公开(公告)号：US20180092125A1

公开(公告)日：2018-03-29

申请号：US15462669

申请日：2017-03-17

Applicant: QUALCOMM Incorporated

Inventor： Haitong Sun ,  Jay Kumar Sundararajan ,  Joseph Binamira Soriaga ,  Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Tingfang Ji ,  Wei Zeng

IPC: H04W74/02

CPC classification number: H04W74/02 ,  H04W72/0413 ,  H04W72/1294 ,  H04W74/004

Abstract: Wireless communications systems and methods related to performing hybrid grant-free and grant-based uplink (UL) data transmission. A wireless communication device dynamically selects between a grant-free mode and a grant-based mode based on at least a transmission configuration. The wireless communication device sends a first data packet in the grant-free mode, based on the selecting, using a first UL resource. The wireless communication device sends a second data packet in the grant-based mode, based on the selecting, using a second UL resource allocated to the wireless communication device. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US09924498B2

公开(公告)日：2018-03-20

申请号：US13794757

申请日：2013-03-11

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Stefan Geirhofer ,  Peter Gaal ,  Tao Luo ,  Hao Xu

IPC: H04W72/04 ,  H04W48/20 ,  H04L1/00 ,  H04L1/18 ,  H04W48/10 ,  H04L27/26

CPC classification number: H04W72/0406 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/1861 ,  H04L27/2613 ,  H04W48/10 ,  H04W48/20

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a cell identifier is selected based on one or more properties associated with received downlink control information (DCI), where the properties may not be exclusively associated with determining a cell identifier. The cell identifier may be selected from a plurality of cell identifiers received through radio resource control signaling. The properties of the DCI may include a type of download control channel, a type of subframe and a type of DCI format used to provide the DCI.

公开(公告)号：US20180077683A1

公开(公告)日：2018-03-15

申请号：US15471658

申请日：2017-03-28

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Wanshi Chen ,  Hao Xu ,  Peter Gaal

IPC: H04W72/02 ,  H04L5/00 ,  H04W72/08 ,  H04B7/0404 ,  H04W52/24

CPC classification number: H04W72/02 ,  H04B7/0404 ,  H04B7/0608 ,  H04B7/0691 ,  H04B7/0874 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04W52/241 ,  H04W72/085

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may determine that a reference signal (RS) transmission has been triggered. The UE may select a subset of antennas from a set of available antennas based on a signal property associated with each antenna of the subset of antennas. The UE may transmit the RS using the selected subset of antennas.

公开(公告)号：US20180070347A1

公开(公告)日：2018-03-08

申请号：US15810528

申请日：2017-11-13

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Stefan Geirhofer ,  Hao Xu

IPC: H04W72/04 ,  H04L5/00

Abstract: Certain aspects provide methods and apparatus for wireless communications. One example method generally includes receiving a shared channel within a subframe, determining the same precoding may be used across resource blocks belonging to the same precoding resource block group (PRG) of the shared channel, and processing the shared channel based on the determination.

公开(公告)号：US20180070243A1

公开(公告)日：2018-03-08

申请号：US15644517

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Chirag Patel ,  Tamer Kadous ,  Hao Xu

IPC: H04W16/14 ,  H04W74/08 ,  H04W4/00 ,  H04L5/14 ,  H04W76/04

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) and base station may communicate using narrow band internet of things (NB-IoT) techniques or enhanced machine type communication (eMTC) in unlicensed spectrum. The UE may be an eMTC device or another device capable of communication without user direction. The UE may identify a geographic region and select a communication mode that is consistent with regulatory restrictions in that region. For example, in some cases, the communication mode may be based on using time division duplexing (TDD), using frequency hopping, or performing a listen-before-talk (LBT) procedure at the base station. A frame structure for TDD may include LBT subframes, uplink portions, downlink portions, and special subframes for switching. The base station may perform LBT procedures in the LBT subframes. If frequency hopping is enabled, a configurable number of TDD frames may be grouped into a hopping frame block.

公开(公告)号：US09907071B2

公开(公告)日：2018-02-27

申请号：US14801240

申请日：2015-07-16

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Hao Xu ,  Peter Gaal

IPC: H04W72/04 ,  H04W72/00 ,  H04B17/00 ,  H04W24/08 ,  H04L5/00 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W72/0446 ,  H04B17/0082 ,  H04L5/0053 ,  H04W24/08 ,  H04W72/005 ,  H04W72/0406 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices are described for wireless communication within and for user equipment (UE), including lower-complexity devices, which may have intermittent communication needs, low data rates, hard-to-reach locations, and the like. Devices within a wireless communication system may utilize transmission time interval (TTI) bundling to identify and employ various encoding schemes according to particular channel, transmission, and/or environmental conditions. Devices may also monitor and/or decode control-based transmission, control-less transmission, or both. In some examples, devices may monitor various channels based on a TTI bundling length. Some or any of these techniques may allow for coverage enhancement of UEs, including low-complexity UEs.

公开(公告)号：US20180054282A1

公开(公告)日：2018-02-22

申请号：US15674325

申请日：2017-08-10

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Hao Xu ,  Peter Gaal ,  Wanshi Chen ,  Tingfang Ji ,  Shimman Arvind Patel ,  John Edward Smee

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

Abstract: Methods, systems, and devices for wireless communication are described that provide for uplink common burst symbol waveform selection and configuration. A waveform for the uplink common burst symbol may be selected to be a single-carrier frequency division multiplexing (SC-FDM) waveform, an orthogonal frequency division multiplexing (OFDM) waveform, or combinations thereof, based at least in part on information that is to be transmitted. A pattern for SC-FDM sequences may be selected to provide enhanced channel estimation through common pilot tones across different sequences, wideband or narrowband sequences may be selected based at least in part on information to be transmitted, and acknowledgment feedback may be transmitted in an end portion of the uplink common burst symbol in some cases to provide additional processing time for determining the acknowledgment feedback.

公开(公告)号：US20180049166A1

公开(公告)日：2018-02-15

申请号：US15671972

申请日：2017-08-08

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04

CPC classification number: H04W72/042 ,  H04L5/0053 ,  H04L5/0092 ,  H04W72/0446

Abstract: Methods, systems, and devices for wireless communication are described. A base station may indicate time and frequency resources for a low latency physical downlink control channel (sPDCCH), which may be different from another physical downlink control channel (PDCCH), to a user equipment (UE). The base station may then transmit a common sPDCCH (CsPDCCH) message to indicate which low latency control channel elements (sCCEs) are used for sPDCCH transmission during a given subframe. In some cases, the signaling used to indicate the initial resource allocation for sPDCCH may be infrequent relative to the CsPDCCH transmissions. If some of the resources initially allocated for sPDCCH are not actually used for sPDCCH during a subframe, the base station and the UE may use those resources for communicating data. For example, the base station may transmit data using a low latency physical downlink shared channel (sPDSCH) to the UE using those resources.

公开(公告)号：US09888457B2

公开(公告)日：2018-02-06

申请号：US15339217

申请日：2016-10-31

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Tingfang Ji ,  Peter Gaal ,  Durga Prasad Malladi ,  Yongbin Wei ,  Wanshi Chen

IPC: H04W72/12 ,  H04L5/00 ,  H04L1/00 ,  H04W4/00 ,  H04W72/04 ,  H04W72/00 ,  H04W74/08 ,  H04W48/12 ,  H04B7/0413

CPC classification number: H04W72/005 ,  H04B7/0413 ,  H04L1/0013 ,  H04L5/0048 ,  H04W4/70 ,  H04W48/12 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/1284 ,  H04W74/0833

Abstract: Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to techniques for single-frequency network (SFN) operation for machine-type communications (MTC) coverage enhancements. A method is provided for wireless communications by a user equipment (UE). The method generally includes detecting a synchronization signal transmitted from at least one of a plurality of transmission points, wherein each of the plurality of transmission points transmits a synchronization signal at a different offset time relative to a subframe boundary in a synchronized network, determining a subframe occurring a fixed time after detecting the synchronization signal to monitor for system information transmitted from at least one of the plurality of transmission points, and monitoring for a system information block during the determined subframe.

公开(公告)号：US20180035422A1

公开(公告)日：2018-02-01

申请号：US15440947

申请日：2017-02-23

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Hao Xu ,  Wei Zeng ,  Jing Jiang ,  Tingfang Ji

IPC: H04W72/04 ,  H04L5/26 ,  H04L12/24 ,  H04L5/00

Abstract: Methods, systems, and devices for wireless communication are described that provide for uplink channel multiplexing and waveform selection. Uplink channels to be transmitted from one or more user equipment (UEs) to a base station are multiplexed together or separately into an uplink subframe. Each UE is capable of using different waveforms to transmit different channels. Reference signals are communicated according to an RS pattern, which is symmetric across uplink and downlink channels.