公开(公告)号：US10798640B2

公开(公告)日：2020-10-06

申请号：US15862641

申请日：2018-01-05

Applicant: MEDIATEK INC.

Inventor： Chien-Chun Huang-Fu ,  Per Johan Mikael Johansson ,  Guillaume Sebire ,  Yuanyuan Zhang

IPC: H04W48/06 ,  H04W28/02

Abstract: A generic access control procedure is proposed. Every action that is subject to access control is associated with an access category, and each access category is in turn associated with a set of access control parameters. From the APP layer, a UE detects an action that is subject to access control. The UE obtains and stores access categorization rules. In NAS layer, the UE determines the access category for the action. The UE then determines the set of access control parameters for the action. In AS layer, the UE finally applies the set of access control parameters to the action and makes a barring decision for the action. By defining a generic access control procedure and separating access control functions into NAS layer and AS layer, the generic access control is simplified and extendible.

公开(公告)号：US10555324B2

公开(公告)日：2020-02-04

申请号：US16054885

申请日：2018-08-03

Applicant: MEDIATEK INC.

Inventor： Aimin Justin Sang ,  Yuanyuan Zhang

IPC: H04W72/08 ,  H04W72/04 ,  H04W24/08 ,  H04W76/27 ,  H04W76/15 ,  H04W28/08

Abstract: A novel Macro-assisted Multi-Connectivity (MC) mobility scheme for UEs traversing clusters of (mmWave) small cells (small-BS or SBS) under the coverage of the same 5G or LTE Macro-cell (macro-BS or MBS) is proposed. It keeps the same Control/User split scheme and C-Plane anchor at MBS, same as in LTE Dual Connectivity (DuCo or DC), yet extending DuCo with a multi-connectivity split bearer user plane. For example, MBS adopts a multi-way packet data convergence protocol (PDCP) bearer split based on routing weighted by channel quality, SBS's resource availability, etc. with or without inter-BS flow control. Utilizing the MC user plane, a macro-assisted make-before-break MC mobility can be enabled.

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：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.

公开(公告)号：US20180199263A1

公开(公告)日：2018-07-12

申请号：US15862641

申请日：2018-01-05

Applicant: Mediatek Inc.

Inventor： Chien-Chun Huang-Fu ,  Per Johan Mikael Johansson ,  Guillaume Sebire ,  Yuanyuan Zhang

IPC: H04W48/06 ,  H04W28/02

Abstract: A generic access control procedure is proposed. Every action that is subject to access control is associated with an access category, and each access category is in turn associated with a set of access control parameters. From the APP layer, a UE detects an action that is subject to access control. The UE obtains and stores access categorization rules. In NAS layer, the UE determines the access category for the action. The UE then determines the set of access control parameters for the action. In AS layer, the UE finally applies the set of access control parameters to the action and makes a barring decision for the action. By defining a generic access control procedure and separating access control functions into NAS layer and AS layer, the generic access control is simplified and extendible.

公开(公告)号：US20170374589A1

公开(公告)日：2017-12-28

申请号：US15697636

申请日：2017-09-07

Applicant: MEDIATEK INC.

Inventor： Aimin Justin Sang ,  Yu-Syuan Jheng ,  Yuanyuan Zhang

IPC: H04W36/04 ,  H04W16/32 ,  H04W76/02 ,  H04W84/04

Abstract: Millimeter-wave (mmWave) band communication is a very promising technology for 5G small cells. In practice, such a new system will coexist with legacy or evolved microwave band systems, such as E-UTRAN LTE macro-cell cellular systems, for a long time to come. Considering the typical scenarios where a macro cell offers umbrella coverage for clusters of small cells, several user plane (U-plane) architectural choices of macro-assisted 5G mmWave systems from both UE and network's perspectives are evaluated. The proposed On-demand Reconfiguration U-Plane Architecture (ORUA) for Macro-assisted Millimeter Wave (mmWave) small cells is designed to meet 5G expectations of dense deployment of small cells and UEs and beamformed intermittent Gbps links.

公开(公告)号：US09794839B2

公开(公告)日：2017-10-17

申请号：US14636441

申请日：2015-03-03

Applicant: MEDIATEK INC.

Inventor： Shiang-Jiun Lin ,  Yuanyuan Zhang ,  Per Johan Mikael Johansson

IPC: H04L1/00 ,  H04W36/00 ,  H04W24/04 ,  H04W76/02 ,  H04L5/00

CPC classification number: H04W36/0072 ,  H04L5/001 ,  H04W24/04 ,  H04W36/0055 ,  H04W36/0061 ,  H04W76/15 ,  H04W76/19

Abstract: A method of radio link monitoring (RLM) and radio link failure (RLF) handling over a small cell network is proposed. In a wireless network, a user equipment (UE) establishes a radio resource control (RRC) connection with a base station (eNB), which is UE anchor. The UE applies carrier aggregation for multiple component carriers (CCs) configured as multiple serving cells. The aggregated serving cells are served by the anchor eNB and other drift eNB(s). The UE performs RLM/RLF over PCELL and SCELL belonging to corresponding cell groups. When RLF happens in a serving cell, the UE and the eNB apply certain actions over the serving cell or all serving cells in the group. RLF procedures in anchor eNB and in drift eNB are proposed. Both UE side and network side behaviors are included.

公开(公告)号：US11546820B2

公开(公告)日：2023-01-03

申请号：US17289064

申请日：2019-10-17

Applicant: MEDIATEK INC.

Inventor： Chun-Fan Tsai ,  Yuanyuan Zhang

IPC: H04W4/00 ,  H04W36/18 ,  H04W76/30 ,  H04W36/08 ,  H04W60/06

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 first cellular station and a second cellular station. The controller continues to send or receive UP data to or from the first cellular station via the wireless transceiver after receiving a handover command message for a handover of the UE from the first cellular station to the second cellular station, and receives a Radio Resource Control (RRC) request message from the second cellular station via the wireless transceiver after sending a handover complete message to the second cellular station. Also, the controller detaches from the first cellular station in response to receiving the RRC request message.

公开(公告)号：US10749639B2

公开(公告)日：2020-08-18

申请号：US15878084

申请日：2018-01-23

Applicant: MEDIATEK INC.

Inventor： Yu-Syuan Jheng ,  Yuanyuan Zhang ,  Yuan-Wen Ting ,  Pei-Shan Kao

IPC: H04W36/14 ,  H04L1/18 ,  H04L1/16 ,  H04W28/02 ,  H04B17/391 ,  H04W76/20 ,  H04W76/15 ,  H04W36/08 ,  H04L12/801 ,  H04B17/318 ,  H04B17/336 ,  H04W24/10

Abstract: A wireless transmit receive unit (WTRU) is configured in dual connectivity with a master cell group and a secondary cell group. Uplink (UL) data is sent in an active one of the master cell group and the secondary cell group as an active UL transmission cell group. It is determined whether a UL transmission is to be switched to an alternate one of the master cell group and the secondary cell group and the UL traffic is switched from the active UL transmission cell group to the alternate cell group in response to the determination that the UL transmission is to be switched.

公开(公告)号：US10674383B2

公开(公告)日：2020-06-02

申请号：US16043718

申请日：2018-07-24

Applicant: MEDIATEK INC.

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

IPC: H04W24/04 ,  H04W72/04 ,  H04W74/08 ,  H04B7/06 ,  H04B7/08 ,  H04W16/28

Abstract: A method of beam failure recovery request (BFRQ) transmission is proposed. In a first step of beam failure detection, UE detects a beam failure condition of the original serving beam. 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 BFRQ transmission attempt. In one advantageous aspect, the BFRQ transmission is over dedicated contention-free PRACH or PUCCH resources or over contention-based PRACH resources. Furthermore, a beam failure recovery timer is used to oversee the initiation and the termination of the BFRQ transmission.