公开(公告)号：US10284999B2

公开(公告)日：2019-05-07

申请号：US15591994

申请日：2017-05-10

Applicant: QUALCOMM Incorporated

Inventor： Akash Kumar ,  Amit Jain ,  Sai Pradeep Venkatraman ,  Srinivas Yerramalli

IPC: H04W4/02 ,  H04B17/318 ,  G01S5/02

Abstract: A mobile device can send and receive signals in a dedicated frequency band and receive signals in a separate frequency band separate from the dedicated frequency band. The mobile device can send one or more frequency band compatibility combinations each including first and second frequency bands, the first frequency band being in the separate frequency band and the second frequency band being in the dedicated frequency. The mobile device can listen, based on a received neighbor list, for a first signal that has a frequency in the first frequency band and for a second signal that has a frequency in the second frequency band. The mobile device can determine, based on the first signal, ranging information indicative of a range from the mobile device to a source of the first signal, e.g., to obtain improved accuracy ranging information.

公开(公告)号：US20190124656A1

公开(公告)日：2019-04-25

申请号：US16223100

申请日：2018-12-17

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

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：US10251197B2

公开(公告)日：2019-04-02

申请号：US15198713

申请日：2016-06-30

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Xiaoxia Zhang ,  Tao Luo

IPC: H04W74/08 ,  H04L5/00 ,  H04W74/00 ,  H04W16/14

Abstract: Uplink control information may not be transmitted if a CCA of the unlicensed SCC fails. Thus, the present disclosure provide a solution in which uplink control information for an unlicensed SCC may still be transmitted when a CCA of the unlicensed SCC fails. In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus generates uplink control information. The apparatus also attempts to perform a CCA of a carrier for an uplink burst. In addition, the apparatus determines a failure of the CCA. In addition, the apparatus performs one of the following when it is determined that the CCA has failed: transmitting the PUCCH transmission on the carrier in a later subframe of the uplink burst, transmitting the PUCCH transmission on the carrier in a different uplink burst, or transmitting the PUCCH transmission on a different carrier.

公开(公告)号：US20190090138A1

公开(公告)日：2019-03-21

申请号：US16194168

申请日：2018-11-16

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Durga Prasad Malladi ,  Naga Bhushan ,  Yongbin Wei ,  Peter Gaal ,  Wanshi Chen ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Ravi Teja Sukhavasi

IPC: H04W16/14 ,  H04L5/00

CPC classification number: H04W16/14 ,  H04L5/0041 ,  H04L5/0051

Abstract: Methods and apparatus for wireless communication are described. A method may include receiving at a user equipment (UE) a number of allocated interlaces for an uplink transmission over a shared spectrum, each of which may include a plurality of non-contiguous resource blocks (RB) of the shared spectrum. In some cases, the number of allocated interlaces is unsupported by joint interlace precoding hardware of the UE and the allocated interlaces may be partitioned into subsets of interlaces which may be a size supported by the joint interlace precoding hardware. Reference signals may be generated for the RBs of the allocated interlaces according to a reference signal sequence based on an ordering of the RBs for the allocated interlaces within the shared spectrum.

公开(公告)号：US20190089443A1

公开(公告)日：2019-03-21

申请号：US16118284

申请日：2018-08-30

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli ,  Tamer Kadous ,  Kaushik Chakraborty

IPC: H04B7/06 ,  H04B7/0404

Abstract: Methods, systems, and devices for wireless communications are described that provide for refinement of receive beam beamforming parameters at a user equipment (UE). A UE may transmit two or more signals in an uplink transmission that have different beamforming parameters. A base station receiving the uplink transmission may measure the two or more signals, and identify a first signal of the two or more signals based at least in part on the measuring. The base station may inform the UE of the identified first signal, which the UE may use to set receive beam beamforming parameters for one or more subsequent downlink transmissions.

公开(公告)号：US20190069228A1

公开(公告)日：2019-02-28

申请号：US16109241

申请日：2018-08-22

Applicant: QUALCOMM Incorporated

Inventor： Rahul Malik ,  Srinivas Yerramalli

IPC: H04W48/16 ,  H04W24/10 ,  H04L5/00 ,  H04W72/04 ,  H04W24/02

Abstract: Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support multi-band operation. Different frequency bands may experience different communication characteristics (e.g., frequency-dependent fading), which may result in undesirable interference patterns and/or coverage gaps. The described techniques provide for discovery procedures for multi-band operation. The discovery procedures may allow for improved throughput, improved energy efficiency, reduced signaling overhead, as well as other benefits for a wireless communications system. Generally, the described techniques provide for efficient discovery reference signal (DRS) transmissions over multiple frequency bands. The timing of the DRS transmissions across the different bands may be related or the DRS transmission timing for each band may be determined independently.

公开(公告)号：US20190037525A1

公开(公告)日：2019-01-31

申请号：US15985061

申请日：2018-05-21

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao Liu ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W64/00 ,  G01S5/10 ,  G01S5/02 ,  H04L5/00 ,  H04B1/7143

Abstract: Methods, systems, and devices for wireless communication that support positioning techniques are described. One method may include receiving a positioning reference signal (PRS) configuration; receiving a plurality of PRS transmissions over a shared radio frequency spectrum from a plurality of base stations; and transmitting a measurement report of the PRS transmissions. The PRS transmissions may be received according to the PRS configuration. Another method may include receiving a discovery reference signal (DRS) transmission from a first base station; decoding a cell identifier of the first base station based on the DRS transmission; determining timing information of the first base station based on the DRS transmission; and transmitting a measurement report of the DRS transmission to a second base station.

公开(公告)号：US10187186B2

公开(公告)日：2019-01-22

申请号：US14869779

申请日：2015-09-29

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/14 ,  H04L1/18 ,  H04W16/14 ,  H04W74/08

Abstract: Systems and methods for uplink transmission scheduling are disclosed. A wireless device may monitor at least two downlink sub-frames for scheduling grants. The wireless device may receive a first uplink scheduling grant in one of the at least two downlink sub-frames for at least a first uplink sub-frame and receive a second uplink scheduling grant in another of the at least two downlink sub-frames for at least the first uplink sub-frame. The wireless device may perform an uplink transmission in the first uplink sub-frame based on one or both of the first uplink scheduling grant and the second uplink scheduling grant. For the uplink transmission, the wireless device may select a most recent uplink scheduling grant or select an uplink scheduling grant received in a downlink sub-frame at least a minimum number of sub-frames before the first uplink sub-frame.

公开(公告)号：US20180323935A1

公开(公告)日：2018-11-08

申请号：US15969536

申请日：2018-05-02

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Jing Sun ,  Wanshi Chen ,  Alberto Rico Alvarino ,  Peter Gaal

IPC: H04L5/00 ,  H04W74/08

CPC classification number: H04L5/0053 ,  H04L5/0094 ,  H04W16/14 ,  H04W72/042 ,  H04W72/0446 ,  H04W74/0808

Abstract: Configuration of downlink and uplink partial subframes in shared radio frequency (RF) spectrum is discussed. The various described aspects provide for different configurations for start and end transmissions from base stations and user equipments (UEs) when transmitting over partial subframes. With downlink initial partial subframes, a uniform puncturing may be used to reduce the number of resource elements (REs) available for downlink transmission without causing the base station to re-precode any of the data. Additional aspect for downlink partial subframe transmission allows for downlink control channels to identify multiple start points within the subframe at short downlink shared channel locations. On the uplink aspect, UEs may be informed with configurations for both full and partial subframe transmissions. The UE will select which configuration to use based on whether it will transmit on full or partial subframes. Additionally, a UE have scheduled or semi-scheduled modes for partial subframe transmissions.

公开(公告)号：US20180310267A1

公开(公告)日：2018-10-25

申请号：US15949978

申请日：2018-04-10

Applicant: QUALCOMM Incorporated

Inventor： Chih-Hao LIU ,  Srinivas Yerramalli ,  Tamer Kadous

IPC: H04W56/00

CPC classification number: H04W56/0005 ,  H04W56/001

Abstract: Methods, systems, and devices for wireless communication are described for synchronization for wideband coverage enhancement. A user equipment (UE) may receive a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in a subframe of a frame. In one example, the PSS may be received in each of a first plurality of consecutive symbols of the subframe. In another example, the SSS may be received in each of a second plurality of consecutive symbols of the subframe, wherein the second plurality of consecutive symbols is after the first plurality of consecutive symbols within the subframe. The UE may synchronize with a base station based at least in part on the PSS and the SSS received in the subframe. Numerous other aspects are provided.