公开(公告)号：US10110363B2

公开(公告)日：2018-10-23

申请号：US14988069

申请日：2016-01-05

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Durga Prasad Malladi ,  Peter Gaal ,  Yongbin Wei ,  Hao Xu ,  Shimman Arvind Patel ,  Tao Luo ,  Michael Mao Wang

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

Abstract: Methods, systems, and devices for wireless communication are described. A wireless system utilizing one or more time-division duplexing (TDD) configured carriers may utilize a dual transmission time interval (TTI) structure (e.g., at the subframe level and symbol-level). The symbol level TTIs may be referred to as low latency (LL) TTIs, and may be organized within LL subframes. A LL subframe may be a subframe that is scheduled for transmissions in one direction (e.g., uplink or downlink, according to a TDD configuration) and may include multiple LL symbols scheduled for both uplink (UL) and downlink (DL) transmissions. Guard periods may be scheduled between adjacent LL symbols that have opposite directions of transmission to enable user equipment (UEs) to transition from receiving mode to transmit mode (or vice versa). The LL subframes may be transparent to receiving devices that do not support LL operations.

公开(公告)号：US10103856B2

公开(公告)日：2018-10-16

申请号：US15099364

申请日：2016-04-14

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Shimman Arvind Patel ,  Peter Gaal ,  Hao Xu

IPC: H04L5/00 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communication are described. A base station may select, and a user equipment (UE) may identify, an initial symbol of a transmission time interval (TTI) based on a particular characteristic of a communication link between the base station and UE. A two-symbol TTI for one UE may thus be scheduled to align with or complement a longer TTI for another UE. For instance, the initial symbol of a two-symbol TTI may be restricted to certain symbol periods of a Long Term Evolution (LTE) subframe to limit interference with other transmissions scheduled during the subframe (e.g., reference signals, control channels, guard periods, etc.). Additionally or alternatively, a UE may identify and blindly decode control channel transmissions for low latency communications by assuming a presence of reference signals within the symbols that include a low latency control channel.

公开(公告)号：US10080244B2

公开(公告)日：2018-09-18

申请号：US15244385

申请日：2016-08-23

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Madhavan Srinivasan Vajapeyam ,  Wanshi Chen ,  Alberto Rico Alvarino ,  Renqiu Wang ,  Hao Xu ,  Seyed Ali Akbar Fakoorian ,  Shimman Arvind Patel ,  Peter Gaal

IPC: H04W74/08 ,  H04W72/04 ,  H04L5/00 ,  H04W16/30 ,  H04W72/02 ,  H04W74/00

CPC classification number: H04W74/0833 ,  H04L5/0048 ,  H04W16/30 ,  H04W72/02 ,  H04W72/0453 ,  H04W74/002

Abstract: Random access techniques may use subcarriers allocated for random access requests in narrowband communication. Physical resources may be selected for transmission of a random access request based on a “coverage class” of a user equipment (UE). In some examples, a set of coverage classes may be identified based on one or more UE channel conditions, such as pathloss. Each coverage class may have one or more associated subcarriers of a set of subcarriers in a narrowband bandwidth, and random access messages may be transmitted using the associated subcarrier(s) for the coverage class of a UE. In some examples, different coverage classes may have different numbers of redundant transmissions of a random access message, which may be based on channel conditions associated with a particular coverage class. A UE, based on a measured channel condition, may determine a coverage class and select a subcarrier based on the determined coverage class.

公开(公告)号：US20180262398A1

公开(公告)日：2018-09-13

申请号：US15915430

申请日：2018-03-08

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Seyedkianoush Hosseini ,  Alberto Rico Alvarino ,  Shimman Arvind Patel

IPC: H04L12/24 ,  H04W76/27 ,  H04W72/04 ,  H04L5/00 ,  H04W52/18 ,  H04W24/02

CPC classification number: H04L41/0836 ,  H04L5/0055 ,  H04W24/02 ,  H04W52/08 ,  H04W52/10 ,  H04W52/18 ,  H04W72/0406 ,  H04W72/044 ,  H04W72/12 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communication are described. Wireless communications systems as described herein may be configured to support several service types with different latency, reliability, or throughput rates or standards. One such service type may be referred to as high-reliability, low latency communication (HRLLC). Enhancements to improve HRLLC performance in coexistence with and as a complement to legacy service types, such as LTE are described. These include, for example, downlink and uplink control enhancements, channel state information (CSI) feedback enhancements, physical uplink shared channel (PUSCH) enhancements, and UL power control enhancements to support HRLLC.

公开(公告)号：US20180213532A1

公开(公告)日：2018-07-26

申请号：US15789776

申请日：2017-10-20

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Wanshi Chen ,  Peter Gaal ,  Shimman Arvind Patel

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

Abstract: Methods, systems, and devices for wireless communication are described in which scheduling of time and frequency resources for multiple component carriers (CCs) may be provided in a low latency physical downlink control channel (sPDCCH) transmission to a user equipment (UE). The scheduling information may include a first portion that is transmitted during a first transmission time interval (TTI) and that includes scheduling information (UE-specific or common for multiple UEs) for two or more shortened TTIs (sTTIs) on one or more CCs, and a second portion that may be specific to the particular sTTI on one or more CCs. Rate matching information may be provided to indicate portions of the sPDCCH that may be reallocated for shared channel transmissions. The scheduling information may be, in some cases, provided in a single-level scheduling information transmission for two or more UEs, that provides UE-specific resources on one or more CCs.

公开(公告)号：US10021712B2

公开(公告)日：2018-07-10

申请号：US15294453

申请日：2016-10-14

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Wanshi Chen

IPC: H04W72/12 ,  H04B7/0413 ,  H04L5/00 ,  H04B7/06 ,  H04W72/04

CPC classification number: H04W72/1231 ,  H04B7/0413 ,  H04B7/0626 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0062 ,  H04L5/0087 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/046 ,  H04W72/1268

Abstract: Various aspects described herein relate to determining a configuration of reference signal (RS) resources in wireless communications. A scheduling grant of resources can be received from an access point, wherein the scheduling grant indicates one or more parameters related to transmission locations of one or more RSs. RS resource locations can be determined for the one or more RSs based at least in part on the one or more parameters. The one or more RSs can be received over the RS resource locations allowing for decimation of the RSs in time and/or frequency.

公开(公告)号：US10015776B2

公开(公告)日：2018-07-03

申请号：US15365539

申请日：2016-11-30

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Wanshi Chen ,  Peter Gaal ,  Shimman Arvind Patel ,  Juan Montojo ,  Aleksandar Damnjanovic

IPC: H04W72/04 ,  H04W72/00 ,  H04L27/26 ,  H04W8/18 ,  H04W24/08 ,  H04W76/28

CPC classification number: H04W72/005 ,  H04L27/2601 ,  H04W8/186 ,  H04W24/08 ,  H04W72/042 ,  H04W72/0446 ,  H04W76/28

Abstract: Techniques for low latency point to multipoint (PTM) communications in a system supporting communications using multiple different transmission time interval (TTI) durations are provided. The low latency PTM communications may be supported by one or more physical channels that support PTM communications at shortened TTI durations. In some examples, a base station may allocate, in a PTM traffic channel, a first set of resources for PTM transmissions with a first user equipment (UE) and a second UE, and may allocate a second set of resources (e.g., in a physical downlink shared channel (PDSCH)) for unicast transmissions to the first UE. The PTM transmissions may be transmitted using TTIs configured with durations shorter than TTIs used for transmitting unicast transmissions. Different sets of PTM resources may be allocated for different PTM transmissions having different TTI durations.

公开(公告)号：US20180139083A1

公开(公告)日：2018-05-17

申请号：US15806812

申请日：2017-11-08

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Wanshi Chen ,  Jing Sun ,  Peter Gaal ,  Shimman Arvind Patel

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

CPC classification number: H04L27/2613 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04W72/0413

Abstract: Techniques provide for identifying uplink resources that are to be used for uplink transmissions using shortened transmission time intervals (sTTIs), such as low latency or high reliability transmissions. A reference signal (RS) configuration for a three-symbol sTTI, including locations of one or more RS symbols and one or more data symbols within the sTTI may be identified. The RS configuration, along with the allocation of uplink resources, may be provided to a user equipment (UE) which may transmit uplink communications using the allocated uplink resources.

公开(公告)号：US20180132235A1

公开(公告)日：2018-05-10

申请号：US15460215

申请日：2017-03-15

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Srinivas Yerramalli ,  Wanshi Chen ,  Jing Sun ,  Hao Xu ,  Shimman Arvind Patel

IPC: H04W72/04 ,  H04W8/22 ,  H04L5/00 ,  H04W74/08 ,  H04W16/14 ,  H04W24/10

CPC classification number: H04W72/0446 ,  H04L1/1861 ,  H04L5/001 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0057 ,  H04L5/0064 ,  H04L5/0091 ,  H04L5/0092 ,  H04L5/14 ,  H04L27/0006 ,  H04L27/2602 ,  H04W8/22 ,  H04W16/14 ,  H04W24/10 ,  H04W72/042 ,  H04W72/1289 ,  H04W74/0808

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may transmit uplink (UL) messages in unlicensed spectrum with a reduced UL timing delay. The UL timing delay may be reduced by using a shortened transmission time interval (TTI) (e.g., a TTI that is reduced in duration relative to other TTIs in the system or in a legacy system) or by reducing the number of TTIs between a grant and the corresponding UL message. The reduced UL timing delay may decrease the likelihood that the UE will wait for a subsequent transmit opportunity (TxOp) to transmit the UL message. In some cases, the reduced UL timing delay corresponds to a reduced hybrid automatic repeat request (HARM) processing delay. In some cases, a time difference (e.g., measured in TTIs) between a measurement reference TTI a corresponding channel state information (CSI) report may also be reduced.

公开(公告)号：US20180091285A1

公开(公告)日：2018-03-29

申请号：US15704733

申请日：2017-09-14

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Wanshi Chen ,  Peter Gaal ,  Jing Sun ,  Shimman Arvind Patel

IPC: H04L5/14 ,  H04L5/00

CPC classification number: H04L5/1469 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0083

Abstract: Methods, systems, and devices for wireless communication are described. A base station may allocate resources for communication with a user equipment (UE). The resources may include one or more subframes, and each subframe may include one or more shortened transmission time intervals (sTTIs). Each sTTI may be assigned a transmission direction according to a time division duplex (TDD) pattern. Based on traffic needs and/or interference from other UEs and/or base stations, the base station may determine to modify the TDD pattern used for communication. Accordingly, a base station may transmit an indicator in a control message or control region of a TTI or sTTI, to indicate to users that a transmission direction of an sTTI in the TDD pattern is being changed. Subsequently, a user may communicate with the base station according to the reconfigured TDD pattern.