公开(公告)号：US20210258953A1

公开(公告)日：2021-08-19

申请号：US17228698

申请日：2021-04-12

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04L27/00 ,  H04L27/26 ,  H04W72/12 ,  H04W24/10 ,  H04W74/08

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 (HARQ) 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：US11088798B2

公开(公告)日：2021-08-10

申请号：US16544592

申请日：2019-08-19

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Shimman Arvind Patel ,  Aleksandar Damnjanovic

IPC: H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04W76/27 ,  H04L1/18 ,  H04L27/26 ,  H04W72/14 ,  H04L25/02

Abstract: Various aspects described herein relate to communicating in a wireless network. A resource grant comprising an indicator of whether to transmit a demodulation reference signal (RS) for an uplink control channel or an uplink data channel can be received from a network entity. It can be determined whether to transmit the RS in at least one transmission time interval (TTI) based at least in part on the indicator.

公开(公告)号：US11071162B2

公开(公告)日：2021-07-20

申请号：US15922042

申请日：2018-03-15

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Tingfang Ji ,  Naga Bhushan ,  Peter Gaal ,  John Edward Smee

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/00 ,  H04W76/27 ,  H04W72/14 ,  H04W72/00 ,  H04W76/28 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems (e.g., New Radio (NR) systems) may support the dynamic configuration of time intervals (or slots) for communication in a specific link direction (e.g., uplink, downlink, sidelink, etc.). In such cases, a base station may dynamically allocate time intervals (or slots) for broadcast or multicast data (e.g., via a physical downlink control channel (PDCCH)) based on the dynamically determined configuration of certain time intervals (or slots). The dynamic allocation of resources for broadcast or multicast data may ensure that broadcast or multicast data is not scheduled to be transmitted during time intervals configured for uplink communication. In some cases, the broadcast or multicast data may be transmitted on a portion of a system bandwidth that is frequency division multiplexed with another portion of the system bandwidth allocated for mobile broadband (MBB) communications.

公开(公告)号：US20210212056A1

公开(公告)日：2021-07-08

申请号：US17208591

申请日：2021-03-22

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Wanshi Chen ,  Juan Montojo ,  Jing Sun ,  Seyedkianoush Hosseini

IPC: H04W72/04 ,  H04L5/00 ,  H04L5/14 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communication are described. Data may be received during transmission time intervals (TTIs) that have a short duration relative to other TTIs. The short-duration TTIs may occur within or overlap a longer duration TTI, such as a subframe. Feedback responsive to the data may be generated and assigned for transmission during an uplink TTI according to a feedback timing or delay, which may be selected to reduce latency or balance the payload size of uplink messages sent during the assigned uplink TTI. Data and feedback assignments in short-duration TTIs may be configured based on a time division duplexing (TDD) configuration for some TTIs (e.g., subframes). TTIs that are a Long Term Evolution (LTE) subframe, an LTE slot, and a duration of two LTE symbol periods may be supported. Portions of special TTIs may be used for transmissions according to shorter-duration TTIs.

公开(公告)号：US10985948B2

公开(公告)日：2021-04-20

申请号：US15441092

申请日：2017-02-23

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Wanshi Chen ,  Juan Montojo ,  Shimman Arvind Patel ,  Hao Xu

IPC: H04L25/02 ,  H04J11/00 ,  H04B1/10 ,  H04L25/03 ,  H04B17/345 ,  H04L5/00 ,  H04L27/26

Abstract: Noise and interference may be estimated at a user equipment (UE) in a system that may support transmissions having different transmission time intervals (TTIs). The UE may perform a channel estimation for a first set of transmissions having a first TTI based at least in part on an estimated interference from a second set of transmissions having a second TTI that is shorter than the first TTI. The UE may perform channel estimation for orthogonal frequency division multiplexing (OFDM) symbols of the first set of transmissions. The first set of transmissions may then be demodulated based at least in part on the channel estimation for the first set of transmissions. Noise and interference may also be estimated based on one or more null tones within one or more OFDM symbols of the allocated resources.

公开(公告)号：US10966198B2

公开(公告)日：2021-03-30

申请号：US16409102

申请日：2019-05-10

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04W72/12 ,  H04W72/14 ,  H04W88/08

Abstract: Various aspects described herein relate to receiving wireless communications from an access point, determining resources of the wireless communications associated with a search space for control information in the received wireless communications, and performing one or more of a set of blind decodes over the search space to decode at least low latency control information associated with a low latency communication technology, wherein the low latency communication technology utilizes a transmission time interval (TTI) having a duration that is less than a subframe of a legacy communication technology.

公开(公告)号：US10939454B2

公开(公告)日：2021-03-02

申请号：US14930017

申请日：2015-11-02

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Shimman Arvind Patel ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei ,  Madhavan Srinivasan Vajapeyam ,  Aleksandar Damnjanovic

IPC: H04W72/10 ,  H04W72/12 ,  H04L1/00 ,  H04L5/00 ,  H04W72/00 ,  H04W72/04 ,  H04W16/14 ,  H04W88/06

Abstract: Various aspects described herein relate to receiving a first communication over a first set of resources based on a first transmission time interval (TTI), receiving a second communication over a second set of resources based on a second TTI, where the second TTI is smaller than the first TTI, and where the second set of resources overlap the first set of resources defining a common set of resources, and determining whether to prioritize decoding of the first communication over the second communication.

公开(公告)号：US10893520B2

公开(公告)日：2021-01-12

申请号：US15244653

申请日：2016-08-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W72/00 ,  H04L5/00 ,  H04B7/0456

Abstract: Various techniques for narrowband communications in a wireless communications network are provided. Narrowband communications may be transmitted using a single resource block (RB) of a number of RBs used for wideband communications. In order to provide for efficient device discovery and synchronization using narrowband communications, a synchronization signal, such as a primary synchronization signal (PSS) or secondary synchronization signal (SSS), may be transmitted within the single resource block. The synchronization signal may be transmitted, for example, using multiple orthogonal frequency division multiplexing (OFDM) symbols within the single RB. A common reference signal (CRS) may also be present in the single resource block, which may puncture the synchronization signal, in some examples. In other examples, the synchronization signal may be mapped to non-CRS symbols of the single resource block.

公开(公告)号：US10892928B2

公开(公告)日：2021-01-12

申请号：US15953878

申请日：2018-04-16

Applicant: QUALCOMM Incorporated

Inventor： Seyedkianoush Hosseini ,  Shimman Arvind Patel ,  Wanshi Chen

IPC: H04L27/26 ,  H04W72/04 ,  H04L5/00 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communication are described. In some aspects, a user equipment (UE) may identify a resource block set that includes a data region and a control region, wherein the resource block set spans a portion of a system bandwidth in a shortened transmission time interval (sTTI), wherein the sTTI includes three symbols, wherein the control region occupies the three symbols and includes control information for the UE for the sTTI, and wherein the control region and the data region are frequency division multiplexed. The UE may obtain content in the sTTI based at least in part on the control information. Numerous other aspects are provided.

公开(公告)号：US10834750B2

公开(公告)日：2020-11-10

申请号：US16215360

申请日：2018-12-10

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Wanshi Chen ,  Peter Gaal

IPC: H04W72/12 ,  H04L5/00 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04W72/02 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and a base station may use low latency communications to improve the throughput of a wireless link. To facilitate efficient low latency communication, the UE may send UE-initiated CSI reports in addition to periodic and base station-initiated reports. For example, the UE may, in various examples, send UE-initiated CSI reports using contention based spectrum, using a request-to-transmit, or using a CSI differential (i.e., an indicator of a change in channel conditions). The base station may schedule different UEs for uplink low latency communication by providing resources to each UE for CSI and scheduling requests (SRs) using coherent or non-coherent uplink transmissions. The CSI and SR may also be combined with uplink feedback.