公开(公告)号：US11438878B1

公开(公告)日：2022-09-06

申请号：US17211291

申请日：2021-03-24

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Jing Sun ,  Xiaoxia Zhang ,  Chih-Hao Liu

IPC: H04W72/02 ,  H04W72/04 ,  H04W80/02 ,  H04W28/02 ,  H04W74/08

Abstract: Sub-resource pools for transmission of new radio (NR) sidelink (NR SL) over unlicensed bands is disclosed. A user equipment (UE) capable for sidelink communications may receive a sidelink configuration message from a serving base station that includes identification of a plurality of channel access types associated with a plurality of sub-resource pools for autonomous sidelink access of a shared communication channel. The UE may obtain information for a sidelink transmission over a transmission resource pool allocated for the autonomous sidelink access and determine the plurality of sub-resource pools from available resources within the transmission resource pool according to a channel access type of each resource, wherein each sub-resource pool includes a subset of resources associated with a corresponding channel access type. The UE may then select a sub-resource pool for sidelink transmission and transmit the information on a transmission resource selected from the sub-resource pool.

公开(公告)号：US20220070825A1

公开(公告)日：2022-03-03

申请号：US17382681

申请日：2021-07-22

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Jing Sun ,  Xiaoxia Zhang ,  Junyi Li ,  Ozcan Ozturk ,  Chih-Hao Liu ,  Piyush Gupta

IPC: H04W72/02 ,  H04W72/04 ,  H04W72/12 ,  H04W28/26

Abstract: Methods, systems, and devices for wireless communications are described. The method includes receiving, from a second UE, a configuration for receipt of a sidelink resource pool message, determining that the first UE has information to be transmitted to the second UE via sidelink communications, receiving, in accordance with the configuration, the sidelink resource pool message, identifying, based on the sidelink resource pool message, a resource pool that includes sub-channels for sidelink communications to the second UE, and attempting to access a sub-channel of the resource pool in order to transmit the information to the second UE via sidelink communications.

公开(公告)号：US20210195641A1

公开(公告)日：2021-06-24

申请号：US17124964

申请日：2020-12-17

Applicant: QUALCOMM Incorporated

Inventor： Yisheng XUE ,  Xiaoxia Zhang ,  Chih-Hao Liu ,  Aleksandar Damnjanovic ,  Jing Sun ,  Yongbin Wei

IPC: H04W74/08 ,  H04W74/00 ,  H04W80/02 ,  H04B1/713 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device (base station or UE) may receive an indication of a listen before talk (LBT) gap for sharing a channel occupancy time (COT), the COT being acquired by another wireless device (base station or UE), and detect whether a slot within the COT is occupied by the other wireless device, the slot occurring prior to the LBT gap. The wireless device may also, responsive to detecting that the slot is occupied by the other wireless device, preform an LBT procedure during the LBT gap, and, responsive to a successful LBT procedure, transmit a signal to the other wireless device within the COT.

公开(公告)号：US20210195637A1

公开(公告)日：2021-06-24

申请号：US17090357

申请日：2020-11-05

Applicant: QUALCOMM INCORPORATED

Inventor： Yisheng Xue ,  Chih-Hao Liu ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei ,  Seyed Ali Akbar Fakoorian

IPC: H04W74/08 ,  H04W16/14

Abstract: Wireless communications systems and methods related to autonomous sidelink communication in a shared radio frequency band (e.g., in a shared spectrum or an unlicensed spectrum) are provided. A first user equipment (UE) performs a listen-before-talk (LBT) in a shared radio frequency band during at least a portion of a first sidelink frame. The first UE determines a channel occupancy time (COT) in the shared radio frequency band based on the LBT. A beginning of the COT is within the first sidelink frame and offset from a boundary of the first sidelink frame. The COT includes one or more sidelink frames subsequent to the first sidelink frame. The first UE transmits, in the shared radio frequency band, a COT indication signal at the beginning of the COT within the first sidelink frame. The COT indication signal includes COT sharing information for UEs to share the one or more sidelink frames.

公开(公告)号：US20210160892A1

公开(公告)日：2021-05-27

申请号：US17163797

申请日：2021-02-01

Applicant: QUALCOMM Incorporated

Inventor： Qingjiang Tian ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun ,  Chih-Hao Liu

IPC: H04W72/10 ,  H04W72/04 ,  H04W74/08

Abstract: Indication of transmission priority class is disclosed for sharing a base station's maximum channel occupancy time (MCOT) for use in autonomous uplink (AUL). Aspects of the disclosure provide for implicitly sharing the MCOT by providing an indication of transmission opportunity (TxOP) length. A serving base station sends an indication of a current TxOP length in control signals to a user equipment (UE). The UE may then infer a set of potential transmission priorities used by the serving base station according to the TxOP length, as TxOP length may relate to the MCOT, which itself may be associated with a particular transmission priority class. The UE may then, conservatively, select the highest transmission priority of the set of potential transmission priorities for autonomously transmitting any uplink data having at least the selected highest transmission priority within configured AUL resource of the current TxOP.

公开(公告)号：US20210076421A1

公开(公告)日：2021-03-11

申请号：US17012250

申请日：2020-09-04

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Jing Sun ,  Chih-Hao Liu ,  Yongbin Wei

IPC: H04W74/08 ,  H04W16/14 ,  H04W74/00

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment may monitor for a transmission over a set of periodically scheduled resources (e.g., semi-persistently scheduled resources)) of a downlink shared channel in an unlicensed spectrum. The user equipment may receive the transmission, where the transmission indicates a channel access configuration (e.g., a listen-before-talk configuration) for accessing the unlicensed spectrum. In some cases, the transmission may include a medium access control (MAC) control element (MAC-CE) that indicates the channel access configuration. The transmission may additionally indicate at least one uplink channel over which the user equipment may transmit a message and/or a channel occupancy time associated with a successful acquisition of the unlicensed spectrum by the base station. The user equipment may transmit a message (e.g., an acknowledgement) based on the channel access configuration.

公开(公告)号：US10912097B2

公开(公告)日：2021-02-02

申请号：US16276101

申请日：2019-02-14

Applicant: QUALCOMM INCORPORATED

Inventor： Qingjiang Tian ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun ,  Chih-Hao Liu

IPC: H04W72/10 ,  H04W72/04 ,  H04W74/08 ,  H04W88/02 ,  H04W88/08 ,  H04W74/04

Abstract: Indication of transmission priority class is disclosed for sharing a base station's maximum channel occupancy time (MCOT) for use in autonomous uplink (AUL). Aspects of the disclosure provide for implicitly sharing the MCOT by providing an indication of transmission opportunity (TxOP) length. A serving base station sends an indication of a current TxOP length in control signals to a user equipment (UE). The UE may then infer a set of potential transmission priorities used by the serving base station according to the TxOP length, as TxOP length may relate to the MCOT, which itself may be associated with a particular transmission priority class. The UE may then, conservatively, select the highest transmission priority of the set of potential transmission priorities for autonomously transmitting any uplink data having at least the selected highest transmission priority within configured AUL resource of the current TxOP.

公开(公告)号：US10893523B2

公开(公告)日：2021-01-12

申请号：US15635000

申请日：2017-06-27

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tamer Kadous ,  Chih-Hao Liu ,  Chirag Patel ,  Alberto Rico Alvarino

IPC: H04W72/04 ,  H04W74/08 ,  H04W4/70 ,  H04W28/26 ,  H04W16/14 ,  H04W88/02 ,  H04W88/08 ,  H04L1/12 ,  H04B1/713 ,  H04L1/18 ,  H04L29/08 ,  H04L5/00 ,  H04L5/14

Abstract: A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

公开(公告)号：US10798602B2

公开(公告)日：2020-10-06

申请号：US16046868

申请日：2018-07-26

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Chih-Hao Liu ,  Tamer Kadous

IPC: H04W4/00 ,  H04W24/10 ,  H04B1/713 ,  H04W72/04 ,  H04W36/00 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for cell measurement associated with a frequency hopping system. The base station may then receive a measurement report based on the configuration. A user equipment (UE) may receive a configuration for cell measurement associated with a frequency hopping system. The UE may generate a measurement report based on the configuration. The UE may then transmit the measurement report to a serving base station.

公开(公告)号：US20200084759A1

公开(公告)日：2020-03-12

申请号：US16563730

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Seyed Ali Akbar Fakoorian ,  Srinivas Yerramalli ,  Qingjiang Tian ,  Andrei Dragos Radulescu ,  Tamer Kadous

IPC: H04W72/04 ,  H04W72/08 ,  H04L5/00 ,  H04W24/10

Abstract: Generally, the described techniques provide for a base station transmitting an indication of a set of one or more available channels to a user equipment (UE). The base station may transmit to the UE a first downlink burst using a first channel and a first frame period. In some cases, the base station may detect interference associated with the first downlink burst, for example, by performing a listen-before-talk (LBT) procedure or through an interference management resources (IMR) procedure in which the base station transmits reference signal signals to the UE that the UE may use to return a report on measured interference. If the base station detects interference, the base station may transmit to the UE an instruction to switch to a second channel and a second frame period, where the second channel may be selected from the set of one or more available channels.