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公开(公告)号：US20240214996A1
公开(公告)日：2024-06-27
申请号：US18428834
申请日：2024-01-31
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay SHELLHAMMER , Sameer VERMANI , Jialing Li CHEN , Bin TIAN , Alfred ASTERJADHI , Yanjun SUN
IPC: H04W72/044 , H04L69/22 , H04W72/51 , H04W84/12
CPC classification number: H04W72/044 , H04L69/22 , H04W72/51 , H04W84/12
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.
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公开(公告)号：US20240171355A1
公开(公告)日：2024-05-23
申请号：US18540324
申请日：2023-12-14
Applicant: QUALCOMM Incorporated
Inventor： Bin TIAN , Stephen Jay SHELLHAMMER , Yanjun SUN , Alfred ASTERJADHI
CPC classification number: H04L5/0053 , H04W28/06 , H04W72/20
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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公开(公告)号：US20240080690A1
公开(公告)日：2024-03-07
申请号：US18465804
申请日：2023-09-12
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Stephen Jay SHELLHAMMER , Dung Ngoc DOAN , Sameer VERMANI , Jialing Li CHEN
CPC classification number: H04W24/08 , H04L27/2627 , H04W84/12
Abstract: This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.
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公开(公告)号：US20240063876A1
公开(公告)日：2024-02-22
申请号：US17820006
申请日：2022-08-16
Applicant: QUALCOMM Incorporated
Inventor： Kanke WU , Bin TIAN , Tevfik YUCEK , Lin YANG
CPC classification number: H04B7/0691 , H04L5/0098
Abstract: This disclosure provides methods, devices and systems for improving wireless communications in power spectral density (PSD)-limited frequency bands. A wireless communication device, having a number (NTX) of transmit antennas, parses a physical layer (PHY) protocol data unit (PPDU) into a number (NSS) of spatial streams and modulates the NSS spatial streams on a number (M) of subcarriers. In some implementations, the wireless communication device may transmit the PPDU using a number (N) of the transmit antennas, where NSS≤N
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公开(公告)号：US20240022286A1
公开(公告)日：2024-01-18
申请号：US18448010
申请日：2023-08-10
Applicant: QUALCOMM Incorporated
Inventor： Sameer VERMANI , Bin TIAN
IPC: H04B7/024 , H04L5/00 , H04B7/0452 , H04W72/044 , H04B7/0417 , H04W84/12 , H04W72/29
CPC classification number: H04B7/024 , H04L5/0035 , H04B7/0452 , H04L5/0044 , H04L5/0091 , H04W72/046 , H04B7/0417 , H04W84/12 , H04W72/29 , H04B7/0617
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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Patent Agency Ranking
公开(公告)号：US20240007241A1
公开(公告)日：2024-01-04
申请号：US18323333
申请日：2023-05-24
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Qifan CHEN , Youhan KIM
CPC classification number: H04L5/0041 , H04L5/0048 , H04L5/0069 , H04W52/286
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 LTF designs that support distributed transmissions. In some aspects, a transmitting device may obtain a sequence of values representing an LTF of a PPDU and may map the sequence of values to a number (N) of noncontiguous subcarrier indices of a plurality of subcarrier indices spanning a wireless channel according to a distributed tone plan. In some implementations, the transmitting device may modulate the sequence of values on N tones, representing a logical RU, and map the N tones to the N noncontiguous subcarrier indices, respectively. In some other implementations, the sequence of values may be obtained based on relative locations of the N noncontiguous subcarrier indices in the wireless channel.
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公开(公告)号：US20230388986A1
公开(公告)日：2023-11-30
申请号：US17828085
申请日：2022-05-31
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Jialing Li CHEN , Bin TIAN , Youhan KIM
CPC classification number: H04W72/0453 , H04L5/0044 , H04L5/0078 , H04L27/2602
Abstract: This disclosure provides methods, devices and systems for increasing carrier frequencies for wireless communications in wireless local area networks (WLANs). Some implementations more specifically relate to packet designs that support wireless communications on carrier frequencies above 7 GHz. In some aspects, a wireless communication device may map a physical layer convergence protocol (PLCP) protocol data unit (PPDU) to orthogonal subcarriers according to existing tone plans associated with carrier frequencies below 7 GHz and may up-clock the PPDU for transmission on carrier frequencies above 7 GHz (such as by increasing the frequency of a clock signal used to convert the PPDU between the frequency domain and the time domain). In some implementations, the PPDU may conform to an existing PPDU format designed for sub-7 GHz wireless communications. In some other implementations, the PPDU may conform to a “green field” PPDU format optimized for wireless communications on carrier frequencies above 7 GHz.
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公开(公告)号：US20230283422A1
公开(公告)日：2023-09-07
申请号：US18174226
申请日：2023-02-24
Applicant: QUALCOMM Incorporated
Inventor： Stephen Jay SHELLHAMMER , Bin TIAN
CPC classification number: H04L5/0044 , H04L27/2607
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：US20230069075A1
公开(公告)日：2023-03-02
申请号：US17402475
申请日：2021-08-13
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM , Qifan CHEN
Abstract: This disclosure provides methods, devices and systems for distributed transmission of short training fields in a power spectral density limited frequency band. In one aspect, a device receives a distributed resource unit (dRU) assignment for transmission of a dRU portion of a physical layer protocol data unit (PPDU); determines a spatial stream global cyclic shift delay (CSD) index for an short training field (STF) of the dRU portion of the PPDU; and transmits, based on the spatial stream global CSD index, the EHT of the dRU portion of the PPDU across a dRU spreading bandwidth associated with the dRU assignment using a tone plan and sequence corresponding to a regular resource unit (rRU) transmission mode.
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公开(公告)号：US20220030625A1
公开(公告)日：2022-01-27
申请号：US17382242
申请日：2021-07-21
Applicant: QUALCOMM Incorporated
Inventor： Lin YANG , Bin TIAN , Youhan KIM
Abstract: This disclosure provides methods, devices and systems for clear channel assessment (CCA). In one aspect a device performs a first clear channel assessment (CCA) check on a primary subchannel of a channel having a total bandwidth greater than or equal to 40 megahertz (MHz), a plurality of subchannels of the channel collectively spanning the total bandwidth of the channel, the plurality of subchannels including the primary subchannel and one or more secondary subchannels, the primary subchannel and the one or more secondary subchannels each having a bandwidth of 20 MHz, performs, on each of the one or more secondary subchannels, a respective second CCA check, and transmits a communication on the channel based on a status of each of the primary subchannel and the one or more secondary subchannels that is based on the performance of the respective second CCA check or the first CCA check.
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