公开(公告)号：US09955478B2

公开(公告)日：2018-04-24

申请号：US15080393

申请日：2016-03-24

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic

IPC: H04W4/00 ,  H04W72/04 ,  H04W72/12 ,  H04L1/18 ,  H04W72/14 ,  H04W76/04

CPC classification number: H04W72/0446 ,  H04L1/1812 ,  H04W72/0453 ,  H04W72/1278 ,  H04W72/14 ,  H04W76/27

Abstract: Techniques are described for wireless communication. A first method includes receiving a semi-static partial subframe configuration and a corresponding partial subframe identifier; receiving a grant for a partial subframe, the grant identifying the partial subframe identifier; and receiving data scheduled for the partial subframe over a shared radio frequency spectrum band based at least in part on the semi-static partial subframe configuration. A second method includes monitoring a plurality of symbol periods for at least one channel reservation signal transmitted over a shared radio frequency spectrum band, where the at least one channel reservation signal is encoded based at least in part on each symbol period of the plurality of symbol periods; and receiving a downlink transmission over the shared radio frequency spectrum band, where the downlink transmission follows the plurality of channel reservation signals.

公开(公告)号：US20180110052A1

公开(公告)日：2018-04-19

申请号：US15837463

申请日：2017-12-11

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W74/08 ,  H04L27/26 ,  H04W72/12

CPC classification number: H04W72/0453 ,  H04L27/2601 ,  H04W72/0413 ,  H04W72/1268 ,  H04W74/0833

Abstract: Techniques for wireless communications over a shared radio frequency spectrum band, may include techniques for transmitting uplink data transmissions using allocated uplink resources. Allocated uplink resources may include an uplink channel comprising a number of allocated interlaces of resource blocks (RBs) for use by a user equipment (UE). An incoming data stream may be processed and data separated into each of the allocated interlaces of RBs for the UE. Such separation may be through demultiplexing the data stream to obtain data for the allocated interlaces of RBs. The demultiplexed data may be mapped onto associated resource elements associated with the allocated interlaces of RBs, and transmitted. Different types of uplink channels, such as a physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH) and/or a physical random access channel (PRACH) may be allocated to interlaces of RBs in one or more subframes of a transmitted radio frame.

公开(公告)号：US09949275B2

公开(公告)日：2018-04-17

申请号：US14492437

申请日：2014-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/08 ,  H04W16/14 ,  H04L5/00 ,  H04W74/08 ,  H04W72/04 ,  H04L5/14

CPC classification number: H04W72/082 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04L5/14 ,  H04W16/14 ,  H04W72/042 ,  H04W74/0808

Abstract: Uplink control channel management is disclosed for LTE/LTE-A communication systems with unlicensed spectrum in which two or more physical resource blocks (PRBs) are allocated for uplink control channel transmission. The uplink control information (UCI) payload may be determined based on clear channel assessment (CCA) information associated with carriers scheduled for transmission of the UCI data. With the UCI payload determined, two or more uplink control channel messages may be generated according to at least one control channel format, wherein uplink control channel messages include the UCI payload. These generated uplink control channel messages may then be transmitted over the allocated PRBs.

公开(公告)号：US20180092043A1

公开(公告)日：2018-03-29

申请号：US15710603

申请日：2017-09-20

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal

IPC: H04W52/14 ,  H04L5/00 ,  H04W52/34 ,  H04W28/02 ,  H04W16/16 ,  H04W28/26 ,  H04W72/04 ,  H04W72/14 ,  H04W74/08

CPC classification number: H04W52/146 ,  H04L5/005 ,  H04W16/16 ,  H04W28/021 ,  H04W28/26 ,  H04W52/343 ,  H04W72/0413 ,  H04W72/14 ,  H04W74/0808 ,  H04W74/0816

Abstract: Handling transmissions in enhanced license assisted access (eLAA) networks is discussed. Specifically, when pauses occur in transmissions on contention-based shared channels involved in eLAA communications, various procedures may be used to restart transmissions on the contention-based shared channels on the uplink when the original channel occupancy was reserved by a serving base station.

公开(公告)号：US09900029B2

公开(公告)日：2018-02-20

申请号：US14453428

申请日：2014-08-06

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Srinivas Yerramalli ,  Durga Prasad Malladi

IPC: H04B1/00 ,  H04B1/12 ,  H04B1/7107 ,  H04J11/00

CPC classification number: H04B1/006 ,  H04B1/12 ,  H04B1/7107 ,  H04J11/004

Abstract: Techniques are described for wireless communications. In one example, multiple signals including at least a wireless local area network (WLAN) signal and a cellular signal may be received over a bandwidth of an unlicensed radio frequency spectrum band. Digital samples of the signals may be stored in a buffer. At least a portion of the WLAN signal may be reconstructed from the stored digital samples and removed from the stored digital samples before the contents of the buffer are converted to the frequency domain for demodulation and decoding of the cellular signal by a cellular receiver. In another example, multiple signals may be received over a bandwidth of an unlicensed radio frequency spectrum band, and it may be determined whether to apply codeword-level interference cancelation (CWIC) or symbol-level interference cancelation (SLIC) to remove an interference signal in the multiple signals.

公开(公告)号：US09893852B2

公开(公告)日：2018-02-13

申请号：US14460996

申请日：2014-08-15

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Naga Bhushan

IPC: H04W16/14 ,  H04L5/00 ,  H04L27/00 ,  H04L5/14

CPC classification number: H04L5/0044 ,  H04L5/001 ,  H04L5/1469 ,  H04L27/0006 ,  H04W16/14

Abstract: Methods, systems, and devices are described for clear channel assessments (CCAs) on multiple component carriers transmitted using an unlicensed or shared spectrum. A set of component carriers may be identified for transmission of communications signals on the unlicensed or shared spectrum, and a CCA for one component carrier of the set may be staggered to occur at a different time than a CCA for a different component carrier of the setoff component carriers. The staggering of CCAs may allow for CCA to be performed at different times for different component carriers, thus increasing opportunities to gain channel access in the unlicensed or shared spectrum.

公开(公告)号：US09860776B2

公开(公告)日：2018-01-02

申请号：US14743825

申请日：2015-06-18

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Kiran Kumar Somasundaram ,  Durga Prasad Malladi ,  Naga Bhushan ,  Yongbin Wei ,  Aleksandar Damnjanovic ,  Wanshi Chen ,  Xiaoxia Zhang ,  Hao Xu ,  Ravi Teja Sukhavasi

IPC: H04W24/08 ,  H04W74/08

CPC classification number: H04W24/08 ,  H04W74/0808

Abstract: The present disclosure provides methods and apparatuses for multi-carrier transmissions over adjacent channels that reduce self-jamming due to asymmetric interference. In an aspect, a large bandwidth load-base equipment (LBE) carrier may be provided such that CCA is performed jointly over the entire bandwidth. In another aspect, additional CCA timeslots may be used to synchronize the two carriers. In a further aspect, an extended CCA may be performed on a primary unlicensed carrier while a simple CCA may be performed on a secondary unlicensed carrier. In yet another aspect, LBE may be deployed on some carriers while frame-base equipment (FBE) may be deployed on other carriers.

公开(公告)号：US20170142694A1

公开(公告)日：2017-05-18

申请号：US15347382

申请日：2016-11-09

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Tao Luo ,  Peter Gaal

IPC: H04W72/04 ,  H04L5/00 ,  H04W16/14 ,  H04L1/18

Abstract: Techniques are provided that enable signaling of physical layer parameters in a shared radio frequency spectrum band or a dedicated radio frequency spectrum band (or any available radio frequency spectrum band). One or more physical layer channels may be used to transmit physical layer parameters, and different portions of the channel(s) may carry physical layer information for different groups of UEs. A base station may configure a UE into a UE group that monitors particular channel resources based on the UE group. In this manner, a base station may transmit physical layer parameters that may be received by a UE for receiving wireless communications for one or more subframe. A base station may transmit physical layer parameters to be monitored by the use using a physical hybrid automatic repeat request (HARD) indicator channel (PHICH), a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), or combinations thereof.

公开(公告)号：US09648500B2

公开(公告)日：2017-05-09

申请号：US14334151

申请日：2014-07-17

Applicant: QUALCOMM Incorporated

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

IPC: H04W16/14 ,  H04W72/04 ,  H04L5/00 ,  H04L27/00

CPC classification number: H04W16/14 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0073 ,  H04L27/0006 ,  H04W72/0446 ,  H04W72/0453

Abstract: Techniques are described for wireless communications. A first subframe structure having a first subframe duration for communicating in a first carrier may be determined. A second subframe structure having a second subframe duration for communicating in a second carrier may also be determined. At least the second subframe structure having the second subframe duration may be used to communicate with at least one node.

公开(公告)号：US20170111931A1

公开(公告)日：2017-04-20

申请号：US15246005

申请日：2016-08-24

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Maarten Menzo Wentink ,  Srinivas Yerramalli ,  Qingsi Wang ,  Yongbin Wei ,  Juan Montojo

IPC: H04W74/08 ,  H04W16/14

CPC classification number: H04W74/0825 ,  H04L5/0055 ,  H04W16/14 ,  H04W74/0858 ,  H04W84/12 ,  H04W88/06

Abstract: Detection and reporting techniques for collisions between transmitters of two different radio access technologies (RATs) transmitting in a shared radio frequency spectrum band is described. The collision may occur following a listen-before-talk procedure but prior to transmission of data, and may not affect the reception of the transmitted data. Collisions may be detected using for example, energy sensing, preamble or ready-to-send (RTS) signal detection, or unsuccessful decoding of all or part of a channel reservation signal. A transmitting device may determine a collision has occurred by detecting an energy level during a preamble transmission is greater than a threshold level or by detecting that an energy level during a transmission gap of a time-domain energy pattern is above a threshold level. A receiving device, such as a user equipment (UE), that detects the collision may report the collision to the transmitter.