公开(公告)号：US09801189B2

公开(公告)日：2017-10-24

申请号：US13897214

申请日：2013-05-17

Applicant: QUALCOMM Incorporated

Inventor： Osok Song ,  Aleksandar Damnjanovic ,  Tingfang Ji ,  Taesang Yoo ,  Parag Arun Agashe ,  Madhavan Srinivasan Vajapeyam ,  Yongbin Wei ,  Tao Luo ,  Rajat Prakash ,  Masato Kitazoe

IPC: H04W36/00 ,  H04W72/08

CPC classification number: H04W72/082 ,  H04W72/08

Abstract: Methods and apparatus for partitioning resources for enhanced inter-cell interference coordination (eICIC) are provided. Certain aspects involve broadcasting a message indicating time-domain resource partitioning information (RPI), where a user equipment (UE) may be operating in idle mode. With the RPI, the UE may be able to identify protected resources with reduced/eliminated interference from neighboring cells. The RPI in this broadcasted message may be encoded as a bitmap as an alternative or in addition to enumeration of the U/N/X subframes. Other aspects entail transmitting a dedicated or unicast message indicating the time-domain RPI, where a UE may be operating in connected mode. With the RPI, the UE may be able to determine channel state information (CSI), make radio resource management (RRM) measurements, or perform radio link monitoring (RLM), based on one or more signals from a serving base station during the protected time-domain resources.

公开(公告)号：US20170303236A1

公开(公告)日：2017-10-19

申请号：US15489599

申请日：2017-04-17

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Juan Montojo ,  Taesang Yoo ,  Siddhartha Mallik ,  Andrei Radulescu ,  Chirag Patel ,  Chengjin Zhang

IPC: H04W68/02 ,  H04W72/00 ,  H04W76/04 ,  H04W72/04 ,  H04W88/08 ,  H04W88/02

CPC classification number: H04W68/02 ,  H04W16/14 ,  H04W68/005 ,  H04W72/005 ,  H04W72/0453 ,  H04W74/0808 ,  H04W76/28 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a configuration for enhanced paging to a UE being served by a cell over a shared frequency band. The enhanced paging may include multiple paging intervals for each paging cycle. The UE may enable reception for a paging interval and determine whether the UE receives a downlink transmission. The UE may lengthen a paging interval or enable reception during a second paging interval based in part on determining whether the UE receives a downlink transmission. In some examples, the UE may receive a paging queue status indication indicating that paging information will be transmitted during a paging interval or a later interval, or indicating that no paging information is present at a serving cell.

公开(公告)号：US20170295504A1

公开(公告)日：2017-10-12

申请号：US15453736

申请日：2017-03-08

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Dinkar Vasudevan ,  Jing Sun ,  Juan Montojo

IPC: H04W24/02 ,  H04L1/00 ,  H04W72/14 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04W24/02 ,  H04L1/001 ,  H04L5/0048 ,  H04L5/005 ,  H04W72/042 ,  H04W72/14

Abstract: Methods, systems, and devices for broadcast transmissions in wireless communication are described. A base station may transmit a control reference signal (CRS), a UE-specific reference signal (UERS), and broadcast data (e.g., broadcast physical downlink shared channel (PDSCH) data) in a broadcast downlink transmission. A UE may identify that the CRS and UERS are associated with the broadcast downlink data, and demodulate the broadcast downlink data in the broadcast downlink transmission based at least in part on the CRS and UERS. A UE may estimate a frequency offset based on a phase difference between the CRS and UERS, combine the CRS and UERS for use in a channel estimation, and demodulate the broadcast data based at least in part on the estimated frequency offset and channel estimation. The base station may provide signaling, such as dynamic or semi-static signaling, that indicates presence of both CRS and UERS.

公开(公告)号：US09762426B2

公开(公告)日：2017-09-12

申请号：US15229628

申请日：2016-08-05

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo ,  Lu Zhao

IPC: H04B17/345 ,  H04L27/26 ,  H04L25/02 ,  H04W16/32

CPC classification number: H04L27/2691 ,  H04B15/00 ,  H04B17/345 ,  H04J3/10 ,  H04J11/0056 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0051 ,  H04L5/0062 ,  H04L5/0073 ,  H04L25/0204 ,  H04L25/0224 ,  H04L27/2695 ,  H04W16/32 ,  H04W24/10

Abstract: A method to enhance coverage and/or throughput in a heterogeneous wireless network includes detecting interference between a neighboring cell and a serving cell. The method also includes cancelling the interference using an adaptive technique based on whether the interference has colliding Common Reference Signal (CRS) tones or whether the interference has colliding Dedicated Reference Signal (DRS) tones.

公开(公告)号：US20170223739A1

公开(公告)日：2017-08-03

申请号：US15403862

申请日：2017-01-11

Applicant: QUALCOMM Incorporated

Inventor： Siddhartha Mallik ,  Jing Sun ,  Xiaoxia Zhang ,  Taesang Yoo ,  Yongbin Wei ,  Onkar Jayant Dabeer

IPC: H04W74/08 ,  H04W56/00 ,  H04W16/14

CPC classification number: H04W56/001 ,  H04W16/14 ,  H04W74/0808 ,  H04W74/0891

Abstract: Techniques for synchronization across transmitting nodes of a same public land mobile network (PLMN) operator using a shared radio frequency spectrum band may include initiating, at a first wireless node, a listen-before-talk (LBT) procedure for access to the shared radio frequency spectrum band, and identifying that a second wireless node associated with a same PLMN operator as the first wireless node has won contention for the shared radio frequency spectrum band. The first wireless node may discontinue the LBT procedure and initiate an auxiliary transmission using the shared radio frequency spectrum band concurrently with a primary transmission of the second wireless node.

公开(公告)号：US20170215200A1

公开(公告)日：2017-07-27

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 ,  H04W52/00 ,  H04B7/06 ,  H04W72/08 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W72/1268 ,  H04B7/0626 ,  H04L5/0048 ,  H04W52/00 ,  H04W72/0446 ,  H04W72/0493 ,  H04W72/082 ,  H04W72/1273 ,  H04W74/0808

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：US20170207880A1

公开(公告)日：2017-07-20

申请号：US15369525

申请日：2016-12-05

Applicant: QUALCOMM Incorporated

Inventor： Jing Sun ,  Taesang Yoo ,  Tao Luo

IPC: H04L1/00 ,  H04L1/16 ,  H03M13/35 ,  H03M13/11 ,  H03M13/29 ,  H04L1/08 ,  H03M13/09

CPC classification number: H03M13/255 ,  H03M13/09 ,  H03M13/1102 ,  H03M13/1105 ,  H03M13/2906 ,  H03M13/2957 ,  H03M13/35 ,  H03M13/353 ,  H03M13/356 ,  H03M13/6306 ,  H03M13/6513 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/0061 ,  H04L1/0066 ,  H04L1/007 ,  H04L1/0075 ,  H04L1/0083 ,  H04L1/08 ,  H04L1/1607 ,  H04L5/0055 ,  H04W84/042

Abstract: Techniques are described for wireless communication. One method includes selecting an encoding type for each payload of a plurality of payloads. The selecting includes selecting a low density parity check code (LDPCC) encoding type for at least a first payload and selecting a turbo code (TC) encoding type for at least a second payload. The method also includes segmenting each payload into a plurality of code blocks; generating, for each code block, a cyclic redundancy check (CRC); encoding each code block and associated CRC in one or more codewords of a plurality of codewords, in which the encoding is based at least in part on the selected encoding type for a payload associated with the code block; and transmitting the codewords.

公开(公告)号：US09686063B2

公开(公告)日：2017-06-20

申请号：US14199991

申请日：2014-03-06

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Tao Luo ,  Hao Xu ,  Taesang Yoo ,  Peter Gaal ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04L5/00 ,  H04W52/24 ,  H04W72/04 ,  H04B1/707 ,  H04B7/06 ,  H04J11/00

CPC classification number: H04L5/0048 ,  H04B1/707 ,  H04B7/0617 ,  H04J11/0023 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0053 ,  H04L5/0062 ,  H04L5/0066 ,  H04L5/0073 ,  H04L5/0092 ,  H04W52/244 ,  H04W72/0426

Abstract: For an enhanced physical downlink control channel (EPDCCH), unlimited traffic-to-pilot ratio (TPR) variations across resource elements of a physical resource block (PRB) pair is problematic because of the detrimental affect the variations will have on the ability of a user equipment (UE) to perform inter-cell/intra-cell interference suppression (IS) and/or interference cancellation (IC) on EPDCCH of an interfering cell. A TPR limitation is placed on EPDCCH to facilitate IS/IC without causing practical limitations on EPDCCH management by an eNB. Accordingly, a method, an apparatus, and a computer program product for wireless communication are provided. The apparatus identifies a plurality of resource elements of at least one PRB pair for transmitting one or more control channels, divides the plurality of identified resource elements into one or more groups, and restricts a plurality of resource elements in a respective group to a TPR.

公开(公告)号：US09628228B2

公开(公告)日：2017-04-18

申请号：US13943336

申请日：2013-07-16

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Tao Luo

IPC: H04W72/00 ,  H04L5/00 ,  H04B15/00 ,  H04B1/7097 ,  H04J11/00 ,  H04L27/26 ,  H04W24/02 ,  H04W72/08

CPC classification number: H04L5/0032 ,  H04B1/7097 ,  H04B15/00 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J11/005 ,  H04J11/0069 ,  H04L5/0048 ,  H04L27/2657 ,  H04L27/2662 ,  H04W24/02 ,  H04W72/082

Abstract: Obtaining a timing reference in wireless communication is facilitated when desiring to communicate with a weak serving base station (such as an evolved NodeB) in the presence of a stronger interfering base station. The user equipment (UE) may track a stronger interfering base station's timing, or the UE may track a timing that is derived by a composite power delay profile (PDP) from multiple base stations. The composite PDP may be constructed by adjusting individual base station PDPs according to a weighting scheme. The timing obtained in such a manner may be used for estimation of the channel of the interfering base station and cancelling interfering signals from the base station. It may also be used to estimate the channel of the serving base station after adding a backoff. The UE may track a stronger interfering base station's frequency, or the UE may track a composite frequency.

公开(公告)号：US20170099653A1

公开(公告)日：2017-04-06

申请号：US15258445

申请日：2016-09-07

Applicant: QUALCOMM Incorporated

Inventor： Taesang Yoo ,  Jing Sun ,  Xiaoxia Zhang ,  Juan Montojo

IPC: H04W72/04 ,  H04W48/16 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/0064 ,  H04L5/0094 ,  H04L27/2602 ,  H04W48/16

Abstract: Techniques are described for wireless communication. A method for wireless communication at a base station includes determining a set of physical downlink control channels (PDCCHs) to be transmitted in a control region; transmitting an enhanced physical control format indicator channel (ePCFICH) identifying a quantity of PDCCHs in the set of PDCCHs associated with each aggregation level of at least one aggregation level, and a size of the control region; and transmitting the set of PDCCHs in the control region on a component carrier deployed in a radio frequency spectrum band. A method for wireless communication at a user equipment (UE) device includes receiving the ePCFICH; receiving the control region; and searching for at least one PDCCH within the control region based at least in part on receiving the ePCFICH.