公开(公告)号：US11057175B2

公开(公告)日：2021-07-06

申请号：US16259941

申请日：2019-01-28

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Peter Gaal ,  Hao Xu ,  Wanshi Chen ,  Yongbin Wei ,  Xiao Feng Wang ,  Renqiu Wang ,  Seyed Ali Akbar Fakoorian ,  Madhavan Srinivasan Vajapeyam ,  Alberto Rico Alvarino ,  Juan Montojo

IPC: H04W72/04 ,  H04L5/00 ,  H04J11/00 ,  H04L27/26 ,  H04W56/00

Abstract: Aspects of the present disclosure provide techniques for design of synchronization signals for narrowband operation, which can be used for stand-alone/in-band/guard-band deployment. An example method is provided for operations which may be performed by a base station (BS). The example method generally includes generating a primary synchronization signal (PSS) utilizing a first code sequence and a cover code applied to the first code sequence over a first number of symbols within one or more subframes, generating a secondary synchronization signal (SSS) based on a second code sequence over a second number of symbols within one or more subframes, and transmitting the PSS and the SSS in the first and second subframes to a first type of a user equipment (UE) that communicates on one or more narrowband regions of wider system bandwidth.

公开(公告)号：US11019656B2

公开(公告)日：2021-05-25

申请号：US16853652

申请日：2020-04-20

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Hao Xu ,  Wanshi Chen

IPC: H04L12/28 ,  H04W74/00 ,  H04W74/08 ,  H04L5/14 ,  H04W24/08 ,  H04W72/04 ,  H04W72/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may select a coverage enhancement (CE) level based on a coverage limitation. The UE may then receive system information from a base station indicating an index of CE levels and corresponding physical random access channel (PRACH) configurations, and the UE may transmit a random access preamble using the PRACH configuration for the selected CE level. For example, the UE may transmit the preamble based on a frequency offset that corresponds to the selected CE level. In some cases, the UE and base station may also associate groups of preambles with downlink (DL) CE levels. The UE may select a preamble from a group corresponding to a desired DL CE level for a random access response message. The base station may determine the DL CE level based on the group the preamble was selected from and respond accordingly.

公开(公告)号：US10772021B2

公开(公告)日：2020-09-08

申请号：US14957255

申请日：2015-12-02

Applicant: QUALCOMM Incorporated

Inventor： Jun Wang ,  Ozcan Ozturk ,  Madhavan Srinivasan Vajapeyam ,  Ravindra Manohar Patwardhan ,  Miguel Griot ,  Onkar Jayant Dabeer ,  Jelena Damnjanovic ,  Aleksandar Damnjanovic ,  Taesang Yoo ,  Yongbin Wei ,  Durga Prasad Malladi ,  Ajay Gupta

IPC: H04W36/16 ,  H04W74/08 ,  H04W36/00 ,  H04W36/30 ,  H04W36/36 ,  H04W36/26 ,  H04W8/22 ,  H04W84/04

Abstract: Certain aspects relate to methods and apparatus for discovering whether one or more enhanced capabilities are supported by devices (e.g., user equipment (UE), base station (BS), etc.) in a network. The enhanced capabilities may include, for example, the ability to support certain low latency procedures, enhanced component carrier (eCC) capability, and the like. The devices in the network may perform one or more handover-related procedures (e.g., cell selection/reselection, make-before-break handover, etc.) and/or other procedures (e.g., QoS negotiation, etc.) based, at least in part, on support for the one or more enhanced capabilities.

公开(公告)号：US10721770B2

公开(公告)日：2020-07-21

申请号：US15961606

申请日：2018-04-24

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Aleksandar Damnjanovic ,  Tao Luo ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04W74/08 ,  H04W16/14 ,  H04B17/327 ,  H04L5/00 ,  H04L1/20 ,  H04B17/318 ,  H04B17/336 ,  H04W56/00

Abstract: The disclosure provides for control plane measurements in a wireless device. The wireless device may measure, across multiple sub-frames received over an unlicensed spectrum, received cell-specific reference signals (CRS) from a cell to obtain CRS measurements. The wireless device may identify one or both of a first subset of the CRS measurements associated with a first subset of the sub-frames including opportunistic transmissions and a second subset of the CRS measurements associated with a second subset of the sub-frames including guaranteed transmissions. The wireless device may compute one or both of a first signal to interference plus noise ratio (SINR) value for the first subset of the CRS measurements and a second SINR value for the second subset of the CRS measurements. The wireless device may monitor a radio link condition of the wireless device based at least in part on the first SINR value or the second SINR value.

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：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：US20200186309A1

公开(公告)日：2020-06-11

申请号：US16789191

申请日：2020-02-12

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W76/12 ,  H04W74/00 ,  H04W72/08 ,  H04W72/04 ,  H04W56/00 ,  H04W24/08 ,  H04W76/27

Abstract: Techniques are described for wireless communication. A first method may include receiving at a user equipment (UE) over an unlicensed radio frequency spectrum band an indication of a time window associated with a transmission of a synchronization signal, and monitoring the unlicensed radio frequency spectrum band during the time window to receive a synchronization signal from a base station. A second method may include transmitting an indication of a time window associated with a transmission of a synchronization signal; performing a plurality of clear channel assessments (CCAs) on an unlicensed radio frequency spectrum band during the time window; and transmitting the synchronization signal over the unlicensed radio frequency spectrum band at a transmission time during the time window. The transmission time may be based at least in part on a result of at least one of the CCAs.

公开(公告)号：US10674453B2

公开(公告)日：2020-06-02

申请号：US15643852

申请日：2017-07-07

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Peter Gaal ,  Wanshi Chen ,  Stefan Geirhofer ,  Madhavan Srinivasan Vajapeyam

IPC: H04W52/14 ,  H04W52/24 ,  H04L5/00 ,  H04W52/28 ,  H04W52/54 ,  H04W52/08 ,  H04W52/10 ,  H04W52/36 ,  H04W52/50 ,  H04W52/32 ,  H04W52/46 ,  H04B7/024 ,  H04W74/08

Abstract: Techniques for performing path loss (PL) compensation in coordinated multipoint (CoMP) systems are provided. A method for wireless communications by a user equipment (UE) is provided. The method generally includes selecting, from a plurality of transmission points involved in uplink (UL) coordinated multipoint (CoMP) operations with the UE, a transmission point to associate with for path loss (PL) compensation, and adjusting power of one or more transmissions based on path loss measured based on the selected transmission point.