公开(公告)号：US20240080901A1

公开(公告)日：2024-03-07

申请号：US18262369

申请日：2021-04-01

Applicant: QUALCOMM Incorporated

Inventor： Kamalakar GANTI ,  Anindya MAJUMDER ,  Ammar KITABI ,  Jun HU ,  Ling XIE ,  Qingxin CHEN

IPC: H04W74/08 ,  H04B7/08

CPC classification number: H04W74/0833 ,  H04B7/088 ,  H04W88/06

Abstract: Methods, systems, and devices for wireless communication are described. A user equipment (UE) may be configured with two subscriber identity modules (SIMs). The UE may select a synchronization beam associated with a random access occasion of a first SIM based on the random access occasion not overlapping in time with a reception opportunity (e.g., a paging occasion) of the second SIM. In some examples, the UE may select the synchronization beam based on an identified signal quality of the synchronization beam (e.g., in comparison to other available synchronization beams that are non-overlapping with the reception opportunity). The UE may perform a random access procedure (e.g., using the first SIM) during the random access occasion associated with the selected synchronization beam and, in some cases, may also monitor (e.g., using the second SIM) resources associated with the paging opportunity.

公开(公告)号：US20240049095A1

公开(公告)日：2024-02-08

申请号：US18258933

申请日：2021-03-05

Applicant: QUALCOMM Incorporated

Inventor： Zhanyi LIU ,  Ling XIE ,  Chinmay Shankar VAZE ,  Xuqiang ZHANG

IPC: H04W36/32

CPC classification number: H04W36/32

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for a user equipment (UE) using information identified via radio access technology (RAT) (e.g., Long Term Evolution (LTE)) to support communications in another RAT (e.g., New Radio (NR)). For example, the UE may receive, from a first base station operating according to a first radio access technology an indication of a high speed associated with a first wireless connection of the UE with the first base station. The UE may perform a channel estimation procedure for the first wireless connection to generate a Doppler value based on receiving the indication. The UE may apply the generated Doppler value to a frequency tracking loop or a time tracking loop for communications with a second base station via a second wireless connection, wherein the second base station is operating according to a second RAT.

公开(公告)号：US20230262543A1

公开(公告)日：2023-08-17

申请号：US18003708

申请日：2020-08-07

Applicant: QUALCOMM Incorporated

Inventor： Ling XIE ,  Tom CHIN ,  Reza SHAHIDI ,  Qingxin CHEN

IPC: H04W36/00 ,  H04L5/00 ,  H04W72/02

CPC classification number: H04W36/0072 ,  H04L5/0096 ,  H04W72/02 ,  H04W88/06

Abstract: Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques that may help optimize performance of a multi-SIM UE. According to certain aspects, the multi-SIM UE may determine a preferred frequency resource for the UE to support at least two subscriber identity modules (SIMs), at least one of which is connected and one of which is idle and provide, via the at least one connected SIM, an indication of the preferred frequency resource to a network entity.

公开(公告)号：US20230044975A1

公开(公告)日：2023-02-09

申请号：US17791615

申请日：2021-01-09

Applicant: QUALCOMM Incorporated

Inventor： Yiqing CAO ,  Yan LI ,  Ling XIE ,  Jie MAO ,  Kepei TANG ,  Bin HAN

IPC: H04W56/00 ,  H04L5/14

Abstract: Techniques and apparatus for achieving multi-cell synchronization for dual connectivity and carrier aggregation are described. In one technique, a timing difference between a first base station (BS) and a second BS is determined, where the first BS is in an asynchronous timing configuration with respect to the second BS. A measurement configuration for measuring signal(s) from the second BS is determined, based on the timing difference. The measurement configuration is signaled to a user equipment (UE) served by the first BS. The UE performs a measurement procedure for the signal(s) in accordance with the measurement configuration. In another technique, the second BS receives a synchronization request, which includes a first time stamp, from the first BS via a network interface between the first BS and the second BS. The second BS sends a synchronization response, which includes a second time stamp, to the first BS.

公开(公告)号：US20220386172A1

公开(公告)日：2022-12-01

申请号：US17755145

申请日：2019-11-25

Applicant: QUALCOMM Incorporated

Inventor： Ling XIE ,  Qingxin CHEN ,  Reza SHAHIDI ,  Jun HU ,  Sivaram Srivenkata PALAKODETY ,  Vishal DALMIYA ,  Wei-Jei SONG ,  Arnaud MEYLAN ,  Zhibin DANG ,  Karthikeyan SABAPATHI

IPC: H04W28/08 ,  H04W28/02 ,  H04W76/15

Abstract: A user equipment (UE) configured for dual connectivity with a split bearer configuration may transmit uplink data packets to one or both a master cell group (MCG) and a secondary cell group (SCG). The UE may transmit an uplink transmission from a packet data convergence protocol (PDCP) entity over one or both of a first radio link control (RLC) entity associated with the MCG and a second RLC entity associated with the SCG. The configuration including a transmit buffer threshold. The UE may receive, at the PDCP entity, an uplink switch start indication. The UE may activate the second RLC entity in response to receiving the uplink switch start indication. The UE may transmit a buffer status report according to a current transmit buffer level plus the transmit buffer threshold. Accordingly, the UE may communicate with the SCG based on the uplink switch start indication.