公开(公告)号：US20190306878A1

公开(公告)日：2019-10-03

申请号：US16281828

申请日：2019-02-21

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Zhifei Fan ,  Kapil Bhattad ,  Jing Sun ,  Tamer Kadous ,  Srinivas Yerramalli

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

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) and a base station may communicate in an unlicensed spectrum (e.g., a shared radio frequency spectrum band). As such, the UE may determine a codebook size for transmitting hybrid access request (HARQ) acknowledgement (ACK) feedback with respect to the unlicensed spectrum. Accordingly, the UE may base the HARQ ACK codebook size on a number of HARQ processes with which the UE has been configured. Additionally or alternatively, the UE may base the HARQ ACK codebook size on a number and/or duration of downlink channel monitoring occasions indicated by the base station. In some cases, the UE may base the HARQ ACK codebook size on a combination of the techniques described herein.

公开(公告)号：US10411795B2

公开(公告)日：2019-09-10

申请号：US15919127

申请日：2018-03-12

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/00 ,  H04B7/26 ,  H01Q1/24 ,  H04B7/0491 ,  H04W72/08 ,  H04W16/24 ,  H04W8/00 ,  H04W16/14 ,  H04W36/06 ,  H04W48/18 ,  H04W4/70 ,  H04B7/06 ,  H04W36/30 ,  H04W88/04 ,  H04W74/08

Abstract: Described techniques provide for switching a user equipment (UE) between different coverage enhancement (CE) modes, such as between a non-CE mode and a CE mode. A UE may determine that a CE mode switch is to be performed and may initiate the mode switching. The UE may compare signal qualities of signals from one or more base stations against one or more threshold values and determine that a switch from a CE mode to a non-CE mode, or from a non-CE to CE mode, is to be performed. In some cases, a UE may be in idle mode and switch between CE modes, or may perform a cell reselection to a different base station. In other cases, a UE may be in connected mode and may declare a radio link failure to initiate a mode switch. A base station may initiate mode switching based on radio link monitoring of UEs.

公开(公告)号：US20190274162A1

公开(公告)日：2019-09-05

申请号：US16287893

申请日：2019-02-27

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Tamer Kadous ,  Kapil Bhattad ,  Jing Sun

IPC: H04W74/08 ,  H04W72/04

Abstract: Wireless communications systems and methods related to communicating in a frequency band based on bandwidth parts are provided. A first wireless communication device communicates with a second wireless communication device, a first configuration indicating a plurality of bandwidth parts in a frequency band, the plurality of bandwidth parts based on an expected channel access pattern associated with a listen-before-talk (LBT) in the frequency band. The first wireless communication device communicates, with the second wireless communication device, a first communication signal in a first bandwidth part of the plurality of bandwidth parts based on an LBT result.

公开(公告)号：US20190268933A1

公开(公告)日：2019-08-29

申请号：US16281429

申请日：2019-02-21

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/14 ,  H04L5/14 ,  H04W72/12 ,  H04L5/00 ,  H04W72/04

Abstract: Over-the-air (OTA) dynamic time division duplex (TDD) is disclosed with a channel use indicator (CUI) receiver (CUI-R) signal multiplexed in uplink transmissions. According to various aspects, a user equipment (UE) may receive a downlink grant from a serving base station, in which the downlink grant identifies downlink transmissions in one or more subsequent communication slots. The UE may identify a trigger for transmission of a channel usage signal associated with the grant that may be received by neighboring UEs that may potentially interfere. The UE transmits the channel usage signal in a next scheduled uplink region and then receives downlink data from the serving base station according to the downlink grant. If the neighboring UE receives a conditional uplink grant, then it may proceed with uplink transmissions when it fails to detect the channel usage signal from the UE.

公开(公告)号：US20190229788A1

公开(公告)日：2019-07-25

申请号：US16241747

申请日：2019-01-07

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Kapil Bhattad ,  Jing Sun ,  Qingjiang Tian ,  Srinivas Yerramalli ,  Tamer Kadous ,  Yongbin Wei ,  Aleksandar Damnjanovic

IPC: H04B7/0456 ,  H04B7/06 ,  H04L1/00 ,  H04L1/16 ,  H04W74/08 ,  H04L5/00

Abstract: Wireless communications systems and methods related to performing adaptive autonomous uplink (UL) communications are provided. A first wireless communication device receives, from a second wireless communication device, an autonomous uplink transmission configuration. The first wireless communication device determines a transmission parameter in response to a link adaptation parameter based on the autonomous uplink transmission configuration. The first wireless communication device transmits, to the second wireless communication device, an autonomous uplink communication signal based on the determined transmission parameter.

公开(公告)号：US10327241B2

公开(公告)日：2019-06-18

申请号：US15464998

申请日：2017-03-21

Applicant: QUALCOMM Incorporated

Inventor： Tamer Kadous

IPC: H04W72/04 ,  H04B7/0408 ,  H04L1/00 ,  H04W72/12 ,  H04W74/00 ,  H04B7/06 ,  H04W74/08

Abstract: Wireless communications systems and methods related to solving deafness problems in directional clear channel assessment (CCA) procedures. A first wireless communication device transmits, to a second wireless communication device in a first beam direction, a first channel reservation for receiving a data burst. The first wireless communication device receives, from the second wireless communication device, a first portion of the data burst. The first wireless communication device transmits, in the first beam direction, a second channel reservation for receiving one or more remaining portions of the data burst. The first wireless communication device receives, from the second wireless communication device, a second portion of the data burst. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20190182845A1

公开(公告)日：2019-06-13

申请号：US16190927

申请日：2018-11-14

Applicant: QUALCOMM Incorporated

Inventor： Yisheng Xue ,  Xiaoxia Zhang ,  Aleksandar Damnjanovic ,  Weiliang Zeng ,  Tamer Kadous ,  Yongbin Wei

IPC: H04W72/08 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communications are described. A transmitter may identify a contention window for a no-energy-detection protocol for determining a channel availability for a data transmission. After the contention window expires, the transmitter may send a request message to a receiver. The receiver may measure a quality of the request message against a request threshold and transmit a response message if the measured quality exceeds the request threshold. The transmitter may then measure a quality of the response message against a response threshold. If the measured quality exceeds the response threshold, the transmitter may initiate a data transmission with the receiver. If the quality falls below the response threshold or the response message is not received, the transmitter may adjust the contention window and reattempt the no-energy-detection protocol. The contention window may also be adjusted based on an acknowledgement message received after the data transmission.

公开(公告)号：US20190166621A1

公开(公告)日：2019-05-30

申请号：US16170438

申请日：2018-10-25

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Farhad Meshkati ,  Tamer Kadous

IPC: H04W74/00 ,  H04W16/14

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a semi-persistent scheduling (SPS) configuration message from a base station, the SPS configuration message containing at least one SPS parameter for downlink SPS communications over a shared radio frequency spectrum band. The UE may identify, based on the SPS configuration, one or more subframes or slots allocated for the downlink SPS communications. The UE may perform the downlink SPS communications during the one or more subframes or slots and according to the SPS configuration.

公开(公告)号：US10298289B2

公开(公告)日：2019-05-21

申请号：US15854380

申请日：2017-12-26

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/7143 ,  H04W8/00 ,  H04L5/00 ,  H04W16/14 ,  H04L27/00 ,  H04J3/00 ,  H04W16/10 ,  H04W48/12

Abstract: Methods, systems, and devices for wireless communication are described that provide for a base station to use frequency hopping for cell acquisition according to a frequency hopping pattern. The frequency hopping pattern may include a set of anchor channels and a set of non-anchor channels used by a base station to communicate with wireless devices. The base station may occupy an anchor channel more often than a non-anchor channel and may transmit acquisition signals using the anchor channel. The anchor channel may also be used by the base station and a user equipment (UE) to exchange paging information, positioning information, random access resources, location of other channels, etc.

公开(公告)号：US20190150198A1

公开(公告)日：2019-05-16

申请号：US16183367

申请日：2018-11-07

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Taesang Yoo ,  Tamer Kadous ,  Yongbin Wei ,  Aleksandar Damnjanovic

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

Abstract: New radio (NR) transmission opportunity (TxOP) structure having flexible starting points are disclosed for wireless communications. When a typical listen before talk (LBT) procedure is performed, the transmitting node will not know ahead of time when the LBT will pass and, thus, when data transmissions can start. NR systems may include a mini-slot design for accommodating transmission units smaller than a slot. Aspects of the present disclosure provide for flexibly increasing the number of potential starting transmission boundaries depending on when the LBT pass is detected. Alternative aspects of the present disclosure determine the potential starting transmission points using a mini-slot based design, a floating slot based design, or a punctured slot based design with a code block group (CBG) level retransmission mechanism.