公开(公告)号：US20230035113A1

公开(公告)日：2023-02-02

申请号：US17390850

申请日：2021-07-30

Applicant: QUALCOMM Incorporated

Inventor： Stephen Jay Shellhammer ,  Lin Yang ,  Yanjun Sun ,  Bin Tian

IPC: H04W72/04

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 signaling in a trigger frame to support distributed transmissions via distributed resource units (dRUs). In some implementations, an access point (AP) may transmit a trigger frame soliciting a trigger-based (TB) physical layer convergence protocol (PLCP) protocol data unit (PPDU) from a wireless station (STA), where the trigger frame carries RU allocation information identifying a distributed resource unit (dRU) allocated for the STA and carries tone mapping information indicating a selected spreading bandwidth design for the wireless channel or subchannel. The AP can support channel puncturing by selecting a particular spreading bandwidth design that controls how dRUs are mapped to non-contiguous tones spanning respective spreading bandwidths.

公开(公告)号：US11546938B2

公开(公告)日：2023-01-03

申请号：US16988624

申请日：2020-08-08

Applicant: QUALCOMM Incorporated

Inventor： Jialing Li Chen ,  Sameer Vermani ,  Lin Yang ,  Bin Tian ,  Vincent Knowles Jones, IV ,  Youhan Kim

IPC: H04W74/00 ,  H04L5/00 ,  H04W72/04 ,  H04L69/18 ,  H04L69/22 ,  H04W84/12

Abstract: This disclosure provides methods, devices and systems for wireless communication, and particularly, methods, devices and systems for including signaling regarding enhanced features of new wireless communication protocols. The signaling may be included in various portions of a physical layer preamble of a wireless transmission. In some implementations, the physical layer preamble may be used to indicate puncturing of subbands or content channels that may carry further signaling in accordance with preamble signaling designs of this disclosure. The physical layer preamble signaling be parallelized for different subchannels of a wireless channel that consists of multiple subchannels. Some implementations of the physical layer preambles may be used to multiplex different types of wireless local area network communications into different subsets of the plurality of subchannels of the wireless channel.

公开(公告)号：US11272490B2

公开(公告)日：2022-03-08

申请号：US16402492

申请日：2019-05-03

Applicant: QUALCOMM Incorporated

Inventor： Lochan Verma ,  Bin Tian ,  Sameer Vermani ,  Lin Yang

IPC: H04W72/04 ,  H04B7/0452 ,  H04L1/00

Abstract: Techniques for control signaling in extreme high throughput (EHT) environments are described. A message transmitted by an access point (AP) may allocate resources to a plurality of stations (STAs). The AP may be configured to allocate up to 320 MHz of total bandwidth or up to sixteen spatial streams to one or more STAs. In some multiple-user multiple-input multiple-output (MU-MIMO) cases, the spatial configuration field may include a starting spatial stream field and a spatial stream number field. In some non-MU-MIMO cases, the spatial configuration field may be expanded by one bit or more. In some cases, content channels of a resource unit (RU) allocation table may span a frequency segment of 40 MHz.

公开(公告)号：US11245501B2

公开(公告)日：2022-02-08

申请号：US16559571

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

IPC: H04L5/00 ,  H04W16/14 ,  H04W72/04 ,  H04W74/08 ,  H04W88/08 ,  H04W84/12

Abstract: Methods, systems, and devices for wireless communications are described for coordination between multiple access points (APs) for communications within a transmission opportunity (TxOP). A first AP may gain channel access for a TxOP, and may coordinate with at least a second AP to allow both the first AP and the second AP to transmit and receive wireless communications during the TxOP. The first AP, upon gaining channel access following a successful contention-based channel access procedure, may initiate a scheduling phase with the second AP to schedule of resources within the TxOP for the first and second APs. The first AP may initiate a multi-AP coordinated transmission phase following the scheduling phase, during which both the first AP and second AP may communicate with one or more associated STAs.

公开(公告)号：US20220038241A1

公开(公告)日：2022-02-03

申请号：US17388344

申请日：2021-07-29

Applicant: QUALCOMM Incorporated

Inventor： Sameer VERMANI ,  Alfred Asterjadhi ,  Yanjun Sun ,  Bin Tian ,  Lin Yang ,  Jialing Li Chen ,  George Cherian ,  Youhan Kim

IPC: H04L5/00

Abstract: This disclosure provides methods, devices and systems for generating enhanced sounding packets. Some implementations more specifically relate to sounding packet designs that support enhancements to wireless communication protocols associated with the Institute of Electrical and Electronics Engineers (IEEE) 802.11be amendment, and future generations, of the IEEE 802.11 standard. In some implementations, an enhanced null data packet announcement (NDPA) frame may be configurable to support multiple versions of the IEEE 802.11 standard. For example, the enhanced NDPA frame may be configured in accordance with a legacy or a non-legacy NDPA frame format. In some other implementations, the enhanced NDPA frame may include a subfield carrying information identifying a particular basic service set (BSS) which may be associated with one or more STA information fields. Still further, in some implementations, an Extremely High Throughput (EHT) PPDU may include signaling to indicate whether the EHT PPDU is formatted as a sounding NDP.

公开(公告)号：US11206554B2

公开(公告)日：2021-12-21

申请号：US16515978

申请日：2019-07-18

Applicant: QUALCOMM Incorporated

Inventor： Sameer Vermani ,  Bin Tian ,  Lin Yang

IPC: H04W16/28 ,  H04W56/00 ,  H04W72/04 ,  H04L25/02 ,  H04L1/16

Abstract: This disclosure provides systems, methods and apparatuses for concurrently transmitting beamformed data from each of a plurality of access points (APs) to a wireless station (STA). In some implementations, the plurality of APs may operate as a distributed antenna array, and carrier signals of the plurality of APs may be synchronized with each other. A beamforming steering matrix may be determined for each of the plurality of APs, and beamformed data may be concurrently transmitted from each of the plurality of APs to the STA based on corresponding ones of the plurality of beamforming steering matrices.

公开(公告)号：US11171814B2

公开(公告)日：2021-11-09

申请号：US16786890

申请日：2020-02-10

Applicant: QUALCOMM Incorporated

Inventor： Bin Tian ,  Lin Yang ,  Sameer Vermani

IPC: H04L25/02 ,  H04B7/06 ,  H04L27/26 ,  H04B7/0452 ,  H04B7/0417

Abstract: This disclosure provides methods, devices and systems for providing channel feedback for multiple spatial streams. In some implementations, the techniques involve generating distinct channel estimates for different respective sets of orthogonal spatial streams. In some implementations, the orthogonality of the different sets of orthogonal spatial streams enables the beamformee to distinguish the spatial streams to provide the separate channel estimates. The beamformee may then determine separate correlations for the different respective sets of spatial streams. In some implementations, the beamformee combines the correlations to determine an average correlation for each of a number of sets of frequency tones. The beamformee may then perform an eigenvalue decomposition on a tone-by-tone basis based on the respective average correlation and the channel estimate obtained for the tone. Because the eigenvalue decomposition may be performed on each of the two sets of spatial streams separately, the complexity involved with performing each eigenvalue decomposition is greatly reduced.

公开(公告)号：US11165544B2

公开(公告)日：2021-11-02

申请号：US16592689

申请日：2019-10-03

Applicant: QUALCOMM Incorporated

Inventor： Lochan Verma ,  Bin Tian ,  Sameer Vermani ,  Youhan Kim ,  Lin Yang

IPC: H04L5/00 ,  H04B7/0452 ,  H04W84/12

Abstract: Methods, systems, and devices for wireless communications are described for control signaling in next generation wireless local area network (WLAN) environments. A message transmitted by an access point may allocate resources to a plurality of stations. The access point may be configured to allocate up to 320 MHz of total bandwidth along with coarse punctures. The access point may also allocate up to eight space-time streams to each station in a multi-user multiple-input multiple output (MU-MIMO) transmission, and support simultaneous transmission to up to sixteen stations. To support 320 MHz bandwidth and up to sixteen stations, one or more signaling fields used in other environments may be repurposed to effectively signal the additional resources available in a next generation WLAN.

公开(公告)号：US20210281454A1

公开(公告)日：2021-09-09

申请号：US17190216

申请日：2021-03-02

Applicant: QUALCOMM Incorporated

Inventor： Lin Yang ,  Bin Tian ,  Youhan Kim

IPC: H04L27/26 ,  H04L1/00 ,  H04L5/00

Abstract: This disclosure provides methods, devices and systems that support communicating using orthogonal frequency division multiple access (OFDMA) according to a tone plan that supports 20 MHz subchannel puncturing within a wireless channel. In some aspects, a non-legacy tone plan may define a set of tones for a resource unit (RU) such that the RU does not overlap a 20 MHz subchannel boundary of the wireless channel. The locations of the set of tones in the non-legacy tone plan may be shifted relative to corresponding tones associated with a corresponding RU according to a legacy tone plan. One or more of the disclosed tone plans may enable puncturing of subchannels while making use of some RUs that would otherwise partially overlap a punctured subchannel in the legacy tone plan.

公开(公告)号：US11109278B2

公开(公告)日：2021-08-31

申请号：US16162804

申请日：2018-10-17

Applicant: QUALCOMM Incorporated

Inventor： Lochan Verma ,  Bin Tian ,  Sameer Vermani ,  Lin Yang ,  Jialing Li Chen ,  George Cherian

IPC: H04W28/26 ,  H04W72/04 ,  H04W74/08 ,  H04W84/12 ,  H04L5/00 ,  H04L27/26 ,  H04W88/10

Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for multiplexing clients of different generations in trigger-based transmissions, including trigger-based transmissions in extremely-high throughput (EHT) Wi-Fi systems. An access point (AP) may generate a trigger frame compatible with two types of stations (STAs), such as EHT STAs and legacy (or high efficiency (HE)) STAs. The AP may transmit the trigger frame to a group of STAs, where legacy STAs may process the trigger frame a legacy trigger frame. EHT STAs may process the trigger frame to determine resource unit (RU) allocations for uplink transmissions in a bandwidth greater than a legacy bandwidth. An EHT STA may determine the resources in the larger bandwidth based on an EHT RU allocation table, a legacy RU allocation table and an additional bit in the trigger frame, or an ordering of RU allocations in the trigger frame.