公开(公告)号：US20230209366A1

公开(公告)日：2023-06-29

申请号：US18117387

申请日：2023-03-03

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Chien-Chang Li ,  Yi-Ju Liao ,  Pei-Kai Liao ,  Weidong Yang

IPC: H04W16/28 ,  H04W72/044 ,  H04L5/00 ,  H04W72/23 ,  H04L1/1829 ,  H04W74/08

CPC classification number: H04W16/28 ,  H04W72/046 ,  H04L5/0053 ,  H04W72/23 ,  H04L1/1861 ,  H04W74/08 ,  H04L5/0037 ,  H04B7/0617

Abstract: A new design for physical downlink control channel (PDCCH) is proposed for the next generation 5G new radio systems. A UE receives the configuration of a default control resource set (CORESET) in MIB/SIB from its serving base station. The default CORESET contains both common search space and UE-specific search space for candidate PDCCH transmission. A PDCCH in a default CORESET is mapped to physical resource in a distributed or localized manner. Specifically, various REG-to-CCE mapping rules are proposed to improve frequency diversity gain, or frequency selectivity gain, or to reduce latency of PDCCH processing. Further, to facilitate analog beamforming in mmWave systems, the default CORESET is transmitted in a synchronization signal (SS) block associated with a corresponding analog beam direction.

公开(公告)号：US10886958B2

公开(公告)日：2021-01-05

申请号：US16820925

申请日：2020-03-17

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Chun-Ming Kuo ,  Chien-Hwa Hwang ,  Jiann-Ching Guey

IPC: H04B1/12 ,  H04W72/04

Abstract: A method of providing over-the-air assistance information for interference cancellation or suppression to the receiver is proposed. Under a first solution, a two-stage DCI (downlink control information) or SCI (sidelink control information) scheduling method is proposed. The set of first-stage DCI or SCI provides a part of scheduling information which is beneficial for interference cancellation or suppression and is broadcasted by a transmitter or scheduler to all receivers. The set of second-stage DCI or SCI includes the remaining scheduling information and is unicasted by a transmitter or scheduler to each receiver. Under a second solution, assistance information DCI for interference cancellation or suppression is broadcasted by a transmitter or scheduler to all receivers.

公开(公告)号：US10454652B2

公开(公告)日：2019-10-22

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 ,  H04W52/26 ,  H04W52/34 ,  H04W72/12

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.

公开(公告)号：US20190313455A1

公开(公告)日：2019-10-10

申请号：US16377118

申请日：2019-04-05

Applicant: MediaTek Inc.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Chien-Hwa Hwang ,  Chiou-Wei Tsai ,  Ming-Po Chang

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/12 ,  H04W24/00 ,  H04W48/16

Abstract: Techniques and examples of efficient detection of a transmission session in New Radio unlicensed spectrum (NR-U) are described. An apparatus (e.g., user equipment (UE)) detects presence of an indication from a base station of a wireless network in an NR-U. The apparatus determines that a transmission opportunity (TXOP) follows the indication responsive to the detecting. The apparatus then receives a downlink (DL) transmission in the NR-U from the base station during the TXOP.

公开(公告)号：US20180279273A1

公开(公告)日：2018-09-27

申请号：US15933591

申请日：2018-03-23

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Lung-Sheng Tsai ,  Chien-Hwa Hwang

IPC: H04W72/04

CPC classification number: H04W72/042 ,  H04B7/022 ,  H04B7/0613 ,  H04W72/0446

Abstract: Various solutions for downlink control signal design with respect to user equipment and network apparatus in mobile communications are described. An apparatus may receive a first downlink control signal from a first source. The apparatus may receive a second downlink control signal from a second source. The apparatus may further receive downlink data according to the first downlink control signal and the second downlink control signal. The first downlink control signal and the second downlink control signal may be identical. The first source and the second source may be different.

公开(公告)号：US09985700B2

公开(公告)日：2018-05-29

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: H04B7/0452 ,  H04B17/336 ,  H04W72/12 ,  H04L5/00 ,  H04L27/00

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

公开(公告)号：US09893843B2

公开(公告)日：2018-02-13

申请号：US14980750

申请日：2015-12-28

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Lung-Sheng Tsai ,  Yi-Ju Liao ,  Tze-Ping Low

IPC: H04W4/00 ,  H04L1/18 ,  H04W52/26 ,  H04W52/24 ,  H04W72/12 ,  H04L1/00 ,  H04W28/06 ,  H04W28/22 ,  H04L5/00 ,  H04L5/14

CPC classification number: H04L1/1812 ,  H04L1/0067 ,  H04L1/1822 ,  H04L1/1845 ,  H04L1/1896 ,  H04L5/001 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0069 ,  H04L5/14 ,  H04W28/065 ,  H04W28/22 ,  H04W52/243 ,  H04W52/262 ,  H04W52/267 ,  H04W72/12 ,  H04W72/1252

Abstract: Methods for rate matching with soft buffer size setting at the transmitter and soft channel bits storage at the receiver for superposition coding are proposed. In the superposition coding scheme, a transport block intended to one UE needs to be decoded by another UE's receiver. However, the soft buffer sizes per code block of the two receivers may not be the same since the size depends on the UE category. The base station can signal the soft buffer size used at the transmitter for rate matching to the UEs for superposition decoding. A UE stores information bits associated with an interfering signal in its soft buffers in accordance with the soft buffer size used at the transmitter for rate matching. As a result, the UE can decode and subtract the interfering signal from the desired signal for superposition coding.

公开(公告)号：US09680578B2

公开(公告)日：2017-06-13

申请号：US14980991

申请日：2015-12-28

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Yi-Ju Liao ,  Tze-Ping Low ,  Lung-Sheng Tsai

IPC: H04B15/00 ,  H04L1/18 ,  H04L12/861 ,  H04L5/00

CPC classification number: H04B15/00 ,  H04L1/1812 ,  H04L1/1822 ,  H04L1/1835 ,  H04L1/1845 ,  H04L5/0023 ,  H04L5/0055 ,  H04L49/9057

Abstract: A method is proposed to enable a UE performing codeword level interference cancellation (CW-IC) to know whether an interfering transport block (TB) is a new transmission or retransmission. With this knowledge, the UE knows whether the soft channel bits stored in a soft buffer are to be discarded or combined with the soft channel bits newly obtained.

公开(公告)号：US20170048840A1

公开(公告)日：2017-02-16

申请号：US15235695

申请日：2016-08-12

Applicant: MEDIATEK INC.

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

IPC: H04W72/04 ,  H04L5/00

CPC classification number: H04L27/3488 ,  H04J11/0046 ,  H04L5/0046 ,  H04L27/3483

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实现接收机的高解调性能。 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：US09272851B2

公开(公告)日：2016-03-01

申请号：US13670394

申请日：2012-11-06

Applicant: MEDIATEK, INC.

Inventor： Chien-Hwa Hwang ,  Meng-Ying Tsai ,  Per Johan Mikael Johansson

IPC: B65G51/00 ,  H04W24/10 ,  B05C11/10 ,  H04W24/08 ,  H04W24/02

CPC classification number: B65G51/00 ,  B05C11/1042 ,  B05C11/1047 ,  H04W24/02 ,  H04W24/08 ,  H04W24/10

Abstract: A method of using additional uplink measurements for MDT UL coverage is provided. A base station (eNodeB) establishes a radio resource control (RRC) connection with a user equipment (UE) in a mobile communication network. The eNodeB and the UE are configured for Minimization of Drive Test (MDT). The eNodeB receives a Power Headroom Report (PRH) corresponds to a Physical Uplink Shared Channel (PUSCH) from the UE, and forwards the PHR to an MDT server. The eNodeB performs uplink measurement of a Demodulation Reference Signal (DM-RS) allocated in the PUSCH. The uplink measurement also involves measuring an uplink Received Interference Power (RIP) associated with the PUSCH. The eNodeB then reports uplink measurement results to the MDT server. The MDT server is able to determine uplink coverage based on the PHR and the uplink measurement results.

Abstract translation: 提供了一种使用额外的上行链路测量用于MDT UL覆盖的方法。 基站（eNodeB）在移动通信网络中建立与用户设备（UE）的无线电资源控制（RRC）连接。 eNodeB和UE配置为最小化驱动测试（MDT）。 eNodeB从UE接收对应于物理上行链路共享信道（PUSCH）的功率余量报告（PRH），并将PHR转发到MDT服务器。 eNodeB执行在PUSCH中分配的解调参考信号（DM-RS）的上行链路测量。 上行链路测量还涉及测量与PUSCH相关联的上行接收干扰功率（RIP）。 eNodeB然后将上行链路测量结果报告给MDT服务器。 MDT服务器能够基于PHR和上行链路测量结果确定上行链路覆盖。