公开(公告)号：US10142984B2

公开(公告)日：2018-11-27

申请号：US14978547

申请日：2015-12-22

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Yongbin Wei ,  Peter A. Barany

IPC: H04W72/04 ,  H04W16/10 ,  H04L5/00 ,  H04J11/00 ,  H04W16/14

Abstract: Methods and apparatus for providing wireless communications using subframe partitioning are disclosed. Two or more base stations may be allocated subframes in a radio frame. All or part of the subframe allocation may be provided to the associated user equipment (UEs), which may use it to determine signal metrics during assigned subframes for an associated base station.

公开(公告)号：US10129858B2

公开(公告)日：2018-11-13

申请号：US14951393

申请日：2015-11-24

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Aleksandar Damnjanovic ,  Onkar Jayant Dabeer ,  Peter Gaal ,  Wanshi Chen ,  Shimman Arvind Patel ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04W4/00 ,  H04W72/04 ,  H04W28/02 ,  H04W72/14 ,  H04W74/08 ,  H04L1/18 ,  H04W74/00 ,  H04L5/00 ,  H04W76/27 ,  H04J11/00 ,  H04W72/12 ,  H04W74/02

Abstract: Certain aspects relate to methods and apparatus for latency reduction for UEs in a RRC connected mode. During contention-based uplink access by groups of UEs within a subframe, an eNB may decode the received uplink transmission based, at least in part, on the assigned group of resources assigned to the UE and used for transmission. Additional orthogonalization techniques such as reduced TTI size can be used to reduce collisions among different users performing contention-based transmissions. Furthermore, when the eNB fails to successfully decode the uplink transmission, the eNB may identify the UE that sent the uplink transmission based on a detected reference signal and may transmit an uplink assignment to the identified UE.

公开(公告)号：US10104565B2

公开(公告)日：2018-10-16

申请号：US14565063

申请日：2014-12-09

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L5/00 ,  H04W24/10 ,  H04W16/14 ,  H04W74/08 ,  H04W84/12

Abstract: Channel state information (CSI) feedback in long term evolution (LTE) and LTE-Advanced (LTE-A) networks including unlicensed spectrum is disclosed in which a base station obtains clear channel assessment (CCA) result information from neighboring base stations, either directly or by determining such results from measurement or reports from user equipment (UE) served by the base station. The base station may then generate control signaling based on the CCA result information for transmission to the one or more UEs served by the base station.

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：US10098099B2

公开(公告)日：2018-10-09

申请号：US15005289

申请日：2016-01-25

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Aleksandar Damnjanovic ,  Hao Xu ,  Shimman Arvind Patel ,  Peter Gaal

IPC: H04J3/00 ,  H04W72/04 ,  H04L1/16 ,  H04L1/18

Abstract: Certain aspects of the present disclosure provide techniques that may be used for low latency communications. For example, aspects allow a single group acknowledgement to be used to acknowledge a plurality of low latency transmissions. An exemplary method generally includes receiving, from a base station, a plurality of downlink channel transmissions, wherein each of the downlink channel transmissions is sent using a first transmission time interval (TTI) that is reduced relative to a legacy TTI and providing, in a single uplink channel transmission sent using a second TTI that is larger than the first TTI, a group acknowledgement indicating whether or not the downlink channel transmissions were successfully received by a UE.

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：US20180227804A1

公开(公告)日：2018-08-09

申请号：US15886660

申请日：2018-02-01

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Juan Montojo ,  Junyi Li ,  Xiaoxia Zhang ,  Taesang Yoo

IPC: H04W28/26 ,  H04W72/04 ,  H04W16/14 ,  H04W72/12

Abstract: Wireless communications systems and methods related to spectrum pooling among multiple carriers or operators for peak rate performance improvement are provided. A first wireless communication device communicates, with a second wireless communication device, a first reservation request signal to reserve a transmission period in a frequency spectrum shared by a first operator and a second operator. The first wireless communication device and the second wireless communication device are associated with the first operator and a first cell. The first reservation request signal carries a request signature sequence associated with the first cell. The first wireless communication device communicates, with the second wireless communication device, data during the transmission period in the frequency spectrum shared by the first and second operators.

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：US10020911B2

公开(公告)日：2018-07-10

申请号：US14984127

申请日：2015-12-30

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Tao Luo ,  Aleksandar Damnjanovic

IPC: H04W16/02 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04L1/00 ,  H04L5/00 ,  H04W72/08

CPC classification number: H04L1/0003 ,  H04L5/0073 ,  H04W72/042 ,  H04W72/0426 ,  H04W72/0446 ,  H04W72/048 ,  H04W72/082 ,  H04W72/12 ,  H04W72/1278 ,  H04W84/045

Abstract: Systems, method and devices utilized in wireless communication may include creating, scheduling and/or using a transmission having at least one quasi-ABS which includes at least one macro set corresponding to a designated sector of a plurality of sectors in a macro node. Such subframes may be formed and partitioned to provide for a partition which may be used by a range expansion resource, such as a pico node or user entity.

公开(公告)号：US10014970B2

公开(公告)日：2018-07-03

申请号：US15041635

申请日：2016-02-11

Applicant: QUALCOMM Incorporated

Inventor： Xiaoxia Zhang ,  Vikas Jain ,  Srinivas Yerramalli ,  Tao Luo ,  Aleksandar Damnjanovic ,  Kiran Kumar Somasundaram

IPC: H04W4/00 ,  H04J11/00 ,  H04W74/08 ,  H04W16/14 ,  H04W72/12

CPC classification number: H04J11/0056 ,  H04W16/14 ,  H04W72/1268 ,  H04W74/0808

Abstract: Mitigation of inter-base station resynchronization loss in wireless networks including contention-based shared frequency spectrum is discussed. Aspects of such mitigation provide for base stations entering into an idle mode when a transmission opportunity occurs in a radio frame of the next resynchronization occasion. Additional aspects provide for the base station to signal a flexible listen before talk (LBT) frame length to the user equipment (UE), either with or without explicit signaling of the downlink-uplink division. Further aspects provide for the base station to signal a reset indication to UEs that will prompt the UEs to monitor for downlink channel reserving signals prior to the current LBT frame ending by the resynchronization occasion.