公开(公告)号：US09743432B2

公开(公告)日：2017-08-22

申请号：US14493067

申请日：2014-09-22

Applicant: QUALCOMM Incorporated

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

IPC: H04W4/00 ,  H04W74/08 ,  H04J3/16 ,  H04J13/10 ,  H04L5/00 ,  H04W16/14 ,  H04W72/04 ,  H04W74/00

CPC classification number: H04W74/0866 ,  H04J3/16 ,  H04J13/10 ,  H04L5/0041 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04W16/14 ,  H04W72/0453 ,  H04W74/002

Abstract: Uplink waveforms for operating long term evolution (LTE) in an unlicensed band (i.e., long term evolution-unlicensed (LTE-U) communication) are disclosed. Carrier aggregation (CA) and standalone (SA) are disclosed. LTE on the licensed channel may provide both control and data, LTE on the unlicensed channel may provide data. Managing variable transmission time interval (TTI) continuous transmission is disclosed for transmission over multiple subframes of an unlicensed carrier in LTE-U. Listen-before-talk (LBT) requirements of unlicensed carriers provide for additional channel occupancy constraints when scheduling resources for multiple UEs for variable TTI continuous uplink transmissions over multiple subframes. A joint control channel is disclosed that provides control information for all of the potentially available subframes to be scheduled for the uplink transmissions. In addition to management of the variable TTI continuous transmissions, adjustments to uplink signal parameters are also disclosed that address the constraints due to the LBT requirements of unlicensed carriers.

公开(公告)号：US09717071B2

公开(公告)日：2017-07-25

申请号：US14459676

申请日：2014-08-14

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04L27/00 ,  H04W74/08 ,  H04W72/12 ,  H04L5/00 ,  H04W16/14

CPC classification number: H04W72/04 ,  H04L5/001 ,  H04L5/003 ,  H04L27/0006 ,  H04W16/14 ,  H04W72/1215 ,  H04W74/0833

Abstract: Long term evolution (LTE)/LTE-Advanced (LTE-A) deployments with unlicensed spectrum leverage more efficient LTE communication aspects over unlicensed spectrum, such as over WIFI radio access technology. In order to accommodate such communications, various uplink procedures may be modified in order to handle communications between licensed and unlicensed spectrum with LTE/LTE-A deployments with unlicensed spectrum.

公开(公告)号：US09681425B2

公开(公告)日：2017-06-13

申请号：US13887168

申请日：2013-05-03

Applicant: QUALCOMM Incorporated

Inventor： Stefan Geirhofer ,  Wanshi Chen ,  Peter Gaal ,  Yongbin Wei ,  Naga Bhushan

IPC: H04W4/00 ,  H04W72/04 ,  H04B7/0417 ,  H04B7/06

CPC classification number: H04W72/0413 ,  H04B7/0417 ,  H04B7/0621 ,  H04B7/0632 ,  H04B7/0639

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which downlink transmission modes in a wireless network are semi-statically configured for a mobile terminal in multiple-input multiple-output (MIMO) operation. The apparatus provides multiple precoding matrix indicators (PMIs) for a plurality of ranks. The provision of multiple PMIs by the apparatus enables balanced performance among different ranks and avoids less than optimal performance observed when the apparatus provides only a single rank and PMI that are generally not optimal for all transmissions. Feedback configuration information received by an apparatus defines a plurality of channel state information feedback instances conditioned on an admissible rank value. Rank indicators (RIs) and PMIs corresponding to the feedback instances are determined and feedback is provided for the channel state information feedback instances.

公开(公告)号：US20170150430A1

公开(公告)日：2017-05-25

申请号：US15426160

申请日：2017-02-07

Applicant: QUALCOMM Incorporated

Inventor： Tao Luo ,  Yongbin Wei ,  Peter Gaal ,  Durga Prasad Malladi

IPC: H04W48/16 ,  H04W16/14 ,  H04L25/02 ,  H04W72/04 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04W48/16 ,  H04L5/0048 ,  H04L25/0238 ,  H04L27/2601 ,  H04L27/2662 ,  H04W16/14 ,  H04W24/10 ,  H04W52/0274 ,  H04W56/0015 ,  H04W72/042 ,  H04W72/0453 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

Abstract: Techniques are described for wireless communication. A first method includes receiving a first orthogonal frequency division multiplexing (OFDM) symbol including a plurality of reference signals (RSs) over a radio frequency spectrum band. The first method may also include receiving a second OFDM symbol including a first synchronization signal over the radio frequency spectrum band. A second method includes transmitting a first OFDM symbol including a plurality of RSs over an radio frequency spectrum band. The second method may also include transmitting a second OFDM symbol including a first synchronization signal over the radio frequency spectrum band. In each method, a first portion of the first OFDM symbol includes a higher density of the RSs than a remaining portion of the first OFDM symbol, and when included, the second OFDM symbol may be adjacent in time to the first OFDM symbol.

公开(公告)号：US09629166B2

公开(公告)日：2017-04-18

申请号：US13890129

申请日：2013-05-08

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/04 ,  H04W76/02 ,  H04L5/00 ,  H04W48/16

CPC classification number: H04W72/048 ,  H04L5/00 ,  H04L5/001 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0091 ,  H04W48/16 ,  H04W72/0453 ,  H04W76/16

Abstract: A method of wireless communication occurs in a frequency band having a first set of resources associated with a first carrier type and a second set of resources associated with a second carrier type. In one configuration, the first carrier type is a new carrier type and the second carrier type is a legacy carrier type. Legacy UEs may only receive signals from the second carrier type. However, new UEs may receive signals from both the first carrier type and the second carrier type. Therefore, to provide backward compatibility while supporting new UEs, an eNodeB may signal support of the first carrier type to a new UE while maintaining signaling with legacy UEs. Additionally, the eNodeB may restrict operations of a UE to the first set of resources or second set of resources.

公开(公告)号：US09615348B2

公开(公告)日：2017-04-04

申请号：US14983152

申请日：2015-12-29

Applicant: QUALCOMM INCORPORATED

Inventor： Tingfang Ji ,  Ravi Palanki ,  Peter Gaal ,  Hao Xu ,  Yongbin Wei

IPC: H04L12/66 ,  H04L12/56 ,  H04W64/00 ,  H04W24/02 ,  H04L5/00 ,  G01S5/02 ,  H04W72/04 ,  H04W88/08 ,  G01S1/20

CPC classification number: H04W64/00 ,  G01S1/20 ,  G01S5/02 ,  H04L5/0048 ,  H04W24/02 ,  H04W72/0406 ,  H04W72/042 ,  H04W72/0446 ,  H04W88/085

Abstract: A method of wireless communication includes receiving position location reference signals (PRSs) from multiple remote radio heads (RRHs) and a macro eNodeB having a same physical cell identity (PCI). Each PRS is a same PRS. Additionally, the PRSs from the multiple RRHs are received on subframes that are different from subframes used by the macro eNodeB. Furthermore, each PRS does not indicate a source of transmission. The method also includes determining a time difference between the received PRSs.

公开(公告)号：US09608778B2

公开(公告)日：2017-03-28

申请号：US14573577

申请日：2014-12-17

Applicant: QUALCOMM Incorporated

Inventor： Durga Prasad Malladi ,  Yongbin Wei

IPC: H04L5/00 ,  H04J11/00 ,  H04W72/04 ,  H04L5/14 ,  H04W74/08 ,  H04L1/18 ,  H04L27/26

CPC classification number: H04W72/0446 ,  H04J11/00 ,  H04J2011/0009 ,  H04J2011/0013 ,  H04L1/18 ,  H04L5/0007 ,  H04L5/001 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0055 ,  H04L5/0076 ,  H04L5/14 ,  H04L27/2602 ,  H04L27/2605 ,  H04L43/0864 ,  H04W16/32 ,  H04W72/0453 ,  H04W74/08

Abstract: Methods, systems, and devices are described for hierarchical communications within a wireless communications system. An eNB and/or a UE may be configured to operate within the wireless communications system which is at least partially defined through a first layer with first layer transmissions having a first subframe type and a second layer with second layer transmissions having a second subframe type. The first subframe type may have a first round trip time (RTT) between transmission and acknowledgment of receipt of the transmission, and the second layer may have a second RTT that is less than the first RTT. Subframes of the first subframe type may be multiplexed with subframes of the second subframe type, such as through time division multiplexing.

公开(公告)号：US20160381567A1

公开(公告)日：2016-12-29

申请号：US15257457

申请日：2016-09-06

Applicant: QUALCOMM Incorporated

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

IPC: H04W16/14 ,  H04W72/04 ,  H04L5/14 ,  H04W28/08 ,  H04L5/00

Abstract: Methods and apparatuses are described for wireless communications. A first method includes transmitting a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal to a wireless node in a licensed spectrum, and transmitting, concurrently with the transmission of the first OFDMA communications signal, a second OFDMA communications signal to the wireless node in an unlicensed spectrum. A second method includes receiving a first Orthogonal Frequency-Division Multiple Access (OFDMA) communications signal from a wireless node in a licensed spectrum, and receiving, concurrently with the reception of the first OFDMA communications signal, a second OFDMA communication signal from the wireless node in an unlicensed spectrum. A third method includes generating a periodic gating interval for a cellular downlink in an unlicensed spectrum, and synchronizing at least one boundary of the periodic gating interval with at least one boundary of a periodic frame structure associated with a primary component carrier of the cellular downlink.

Abstract translation: 描述了用于无线通信的方法和装置。 第一种方法包括向许可频谱中的无线节点发送第一正交频分多址（OFDMA）通信信号，以及与第一OFDMA通信信号的传输同时向无线节点发送第二OFDMA通信信号 在无牌频谱中。 第二种方法包括从许可频谱中的无线节点接收第一正交频分多址（OFDMA）通信信号，并且与第一OFDMA通信信号的接收同时接收来自无线节点的第二OFDMA通信信号 在无牌频谱中。 第三种方法包括为非许可频谱中的蜂窝下行链路产生周期性门控间隔，并且将周期性选通间隔的至少一个边界与与蜂窝下行链路的主要分量载波相关联的周期性帧结构的至少一个边界同步。

公开(公告)号：US20160242231A1

公开(公告)日：2016-08-18

申请号：US15040702

申请日：2016-02-10

Applicant: QUALCOMM Incorporated

Inventor： Madhavan Srinivasan Vajapeyam ,  Hao Xu ,  Miguel Griot ,  Peter Gaal ,  Masato Kitazoe ,  Yongbin Wei ,  Wanshi Chen

IPC: H04W76/04 ,  H04W24/08 ,  H04W4/00

CPC classification number: H04W76/28 ,  H04W4/70 ,  H04W24/08 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/24

Abstract: Methods, systems, and devices for wireless communication are described. Wireless devices may operate in an extended connected discontinuous reception (eDRX) mode to increase energy efficiency and extend battery life. Control signaling may be used to initiate or support the extended sleep cycles associated with eDRX operation. In some cases, a system frame number (SFN) extension may be implemented to record frame cycles and differentiate SFNs that occur in a first frame cycle from SFNs that occur in a second frame cycle. Control techniques to support eDRX operation and maintain network synchronicity and compatibility may also be employed. In some examples, a wireless system may broadcast extended or dedicated system information updates to an eDRX capable device or devices. In some cases, devices may adjust the rate at which radio link monitoring (RLM) measurements are taken to timely determine radio link failures (RLFs) in conjunction with eDRX operation.

Abstract translation: 描述了用于无线通信的方法，系统和设备。 无线设备可以在扩展连接的不连续接收（eDRX）模式下工作，以提高能量效率并延长电池寿命。 控制信令可用于启动或支持与eDRX操作相关联的扩展睡眠周期。 在一些情况下，可以实现系统帧号（SFN）扩展以记录帧周期并区分在第一帧周期中发生的SFN与在第二帧周期中发生的SFN。 也可以采用支持eDRX操作和维护网络同步性和兼容性的控制技术。 在一些示例中，无线系统可以向具有eDRX能力的设备或设备广播扩展或专用系统信息更新。 在某些情况下，设备可以调整采用无线电链路监控（RLM）测量的速率，以及时确定与eDRX操作相结合的无线电链路故障（RLF）。

公开(公告)号：US20160242213A1

公开(公告)日：2016-08-18

申请号：US15044717

申请日：2016-02-16

Applicant: QUALCOMM Incorporated

Inventor： Onkar Jayant Dabeer ,  Aleksandar Damnjanovic ,  Madhavan Srinivasan Vajapeyam ,  Xiaoxia Zhang ,  Shimman Arvind Patel ,  Wanshi Chen ,  Yongbin Wei

IPC: H04W74/08

CPC classification number: H04W74/0833 ,  H04W16/14 ,  H04W74/0808

Abstract: Techniques are described for wireless communication. One method includes winning a contention for access to an unlicensed radio frequency spectrum band, transmitting a request message upon winning the contention for access to the unlicensed radio frequency spectrum band, and receiving a response message over the unlicensed radio frequency spectrum band. The request message is transmitted by a user equipment (UE) on an enhanced physical random access channel (ePRACH) or shortened ePRACH (SePRACH), to access a cell that operates in the unlicensed radio frequency spectrum band. The response message is received in response to transmitting the request message, and the request message may be transmitted irrespective of whether a base station has gained access to the unlicensed radio frequency spectrum band.

Abstract translation: 技术描述为无线通信。 一种方法包括：获得访问未经许可的射频频带的竞争，在赢得对未经许可的射频频带的访问的争用时发送请求消息，以及通过未许可的射频频带接收响应消息。 请求消息由用户设备（UE）在增强型物理随机接入信道（ePRACH）或缩短的ePRACH（SePRACH）上传输，以访问在非许可射频频带中操作的小区。 响应于发送请求消息而接收到响应消息，并且可以发送请求消息，而不管基站是否已经获得对未许可的射频频带的访问。