公开(公告)号：US20180132245A1

公开(公告)日：2018-05-10

申请号：US15698468

申请日：2017-09-07

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Wanshi Chen

IPC: H04W72/04

CPC classification number: H04W72/0473 ,  H04W16/14 ,  H04W28/0278 ,  H04W52/04 ,  H04W52/146 ,  H04W52/221 ,  H04W52/38 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/1289 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may apply transmission power commands and transmit uplink control information based on a received two-stage grant. For example, a UE may receive a grant including a transmit power command that may be applied to a transmission time interval (TTI) during which the UE transmits. The UE may also apply the transmit power command to a TTI that is a number of TTIs after the grant is received. In some cases, the UE may receive a trigger as part of a two-stage grant, and the application of the transmit power command may be based on the trigger. In another example, the UE may identify uplink control information based on a time delay between a number of TTIs. In some cases, a UE may identify control channel elements based on a DCI type.

公开(公告)号：US09967752B2

公开(公告)日：2018-05-08

申请号：US14454400

申请日：2014-08-07

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W16/14 ,  H04L5/00 ,  H04L27/00 ,  H04B1/713 ,  H04W36/22

CPC classification number: H04W16/14 ,  H04B1/713 ,  H04L5/001 ,  H04L5/0012 ,  H04L5/0041 ,  H04L27/0006 ,  H04W36/22

Abstract: Methods, systems, and apparatuses are described for wireless communications, in which transmission of common information to two or more receivers over unlicensed spectrum may be provided. The common information may be transmitted over a number (e.g., a set) of different carrier frequencies of the unlicensed spectrum. A staggering pattern may be employed to transmit all or a part of the common information across each of the carrier frequencies in the set of carrier frequencies. The detection of the information on one of the carrier frequencies may provide information that may be used to derive the staggering pattern. The duration of the common information transmission on each of the carrier frequencies may be selected such that a clear channel assessment (CCA) to determine availability of the unlicensed spectrum is not required.

公开(公告)号：US20180124790A1

公开(公告)日：2018-05-03

申请号：US15724951

申请日：2017-10-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli

IPC: H04W72/04 ,  H04W16/14

CPC classification number: H04W72/0453 ,  H04W16/14 ,  H04W72/048 ,  H04W74/0808 ,  H04W74/0816

Abstract: A wireless communication system may allocate uplink resources to configure coexisting interleaved and contiguous uplink transmissions. Operation using different waveform types may address bandwidth occupancy requirements, power spectral density (PSD) limitations, etc. A carrier bandwidth may be split into regions allocated for interlaced resource allocations and contiguous resource allocations for frequency division multiplexing (FDM) based coexistence. To achieve coexistence of such waveform types, a base station may indicate a waveform type, a transmission carrier bandwidth or channel, and a resource block allocation (e.g., an interlace pattern, certain ranges within the carrier bandwidth, etc.) for uplink transmissions. In some cases, channel contention procedures (e.g., Listen Before Talk (LBT)) and power constraints (e.g., power spectral density (PSD) limitations) may be based on the waveform type associated with the uplink transmission. A base station may allocate frequency resources of an uplink TTI to multiple UEs, which may operate according to different waveform types.

公开(公告)号：US09949169B2

公开(公告)日：2018-04-17

申请号：US15149752

申请日：2016-05-09

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Wanshi Chen ,  Peter Gaal

IPC: H04W4/00 ,  H04W28/12 ,  H04J11/00 ,  H04L5/00 ,  H04W72/04 ,  H04W72/12 ,  H04L27/00 ,  H04W16/14 ,  H04W74/08

CPC classification number: H04W28/12 ,  H04J11/00 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0091 ,  H04L27/0006 ,  H04W16/14 ,  H04W72/042 ,  H04W72/1289 ,  H04W74/006 ,  H04W74/0808

Abstract: Control flow enhancement for LTE-U operation. Aspects include enhancements to control flow processing for floating TTI operation for unlicensed cells including ePDCCH processing, aperiodic CSI reporting, DRX operation, and extended TTIs at the end of a transmission burst. The described aspects also include enhancements for reference signal configuration for unlicensed cells, processing of joint grants for multiple unlicensed cells, ePDCCH processing for partial subframes, and multi-channel DRS operation.

公开(公告)号：US20180069589A1

公开(公告)日：2018-03-08

申请号：US15637178

申请日：2017-06-29

Applicant: QUALCOMM Incorporated

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

IPC: H04B1/403 ,  H04B1/26 ,  H04B1/00 ,  H04B7/24 ,  H04B1/707 ,  H04B7/26

CPC classification number: H04B1/406 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/006 ,  H04B1/26 ,  H04B1/707 ,  H04B7/24 ,  H04B7/2634 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0064 ,  H04L5/0069 ,  H04L5/0091 ,  H04L27/0006 ,  H04W16/14 ,  H04W72/0406 ,  H04W72/044 ,  H04W72/048

Abstract: Methods, systems, and devices for wireless communication are described. Resources for narrowband communication in an unlicensed radio frequency spectrum band may be configured and allocated based on resource availability, regulatory constraints, and device capability or category. A narrowband wireless device, such as a machine type communication device or other relatively low complexity device, may communicate using one or more narrowband carriers, which may occupy between one tone and multiple resource blocks in an unlicensed spectrum band (e.g., any number of resources between one (1) tone and multiple resource blocks (RBs)). Different device types may thus be configured differently as they move between geographic regions. The base station may then communicate with the narrowband mobile device based on the resource allocation and the carrier configuration.

公开(公告)号：US20180049206A1

公开(公告)日：2018-02-15

申请号：US15609815

申请日：2017-05-31

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Peter Gaal ,  Xiaoxia Zhang

IPC: H04W72/04 ,  H04W16/14 ,  H04W72/10 ,  H04W74/08

CPC classification number: H04W72/0473 ,  H04W16/14 ,  H04W52/325 ,  H04W52/346 ,  H04W52/367 ,  H04W52/38 ,  H04W72/0413 ,  H04W72/10 ,  H04W74/0816

Abstract: Methods, systems, and devices for wireless communication are described that provide for power allocation across different carriers using shared and dedicated radio frequency spectrum for a power-limited UE. In cases where a power-limited UE is to transmit control information, power allocation across different carriers may be determined based on one or more of a number of parameters, such as a type of control channel for transmission of control information, an outcome of an LBT procedure for a carrier using shared radio frequency spectrum, a timing of the LBT procedure, one or more other concurrent transmissions, or any combination thereof.

公开(公告)号：US20170280476A1

公开(公告)日：2017-09-28

申请号：US15467697

申请日：2017-03-23

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Aleksandar Damnjanovic ,  Peter Gaal ,  Juan Montojo ,  Tao Luo

IPC: H04W72/12 ,  H04W74/08 ,  H04W16/14 ,  H04W72/04 ,  H04W72/14

CPC classification number: H04W72/1268 ,  H04W16/14 ,  H04W72/0453 ,  H04W72/14 ,  H04W74/0808 ,  H04W84/12

Abstract: Techniques are described for wireless communication. One method includes identifying a first set of resources for a first uplink transmission. The first set of resources is based on a first set of frequency resource interlaces and a first set of frequency resource interlace segments. Each frequency resource interlace segment of the first set of frequency resource interlace segments includes a portion of resources of the frequency resource interlaces of the first set of frequency resource interlaces. The method also includes communicating on an uplink using the first set of resources.

公开(公告)号：US09762361B2

公开(公告)日：2017-09-12

申请号：US14618606

申请日：2015-02-10

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Wanshi Chen ,  Tao Luo

IPC: H04L5/00 ,  H04W72/04 ,  H04W52/02 ,  H04J11/00 ,  H04W76/06

CPC classification number: H04L5/0032 ,  H04J11/0059 ,  H04L5/0098 ,  H04W52/0216 ,  H04W72/0426 ,  H04W72/0446 ,  H04W76/38 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

Abstract: Configuration of secondary cell timers is disclosed for long term evolution (LTE)/LTE-Advanced (LTE-A) having unlicensed spectrum. In order to save power at a user equipment (UE), secondary cells may be deactivated by configuring a secondary cell deactivation timer. Because of transmission uncertainties when operating in LTE/LTE-A systems having unlicensed spectrum, the deactivation timers for unlicensed spectrum may be provided in a clear channel assessment (CCA)-dependent configuration, a CCA-independent configuration, or an alternative threshold-driven configuration of both CCA-dependent and CCA-independent configurations.

公开(公告)号：US20170195081A1

公开(公告)日：2017-07-06

申请号：US15463825

申请日：2017-03-20

Applicant: QUALCOMM Incorporated

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

IPC: H04L1/00 ,  H04L1/18 ,  H04L1/08

Abstract: Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger-size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal.

公开(公告)号：US09634802B2

公开(公告)日：2017-04-25

申请号：US14471138

申请日：2014-08-28

Applicant: QUALCOMM Incorporated

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

IPC: H03M13/00 ,  H04L1/00 ,  H04L1/18 ,  H04L5/00 ,  H04L5/14 ,  H04L27/34

CPC classification number: H04L1/0006 ,  H04L1/0034 ,  H04L1/0071 ,  H04L1/08 ,  H04L1/1893 ,  H04L5/001 ,  H04L5/0044 ,  H04L5/0073 ,  H04L5/1469 ,  H04L27/3488

Abstract: Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger-size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal.