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：US09787443B2

公开(公告)日：2017-10-10

申请号：US14723765

申请日：2015-05-28

Applicant: QUALCOMM Incorporated

Inventor： Aleksandar Damnjanovic ,  Durga Prasad Malladi ,  Wanshi Chen ,  Yongbin Wei ,  Madhavan Srinivasan Vajapeyam ,  Tao Luo ,  Peter Gaal ,  Hao Xu

IPC: H04L5/00 ,  H04L5/14 ,  H04W72/04 ,  H04J11/00 ,  H04W56/00 ,  H04W74/08

CPC classification number: H04L5/0007 ,  H04J11/00 ,  H04J2011/0096 ,  H04L5/14 ,  H04W56/001 ,  H04W72/042 ,  H04W72/0446 ,  H04W74/08

Abstract: Techniques are described for wireless communication. A first method may include performing a clear channel assessment (CCA) on an unlicensed radio frequency spectrum band; transmitting an indication of a time division duplexing (TDD) configuration over the unlicensed radio frequency spectrum band when the CCA is successful; and transmitting downlink data over the unlicensed radio frequency spectrum band in accordance with the TDD configuration when the CCA is successful. A second method may include performing a CCA on an unlicensed radio frequency spectrum band; dynamically determining, based at least in part on at least one grant to a user equipment (UE), and for a period following the CCA, a number of uplink subframes for communication over the unlicensed radio frequency spectrum band; and transmitting downlink data over the unlicensed radio frequency spectrum band in accordance with the timing of the number of uplink subframes when the CCA is successful.

公开(公告)号：US20170288823A1

公开(公告)日：2017-10-05

申请号：US15628401

申请日：2017-06-20

Applicant: QUALCOMM Incorporated

Inventor： Naga Bhushan ,  Durga Prasad Malladi ,  Yongbin Wei ,  Peter Gaal ,  Tao Luo ,  Tingfang Ji ,  Gavin Bernard Horn ,  Wanshi Chen ,  Aleksander Damnjanovic

IPC: H04W28/08 ,  H04L1/00 ,  H04L27/00 ,  H04L27/26 ,  H04L5/00 ,  H04L5/14 ,  H04W16/14 ,  H04W24/02 ,  H04W28/02 ,  H04W28/16 ,  H04W48/10 ,  H04W56/00 ,  H04W72/04 ,  H04W72/08 ,  H04W74/00 ,  H04W74/04 ,  H04W74/08 ,  H04W76/02 ,  H04J11/00 ,  H04W84/12 ,  H04W88/02 ,  H04W88/06 ,  H04W88/08

Abstract: Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum, transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available, and receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. A second method includes transmitting an RTS signal in an unlicensed spectrum or a V-RTS signal in a licensed spectrum, addressed to a set of UEs, and transmitting a CTS-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal.

公开(公告)号：US20170288819A1

公开(公告)日：2017-10-05

申请号：US15444875

申请日：2017-02-28

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Shimman Arvind Patel ,  Yongbin Wei ,  Aleksandar Damnjanovic

IPC: H04L1/18 ,  H04W72/12 ,  H04W74/02 ,  H04W72/04

CPC classification number: H04L1/1812 ,  H04L1/1854 ,  H04L1/1887 ,  H04L5/0044 ,  H04L5/0055 ,  H04W72/0413 ,  H04W72/0446 ,  H04W72/0466 ,  H04W72/1273 ,  H04W72/1284 ,  H04W74/02

Abstract: Systems, methods, and apparatuses are described for wireless communication, including for hybrid automatic repeat request (HARQ) feedback in a system that supports communications using transmission time intervals (TTIs) of different durations. A base station may identify a user equipment's (UE) capability to provide HARQ feedback for transmissions that use TTIs of a shorter duration relative to other TTIs supported in the system. The base station may select a HARQ timing mode based on the capability of the UE and may indicate the selected HARQ timing mode to the UE. The base station may then transmit one or more data transmissions to the UE using the reduced TTIs. The UE may respond with HARQ feedback based on the HARQ timing mode. The HARQ timing mode may be based on different response times based on the location of the data transmission within a TTI or relative to data transmission in other TTIs.

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：US20170223670A1

公开(公告)日：2017-08-03

申请号：US15356966

申请日：2016-11-21

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Shimman Arvind Patel ,  Yongbin Wei ,  Aleksandar Damnjanovic ,  Hao Xu

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04L5/0048 ,  H04L5/0053 ,  H04W24/08 ,  H04W72/00 ,  H04W88/02

Abstract: Control information may be transmitted for different TTI lengths. Different control information for the different TTIs may be transmitted using control channel resources that are established for communication of control information, such as a physical downlink control channel (PDCCH), for example. Control information for a first TTI may be located in a first set of resources, and control information for a second TTI may be located in a second set of resources. The first set of resources may be located within a first search space that may be searched by a user equipment (UE) to identify the first control information. The second set of resources may be located within a second search space that may be searched by the UE to identify the second control information.

公开(公告)号：US09723558B2

公开(公告)日：2017-08-01

申请号：US13802637

申请日：2013-03-13

Applicant: QUALCOMM Incorporated

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

IPC: H04L12/16 ,  H04W52/02

CPC classification number: H04W52/0225 ,  H04B7/14 ,  H04L5/0007 ,  H04W52/0206 ,  H04W52/0209 ,  H04W52/0216 ,  H04W52/0229 ,  H04W74/0833 ,  H04W88/04 ,  H04W88/08 ,  Y02B70/30 ,  Y02D70/00 ,  Y02D70/122 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/24 ,  Y02D70/25

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus transitions to a dormant state and transmits a very low duty cycle signal (LDCS) while in the dormant state. The apparatus may transmit an LDCS configuration to a second entity, the second entity being one of an LPN that is not in a dormant state and a macro cell. The apparatus may further monitor for a RACH messages at a predetermined RACH delay after transmitting the LDCS. The apparatus may transition to a DRX/DTX mode. The DRX/DTX mode may be matched to at least one connected UE.

公开(公告)号：US09705647B2

公开(公告)日：2017-07-11

申请号：US15362468

申请日：2016-11-28

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad Malladi ,  Yongbin Wei

IPC: H04L5/00 ,  H04J11/00 ,  H04B1/7097 ,  H04W72/08 ,  H04L5/14 ,  H04W72/04

CPC classification number: H04L5/0032 ,  H04B1/7097 ,  H04J11/0023 ,  H04J11/005 ,  H04J11/0059 ,  H04L5/14 ,  H04W72/0446 ,  H04W72/048 ,  H04W72/082

Abstract: Interference cancellation occurs for devices, where the source of the interference is another UE. The victim UE receiver identifies subframes vulnerable to potential interference from other UEs. Candidate resource blocks in the identified vulnerable subframes are listed. Interference is cancelled for edge resource blocks and valid contiguous resource blocks.

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：US20170150482A1

公开(公告)日：2017-05-25

申请号：US15422185

申请日：2017-02-01

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei ,  Stefan Geirhofer

IPC: H04W72/04 ,  H04B7/0413 ,  H04L5/14 ,  H04L5/00

Abstract: Enhanced sounding reference signal (SRS) transmissions for multiple input, multiple output (MIMO) operation are disclosed in which a user equipment (UE) detects an observed interference level for each receiver chain of the UE. In response to an imbalance, the UE precodes a SRS targeting downlink operation to indicate the imbalance. The UE then transmits the precoded SRS. In alternative aspects, the precoded SRS vector may be determined by an evolved nodeB (eNB). In such aspects, the eNB determines the precoded SRS vector targeting downlink operations for the served UEs, wherein the determined precoded SRS vector includes determining the precoded SRS vector on a per UE basis, enabling the precoded SRS vector for either one or both of frequency division duplex (FDD) systems and time division duplex (TDD) systems, or enabling the precoded SRS vector for aperiodic SRS only. The eNB then transmits the determined precoded SRS vector to the UE.