公开(公告)号：US11516842B2

公开(公告)日：2022-11-29

申请号：US16829872

申请日：2020-03-25

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Ananta Narayanan Thyagarajan ,  Xiaoxia Zhang ,  Kapil Bhattad

IPC: H04W4/00 ,  H04W74/08 ,  H04W72/04

Abstract: This disclosure provides systems, methods and apparatus for a user equipment (UE), operating in a shared spectrum in a connected state or an idle state, to receive a channel occupancy time structure information (COT-SI) which includes one or more of a COT duration, a COT end symbol, and a COT pause indication, in addition to slot format indication for one or more slots. Some aspects described herein define a hierarchical approach to COT structure information (COT-SI) signaling. For example, a UE may be configured with a set of short COT tables using remaining minimum system information (RMSI) signaling and may receive concatenation of COT-SI signaling identifying index values in a control channel corresponding to one or more of the set of COT tables. Based on receiving COT-SI signaling, the UE may communicate in accordance with an occurrence of a COT.

公开(公告)号：US11304229B2

公开(公告)日：2022-04-12

申请号：US16689963

申请日：2019-11-20

Applicant: QUALCOMM INCORPORATED

Inventor： Kapil Bhattad ,  Xiaoxia Zhang ,  Tanumay Datta ,  Ananta Narayanan Thyagarajan ,  Jing Sun

IPC: H04W4/00 ,  H04W74/08 ,  H04W74/00 ,  H04W16/14

Abstract: Wireless communications systems and methods related to constraining no-listen-before-talk (LBT)-based transmissions during link direction switches in a frequency spectrum shared by multiple network operating entities are provided. A first wireless communication device, communicates, with a second wireless communication device, a configuration for determining whether to perform an LBT after a link direction switch. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first link direction during a channel occupancy time (COT) period of the first wireless communication device or the second wireless communication device. The first wireless communication device communicates, with the second wireless communication device, a second communication signal in a second link direction different from the first link direction during the COT period based on the configuration.

公开(公告)号：US11129196B2

公开(公告)日：2021-09-21

申请号：US16406624

申请日：2019-05-08

Applicant: QUALCOMM incorporated

Inventor： Kapil Bhattad ,  Jing Sun ,  Xiaoxia Zhang ,  Ananta Narayanan Thyagarajan ,  Tamer Kadous

IPC: H04W74/08 ,  H04W74/00 ,  H04L1/00 ,  H04W72/14 ,  H04W72/12 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may rate match an uplink transmission around a set of resources reserved by a base station. The base station may indicate a set of reserved resources which overlaps an uplink resource allocation to the UE. The base station may transmit an indicator of the reserved resources, and the UE may identify a location of a clear channel assessment (CCA) gap in a symbol period relative to the reserved resources. By rate matching around the reserved resources and one or more CCA gaps, the UE may transmit uplink information despite the allocated uplink resources colliding with the reserved resources.

公开(公告)号：US20210266882A1

公开(公告)日：2021-08-26

申请号：US17302916

申请日：2021-05-14

Applicant: QUALCOMM INCORPORATED

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Kapil Bhattad ,  Ananta Narayanan Thyagarajan

IPC: H04W72/04 ,  H04L27/26 ,  H04W56/00 ,  H04W74/08 ,  H04L27/00

Abstract: Wireless communications systems and methods related to signaling transmission starting offsets for uplink transmissions in a frequency spectrum shared by multiple network operating entities are provided. A first wireless communication device communicates, with a second wireless communication device, a cyclic prefix (CP) extension length configuration for providing a gap duration for a listen-before-talk (LBT) associated with a first communication signal. The first wireless communication device communicates, with the second wireless communication device, the first communication signal including a CP extension having a length based on the CP extension length configuration.

公开(公告)号：US20210058976A1

公开(公告)日：2021-02-25

申请号：US17093374

申请日：2020-11-09

Applicant: QUALCOMM Incorporated

Inventor： Pravjyot Singh Deogun ,  Xiaoxia Zhang ,  Ozcan Ozturk ,  Jing Sun ,  Kapil Bhattad ,  Ananta Narayanan Thyagarajan

IPC: H04W74/08

Abstract: Random access channel access and validity procedures are disclosed. In one aspect, the medium access control (MAC) indications multiple random access occasions (ROs) to user equipments (UEs) for random access transmissions. In such aspect, random access failure would only be declared if listen before talk (LBT) procedures for the random access transmission fail on all of the ROs indicated by the MAC layer. Similarly, in additional aspects, a UE will not apply a backoff value for any LBT failures for random access attempts that occur within an LBT time window. In further aspects, a UE may determine the validity of ROs that overlap with a discovery reference signal measurement timing configuration (DMTC) window. In such aspects, the UE may not use overlapping ROs or may determine a portion of the DMTC window that is not used for base station transmissions and declare the overlapping ROs with the unused portion valid.

公开(公告)号：US20210022006A1

公开(公告)日：2021-01-21

申请号：US16914794

申请日：2020-06-29

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Tanumay Datta ,  Kapil Bhattad ,  Ananta Narayanan Thyagarajan ,  Xiaoxia Zhang

IPC: H04W16/14 ,  H04W72/04 ,  H04L5/00 ,  H04L25/02 ,  H04W74/08 ,  H04L27/26 ,  H04W8/24 ,  H04L1/00

Abstract: A user equipment (UE) may employ an extended cyclic prefix, a postfix, or both for sounding reference signal (SRS) transmissions, such that gaps between SRS transmissions are long enough for UE antenna switching operations (e.g., based on antenna switching capabilities of the UE), but shorter in duration than any maximum channel vacancy time durations set by a wireless communications system. Further, UEs may transmit SRSs to base stations in accordance with an SRS configuration. For example, a base station may provide SRS configuration information to a UE that indicates, for example, information related to SRS scheduling, subband information, a cyclic prefix length, a cyclic postfix length, listen-before-talk (LBT) type information, an SRS trigger, an SRS cancellation procedure, or any combinations thereof. Based on such SRS configuration information, a UE may perform partial subband SRS techniques, subband selection techniques, SRS bandwidth adaptation techniques, LBT type configuration techniques, etc.

公开(公告)号：US20200267771A1

公开(公告)日：2020-08-20

申请号：US16742558

申请日：2020-01-14

Applicant: QUALCOMM Incorporated

Inventor： Pravjyot Singh Deogun ,  Jing Sun ,  Xiaoxia Zhang ,  Ozcan Ozturk ,  Kapil Bhattad ,  Ananta Narayanan Thyagarajan

IPC: H04W74/08 ,  H04W72/04 ,  H04B17/318

Abstract: Frequency division multiplex (FDM) random access configuration and selection is disclosed for new radio (NR) unlicensed (NR-U) operations. For idle mode user equipment (UEs), the network may configured multiple frequency bands for random access. The UE may then select different frequencies for random access when default frequencies experience interference. For connected mode UEs, the network may configured which of multiple configured frequency bands the connected UE may use for autonomous random access transmissions. The UE may then select any of the allowed frequency bands for autonomous random access. Contention-free random access resources may be configured on one or more of the multiple configured frequency bands. When contention-free resources are available, the UEs may initially attempt access of the contention-free resources on the default frequency band before attempting random access on other configured bands or the UE is provided a priority of bands for access by the network.

公开(公告)号：US20200260487A1

公开(公告)日：2020-08-13

申请号：US16783964

申请日：2020-02-06

Applicant: QUALCOMM INCORPORATED

Inventor： Kapil Bhattad ,  Jing Sun ,  Ananta Narayanan Thyagarajan ,  Xiaoxia Zhang ,  Tanumay Datta ,  Pravjyot Singh Deogun

IPC: H04W74/08 ,  H04W72/04 ,  H04W48/16 ,  H04L5/00 ,  H04W76/27 ,  H04W72/14

Abstract: Wireless communications systems and methods related to listen-before-talk (LBT) mode and/or transmission gap signaling for back-to-back grants and/or multi-transmission time interval (multi-TTI) grants are provided. In one embodiment, a first wireless communication device communicates, with a second wireless communication device, a scheduling grant indicating a gap period within a scheduled period. The first wireless communication device communicates, with the second wireless communication device during the scheduled period, a first communication signal including a silence period corresponding to the gap period. In one embodiment, a first wireless communication device communicates, with a second wireless communication device, a first scheduling grant indicating a first scheduled period and a second scheduling grant indicating a second scheduled period spaced apart from the first scheduled period. The first wireless communication device communicates, with the second wireless communication device based on an LBT mode determined based on the first scheduling grant and the second scheduling grant.

公开(公告)号：US20200259599A1

公开(公告)日：2020-08-13

申请号：US16786711

申请日：2020-02-10

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Ananta Narayanan Thyagarajan ,  Jing Sun ,  Kapil Bhattad

IPC: H04L1/18 ,  H04L5/00 ,  H04W72/12 ,  H04W74/08 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communications in a shared spectrum are described. A user equipment (UE) may transmit, via an autonomous uplink (AUL) communication, one or more transport blocks to a base station. Each transport block may include a plurality of code block groups (CBGs). The base station may provide CBG-level feedback to the UE based at least in part on the AUL communication. For example, a downlink feedback indication (DFI) bit sequence may be partitioned to include a first partition comprising AUL hybrid automatic repeat request (HARQ) feedback information and a second partition comprising contention window (CW) update information (e.g., for a subsequent AUL clear channel assessment). In some cases, the number of bits in the first partition may be based on a number of AUL HARQ processes of the UE and an AUL HARQ process granularity.

公开(公告)号：US20200170008A1

公开(公告)日：2020-05-28

申请号：US16696213

申请日：2019-11-26

Applicant: QUALCOMM INCORPORATED

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Ananta Narayanan Thyagarajan ,  Kapil Bhattad

IPC: H04W72/04 ,  H04L5/00 ,  H04W74/08

Abstract: Wireless communications systems and methods related to frequency resource mapping for uplink control channel communications and autonomous uplink communications in a frequency spectrum shared by multiple network operating entities are provided. A first wireless communication device identifies a first configuration from a plurality of configurations for mapping an uplink resource indicator to resources in a plurality of subbands. The first wireless communication device communicates with a second wireless communication device, a subband priority configuration. The first wireless communication device communicates, with the second wireless communication device, the uplink resource indicator. The first wireless communication device communicates, with the second wireless communication device, an uplink communication signal using a first resource of the resources based on the uplink resource indicator, the subband priority configuration, and the first configuration.