公开(公告)号：US09813124B2

公开(公告)日：2017-11-07

申请号：US14555271

申请日：2014-11-26

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Xiangyang Zhuang ,  Pei-Kai Liao

IPC: H04B7/0452 ,  H04B1/10 ,  H04B7/06 ,  H04L1/00 ,  H04L5/00 ,  H04J11/00 ,  H04W72/04 ,  H04W28/06 ,  H04W28/18

CPC classification number: H04B7/0452 ,  H04B1/1027 ,  H04B7/0617 ,  H04B7/0619 ,  H04J11/004 ,  H04J11/005 ,  H04L1/00 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0073 ,  H04W28/06 ,  H04W28/18 ,  H04W72/042

Abstract: A method for a receiver to cancel or suppress co-channel interference with network assistance is provided. The method comprises deriving a first set of parameters related to interfering signals in a mobile communication network; receiving a second set of parameters related to the interfering signals from the network; and cancelling the contribution of interfering signals from the received signal based on the combination of the first set and second set of parameters. In one embodiment, scrambling rules and resource block allocation information are signaled to the victim UE to facilitate Codeword-Level Interference Cancellation (CWIC). While the scrambling rule for control channel is based on UE-specific identity, the scrambling rule for data channel is based on cell-specific identity or other network-configurable identity to facilitate CWIC. In addition, RA-allocation information are signaled to the victim UE in an efficient way.

公开(公告)号：US09681436B2

公开(公告)日：2017-06-13

申请号：US15233099

申请日：2016-08-10

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Xiangyang Zhuang

IPC: H04W72/04 ,  H04W48/12 ,  H04L5/00

CPC classification number: H04W72/042 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0092 ,  H04W48/12

Abstract: A method to allocate physical radio resources for both distributed and localized transmission schemes of ePDCCH and configure common and UE-specific search space for UE is provided. In one embodiment, a UE receives a first high-layer information to determine a first set of PRBs. The UE determines a first set of candidate ePDCCHs within the first set of PRBs, wherein one or more candidate ePDCCHs potentially carries DCI intended for the UE. The UE then decodes the first set of candidate ePDCCHs to obtain the DCI intended for the UE. Similar steps are performed for a second set of candidate ePDCCHs potentially carrying DCI intended for the UE. The allocated radio resources of the candidate ePDCCHs may be distributed or localized and constitute either common or UE-specific search space. Blind decoding complexity is reduced.

公开(公告)号：US20170156080A1

公开(公告)日：2017-06-01

申请号：US15431445

申请日：2017-02-13

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Xiangyang Zhuang

IPC: H04W28/04 ,  H04B15/00 ,  H04W24/02

CPC classification number: H04W28/04 ,  H04B1/123 ,  H04B15/00 ,  H04J11/004 ,  H04J11/005 ,  H04J11/0053 ,  H04L1/00 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0073 ,  H04L5/0091 ,  H04L25/0202 ,  H04L25/0224 ,  H04L25/0328 ,  H04W24/02 ,  H04W72/0426 ,  H04W88/08

Abstract: A method of interference cancellation is proposed. A UE obtains configuration information of a data transmission from a neighboring cell via an interference channel in a mobile communication network. The UE receives radio signals on a set of data resource elements as determined based on the obtained configuration information. The UE then estimates the interference channel corresponding to the data transmission from the neighboring cell based on the received radio signals on the set of data resource elements. Finally, the UE cancels the data transmission from the neighboring cell based on the estimated interference channel.

公开(公告)号：US09628251B2

公开(公告)日：2017-04-18

申请号：US14089334

申请日：2013-11-25

Applicant: MEDIATEK, INC.

Inventor： Shiang-Jiun Lin ,  Chien-Hwa Hwang ,  Xiangyang Zhuang

IPC: H04W24/08 ,  H04L5/14 ,  H04W72/04 ,  H04W72/12 ,  H04L12/923 ,  H04L5/00

CPC classification number: H04L5/14 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0094 ,  H04L5/1469 ,  H04L47/762 ,  H04W72/04 ,  H04W72/044 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/1205 ,  H04W72/1252

Abstract: Methods for UE measurement enhancement in an adaptive TDD configuration network are proposed. In a first solution, the network provides an adaptive TDD indicator to the UE. In a second solution, the network provides an instantaneous TDD configuration to the UE. In a third solution, multiple TDD configurations are grouped as one TDD group, and the network adapts TDD configurations within the same TDD group. In a fourth solution, the network broadcasts a TDD reference configuration in SIB1, and adapts to another TDD configuration with DL super set constraint, i.e., the DL subframes of the other TDD configuration form a super set of the DL subframes of the broadcasted TDD reference configuration.

公开(公告)号：US20160044708A1

公开(公告)日：2016-02-11

申请号：US14870207

申请日：2015-09-30

Applicant: MEDIATEK INC.

Inventor： Shiang-Jiun Lin ,  Min Wu ,  Chien-Hwa Hwang ,  Xiangyang Zhuang

IPC: H04W72/12 ,  H04L5/14 ,  H04L1/18 ,  H04W76/04

CPC classification number: H04L1/1861 ,  H04L5/1469 ,  H04W72/1289 ,  H04W76/28

Abstract: A method of DRX operation enhancement in adaptive TDD systems is proposed. A UE configures and enters DRX operation in an LTE/LTE-A mobile communication network. The UE obtains adaptive TDD configuration information from a base station. The adaptive TDD configuration information comprises an actual TDD configuration and a reference TDD configuration. The UE performs DRX timer counting and HARQ timer counting based on the reference TDD configuration. The UE also synchronizes DRX status with the base station. With the reference TDD configuration, it can avoid the potential misunderstanding between eNB and UE regarding DRX and HARQ RTT timing when TDD configuration changes.

Abstract translation: 提出了一种自适应TDD系统中DRX操作增强的方法。 UE在LTE / LTE-A移动通信网络中配置并进入DRX操作。 UE从基站获取自适应TDD配置信息。 自适应TDD配置信息包括实际的TDD配置和参考TDD配置。 UE基于参考TDD配置执行DRX定时器计数和HARQ定时器计数。 UE还将DRX状态与基站同步。 利用参考TDD配置，当TDD配置改变时，可以避免eNB和UE之间关于DRX和HARQ RTT定时的潜在误解。

公开(公告)号：US20160043834A1

公开(公告)日：2016-02-11

申请号：US14870244

申请日：2015-09-30

Applicant: MEDIATEK INC.

Inventor： Shiang-Jiun Lin ,  Min Wu ,  Chien-Hwa Hwang ,  Xiangyang Zhuang

IPC: H04L1/18 ,  H04W72/12 ,  H04L5/14

CPC classification number: H04L1/1861 ,  H04L1/1812 ,  H04L1/1822 ,  H04L1/1848 ,  H04L1/1854 ,  H04L5/1469 ,  H04W72/1289 ,  H04W76/28

Abstract: A method of DRX and HARQ operation enhancement in adaptive TDD systems is proposed. A UE establishes a radio resource control (RRC) connection with a base station in a mobile communication network. The UE obtains adaptive time division duplex (TDD) configuration information from the base station, wherein the adaptive TDD configuration information comprises an actual TDD configuration and/or a reference TDD configuration. The UE performs a Hybrid Automatic Repeat Request (HARQ) round trip time (RTT) timer counting for each downlink (DL) HARQ process based on the adaptive TDD configuration information. The UE can avoid the potential misunderstanding between eNB and UE regarding HARQ RTT timing when TDD configuration changes.

Abstract translation: 提出了一种在自适应TDD系统中进行DRX和HARQ操作增强的方法。 UE在移动通信网络中建立与基站的无线电资源控制（RRC）连接。 UE从基站获得自适应时分双工（TDD）配置信息，其中自适应TDD配置信息包括实际的TDD配置和/或参考TDD配置。 基于自适应TDD配置信息，UE针对每个下行链路（HARQ）HARQ进程执行混合自动重复请求（HARQ）往返时间（RTT）定时器计数。 当TDD配置改变时，UE可以避免eNB和UE之间关于HARQ RTT定时的潜在误解。

公开(公告)号：US20160029323A1

公开(公告)日：2016-01-28

申请号：US14873205

申请日：2015-10-02

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Shiang-Jiun Lin ,  Min Wu ,  Xiangyang Zhuang

IPC: H04W52/32 ,  H04W52/14 ,  H04W52/48 ,  H04L5/14 ,  H04L1/18

CPC classification number: H04W52/365 ,  H04L1/1861 ,  H04L5/001 ,  H04L5/1469 ,  H04W52/08 ,  H04W52/10 ,  H04W52/146 ,  H04W52/221 ,  H04W52/325 ,  H04W52/34 ,  H04W52/48 ,  H04W52/58 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0473

Abstract: A method of UE transmit power adjustment based on TPC command in adaptive TDD systems is proposed. A UE obtains TDD configuration information from a base station in an adaptive TDD system. The UE also obtains an HARQ reference configuration from the base station. The UE then receives a transmit power control (TPC) command in one or more previous subframes. The UE performs power adjustment in a subsequent subframe based on the TPC command. The location of the previous subframes is determined based on the HARQ reference configuration. In one embodiment, an UL HARQ reference configuration is applied for PUSCH power control. In another embodiment, a DL HARQ reference configuration is applied for PUCCH power control.

Abstract translation: 提出了一种在自适应TDD系统中基于TPC命令的UE发射功率调整的方法。 UE在自适应TDD系统中从基站获取TDD配置信息。 UE还从基站获取HARQ参考配置。 然后，UE在一个或多个先前子帧中接收发射功率控制（TPC）命令。 UE根据TPC命令在随后的子帧中执行功率调整。 基于HARQ参考配置来确定先前子帧的位置。 在一个实施例中，UL HARQ参考配置被应用于PUSCH功率控制。 在另一个实施例中，DL HARQ参考配置被应用于PUCCH功率控制。

公开(公告)号：US20150003405A1

公开(公告)日：2015-01-01

申请号：US14315072

申请日：2014-06-25

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Xiangyang Zhuang

IPC: H04L5/00

CPC classification number: H04L5/0053

Abstract: New enhanced physical broadcast channel (EPBCH) based on UE-specific reference signals (DMRS) for MIB and SIB transmission is proposed. The overall design consideration for EPBCH can be summarized as follows: support different values of frequency reuse factor, support different cell coverage sizes, maximized diversity gain in open-loop operation such as transmit diversity and frequency diversity, minimized overhead, and minimized UE complexity.

Abstract translation: 提出了基于用于MIB和SIB传输的UE专用参考信号（DMRS）的新增强物理广播信道（EPBCH）。 EPBCH的总体设计考虑可以总结如下：支持频率复用因子的不同值，支持不同的小区覆盖大小，开环操作中的最大化分集增益，如发射分集和频率分集，最小化开销和最小化的UE复杂度。

公开(公告)号：US20140204783A1

公开(公告)日：2014-07-24

申请号：US14157212

申请日：2014-01-16

Applicant: MEDIATEK, INC.

Inventor： Shiang-Jiun Lin ,  Chien-Hwa Hwang ,  Xiangyang Zhuang

IPC: H04W24/02 ,  H04L5/14 ,  H04W72/04

CPC classification number: H04W24/02 ,  H04L1/1825 ,  H04L1/1854 ,  H04L5/1438 ,  H04L5/1469 ,  H04W48/12 ,  H04W72/048 ,  H04W72/1289 ,  H04W74/006

Abstract: Solutions to support the coexistence of legacy UEs and new released UEs in adaptive TDD systems are proposed. Methods of TDD grouping, RACH (random access channel) resource allocation, and DL/UL data transmission and HARQ (Hybrid Automatic Repeat Request) process to serve legacy UEs without interfering the operation of new released UEs are proposed. With the methods proposed in this invention, both the legacy UEs and the new released UEs can be served in the adaptive TDD systems and the data transmission from the legacy UEs would not interfere the data reception of the new released UEs.

Abstract translation: 提出了支持传统UE和新发布的UE在自适应TDD系统中共存的解决方案。 提出了TDD分组的方法，RACH（随机接入信道）资源分配和DL / UL数据传输和HARQ（混合自动重传请求）过程，用于服务于传统UE而不干扰新发布的UE的操作。 利用本发明提出的方法，可以在自适应TDD系统中服务传统UE和新发布的UE，并且来自传统UE的数据传输不会干扰新发布的UE的数据接收。

公开(公告)号：US20130286980A1

公开(公告)日：2013-10-31

申请号：US13927113

申请日：2013-06-26

Applicant: Mediatek, Inc.

Inventor： Pei-Kai Liao ,  Hua-Min Chen ,  Xiangyang Zhuang

IPC: H04W72/04

CPC classification number: H04W72/1289 ,  H04L1/0045 ,  H04L1/0061 ,  H04L1/0072 ,  H04L5/0023 ,  H04L5/0025 ,  H04L5/0053 ,  H04W16/32 ,  H04W48/16 ,  H04W72/042 ,  H04W72/0453 ,  H04W72/046 ,  H04W72/0493 ,  H04W88/02 ,  H04W88/08

Abstract: A two-level physical structure is defined for better diversity for both distributed and localized transmission in enhanced physical downlink control channel (ePDCCH). First level is a physical unit of enhanced resource element groups (eREGs), where the group of REs is predefined for each eREG. Second level is a logical unit of enhanced control channel elements (eCCEs), where the group of eREGs is predefined or configurable by higher layer for each eCCE. For distributed transmission of ePDCCH, eCCE consists of several eREGs that are distributed in multiple non-contiguous PRBs spreading over the whole channel frequency. Downlink control information (DCI) is transmitted on a number of aggregated eCCEs according to the modulation and coding level required. The utilization reference signals of antenna ports for ePDCCH demodulation is based on the logical order of eCCEs and the aggregation level for DCI transmission.

Abstract translation: 定义了两级物理结构，用于在增强的物理下行链路控制信道（ePDCCH）中用于分布式和局部传输的更好的分集。 第一级是增强资源元素组（eREG）的物理单位，其中RE组是为每个eREG预定义的。 第二级是增强的控制信道单元（eCCE）的逻辑单元，其中eEGE组由每个eCCE预定义或由更高层配置。 对于ePDCCH的分布式传输，eCCE由分布在整个信道频率上扩展的多个非连续PRB中的若干eREG组成。 下行链路控制信息（DCI）根据所需的调制和编码等级在多个聚合的eCCE上发送。 用于ePDCCH解调的天线端口的利用参考信号基于eCCE的逻辑顺序和DCI传输的聚合级别。