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：US20170134150A1

公开(公告)日：2017-05-11

申请号：US15341879

申请日：2016-11-02

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Lung-Sheng Tsai ,  Yi-Ju Liao ,  Tsang-We Yu ,  Pei-Kai Liao

IPC: H04L5/14 ,  H04L1/00 ,  H04L5/00 ,  H04W72/04 ,  H04B7/04

CPC classification number: H04L5/14 ,  H04B7/0452 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0041 ,  H04L1/0045 ,  H04L5/0055 ,  H04L5/0057 ,  H04W72/042 ,  H04W72/1231

Abstract: A new air interface that is interference cancellation friendly is proposed. In one novel aspect, addition information is provided between eNB and UE for interference cancellation. From eNB perspective, it provides assistance information to UEs for CWIC. The assistance information may include modulation order and code rate information of the PDSCH for data transmission that may cause interference to other UEs. From UE perspective, it provides feedback information to the eNB for MCS level assignment. The feedback information may include additional channel quality and interference condition information of a data transmission of a desired transport block with respect to the decoding of the desired transport block.

公开(公告)号：US09622288B2

公开(公告)日：2017-04-11

申请号：US15000244

申请日：2016-01-19

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Yih-Shen Chen

IPC: H04W76/04 ,  H04W72/04 ,  H04L1/18 ,  H04W36/08 ,  H04L5/00 ,  H04W72/12 ,  H04W16/32 ,  H04W24/04 ,  H04W88/02 ,  H04W88/08

CPC classification number: H04W76/27 ,  H04L1/1812 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0094 ,  H04W16/32 ,  H04W24/04 ,  H04W36/08 ,  H04W72/0406 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0426 ,  H04W72/1289 ,  H04W74/0833 ,  H04W88/02 ,  H04W88/08

Abstract: Methods of multi-point carrier aggregation configuration and data forwarding are disclosed. In one embodiment of the invention, a primary connection is established between a UE and a primary base station in a primary cell with a first UE-ID. A second connection is configured between the UE and a second base station in a secondary cell with a second UE-ID. Component carriers from the primary and the second connections are configured and aggregated. Mobility management functions are performed on the primary connection. In another embodiment of the current invention, a first UE data is received from a primary connection with a UE connecting to a first base station, a second UE data is received from a second base station. The first UE data and the second UE data are combined. A third UE data from a network entity is distributed to the first and the second base station.

公开(公告)号：US20170048841A1

公开(公告)日：2017-02-16

申请号：US15235745

申请日：2016-08-12

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Yi-Ju Liao ,  Tsang-Wei Yu ,  Lung-Sheng Tsai ,  Pei-Kai Liao

IPC: H04W72/04 ,  H04B7/04 ,  H04L5/00

CPC classification number: H04B7/0452 ,  H04L5/0044 ,  H04L5/0048 ,  H04L27/3488

Abstract: A method of modulating and demodulating superposed signals for MUST scheme is proposed. A transmitter takes bit sequences intended for multiple receivers under MUST scheme to go through a “bit sequence to constellation points” mapper before entering the modulators to satisfy the Gray coding rule and to achieve high demodulation performance for the receivers. In a first method, each bit sequence is assigned for each constellation point on the constellation map to satisfy one or more conditions under different power split factors. In a second method, the constellation map is divided into sub-regions according to the clustering of the constellation points for bit sequence assignment. A near-UE may use an ML receiver for demodulation and decoding the superposed signal. A far-UE may use an ML receiver or an MMSE receiver for demodulation and decoding the superposed signal.

Abstract translation: 提出了一种用于MUST方案调制和解调叠加信号的方法。 发射机采用MUST方案下的多个接收机的比特序列，在进入调制器之前通过“位序列到星座点”映射器，以满足格雷编码规则，并为接收机实现高解调性能。 在第一种方法中，为星座图上的每个星座点分配每个比特序列以满足不同功率分割因子下的一个或多个条件。 在第二种方法中，星座图根据用于比特序列分配的星座点的聚类被划分成子区域。 近UE可以使用ML接收机来对叠加信号进行解调和解码。 远端UE可以使用ML接收机或MMSE接收机对叠加信号进行解调和解码。

公开(公告)号：US20170041906A1

公开(公告)日：2017-02-09

申请号：US15227204

申请日：2016-08-03

Applicant: MEDIATEK INC.

Inventor： Lung-Sheng Tsai ,  Pei-Kai Liao ,  Yi-Ju Liao ,  Chien-Hwa Hwang

IPC: H04W72/04 ,  H04L5/00 ,  H04L1/00

CPC classification number: H04L5/0062 ,  H04L1/0009 ,  H04L5/0037 ,  H04W52/262 ,  H04W52/34 ,  H04W52/346 ,  H04W72/1289

Abstract: Methods of enabling multiuser superposition transmission (MUST) in LTE systems are proposed. MUST operation allows simultaneous transmission for multiple co-channel users on the same time-frequency resources. A higher-layer signaling is used for configuring a UE to enable MUST in each transmission mode (TM). MUST is a sub-TM of each TM. When a UE is configured by higher layer to enable MUST, the UE will monitor new DCI formats supported by the configured TM with new fields carrying scheduling information of another co-channel UE. Dynamic switching between MUST and non-MUST operation is allowed. Mixed transmission schemes and precoders among co-channel UEs are also supported.

Abstract translation: 提出了在LTE系统中实现多用户叠加传输（MUST）的方法。 MUST操作允许在同一时间频率资源上同时传输多个同频道用户。 更高层的信令用于配置UE以在每个传输模式（TM）中启用MUST。 必须是每个TM的子TM。 当UE由更高级配置以启用MUST时，UE将监视由配置的TM支持的新的DCI格式，新的字段携带另一个同频道UE的调度信息。 允许在MUST和非MUST操作之间进行动态切换。 同时支持混合传输方案和预编码器。

公开(公告)号：US20160278125A1

公开(公告)日：2016-09-22

申请号：US15070191

申请日：2016-03-15

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Weidong Yang ,  Chien-Chang Li ,  Bo-Si Chen

IPC: H04W74/08 ,  H04W16/14

CPC classification number: H04W16/14 ,  H04W24/00 ,  H04W24/10 ,  H04W48/00 ,  H04W72/02 ,  H04W72/04 ,  H04W74/0808

Abstract: Periodic Radio Resource Management (RRM) reporting from user equipments (UEs) is beneficial for a network to efficiently select a carrier with a cleaner channel to serve the UEs. To enable periodic RRM reporting from UEs, periodic beacon signal transmission for UE measurements is necessary. However, in a shared spectrum, precise periodic transmission cannot be guaranteed due to channel contention. A method of transmission with periodic time windows for beacon signal transmission is proposed to resolve potential issues. Under the proposed solution, beacon signal can be transmitted in a certain periodic fashion without frequent physical layer signaling. Furthermore, periodic beacon signal transmission for measurements can be kept with low transmission failure rate due to channel contention.

Abstract translation: 来自用户设备（UE）的定期无线电资源管理（RRM）报告有利于网络有效地选择具有更干净信道的载波来服务于UE。 为了实现来自UE的周期性RRM报告，需要用于UE测量的周期性信标信号传输。 然而，在共享频谱中，由于信道争用，无法保证精确的周期性传输。 提出了一种用于信标信号传输的具有周期性时间窗的传输方法来解​​决潜在的问题。 在提出的解决方案下，信标信号可以以一定的周期性方式发送，而不需要频繁的物理层信令。 此外，由于信道争用，用于测量的周期性信标信号传输可以保持低传输故障率。

公开(公告)号：US20160227545A1

公开(公告)日：2016-08-04

申请号：US15010000

申请日：2016-01-29

Applicant: MEDIATEK INC.

Inventor： Weidong Yang ,  Pei-Kai Liao ,  Chien-Chang Li ,  Bo-Si Chen

IPC: H04W72/04 ,  H04W16/14

CPC classification number: H04W16/14 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0092 ,  H04L5/14 ,  H04W72/0406

Abstract: Methods and apparatus are provided for improved Licensed Assisted Access (LAA) networks. A LAA subframe is received via an unlicensed frequency band. Control information is communicated via predetermined symbol locations within the LAA subframe. An indication of a first and a second symbol locations is received. A LAA subframe is then received. It is determined if control information is present at the first or second symbol locations within the received LAA subframe. Demodulation parameters based on the control information are determined. The LAA subframe is demodulated using the demodulation parameters. An indication of a transmission duration is communicated to a UE. The transmission duration is determined based on the LAA subframe. A type of subframe is determined based on transmission duration. Automatic Gain Control (AGC) protection is provided in a LAA subframe. The AGC protection LLA subframe does not communicate control information in a symbol adjacent to a reservation signal.

Abstract translation: 提供了用于改进的许可辅助接入（LAA）网络的方法和装置。 经由非许可频带接收LAA子帧。 通过LAA子帧内的预定符号位置传送控制信息。 接收到第一和第二符号位置的指示。 然后接收LAA子帧。 确定控制信息是否存在于接收的LAA子帧内的第一或第二符号位置处。 确定基于控制信息的解调参数。 LAA子帧使用解调参数进行解调。 向UE发送传输持续时间的指示。 基于LAA子帧确定传输持续时间。 基于传输持续时间来确定一种类型的子帧。 LAA子帧中提供自动增益控制（AGC）保护。 AGC保护LLA子帧不在与预留信号相邻的符号中传送控制信息。

公开(公告)号：US20160219624A1

公开(公告)日：2016-07-28

申请号：US15004196

申请日：2016-01-22

Applicant: MEDIATEK INC.

Inventor： Shiang-Jiun Lin ,  Pei-Kai Liao ,  Chien-Hwa Hwang

IPC: H04W74/08 ,  H04W72/12 ,  H04W72/14 ,  H04W74/00

CPC classification number: H04W74/085

Abstract: Methods and apparatus are provided for Msg3 collision resolutions. In one embodiment, the UE obtains a set of DMRS seeds and randomly selecting one to generate a DMRS sequence for the Msg3. The set of DMRS seeds is either generated based on a received cell-specific parameter or are received from the network. In another embodiment, the eNB, upon detecting the collision in Msg3, indicates a lowered MCS level for the Msg3 transmission in the RAR after the preamble detection. In another embodiment, the early termination of Msg3 transmission is used upon determining the collision of Msg3. In one embodiment, the eNB responds an ACK to a failed Msg3 to suspend the re-transmission of the Msg3. In another embodiment, the eNB sends a flag to cancel the mac-ContentionResolutionTimer and terminate the Msg3 transmission. The termination indication is either embedded in the acknowledgement signaling or sent through PDCCH signaling.

Abstract translation: 为Msg3冲突解决方案提供了方法和设备。 在一个实施例中，UE获得一组DMRS种子并随机选择一个以产生Msg3的DMRS序列。 DMRS种子组是根据接收的小区特定参数生成的，或者是从网络接收的。 在另一个实施例中，eNB在检测到Msg3中的冲突后，指示在前导码检测之后的RAR中的Msg3传输的降低的MCS级别。 在另一实施例中，在确定Msg3的冲突时使用Msg3传输的提前终止。 在一个实施例中，eNB对发生故障的Msg3进行ACK响应以暂停Msg3的重传。 在另一个实施例中，eNB发送标志以取消mac-ContentionResolutionTimer并终止Msg3传输。 终止指示被嵌入在确认信令中或通过PDCCH信令发送。

公开(公告)号：US20150358978A1

公开(公告)日：2015-12-10

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: H04W72/08 ,  H04W72/04 ,  H04L5/14

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.

Abstract translation: 提出了用于支持具有不同TDD配置的载波聚合的系统和方法。 在第一新颖方面，描述了相应的装置结构。 在第二个新颖的方面，讨论了聚合约束。 在第三个新颖的方面，提出了在DL / UL重叠子帧中的多分量载波上的收发机制。 为了同时进行DL / UL收发，提出了频带组合指示方法，提出了HARQ反馈机制。 对于非同步DL / UL收发，提出了收发配置方法，提出了相同的HARQ反馈机制。 在第四个新颖的​​方面，提出了CQI / RLM / RRM测量机制。 在第五个新颖的方面，提出了UE能力信令机制。 目的是支持灵活的聚合，提高DL数据的整体性能，并提高UL的传输功率效率。