公开(公告)号：US10735070B2

公开(公告)日：2020-08-04

申请号：US15544370

申请日：2015-01-19

Applicant: QUALCOMM Incorporated

Inventor： Chao Wei ,  Wanshi Chen ,  Peter Gaal ,  Yu Zhang

IPC: H04B7/06 ,  H04B7/0456 ,  H04L5/00 ,  H04W72/04 ,  H04W88/02

Abstract: Mechanisms for reduction of channel state information (CSI) feedback overhead are disclosed for full dimensional multiple input, multiple output (FD-MIMO) systems with large dimension antenna ports. In one aspect, rank-dependent CSI antenna port measurements are used in order to limit the number of antenna ports for high rank CSI reporting. Another aspect allows a user equipment (UE) to select subband feedback for aperiodic CSI porting on an uplink shared channel when the UE is to report subband quality and precoding indicators. Another aspect provides for on-demand CSI feedback that dynamically configures CSI feedback parameters. To reduce the signaling overhead, the multiple parameter sets may be pre-configured with different values for dynamic reporting parameters.

公开(公告)号：US10727974B2

公开(公告)日：2020-07-28

申请号：US16448795

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Jelena M. Damnjanovic ,  Juan Montojo ,  Peter Gaal

IPC: H04L1/00 ,  H04L5/00 ,  H04W24/10

Abstract: Techniques for reporting channel quality information (CQI) in a multi-carrier wireless communication system are disclosed. In one aspect, a user equipment determines one or more reporting groups, each comprising a plurality of component carriers which are configured for the user equipment. The user equipment may detect a trigger from a base station that selects a reporting group and may respond to the trigger by sending CQI for at least the activated component carriers in the selected reporting group.

公开(公告)号：US10721727B2

公开(公告)日：2020-07-21

申请号：US16591366

申请日：2019-10-02

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Madhavan Srinivasan Vajapeyam ,  Wanshi Chen ,  Hao Xu

IPC: H04W72/04 ,  H04W4/70 ,  H04W76/28 ,  H04W52/02 ,  H04L5/00 ,  H04L1/18

Abstract: In narrowband communication, channels may use repetitions in multiple subframes. SPS and DRX for the narrowband communication may not accommodate such repetitions, because repetitions for a channel may fall only partially within a DRX ON duration. An apparatus addresses this problem by determining a DRX ON duration, determining a set of subframes carrying a narrowband PDCCH candidate and determining that the DRX ON duration at least partially overlaps with the set of subframes of the narrowband PDCCH. The apparatus then refrains from decoding the first narrowband PDCCH candidate, decodes the first narrowband PDCCH candidate, or extends the DRX ON duration to include the set of subframes entirely and decoding the first narrowband PDCCH candidate carried in the set of subframes in the extended DRX ON duration. The apparatus may also determine DRX configuration parameters based on parameters of bundled channels, and handle invalid subframes for an SPS grant.

公开(公告)号：US20200229063A1

公开(公告)日：2020-07-16

申请号：US16833239

申请日：2020-03-27

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Madhavan Srinivasan Vajapeyam ,  Hao Xu ,  Wanshi Chen ,  Peter Gaal

IPC: H04W36/36 ,  H04W4/70 ,  H04W48/20 ,  H04H20/38 ,  H04L5/00 ,  H04W36/00 ,  H04W72/04 ,  H04W72/08

Abstract: Cell selection techniques are provided for network access to cells that may employ one or more coverage enhancement techniques. A user equipment (UE), which may be a machine type communication (MTC) device, upon initial acquisition or upon wakeup may measure a reference signal received power (RSRP), reference signal received quality (RSRQ), or both, and determine a cell selection value based at least in part on the RSRP, RSRQ, or a combination thereof. The cell selection value may be determined based on an offset, which may be selected based on a measurement accuracy capability of the UE. UE sequential access attempts, neighbor cell list information that may include coverage enhancement of neighboring cells transmissions, and cell re-selection measurement frequency adjustments are also described.

公开(公告)号：US20200221469A1

公开(公告)日：2020-07-09

申请号：US16736640

申请日：2020-01-07

Applicant: QUALCOMM Incorporated

Inventor： Heechoon Lee ,  Peter Gaal ,  Wanshi Chen ,  Hari Sankar

IPC: H04W72/10 ,  H04W72/04 ,  H04W76/16 ,  H04L5/14 ,  H04L5/16

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first slot format configuration for a first cell associated with a first radio access technology (RAT) and a first radio frequency spectrum band that conflicts with a second slot format configuration for a second cell associated with a second RAT and a second radio frequency spectrum band during at least a portion of a transmission time interval (TTI). The UE may determine that the first cell has a priority over the second cell, based on the configured slot formats or based on the radio frequency bands, and may drop a communication on the second cell based on the identified priority. The UE may then communicate during at least a portion of the TTI on the first cell while the UE drops a communication on the second cell.

公开(公告)号：US10701729B2

公开(公告)日：2020-06-30

申请号：US14728859

申请日：2015-06-02

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Peter Gaal ,  Wanshi Chen ,  Aleksandar Damnjanovic ,  Yongbin Wei ,  Durga Prasad Malladi ,  Hao Xu ,  Madhavan Srinivasan Vajapeyam ,  Srinivas Yerramalli

IPC: H04W74/08 ,  H04W72/12 ,  H04L5/00

Abstract: Protection of transmission and reception of clear channel assessment (CCA)-exempt transmission (CET) is disclosed in which channel reserving signals or protection signals may be transmitted by the transmitter or receiver of the CET. The transmitted signals may be received by the neighboring access points that could potentially cause interference with the reception of the CET.

公开(公告)号：US10701699B2

公开(公告)日：2020-06-30

申请号：US16126139

申请日：2018-09-10

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Wanshi Chen ,  Jelena Damnjanovic ,  Peter Gaal

IPC: H04W4/00 ,  H04W72/04 ,  H04W52/14 ,  H04W52/34 ,  H04W52/36

Abstract: Techniques for wireless communication are described, which may include establishing a connection, by a user equipment (UE), with a first and second evolved NodeB (eNB), wherein each of the eNBs provide radio resources to the UE for respective uplink communications; receiving from the first eNB, at the UE, an indication including an allocation of uplink transmit power between the first eNB and at least the second eNB; and transmitting the uplink communications from the UE to the first and second eNBs based on the indication. The techniques may further include coordinating, by a first eNB, multi-connectivity communication for a UE with at least the first eNB and a second eNB; determining for the UE, at the eNB, an allocation of uplink transmit power between the first eNB and at least the second eNB; and transmitting an indication including the allocation of uplink transmit power allocation from the first eNB to the UE.

公开(公告)号：US10700801B2

公开(公告)日：2020-06-30

申请号：US15763500

申请日：2016-08-22

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Neng Wang

IPC: H04J11/00 ,  H04W76/20 ,  H04W16/02 ,  H04W76/11 ,  H04B7/024 ,  H04B7/0413 ,  H04L5/00 ,  H04W28/16

Abstract: Techniques are described for wireless communications at a user equipment (UE). One method includes determining a first cell identifier (ID) associated with a first downlink transmission in a first radio frequency spectrum band of paired radio frequency spectrum bands, determining a second cell ID associated with a second downlink transmission in a second radio frequency spectrum band of the paired radio frequency spectrum bands, and communicating based on the first cell ID and the second cell ID. In some cases, the method may include determining a cell ID associated with a downlink transmission in an uplink radio frequency spectrum band, and receiving the downlink transmission in a subframe of the uplink radio frequency spectrum band. The downlink transmission may be based on the cell ID and a format of a physical uplink shared channel (PUSCH), and may include an eight layer single-user multiple-input multiple-output (SU-MIMO) transmission.

公开(公告)号：US10687316B2

公开(公告)日：2020-06-16

申请号：US14799870

申请日：2015-07-15

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal

IPC: H04W72/04 ,  H04L5/00 ,  H04B17/309 ,  H04L1/18 ,  H04L5/14

Abstract: The present disclosure relates to one or more techniques for enabling component carriers for multi-carrier wireless communication. A capability of a UE or base station to support more than five downlink component carriers may be identified and indicated. A multi-carrier configuration, which may include more than five component carriers may be received. The multi-carrier configuration may include a first group of component carriers and a second group of component carriers. A first physical uplink control channel (PUCCH), a second PUCCH, or a combination of the first PUCCH and the second PUCCH, may be transmitted. The first PUCCH may be associated with the plurality of downlink component carriers of the first group, and the second PUCCH may be associated with the at least one downlink component carrier of the second group.

公开(公告)号：US20200186310A1

公开(公告)日：2020-06-11

申请号：US16702369

申请日：2019-12-03

Applicant: QUALCOMM Incorporated

Inventor： Wei Yang ,  Yi Huang ,  Alexandros Manolakos ,  Wanshi Chen ,  Peter Gaal ,  Gokul Sridharan ,  Juan Montojo

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

Abstract: Methods, systems, and devices for wireless communications are described. A transmitting device may identify multiple demodulation reference signal (DMRS) symbols corresponding to multiple DMRS ports of a multiple input multiple output configuration. The transmitting device may generate multiple phase-rotated and precoded DMRS symbols by applying an orthogonal cover code, a phase rotation scheme, and a precoding matrix to the identified DMRS symbols. The transmitting device may map the phase-rotated and precoded DMRS symbols to time-frequency resources corresponding to multiple antenna ports, and transmit a DMRS based on the mapped phase-rotated and precoded DMRS symbols. The transmitting device may transmit the DMRS using multiple antennas that correspond to the antenna ports.