公开(公告)号：US20190305834A1

公开(公告)日：2019-10-03

申请号：US16447280

申请日：2019-06-20

Applicant: Qualcomm Incorporated

Inventor： Seyed Ali Akbar Fakoorian ,  Xiaoxia Zhang ,  Taesang Yoo ,  Siddhartha Mallik ,  Juan Montojo

IPC: H04B7/0456 ,  H04B7/022 ,  H04B7/08 ,  H04B7/00

Abstract: Reference signal and transmitter (Tx)/receiver (Rx) precoding for user equipment (UE) multiplexing in new radio (NR) shared spectrum networks is discussed. In certain reference signals, a base station may schedule multiple UEs for transmission of uplink reference signals within an identified subframe. The base station may transmit a reference signal configuration message, wherein the reference signal configuration message includes a transmission sequence identifier identifying a multiplexing for antenna ports assigned for transmission of the uplink reference signals. The multiplexing may be one or both of frequency divisional multiplexing (FDM) and time division multiplexing (TDM) over the identified subframe. Additional reference signals, transmit precoders may be identified by the base station based on channel inversion calculations of the channel matrix determined based on uplink reference signals.

公开(公告)号：US10432386B2

公开(公告)日：2019-10-01

申请号：US15191452

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/14 ,  H04L1/18 ,  H04L5/00 ,  H04L27/26 ,  H04W72/04 ,  H04W72/08

Abstract: Methods, systems, and devices for wireless communication are described. A wireless device may identify a configuration for uplink and downlink communications that defines subframe configuration options for each subframe of a frame. For example, the configuration may establish parameters for time division duplexing (TDD) operation between a base station and a user equipment (UE). The wireless device may determine a constraint for a subframe of the frame based on the configuration and determine an adaptive subframe configuration based on the constraint. The adaptive subframe configuration may include one or several downlink symbol periods and one or several uplink symbol periods. The wireless device may communicate during the subframe according to the adaptive subframe configuration rather than the original configuration. The adaptive subframe may be constrained by the identified uplink and downlink configuration, which may avoid disruption to UEs.

公开(公告)号：US10419197B2

公开(公告)日：2019-09-17

申请号：US15847214

申请日：2017-12-19

Applicant: QUALCOMM Incorporated

Inventor： Juan Montojo ,  Yeliz Tokgoz ,  Valentin Gheorghiu

IPC: H04W4/00 ,  H04L5/14 ,  H04B7/26 ,  H04W74/00 ,  H04L5/00 ,  H04W74/08 ,  H04W48/12

Abstract: Wireless communications systems and methods related to performing initial network access procedures using shared resources are provided. A first wireless communication device transmits, in a first frequency band, a random access request to a first network. The first wireless communication device receives, in response to the random access request, a random access response from a second wireless communication device of the first network. The random access response is in a second frequency band allocated to the first network for time-division duplexing (TDD) communications. The second frequency band is different than the first frequency band.

公开(公告)号：US10389500B2

公开(公告)日：2019-08-20

申请号：US15410057

申请日：2017-01-19

Applicant: QUALCOMM Incorporated

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

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

Abstract: The present methods and apparatus enable transmission of an interlaced reference signal for two UEs using a comb structure. In some aspects, the present methods and apparatus may allocate resources and indicate whether a first UE and a second UE are to transmit DM-RS with a comb structure in a single slot based on the allocation. Further, in some aspects, the present methods and apparatus may allocate resources and transmit information indicating whether a first UE is to transmit DM-RS in a first slot or in both a first slot and a second slot within a subframe.

公开(公告)号：US20190239224A1

公开(公告)日：2019-08-01

申请号：US16382968

申请日：2019-04-12

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Juan Montojo ,  Tao Luo ,  Wanshi Chen

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/18 ,  H04W72/12 ,  H04W72/14 ,  H04W28/02 ,  H04W74/08 ,  H04W74/00 ,  H04W68/00 ,  H04L1/00 ,  H04W16/14 ,  H04W52/02 ,  H04W52/14 ,  H04W52/36 ,  H04W56/00

CPC classification number: H04W72/0446 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0013 ,  H04L1/004 ,  H04L1/18 ,  H04L1/1825 ,  H04L1/1861 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0053 ,  H04L5/0055 ,  H04Q2213/13215 ,  H04W16/14 ,  H04W28/0278 ,  H04W52/0216 ,  H04W52/146 ,  H04W52/367 ,  H04W56/0005 ,  H04W68/005 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/1226 ,  H04W72/1268 ,  H04W72/1284 ,  H04W72/1289 ,  H04W72/14 ,  H04W74/006 ,  H04W74/085 ,  Y02D70/00 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/1242 ,  Y02D70/126 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

Abstract: Techniques are described for wireless communication. One method includes detecting a first reference signal received from a user equipment (UE) in a reference scheduled transmission burst including a plurality of contiguous transmission time intervals (TTIs) received over a shared radio frequency spectrum band; identifying a reference TTI in which the first reference signal is received; determining a contention window size usable by the UE to contend for access to the shared radio frequency spectrum band; and transmitting an indication of the determined contention window size to the UE.

公开(公告)号：US10356764B2

公开(公告)日：2019-07-16

申请号：US15712584

申请日：2017-09-22

Applicant: QUALCOMM Incorporated

Inventor： Sony Akkarakaran ,  Tao Luo ,  Xiaoxia Zhang ,  Zhifei Fan ,  Juan Montojo

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/12 ,  H04L1/00 ,  H04W76/27 ,  H04L1/16 ,  H04L1/18

Abstract: A method of wireless communication may include transmitting an uplink slot with a first control region, a second control region, and (e.g., optionally) a data region. Each region may include time resources and frequency resources. Transmitting the uplink slot may include transmitting the first control region in an earlier part of the uplink slot and transmitting the second control region (e.g., and the data region) in a later part of the uplink slot. The first control region may include time-critical control information and the second control region may include non-time-critical control information. A receiver receiving the uplink slot may receive the first control region before receiving the data region and the second control region.

公开(公告)号：US10356761B2

公开(公告)日：2019-07-16

申请号：US15471524

申请日：2017-03-28

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Peter Gaal ,  Juan Montojo

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00 ,  H04W72/12 ,  H04W16/14 ,  H04W24/10

Abstract: Uplink control channel transmission in a shared radio frequency spectrum band may be transmitted using different uplink resources UCI based on a format of uplink control information (UCI) to be transmitted in the uplink control channel transmission. Different time resources, frequency resources, or combinations thereof, for the transmission of UCI by a UE may be provided by a base station and selected by the UE based on a UCI format. The resources to be used for UCI transmission may semi-statically configured, or dynamically indicated to a UE. Uplink transmissions may be configured in interlaces of frequency resources, with each interlace having one or more segments, and a base station may configure different segments for transmission of different format UCI. In some cases, different subframes, or different component carriers, may be configured for different formats of UCI.

公开(公告)号：US20190215859A1

公开(公告)日：2019-07-11

申请号：US16355105

申请日：2019-03-15

Applicant: QUALCOMM Incorporated

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

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

Abstract: Methods, systems, and devices for wireless communication are described. Different transmission time interval (TTI) durations may be supported and configured to coexist with one another. A set of TTIs with a relatively short duration may overlap in time with longer duration TTIs. Boundaries of TTIs with a relatively short duration may be configured to align with boundaries of relatively longer duration TTIs. For example, TTIs that are a Long Term Evolution (LTE) subframe, an LTE slot, and a duration of two LTE symbol periods may be supported. Two-symbol period TTIs may align with or be embedded within slot-duration TTIs, which, in turn, may align with or be embedded within a subframe. In some examples, one or more symbol periods of a subframe may be designated as a gap between two-symbol TTIs within the subframe, or such symbols may be merged with a two-symbol TTI within the subframe.

公开(公告)号：US10298378B2

公开(公告)日：2019-05-21

申请号：US15687745

申请日：2017-08-28

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/16 ,  H04L5/14 ,  H04L5/00 ,  H04W72/04 ,  H04W72/10

Abstract: Half-duplex (HD) operations enable low cost implementations of LTE terminals. Traditionally, HD operations may be linked to a particular frequency band which may not allow a mix of full-duplex (FD) and HD terminals in the same frequency band. Therefore, certain aspects of the present disclosure provide techniques for enabling coexistence, in a given frequency band, of HD and FD terminals, by introducing frequency bands designated for HD operation and overlapping existing frequency bands designated for FD operation.

公开(公告)号：US20190150172A1

公开(公告)日：2019-05-16

申请号：US16184855

申请日：2018-11-08

Applicant: QUALCOMM Incorporated

Inventor： Peter Pui Lok Ang ,  Juan Montojo ,  Wanshi Chen ,  Peter Gaal ,  Tao Luo ,  Tingfang Ji ,  Heechoon Lee ,  John Edward Smee ,  Jing Sun

IPC: H04W72/12 ,  H04W24/10

Abstract: Techniques are described for signaling a downlink bandwidth part (BWP) switching event and an aperiodic channel state information (A-CSI) request in a paired spectrum environment. The base station may transmit uplink scheduling downlink control information (DCI) to a user equipment (UE) that includes the A-CSI request and an identifier for the downlink BWP of the downlink BWP switching event. After receiving the A-CSI request and the downlink BWP, the UE may perform one or more CSI measurements using the downlink BWP. The UE may use physical uplink shared channel (PUSCH) resources associated with the uplink scheduling DCI to transmit the CSI report to the base station. Using these techniques, the base station may be configured to indicate that a downlink BWP switching event is to occur and allocate PUSCH resources to the UE to be used to transmit the CSI report associated with the downlink BWP switching event.