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公开(公告)号：US10833712B2
公开(公告)日：2020-11-10
申请号：US16415680
申请日：2019-05-17
Applicant: InterDigital Patent Holdings, Inc.
Inventor： Fengjun Xi , Yuan Sheng Jin , Pengfei Xia , Oghenekome Oteri , Hanqing Lou , Nirav B. Shah , Robert L. Olesen
Abstract: A wireless transmit/receive unit (WTRU) may receive a constellation symbol that includes indications that each are associated with a respective WTRU of a plurality of WTRUs. The WTRU may determine that a first weight associated with a first indication of the indications is different than a second weight associated with a second indication of the indications. The indications may comprise indications of bits modulated at a multi-user constellation bit division multiple access modulator (MU-CBDMAM).
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公开(公告)号：US20200350979A1
公开(公告)日：2020-11-05
申请号：US16934320
申请日：2020-07-21
Applicant: InterDigital Patent Holdings, Inc.
Inventor： Guodong Zhang , Xiaofei Wang , Hanqing Lou , Sudheer A. Grandhi
Abstract: A method performed by STA may comprise receiving, from a first AP, a first beacon frame comprising a first relay information element including a first field that indicates whether a root AP BSSID field is included in the first relay information element, determining that a first root AP BSSID field is included in the first relay information element and determining that the first AP is a relay AP of a root AP identified by the first root AP BSSID field. The method may further comprise receiving, from a second AP, a second beacon frame comprising a second relay information element including a second field that indicates whether a root AP BSSID is included in the second relay information element and determining that a root AP BSSID field is not included in the second information element and determining that the second AP is a root AP.
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公开(公告)号：US10764014B2
公开(公告)日：2020-09-01
申请号：US15962831
申请日：2018-04-25
Applicant: InterDigital Patent Holdings, Inc.
Inventor： Xiaofei Wang , Hanqing Lou , Monisha Ghosh , Sudheer A. Grandhi
Abstract: A method and apparatus for operation by an access point (AP) is provided. The method may comprise receiving a first frame from a first STA, the first frame including first data and receiving a second frame from a second STA, the second frame including second data. In response to the receiving, an acknowledgement (ACK) frame may be transmitted to the first STA and to the second STA. The ACK frame may be addressed to a broadcast address and include a field which indicates whether the ACK frame is a multiple traffic identifier (multi-TID) block ACK frame format or another ACK frame format.
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公开(公告)号：US10707934B2
公开(公告)日：2020-07-07
申请号：US16083757
申请日：2017-03-10
Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
Inventor： Oghenekome Oteri , Alphan Sahin , Hanqing Lou , Xiaofei Wang , Cen Lin
IPC: H04B7/06 , H04B7/0417 , H04B7/0456 , H04W84/12 , H04B7/0491 , H04L27/18
Abstract: Systems, methods, and instrumentalities are disclosed for multi-resolution training, for example, in millimeter wave (mmW) WLAN systems. In a Multi-Resolution Beam Refinement Protocol (MR-BRP), an access point (AP)/PBSS control point (PCP) and a station (STA) may perform multi-resolution beamforming training, for example, by changing a sub-beam resolution or by maintaining sub-beam resolution while changing a resolution of the beamforming training between levels or stages of training. Sub-beam resolution may be changed, for example, by assigning different angular spreads to or by downselecting a number of antenna elements while keeping inter-element spacing constant between levels of training. Resolution of beamforming training may be changed, for example, by downsampling sub-beams or by downsampling antenna elements while adjusting inter-element spacing. Beamforming training (e.g. refinement) levels may refine beams by changing a resolution of antenna weight vectors (AWVs). An AP/PCP and STA may search through a sector multiple times with sub-beams of different resolution to identify a correct pair of sub-beams at a desired resolution. MR-BRP may be used for single or multiple beams, for example, to generate M sub-beams (AWVs) for N beams sequentially or in parallel. MR-BRP may be used for beam tracking. Devices may save the best sub-beam at each level of MR-BRP and may revert (fall back) to a sub-beam at previous level. MR-BRP signaling may indicate MR-BRP capability, type, frame format, etc.
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95.发明申请
公开(公告)号：US20200178171A1
公开(公告)日：2020-06-04
申请号：US16610994
申请日：2018-05-07
Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
Inventor： Hanqing Lou , Xiaofei Wang , Oghenekome Oteri , Alphan Sahin , Li-Hsiang Sun , Rui Yang
Abstract: Procedures and mechanisms for narrowband multi-channel transmission for wakeup radio (WUR) operation are disclosed. A station (STA) operating in WUR mode may have its a primary connectivity radio (PCR) turned off and its WUR turned and operating according to previously negotiated WUR operating parameters. The STA may monitor, for WUR beacons and frames over a first WUR channel, and determine that the first WUR channel does not support reliable transmission based on no beacons being received within a first duration. The STA may turn off the WUR, and turn on the PCR to send a first short WUR frame including a wakeup reason, and receive a second short WUR frame with a WUR channel assignment. The STA may turn off the PCR, turn on the WUR, and monitor for WUR signals on a second WUR channel according to the WUR channel assignment and the previously negotiated WUR operating parameters.
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公开(公告)号：US20200162135A1
公开(公告)日：2020-05-21
申请号：US16611188
申请日：2018-05-03
Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
Inventor： Li Hsiang Sun , Hanqing Lou , Alphan Sahin , Oghenekome Oteri , Rui Yang , Xiaofei Wang , Frank La Sita
IPC: H04B7/0417 , H04B7/06 , H04B17/318 , H04B17/336 , H04W80/08 , H04B7/08 , H04B7/0456
Abstract: A single input single output (SISO) data transmission may solicit a multiple input multiple output (MIMO) rank adaptation information. A number of transmit chain for transmission may be determined, e.g., by an access point (AP). A physical layer convergence procedure (PLCP) protocol data unit (PPDU) may be transmitted, e.g., to a station (STA). The PPDU may include data and training (TRN) sequences. The number of TRN sequences may be equal to the number of transmit chains. The PPDU may include information associated with the determined number of transmit chains for transmission. Feedback may be received, e.g., from the STA. The feedback may include information that identifies a transmit chain associated with the transmitted TRN sequences and/or a channel measurement associated with the identified transmit chain. A subsequent PPDU may be transmitted based on the channel measurement associated with the identified transmit chain from the received feedback.
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公开(公告)号：US20200059342A1
公开(公告)日：2020-02-20
申请号：US16609976
申请日：2018-04-30
Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
Inventor： Alphan Sahin , Oghenekome Oteri , Hanqing Lou , Xiaofei Wang , Li Hsiang Sun , Rui Yang
Abstract: A wireless transmit/receive unit (WTRU) may be configured to perform wake up radio (WUR) for one or more WUR receivers. For example, the WTRU may transmit a common preamble to a first WUR receiver using a first frequency range. The WTRU may transmit a first WUR packet to the WUR receiver, after the common preamble. The WTRU may transmit the common preamble to a second WUR receiver using a second frequency range. The WTRU may transmit a second WUR packet after the common preamble, The bandwidth associated with the second WUR packet and the bandwidth associated with the first WUR packet may be smaller than the bandwidth associated with the common preamble, which may avoid interference from other transmitters {e.g., 802.11 transmitters, 802.11 stations, and 802.11 radios). The bandwidth associated with the first WUR packet and the bandwidth associated with the second WUR packet may not be coextensive with one another.
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公开(公告)号：US10568119B2
公开(公告)日：2020-02-18
申请号：US16083028
申请日：2017-03-09
Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
Inventor： Oghenekome Oteri , Hanqing Lou , Fengjun Xi , Rui Yang
Abstract: Method, apparatuses, and systems for multi-user (MU) transmission is provided, including scheduling, by an access point (AP), an uplink (UL) MU transmission for a group of wireless transmit/receive units (WTRUs) in which there is an indication that at least one resource unit (RU) of a plurality of RUs is silenced. The silencing may be based on coordinating with one or more overlapping APs or by analyzing conditions of channels associated with an AP.
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公开(公告)号：US10542555B2
公开(公告)日：2020-01-21
申请号：US16298712
申请日：2019-03-11
Applicant: InterDigital Patent Holdings, Inc.
Inventor： Xiaofei Wang , Hanqing Lou , Monisha Ghosh , Nirav B Shah , Guodong Zhang , Ronald Murias
IPC: H04W72/12 , H04W72/04 , H04W74/06 , H04W74/00 , H04L1/18 , H04W74/08 , H04L1/16 , H04L1/00 , H04W74/04 , H04B17/318 , H04W84/12
Abstract: Methods and apparatuses are related to multi-user parallel channel access (MU-PCA). For example, a wireless transmit/receive unit (WTRU) is provided that is one of a plurality of WTRUs operable to simultaneously communicate via a plurality of channels managed by an access point (AP). The WTRU includes a receiver configured to receive, from the AP, over at least one channel of the plurality of channels, a group poll (G-Poll) message that includes a resource allocation that indicates at least one allocated channel of the plurality of channels for the WTRU; and a transmitter configured to transmit an uplink request message, to the AP in response to the G-Poll message, over the at least one allocated channel of the plurality of channels, the uplink request message corresponding to uplink data the WTRU has for transmission to the AP.
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100.发明授权
公开(公告)号：US10477576B2
公开(公告)日：2019-11-12
申请号：US15754847
申请日：2016-09-08
Applicant: INTERDIGITAL PATENT HOLDINGS, INC.
Inventor： Hanqing Lou , Guodong Zhang , Li-Hsiang Sun , Oghenekome Oteri , Robert L. Olesen , Fengjun Xi , Rui Yang , Xiaofei Wang
Abstract: A method and apparatus for multi-user concurrent random access for wireless local area networks (WLANs) is described. The method, implemented in a wireless transmit/receive unit (WTRU), includes detecting a trigger frame for uplink (UL) multi-user (MU) transmission. The trigger frame includes an assignment of resource units (RUs) for random access in upcoming UL MU packet data convergence protocol (PDCP) protocol data units (PPDUs) and an indication that the trigger frame is one of a plurality of trigger frames in a cascading sequence of trigger frames in an MU transmission opportunity (TxOP). The method further includes selecting one of the RUs in the assignment of RUs for a random access transmission and sending the random access transmission on the selected one of the RUs.
