公开(公告)号：US20240147506A1

公开(公告)日：2024-05-02

申请号：US18486065

申请日：2023-10-12

Applicant: MEDIATEK INC.

Inventor： Guan-Yu Lin ,  Chia-Hao Yu

IPC: H04W72/40 ,  H04W28/26 ,  H04W76/14

CPC classification number: H04W72/40 ,  H04W28/26 ,  H04W76/14

Abstract: Apparatus and methods are provided for dynamic sidelink (SL) resource allocation. In one novel aspect, one or more uplink (UL) resources are allocated for SL transceiving. In one embodiment, the UE establishes an SL connection with an SL peer UE, receives an allocation indication indicating one or more UL resources are available as shared SL resources for SL transceiving, wherein the allocation indication is originated from a gNB, and performs SL data transceiving with the SL peer UE using the one or more UL resources indicated in the allocation indication. In one embodiment, the UE receives the allocation indication through the Uu connection by unicast, multicast or broadcast. In one embodiment, the shared SL resources are indicated by RB ID or by SL grants. In one embodiment, conditions for using the shared SL resources are included in the allocation indication or are indicated in a separate RRC configuration.

公开(公告)号：US20240040419A1

公开(公告)日：2024-02-01

申请号：US18220375

申请日：2023-07-11

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Din-Hwa Huang ,  Pei-Kai Liao

IPC: H04W24/10 ,  H04L5/00 ,  H04W36/00

CPC classification number: H04W24/10 ,  H04L5/0051 ,  H04W36/0085

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and a wireless communication system including a control device and one or more cells are provided. The control device configures triggering conditions for a user equipment (UE) to initiate transmission of specific uplink (UL) reference signals for UL radio resource management (RRM) measurements. The one or more cells detect the specific UL reference signals transmitted by the UE on specific UL RRM resources based on a reference timing when the triggering conditions are met at the UE. The one or more cells measure the specific UL reference signals to obtain measurement results. The control device decides for a carrier change or a cell change based on the measurement results of the one or more cells. The control device indicates to the UE a set of selected cells or carriers for the UE to connect.

公开(公告)号：US20230112574A1

公开(公告)日：2023-04-13

申请号：US17939875

申请日：2022-09-07

Applicant: MEDIATEK INC.

Inventor： LI-CHUAN TSENG ,  Chia-Hao Yu

IPC: H04W36/00 ,  H04W74/08 ,  H04W56/00 ,  H04W74/00

Abstract: A method of acquiring timing advance (TA) for neighbor cells to reduce latency and interruption for inter-cell mobility is proposed. A UE is configured with a set of active cells for fast cell-switching. A neighbor cell in the active set is likely to be UE’s target cell. To reduce handover interruption, the UE acquires and maintains the TA corresponding to the cells in the active set. The UE performs early RACH for potential target cells and obtains the TA of the potential target cells. Once the UE receives handover command indicating one of the active cells as target cell, the UE can complete the handover without performing RACH again.

公开(公告)号：US20230095823A1

公开(公告)日：2023-03-30

申请号：US17945053

申请日：2022-09-14

Applicant: MEDIATEK INC.

Inventor： LI-CHUAN TSENG ,  Chia-Hao Yu ,  Kuan-Hung Chou ,  Chia-Chun Hsu ,  Yih-Shen Chen

IPC: H04W36/00 ,  H04W36/08 ,  H04W56/00

Abstract: A method of configuring a set of active cells among neighboring cells to reduce latency and interruption for inter-cell mobility is proposed. The set of active cells is an active set of cells among which UE can do fast cell switching. The set of active cells is configured by the network based on UE measurement report or network deployment information. UE maintains the configuration and can perform pre-synchronization to the configured active cells in downlink (DL) only or in both DL and uplink (UL). UE maintains the DL/UL synchronization with the active cells, and applies configuration once UE is indicated to switch to an active cell as the target cell. Because UE maintains the configuration and DL/UL timing of the target cell before receiving the cell-switch command, the mobility latency and interruption time for inter-cell mobility is reduced.

公开(公告)号：US20230090834A1

公开(公告)日：2023-03-23

申请号：US17861538

申请日：2022-07-11

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Chia-Hao Yu

IPC: H04W24/04 ,  H04W24/08 ,  H04L5/00

Abstract: A beam failure recovery (BFR) procedure is proposed. The network node may allocate one or more New-Beam-Identification Reference-Signal (NBI-RS) resource sets for a user equipment (UE) and report the allocated NBI-RS resource sets to the UE, wherein the NBI-RS resource sets may be associated with a serving Transmission and Reception Point (TRP) and at least one candidate TRP. The UE may perform a beam failure detection (BFD) procedure to determine whether a beam failure happens, perform a New Beam Identification (NBI) procedure based on the NBI-RS resource sets allocated by the network nodel, and perform a recovery procedure to a serving TRP or a candidate TRP to reduce the latency of conventional recovery procedure.

公开(公告)号：US20230089145A1

公开(公告)日：2023-03-23

申请号：US17861568

申请日：2022-07-11

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Chia-Hao Yu

IPC: H04B7/08 ,  H04W56/00

Abstract: A new beam identification method is proposed. The UE determines whether a quality of at least one NBI-RS resource associated with a serving Transmission and Reception Point (TRP)is larger than or equal to a first threshold. The UE determines whether a quality of at least one NBI-RS resource associated with at least one candidate TRP is larger than or equal to a second threshold. The UE selects a new beam for a recovery procedure based on determining results associated with the serving TRP and the at least one candidate TRP.

公开(公告)号：US10708789B2

公开(公告)日：2020-07-07

申请号：US15935386

申请日：2018-03-26

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau ,  Chia-Hao Yu

IPC: H04W16/28 ,  H04L5/00 ,  H04W74/08 ,  H04W72/04 ,  H04W74/00

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a cellular station. The controller selects a downlink reference signal associated with a candidate beam among a plurality of downlink reference signals including Channel State Information-Reference Signal (CSI-RS) resources, Synchronization Signal (SS) blocks, or Physical Broadcast Channel (PBCH) blocks, and determines one from a plurality sets of Physical Random Access Channel (PRACH) preambles and RACH occasions for the selected downlink reference signal according to an association configured between the downlink reference signals and PRACH resources. Also, the controller uses the determined set of PRACH preamble and RACH occasion to perform a PRACH transmission to the cellular station via the wireless transceiver.

公开(公告)号：US10542545B2

公开(公告)日：2020-01-21

申请号：US15888250

申请日：2018-02-05

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Yuanyuan Zhang ,  Ming-Po Chang ,  Jiann-Ching Guey

IPC: H04L1/16 ,  H04W72/04 ,  H04B17/318 ,  H04W74/08

Abstract: A method of beam failure recovery for multi-beam operation in wireless communication systems with beamforming is proposed. Specifically, a four-step beam failure recovery procedure is proposed. In a first step of beam failure detection, UE detects a beam failure condition of the original serving beam pair link. In a second step of new candidate beam identification, UE performs measurements for candidate beam selection. In a third step of beam failure recovery request (BFRQ) transmission, UE transmits a BFRQ message to BS upon the triggering condition for BFRQ transmission is satisfied. In a fourth step of monitoring BS response, UE monitors BS response to decide the success or failure of the beam failure recovery.

公开(公告)号：US10396873B2

公开(公告)日：2019-08-27

申请号：US14723706

申请日：2015-05-28

Applicant: MEDIATEK INC.

Inventor： Jiann-Ching Guey ,  Chia-Hao Yu ,  Ming-Po Chang

IPC: H04B7/06 ,  H04W74/08 ,  H04L5/00 ,  H04W72/04

Abstract: A method of control signaling in a beamforming system is proposed. A user equipment (UE) receives control beam transmission from a base station using a set of control beams in a beamforming network. Each control beam comprises a set of DL control resource blocks, a set of UL control resource blocks, and an associated set of beamforming weights. The UE selects a control beam for establishing a connection with the base station. The UE then performs random access with the base station using the selected control beam.

公开(公告)号：US20190081689A1

公开(公告)日：2019-03-14

申请号：US16126546

申请日：2018-09-10

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Yuanyuan Zhang ,  Hsuan-Li Lin ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04B7/08 ,  H04W72/04 ,  H04W36/06 ,  H04W74/08 ,  H04W24/10

Abstract: A method for harmonized operation between radio link monitor and beam failure recovery is proposed. In one example, upon indication of unsuccessful recovery from beam failure, a counter is initiated to count a configured number of OOS indication before RLF is declared due to beam failure. In another example, upon indication of successful recovery from beam failure, a counter is initiated to count a configured number of IS indication before starting over RLM procedure on its previous observations on failed beams. As a result, either early RLF declaration or RLM reset may be triggered based on BFR procedure to more accurately maintain the link quality.