公开(公告)号：US12294429B2

公开(公告)日：2025-05-06

申请号：US18268909

申请日：2021-03-03

Applicant: QUALCOMM Incorporated

Inventor： Yiqing Cao ,  Peter Gaal ,  Alberto Rico Alvarino ,  Enoch Shiao-Kuang Lu ,  Wanshi Chen ,  Kazuki Takeda ,  Yan Li ,  Zhimin Du ,  Bin Han

IPC: H04B7/06 ,  H04L5/00

Abstract: A UE may determine a number of antenna ports associated with a frequency band that includes one or more CCs. The determined number of antenna ports may be based on a plurality of UL Tx chains for the one or more CCs/frequency band. The UE may switch from a first UL Tx chain to a second UL Tx chain, at least one of which may be associated with the one or more CCs/frequency band. The number of antenna ports may correspond to a maximum number of antenna ports of an individual CC of the one or more CCs, or to a sum of antenna ports of the one or more CCs. For the latter, the number of antenna ports may be limited to an available number of UE antenna ports when the sum of antenna ports is greater than the available number of UE antenna ports.

公开(公告)号：US20250126531A1

公开(公告)日：2025-04-17

申请号：US18694719

申请日：2022-10-26

Applicant: QUALCOMM INCORPORATED

Inventor： Yiqing Cao ,  Peter Gaal ,  Wanshi Chen ,  Juan Montojo ,  Timo Ville Vintola ,  Bin Han ,  Alberto Rico Alvarino ,  Yi Huang ,  Yan Li ,  Zhimin Du

IPC: H04W36/00 ,  H04W72/0453 ,  H04W72/1268

Abstract: Methods, systems, and devices for wireless communication are described. A device may transmit first control signaling indicating a capability for switching between carriers of a group of carriers during uplink communications using carrier aggregation. The group of carriers include three or more carriers that are each associated with different radio frequency bands. The device may receive second control signaling that includes an indication for the device to switch to a subset of carriers of the group of carriers for transmission of an uplink message. The subset of carriers may be associated with a combination of radio frequency bands. The device may transmit the uplink message on at least one of the subset of carriers in accordance with a mapping between the combination of radio frequency bands and the at least one of the subset of carriers, where the mapping is based on the capability.

公开(公告)号：US12279334B2

公开(公告)日：2025-04-15

申请号：US17796504

申请日：2020-03-20

Applicant: QUALCOMM Incorporated

Inventor： Yiqing Cao ,  Yan Li ,  Thomas Stockhammer ,  Zhimin Du

IPC: H04W76/40 ,  H04W76/10 ,  H04W76/30

Abstract: Aspects described herein relate to managing and/or configuring, for a user equipment (UE), unicast and/or multicast radio bearers for unicast and/or multicast cells based on measurement reports generated by the UE.

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.