公开(公告)号：WO2022266531A1

公开(公告)日：2022-12-22

申请号：PCT/US2022/034161

申请日：2022-06-20

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： LIN, Zinan ,  SAAD, Mahmoud ,  LOU, Hanqing ,  YANG, Rui ,  WANG, Xiaofei

IPC: H04B7/0417 ,  H04B7/02 ,  H04W16/28 ,  H04W84/12

Abstract: Methods and apparatuses for Multi-AP channel sounding for Wireless Area Networks (WLAN) are disclosed. A method performed by a beamformee may compromise: receiving, from a beamformer, a null data packed (NDP) announcement frame (NDPA); receiving, from the beamformer, an NDP frame; receiving, from the beamformer, an enhanced beamforming request poll (BFRP) trigger frame including an indication of a feedback format; and transmitting, to the beamformer based on the NDP and NDPA, using a format indicated by the feedback format of the BFRP trigger frame, a feedback frame including a feedback report. The trigger frame may be an enhanced beamforming report poll (BFRP) trigger frame. The feedback report may be a beamforming report or a vector index (VI) feedback report. The beamformer may be an access point (AP) and the beamformee may be a station (STA).

公开(公告)号：WO2022261104A1

公开(公告)日：2022-12-15

申请号：PCT/US2022/032513

申请日：2022-06-07

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： LIN, Zinan ,  LOU, Hanqing ,  KAMEL, Mahmoud ,  WANG, Xiaofei ,  YANG, Rui

IPC: H04L5/00 ,  H04B17/309 ,  H04L25/02

Abstract: Methods and apparatuses for channel sounding reports may be used in wireless local area network (WLAN) systems. A station (STA) may receive, from an access point (AP), a beacon frame. The STA may receive, from the AP, a null data packet (NDP) announcement (NDPA) frame including an indication of subchannels for measuring channel characteristics. The STA may receive, from the AP, an NDP frame. The STA may transmit, to the AP, a feedback report frame including channel state information (CSI) feedback, wherein the CSI feedback is based on measurements that the STA performed on the received NDP frame using the indicated subchannels for measuring channel characteristics. The beacon frame may include indications of punctured subchannel(s) and subchannel(s) that is not punctured, which may be indicated as a disabled subchannel bitmap. The subchannels for measuring channel characteristics may be equal to or a subset of the subchannel(s) that is not punctured.

公开(公告)号：WO2021183788A1

公开(公告)日：2021-09-16

申请号：PCT/US2021/021948

申请日：2021-03-11

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： SUN, Li Hsiang ,  LOU, Hanqing ,  YANG, Rui ,  WANG, Xiaofei

IPC: H04L1/00 ,  H04L1/16 ,  H04L1/18

Abstract: A method to transmit data from a wireless apparatus includes determining an information block length corresponding to an error correction code, inserting padding bits into at least one protocol data unit, PDU, of a plurality of PDUs such that a padded PDU size is an integer multiple of the determined information block length, and wherein each PDU in a frame of PDUs to be transmitted comprises a PDU size that is an integer multiple of the determined information block length, and transmitting the frame encoded by the error correction code with the determined information block length to a wireless receiver.

公开(公告)号：WO2021011387A1

公开(公告)日：2021-01-21

申请号：PCT/US2020/041633

申请日：2020-07-10

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： LOU, Hanqing ,  SUN, Li-Hsiang ,  YANG, Rui ,  LEVY, Joseph S. ,  WANG, Xiaofei

IPC: H04L1/00 ,  H04W84/12

Abstract: Methods and apparatuses are described herein for feedback based midamble adaptation. For example, a first station (STA) may transmit, to a second STA, a request frame that includes an indicator indicating a request for midamble information. The first STA may receive, from the second STA, a response frame that includes the midamble information determined by the second STA based on one or more channel measurements associated with the second STA. The midamble information may include a midamble report, a Doppler measurement report, or the like. The midamble report or the Doppler measurement report may include at least one of a midamble periodicity, a mobility/Doppler level, or the like. Based on the midamble information, the first STA may generate a physical layer convergence procedure (PLCP) protocol data unit (PPDU) that includes at least one midamble within a data portion of the PPDU.

公开(公告)号：WO2020097487A1

公开(公告)日：2020-05-14

申请号：PCT/US2019/060508

申请日：2019-11-08

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： OTERI, Oghenekome ,  SAHIN, Alphan ,  WANG, Xiaofei ,  LOU, Hanqing ,  SUN, Li-Hsiang ,  YANG, Rui ,  LA SITA, Frank

IPC: H04W76/15

Abstract: Methods and apparatuses are described herein for multiple AP coordination in wireless local area networks (WLANs). For example, a station (STA) may receive, from a first access points (APs), a probe response frame that includes one or more indicators indicating multiple AP operation capabilities of the first AP and a second AP. The STA may transmit, to at least one of the first AP or the second AP, a multiple AP association request frame that enables the first AP to be associated with the second AP for a multiple AP operation. The STA may receive, from the first AP, a first multiple AP association response frame indicating acceptance or rejection of the multiple AP operation with the first AP. The STA may receive, from the second AP, a second multiple AP association response frame indicating acceptance or rejection of the multiple AP operation with the second AP.

公开(公告)号：WO2018165648A1

公开(公告)日：2018-09-13

申请号：PCT/US2018/021932

申请日：2018-03-12

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： OTERI, Oghenekome ,  LOU, Hanqing ,  WANG, Xiaofei ,  SUN, Li-Hsiang ,  YANG, Rui

IPC: H04B7/06 ,  H04B7/08 ,  H04W16/28

Abstract: A method, apparatus, and system for beamforming training using a wireless transmit receive unit (WTRU). A WTRU may receive an indication of a number of space time slots (STSs) from an access point (AP) within a beacon frame during a beamforming training allocation. The WTRU may send a response signal to the AP in a specific STS based on a function of the number of STSs. The WTRU may receive an acknowledgement (ACK) from the AP confirming the response was received. Alternatively, the AP may send a signal indicating that a collision occurred and alter the number of STSs, and the WTRU may try again in the next beamforming training allocation.

公开(公告)号：WO2018085569A1

公开(公告)日：2018-05-11

申请号：PCT/US2017/059765

申请日：2017-11-02

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： OTERI, Oghenekome ,  LOU, Hanqing ,  SAHIN, Alphan ,  YANG, Rui ,  LIN, Cen ,  WANG, Xiaofei ,  SUN, Li-Hsiang

IPC: H04B7/06

Abstract: Systems and methods for multidimensional beam refinement procedures and signaling for millimeter wave WLANs. In some embodiments, there are multi-dimensional enhanced beam refinement protocol MAC and PHY frame designs that extend the MAC packet and the PPDU format with or without backwards compatibility. The multiple dimensions may be supported jointly or separately. In other embodiments, the increased data signaled in the eBRP frame designs may be more efficiently signaled with reduced BRP frame sizes, such as through a training type dependent BRP minimum duration selection procedure or use of null data packet BRP frames. In further embodiments, the maximum duration of the interframe spacing between BPR packets may be varied to improve the efficiency of BRP operation.

Abstract translation: 用于毫米波WLAN的多维波束优化程序和信令的系统和方法。 在一些实施例中，存在多维增强型波束优化协议MAC和PHY帧设计，其扩展具有或不具有向后兼容性的MAC分组和PPDU格式。 多个维度可以共同支持或单独支持。 在其它实施例中，例如通过训练类型相关BRP最小持续时间选择过程或使用空数据分组BRP帧，在eBRP帧设计中用信号发送的增加的数据可以用更低的BRP帧大小更高效地用信号通知。 在进一步的实施例中，BPR分组之间的帧间间隔的最大持续时间可以变化，以提高BRP操作的效率。

公开(公告)号：WO2018017977A1

公开(公告)日：2018-01-25

申请号：PCT/US2017/043331

申请日：2017-07-21

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： LOU, Hanqing ,  SAHIN, Alphan ,  WANG, Xiaofei ,  YANG, Rui ,  OTERI, Oghenekome ,  SUN, Li-Hsiang

IPC: H04B7/0417 ,  H04B7/0452 ,  H04B7/06

Abstract: An AP/PCP may perform user selection/pairing/grouping based on a measurement of an analog transmission (e.g., signal to noise ratio (SNR) or signal to interference plus noise ratio (SINR)). The SNRs may be used, for example by the station, to determine best beams and/or beam pairs and/or worst beams and/or beam pairs. A station may feed back the best few beams and/or beam pairs for a Tx and Rx virtual antenna pair. A station may feed back the worst few beams for the Tx and Rx virtual antenna pair. The AP/PCP may receive the indication(s) and/or use the indication(s) to group the stations.

Abstract translation: 基于模拟传输（例如，信噪比（SNR）或信号与干扰加噪声比（SINR））的测量，AP / PCP可以执行用户选择/配对/分组。 例如，该站可以使用SNR来确定最佳波束和/或波束对和/或最差波束和/或波束对。 一个站可以为Tx和Rx虚拟天线对反馈最好的几个波束和/或波束对。 一个站可以反馈Tx和Rx虚拟天线对中最差的几个波束。 AP / PCP可以接收指示和/或使用指示来对这些站进行分组。

公开(公告)号：WO2016176595A1

公开(公告)日：2016-11-03

申请号：PCT/US2016/030164

申请日：2016-04-29

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： WANG, Xiaofei ,  XI, Fengjun ,  LOU, Hanqing ,  OLESEN, Robert L. ,  LA SITA, Frank ,  ZHANG, Guodong

IPC: H04L1/16 ,  H04L1/18

CPC classification number: H04L1/1887 ,  H04L1/1614 ,  H04L1/1864 ,  H04L1/1896 ,  H04L5/0007

Abstract: Methods and systems for negotiating an ACK policy between a STA and an AP operating in a LAN are provided. Transmission of a modified ULR frame from a STA to an AP is provided. The ULR frame may include information related to a traffic stream for which the STA is requesting one or more transmission opportunities. The related information may include a determined priority associated with the traffic stream and a requested ACK type. The transmission opportunity may be one or more of a single user transmission opportunity, part of a multi-user transmission opportunity, or a peer-to-peer transmission opportunity.

Abstract translation: 提供了在STA和在LAN中操作的AP之间协商ACK策略的方法和系统。 提供了从STA到AP的修改的ULR帧的传输。 ULR帧可以包括与STA正在请求一个或多个传输机会的业务流相关的信息。 相关信息可以包括与业务流相关联的确定的优先级和所请求的ACK类型。 传输机会可以是单个用户传输机会，多用户传输机会的一部分或对等传输机会中的一个或多个。

公开(公告)号：WO2015187860A1

公开(公告)日：2015-12-10

申请号：PCT/US2015/034035

申请日：2015-06-03

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： OTERI, Oghenekome ,  WANG, Xiaofei ,  ZHANG, Guodong ,  XIA, Pengfei ,  LOU, Hanqing ,  LA SITA, Frank ,  GHOSH, Monisha ,  SHAH, Nirav, B. ,  OLESEN, Robert, L.

IPC: H04W74/08

CPC classification number: H04W74/0816

Abstract: Systems, methods and instrumentalities are disclosed to enable reception failure identification and remediation for collision aware transmission for WiFi. A station (STA) for channel coordination may include a transceiver and a controller configured to adjust a clear channel assessment threshold based on collision statistics within a network. Channel coordination for reception failure identification and remediation may be conducted. An access point (AP) may receive feedback from one or more stations, where feedback comprises collision statistics. The AP may estimate a collision statistic for each of the stations. The AP may adjust a clear channel assessment threshold based on collision statistics within a network. The AP may send collision statistics to the stations.

Abstract translation: 公开了系统，方法和手段，以便能够接收故障识别和补救用于WiFi的碰撞感知传输。 用于信道协调的站（STA）可以包括收发机和被配置为基于网络内的冲突统计调整清除信道评估阈值的控制器。 可以进行接收故障识别和修复的信道协调。 接入点（AP）可以从一个或多个站接收反馈，其中反馈包括冲突统计。 AP可以估计每个站的冲突统计量。 AP可以基于网络中的冲突统计来调整清除的信道评估阈值。 AP可以向站发送冲突统计信息。