公开(公告)号：US20170359714A1

公开(公告)日：2017-12-14

申请号：US15386114

申请日：2016-12-21

Applicant: QUALCOMM Incorporated

Inventor： Piyush Gupta ,  Tingfang Ji ,  Chong Li ,  Shailesh Patil ,  Joseph Binamira Soriaga ,  Jing Jiang ,  Wei Zeng ,  Alexei Yurievitch Gorokhov ,  Junyi Li

IPC: H04W8/00 ,  H04W74/08 ,  H04W64/00 ,  H04W72/02

CPC classification number: H04W8/005 ,  H04W64/006 ,  H04W72/02 ,  H04W74/08 ,  H04W74/0825 ,  H04W92/18

Abstract: Device detection in networks with mixed mobility devices is discussed. Devices in the network first determine a discovery mode from a plurality of discovery modes, wherein the determining is based on a mobility state of the wireless device. The device identifies a set of resources associated with the determined discovery mode, wherein each of the plurality of discovery modes is provisioned with separate resources. A discovery signal is transmitted using the identified set of resources according to the discovery mode. Thus, devices with higher mobility will generally send discovery signals more often than devices that are static or semi-static.

公开(公告)号：US20170353971A1

公开(公告)日：2017-12-07

申请号：US15368425

申请日：2016-12-02

Applicant: QUALCOMM Incorporated

Inventor： Piyush Gupta ,  Chong Li ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Shailesh Patil ,  Jing Jiang ,  Wei Zeng ,  Alexei Gorokhov ,  Junyi Li

IPC: H04W72/14 ,  H04W72/12 ,  H04W76/02

CPC classification number: H04W72/14 ,  H04W72/12 ,  H04W72/1284 ,  H04W72/1289 ,  H04W74/04 ,  H04W76/14

Abstract: An apparatus may receive, from a scheduling entity, sidelink grant information in a downlink control channel. After receiving the grant information in the downlink control channel, the apparatus may transmit a request-to-send (RTS) signal comprising an indication of a requested duration of time to reserve a sidelink channel for sidelink data. If the sidelink channel is available for the requested duration of time, the apparatus may receive a clear-to-send (CTS) signal configured to indicate an availability of the sidelink channel for the requested duration of time. Subsequently, the apparatus may communicate, with another apparatus different from the scheduling entity, the sidelink data using the sidelink channel during the requested duration of time. Afterwards, the apparatus may communicate acknowledgment information corresponding to the communication of the sidelink signal with the other apparatus. Various additional and alternative aspects are described herein.

公开(公告)号：US20170331658A1

公开(公告)日：2017-11-16

申请号：US15288884

申请日：2016-10-07

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Peter Gaal ,  Tingfang Ji

IPC: H04L27/26 ,  H04L5/22 ,  H04W72/12

CPC classification number: H04L27/2607 ,  H04L5/22 ,  H04W72/1263 ,  H04W72/1278

Abstract: An apparatus may determine a cyclic prefix (CP) length for a signal for a communication link based on a dynamic indication. The CP length may be determined from a plurality of CP lengths. The apparatus may communicate the signal using the determined CP length. Determining the CP length may be further based on at least one of a modulation and coding scheme, a subcarrier spacing, a service type, a communication link direction, a rank number, a type or a capability of the node, or a number of nodes scheduled in the same transmit time interval. Determining the CP length may include determining a first CP length for a first symbol of a plurality of symbols in the TTI, and determining a second CP length, different than the first CP length, for a second symbol of the plurality of symbols in the TTI. Various additional and alternative aspects are described herein.

公开(公告)号：US09814040B2

公开(公告)日：2017-11-07

申请号：US14750719

申请日：2015-06-25

Applicant: QUALCOMM Incorporated

Inventor： Naga Bhushan ,  Jing Jiang ,  Tingfang Ji ,  Krishna Kiran Mukkavilli ,  Joseph Binamira Soriaga ,  John Edward Smee

IPC: H04W72/04 ,  H04L1/18 ,  H04L5/00

CPC classification number: H04W72/0446 ,  H04L1/1812 ,  H04L1/1854 ,  H04L1/1887 ,  H04L5/0055 ,  H04W72/042 ,  H04W72/0493

Abstract: Methods, systems, and devices for wireless communication are described. In some examples, a wireless system may use a staggered uplink/downlink (UL/DL) format in which the symbol periods of the downlink are offset from the symbol periods of the uplink. Thus, if a user equipment (UE) receives a transmission in a first symbol period, it may decode the transmission and transmit a response in a staggered symbol period (e.g., in a UL control channel symbol period beginning one half of a symbol period after the first symbol period). A base station may then receive the response and, if it is a negative acknowledgement (NACK), retransmit during the third symbol period following the first symbol period. In another example, thin control channels may be used to reduce the round trip time between receiving a transmission and a retransmission.

公开(公告)号：US20170311315A1

公开(公告)日：2017-10-26

申请号：US15454535

申请日：2017-03-09

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Tao Luo ,  Sundar Subramanian ,  Navid Abedini ,  Junyi Li ,  Juergen Cezanne ,  Hung Dinh Ly ,  Joseph Binamira Soriaga ,  Tingfang Ji

IPC: H04W72/04 ,  H04W74/08 ,  H04W56/00

CPC classification number: H04W72/0446 ,  H04L5/0007 ,  H04L5/003 ,  H04L5/0091 ,  H04L27/2602 ,  H04L27/2666 ,  H04W56/0015 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communication are described. Methods, systems, and devices provide for different tone spacing schemes for different channels. Methods, systems, and devices also provide for different tone spacing schemes for different stages of communication between a UE and a base station. The base station may indicate, to the UE, the tone spacing scheme in a control channel, a synchronization signal, or a reference signal and the tone spacing scheme may be selected by the base station from available tone spacing schemes for communication. Tone spacing schemes may also be referred to as numerologies.

公开(公告)号：US20170288759A1

公开(公告)日：2017-10-05

申请号：US15469806

申请日：2017-03-27

Applicant: QUALCOMM Incorporated

Inventor： June NAMGOONG ,  Alexandros MANOLAKOS ,  Joseph Binamira SORIAGA ,  Jing JIANG ,  Tingfang Ji

IPC: H04B7/06 ,  H04B7/0456 ,  H04W52/04 ,  H04W52/26 ,  H04W52/02 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04B7/0639 ,  H04B7/0408 ,  H04B7/0456 ,  H04B7/0486 ,  H04B7/0842 ,  H04L1/0015 ,  H04L1/0031 ,  H04L5/0017 ,  H04L5/0023 ,  H04L5/005 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/0224 ,  H04L25/03891 ,  H04W52/0258 ,  H04W52/04 ,  H04W52/262 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/444

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The apparatus may receive a transmission over a precoded channel. The transmission may include a layer having a plurality of symbols, each symbol having a plurality of modulated tones precoded on a per-tone basis. The receive layer may be associated with a power delay profile. The apparatus may estimate the precoded channel based on a time support of the power delay profile.

公开(公告)号：US20170272224A1

公开(公告)日：2017-09-21

申请号：US15070694

申请日：2016-03-15

Applicant: QUALCOMM Incorporated

Inventor： Peter Pui Lok Ang ,  Jing Jiang ,  Krishna Kiran Mukkavilli ,  Tingfang Ji ,  John Edward Smee ,  Jamie Menjay Lin ,  Rotem Cooper ,  Michael Alexander Howard

IPC: H04L5/00

Abstract: Systems and methods are disclosed for minimizing latency between receipt of a NACK at a base station from a user equipment (UE) and retransmission of data to the UE. Time constraints for processing the ACK/NACK are relaxed so the base station can decode the ACK/NACK to determine whether a NACK has been received and then prepare for transmission of the appropriate data to the UE in the immediately following transmission time interval (TTI). These constraints are relaxed by separating download data indicator (DDI) from the PDCCH control data and delaying transmission of the DDI until decoding of the ACK/NACK.

公开(公告)号：US09763189B2

公开(公告)日：2017-09-12

申请号：US14793175

申请日：2015-07-07

Applicant: QUALCOMM Incorporated

Inventor： Peter Pui Lok Ang ,  Joseph Binamira Soriaga ,  Tingfang Ji ,  Joseph Patrick Burke ,  Stephen Jay Shellhammer ,  Krishna Kiran Mukkavilli ,  John Edward Smee

IPC: H04W56/00 ,  H04W52/02

CPC classification number: H04W52/0216 ,  H04W52/0293 ,  H04W56/001 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/22 ,  Y02D70/26

Abstract: Some aspects of the present disclosure provide for methods, apparatus, and computer software for low-power synchronization of wireless communication devices. In one example, an asynchronous code division multiple access (CDMA) channel may be utilized for uplink communication. By utilizing asynchronous CDMA on the uplink, synchronization requirements are relaxed relative to other forms of communication. Accordingly, a synchronization period after coming out of a sleep state can be short, reducing power consumption during re-synchronization. In another example, a low-power companion receiver, rather than the full-power WWAN receiver, may be utilized to acquire a sync signal while the device is in its sleep state. Once synchronism is achieved via the low-power companion receiver, the full-power radio may power up and perform communication with the network. By shifting the synchronization from the full-power radio to the low-power companion radio, power consumption during re-synchronization can be achieved.

公开(公告)号：US09750044B2

公开(公告)日：2017-08-29

申请号：US14262547

申请日：2014-04-25

Applicant: QUALCOMM Incorporated

Inventor： Hao Xu ,  Peter Gaal ,  Wanshi Chen ,  Tao Luo ,  Tingfang Ji ,  Aleksandar Damnjanovic

IPC: H04W72/12 ,  H04W56/00

CPC classification number: H04W72/1273 ,  H04W56/0015 ,  H04W72/1268

Abstract: Certain aspects relate to techniques and apparatus for network synchronization by network listening. Aspects include transmitting a synchronization signal for a base station (BS) to use for acquiring synchronization with the network. Aspects include listening for a synchronization signal from a BS to use for acquiring network synchronization. In aspects, a method for wireless communications by a BS is provided. The method generally includes acquiring synchronization with a network based on a first synchronization signal transmitted from a primary BS or a secondary BS, determining a synchronization stratum for the BS based on whether the BS acquired synchronization with the network from the primary BS or from the secondary BS, and transmitting a second synchronization signal for one or more other BSs to use for acquiring synchronization with the network, wherein the transmitting is based, at least in part on the determined synchronization stratum.

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.