公开(公告)号：US10397915B2

公开(公告)日：2019-08-27

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: H04L1/18 ,  H04L5/00 ,  H04L5/14 ,  H04W8/22 ,  H04L27/00 ,  H04L27/26 ,  H04W16/14 ,  H04W24/10 ,  H04W72/04 ,  H04W72/12 ,  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：US10367618B2

公开(公告)日：2019-07-30

申请号：US15684558

申请日：2017-08-23

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Wanshi Chen ,  Tao Luo

IPC: H04L5/00 ,  H04W72/04 ,  H04L27/00 ,  H04W16/14

Abstract: Techniques are described for wireless communication. In one method, a positioning reference signal (PRS) may be generated. The PRS may be configured in at least one downlink subframe among a plurality of downlink subframes. The PRS may be transmitted in the at least one downlink subframe using an unlicensed radio frequency spectrum band.

公开(公告)号：US10341061B2

公开(公告)日：2019-07-02

申请号：US15444875

申请日：2017-02-28

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/18 ,  H04W72/04 ,  H04W72/12 ,  H04W74/02 ,  H04L5/00

Abstract: Systems, methods, and apparatuses are described for wireless communication, including for hybrid automatic repeat request (HARQ) feedback in a system that supports communications using transmission time intervals (TTIs) of different durations. A base station may identify a user equipment's (UE) capability to provide HARQ feedback for transmissions that use TTIs of a shorter duration relative to other TTIs supported in the system. The base station may select a HARQ timing mode based on the capability of the UE and may indicate the selected HARQ timing mode to the UE. The base station may then transmit one or more data transmissions to the UE using the reduced TTIs. The UE may respond with HARQ feedback based on the HARQ timing mode. The HARQ timing mode may be based on different response times based on the location of the data transmission within a TTI or relative to data transmission in other TTIs.

公开(公告)号：US10306627B2

公开(公告)日：2019-05-28

申请号：US15612698

申请日：2017-06-02

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W72/14 ,  H04W72/12 ,  H04L1/00 ,  H04L5/00 ,  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：US10278167B2

公开(公告)日：2019-04-30

申请号：US15443938

申请日：2017-02-27

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W72/04 ,  H04J1/00 ,  H04L12/26 ,  H04L5/00 ,  H04L1/18

Abstract: Methods, systems, and devices for wireless communication are described. In one example, an indication in a first control message in a control region of a first transmission time interval (TTI) identifies a data region of the first TTI. A data region of the second TTI may be identified based on a grant of resources received in a second control message of a second TTI, where the data region of the first TTI and the control region of the second TTI are frequency division multiplexed with the data region of the second TTI. Other examples include a downlink grant at the beginning of a control region and uplink grants at the end of the control region. In other examples, a downlink grant for a user equipment (UE) may include an indication of resources allocated to the UE in that resource block and a second resource block.

公开(公告)号：US10243713B2

公开(公告)日：2019-03-26

申请号：US15013151

申请日：2016-02-02

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W48/12

Abstract: Methods, systems, and devices are described for wireless communication at a device. Demodulation reference signals (DMRS) may be used to facilitate demodulation of low latency control or data channels, or both. A wireless communication device may, for example, identify a carrier configuration with transmission time intervals (TTIs) of different durations. A carrier may be configured with TTIs that support low latency operations. A DMRS pattern for resources of a low latency TTI may be determined, and that first DMRS pattern may be based on a DMRS pattern for resources of another, longer-duration TTI. Devices may thus communicate using resources of a low latency TTI based on the first DMRS pattern. For example, a user equipment (UE) may demodulate resources of a low latency channel using the first DMRS pattern, and the first DMRS pattern may be consistent with DMRS patterns supporting non-low latency within a common wireless system.

公开(公告)号：US20190029013A1

公开(公告)日：2019-01-24

申请号：US16129452

申请日：2018-09-12

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Aleksandar Damnjanovic ,  Onkar Jayant Dabeer ,  Peter Gaal ,  Wanshi Chen ,  Shimman Arvind Patel ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04W72/04 ,  H04L1/18 ,  H04W74/08 ,  H04W72/14 ,  H04W28/02 ,  H04W76/27

Abstract: Certain aspects relate to methods and apparatus for latency reduction for UEs in a RRC connected mode. During contention-based uplink access by groups of UEs within a subframe, an eNB may decode the received uplink transmission based, at least in part, on the assigned group of resources assigned to the UE and used for transmission. Additional orthogonalization techniques such as reduced TTI size can be used to reduce collisions among different users performing contention-based transmissions. Furthermore, when the eNB fails to successfully decode the uplink transmission, the eNB may identify the UE that sent the uplink transmission based on a detected reference signal and may transmit an uplink assignment to the identified UE.

公开(公告)号：US20180331813A1

公开(公告)日：2018-11-15

申请号：US15976079

申请日：2018-05-10

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Seyedkianoush Hosseini ,  Heechoon Lee ,  Wanshi Chen

IPC: H04L5/00 ,  H04W72/04

CPC classification number: H04L5/0098 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0094 ,  H04W72/042 ,  H04W72/0453

Abstract: Methods, systems, and devices for wireless communication are described that provide allocation of wireless resources for UEs in carrier aggregation resource groups that span two or more component carriers (CCs). A carrier aggregation resource group may include a portion of available wireless resources in two or more CCs, and multiple carrier aggregation resource groups may be configured that may include resources that span overlapping or non-overlapping CCs. Downlink control information may be transmitted using a downlink control region that spans two or more CCs in a carrier aggregation resource group. A UE may be configured to monitor multiple CCs for downlink control information, such as through blind decodes of each CC that may contain downlink control information.

公开(公告)号：US10129859B2

公开(公告)日：2018-11-13

申请号：US15191460

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Shimman Arvind Patel ,  Hao Xu ,  Juan Montojo ,  Aleksandar Damnjanovic

IPC: H04W72/04 ,  H04J11/00 ,  H04W74/08 ,  H04L5/00 ,  H04W56/00 ,  H04W76/27

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device such as a user equipment (UE) or a base station may identify a set of resource element groups (REGs) for low latency communication, and each REG may include a portion of a different resource block (RB) of a set of RBs (e.g., a set of non-contiguous RBs). The device may then map an uplink control channel to the selected REGs and communicate on the uplink control channel accordingly. Reference signals may also be transmitted in the same RBs, and the REGs may be mapped around the resources used for reference signals. In some cases, multiple UEs may transmit uplink control data using the same resources using code division multiplexing (CDM) (e.g., if the control payload is relatively small). In other cases, multiple UEs may be frequency division multiplexed (FDM).

公开(公告)号：US10123349B2

公开(公告)日：2018-11-06

申请号：US15169420

申请日：2016-05-31

Applicant: QUALCOMM Incorporated

Inventor： Shimman Arvind Patel ,  Wanshi Chen ,  Peter Gaal

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