公开(公告)号：US20180176949A1

公开(公告)日：2018-06-21

申请号：US15838145

申请日：2017-12-11

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Tao Luo ,  Sumeeth Nagaraja

IPC: H04W74/00 ,  H04W74/08 ,  H04B7/08 ,  H04W72/12

Abstract: Methods, systems, and devices for wireless communication are described for selecting different uplink transmission parameters for transmission or retransmission of a random access message. A user equipment (UE) may transmit or retransmit a random access message such as a layer 2 or layer 3 (L2/L3) message to a base station during a random access procedure. The UE may select a transmission beam, uplink resource or transmission power for the transmission of the L2/L3 message that differ from those used for transmission of a previous random access message. The selection may be based on path loss associated with synchronization signals or previous transmissions. The selection may also be based on a maximum number of retransmissions.

公开(公告)号：US20180132252A1

公开(公告)日：2018-05-10

申请号：US15664499

申请日：2017-07-31

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sundar Subramanian ,  Junyi Li ,  Juergen Cezanne ,  Navid Abedini ,  Bilal Sadiq ,  Tao Luo ,  Ashwin Sampath

IPC: H04W72/08 ,  H04W72/04

CPC classification number: H04W72/085 ,  H04B7/0617 ,  H04W16/28 ,  H04W36/06 ,  H04W36/32 ,  H04W52/0216 ,  H04W72/046 ,  H04W72/048 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/20 ,  Y02D70/24 ,  Y02D70/444

Abstract: Techniques are described for wireless communication. One method includes exchanging one or more signals between a first wireless node and a second wireless node and determining, at the first wireless node and based at least in part on the one or more signals, a range of correspondence between at least one of a transmit beam of the first wireless node and a receive beam of the first wireless node.

公开(公告)号：US20180098355A1

公开(公告)日：2018-04-05

申请号：US15427839

申请日：2017-02-08

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Sundar Subramanian ,  Jung Ryu

IPC: H04W74/08 ,  H04W76/02 ,  H04W24/08

CPC classification number: H04W74/0808 ,  H04W24/08 ,  H04W74/0816 ,  H04W76/10

Abstract: Techniques for procedures using request to send/clear to send (RTS/CTS) procedures and multiple timers are described. A RTS/CTS procedure using multiple timers may use a first timer and a second timer. The first timer may be associated with a duration to transmit and receive a request to send (RTS) message and a clear to send (CTS) message. The second timer may be associated with a duration to transmit a data message. A network device may transmit a RTS message to request communication resources to transmit data. If the CTS message is not received prior to the expiration of the first timer, neighboring network devices may determine that the communication resources were not allocated and may attempt to request the newly available resources. If a CTS message is received, the network device may communicate the second timer data to the neighboring network devices in a variety of ways.

公开(公告)号：US20180097591A1

公开(公告)日：2018-04-05

申请号：US15690820

申请日：2017-08-30

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Navid Abedini ,  Bilal Sadiq ,  Sundar Subramanian ,  Junyi Li

IPC: H04L5/00 ,  H04W74/08 ,  H04W72/00 ,  H04W72/04

Abstract: A RACH preamble is transmitted from a UE using multiple antenna ports. A UE splits a data stream containing a RACH preamble into multiple streams corresponding to a same number of antenna ports of the UE. The UE multiplexes the copies of the RACH preamble according to a multiplexing scheme that enables a receiving eNB to discern the different channels used to transmit the signal from the different antenna ports. A RACH procedure is further accomplished in two steps instead of four by the UE then splitting a RACH payload to the same number of streams and multiplexing the RACH payload for transmission to the eNB. The eNB receives both transmissions, and may use the RACH preamble as a reference signal, and responds with a combined message with control information, random access response, and contention resolution information.

公开(公告)号：US20180091204A1

公开(公告)日：2018-03-29

申请号：US15618815

申请日：2017-06-09

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Bilal Sadiq ,  Ashwin Sampath ,  Sundar Subramanian ,  Junyi Li ,  Vasanthan Raghavan

IPC: H04B7/06 ,  H04W72/04 ,  H04L5/00 ,  H04W24/10

CPC classification number: H04B7/0617 ,  H04B7/0456 ,  H04B7/0621 ,  H04B7/0695 ,  H04L5/0048 ,  H04W16/28 ,  H04W24/10 ,  H04W72/046 ,  H04W88/02

Abstract: Methods, systems, and devices for wireless communication are described. A network device, such as a base station, may transmit a set of reference symbols to a user equipment (UE). Each set of reference symbols may include two (or more) beamformed signals. The network device may receive, based on the set of reference symbols, a measurement report from the UE. The measurement report may include a co-phasing indicator associated with the set of reference symbols. The network device may identify, based at least in part on the measurement report, an antenna port precoder configuration to use for communicating with the UE.

公开(公告)号：US09900891B1

公开(公告)日：2018-02-20

申请号：US15685872

申请日：2017-08-24

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Junyi Li ,  Tao Luo ,  Bilal Sadiq ,  Sony Akkarakaran

IPC: H04W4/00 ,  H04W72/04 ,  H04W76/04 ,  H04L5/00 ,  H04W16/28 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W72/046 ,  H04B7/0695 ,  H04B7/088 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0055 ,  H04W16/28 ,  H04W36/0055 ,  H04W72/042 ,  H04W76/27 ,  H04W88/02 ,  H04W88/08

Abstract: In a process of beam change, the base station transmits a beam change instruction to a user equipment (UE) to indicate that the base station will change from a current beam to another beam, but the UE may not successfully receive the beam change instruction. The apparatus may be a base station that is configured to address such issues. The base station determines to change from a first beam to a second beam. The base station transmits, to a UE, a beam change instruction to indicate the determination to change to the second beam upon the determination to change to the second beam. The base station determines whether the UE has received the beam change instruction. The base station selects a third beam to communicate with the UE when the base station determines that the UE has not received the beam change instruction, wherein the third beam is a predefined beam.

公开(公告)号：US20180049167A1

公开(公告)日：2018-02-15

申请号：US15674168

申请日：2017-08-10

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Sundar Subramanian ,  Junyi Li ,  Navid Abedini ,  Bilal Sadiq

IPC: H04W72/04 ,  H04W72/02 ,  H04W56/00

CPC classification number: H04W74/0833 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/063 ,  H04B7/0695 ,  H04B7/088 ,  H04B7/2665 ,  H04B7/2668 ,  H04B7/2671 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/0051 ,  H04W16/28 ,  H04W48/20 ,  H04W56/00 ,  H04W56/001 ,  H04W72/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/046 ,  H04W72/085 ,  H04W72/1236 ,  H04W88/02 ,  H04W88/08

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a downlink (DL) signal from a base station on DL beam(s). The UE may identify a selected DL beam of the DL beam(s) for communications from the base station to the UE. The UE may transmit a random access channel (RACH) message to the base station using at least one of a resource or a RACH waveform selected based at least in part on the selected DL beam.

公开(公告)号：US20170288831A1

公开(公告)日：2017-10-05

申请号：US15357055

申请日：2016-11-21

Applicant: QUALCOMM Incorporated

Inventor： Juergen Cezanne ,  Sundar Subramanian ,  Muhammad Nazmul Islam ,  Bilal Sadiq ,  Ashwin Sampath ,  Junyi Li

IPC: H04L5/00 ,  H04L25/02 ,  H04W56/00 ,  H04W72/00 ,  H04W72/04

CPC classification number: H04L5/0048 ,  H04B7/0617 ,  H04L5/0053 ,  H04L25/0202 ,  H04L27/2613 ,  H04L27/2692 ,  H04W56/001 ,  H04W72/005 ,  H04W72/0453 ,  H04W72/046 ,  H04W72/0466

Abstract: Methods, systems, and devices for wireless communication are described. A base station may transmit a subframe that includes physical broadcast channel (PBCH) signals interspersed within beam reference signals, where the subframe may be a synchronization subframe including one or more synchronization signals. In some cases, the beam reference signals from different antenna ports may be code division multiplexed or frequency division multiplexed over multiple frequency tones. A user equipment (UE) may use the beam reference signals to generate channel estimates for the PBCH signals. In some cases, orthogonal cover codes for code division multiplexed signals may be selected to facilitate generation of channel estimates for PBCH signals transmitted using nearby frequency tones.

公开(公告)号：US12256401B2

公开(公告)日：2025-03-18

申请号：US17454040

申请日：2021-11-08

Applicant: QUALCOMM Incorporated

Inventor： Muhammad Nazmul Islam ,  Tao Luo ,  Sundar Subramanian ,  Bilal Sadiq ,  Juergen Cezanne ,  Junyi Li

IPC: H04W72/23 ,  H04L5/00 ,  H04W72/21 ,  H04W76/27 ,  H04L5/14 ,  H04W88/02

Abstract: The present disclosure relates to wireless communication in mmW networks. The apparatus may be a base station. The apparatus may be configured to determine a first symbol index and a second symbol index associated with downlink resources allocated to a UE. The first symbol index may indicate when the downlink resources begin in a subframe, and the second symbol index may indicate when the downlink resources end in the subframe. The apparatus may be configured to transmit an indication of the first symbol index and the second symbol index to the UE.

公开(公告)号：US12207293B2

公开(公告)日：2025-01-21

申请号：US17873827

申请日：2022-07-26

Applicant: QUALCOMM Incorporated

Inventor： Venkata Siva Prasad Rao Gude ,  Muhammad Nazmul Islam ,  Ambarish Tripathi ,  Daniel Alejandro Olmos ,  Vinesh Kisan Kaviskar

IPC: H04W74/08 ,  H04W72/04 ,  H04W74/00 ,  H04W74/0833

Abstract: Aspects relate to random access channel procedures. In some examples, if a user equipment (UE) has not successfully received a random access channel (RACH) downlink message prior to the end of a random access window for a first RACH attempt, the UE may elect to proceed with a second RACH attempt. For example, the UE may determine whether there are any remaining downlink symbols available during the random access window to receive the RACH downlink message. If not, the UE may retransmit a physical RACH (PRACH) preamble.