公开(公告)号：US20200021423A1

公开(公告)日：2020-01-16

申请号：US16507366

申请日：2019-07-10

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/14 ,  H04W72/04 ,  H04W74/08 ,  H04L27/26 ,  H04W4/06 ,  H04L5/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communications are described that provide for selecting a time division duplexing (TDD) frame structure for communicating with a user equipment (UE) via a shared radio frequency spectrum in which a listen before talk (LBT) procedure is performed prior to transmitting. A frame based equipment (FBE) frame starting location for FBE frames is determined where the FBE frame starting location is offset from a starting location of the TDD frame structure and spans successive TDD frames. In some cases, the TDD frame structure may be configured such that the UE does not need to perform an LBT procedure, and thus the LBT process may be transparent to the UE, allowing UEs that are not specially configured to operate using an LBT procedure to use the shared radio frequency spectrum.

公开(公告)号：US20190387418A1

公开(公告)日：2019-12-19

申请号：US16416450

申请日：2019-05-20

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Sayed Ali Akbar Fakoorian

IPC: H04W16/28 ,  H04W72/04 ,  H04L25/02 ,  H04L5/00 ,  H04W76/27 ,  H04W80/02 ,  H04L1/00

Abstract: Methods, systems, and devices for wireless communications are described that provide for configuring a user equipment (UE) with a number of uplink transmission configuration states that may be mapped to corresponding uplink transmission parameters. The uplink transmission parameters may be associated with one or more of a directional uplink transmission beam, a set of base stations that are to receive an uplink transmission for joint processing, uplink reference signal transmissions, or combinations thereof. An indication of a first uplink transmission configuration state may be provided to the UE, and the UE may transmit the uplink transmission based at least in part on a first set of uplink transmission parameters that are associated with the first uplink transmission configuration state.

公开(公告)号：US20190364579A1

公开(公告)日：2019-11-28

申请号：US16401979

申请日：2019-05-02

Applicant: Qualcomm Incorporated

Inventor： Xiaoxia Zhang ,  Andrei Dragos Radulescu ,  Srinivas Yerramalli ,  Yongbin Wei ,  Tamer Kadous ,  Jing Sun

IPC: H04W72/12 ,  H04W88/06 ,  H04B7/024 ,  H04L1/00 ,  H04L27/26 ,  H04W16/14 ,  H04B7/0413

Abstract: Wireless communications systems and methods related to serving user equipment devices (UEs) using multi-transmission/reception point (TRP) techniques with dynamic varying TRP clusters are provided. A wireless communication device receives, from a first group of one or more TRPs, a first signal during a first time period. The wireless communication device receives, from a second group of one or more TRPs, a second signal during a second time period, wherein at least one TRP in the second group is not in the first group. The first signal may include a first transport block (TB) and the second signal may include a second TB different from the first TB. Alternatively, the first signal may include a first portion of a TB and the second signal includes a second portion of the TB different from the first portion.

公开(公告)号：US10462812B2

公开(公告)日：2019-10-29

申请号：US15955471

申请日：2018-04-17

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Tao Luo ,  Srinivas Yerramalli ,  Peter Gaal ,  Hao Xu ,  Wanshi Chen

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

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. A base station transmits a provisional grant uplink assignment to a set of UEs. When a UE receives the provisional grant uplink assignment, the UE performs a clear channel assessment (CCA) operation on a secondary component carrier (SCC) based on the provisional grant UL assignment, the SCC being a contention-based carrier. Then, the UE transmits a schedule request (SR) on the SCC when the CCA operation succeeds. The base station transmits grant confirmation(s) on the SCC in response to the detected SR(s). Once the UE receives a grant confirmation on the SCC in response to the SR, the UE transmits data on the SCC.

公开(公告)号：US20190313419A1

公开(公告)日：2019-10-10

申请号：US16373047

申请日：2019-04-02

Applicant: QUALCOMM Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Jing Sun ,  Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W72/08 ,  H04B1/713 ,  H04W72/04 ,  H04L1/00 ,  H04W28/02 ,  H04L1/18 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. In systems supporting multiple communication protocol types (e.g., ultra-reliable low-latency communication and enhance mobile broadband communication), a user equipment may implement multiplexing rules for handling overlapping transmissions of different communication protocols. For example, if lower latency data supports multiplexing with higher latency data and a lower latency resource overlaps (either partially or completely) with a higher latency resource, a number of options can be taken to control multiplexing. Similarly, if low latency uplink control information supports multiplexing with a slot-based physical uplink shared channel, and the physical uplink shared channel has its own uplink control information, a number of options can be taken to control multiplexing. If slot-based uplink control information overlaps (either partially or completely) with low latency data, then, likewise, a number of options can be taken to control multiplexing. Controlling multiplexing may support meeting low latency thresholds.

公开(公告)号：US20190297620A1

公开(公告)日：2019-09-26

申请号：US16359247

申请日：2019-03-20

Applicant: QUALCOMM Incorporated

Inventor： Qingjiang Tian ,  Xiaoxia Zhang ,  Jing Sun ,  Srinivas Yerramalli

IPC: H04W72/04 ,  H04L5/00 ,  H04W74/08 ,  H04L1/18 ,  H04W74/00

Abstract: Wireless communications systems and methods related to communicating uplink control information (UCI) in a network operating over multiple aggregated unlicensed carriers are provided. A first wireless communication device communicates, with a second wireless communication device, a downlink communication signal. The first wireless communication device communicates, with the second wireless communication device, an unscheduled uplink communication signal including an uplink report associated with the downlink communication signal, the unscheduled uplink communication signal communicated based on a listen-before-talk (LBT) procedure. The uplink report includes at least one of an acknowledgement (ACK) for data in the downlink communication signal, a negative-acknowledgement (NACK) for the data in the downlink communication signal, or channel information based at least on the downlink communication signal.

公开(公告)号：US10405228B2

公开(公告)日：2019-09-03

申请号：US15892183

申请日：2018-02-08

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Andrei Dragos Radulescu ,  Tamer Kadous

IPC: H04W28/02 ,  H04W72/04 ,  H04W24/02 ,  H04W48/16 ,  H04L5/00 ,  H04W48/12

Abstract: Configurations of system information blocks providing cell access information supporting wideband coverage enhancement in wireless communication networks are disclosed. Embodiments encode and transmit information elements for both a legacy system information block and a wideband coverage enhancement system information block in a multiple subframe discovery reference signal configuration. For example, embodiments may utilize a two subframe CR-DRS configuration in which a WCE SIB-MF1 message payload is encoded and transmitted independently with respect to a legacy SIB-MF1 message payload. Additionally, or alternatively, embodiment may utilize a two subframe CR-DRS configuration in which both a legacy SIB-MF1 message payload and a WCE SIB-MF1 message payload share the same DRS subframe payload by jointly encoding the legacy SIB-MF1 and WCE SIB-MF1 messages.

公开(公告)号：US20190261382A1

公开(公告)日：2019-08-22

申请号：US16276101

申请日：2019-02-14

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W72/10 ,  H04W72/04

Abstract: Indication of transmission priority class is disclosed for sharing a base station's maximum channel occupancy time (MCOT) for use in autonomous uplink (AUL). Aspects of the disclosure provide for implicitly sharing the MCOT by providing an indication of transmission opportunity (TxOP) length. A serving base station sends an indication of a current TxOP length in control signals to a user equipment (UE). The UE may then infer a set of potential transmission priorities used by the serving base station according to the TxOP length, as TxOP length may relate to the MCOT, which itself may be associated with a particular transmission priority class. The UE may then, conservatively, select the highest transmission priority of the set of potential transmission priorities for autonomously transmitting any uplink data having at least the selected highest transmission priority within configured AUL resource of the current TxOP.

公开(公告)号：US20190239224A1

公开(公告)日：2019-08-01

申请号：US16382968

申请日：2019-04-12

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Juan Montojo ,  Tao Luo ,  Wanshi Chen

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W72/12 ,  H04W72/14 ,  H04W28/02 ,  H04W74/08 ,  H04W74/00 ,  H04W68/00 ,  H04L1/00 ,  H04W16/14 ,  H04W52/02 ,  H04W52/14 ,  H04W52/36 ,  H04W56/00

CPC classification number: H04W72/0446 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0013 ,  H04L1/004 ,  H04L1/18 ,  H04L1/1825 ,  H04L1/1861 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0055 ,  H04Q2213/13215 ,  H04W16/14 ,  H04W28/0278 ,  H04W52/0216 ,  H04W52/146 ,  H04W52/367 ,  H04W56/0005 ,  H04W68/005 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/1226 ,  H04W72/1268 ,  H04W72/1284 ,  H04W72/1289 ,  H04W72/14 ,  H04W74/006 ,  H04W74/085 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/1242 ,  Y02D70/126 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

Abstract: Techniques are described for wireless communication. One method includes detecting a first reference signal received from a user equipment (UE) in a reference scheduled transmission burst including a plurality of contiguous transmission time intervals (TTIs) received over a shared radio frequency spectrum band; identifying a reference TTI in which the first reference signal is received; determining a contention window size usable by the UE to contend for access to the shared radio frequency spectrum band; and transmitting an indication of the determined contention window size to the UE.

公开(公告)号：US20190238177A1

公开(公告)日：2019-08-01

申请号：US16255645

申请日：2019-01-23

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/713 ,  H04B7/26 ,  H04W72/04

CPC classification number: H04B1/713 ,  H04B7/2643 ,  H04W72/044

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a discovery reference signal from a base station on an anchor channel. The UE may perform a first random or pseudorandom frequency hopping procedure to identify a plurality of downlink carriers for a first time period. The UE may perform a second random or pseudorandom frequency hopping procedure within the plurality of downlink carriers to select one of the plurality of downlink carriers as the uplink channel for a second time period. The UE may then transmit an uplink communication during the second time period on the selected uplink channel. In some examples, the uplink communication may be transmitted based at least in part on time division multiplexing (TDM) information.