公开(公告)号：US09867187B2

公开(公告)日：2018-01-09

申请号：US14807024

申请日：2015-07-23

Applicant: QUALCOMM Incorporated

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

IPC: H04W72/00 ,  H04W72/04 ,  H04L27/26 ,  H04W74/08 ,  H04W72/12

CPC classification number: H04W72/0453 ,  H04L27/2601 ,  H04W72/0413 ,  H04W72/1268 ,  H04W74/0833

Abstract: Techniques for wireless communications over a shared radio frequency spectrum band, may include techniques for transmitting uplink data transmissions using allocated uplink resources. Allocated uplink resources may include an uplink channel comprising a number of allocated interlaces of resource blocks (RBs) for use by a user equipment (UE). An incoming data stream may be processed and data separated into each of the allocated interlaces of RBs for the UE. Such separation may be through demultiplexing the data stream to obtain data for the allocated interlaces of RBs. The demultiplexed data may be mapped onto associated resource elements associated with the allocated interlaces of RBs, and transmitted. Different types of uplink channels, such as a physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH) and/or a physical random access channel (PRACH) may be allocated to interlaces of RBs in one or more subframes of a transmitted radio frame.

公开(公告)号：US09867163B2

公开(公告)日：2018-01-09

申请号：US13931346

申请日：2013-06-28

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Tao Luo ,  Tingfang Ji ,  Wanshi Chen ,  Peter Gaal ,  Yongbin Wei ,  Gavin B. Horn

IPC: H04W72/00 ,  H04W52/02 ,  H04W48/14 ,  H04W48/12

CPC classification number: H04W72/005 ,  H04W48/12 ,  H04W48/14 ,  H04W52/0206 ,  Y02B70/32 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146

Abstract: The described aspects include methods and apparatus for activating a transmitter to communicate in a wireless network. A small cell can determine to activate the transmitter to serve user equipment (UE) in a wireless network. The small cell can then broadcast a portion of a set of broadcast signals in a radio frame and broadcast a remaining portion of the set of broadcast signals along with the portion of the set of broadcast signals in a subsequent radio frame. By refraining from immediately broadcasting all broadcast signals, the small cell can mitigate interference to other small cells. In addition, a UE can determine whether to generate random access channel (RACH) sequences for proximity determination or uplink timing synchronization based on parameters received in a RACH order. Moreover, a small cell with an active transmitter can decode discovery signals from a device to facilitate handover determination.

公开(公告)号：US09867129B2

公开(公告)日：2018-01-09

申请号：US15335386

申请日：2016-10-26

Applicant: QUALCOMM Incorporated

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

IPC: H04W52/02 ,  H04B7/14 ,  H04W88/04

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 identifies first entity and transmits a very low duty cycle signal (LDCS) configuration of the first entity. The apparatus may comprise, e.g., an LPN that is not in a dormant state or a macrocell. The apparatus may receive LDCS information for the first entity. The apparatus may determine the LDCS configuration and transmit the LDCS configuration to the first entity.

公开(公告)号：US20170359849A1

公开(公告)日：2017-12-14

申请号：US15608091

申请日：2017-05-30

Applicant: QUALCOMM Incorporated

Inventor： Wei Zhang ,  Xiaoxia Zhang ,  Juan Montojo ,  Yongbin Wei ,  Aleksandar Damnjanovic

IPC: H04W76/04 ,  H04W72/12 ,  H04W74/08 ,  H04W72/14

Abstract: Aspects described herein relate to configuring a discontinuous receive (DRX) mode in wireless communications. A transmission burst can be received over a communication frame, wherein the transmission burst includes a scheduling indication. A DRX OFF mode can be entered to suspend communication resources during at least an off period corresponding to a portion of a time period for the transmission burst based at least in part on the scheduling indication. A DRX ON mode can be entered to activate the communication resources during an on period corresponding to another portion of the time period subsequent to the off period defined for the transmission burst or a different time period subsequent to the time period defined for the transmission burst based at least in part on the scheduling indication.

公开(公告)号：US20170347382A1

公开(公告)日：2017-11-30

申请号：US15682219

申请日：2017-08-21

Applicant: QUALCOMM Incorporated

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

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

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：US09825745B2

公开(公告)日：2017-11-21

申请号：US15161113

申请日：2016-05-20

Applicant: QUALCOMM Incorporated

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

IPC: H04L5/00 ,  H04W72/04 ,  H04W56/00

CPC classification number: H04L5/005 ,  H04L5/0053 ,  H04W56/0045 ,  H04W72/0406

Abstract: Methods, systems, and devices are described for supporting common reference signaling in wireless communications systems. Some configurations introduce a phase discontinuity between common reference signal (CRS) transmissions on different subframes. This may address issues that may arise when a reduced CRS periodicity is utilized. Indicators may also be transmitted from base stations to user equipment (UEs) to indicate whether phase continuity may be assumed or not. Some configurations may support CRS sequence initialization. These tools and techniques may utilize an extended CRS sequence periodicity, which may increase the number of CRS sequences transmitted by a cell.

公开(公告)号：US20170332409A1

公开(公告)日：2017-11-16

申请号：US15586840

申请日：2017-05-04

Applicant: QUALCOMM Incorporated

Inventor： Srinivas Yerramalli ,  Peter Gaal ,  Chirag Patel ,  Arumugam Chendamarai Kannan ,  Juan Montojo ,  Yongbin Wei

IPC: H04W74/08 ,  H04L5/00

CPC classification number: H04W74/0833 ,  H04L1/00 ,  H04L1/08 ,  H04L5/00 ,  H04L5/0041 ,  H04W16/14 ,  H04W74/0866

Abstract: Techniques are described for wireless communication. One method includes transmitting a sequence of deterministic variations of random access data on at least one interlace of non-contiguous frequency resources allocated to a physical random access channel (PRACH) in an unlicensed spectrum, beginning at a first time; repeating the transmitting of the sequence of deterministic variations of random access data at least once, beginning at a second time; generating at least one modification of the sequence of deterministic variations of random access data, in which the at least one modification is generated according to a modification sequence; and transmitting on the at least one interlace, beginning at a third time, the at least one modification of the sequence of deterministic variations of random access data.

公开(公告)号：US09794922B2

公开(公告)日：2017-10-17

申请号：US14836183

申请日：2015-08-26

Applicant: QUALCOMM Incorporated

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

IPC: H04J3/00 ,  H04W72/04 ,  H04W72/14 ,  H04L1/00 ,  H04W88/02 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L1/00 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0064 ,  H04W72/0446 ,  H04W72/14 ,  H04W88/02

Abstract: An example data structure for managing user equipment communications in a wireless communications system is presented, as well as methods and apparatuses configured to implement the data structure. For instance, the data structure may include a downlink subframe comprising two slots and including one or more quick downlink channels having a single-slot transmission time interval. In addition, the example data structure may include one or more resource element blocks each comprising one or more resource elements into which a frequency bandwidth is divided within one or both of the two slots, wherein each of the one or more resource element blocks comprises a control channel region or a data channel region. Furthermore, the example data structure may include one or more resource grants, located within one or more control channel regions, for one or more user equipment served by the one or more quick downlink channels.

公开(公告)号：US09780847B2

公开(公告)日：2017-10-03

申请号：US15067932

申请日：2016-03-11

Applicant: QUALCOMM Incorporated

Inventor： Petru Cristian Budianu ,  Jing Sun ,  Siddhartha Mallik ,  Yongbin Wei ,  Durga Prasad Malladi

IPC: H04B1/38 ,  H04L7/00 ,  H04B7/0417 ,  H04L5/00 ,  H04B7/0452 ,  H04L1/00 ,  H04B7/0456 ,  H04B7/06

CPC classification number: H04B7/0417 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0626 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0028 ,  H04L1/0029 ,  H04L5/0057

Abstract: Channel feedback reporting for non-orthogonal wireless communication systems employing frequency selective channels. A plurality of channel feedback matrices corresponding to a plurality of sub-carriers of a sub-band for a non-orthogonal channel may be determined by a UE, and one or more effective channel feedback matrices for the sub-band may be determined based on the plurality of channel feedback matrices. Each of the one or more effective channel feedback matrices may be associated with corresponding sets of transmission strategies, where each of the corresponding sets of transmission strategies include one or more transmission strategies of a plurality of transmission strategies for the non-orthogonal channel. Channel feedback information representing the one or more effective channel feedback matrices may be reported to a base station, which may estimate channel quality for the plurality of transmission strategies based at least in part on the channel feedback information, for downlink transmissions to UEs over the non-orthogonal channel.

公开(公告)号：US20170264406A1

公开(公告)日：2017-09-14

申请号：US15376025

申请日：2016-12-12

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Hao Xu ,  Wanshi Chen ,  Xiao Feng Wang ,  Renqiu Wang ,  Yongbin Wei ,  Juan Montojo ,  Alberto Rico Alvarino ,  Peter Gaal

IPC: H04L5/00 ,  H04W72/04 ,  H04W48/16 ,  H04W4/00

CPC classification number: H04L5/0048 ,  H04J11/0069 ,  H04L5/001 ,  H04L5/0053 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2663 ,  H04L27/2671 ,  H04L27/2675 ,  H04L2027/0026 ,  H04W4/70 ,  H04W48/16 ,  H04W56/0015 ,  H04W72/0406 ,  H04W88/02 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/21

Abstract: Methods, systems, and devices for wireless communication are described. A base station may broadcast a synchronization signal using a narrowband portion of a bandwidth of a cell. The synchronization signal may include a sequence repeated over several symbol periods using a cover code to support power-efficient cell acquisition. A user equipment (UE) receiving the synchronization signal may determine frequency and timing information for a cell by performing a weighted combination and accumulation of low complexity autocorrelation and cross-correlation procedures on the synchronization signal. The reduced complexity correlation procedures may be enabled based on the use of the cover code and a base sequence. In some cases, the cross-correlation may be performed at multiple sampling rates. The use of the cover code within the synchronization signal may also support correlation procedures that use recursive or repeated updates, which may allow for further reduced computational complexity relative to other cell search procedures.