output (MU-MIMO). Some implementations include a method of wireless communication. The method includes transmitting, from a first access point of a plurality of access points, an announcement frame for performing a beamforming procedure for a distributed transmission. The distributed transmission includes a transmission from the plurality of access points. The announcement frame includes at least one identifier of a user terminal in a different basic service set than a basic service set of the first access point. The method further includes transmitting a packet for measuring a channel. The method further includes receiving feedback information from the user terminal based on the packet for measuring the channel. The method further includes transmitting the distributed transmission using the beamforming procedure.
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公开(公告)号：US20210211143A1
公开(公告)日：2021-07-08
申请号：US17130162
申请日：2020-12-22
Applicant: QUALCOMM Incorporated
Inventor： Thomas Joseph RICHARDSON , Dung Ngoc DOAN , Didier Johannes Richard VAN NEE , Lin YANG , Bin TIAN
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for encoding data for wireless transmissions. In one aspect, a wireless device may encode a number (M) of systematic bits for transmission to a receiving device. The systematic bits may be encoded using a low-density parity-check (LDPC) code to produce an LDPC codeword. The LDPC codeword may include a number (N) of codeword bits, including the M systematic bits and one or more parity bits. The wireless device may further puncture a number (K) of the codeword bits to produce a punctured codeword having a code rate M/(N−K)>5/6. The wireless device may transmit the N−K remaining codeword bits, over a wireless channel, to a receiving device.
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