公开(公告)号：US20230018093A1

公开(公告)日：2023-01-19

申请号：US17946513

申请日：2022-09-16

Applicant: MediaTek INC.

Inventor： Yi-Ju Liao ,  Wei-De Wu ,  Lung-Sheng Tsai ,  Yi-Chia Lo

IPC: H04W76/28 ,  H04W72/12

Abstract: A method for Downlink Control Information (DCI)-based Physical Downlink Control Channel (PDCCH) monitoring adaptation is proposed. A User Equipment (UE) performs a Discontinuous Reception (DRX) operation. The UE detects a UE-specific DCI format during the DRX operation, wherein the UE-specific DCI format includes a bit field that indicates an adaptation on PDCCH monitoring. The UE adjusts a PDCCH monitoring periodicity in a DRX active time of the DRX operation according to the bit field.

公开(公告)号：US20210320778A1

公开(公告)日：2021-10-14

申请号：US17198989

申请日：2021-03-11

Applicant: MEDIATEK INC.

Inventor： Chi-Hsuan Hsieh ,  Yi-Ju Liao ,  Wei-De Wu

IPC: H04L5/00 ,  H04W72/04 ,  H04L1/18

Abstract: A method for enhancing Bandwidth Part (BWP) operation towards Secondary Cell (SCell) dormancy indication is proposed. A User Equipment (UE) detects a Downlink Control Information (DCI) format including an SCell dormancy indication that indicates an active BWP change for a serving cell. The UE performs BWP switching for the serving cell in response to the DCI format. The UE stops transmission or reception in the serving cell during a time duration from a slot containing a last symbol of the DCI format, wherein the time duration includes a first period of time of delay for the BWP switching and a second period of time of interruption to other active serving cells.

公开(公告)号：US20210037502A1

公开(公告)日：2021-02-04

申请号：US16916270

申请日：2020-06-30

Applicant: Mediatek Inc.

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

IPC: H04W72/02 ,  H04W72/12

Abstract: A UE determines N1 component carriers on each of which the UE is configured to detect a respective one PDCCH in a slot. The UE determines N2 component carriers on each of which the UE is configured to detect respective at least two PDCCHs in the slot. The UE determines a total Q blind detections of PDCCH that the UE is capable of performing. The UE determines a first predetermined scaling factor X. The UE allocates M1 blind detections of the Q blind detections to be available on each of the N1 component carriers and M2 blind detections of the Q blind detections to be available on each of the N2 component carriers such that (N1*M1+N2*M2) is a largest integer no greater than Q. M2 equals to X*M1. The UE performs blind detections in accordance with the allocations.

公开(公告)号：US20200267645A1

公开(公告)日：2020-08-20

申请号：US16790688

申请日：2020-02-13

Applicant: MediaTek Inc.

Inventor： Wei-De Wu ,  Yi-Ju Liao ,  Chi-Hsuan Hsieh

IPC: H04W52/02 ,  H04W36/38 ,  H04W36/06 ,  H04W36/00

Abstract: Various solutions for power saving for New Radio (NR) carrier aggregation in mobile communications are described. An apparatus receives, from a wireless network, a trigger signal. The apparatus switches between a first bandwidth part (BWP) and a second BWP of at least two BWPs for a secondary cell (SCell) in response to receiving the trigger signal. No physical downlink control channel (PDCCH) monitoring is configured for the first BWP while PDCCH monitoring is configured for the second BWP.

公开(公告)号：US20190150129A1

公开(公告)日：2019-05-16

申请号：US16247570

申请日：2019-01-15

Applicant: MEDIATEK INC.

Inventor： Pei-Kai Liao ,  Yi-Ju Liao

IPC: H04W72/04 ,  H04L1/00 ,  H04W72/12

Abstract: A method of two-stage scheduling in downlink control channel is proposed to enhance downlink control information (DCI) forward compatibility and hardware flexibility. The DCI comprises a basic DCI and an extended DCI. The basic DCI provides basic scheduling information of the scheduled data. The extended DCI provides extended scheduling information of the scheduled data channel. The basic DCI can be unicast to a single UE over UE-specific search space. The basic DCI can also be broadcast or multicast to a group of UEs over common search space. UE performs blind detection of the basic DCI only, while the location and size of the extended DCI can be provided by the basic DCI or provided by a higher layer signaling. Cross-slot/subframe and Multi-slot/subframe scheduling can also be applied in the two-stage scheduling.

公开(公告)号：US10050683B2

公开(公告)日：2018-08-14

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 ,  H04B7/0452 ,  H04L27/34

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.

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：US20240284376A1

公开(公告)日：2024-08-22

申请号：US18379642

申请日：2023-10-12

Applicant: MediaTek Inc.

Inventor： Chien-Chun Cheng ,  Wei-De Wu ,  Yi-Ju Liao ,  Din-Hwa Huang ,  Yi-Chia Lo

IPC: H04W56/00 ,  H04W52/02

CPC classification number: H04W56/0075 ,  H04W52/0229

Abstract: Examples pertaining to synchronization and radio resource management in mobile communications are described. A user equipment (UE) receives a periodic low power synchronization signal (LP-SS) from a network node via a low-power wake-up receiver (LP-WUR) of the apparatus. Then, the UE performs a synchronization based on the periodic LP-SS via the LP-WUR of the apparatus in an event that a main radio of the apparatus is in a power saving mode. The synchronization comprises at least a coarse time synchronization and a coarse frequency synchronization.