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公开(公告)号：US12289260B2
公开(公告)日：2025-04-29
申请号：US18174226
申请日：2023-02-24
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian
Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for physical (PHY) layer control signaling. A first physical layer convergence protocol (PLCP) protocol data unit (PPDU) may precede a second PPDU. The first PPDU may be referred to as a PHY control PPDU and may include a physical layer control signaling field (CNT-SIG) that informs one or more stations (STAs) regarding a physical layer configuration they should use for the second PPDU. The PHY control PPDU may enable dynamic subchannel assignments for one or more identified STAs, legacy STAs, or sub-bandwidth operating devices. The techniques of this disclosure may enable sharing of a wide bandwidth wireless channel by different types of devices or different basic service sets (BSSs) assigned to different subchannels of the wireless channel.
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公开(公告)号：US11950286B2
公开(公告)日：2024-04-02
申请号：US17707772
申请日：2022-03-29
Applicant: QUALCOMM Incorporated
Inventor： Alireza Raissinia , Xiaoxin Zhang , Stephen Jay Shellhammer
IPC: H04W74/0816 , H04W72/044 , H04W72/121 , H04W74/06
CPC classification number: H04W74/0816 , H04W72/044 , H04W72/121 , H04W74/06
Abstract: Methods, systems, and devices for wireless communication are described. A first wireless communications device may transmit, to one or more second wireless communications devices, a first message that triggers transmission of a second message by each of the one or more second wireless communications devices, the first message allocating to each of the one or more second wireless communications devices a respective frequency-based resource unit for transmission of the second message, each of the respective frequency-based resource units spanning a portion of a channel bandwidth of a channel. The first wireless communications device may perform channel sensing measurements on the second message received from each of the one or more second wireless communications devices. The first wireless communications device may estimate the channel based on the channel sensing measurements performed on the respective second messages received on the respective frequency-based resource units.
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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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Patent Agency Ranking
公开(公告)号：US11696177B2
公开(公告)日：2023-07-04
申请号：US17233242
申请日：2021-04-16
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian
IPC: H04W28/06 , H04W28/02 , H04W72/0453 , H04W80/02
CPC classification number: H04W28/06 , H04W28/0268 , H04W72/0453 , H04W80/02
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：US11374699B2
公开(公告)日：2022-06-28
申请号：US16945605
申请日：2020-07-31
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Jialing Li Chen , Dung Ngoc Doan , Bin Tian , Alfred Asterjadhi
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 first WLAN device may transmit a first HARQ frame to a second WLAN device. The first HARQ frame may include initial transmissions of a first plurality of forward error correction (FEC) codewords. The HARQ protocol may support new techniques for feedback, such as a feedback capability in which a bitmap may be used to indicate decoding failures of codewords. The first feedback message may include indicators to change a HARQ configuration parameter based on channel conditions. In some implementations, the second HARQ frame may combine retransmissions regarding the failed codewords with initial transmissions of a second plurality of codewords.
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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：US20210297209A1
公开(公告)日：2021-09-23
申请号：US17209132
申请日：2021-03-22
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay Shellhammer , Bin Tian , Sameer Vermani , Jialing Li Chen
Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for generating or receiving a wireless packet that includes a first preamble based on a first generation of a wireless communication protocol and a second preamble based on a second generation of the wireless communication protocol. The wireless packet may include the first preamble in a first subchannel of a wireless channel and the second preamble in a second subchannel of the wireless channel. Thus, the wireless packet may concurrently include communication to or from different types of wireless stations that support the different generations of a wireless communication protocol.
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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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