公开(公告)号：US20130301551A1

公开(公告)日：2013-11-14

申请号：US13838915

申请日：2013-03-15

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Monisha Ghosh ,  Xiaofei Wang ,  Hanqing Lou ,  Nirav B. Shah ,  Guodong Zhang ,  Frank La Sita

IPC: H04W72/04

CPC classification number: H04B7/0851 ,  H04B7/0404 ,  H04B7/0452 ,  H04B7/0628 ,  H04B7/0643 ,  H04B7/066 ,  H04B17/12 ,  H04L27/266 ,  H04W52/146 ,  H04W52/365 ,  H04W56/004 ,  H04W72/042 ,  H04W84/12 ,  H04W88/08

Abstract: WTRUs, access points (APs) and methods thereon are disclosed. A method on a WTRU may include receiving a message from an AP that comprises a beamformee capability element; sending a second message to the AP that comprises a beamformer capability element; and receiving, from the AP, a third message in response to the second message that indicates a group to which the WTRU is assigned. The group may be based on the beamformer capability element and the group may indicate UL transmission information to be used by the WTRU. A method on an AP may include determining a group for multiple WTRUs based on a received beamformer capability element. A method on a WTRU may include sending to an AP a message with a low overhead preamble for UL MU-MIMO. The low overhead preamble may include LTFs that enable the AP to distinguish the WTRU from other WTRUs.

Abstract translation: WTRU，接入点（AP）及其上的方法被公开。 WTRU上的方法可以包括从AP接收包括波束形成器能力元素的消息; 向AP发送包括波束形成器能力元素的第二消息; 以及响应于指示所述WTRU被分配到的组的所述第二消息，从所述AP接收第三消息。 该组可以基于波束形成器能力元素，并且该组可以指示要由WTRU使用的UL传输信息。 AP上的方法可以包括基于接收到的波束形成器能力元素来确定用于多个WTRU的组。 WTRU上的方法可以包括向AP发送具有用于UL MU-MIMO的低开销前导码的消息。 低开销前导码可以包括使得AP能够区分WTRU与其他WTRU的LTF。

公开(公告)号：US20130230035A1

公开(公告)日：2013-09-05

申请号：US13782709

申请日：2013-03-01

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Sudheer A. Grandhi ,  Monisha Ghosh ,  Hanqing Lou ,  Lei Wang ,  Xiaofei Wang ,  Guodong Zhang

IPC: H04W48/20

CPC classification number: H04W48/20 ,  H04B7/0456 ,  H04B7/0617 ,  H04W48/12 ,  H04W48/16

Abstract: A method for beacon information provisioning, transmissions and protocol enhancements includes defining multiple level beacons based on the attributes of beacon information fields/elements. A short beacon may be used in addition to a primary beacon in space-time block code (STBC) modes, non-STBC modes and in multiple bandwidth modes. The short beacons may also be used for Fast Initial Link Setup (FILS) and to extend system coverage range. Beacon transmissions may use adaptive modulation and coding set/scheme (MCS).

Abstract translation: 用于信标信息提供，传输和协议增强的方法包括基于信标信息字段/元素的属性定义多级信标。 除了空时块（STBC）模式，非STBC模式和多个带宽模式中的主信标之外，还可以使用短信标。 短信标也可用于快速初始链路设置（FILS），并扩展系统覆盖范围。 信标传输可以使用自适应调制和编码集/方案（MCS）。

公开(公告)号：US12237885B2

公开(公告)日：2025-02-25

申请号：US18236238

申请日：2023-08-21

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Hanqing Lou ,  Alphan Sahin ,  Xiaofei Wang ,  Rui Yang ,  Oghenekome Oteri ,  Li-Hsiang Sun

IPC: H04B7/0452 ,  H04B7/06 ,  H04W84/12

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.

公开(公告)号：US12225494B2

公开(公告)日：2025-02-11

申请号：US18211509

申请日：2023-06-19

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Oghenekome Oteri ,  Alphan Sahin ,  Xiaofei Wang ,  Hanqing Lou ,  Li-Hsiang Sun ,  Rui Yang ,  Frank La Sita

IPC: H04W4/00 ,  H04W8/00 ,  H04W60/04 ,  H04W84/12

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：US20250048429A1

公开(公告)日：2025-02-06

申请号：US18921420

申请日：2024-10-21

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Hanqing Lou ,  Xiaofei Wang ,  Oghenekome Oteri ,  Robert L. Olesen

IPC: H04W74/0808 ,  H04W84/12

Abstract: A STA may comprise a receiver configured to receive, from an AP, a first polling frame addressed to a broadcast address and sent to a plurality of STAs. The first polling frame may indicate a plurality of sub-channels. The STA may further comprise a transmitter configured to transmit, to the AP, a first PPDU indicating SNR information, on one or more sub-channels of the plurality of sub-channels, a SIFS after the first polling frame is received. The transmitter may be configured to transmit the first PPDU while a second PPDU is transmitted to the AP by another STA of the plurality of STAs, wherein the second PPDU is transmitted on one or more other sub-channels of the plurality of sub-channels.

公开(公告)号：US12199721B2

公开(公告)日：2025-01-14

申请号：US15743408

申请日：2016-07-01

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Oghenekome Oteri ,  Hanqing Lou ,  Rui Yang ,  Robert L. Olesen ,  Alphan Sahin ,  Li-Hsiang Sun

IPC: H04B7/06 ,  H04B7/0417 ,  H04W24/10 ,  H04W88/08

Abstract: An access point (AP) may transmit a null data packet announcement (NDPA) with an indication of a resource unit of a bandwidth that feedback is requested. The AP may transmit a null data packet (NDP) for measurement of a channel quality for a resource unit of a bandwidth. The AP may transmit, based on a response, another feedback request for resource units of the bandwidth.

公开(公告)号：US20240414755A1

公开(公告)日：2024-12-12

申请号：US18809691

申请日：2024-08-20

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Li-Hsiang Sun ,  Hanqing Lou ,  Alphan Sahin ,  Xiaofei Wang ,  Rui Yang ,  Frank La Sita

IPC: H04W74/00 ,  H04B17/318 ,  H04W72/0453 ,  H04W72/56 ,  H04W74/08

Abstract: Methods and apparatuses for enhancing random access procedures are described herein. A method performed by a station (STA) may include receiving, from an access point (AP), a physical layer convergence procedure (PLCP) protocol data unit (PPDU) in one of an upper frequency band or a lower frequency band. The PPDU may include a trigger frame. The trigger frame may include information indicating an allocation of a plurality of random access (RA) resource units (RA-RUs). Each of the RA-RUs may be associated with one of the upper frequency band or the lower frequency band. The method may include selecting one of the plurality of allocated RA-RUs and transmitting, to the AP, a message using the selected RA-RU.

公开(公告)号：US20240380420A1

公开(公告)日：2024-11-14

申请号：US18763594

申请日：2024-07-03

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Chunxuan Ye ,  Hanqing Lou ,  Fengjun Xi ,  Kyle Jung-Lin Pan

IPC: H03M13/00 ,  H03M13/09 ,  H03M13/11

Abstract: An apparatus and method are described. The apparatus includes a transceiver and processor, which attach transport block (TB) level CRC bits to a TB, select an LDPC base graph (BG) based on a code rate (CR) and TB size of the TB including TB level CRC bits, determine a number of code blocks (CBs) to use for segmenting the TB including TB level CRC bits depending on the selected LDPC BG, determine a single CB size for each of the CBs based on the number of CBs, segment the TB including TB level CRC bits into the CBs based on the number of CBs and CB size, pad zeros to a last CB of the CBs in the segmented TB, attach CB level CRC bits to each CB in the segmented TB, encode each CB in the segmented TB using the selected LDPC base graph, and transmit the encoded CBs.

公开(公告)号：US12143180B2

公开(公告)日：2024-11-12

申请号：US15521475

申请日：2015-10-22

Applicant: InterDigital Patent Holdings, Inc.

Inventor： Yuan Sheng Jin ,  Fengjun Xi ,  Pengfei Xia ,  Nirav B. Shah ,  Hanqing Lou ,  Robert L. Olesen ,  Oghenekome Oteri

IPC: H04B7/06 ,  H04B7/0452 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W84/12

Abstract: An access point (AP) in a high efficiency (HE) wireless local area network (WLAN) may transmit a message specifying to a group of stations a guard interval from one of two different guard intervals. The AP may receive responses from the group of stations with the specified one of the two different guard intervals for multi-user uplink HE WLAN communication.

公开(公告)号：US20240349398A1

公开(公告)日：2024-10-17

申请号：US18683977

申请日：2022-08-18

Applicant: INTERDIGITAL PATENT HOLDINGS, INC.

Inventor： Xiaofei Wang ,  Hanqing Lou ,  Rui Yang

IPC: H04W76/40 ,  H04W48/10 ,  H04W84/12

CPC classification number: H04W76/40 ,  H04W48/10 ,  H04W84/12

Abstract: Disclosed herein are apparatus and methods for enhancing broadcast services in wireless local area networks (WLAN). Embodiments provide systems, apparatus and methods that ensure a mobile transceiver (STA) receiving a broadcast stream, receives the stream in a continuous and seamless manner as the STA moves from an area covered by a first AP into an area covered by a second AP. Further embodiments provide systems, apparatus and methods by which an Access Point acquires channel sounding information from one or more sensor devices comprising transceiver stations (STA) to provide enhanced broadcast channel condition services to STA operating within the AP coverage area.