公开(公告)号：US20210282138A1

公开(公告)日：2021-09-09

申请号：US17313749

申请日：2021-05-06

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Seyedkianoush Hosseini ,  Peter Gaal ,  Srinivas Yerramalli ,  Hao Xu ,  Jing Sun ,  Shimman Arvind Patel ,  Aamod Kahandekar

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communication are described that provide for reduced timing between certain downlink communications and responsive uplink communications relative to certain legacy systems (e.g., legacy LTE systems). A user equipment (UE) or base station may be capable of operating using two or more timing configurations that each include an associated time period between receipt of a downlink communication (e.g., a grant of uplink resources or shared channel data) and a responsive uplink communication (e.g., an uplink transmission using the granted uplink resources or feedback of successful reception of the shared channel data). In cases where a UE or base station are capable of two or more timing configurations, a timing configuration for a transmission may be determined and the responsive uplink communication transmitted according to the determined timing configuration.

公开(公告)号：US11115852B2

公开(公告)日：2021-09-07

申请号：US16716082

申请日：2019-12-16

Applicant: QUALCOMM Incorporated

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

IPC: H04W24/10 ,  H04W72/04 ,  H04W4/70 ,  H04L5/00 ,  H04W16/14 ,  H04W48/16

Abstract: Various features related to eMTC-U deployment are described. In an aspect of the disclosure, an apparatus (e.g., a base station) maybe configured to select a subset of non-anchor channels from a set of available non-anchor channels, where the subset of non-anchor channels may correspond to a bandwidth within an unlicensed band. The apparatus maybe further configured to transmit information indicating the subset of non-anchor channels via an anchor channel. In some configurations, the subset of non-anchor channels maybe selected based on channel measurements performed by the base station or a UE. In one aspect, a UE may receive, from a base station via an anchor channel, information indicating a subset of non-anchor channels selected from a set of available non-anchor channels. The UE may transmit data on one or more non-anchor channel of the subset of non-anchor channels.

公开(公告)号：US11115170B2

公开(公告)日：2021-09-07

申请号：US16266878

申请日：2019-02-04

Applicant: QUALCOMM incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Peter Gaal ,  Ravi Teja Sukhavasi ,  Xiaoxia Zhang

IPC: H04L5/00 ,  H04W72/04 ,  H04L1/18 ,  H04W4/06 ,  H04W74/08 ,  H04W76/28 ,  H04L1/16

Abstract: Techniques and devices are described for wireless communication. A base station may determine a parameter associated with a transmission such as hybrid automatic repeat request (HARQ) feedback, a signal-to-noise ratio, or a determination regarding whether the transmission was successfully decoded. The base station may then determine a contention window adjustment value based on the parameter. The base station may then apply weighting factor (e.g., based on the time of the transmission, a number of devices being served, aspects of the transmission parameter, etc.) to the contention window adjustment value may adjust a contention window size for a second transmission based on the weighted contention window adjustment value (and, in some cases, other weighted adjustments based on other transmissions). The base station may then perform a clear channel assessment (CCA) based on the contention window size.

公开(公告)号：US11115110B2

公开(公告)日：2021-09-07

申请号：US16662766

申请日：2019-10-24

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhou ,  Tao Luo ,  Wooseok Nam ,  Makesh Pravin John Wilson ,  Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun ,  Arumugam Chendamarai Kannan

IPC: H04B7/08 ,  H04W74/08 ,  H04W72/04 ,  H04L5/00 ,  H04W72/12

Abstract: In order to overcome problems that a UE may face in determining a default beam for communication with the base station during a COT, a method, apparatus, and computer-readable medium are provided for a base station to indicate to the UE which CORESET(s), QCL assumptions, UL resources, and/or spatial relationships are selected for a COT. A UE receives, from a base station, an indication corresponding to a COT. The indication is for at least one of a set of CORESETs, a set of QCL assumptions, a set of UL resources, or a set of spatial relations for determining a default beam. The UE determines the default beam from the base station for use during the COT based on the indication. The UE transmits or receives a transmission using the default beam.

公开(公告)号：US11109285B2

公开(公告)日：2021-08-31

申请号：US16420075

申请日：2019-05-22

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tamer Kadous ,  Jing Sun

IPC: H04W36/00 ,  H04W36/30

Abstract: Aspects of the present disclosure provide a mechanism for improving reliability in a wireless communication network supporting a multi-cell transmission environment including a primary cell (PCell) and one or more secondary cells (SCells). In some examples, a user equipment (UE) in a connected mode with a PCell for multi-cell communication with the PCell and one or more SCells may utilize link quality measurements on both the PCell and one or more SCells to manage the connection with the PCell. In other examples, one or more SCells may function as a PCell to transmit common control signaling to the UE and/or receive uplink control information from the UE. In other examples, a UE in an idle mode may evaluate the reference signals transmitted from the PCell and one or more potential SCells before deciding whether to connect to the PCell for multi-cell communication.

公开(公告)号：US11102822B2

公开(公告)日：2021-08-24

申请号：US16684398

申请日：2019-11-14

Applicant: QUALCOMM INCORPORATED

Inventor： Kaushik Chakraborty ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Jing Sun

IPC: H04W72/04 ,  H04W74/08

Abstract: Wireless communications systems and methods related to communications in a network that supports data transmitted in an unlicensed frequency band and a licensed frequency band are provided. A first wireless communication device transmits in a first frequency band, a first system information signal indicating a first random access configuration for a second frequency band. The first wireless communication device transmits in a third frequency band, a second system information signal indicating a second random access configuration for the second frequency band. The first and third frequency bands are different frequency bands. Additionally, the first wireless communication device performs with a second wireless communication device, a random access procedure based on at least one of the first random access configuration or the second random access configuration.

公开(公告)号：US11102819B2

公开(公告)日：2021-08-24

申请号：US16228341

申请日：2018-12-20

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Rahul Malik ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W48/16 ,  H04W16/14 ,  H04L5/00 ,  H04W88/02 ,  H04W48/10 ,  H04B7/06

Abstract: A joint low-band and high-band operation is disclosed for use in new radio (NR) shared spectrum (NR-SS) networks. In such networks, uplink and downlink communications may occur over separate bands, selected based on performance or quality characteristics. A user equipment (UE) may search each of one or both of a low-band spectrum and a high-band spectrum for system information signal that includes both a low-band random access configuration and a high-band random access configuration. The UE transmits a random access request on one of the bands and receives the random access response from one or more cells on the other band. The UE continues the random access procedure, transmitting the uplink message based on the random access response on the first band to a selected cell. The UE would then receive the contention resolution message from the selected cell on the second band.

公开(公告)号：US11102763B2

公开(公告)日：2021-08-24

申请号：US16212402

申请日：2018-12-06

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communications are described for multiplexing of uplink channels in a shared radio frequency spectrum band. Techniques may provide for segmenting uplink resources into multiple different sets of uplink resources, each set of uplink resources having one or more associated uplink control channel resources. A base station or user equipment (UE) may select a set of uplink resources from the multiple sets of uplink resources for uplink transmissions from the UE based on a location of the uplink control channel resources of the set of uplink resources relative to other allocated uplink resources of the UE. Uplink control information (UCI) may be multiplexed with one or more uplink shared channel transmissions of a UE for transmission to a base station in certain circumstances.

公开(公告)号：US20210258953A1

公开(公告)日：2021-08-19

申请号：US17228698

申请日：2021-04-12

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Srinivas Yerramalli ,  Wanshi Chen ,  Jing Sun ,  Hao Xu ,  Shimman Arvind Patel

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26 ,  H04W72/12 ,  H04W24/10 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit uplink (UL) messages in unlicensed spectrum with a reduced UL timing delay. The UL timing delay may be reduced by using a shortened transmission time interval (TTI) (e.g., a TTI that is reduced in duration relative to other TTIs in the system or in a legacy system) or by reducing the number of TTIs between a grant and the corresponding UL message. The reduced UL timing delay may decrease the likelihood that the UE will wait for a subsequent transmit opportunity (TxOp) to transmit the UL message. In some cases, the reduced UL timing delay corresponds to a reduced hybrid automatic repeat request (HARQ) processing delay. In some cases, a time difference (e.g., measured in TTIs) between a measurement reference TTI a corresponding channel state information (CSI) report may also be reduced.

公开(公告)号：US20210250779A1

公开(公告)日：2021-08-12

申请号：US17302263

申请日：2021-04-28

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Zhifei Fan ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W16/26

Abstract: Wireless communications systems and methods related to on-demand cell coverage extension for broadcast signals are provided. A first wireless communication device communicates, with a second wireless communication device, a first extended cell coverage request. The first wireless communication device communicates, with the second wireless communication device, a first broadcast communication signal in an extended cell coverage mode in response to the first extended cell coverage request. The first broadcast communication signal includes a system information block repeated in at least one of a time domain or a frequency domain.