公开(公告)号：US11184902B2

公开(公告)日：2021-11-23

申请号：US16593828

申请日：2019-10-04

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Tao Luo ,  Makesh Pravin John Wilson

IPC: H04W56/00 ,  H04W72/12 ,  H04W72/10 ,  H04W72/04 ,  H04L1/00 ,  H04W76/27 ,  H04B7/06

Abstract: Methods, systems, and devices for wireless communications are described. A base station may transmit a configuration indicating a transmission configuration indicator (TCI) state switching pattern and a TCI state switching period to a user equipment (UE). The UE may perform TCI state switching according to the TCI state switching pattern and period, and the UE may receive a downlink transmission according to the TCI state switching pattern. The UE may receive a downlink control information (DCI) including an indication of a TCI state for a subsequent TTI. The UE may receive the downlink signal in accordance with both the TCI state switching pattern and the indication in the DCI. The UE may receive a configuration message indicating a first DCI state, receive a DCI indicating a second TCI state for a subsequent TTI, switch to the second TCI state, and receive a downlink signal using the second TCI state.

公开(公告)号：US20210360686A1

公开(公告)日：2021-11-18

申请号：US17318611

申请日：2021-05-12

Applicant: QUALCOMM Incorporated

Inventor： Mahmoud Taherzadeh Boroujeni ,  Tao Luo ,  Peter Gaal ,  Juan Montojo ,  Jing Sun ,  Iyab Issam Sakhnini ,  Olufunmilola Omolade Awoniyi-Oteri

IPC: H04W72/14 ,  H04W72/12 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communications are described in which one or more semi-persistent scheduling (SPS) configurations may provide periodic resources for communications between a base station and a user equipment (UE). One or more of the SPS configurations may also provide alternative resources that may be used for the communications in the event that a communication on the periodic or dynamically scheduled resources is cancelled. In the event that the base station transmits a cancellation indicator that cancels one or more of the communications, it may be determined whether to use the alternative resources for the associated communication. The determination to sue the alternative resources may be based on a time duration of the cancellation, a frequency portion of the cancelled resources, or combinations thereof.

公开(公告)号：US20210360653A1

公开(公告)日：2021-11-18

申请号：US17306478

申请日：2021-05-03

Applicant: QUALCOMM Incorporated

Inventor： Mostafa Khoshnevisan ,  Xiaoxia Zhang ,  Jing Sun ,  Peter Gaal ,  Tao Luo

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

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive, from a first base station, downlink transmissions associated with a first value of a pool index. The UE may receive, from a second base station, downlink transmissions associated with a second value of a pool index. The transmissions associated with the first pool index may overlap (e.g., in time, frequency, or both) with those associated with the second pool index. The UE may then determine (e.g., according to a set of rules) which of the overlapping transmissions to receive. In some examples, the UE may determine which of the overlapping transmissions to received based on the pool index associated with the transmissions.

公开(公告)号：US20210359818A1

公开(公告)日：2021-11-18

申请号：US17318855

申请日：2021-05-12

Applicant: QUALCOMM Incorporated

Inventor： Ahmed Abdelaziz Ibrahim Abdelaziz Zewail ,  Xiaoxia Zhang ,  Zhifei Fan ,  Jing Sun ,  Tao Luo

IPC: H04L5/00 ,  H04L1/20 ,  H04L27/26 ,  H04L1/00 ,  H04B7/01

Abstract: Wireless communication techniques that include PTRS resource density recommendation and selection techniques are discussed. A UE may transmit to a base station a set of phase tracking reference signal (PTRS) resource density recommendations that are determined based, at least in part, on a block error rate (BLER). The base station may transmit to the UE an indication of PTRS resource densities to use for wireless communication of the PTRS based, at least in part, on the BLER associated with the received set of PTRS resource density recommendations. The base station and/or the UE may at least one of receive or transmit a PTRS based, at least in part, on the indicated PTRS resource densities. Other aspects and features are also claimed and described.

公开(公告)号：US11172504B2

公开(公告)日：2021-11-09

申请号：US16562687

申请日：2019-09-06

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Jing Sun ,  Yongbin Wei ,  Tamer Kadous

IPC: H04J1/16 ,  H04W74/00 ,  H04L5/00 ,  H04W16/14 ,  H04W72/04

Abstract: Coordination of listen before talk (LBT) structure in new radio (NR) unlicensed (NR-U) multi-channel access operations is disclosed. In one aspect, when a base station determines to access shared communication spectrum, it may transmit an LBT structure signal that identifies the current LBT structure. The base station would then attempt access to the shared spectrum according to the LBT structure. In another aspect, a coordination server is used to manage access to the shared spectrum. Each node desiring access registers with the coordination server, which provides access parameters for the accessing node to use that increases the likelihood of successful access. The accessing nodes will transmit the selected access configuration used to access the shared spectrum, wherein the access configuration is selected based on the access parameters.

公开(公告)号：US20210336721A1

公开(公告)日：2021-10-28

申请号：US17324625

申请日：2021-05-19

Applicant: QUALCOMM Incorporated

Inventor： Mostafa Khoshnevisan ,  Jing Sun ,  Kapil Bhattad ,  Xiaoxia Zhang

IPC: H04L1/16 ,  H04W72/12 ,  H04W72/04 ,  H04B7/0456

Abstract: Methods, systems, and devices for wireless communications are described that support group-based acknowledgment feedback techniques. Two or more different groups of downlink transmissions may each have an associated transport block (TB) level or code block group (CBG) level group-based acknowledgment feedback, and a base station may transmit downlink control information to a UE that indicates one or more parameters that are used to determine which downlink transmissions are to be reported in the group-based feedback at a TB level, CBG level, or combinations thereof. Based on the parameters in the downlink control information, the UE may determine the feedback to be reported, and a timing for when to transmit the feedback to the base station.

公开(公告)号：US11159289B2

公开(公告)日：2021-10-26

申请号：US16449249

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi Chen ,  Peter Gaal ,  Jing Sun ,  Hao Xu ,  Srinivas Yerramalli

IPC: H04L5/00 ,  H04L5/14 ,  H04W72/04 ,  H04W56/00

Abstract: An apparatus may use inactive uplink portions of a downlink CC to transmit SRS to an eNB. At times there may be a collision between the SRS transmission and uplink transmissions or downlink transmissions on another CC. The apparatus receives a carrier aggregation configuration for a first downlink CC and a second CC, determines to transmit an uplink transmission on the second CC or to receive a downlink transmission on the second CC, determines that the SRS would at least partially collide with the uplink transmission or the downlink transmission, and determines to adjust at least one of the uplink transmission, the SRS transmission, or reception of the downlink transmission based on the determination of the collision and an interruption time to transmit the SRS in the uplink portion of the first CC.

公开(公告)号：US11147102B2

公开(公告)日：2021-10-12

申请号：US16263887

申请日：2019-01-31

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Jing Sun ,  Zhifei Fan ,  Yan Zhou ,  Tao Luo

IPC: H04W74/08 ,  H04L27/26 ,  H04B17/327 ,  H04L27/00

Abstract: Methods, systems, and devices for wireless communications are described that provide for aggregating random access requests across two or more physical random access channel (PRACH) occasions. Poor channel quality may inhibit the receipt of random access requests, and for user equipments (UEs) located in areas with relatively poor coverage, such aggregated random access requests may have an increased likelihood of successful receipt at a base station. The base station may configure a number of PRACH occasions to be available for aggregation of random access requests. A UE may receive PRACH configuration information from the base station, may aggregate a random access request across two or more PRACH occasions using the PRACH configuration information, and may transmit the aggregated random access request via the PRACH occasions. The base station may also configure one or more PRACH occasions to have a smaller subcarrier spacing for transmission of a random access request.

公开(公告)号：US11140720B2

公开(公告)日：2021-10-05

申请号：US16661609

申请日：2019-10-23

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Jing Sun ,  Aleksandar Damnjanovic ,  Srinivas Yerramalli ,  Ozcan Ozturk

IPC: H04W72/00 ,  H04W74/08 ,  H04W74/00 ,  H04W56/00 ,  H04W76/11 ,  H04L1/18 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. The method includes identifying that the user equipment (UE) is to use a two-step random access channel (RACH) procedure that includes a first message (e.g., uplink request message) and a second message (e.g., downlink response). The methods include sending, as a first message of the two-step RACH procedure, the uplink request message to a base station, receiving, from the base station, a physical downlink control channel comprising an indication of resources of a broadcast or multicast physical downlink shared channel on which the downlink response is to be received, and receiving the downlink response from the base station on the broadcast or multicast physical downlink shared channel. The physical downlink shared channel may be configured to provide downlink responses for one or multiple UEs.

公开(公告)号：US11140714B2

公开(公告)日：2021-10-05

申请号：US15619094

申请日：2017-06-09

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Peter Gaal ,  Wanshi Chen ,  Hao Xu ,  Jing Sun

IPC: H04W74/08 ,  H04L5/00 ,  H04W52/32 ,  H04W72/04 ,  H04W52/34

Abstract: Certain aspects of the disclosure relate to techniques and apparatus for improving random access for SRS switching in a wireless network. Prior to transmitting a SRS, a UE may interrupt communication on a first carrier to switch from the first carrier to a second carrier to transmit a PRACH. To reduce interruption to the first carrier, the UE may use the beginning symbol(s) of a UpPTS on the second carrier to transmit the PRACH. In addition, to reduce interruption to the first carrier, the UE may monitor for another PDCCH order before transmitting another PRACH. Further, aspects of the present disclosure provide techniques and apparatus for jointly triggering SRS transmissions and performing power control for SRS transmissions. A BS may trigger SRS transmissions from multiple UEs, trigger SRS transmissions from multiple carriers from the same UE at the same time and/or perform power control separately for each carrier.