公开(公告)号：US11284424B2

公开(公告)日：2022-03-22

申请号：US16803912

申请日：2020-02-27

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Chirag Patel ,  Tao Luo ,  Tamer Kadous

IPC: H04W72/12 ,  H04L5/00 ,  H04L1/18 ,  H04W72/14

Abstract: Methods, systems, and devices for wireless communication are described. The payload size for uplink transmissions of unscheduled control information may vary and, in some cases, may be dynamically determined. A user equipment (UE) may determine a payload size or may select a payload size from a set of predetermined sizes. A base station may independently determine the same payload size or it may blindly detect the payload size upon receiving the uplink (UL) transmission. Or the base station may indicate the payload size to the UE. Additionally, UL grants issued to the UE may take one of several forms (e.g., different downlink control indicator formats), and characteristics of the grant may indicate information about resources assigned by the grant, including a location of the resources among various transmission opportunities or whether the grant is for multiple subframes.

公开(公告)号：US10681723B2

公开(公告)日：2020-06-09

申请号：US15695167

申请日：2017-09-05

Applicant: QUALCOMM Incorporated

Inventor： Andrei Dragos Radulescu ,  Chirag Patel ,  Arumugam Chendamarai Kannan ,  Tamer Kadous ,  Tao Luo ,  Jing Sun

IPC: H04W72/14 ,  H04B7/06 ,  H04L1/18 ,  H04B7/0408 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus for wireless communication are provided. The apparatus may be a base station. The apparatus may transmit an uplink grant to a UE during a first transmit opportunity. The apparatus may signal, during a second transmit opportunity, a grant trigger to the UE to trigger operations associated with the uplink grant that are uncompleted after the first transmit opportunity. The grant trigger may be associated with a set of UEs that includes the UE. The set of UEs may be a subset of the UEs having pending transmissions. The apparatus may instruct the UE regarding whether to keep or discard resources granted by the uplink grant when the UE switches to a different beam during or prior to the second transmit opportunity.

公开(公告)号：US10548131B2

公开(公告)日：2020-01-28

申请号：US15635051

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 ,  H04W4/70 ,  H04L29/08 ,  H04W28/26 ,  H04L5/00 ,  H04W88/02 ,  H04W88/08

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 performs an LBT procedure at a beginning of frames and transmits a plurality of repetitions of a transmission. When the plurality of repetitions span multiple frames and the LBT procedure is not successful for a first frame, the base station drops or postpones at least one repetition in the first frame until a second frame when the LBT procedure is successful. A UE receives the plurality of repetitions and may combine a plurality of repetitions across multiple frames. The UE may determine whether the base station drops the at least one repetition in the first frame or postpones the at least one repetition in the first frame until a second frame.

公开(公告)号：US10547494B2

公开(公告)日：2020-01-28

申请号：US15697212

申请日：2017-09-06

Applicant: QUALCOMM Incorporated

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

IPC: H04L29/08

Abstract: This disclosure includes methods, systems, and devices for wireless communication. A repetition of symbols may be used to increase a device's ability to synchronize and communicate using unlicensed spectrum. For example, a base station may schedule a frame that includes repetitions, in time or frequency, of a control or data signal. After performing a listen-before-talk (LBT) procedure, the base station may broadcast or transmit the frame to one or more devices, such as a user equipment (UE). For instance, the frame may include repetitions of a discovery reference signal (DRS), and be broadcast by the base station to enable synchronization by the UE. In other examples, the signal may include repetitions of a cell-specific reference signal (CRS), and a UE may identify a start of a transmission opportunity using the CRSs. Other signals, such as downlink control and shared channels, may be repeated within a frame in a similar manner.

公开(公告)号：US10542543B2

公开(公告)日：2020-01-21

申请号：US15635018

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 ,  H04W4/70 ,  H04L29/08 ,  H04W28/26 ,  H04L5/00 ,  H04W88/02 ,  H04W88/08

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 user equipment apparatus segments an uplink duration in each frame into multiple transmission units for each frequency, wherein a frame comprises an integer number of the transmission units. The apparatus transmits uplink communication based on the multiple transmission units, wherein each transmission unit comprises at least one on period and at least one off period corresponding to each of a plurality of frequencies, wherein during an on period the UE transmits uplink communication on the corresponding frequency and during an off period the UE refrains from transmitting uplink communication on the corresponding frequency. Each transmission unit may comprise multiple on periods and multiple off periods. The on/off periods may be configured by a base station or specified for each frame type.

公开(公告)号：US10461797B2

公开(公告)日：2019-10-29

申请号：US16242969

申请日：2019-01-08

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

IPC: H04B1/00 ,  H04B1/403 ,  H04B1/26 ,  H04B1/707 ,  H04B7/24 ,  H04B7/26 ,  H04L5/00 ,  H04L27/00 ,  H04W16/14 ,  H04W72/04

Abstract: Methods, systems, and devices for wireless communication are described. Resources for narrowband communication in an unlicensed radio frequency spectrum band may be configured and allocated based on resource availability, regulatory constraints, and device capability or category. A narrowband wireless device, such as a machine type communication device or other relatively low complexity device, may communicate using one or more narrowband carriers, which may occupy between one tone and multiple resource blocks in an unlicensed spectrum band (e.g., any number of resources between one (1) tone and multiple resource blocks (RBs)). Different device types may thus be configured differently as they move between geographic regions. The base station may then communicate with the narrowband mobile device based on the resource allocation and the carrier configuration.

公开(公告)号：US10349404B2

公开(公告)日：2019-07-09

申请号：US15493099

申请日：2017-04-20

Applicant: QUALCOMM Incorporated

Inventor： Arumugam Chendamarai Kannan ,  Andrei Dragos Radulescu ,  Chirag Patel ,  Tao Luo ,  Tamer Kadous

IPC: H04W4/00 ,  H04W72/04 ,  H04W72/10 ,  H04W48/16 ,  H04L5/00 ,  H04W16/14 ,  H04W68/00

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor for discovery reference signal (DRS) transmissions, physical downlink shared channel (PDSCH) transmissions, or combinations thereof within a DRS transmission window. The UE may attempt to decode DRS or PDSCH transmissions for a subframe based on detection of DRS transmissions, prioritization of DRS transmissions relative to PDSCH transmissions, locations of subframes within a radio frame, overlapping of the DRS transmission window with a paging opportunity, or any combination thereof. In some cases, one or more radio link monitoring (RLM) parameters may be adjusted based on decoding of PDSCH or DRS transmissions.

公开(公告)号：US10142980B2

公开(公告)日：2018-11-27

申请号：US15441215

申请日：2017-02-23

Applicant: QUALCOMM Incorporated

Inventor： Andrei Radulescu ,  Chirag Patel ,  Tao Luo ,  Arumugam Chendamarai Kannan

IPC: H04L12/24 ,  H04W72/04 ,  H04B17/318 ,  H04L5/00 ,  H04W24/08 ,  H04W24/10 ,  H04W72/12 ,  H04W72/08 ,  H04W74/08 ,  H04J11/00 ,  H04W48/00 ,  H04W48/16 ,  H04W52/02 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may monitor a neighbor cell and report the result to a serving base station. Based on the report, the serving base station may identify an estimated discovery reference signal (DRS) transmission window of the neighbor cell. In some cases, the UE may estimate and report parameters of the neighbor DRS transmission window, and in other cases, the UE may make a measurement report and the base station may infer DRS transmission window parameters. The base station may then provide the UE with a DRS measurement timing configuration (DMTC) based on the estimated parameters of the neighbor cell so that the UE may monitor the neighbor cell and the serving cell in an efficient manner. For example, the UE may conserve battery life by refraining from monitoring DRS during periods when a DRS transmission is not likely.

公开(公告)号：US10034269B2

公开(公告)日：2018-07-24

申请号：US15489599

申请日：2017-04-17

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Juan Montojo ,  Taesang Yoo ,  Siddhartha Mallik ,  Andrei Radulescu ,  Chirag Patel ,  Chengjin Zhang

IPC: H04W68/02 ,  H04W76/28 ,  H04W16/14 ,  H04W88/02 ,  H04W88/08 ,  H04W72/00 ,  H04W72/04 ,  H04W68/00 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

公开(公告)号：US20170332409A1

公开(公告)日：2017-11-16

申请号：US15586840

申请日：2017-05-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Chirag Patel ,  Arumugam Chendamarai Kannan ,  Juan Montojo ,  Yongbin Wei

IPC: H04W74/08 ,  H04L5/00

CPC classification number: H04W74/0833 ,  H04L1/00 ,  H04L1/08 ,  H04L5/00 ,  H04L5/0041 ,  H04W16/14 ,  H04W74/0866

Abstract: Techniques are described for wireless communication. One method includes transmitting a sequence of deterministic variations of random access data on at least one interlace of non-contiguous frequency resources allocated to a physical random access channel (PRACH) in an unlicensed spectrum, beginning at a first time; repeating the transmitting of the sequence of deterministic variations of random access data at least once, beginning at a second time; generating at least one modification of the sequence of deterministic variations of random access data, in which the at least one modification is generated according to a modification sequence; and transmitting on the at least one interlace, beginning at a third time, the at least one modification of the sequence of deterministic variations of random access data.