公开(公告)号：US10833760B2

公开(公告)日：2020-11-10

申请号：US16531538

申请日：2019-08-05

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 ,  H04W4/70 ,  H04W36/30 ,  H04B7/06 ,  H04W36/06 ,  H04W48/18 ,  H04W88/04 ,  H04W74/08 ,  H04W88/06

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：US20200351824A1

公开(公告)日：2020-11-05

申请号：US16930887

申请日：2020-07-16

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tao Luo

IPC: H04W72/00 ,  H04W16/14 ,  H04L5/00 ,  H04W74/08 ,  H04W74/00 ,  H04W4/06 ,  H04L12/801 ,  H04L12/28

Abstract: Techniques are described for wireless communications. One method includes determining a contention window size for a first broadcast transmission or a first multicast transmission on at least one channel of a shared radio frequency spectrum band, where the first broadcast transmission or the first multicast transmission is targeted for a first plurality of UEs, and contending for access to the at least one channel of the shared radio frequency spectrum band for the first broadcast transmission or the first multicast transmission based at least in part on the determined contention window size. In some cases, the first broadcast transmission or the first multicast transmission may be an example of a multipoint transmission, which may include a coordinated multipoint transmission.

公开(公告)号：US10785751B2

公开(公告)日：2020-09-22

申请号：US15244662

申请日：2016-08-23

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Srinivas Yerramalli ,  Tao Luo

IPC: H04L5/00 ,  H04W72/00 ,  H04W16/14 ,  H04W74/08 ,  H04W74/00 ,  H04W4/06 ,  H04L12/801 ,  H04L12/28 ,  H04W74/04 ,  H04L12/403

Abstract: Techniques are described for wireless communications. One method includes determining a contention window size for a first broadcast transmission or a first multicast transmission on at least one channel of a shared radio frequency spectrum band, where the first broadcast transmission or the first multicast transmission is targeted for a first plurality of UEs, and contending for access to the at least one channel of the shared radio frequency spectrum band for the first broadcast transmission or the first multicast transmission based at least in part on the determined contention window size. In some cases, the first broadcast transmission or the first multicast transmission may be an example of a multipoint transmission, which may include a coordinated multipoint transmission.

公开(公告)号：US10764920B2

公开(公告)日：2020-09-01

申请号：US16170438

申请日：2018-10-25

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Farhad Meshkati ,  Tamer Kadous

IPC: H04W72/04 ,  H04W72/12 ,  H04W74/00 ,  H04L5/00 ,  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：US10764913B2

公开(公告)日：2020-09-01

申请号：US15467379

申请日：2017-03-23

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Aleksandar Damnjanovic ,  Peter Gaal ,  Juan Montojo

IPC: H04W72/12 ,  H04W74/08 ,  H04W76/27 ,  H04W16/14 ,  H04W28/02 ,  H04W72/10 ,  H04W72/14 ,  H04W88/02

Abstract: Techniques are described for wireless communication. One method for wireless communication at a user equipment (UE) includes receiving, over the air, information indicative of at least one type of LBT procedure to perform for an uplink transmission; identifying, from the received information, the at least one type of LBT procedure to perform for the uplink transmission; and performing, for a shared spectrum, the at least one type of LBT procedure for the uplink transmission. One method for wireless communication at a network access device includes scheduling an uplink transmission of a UE in a shared spectrum, and transmitting, over the air, information indicative of at least one type of LBT procedure to perform for the uplink transmission.

公开(公告)号：US20200252977A1

公开(公告)日：2020-08-06

申请号：US16854271

申请日：2020-04-21

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Srinivas Yerramalli ,  Jing Sun ,  Aleksandar Damnjanovic ,  Ozcan Ozturk ,  Tao Luo ,  Yongbin Wei

IPC: H04W74/08 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may identify that the UE is configured to use a two-step random access channel (RACH) procedure. The two-step RACH procedure may include an uplink request message and a downlink response. The UE may transmit the uplink request message as part of the two-step RACH procedure, and the uplink request message may include a preamble portion that is one of a set of predefined sequences and a payload portion that includes a physical uplink shared channel waveform. The UE may receive the downlink response as part of the two-step RACH procedure and in response to the uplink request message.

公开(公告)号：US10728913B2

公开(公告)日：2020-07-28

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 ,  H04B7/0413 ,  H04L27/26 ,  H04W16/14 ,  H04L1/00

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：US10727986B2

公开(公告)日：2020-07-28

申请号：US16181141

申请日：2018-11-05

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Jing Sun

IPC: H04L1/18 ,  H04L1/16 ,  H04L5/00 ,  H04W72/14 ,  H04L1/12

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a transport block (TB) of data from a network, decode the TB of data, transmit to the network a first acknowledgement based on a result of the decoding, receive a signal from the network that includes an acknowledgement retransmission request and a TB indication that indicates a TB of data to which the acknowledgement retransmission request relates, determine a second acknowledgement based on the acknowledgement retransmission request and the TB indication, and transmit the second acknowledgement to the network.

公开(公告)号：US10687362B2

公开(公告)日：2020-06-16

申请号：US16676308

申请日：2019-11-06

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Xiaoxia Zhang ,  Ozcan Ozturk ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W28/06 ,  H04W72/04 ,  H04W72/12 ,  H04W74/00 ,  H04W76/27

Abstract: Enhancements to slot format indicator (SFI) for new radio (NR) unlicensed (NR-U) operations is disclosed. The SFI may be transmitted separately from a channel occupancy time (COT) range indication. The COT range indication identifies parameters of a three-segment structure of a current COT within the current TxOP. Upon receiving the SFI and COT range indication, a UE may engage in communications with the serving UE in accordance with the COT range indication and the SFI.

公开(公告)号：US10687359B2

公开(公告)日：2020-06-16

申请号：US15987511

申请日：2018-05-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W74/08 ,  H04W16/14 ,  H04W56/00 ,  H04W74/00

Abstract: Methods, systems, and devices for wireless communications are described. In some wireless systems utilizing shared radio frequency spectrum bands, base stations may operate in different listen before talk (LBT) modes. For example, a base station may operate in an LBT enabled mode or a non-LBT enabled mode. A UE may perform system acquisition with the base station based on receiving acquisition signals (e.g., synchronization signals and physical broadcast channel (PBCH) signals) from the base station. These acquisition signals may depend on the LBT mode of the base station. For example, the frame timing and number of subframes for the acquisition signals may be based on the LBT mode of the base station. In some cases, a base station may adaptively switch LBT modes, and the UE may re-synchronize with the base station based on an LBT configuration period or a paging message from the base station.