公开(公告)号：US12261796B2

公开(公告)日：2025-03-25

申请号：US17635240

申请日：2019-08-16

Applicant: QUALCOMM Incorporated

Inventor： Yiqing Cao ,  Wanshi Chen ,  Juan Montojo

IPC: H04L5/14 ,  H04L5/00 ,  H04W74/0833

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station associated with a cell of a time division duplex communication system may determine a guard interval that is less than a maximum time delay, based at least in part on a radius of the cell, for air-to-ground communications; and transmit a scheduling configuration to a user equipment that identifies the guard interval. Numerous other aspects are provided.

公开(公告)号：US12250675B2

公开(公告)日：2025-03-11

申请号：US17768539

申请日：2019-11-01

Applicant: Qualcomm Incorporated ,  Chenxi Hao ,  Yiqing Cao ,  Bo Chen ,  Peter Gaal ,  Hao Xu

Inventor： Chenxi Hao ,  Yiqing Cao ,  Bo Chen ,  Peter Gaal ,  Hao Xu

IPC: H04W72/12 ,  H04W72/1268

Abstract: Methods, systems, and devices for wireless communications are described. In some cases, a user equipment (UE) may In support multiple component carriers that may be used to transmit uplink transmissions. One carrier may be used at a time such that the may switch between the carriers based on an uplink transmission schedule. In some cases, switching may be limited by a consecutive uplink switching rule or UE capability. In some cases, the gap between two consecutive uplink carrier switching operations may be limited to a resource (e.g., slot, symbol), such that the UE may expect to perform at most one switching operation per resource. In some implementations, the gap between two consecutive uplink carrier switching operations may be limited to a duration (e. g., 14 symbols, 4 symbols), such that the UE may expect to perform at most one switching operation per a duration less than or equal to a threshold.

公开(公告)号：US12232167B2

公开(公告)日：2025-02-18

申请号：US17753621

申请日：2019-10-02

Applicant: QUALCOMM Incorporated

Inventor： Xiao Feng Wang ,  Iyab Issam Sakhnini ,  Dan Zhang ,  Huilin Xu ,  Peter Gaal ,  Jun Ma ,  Yiqing Cao

IPC: H04W74/00 ,  H04W76/10

Abstract: Certain aspects of the present disclosure provide techniques for supporting multiple types of random access occasions. A method that may be performed by a user equipment (UE) includes receiving, from a base station (BS), an indication of at least two types of random access occasions (ROs) including a first RO type and a second RO type for communicating in a first coverage area of the BS as part of a random access process for the UE to establish a connection with the BS in the first coverage area. The method further includes transmitting, to the BS, a preamble on an RO of one of the first RO type or the second RO type, wherein a preamble format of the preamble is based on whether the RO is of the first RO type or the second RO type.

公开(公告)号：US12225592B2

公开(公告)日：2025-02-11

申请号：US17594704

申请日：2020-05-07

Applicant: QUALCOMM Incorporated

Inventor： Jing Lei ,  Seyong Park ,  Yiqing Cao ,  Peter Gaal ,  Wanshi Chen

IPC: H04W56/00 ,  H04L1/00 ,  H04L5/00 ,  H04W72/0446 ,  H04W74/00 ,  H04W74/0833

Abstract: Aspects are provided to support payloads for msgA transmission in a two-step random access (RACH) procedure by providing a one-to-many mapping arrangement between preambles and physical uplink shared channel (PUSCH) resource units (PRUs). A preamble is determined by the UE which is mapped to one or more groups of PRUs to support piggybacking of uplink control information (UCI), frequency hopping on PUSCH, and multiple-slot repetition for msgA transmissions. By piggybacking UCI to a payload in msgA, flexibility may be provided in the selection of MCS and waveform as well as resource allocation for demodulation reference signals (DMRS) and PUSCH in PRUs. Moreover, by allowing a payload to hop to different frequencies on PUSCH during the transmission of msgA, a gain in frequency diversity and interference averaging may be provided, and by enabling a payload to repeat across multiple slots in msgA transmission, coverage enhancement and/or reliability may be increased.

公开(公告)号：US12200777B2

公开(公告)日：2025-01-14

申请号：US17616764

申请日：2019-06-07

Applicant: Qualcomm Incorporated

Inventor： Jing Lei ,  Wanshi Chen ,  Joseph Binamira Soriaga ,  Linhai He ,  Ruiming Zheng ,  Seyong Park ,  Yiqing Cao ,  Naga Bhushan

IPC: H04W74/08 ,  H04L1/08 ,  H04W56/00 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/0453 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine a configuration of a retransmission of a first message of a random access procedure based on a set of transmission configuration options transmitted by a base station. For example, the UE may transmit the first message but may reconfigure the first message for the retransmission based on the transmission configuration options. Additionally, the UE may configure a set of transmission configuration states based on the transmission configuration options for transmitting/retransmitting the first message. In some cases, the UE may determine to switch transmission configuration states based on a trigger signaled by the base station and/or a determination by the UE. Additionally, the UE may transmit an indication of a log of state transitions performed prior to a retransmission of the first message to facilitate combining of the retransmissions at the base station.

公开(公告)号：US12171001B2

公开(公告)日：2024-12-17

申请号：US17240844

申请日：2021-04-26

Applicant: QUALCOMM Incorporated

Inventor： Peter Gaal ,  Yi Huang ,  Yiqing Cao

IPC: H04W72/21 ,  H04W72/0453 ,  H04W72/1268 ,  H04W72/23

Abstract: A base station (BS) may determine (estimate) a preparation time for at least one uplink (UL) transmission by a user equipment (UE) on at least one radio frequency (RF) carrier. The BS may use the preparation time to ensure that the BS sends a grant for the at least one transmission to the UE a sufficient amount of time before the at least one transmission is scheduled to occur to give the UE sufficient time to conduct the at least one UL transmission. In some examples, the BS determines the preparation time based on adjusting an uplink preparation time according to a defined value. In some examples, the BS determines the preparation time based on a subcarrier spacing (SCS) index. The BS may select the SCS index used to determine the preparation time from smallest of the SCS indexes configured for the different RF carriers.

公开(公告)号：US12160904B2

公开(公告)日：2024-12-03

申请号：US17616764

申请日：2019-06-07

Applicant: Qualcomm Incorporated

Inventor： Jing Lei ,  Wanshi Chen ,  Joseph Binamira Soriaga ,  Linhai He ,  Ruiming Zheng ,  Seyong Park ,  Yiqing Cao ,  Naga Bhushan

IPC: H04W74/08 ,  H04L1/08 ,  H04W56/00 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/0453 ,  H04W74/0833

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may determine a configuration of a retransmission of a first message of a random access procedure based on a set of transmission configuration options transmitted by a base station. For example, the UE may transmit the first message but may reconfigure the first message for the retransmission based on the transmission configuration options. Additionally, the UE may configure a set of transmission configuration states based on the transmission configuration options for transmitting/retransmitting the first message. In some cases, the UE may determine to switch transmission configuration states based on a trigger signaled by the base station and/or a determination by the UE. Additionally, the UE may transmit an indication of a log of state transitions performed prior to a retransmission of the first message to facilitate combining of the retransmissions at the base station.

公开(公告)号：US12156167B2

公开(公告)日：2024-11-26

申请号：US17759073

申请日：2020-02-07

Applicant: QUALCOMM Incorporated

Inventor： Qiang Wu ,  Xiao Feng Wang ,  Huilin Xu ,  Iyab Issam Sakhnini ,  Dan Zhang ,  Yiqing Cao ,  Jun Ma

IPC: H04W64/00

Abstract: Disclosed are techniques for positioning. A receiver receives complementary timing information associated with the positioning reference signals (PRS) of a repetition of a PRS sequence. The complementary timing information distinguishes a repetition of a PRS sequence from remaining repetitions of the PRS sequence. Based on the complementary timing information associated with different PRS from different non-terrestrial vehicles indicating that the PRS were transmitted during the same radio frame, the receiver can determine an observed time difference of arrival (OTDOA) between the PRS received from the respective non-terrestrial vehicles.

公开(公告)号：US12137476B2

公开(公告)日：2024-11-05

申请号：US17776640

申请日：2019-11-14

Applicant: Qualcomm Incorporated

Inventor： Qiaoyu Li ,  Chao Wei ,  Hao Xu ,  Huilin Xu ,  Jing Lei ,  Peter Pui Lok Ang ,  Wanshi Chen ,  Le Liu ,  Yiqing Cao ,  Peter Gaal

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

Abstract: A low complexity user equipment (UE) may be in communication with another UE (e.g., with a premium UE or more capable UE) via a device-to-device communication link (e.g., via sidelink), and the low complexity UE may leverage the device-to-device link to improve (e.g., simplify, expedite, etc.) random access procedures performed by the low complexity UE. For example, a low complexity UE may request contention free random access (CFRA) resources via the device-to-device link with another UE. Another device (e.g., another UE in device-to-device communication with the low complexity UE) may receive the request from the low complexity UE and forward the request to the network (e.g., to a base station). The network may then configure CFRA resources for the low complexity UE. Upon receiving the CFRA configuration, the low complexity UE may perform a random access procedure (e.g., a CFRA procedure) with the network (e.g., with the base station) accordingly.

公开(公告)号：US12047330B2

公开(公告)日：2024-07-23

申请号：US17309615

申请日：2019-12-27

Applicant: QUALCOMM Incorporated

Inventor： Yiqing Cao ,  Huilin Xu ,  Yuwei Ren ,  Tingfang Ji

IPC: H04L5/00 ,  H04W72/044 ,  H04W72/1268

CPC classification number: H04L5/0094 ,  H04L5/0051 ,  H04L5/0062 ,  H04W72/044 ,  H04W72/1268

Abstract: Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a base station (BS) may receive a first downlink determining, based at least in part on an uplink transmission schedule for a user equipment (UE), one or more communications that are to be transmitted as a cross link interference reference signal (CLI-RS) during a time window. The BS may transmit, to the UE, an instruction to transmit the one or more communications as the CLI-RS during the time window. Numerous other aspects are provided.