公开(公告)号：US11218206B2

公开(公告)日：2022-01-04

申请号：US16513010

申请日：2019-07-16

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun ,  Seyed Ali Akbar Fakoorian ,  Chih-Hao Liu

IPC: H04B17/309 ,  H04B7/06 ,  H04W52/18 ,  H04B7/0456 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communications are described. In some cases, a wireless device such as a user equipment (UE) may receive a downlink transmission from a base station over a wireless channel, select, based on the received downlink transmission, a channel state information (CSI) computation mode for the wireless channel, where the CSI computation mode is based on an effective isotropic radiated power (EIRP) constraint, measure a set of one or more CSI reference signals (CSI-RSs) from the base station to obtain a CSI measurement, and transmit a CSI report to the base station based on the selected CSI computation mode and the CSI measurement.

公开(公告)号：US20210368542A1

公开(公告)日：2021-11-25

申请号：US17301652

申请日：2021-04-09

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to sidelink communications in an unlicensed frequency band are provided. A user equipment (UE) receives, from a base station (BS), a first downlink control information (DCI) associated with a first listen-before-talk (LBT) time. The UE determines a first sidelink transmission opportunity for communicating in an unlicensed frequency band at the first LBT time based on the first DCI.

公开(公告)号：US20210297985A1

公开(公告)日：2021-09-23

申请号：US17249173

申请日：2021-02-22

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W68/02 ,  H04W72/04 ,  H04B1/713

Abstract: Wireless communications systems and methods related to performing paging operations in a shared radio frequency band (e.g., in a shared spectrum or an unlicensed spectrum) with an improved paging reliability. A first user equipment (UE) determines a frequency hopping pattern for a paging occasion window (POW) in a plurality of frequency subbands within a shared radio frequency band. The first UE monitors for a paging message from a base station (BS) in the POW, where the monitoring includes hopping from at least a first frequency subband of the plurality of frequency subbands to a second frequency subband of the plurality of frequency subbands based on the frequency hopping pattern.

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：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：US11089575B2

公开(公告)日：2021-08-10

申请号：US16380778

申请日：2019-04-10

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Aleksandar Damnjanovic ,  Xiaoxia Zhang ,  Tamer Kadous ,  Chih-Hao Liu ,  Seyed Ali Akbar Fakoorian ,  Andrei Dragos Radulescu

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00

Abstract: In various aspects, a base station and user equipment (UE) exchange an indication of UE capabilities and a monitoring schedule for the UE to monitor an integer M frequency band partitions for a predetermined signal. The base station performs one or more successful clear carrier assessments (CCAs) on an integer N frequency band partitions of the M frequency band partitions, wherein N

公开(公告)号：US20210195649A1

公开(公告)日：2021-06-24

申请号：US17090393

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 ,  H04W72/04

Abstract: Wireless communications systems and methods related to autonomous sidelink communication in a radio frequency band (e.g., in a shared spectrum or an unlicensed spectrum) shared by multiple network operating entities are provided. A first user equipment (UE) performs a listen-before-talk (LBT) in a shared radio frequency band based on a first starting point of a plurality of starting points within an LBT gap duration. The first UE transmits, to a second UE, a first sidelink communication in the shared radio frequency band based on the LBT, the first sidelink communication including first sidelink control information (SCI) and first sidelink data.

公开(公告)号：US10992427B2

公开(公告)日：2021-04-27

申请号：US16259992

申请日：2019-01-28

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04W52/02 ,  H04W52/14 ,  H04W52/44 ,  H04W52/32

Abstract: Methods, systems, and devices for wireless communications are described. A base station may identify a plurality of downlink carriers for a transmission time interval (TTI), e.g., a subframe. The base station may identify a period of inactivity for one or more of the plurality of downlink carriers during the TTI, which may correspond to one or more orthogonal frequency division multiplexing (OFDM) symbols of the subframe. The base station may transmit narrowband reference signals (NB-RSs) over the one or more carriers during the period of inactivity according to a channel reservation narrowband reference signal (NB-RS) pattern. The channel reservation NB-RS pattern may include a first set of time-frequency resources associated with a baseline NB-RS pattern and a second set of supplemental time-frequency resources associated with a period of inactivity.

公开(公告)号：US10945152B2

公开(公告)日：2021-03-09

申请号：US16276079

申请日：2019-02-14

Applicant: QUALCOMM Incorporated

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

IPC: H04W28/02 ,  H04L12/807 ,  H04W72/04 ,  H04W72/12 ,  H04W16/14 ,  H04W74/00 ,  H04L5/00 ,  H04W74/08

Abstract: Base station contention window update procedures with autonomous uplink (AUL) in a transmission opportunity (TxOP) is discussed. After acquiring a channel and scheduling the TxOP, a base station may transmit control signals to manage communications with served user equipments (UEs). Management of AUL communications in addition to update of the contention window may be determined based on whether the base station has either or both downlink data and scheduled uplink (SUL) transmissions scheduled for the TxOP. Where both downlink and SUL are scheduled, AUL transmissions are allowed, but update of the contention window uses feedback based on the downlink transmissions. Where SUL are scheduled, but no downlink data, AUL are allowed and the contention window is updated using performance information on the uplink transmissions. Finally, where neither data nor SUL are scheduled, the base station deactivate any AUL resources for the TxOP and will refrain from updating the contention window.

公开(公告)号：US10917918B2

公开(公告)日：2021-02-09

申请号：US16103434

申请日：2018-08-14

Applicant: QUALCOMM incorporated

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

IPC: H04W74/08 ,  H04L1/18 ,  H04L1/00 ,  H04W4/70 ,  H04W76/27 ,  H04L5/00 ,  H04W72/04 ,  H04W4/02 ,  H04L5/14

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for receiving ACK/NACK reporting in unlicensed IoT systems with long transmission durations. In one example, an eNodeB executes an LBT protocol to gain access to a channel of a shared spectrum, receives radio resource management (RRM) measurement reports from an IoT-U, estimates a number of repetitions used to schedule the IoT-U based on the RRM measurement, and configures the maximum number of HARQ processes that can be scheduled in a frame based on the RRM measurements and the estimate of the repetitions.