公开(公告)号：US09661682B2

公开(公告)日：2017-05-23

申请号：US15000264

申请日：2016-01-19

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Yih-Shen Chen

IPC: H04W36/08 ,  H04W76/04 ,  H04W72/04 ,  H04L1/18 ,  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：US20170135114A1

公开(公告)日：2017-05-11

申请号：US15341846

申请日：2016-11-02

Applicant: MEDIATEK INC.

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

IPC: H04W72/08 ,  H04L25/02 ,  H04B7/04

CPC classification number: H04W72/082 ,  H04B7/0452 ,  H04J11/00 ,  H04L1/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/0041 ,  H04L1/0048 ,  H04L1/0066 ,  H04L25/0202 ,  H04L2001/0093 ,  H04W88/08 ,  H04W92/10

Abstract: A new air interface that is interference cancellation friendly is proposed. In one novel aspect, a novel code rate assignment with rate splitting is proposed. In one embodiment, a base station decomposes a codeword {x1} into two codewords {x1a} and {x1b}. The two codewords are applied with different code rates and/or modulation orders. More specifically, the code rate or modulation order of codeword {x1a} is set appropriately so that a victim UE can decode and cancel {1a} under the channel quality of the victim UE. Typically, the channel quality of a victim UE is poorer than the channel quality of the intended UE. As a result, the MCS for {1a} can be lower than the MCS for {1b} such that the victim UE is able to apply CWIC to decode and cancel {1a}.

公开(公告)号：US20170094668A1

公开(公告)日：2017-03-30

申请号：US15277709

申请日：2016-09-27

Applicant: MEDIATEK INC.

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

IPC: H04W72/04 ,  H04B7/06

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. When a UE is configured by higher layer to enable MUST, the UE will monitor physical-layer control signaling carrying scheduling information and MUST-related information. Depending on whether MUST exists in each subframe, the UE derives the power allocation between the UE and its co-channel UE on allocated resource blocks. The UE also derives the power allocation based on whether it is configured for CRS-based transmission mode or DMRS-based transmission mode.

公开(公告)号：US20160337879A1

公开(公告)日：2016-11-17

申请号：US15150001

申请日：2016-05-09

Applicant: MEDIATEK INC.

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

IPC: H04W24/02 ,  H04B7/04 ,  H04W72/08 ,  H04B17/336 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04B7/0452 ,  H04B7/063 ,  H04B7/0632 ,  H04B17/336 ,  H04J11/004 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/0028 ,  H04L5/0037 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0069 ,  H04L27/0008 ,  H04L27/183 ,  H04L27/3488 ,  H04W72/1231

Abstract: A method of performing downlink multiuser superposition transmission (MUST) with enhanced channel state information (CSI) feedback is proposed. When a user equipment (UE) reports CQI/SINR feedback for RI=RANK-2, the UE also reports a single beam CQI/SINR feedback for RI=RANK1. As a result, the scheduling base station can calculate the actual SINRs based on different MUST scenarios and thereby determining appropriate modulation and coding scheme (MCS) for the UE. Furthermore, if the granularity of the CQI table cannot reflect the high values of the single beam SINR, then a predefined scaling factor (0

Abstract translation: 提出了一种利用增强信道状态信息（CSI）反馈执行下行链路多用户叠加传输（MUST）的方法。 当用户设备（UE）报告RI = RANK-2的CQI / SINR反馈时，UE还报告用于RI = RANK1的单个波束CQI / SINR反馈。 结果，调度基站可以基于不同的MUST场景计算实际SINR，从而为UE确定适当的调制和编码方案（MCS）。 此外，如果CQI表的粒度不能反映单光束SINR的高值，则可以应用基站和UE都已知的预定义缩放因子（0 <β<1）。

公开(公告)号：US20160309512A1

公开(公告)日：2016-10-20

申请号：US15098431

申请日：2016-04-14

Applicant: MEDIATEK INC.

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

IPC: H04W74/08

CPC classification number: H04W74/0816 ,  H04W74/085

Abstract: A method of determining and adapting a contention window size (CWS) based on channel loading for load-based equipment (LBE) listen before talk (LBT) channel access mechanism is proposed. The historic observations obtained from carrier sensing can reflect the state of channel loading, which is then used to adapt the maximal contention window size. A wireless device collects historical channel loading information including the number of idle slots and the number of busy slots. The wireless device uses the historical information to estimate the total number of active devices M in the wireless network and the channel-loading factor. The wireless device then computes the thresholds using the long-term value of M and then adapts the value of the CWS based on the channel-loading factor and the thresholds.

Abstract translation: 提出了一种基于用于基于负载的设备（LBE）听话（LBT）信道访问机制的信道加载来确定和适应竞争窗口大小（CWS）的方法。 从载波侦听获得的历史观察可以反映信道加载的状态，然后将其用于适应最大争用窗口大小。 无线设备收集历史信道加载信息，包括空闲时隙的数量和忙时隙的数量。 无线设备使用历史信息来估计无线网络中的有效设备M的总数和信道负载因子。 然后，无线设备使用M的长期值来计算阈值，然后基于信道负载因子和阈值来适配CWS的值。

公开(公告)号：US20160309511A1

公开(公告)日：2016-10-20

申请号：US15098409

申请日：2016-04-14

Applicant: MEDIATEK INC.

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

IPC: H04W74/08 ,  H04W74/00

CPC classification number: H04W74/0816 ,  H04W74/006 ,  H04W74/0808

Abstract: A method of determining and configuring a maximal clear channel assessment (CCA) duration based on channel loading information for frame-based equipment (FBE) listen before talk (LBT) channel access mechanism is proposed. The CCA period is a random CCA duration generated out of the maximal CCA duration, which is configurable and is carried in the radio resource control (RRC) signaling or the beacon signal of LAA. To solve the collision problem in synchronous network and the unfairness problem in asynchronous network, the maximal duration of CCA should be adaptive based on the experienced channel occupancy status and/or the experienced synchronization difference within the network. First, the maximal duration of CCA should be adjusted according to the channel loading. Second, the maximal duration of CCA should be larger than the timing difference between eNBs or between UEs.

Abstract translation: 提出了一种基于用于基于帧的设备（FBE）监听（LBT）信道访问机制的信道加载信息来确定和配置最大清除信道评估（CCA）持续时间的方法。 CCA周期是从最大CCA持续时间产生的随机CCA持续时间，其可配置并且在无线电资源控制（RRC）信令或LAA的信标信号中携带。 为了解决异步网络中的碰撞问题和异步网络中的不公平问题，基于有经验的信道占用状态和/或网络内有经验的同步差异，CCA的最大持续时间应该是自适应的。 首先，CCA的最大持续时间应根据通道负载进行调整。 第二，CCA的最大持续时间应该大于eNB之间或UE之间的定时差。

公开(公告)号：US09277548B2

公开(公告)日：2016-03-01

申请号：US13927113

申请日：2013-06-26

Applicant: MEDIATEK, INC.

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

IPC: H04W72/02 ,  H04W72/04 ,  H04L1/00 ,  H04L5/00 ,  H04W48/16

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。

公开(公告)号：US20150147994A1

公开(公告)日：2015-05-28

申请号：US14555226

申请日：2014-11-26

Applicant: MEDIATEK INC.

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

IPC: H04B1/10 ,  H04B7/04

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, the interfering signals comprise intra-cell interfering signals and/or inter-cell interfering signals. While inter-cell interference comes from neighboring cells, intra-cell interference comes from MU-MIMO transmission to other users in the same serving cell as the victim UE. In one example, the serving base station not only signals information to the victim UE for inter-cell interference, but also for intra-cell interference due to MU-MIMO transmission.

Abstract translation: 提供了一种用于接收机消除或抑制与网络协助的同频干扰的方法。 该方法包括导出与移动通信网络中的干扰信号有关的第一组参数; 接收与来自网络的干扰信号有关的第二组参数; 并且基于第一组和第二组参数的组合来消除来自接收信号的干扰信号的贡献。 在一个实施例中，干扰信号包括小区内干扰信号和/或小区间干扰信号。 虽然小区间干扰来自相邻小区，小区内干扰来自与受害UE相同的服务小区中的MU-MIMO传输到其他用户。 在一个示例中，服务基站不仅向受害者UE发送用于小区间干扰的信息，而且还用于由于MU-MIMO传输而导致的小区内干扰。

公开(公告)号：US20140321385A1

公开(公告)日：2014-10-30

申请号：US14324236

申请日：2014-07-07

Applicant: MEDIATEK INC.

Inventor： Chih-Yuan Lin ,  Pei-Kai Liao

IPC: H04J11/00

CPC classification number: H04J11/005 ,  H04L5/0007 ,  H04L5/005 ,  H04L27/261 ,  H04L2025/03796

Abstract: In wireless OFDMA systems, midamble is used to facilitate downlink (DL) channel estimation. Midamble signals are transmitted by a base station via a midamble channel allocated in a DL subframe. In a novel symbol-based midamble channel allocation scheme, a midamble channel is allocated in the first or the last OFDM symbol of multiple resource blocks of the subframe, while the remaining consecutive OFDM symbols are used for data transmission. The symbol-based midamble channel provides good coexistence between midamble signals and pilot signals without inducing additional limitation or complexity. Under a novel midamble channel and sequence arrangement, both code sequence and either time-domain or frequency-domain location degrees-of-freedom are considered such that the required number of midamble sequences is substantially smaller than the number of strong interferences. In addition, different midamble sequences are systematically generated based on a base sequence such that the receiving mobile station does not need to memorize all the different code sequences.

Abstract translation: 在无线OFDMA系统中，使用midamble来促进下行链路（DL）信道估计。 Midamble信号由基站经由在DL子帧中分配的中置码信道发送。 在一种新颖的基于符号的中间码信道分配方案中，在子帧的多个资源块的第一个或最后一个OFDM符号中分配一个中继码信道，而其余的连续的OFDM符号用于数据传输。 基于符号的中置码信道在中置信号和导频信号之间提供良好的共存，而不会引起额外的限制或复杂性。 在新颖的中间码信道和序列排列下，考虑码序列和时域或频域位置自由度，使得所需数量的中继码序列显着小于强干扰数。 此外，基于基本序列系统地生成不同的中间码序列，使得接收移动台不需要记住所有不同的代码序列。

公开(公告)号：US20240251250A1

公开(公告)日：2024-07-25

申请号：US18604313

申请日：2024-03-13

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao

IPC: H04W16/14 ,  H04L5/00 ,  H04W72/0453 ,  H04W72/23 ,  H04W74/0833

CPC classification number: H04W16/14 ,  H04L5/001 ,  H04W72/0453 ,  H04W72/23 ,  H04W74/0833

Abstract: A method of efficient wideband operation for intra-band non-contiguous spectrum using extending bandwidth part (BWP) configuration is proposed. The BWP definition is extended to cluster BWPs to aggregate distributed spectrum blocks within a frequency range (e.g., 200 MHz) by single carrier operation and facilitate UE to filter out the transmission of unknown RAT between any two of the distributed spectrum blocks. In addition, the cluster BWP configuration enables dynamic aggregation of the number and location of the distributed spectrum blocks based on LBT results in unlicensed spectrum. Specifically, the BWP definition is extended to a group of one or multiple radio resource clusters, each of which contains a set of contiguous PRBs in frequency domain within the associated carrier.