公开(公告)号：US20220385437A1

公开(公告)日：2022-12-01

申请号：US17330393

申请日：2021-05-25

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Jialing Li Chen ,  Sameer Vermani ,  Kanke Wu ,  Youhan Kim

IPC: H04L5/00 ,  H04L1/00

Abstract: This disclosure provides methods, devices and systems for wireless communications over a 320 MHz bandwidth. Some implementations more specifically relate to signaling techniques for indicating the bandwidth of a physical layer convergence protocol (PLCP) protocol data unit (PPDU) transmitted in a secondary 160 MHz channel of the 320 MHz bandwidth. In some implementations, an access point (AP) may transmit an aggregated PPDU (A-PPDU) that includes a first sub-PPDU transmitted within a primary 160 MHz channel and a second sub-PPDU transmitted within a secondary 160 MHz channel. In such implementations, the first sub-PPDU may carry bandwidth information indicating the bandwidth of the first sub-PPDU within the primary 160 MHz channel and the second sub-PPDU may carry bandwidth information indicating the 320 MHz bandwidth.

公开(公告)号：US11496924B2

公开(公告)日：2022-11-08

申请号：US16917225

申请日：2020-06-30

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Alfred Asterjadhi ,  Stephen Jay Shellhammer ,  Dung Ngoc Doan ,  Bin Tian ,  George Cherian ,  Abhishek Pramod Patil

IPC: H04W28/04 ,  H04L1/00 ,  H04L1/18

Abstract: This disclosure provides methods, devices and systems of wireless communication in accordance with hybrid automatic repeat request (HARQ) techniques. Some implementations more specifically relate to aligning aggregate medium access control (MAC) protocol data unit (A-MPDU) subframes with codeword boundaries in a physical-layer service data unit (PSDU). The alignment may be performed by selectively adding padding bits to the PSDU based on the size of each A-MPDU subframe and the lengths of the codewords. In some aspects, an A-MPDU subframe may be aligned with a first codeword of the PSDU so that the first A-MPDU subframe is encoded exclusively within the first codeword. In some other aspects, an A-MPDU subframe may be aligned with two or more contiguous codewords of the PSDU so that the two or more contiguous codewords include the A-MPDU subframe and no portions of any other A-MPDU subframe.

公开(公告)号：US11362708B2

公开(公告)日：2022-06-14

申请号：US17013507

申请日：2020-09-04

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian ,  Stephen Jay Shellhammer ,  Youhan Kim

IPC: H04B7/0456 ,  H04W52/24 ,  H04W52/32 ,  H04B7/08 ,  H04B7/06

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for implementing a joint transmission feature in a wireless communication system. Using the joint transmission feature, multiple access points (APs) may use an aggregated collection of antennas of multiple APs to simultaneously transmit a joint beamformed transmission to one or more stations (STAs). The techniques in this disclosure may prevent or reduce variations in relative gain adjustments by the APs that could otherwise negatively impact the joint transmission. In some implementations, a network device may determine a normalized gain adjustment value based on power parameters associated with each of the multiple APs. In some other implementations, each AP may determine the normalized gain adjustment value based on power parameters shared between the APs.

公开(公告)号：US11057830B2

公开(公告)日：2021-07-06

申请号：US15808639

申请日：2017-11-09

Applicant: QUALCOMM Incorporated

Inventor： Santosh Paul Abraham ,  Stephen Jay Shellhammer ,  Linhai He ,  Bin Tian

IPC: H04W72/04 ,  H04W52/02 ,  H04L12/26 ,  H04W84/12 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. An access point (AP) may identify a jitter pattern for a wakeup message. A station may listen using a wakeup radio for a wakeup message during wakeup listening periods according to the identified jitter pattern. A station may receive a preamble having a first bandwidth and a wakeup message having a second bandwidth. An AP may transmit an identifier key to a station, and the station may determine a rotating identifier associated with the AP based on the received identifier key. The station may receive a wakeup message from the AP, compare a sender identifier with the rotating identifier, and power on a second radio. A station may also receive a wakeup message that includes an indication of which station are to be activated.

公开(公告)号：US20210176657A1

公开(公告)日：2021-06-10

申请号：US17105349

申请日：2020-11-25

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Sameer Vermani ,  Stephen Jay Shellhammer ,  Dung Ngoc Doan ,  Jialing Li Chen

IPC: H04W28/02 ,  H04B7/0413 ,  H04B17/309 ,  H04L5/00

Abstract: This disclosure provides systems, methods, and apparatus for link adaptation in a wireless local area network (WLAN). A link adaptation test packet from a first WLAN device to a second WLAN device may be formatted as a multiple-input-multiple-output (MIMO) transmission and may include one or more test portions for link quality estimation of the MIMO transmission. A link quality estimation portion of the test packet may permit measurement of link quality for various spatial streams of the MIMO transmission. The link adaptation test packet may enable a fast rate adaptation of a communication link based on the impact of interference to the various spatial streams. The second WLAN device may provide feedback information regarding the one or more 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.

公开(公告)号：US20210067214A1

公开(公告)日：2021-03-04

申请号：US17013507

申请日：2020-09-04

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian ,  Stephen Jay Shellhammer ,  Youhan Kim

IPC: H04B7/0456 ,  H04B7/08 ,  H04W52/32 ,  H04W52/24

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for implementing a joint transmission feature in a wireless communication system. Using the joint transmission feature, multiple access points (APs) may use an aggregated collection of antennas of multiple APs to simultaneously transmit a joint beamformed transmission to one or more stations (STAs). The techniques in this disclosure may prevent or reduce variations in relative gain adjustments by the APs that could otherwise negatively impact the joint transmission. In some implementations, a network device may determine a normalized gain adjustment value based on power parameters associated with each of the multiple APs. In some other implementations, each AP may determine the normalized gain adjustment value based on power parameters shared between the APs.

公开(公告)号：US20200344007A1

公开(公告)日：2020-10-29

申请号：US16855885

申请日：2020-04-22

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Stephen Jay Shellhammer ,  Alfred Asterjadhi ,  Dung Ngoc Doan ,  Bin Tian ,  Youhan Kim

IPC: H04L1/18 ,  H04W28/04 ,  H04L1/00 ,  H04L5/00

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.

公开(公告)号：US20200052832A1

公开(公告)日：2020-02-13

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

IPC: H04L1/18 ,  H04L1/00

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.

公开(公告)号：US20190253296A1

公开(公告)日：2019-08-15

申请号：US16274122

申请日：2019-02-12

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Bin Tian ,  Lin Yang ,  Sameer Vermani ,  Lochan Verma ,  Youhan Kim ,  Stephen Jay Shellhammer

IPC: H04L27/26 ,  H04L12/24 ,  H04W72/04

CPC classification number: H04L27/2626 ,  H04L27/2605 ,  H04L41/0896 ,  H04W72/0453 ,  H04W84/12

Abstract: Methods and apparatuses are disclosed for communicating over a wireless communication network. One such apparatus may include a memory and a processor configured to identify a transmission mode for a transmission of a signal; select a tone plan for transmission of the signal within a 320 MHz total channel bandwidth or a 240 MHz total channel bandwidth, where the tone plan includes a 256 point tone plan, 512 point tone plan, 1024 point tone plane, 2048 point tone plan, 4096 point tone plan, and where the tone plan is selected based on the transmission mode; generate the signal according to the tone plan; and transmit the signal over the 320 MHz total channel bandwidth or over the 240 MHz total channel bandwidth. The selected tone plan may include one or more duplicates of an IEEE 802.11ax 80 MHz (HE80) tone plan which may include one or more null space 26 tone resource units.

公开(公告)号：US20190208470A1

公开(公告)日：2019-07-04

申请号：US16239479

申请日：2019-01-03

Applicant: QUALCOMM Incorporated

Inventor： Alfred Asterjadhi ,  George Cherian ,  Bin Tian ,  Stephen Jay Shellhammer

IPC: H04W52/02 ,  H04L29/06 ,  H04W72/04

CPC classification number: H04W52/0229 ,  H04L69/22 ,  H04W72/0446 ,  H04W84/12

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.