公开(公告)号：US10084582B2

公开(公告)日：2018-09-25

申请号：US15850428

申请日：2017-12-21

Applicant: QUALCOMM Incorporated

Inventor： Hung Ly ,  Tao Luo ,  Hao Xu

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

CPC classification number: H04L5/0051 ,  H04L5/0053 ,  H04L5/14 ,  H04L5/1469 ,  H04W72/042

Abstract: Techniques for signaling dynamic control region for PRACH transmission are described. In an aspect, the disclosure describes a method for receiving, at a user equipment (UE), an indication of a number of control symbols that the UE is to assume when transmitting physical random access channel (PRACH), and transmitting, by the UE, the PRACH over one or more slots based on the number of control symbols. In another aspect, the disclosure describes a method for generating, at a network device, an indication of a number of control symbols that a UE is to assume when transmitting PRACH, transmitting, by the network device, the indication to the UE. A UE and network device configuration as well as apparatuses and computer-readable medium related to these methods are also described.

公开(公告)号：US20180263064A1

公开(公告)日：2018-09-13

申请号：US15914787

申请日：2018-03-07

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Tao Luo ,  Sony Akkarakaran ,  Hung Ly ,  Bilal Sadiq

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

CPC classification number: H04W74/0891 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2602 ,  H04W56/0015 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/1205 ,  H04W72/1289 ,  H04W74/0833

Abstract: Methods, systems, and devices for communication timing (e.g., random access channel (RACH) timing) in a wireless communication are described. A base station and a user equipment (UE) may perform a communication procedure (e.g., to establish a communication link between the base station the UE). The communication timing associated with the communication procedure may depend on the numerology used for the communication procedure and may be conveyed by the base station to the UE in a control message or via system information. In some cases, the numerology may indicate the communication timing.

公开(公告)号：US20180263063A1

公开(公告)日：2018-09-13

申请号：US15914759

申请日：2018-03-07

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Tao Luo ,  Sony Akkarakaran ,  Hung Ly ,  Bilal Sadiq

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

CPC classification number: H04W74/0891 ,  H04L5/0007 ,  H04L5/0053 ,  H04L27/2602 ,  H04W56/0015 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/1205 ,  H04W72/1289 ,  H04W74/0833

Abstract: Methods, systems, and devices for random access channel (RACH) timing in a wireless communication are described. A base station and a user equipment (UE) may perform a RACH procedure to establish a communication link between the base station the UE. The RACH timing associated with the RACH procedure may depend on the numerology used for the RACH procedure and may be conveyed by the base station to the UE in a control message or via system information. In some cases, the numerology may indicate the RACH timing, which may be used to determine a number of symbols or absolute time to be used for portions of the RACH procedure.

公开(公告)号：US20180124822A1

公开(公告)日：2018-05-03

申请号：US15799357

申请日：2017-10-31

Applicant: QUALCOMM Incorporated

Inventor： Renqiu Wang ,  Wanshi Chen ,  Hao Xu ,  Hung Ly ,  Heechoon Lee

IPC: H04W74/00

CPC classification number: H04W74/006 ,  H04W74/0833 ,  H04W84/042

Abstract: Wireless communication devices are adapted to facilitate a random access procedure. According to one example, scheduled entity can transmit a first transmission that is received by a scheduling entity. The first transmission may include a physical random access channel (PRACH) preamble sequence and a first message including information for determining a device-specific network identifier for the scheduled entity. The scheduling entity may transmit a second transmission that is received by the scheduled entity. The second transmission may include information on a physical downlink control channel (PDCCH) addressed to the device-specific network identifier for the scheduled entity, and a second message on a physical downlink shared channel (PDSCH). Other aspects, embodiments, and features are also included.

公开(公告)号：US20180110019A1

公开(公告)日：2018-04-19

申请号：US15729153

申请日：2017-10-10

Applicant: QUALCOMM Incorporated

Inventor： Hung Ly ,  Wanshi Chen ,  Jing Sun ,  Hao Xu

IPC: H04W56/00

CPC classification number: H04W56/001 ,  H04L27/2613 ,  H04L27/2692

Abstract: A base station may configure at least a first downlink transmission in a regular downlink burst with the first numerology for transmitting at least a portion of a data channel to a UE according to a numerology of a service used for data channel transmission. The base station also may configure at least a portion of a second downlink transmission in a regular downlink burst with a second numerology for transmitting a synchronization signal to the UE. A UE that receives the downlink regular burst may demodulate and decode the symbols in the received transmissions according to the numerology associated with each symbol.

公开(公告)号：US20180109976A1

公开(公告)日：2018-04-19

申请号：US15614320

申请日：2017-06-05

Applicant: QUALCOMM Incorporated

Inventor： Hung Ly ,  Wanshi Chen ,  Hao Xu ,  Peter Gaal

IPC: H04W28/04 ,  H04L5/00 ,  H04W72/12 ,  H04W72/04 ,  H04W74/08 ,  H04L1/00

CPC classification number: H04W28/04 ,  H04L1/00 ,  H04L1/005 ,  H04L1/08 ,  H04L1/1893 ,  H04L5/0007 ,  H04L5/0053 ,  H04W72/0413 ,  H04W72/1205 ,  H04W74/0808 ,  H04W74/0833

Abstract: Techniques are described herein to improve a link budget of physical random access channel (PRACH) transmissions used during a random access (RACH) procedure. The link budget of a PRACH transmission associated with the RACH procedure may be improved by transmitting multiple PRACH transmissions. The multiple PRACH transmissions may be combined to achieve some combining gain. Each retransmission of a PRACH transmission may be done at a higher power level than the previous PRACH transmission. If UE receives an indication that a target base station failed to successfully decode the PRACH transmission, the UE may retransmit the PRACH transmission but at a higher power level than the initial PRACH transmission. PRACH transmissions may be distributed across multiple slots. PRACH transmissions may be distributed across multiple frequency sub-bands in the same slot or across frequency sub-bands in the different slots.

公开(公告)号：US20180092094A1

公开(公告)日：2018-03-29

申请号：US15462510

申请日：2017-03-17

Applicant: QUALCOMM Incorporated

Inventor： Hung Ly ,  Heechoon Lee ,  Keiichi Kubota ,  Tingfang Ji

IPC: H04W72/04 ,  H04L5/00 ,  H04W68/02 ,  H04W16/32

CPC classification number: H04W72/0453 ,  H04L5/0055 ,  H04W8/26 ,  H04W16/32 ,  H04W48/16 ,  H04W68/02 ,  H04W72/0413 ,  H04W72/0446 ,  H04W74/0833

Abstract: Systems and methods for enabling and providing uplink based mobility procedures are disclosed. Embodiments provide uplink based mobility procedures in which one or more physical channel typically used to facilitate uplink based mobility is not utilized. For example, an uplink based mobility process of embodiments utilizes a UL-based mobility specific ID and/or synchronization signals to provide information for decoding signals avoiding the use of physical cell identifier channel (PCICH). Embodiments of an uplink based mobility process utilize a physical channel, such as a physical slot format indication channel (PSFICH) or a physical downlink control channel (PDCCH), to provide uplink mobility signal acknowledgements and paging indications avoiding the use of a physical keep alive channel (PKACH).

公开(公告)号：US20180063818A1

公开(公告)日：2018-03-01

申请号：US15490851

申请日：2017-04-18

Applicant: QUALCOMM Incorporated

Inventor： Wanshi Chen ,  Yang Yang ,  Peter Ang ,  Chong Li ,  Hung Ly

IPC: H04W72/04 ,  H04W28/20 ,  H04W74/08 ,  H04W24/02

CPC classification number: H04W72/042 ,  H04L5/001 ,  H04L5/0053 ,  H04L5/0094 ,  H04W24/02 ,  H04W28/20 ,  H04W74/0833

Abstract: Aspects of the disclosure relate to determination of bandwidth, frequencies, or a set one or more of subbands that carries a downlink control channel. In some examples, a set of one or more subbands that carries a downlink control channel may be determined based on a function of a predetermined reference resource location. The predetermined reference resource location may be a set of one or more subbands that carries one or more synchronization signals and a broadcast channel. Other aspects, embodiments, and features are also claimed and described.

公开(公告)号：US20170279647A1

公开(公告)日：2017-09-28

申请号：US15251946

申请日：2016-08-30

Applicant: QUALCOMM Incorporated

Inventor： Yang Yang ,  Jing Jiang ,  Tao Luo ,  Hung Ly

IPC: H04L27/26 ,  H04W56/00

CPC classification number: H04L27/2613 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0094 ,  H04L27/2692 ,  H04W56/0035

Abstract: Various aspects provide for communicating a first set of broadcast reference signals (RSs) in a first subframe that includes a synchronization (SYNC) channel and communicating a second set of broadcast RSs in a second subframe that follows the first subframe. The second subframe may immediately follow the first subframe. A portion of the SYNC channel may include information indicating a configuration of broadcast RSs in one or more other subframes. The broadcast RSs may be configured for timing-error estimation, frequency-error estimation, and/or channel estimation. Additional and alternative aspects, embodiments, and features are also provided herein.