公开(公告)号：US10098140B2

公开(公告)日：2018-10-09

申请号：US15154344

申请日：2016-05-13

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Aleksandar Damnjanovic ,  Jing Sun ,  Taesang Yoo ,  Xiaoxia Zhang ,  Durga Prasad Malladi

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/04 ,  H04B7/06 ,  H04W72/08 ,  H04W52/00 ,  H04W74/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may identify a transmission opportunity duration and an allocation for downlink and uplink transmissions, then broadcast a channel reservation request transmission. The broadcast may be sent using unlicensed radio frequency spectrum over a channel that includes multiple-sub-bands. The channel reservation transmission may include the identified duration, allocation, and a channel state information (CSI) request. User equipments (UEs) may receive the broadcast, and respond with a channel reservation response transmission that includes a CSI report, a transmit identity, or an interference threshold indicator. In some cases, some or all of the UEs may transmit a sounding reference signal (SRS) in response to an SRS request that is broadcast by the base station. The base station may schedule uplink and/or downlink transmissions to at least a subset of the multiple UEs based on the channel reservation response and/or SRS.

公开(公告)号：US20180249505A1

公开(公告)日：2018-08-30

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 ,  H04B17/327 ,  H04L5/00 ,  H04W56/00 ,  H04B17/336 ,  H04B17/318 ,  H04W16/14

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：US20180220451A1

公开(公告)日：2018-08-02

申请号：US15936071

申请日：2018-03-26

Applicant: QUALCOMM Incorporated

Inventor： Naga Bhushan ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Peter Gaal ,  Durga Prasad Malladi

IPC: H04W74/08 ,  H04L5/00 ,  H04W36/22

CPC classification number: H04W74/08 ,  H04L5/0091 ,  H04W36/22 ,  H04W74/0808

Abstract: Methods, systems, and devices are described contention-based channel access procedures that may enhance efficiency in communications using unlicensed spectrum. A time period may be identified during which base stations perform contention-based downlink channel access procedures for access to a channel in an unlicensed spectrum. The base stations may be coordinated such that different base stations may seek channel access during different time intervals during the time period. Contention-based uplink channel access procedures for UEs may then be modified to favor one or more UEs that are associated with a base station that has won channel access.

公开(公告)号：US10009926B2

公开(公告)日：2018-06-26

申请号：US14736946

申请日：2015-06-11

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Miguel Griot ,  Hao Xu ,  Durga Prasad Malladi ,  Yongbin Wei

IPC: H04W74/08 ,  H04W4/70 ,  H04W76/27

CPC classification number: H04W74/0833 ,  H04W4/70 ,  H04W76/27

Abstract: Certain aspects of the present disclosure generally relate to techniques for connectionless access by a wireless device. Such connectionless access may allow for the transmission of data without the overhead associated with establishing conventional connected access (e.g., radio resource control (RRC) connection) to a network. As a result, a device with relatively little data to transmit, such as a machine type communications (MTC) device, may be able to efficiently exit an idle mode, transmit the data during a connectionless access, and subsequently return to idle mode in a shorter period of time than conventional methods.

公开(公告)号：US10009925B2

公开(公告)日：2018-06-26

申请号：US14873079

申请日：2015-10-01

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W74/08 ,  H04B17/318 ,  H04B17/336 ,  H04W16/14 ,  H04W56/00 ,  H04L5/00 ,  H04B17/327

CPC classification number: H04W74/0816 ,  H04B17/318 ,  H04B17/327 ,  H04B17/336 ,  H04L5/00 ,  H04W16/14 ,  H04W56/0095

Abstract: The disclosure provides for control plane measurements in a wireless device. The wireless device may perform, on signals received over an unlicensed spectrum across multiple sub-frames, radio resource management (RRM) measurements of a cell. The wireless device may identify one or both of a first subset of the RRM measurements associated with a first subset of the sub-frames including opportunistic transmissions and a second subset of the RRM measurements associated with a second subset of the sub-frames including guaranteed transmissions. The wireless device may determine one or more RRM measurement values based on one or both of the first subset of the RRM measurements and the second subset of the RRM measurements. The wireless device may similarly perform radio link management (RLM) measurements and determine RLM measurement values based on the first and second subsets. The wireless device may also use timers for uplink transmissions to detect radio link failures.

公开(公告)号：US09998960B2

公开(公告)日：2018-06-12

申请号：US14944131

申请日：2015-11-17

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Durga Prasad Malladi ,  Yongbin Wei ,  Wanshi Chen ,  Peter Gaal ,  Tao Luo ,  Naga Bhushan

IPC: H04W4/00 ,  H04W36/00 ,  H04W52/02 ,  H04W36/08 ,  H04W56/00

CPC classification number: H04W36/0061 ,  H04W36/0055 ,  H04W36/0072 ,  H04W36/08 ,  H04W52/0206 ,  H04W56/001 ,  H04W76/10 ,  H04W76/27 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a second base station. The second base station receives a measurement report and a cell identifier, associated with a first base station, from a UE. The second base station determines, based on the cell identifier, that the first base station is in a dormant state. The second base station sends an activation request to the first base station, based on the measurement report, to prompt the first base station to transition from the dormant state to an active state. The second base station further includes handing off the UE to the first base station.

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：US09949315B2

公开(公告)日：2018-04-17

申请号：US14553789

申请日：2014-11-25

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W76/04 ,  H04W16/14 ,  H04W74/08 ,  H04W72/04 ,  H04W36/22

CPC classification number: H04W76/28 ,  H04W16/14 ,  H04W36/22 ,  H04W72/0426 ,  H04W74/08

Abstract: Techniques are described for wireless communication. One method includes monitoring, by a first base station of a first operator, for clear channel assessment (CCA) exempt transmission (CET) timing information of a second base station of a second operator; identifying transmission timings of CETs of the second base station of the second operator based at least in part on the monitoring; and discontinuing transmissions of the first base station of the first operator during the transmission timings of the CETs of the second base station of the second operator. Transmissions of the second base station of the second operator may be asynchronous to transmissions of the first base station of the first operator.

公开(公告)号：US09924509B2

公开(公告)日：2018-03-20

申请号：US14494779

申请日：2014-09-24

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W28/18 ,  H04L5/00

CPC classification number: H04W72/0446 ,  H04L5/003 ,  H04W28/18

Abstract: Certain aspects of the present disclosure relate to techniques for configuring an adaptive frame structure for wireless communications systems using unlicensed radio frequency spectrum. A base station (BS) may determine whether another device is transmitting on a channel in the unlicensed radio frequency spectrum or one or more other network conditions pertaining to the channel, determine a frame structure from a plurality of frame structures used for data communications based at least in part on the one or more network conditions, wherein each of the plurality of frame structures has a different frame duration, and communicate with a user equipment (UE) using the determined frame structure. A UE may determine a frame structure from a plurality of frame structures used for data communications, wherein each of the plurality of frame structures has a different frame duration, and communicate with a BS using the determined frame structure.

公开(公告)号：US09883404B2

公开(公告)日：2018-01-30

申请号：US14096686

申请日：2013-12-04

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad Malladi ,  Naga Bhushan ,  Tao Luo ,  Yongbin Wei

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

CPC classification number: H04W16/14 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0092 ,  H04L5/14 ,  H04L27/0006 ,  H04W28/08 ,  H04W72/1231 ,  H04W72/1278 ,  H04W74/0808

Abstract: Methods, systems, and apparatuses are described for wireless communications. In one method, an uplink grant may be received over a licensed spectrum. A clear channel assessment (CCA) may be performed in response to the uplink grant to determine availability of an unlicensed spectrum. The CCA may be performed prior to a transmission associated with the uplink grant. In another method, scheduling information may be received over a licensed spectrum. An uplink grant may be transmitted over the licensed spectrum. The uplink grant may be based at least in part on the scheduling information. The uplink grant may be configured to trigger a CCA to determine availability of an unlicensed spectrum prior to a transmission associated with the uplink grant.