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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
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.
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22.发明授权公开(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
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.
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公开(公告)号：US11991572B2
公开(公告)日：2024-05-21
申请号：US17417549
申请日：2019-09-30
Applicant: MEDIATEK INC.
Inventor： Li-Chuan Tseng , Yuanyuan Zhang , Yung-Hsiang Liu , Chun-Fan Tsai , Chia-Chun Hsu
CPC classification number: H04W36/00837 , H04W36/0058 , H04W36/0061 , H04W36/0085 , H04W36/36
Abstract: Methods and apparatus are provided for UE-triggered handover and early preparation with coexistence of the network-triggered handover. In one novel aspect, the UE is configured early measurement report configuration, receives an early handover command from the serving base station with a handover candidate cell list, monitors handover triggering conditions for each candidate cell on the handover candidate cell list based on a UE-triggered handover configuration and performs the UE-triggered handover to a candidate cell when the corresponding triggering condition is met for the candidate cell. In one embodiment, the UE receives a network-triggered handover command to a target cell, suspends the UE-triggered handover configuration and performs the network-triggered handover to the target cell. The UE discards the UE-triggered handover configuration upon success of the network-triggered handover and resumes the UE-triggered handover configuration upon failure of the network-triggered handover.
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公开(公告)号：US11206563B2
公开(公告)日：2021-12-21
申请号：US16242249
申请日：2019-01-08
Applicant: MEDIATEK INC.
Inventor： Chun-Fan Tsai , Li-Chuan Tseng , Tsang-Wei Yu , Yuanyuan Zhang
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 service network and a second service network. The controller receives a Radio Resource Control (RRC) message comprising a measurement configuration for SFN (System Frame Number) and Frame Timing Difference (SFTD) from the first service network via the wireless transceiver, performs first SFTD measurements between a Primary Cell (PCell) of the first service network and neighbor cells of the second service network via the wireless transceiver in response to the measurement configuration for SFTD indicating the neighbor cells, and sends a result of the first SFTD measurements to the first service network via the wireless transceiver.
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公开(公告)号：US20210337441A1
公开(公告)日：2021-10-28
申请号：US17369886
申请日：2021-07-07
Applicant: MEDIATEK INC.
Inventor： Yuanyuan Zhang , Chia-Chun Hsu
Abstract: Apparatus and methods are provided for mobility interruption reduction with multi-RA dual-connectivity (MR-DC). In novel aspect, the UE with configured transceiver data with at least one source nodes, suspends data transceiving with the first source node upon receiving a reconfiguration message from one of the source nodes, keeps data transceiving with the second source node when accessing a first target node, wherein the second source node is one of the source nodes with active data transceiving with the UE, and suspends data transceiving with the second source node when accessing a second target node if configured. In some embodiments, the UE either keeps the source SN or the source MN while accessing the target MN or target SN by suspending the source MN or source SN.
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Patent Agency Ranking
公开(公告)号：US10555227B2
公开(公告)日：2020-02-04
申请号：US15697636
申请日：2017-09-07
Applicant: MEDIATEK INC.
Inventor： Aimin Justin Sang , Yu-Syuan Jheng , Yuanyuan Zhang
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.
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公开(公告)号：US10516465B2
公开(公告)日：2019-12-24
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
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.
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公开(公告)号：US20190037423A1
公开(公告)日：2019-01-31
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
CPC classification number: H04W24/04 , H04B7/06 , H04B7/0695 , H04B7/088 , H04W16/28 , H04W72/0413 , H04W74/0833
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.
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公开(公告)号：US10045360B2
公开(公告)日：2018-08-07
申请号：US15099708
申请日：2016-04-15
Applicant: MEDIATEK INC.
Inventor： Aimin Justin Sang , Yuanyuan Zhang
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.
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公开(公告)号：US10009072B2
公开(公告)日：2018-06-26
申请号：US15345752
申请日：2016-11-08
Applicant: MEDIATEK INC.
Inventor： Aimin Justin Sang , Chia-Hao Yu , Yuanyuan Zhang , Jiann-Ching Guey
CPC classification number: H04B7/0408 , H04B7/0619 , H04B7/0695 , H04B7/0697 , H04J4/00 , H04J13/00 , H04L1/0003 , H04W36/0055 , H04W36/0079 , H04W72/042 , H04W72/0446 , H04W72/0453 , H04W72/046
Abstract: A method of providing spatial diversity for critical data delivery in a beamformed mmWave smallcell is proposed. The proposed spatial diversity scheme offers duplicate or incremental data/signal transmission and reception by using multiple different beams for the same source and destination. The proposed spatial diversity scheme can be combined with other diversity schemes in time, frequency, and code, etc. for the same purpose. In addition, the proposed spatial diversity scheme combines the physical-layer resources associated with the beams with other resources of the same or different protocol layers. By spatial signaling repetition to avoid Radio Link Failure (RLF) and Handover Failure (HOF), mobility robustness can be enhanced. Mission-critical and/or time-critical data delivery can also be achieved without relying on retransmission.
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