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公开(公告)号：US20230318763A1
公开(公告)日：2023-10-05
申请号：US18327216
申请日：2023-06-01
Applicant: QUALCOMM Incorporated
Inventor： George Cherian , Alfred Asterjadhi , Abhishek Pramod Patil , Sameer Vermani , Bin Tian , Stephen Jay Shellhammer , Lochan Verma , Lin Yang , Jialing Li Chen
IPC: H04L5/00 , H04W16/14 , H04W72/044 , H04W74/08 , H04W72/27
CPC classification number: H04L5/0035 , H04L5/0007 , H04L5/0037 , H04W16/14 , H04W72/044 , H04W74/0808 , H04W72/27 , H04W88/08
Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may transmit, to a second AP and during a first portion of a transmission opportunity (TxOP), a request to participate in a multi-user (MU) transmission. The AP may receive, from the second AP and during the first portion of the TxOP, an indication of intent to participate in the MU transmission during the second portion of the TxOP, the indication of intent including a resource request of the second AP for participation in the MU transmission. The AP may transmit, during an initial period of the second portion of the TxOP, a trigger signal to the second AP indicating a set of one or more resources for the second AP during the MU transmission. The AP may participate, in conjunction with the second AP and during the second portion of the TxOP, in the MU transmission.
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公开(公告)号：US11757564B2
公开(公告)日：2023-09-12
申请号：US17103550
申请日：2020-11-24
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Dung Ngoc Doan , Sameer Vermani , Stephen Jay Shellhammer , Jialing Li Chen
CPC classification number: H04L1/0013 , H04L1/0003 , H04W24/08 , H04W84/12
Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for link adaptation in a wireless local area network (WLAN). A link adaptation test packet from a first WLAN device to a second WLAN may include a plurality of link adaptation test portions that are generated using a corresponding plurality of transmission rate options. For example, the plurality of link adaptation test portions may be modulated using different modulation and coding scheme (MCS) options. Thus, a single test packet may be used to evaluate different transmission rate options. The second WLAN device may provide feedback information regarding the link adaptation test portions. The feedback information may be used to determine a transmission rate for a subsequent transmission from the first WLAN device to the second WLAN device based on wireless channel conditions.
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公开(公告)号：US11711183B2
公开(公告)日：2023-07-25
申请号：US16559605
申请日：2019-09-03
Applicant: QUALCOMM Incorporated
Inventor： George Cherian , Alfred Asterjadhi , Abhishek Pramod Patil , Sameer Vermani , Bin Tian , Stephen Jay Shellhammer , Lochan Verma , Lin Yang , Jialing Li Chen
CPC classification number: H04L5/0035 , H04L5/0007 , H04L5/0037 , H04W16/14 , H04W72/044 , H04W72/27 , H04W74/0808 , H04W84/12 , H04W88/08
Abstract: Methods, systems, and devices for wireless communications are described. An access point (AP) may transmit, to a second AP and during a first portion of a transmission opportunity (TxOP), a request to participate in a multi-user (MU) transmission. The AP may receive, from the second AP and during the first portion of the TxOP, an indication of intent to participate in the MU transmission during the second portion of the TxOP, the indication of intent including a resource request of the second AP for participation in the MU transmission. The AP may transmit, during an initial period of the second portion of the TxOP, a trigger signal to the second AP indicating a set of one or more resources for the second AP during the MU transmission. The AP may participate, in conjunction with the second AP and during the second portion of the TxOP, in the MU transmission.
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公开(公告)号：US11646854B2
公开(公告)日：2023-05-09
申请号：US17245471
申请日：2021-04-30
Applicant: QUALCOMM Incorporated
IPC: H04W56/00 , H04L5/00 , H04W72/0446 , H04W80/02
CPC classification number: H04L5/0094 , H04L5/0039 , H04W72/0446 , H04W80/02
Abstract: This disclosure provides methods, devices and systems for increasing the transmit power of wireless communication devices operating on power spectral density (PSD)-limited wireless channels. Some implementations more specifically relate to trigger frame and physical layer convergence protocol (PLCP) protocol data unit (PPDU) designs that support distributed transmission. In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) PPDU from a wireless station (STA), where the trigger frame carries RU allocation information indicating a number (N) of tones allocated for the STA and carries tone distribution information indicating whether the N tones are allocated for a contiguous transmission or a distributed transmission. In some other implementations, an AP or a STA may transmit a PPDU carrying distributed signaling information indicating whether the PPDU is transmitted as a contiguous transmission or a distributed transmission.
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公开(公告)号：US11533694B2
公开(公告)日：2022-12-20
申请号：US16659253
申请日：2019-10-21
Applicant: QUALCOMM Incorporated
Inventor： Sameer Vermani , Bin Tian , Lin Yang , Jialing Li Chen
Abstract: This disclosure provides systems, methods, apparatus, and computer programs encoded on computer storage media, for relative timing drift correction for distributed multi-user transmissions. In one aspect, a first access point (AP) may receive a first signal from a second AP. The first signal may be associated with a channel sounding procedure to be performed substantially simultaneously by the second AP and the first AP. The first AP may then receive a second signal from the second AP, and prior to a substantially simultaneous transmission by the second AP and the first AP. The second signal may include timing information relative to the first signal. The first AP may determine a start time of the substantially simultaneous transmission at the first AP based on the timing information, and may initiate the substantially simultaneous transmission according to the determined start time.
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Patent Agency Ranking
公开(公告)号：US11438880B2
公开(公告)日：2022-09-06
申请号：US17099343
申请日：2020-11-16
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Bin Tian , Dung Ngoc Doan
Abstract: This disclosure provides methods, devices and systems for amplitude shaping encoding, and specifically, for indicating boundaries in bitstreams encoded using amplitude shaping encoding. In some aspects, a transmitting device may insert, into an bitstream to indicate a boundary, a sequence of amplitude bits not associated with any patterns of bit values in a lookup table used for the encoding. In some other aspects, a transmitting device may monitor a length of the amplitude bits in a bitstream during the encoding and stop the encoding on information bits at an end of a current data unit responsive to the length reaching a threshold. In some other aspects, a transmitting device may monitor the length of the information bits and, for each data unit, determine whether a boundary is or would be reached. Responsive to determining that a boundary is or would be reached, the transmitting device may not include, before the boundary, any amplitude bits generated based on the information bits in the data unit, and instead add padding bits after a last amplitude bit before the boundary.
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公开(公告)号：US11303303B2
公开(公告)日：2022-04-12
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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公开(公告)号：US11228396B2
公开(公告)日：2022-01-18
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：US11190385B2
公开(公告)日：2021-11-30
申请号：US17102422
申请日：2020-11-23
Applicant: QUALCOMM Incorporated
Inventor： Lin Yang , Jialing Li Chen , Bin Tian
Abstract: This disclosure provides methods, devices, and systems for a wireless communication device to perform signal phase rotation. In some implementations, the wireless communication device may determine a number of phase rotation parameters to be applied to a number of tones of a transmission signal. In some aspects, each of the phase rotation parameters indicates a phase rotation to be applied to each of the tones according to a carrier index range for each of the tones and a bandwidth mode for the transmission signal. In some implementations, the wireless communication device may apply the phase rotation parameters to respective ones of the tones according to the specified phase rotations and the carrier index ranges, and transmit the transmission signal from the wireless communication device according to the applied phase rotation parameters.
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公开(公告)号：US11121806B2
公开(公告)日：2021-09-14
申请号：US16562907
申请日：2019-09-06
Applicant: QUALCOMM Incorporated
Inventor： Jialing Li Chen , Dung Ngoc Doan , Bin Tian , Lin Yang , Sameer Vermani , Lochan Verma , Stephen Jay Shellhammer
IPC: H04L5/00 , H04L1/00 , H04B7/0417 , H04L1/18 , H04L27/26
Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for low density parity check (LDPC)-based incremental redundancy (IR) hybrid automatic repeat request (HARQ) transmission processing. In one aspect, an apparatus for wireless communications is configured to generate a first packet using a LDPC encoding process. The apparatus is further configured to generate coded bits using a second LDPC encoding process if the first packet is not successfully decoded by a wireless device, generate a second packet including at least some of the coded bits generated using the second LDPC encoding process, and output the second packet for transmission.
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