公开(公告)号：US10420079B2

公开(公告)日：2019-09-17

申请号：US15473622

申请日：2017-03-30

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Yih-Shen Chen ,  Chien-Chang Li ,  Bo-Si Chen

IPC: H04W72/04 ,  H04W52/14 ,  H04W72/10 ,  H04W72/08 ,  H04L5/00 ,  H04W84/04 ,  H04W52/16 ,  H04W52/28

Abstract: Methods and apparatus are provided for control overhead reduction. The UE configures one or more short transmission time interval regions over a normal TTI region shared by the UE and one or more other, each UE includes a self-contained control information sPDCCH occupying a control information region. The UE detects a cover signal, which indicates one or more resource elements in the sPDCCH control-information region that can be used for data transmission. The UE obtains data transmission from the REs in the SPDCCH control information region based on the detected cover signal. In one embodiment, the cover signal is a dedicated signal. In another embodiment, the cover signal is a common signal. In yet another embodiment, the cover signal is encoded in a downlink control information (DCI) intended for the UE. In one embodiment, the cover signal indicates one or more CCE REs to be excluded for data transmission.

公开(公告)号：US20190045404A1

公开(公告)日：2019-02-07

申请号：US16053799

申请日：2018-08-03

Applicant: MEDIATEK INC.

Inventor： Chun-Fan Tsai ,  Yih-Shen Chen

IPC: H04W36/00 ,  H04W76/16 ,  H04W88/06 ,  H04W24/10 ,  H04W76/19

Abstract: A method of supporting fast dual connectivity (DC) configuration after fallback in a 4G/5G network is proposed. A UE is configured with MR-DC (Multi-RAT Dual Connectivity) and is connected to both LTE/NR RAT in LTE/NR serving cells of master cell group (MCG) and secondary cell group (SCG). The UE has to fall back to legacy 2G/3G RAT and is forced to release the DC configuration. The UE records the serving cell information before fallback procedure and sends assistant information of the DC configuration to the network after fallback procedure. The assistant information comprises the stored serving cell information and optional additional measurement results for candidate SCG cells. The assistant information allows the network to resume the highspeed data transmission soon after the fallback procedure.

公开(公告)号：US10091793B2

公开(公告)日：2018-10-02

申请号：US15016431

申请日：2016-02-05

Applicant: MEDIATEK INC.

Inventor： Li-Chun Ko ,  Yih-Shen Chen ,  Yu-Ting Chen ,  Chung-Wei Wang ,  Yi-Chien Wang

IPC: H04W72/08 ,  H04W76/28 ,  H04L5/00 ,  H04L5/22 ,  H04W76/04 ,  H04W16/14 ,  H04W72/04 ,  H04W88/06

Abstract: A UE controls in-device coexistence (IDC) indication message generation to mitigate potential throughput impact on UE to maintain UE performance as much as possible. Under the proposed method, FDM-based solution is always preferred by the UE. Based on the IDC indication message generated by the UE, a network applies an IDC interference mitigation solution that prioritizes FDM-based solution. Specifically, the UE first sends an IDC message requesting FDM-based solution. In case the serving eNB does not respond, the UE sends a new IDC message by alternating IDC option. Even if a TDM-based solution has been received, the UE may continue requesting FDM-based solution to gain UE performance.

公开(公告)号：US10080109B2

公开(公告)日：2018-09-18

申请号：US15249552

申请日：2016-08-29

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Chia-Chun Hsu ,  Yih-Shen Chen ,  Chien-Chun Huang-Fu ,  Yu-Syuan Jheng

IPC: H04B7/00 ,  H04W4/08 ,  H04W4/10 ,  H04W76/40 ,  H04W36/32 ,  H04W4/06 ,  H04W72/00 ,  H04W36/08 ,  H04W76/00 ,  H04W74/00 ,  H04L5/00 ,  H04L12/18 ,  H04W24/08 ,  H04W36/00 ,  H04W36/30 ,  H04W72/12

CPC classification number: H04W4/08 ,  H04L5/0037 ,  H04L12/185 ,  H04L12/1886 ,  H04W4/06 ,  H04W4/10 ,  H04W24/08 ,  H04W36/0007 ,  H04W36/0083 ,  H04W36/08 ,  H04W36/30 ,  H04W36/32 ,  H04W72/00 ,  H04W72/005 ,  H04W72/121 ,  H04W74/006 ,  H04W76/40

Abstract: A method of supporting group communication over LTE MBMS is provided. A UE first establishes a unicast Evolved Packet Service (EPS) bearer in an LTE network for group communication. The UE belongs to a communication group having a communication group ID. The UE receives access information from the network for monitoring downlink (DL) multicast traffic of the DL group communication based on a multicast decision. The UE is then ready for monitoring a multicast Multimedia Broadcast Multicast Service (MBMS) bearer for receiving the DL multicast traffic. In one embodiment, The UE requests to switch the DL multicast traffic from the multicast MBMS bearer to the unicast EPS bearer upon detecting that the UE is approaching an MBMS coverage boundary. In another embodiment, the UE transmits an indication of preferred target cells to the network before performing a handover and thereby maintaining multicast service continuity of the group communication.

公开(公告)号：US10045351B2

公开(公告)日：2018-08-07

申请号：US14827419

申请日：2015-08-17

Applicant: MEDIATEK INC.

Inventor： Shiang-Jiun Lin ,  Pei-Kai Liao ,  Meng-Ying Tsai ,  Yih-Shen Chen

IPC: H04W72/04 ,  H04L5/14 ,  H04W72/08 ,  H04L5/00

CPC classification number: H04W72/048 ,  H04L5/0053 ,  H04L5/0094 ,  H04L5/1469 ,  H04W72/0406 ,  H04W72/0453 ,  H04W72/082 ,  Y02D70/1262

Abstract: Systems and Methods for supporting carrier aggregation with different TDD configurations are proposed. In a first novel aspect, corresponding apparatus structure is described. In a second novel aspect, aggregation constraint is discussed. In a third novel aspect, transceiving mechanisms over multiple component carriers in DL/UL overlapped subframes are proposed. For simultaneous DL/UL transceiving, band combination indication methods are proposed, and HARQ feedback mechanisms are proposed. For non-simultaneous DL/UL transceiving, transceiving configuration methods are proposed, and the same HARQ feedback mechanisms are proposed. In a fourth novel aspect, CQI/RLM/RRM measurement mechanisms are proposed. In a fifth novel aspect, UE capability signaling mechanisms are proposed. The objective is to support flexible aggregation, to enhance DL data throughout, and to improve UL transmit power efficiency.

公开(公告)号：US20180132242A1

公开(公告)日：2018-05-10

申请号：US15794882

申请日：2017-10-26

Applicant: MEDIATEK INC.

Inventor： Chien-Chang Li ,  Weidong Yang ,  Bo-Si Chen ,  Yih-Shen Chen

IPC: H04W72/04 ,  H04W76/02 ,  H04W24/10 ,  H04L5/00 ,  H04L1/18

CPC classification number: H04W72/0453 ,  H04L1/1812 ,  H04L1/1861 ,  H04L5/001 ,  H04L5/0042 ,  H04L5/0055 ,  H04L5/0091 ,  H04L5/14 ,  H04W24/10 ,  H04W72/0413 ,  H04W76/10

Abstract: Aspects of the disclosure provide a method for grouping serving cells with shortened transmission time intervals in carrier aggregation. The method can include establishing a connection between user equipment and a base station on a primary cell in a wireless communication system, and transmitting a carrier aggregation configuration for configuring secondary cells for the user equipment from the base station to the user equipment, wherein serving cells with different downlink transmission time interval lengths are organized into different cell groups in the carrier aggregation configuration.

公开(公告)号：US20180069685A1

公开(公告)日：2018-03-08

申请号：US15698594

申请日：2017-09-07

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Yu-Chuan Lin ,  Chien-Hwa Hwang ,  Bo-Si Chen ,  Pei-Kai Liao ,  Yih-Shen Chen

IPC: H04L5/14 ,  H04W72/04 ,  H04W52/34

CPC classification number: H04L5/14 ,  H04L5/1469 ,  H04W52/146 ,  H04W52/242 ,  H04W52/34 ,  H04W52/346 ,  H04W52/38 ,  H04W52/383 ,  H04W52/40 ,  H04W52/46 ,  H04W72/0406 ,  H04W72/0446

Abstract: Concepts and examples pertaining to dynamic time division duplex (TDD) in wireless communication systems are described. A first node of a wireless network of a plurality of nodes exchanges coordination information, which is related to transmissions of the nodes of the wireless network using TDD, with at least a second node of the wireless network. The first node performs wireless communications with at least the second node based on the exchanged coordination information.

公开(公告)号：US20170303148A1

公开(公告)日：2017-10-19

申请号：US15638366

申请日：2017-06-30

Applicant: MEDIATEK INC.

Inventor： Per Johan Mikael Johansson ,  Shiang-Jiun Lin ,  Yih-Shen Chen ,  William Plumb

IPC: H04W24/04 ,  H04W76/02 ,  H04W24/10 ,  H04W36/00

CPC classification number: H04W24/04 ,  H04W24/10 ,  H04W36/0083 ,  H04W76/18

Abstract: A method of reporting UE measurement state information in RLF report is provided. A UE performs radio measurements of a serving cell and neighbor cells in a mobile communication network. The UE evaluates a measurement reporting criteria and attempts to access the network to deliver a measurement report if the criteria is met. The UE then detects a radio link failure or a handover failure event and reconnects to the network by performing RRC reestablishment or RRC establishment. Finally, the UE transmits a failure event report to the network. The failure event report comprises UE measurement state information corresponds to the failure event. The UE measurement state information helps the network to determine whether to apply corrective actions to mitigate the failure.

公开(公告)号：US20170290004A1

公开(公告)日：2017-10-05

申请号：US15473628

申请日：2017-03-30

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Yih-Shen Chen ,  Chien-Chang Li ,  Bo-Si Chen

IPC: H04W72/04 ,  H04W72/08

CPC classification number: H04W72/0406 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0087 ,  H04L5/0092 ,  H04W52/146 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/085 ,  H04W72/10 ,  H04W84/042

Abstract: Methods and apparatus are provided for transmission preemption and its indication. In one novel aspect, the UE receives a downlink resource assignment and determines whether an ultra-low latency (ULL) alert signal exists, wherein the ULL alert signal indicates a set of soft bits are overridden. The UE discards the set of soft bits from the overridden resources upon determining the ULL alert signal exists. In one embodiment, the ULL alert signal resides in the assignment subframe, and the overridden soft bits are in the assignment subframe. The alert timing for the ULL alert signal is preconfigured. In another embodiment, the ULL alert signal resides in a subframe that is right after the assignment subframe. The alert signal is enabled through an enabling of an enhanced mobile broadband and ULL service. The alter signal indicates a superset of the overridden soft bits or part of the overridden soft bits.

公开(公告)号：US20170289985A1

公开(公告)日：2017-10-05

申请号：US15473619

申请日：2017-03-30

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Yih-Shen Chen ,  Chien-Chang Li ,  Bo-Si Chen

IPC: H04W72/04 ,  H04W72/10 ,  H04W52/14

CPC classification number: H04W72/0406 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/0087 ,  H04L5/0092 ,  H04W52/146 ,  H04W72/042 ,  H04W72/0446 ,  H04W72/085 ,  H04W72/10 ,  H04W84/042

Abstract: Apparatus and methods are provided for low latency an ultra-low latency (ULL) communications. In novel aspect, short TTIs are configured for low latency communications. The UE configures one or more downlink short transmission time interval (sTTI) regions over a normal TTI region, decodes one or more low latency control channels, which indicates one or more sTTI regions for one or more UEs, and obtains one or more sTTI regions for the UE based on the decoded low latency control channels. In one embodiment, the location short TTI control channels is determined by detecting a short TTI control message at a beginning of a TTI and obtaining a duration of the short TTI in the detected short TTI control message. In one embodiment, the UE obtains one or more uplink resources, power control and CSI configurations based on corresponding downlink short TTI transmissions according to a mapping rule.