公开(公告)号：US10454520B2

公开(公告)日：2019-10-22

申请号：US15670697

申请日：2017-08-07

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Hao Xu ,  Alberto Rico Alvarino ,  Peter Gaal ,  Masato Kitazoe ,  Sharad Sambhwani

IPC: H04B1/713 ,  H04W76/27 ,  H04L1/00 ,  H04W4/70 ,  H04L5/00 ,  H04W68/00 ,  H04B1/7156 ,  H04W88/06 ,  H04W68/02 ,  H04W68/04 ,  H04W74/08

Abstract: Coverage enhancements and coverage mode switching related optimizations are discussed for user equipments (UEs) that may switch between various coverage extension (CE) and non-CE modes of operation. In such enhancements, paging uncertainty and delays may be reduced by sending pages either simultaneously or using historical information over multiple coverage modes available to UEs. Random access procedures may be improved by providing CE mode random access procedures that are available when normal mode random access attempts fail and before declaring radio link failure. Additional aspects include improvements for more advanced UEs to improve coverage within normal mode operations by leveraging techniques used for narrowband CE mode operations, including transmission repetition and gapless transmission scheduling over hopped narrowband frequencies.

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：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：US20190124626A1

公开(公告)日：2019-04-25

申请号：US15793580

申请日：2017-10-25

Applicant: QUALCOMM Incorporated

Inventor： Kapil Bhattad ,  Hao Xu ,  Alberto Rico Alvarino ,  Xiao feng Wang ,  Peter Gaal

IPC: H04W72/04 ,  H04L1/00

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may identify a payload size, associated with performing a search for a physical downlink control channel (PDCCH), wherein the payload size is identified based at least in part on an aggregation level, associated with performing the search for the PDCCH, or an offset associated with performing the search for the PDCCH; and perform the search for the PDCCH based at least in part on the payload size. Numerous other aspects are provided.

公开(公告)号：US20180343612A1

公开(公告)日：2018-11-29

申请号：US15843948

申请日：2017-12-15

Applicant: QUALCOMM Incorporated

Inventor： Prashanth AKULA ,  Alberto Rico Alvarino ,  Hao Xu ,  Xiao feng Wang ,  Umesh Phuyal ,  Kapil Bhattad ,  Wanshi Chen ,  Peter Gaal ,  Mungal Singh Dhanda

IPC: H04W52/02

CPC classification number: H04W52/0212 ,  H04L5/16

Abstract: Some aspects described herein reduce the negative performance impact associated with the voltage droop of a user equipment (UE) battery. For example, aspects described herein may be used to configure a UE with a pattern that includes a battery recovery time period that prevents a battery voltage of the UE from falling below a critical threshold and/or reduces the likelihood of the battery voltage falling below the critical threshold. In this way, UE performance may be improved, battery performance may be improved, battery life may be extended, and/or the like.

公开(公告)号：US20180220426A1

公开(公告)日：2018-08-02

申请号：US15661860

申请日：2017-07-27

Applicant: QUALCOMM Incorporated

Inventor： Alberto RICO ALVARINO ,  Kapil Bhattad ,  Xiao feng Wang ,  Juan Montojo ,  Wanshi Chen ,  Peter Gaal

IPC: H04W72/04

CPC classification number: H04W72/0466 ,  H04J11/005 ,  H04L1/08 ,  H04W72/042

Abstract: A base station (BS) may transmit, and a user equipment (UE) may receive, a physical broadcast channel, such as a narrowband physical broadcast channel (NB-PBCH). In an interference-limited scenario with synchronous cells in a network, repetitions of a symbol being transmitted for a first physical broadcast channel of a first cell may collide with repetitions of a symbol being transmitted for a second physical broadcast channel of a second cell. This may result in the UE being unable to recover symbols of a physical broadcast channel. In some aspects, the BS may transmit, and the UE may receive, a physical broadcast channel including bits processed using a first processing stage, such as using first scrambling sequences, and a second processing stage, such as using second scrambling sequences, to compensate for the interference, thereby ensuring that the UE can recover the symbols of the physical broadcast channel.

公开(公告)号：US09831994B2

公开(公告)日：2017-11-28

申请号：US14820346

申请日：2015-08-06

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Juan Montojo ,  Kapil Bhattad

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04L5/0048

Abstract: In a wireless communication system, a wireless device is identified as being a relay device. A channel state information reference signal (CSI-RS) configuration is selected such that at least one CSI-RS can be transmitted to the wireless device in a subset of subframes assigned to relay backhaul transmissions.

公开(公告)号：US09735932B2

公开(公告)日：2017-08-15

申请号：US14661978

申请日：2015-03-18

Applicant: QUALCOMM Incorporated

Inventor： Xiliang Luo ,  Peter Gaal ,  Juan Montojo ,  Wanshi Chen ,  Hao Xu ,  Tao Luo ,  Kapil Bhattad

IPC: H04L1/02 ,  H04L5/00 ,  H04L1/00 ,  H04L25/03 ,  H04B7/0456 ,  H04B7/04 ,  H04W72/04 ,  H04B7/0413 ,  H04L1/18

CPC classification number: H04L5/0023 ,  H04B7/0413 ,  H04B7/0456 ,  H04B7/0486 ,  H04L1/0031 ,  H04L1/1896 ,  H04L5/0053 ,  H04L5/0091 ,  H04L25/03343 ,  H04L25/03891 ,  H04W72/042

Abstract: A precoding scheme to accommodate user equipment (UEs) having higher Doppler speeds. In such transmission schemes, a different precoding matrix is applied to each orthogonal frequency division multiplex (OFDM) symbol in the transmission stream. Additionally, a downlink control message format is defined to handle assignment of multiple different transmission schemes using the same message format. The downlink control message format includes a control element in one of the message fields along with a set of parameters specifically applicable to the assigned transmission scheme. Based on the value of this control element, the UE sets the specific transmission scheme and determines a set of interpretation rules uniquely associated with that transmission scheme. Using the interpretation rules, the UE is able to read the set of parameters as applied to the selected transmission scheme.