公开(公告)号：US11039475B2

公开(公告)日：2021-06-15

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: H04W4/00 ,  H04W74/08 ,  H04W74/00 ,  H04W72/12 ,  H04W24/00 ,  H04W48/16 ,  H04L5/00

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：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：US20200304159A1

公开(公告)日：2020-09-24

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：US10785769B2

公开(公告)日：2020-09-22

申请号：US16559373

申请日：2019-09-03

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Weidong Yang ,  Pei-Kai Liao ,  Wei-De Wu

IPC: H04W72/04 ,  H04L1/18 ,  H04L1/00 ,  H04W88/02

Abstract: A method to improve the design of new radio physical downlink control channel (NR-PDCCH) transmission and to reduce the false alarm rate of NR-PDCCH blind decoding is proposed. The downlink control information (DCI) bits are carried by NR-PDCCH to be transmitted to UEs after CRC attachment, channel encoding, interleaving, and modulation. The proposed NR-PDCCH design is separated into two parts. In a first part, a UE-ID or RNTI is used to derive a CRC mask or a scrambling sequence for CRC attachment of the DCI bits. In a second part, a UE-specific ID is used to derive an interleaver before or after channel encoding of the DCI bits. If the interleaver is placed before channel encoding, it takes the form of a bit interleaver. If the interleaver is placed after channel encoding, it takes the form of a bit interleaver or a channel interleaver.

公开(公告)号：US20200228249A1

公开(公告)日：2020-07-16

申请号：US16835457

申请日：2020-03-31

Applicant: Mediatek Inc.

Inventor： Pei-Kai Liao ,  Ming-Che Lu ,  Yan-Shuo Chang ,  Chien-Hwa Hwang

IPC: H04L1/18 ,  H04W72/04

Abstract: An efficient Hybrid Automatic Repeat Request (HARQ) operation for low-latency and high-performance services in one radio access technology (RAT) in a wireless communication network is proposed. Under the proposed single HARQ operation scheme, an adaptive HARQ-ACK feedback timing is applied based on UE conditions and UE capability to support the tradeoff between low-latency and high-performance applications. In one embodiment, UE signals the network its HARQ-ACK timing capability. Furthermore, an adaptive number of HARQ processes is applied with a fixed HARQ soft buffer size because the hardware cost for HARQ soft buffer does not linearly increase with the number of HARQ processes. In one embodiment, UE determines a nominal HARQ soft buffer size and HARQ soft buffer size for each HARQ process based on a network-configured HARQ process number.

公开(公告)号：US20200008181A1

公开(公告)日：2020-01-02

申请号：US16559373

申请日：2019-09-03

Applicant: MEDIATEK INC.

Inventor： Chien-Hwa Hwang ,  Weidong Yang ,  Pei-Kai Liao ,  Wei-De Wu

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

Abstract: A method to improve the design of new radio physical downlink control channel (NR-PDCCH) transmission and to reduce the false alarm rate of NR-PDCCH blind decoding is proposed. The downlink control information (DCI) bits are carried by NR-PDCCH to be transmitted to UEs after CRC attachment, channel encoding, interleaving, and modulation. The proposed NR-PDCCH design is separated into two parts. In a first part, a UE-ID or RNTI is used to derive a CRC mask or a scrambling sequence for CRC attachment of the DCI bits. In a second part, a UE-specific ID is used to derive an interleaver before or after channel encoding of the DCI bits. If the interleaver is placed before channel encoding, it takes the form of a bit interleaver. If the interleaver is placed after channel encoding, it takes the form of a bit interleaver or a channel interleaver.

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：US20180199311A1

公开(公告)日：2018-07-12

申请号：US15862895

申请日：2018-01-05

Applicant: MediaTek Inc.

Inventor： Weidong Yang ,  Chien-Hwa Hwang ,  Pei-Kai Liao

IPC: H04W68/02 ,  H04W72/04 ,  H04W68/00 ,  H04W72/12 ,  H04W28/06

Abstract: Various solutions for alert signal design with respect to user equipment and network apparatus in mobile communications are described. A first node of a wireless network may transmit an alert signal to a second node of the wireless network. The first node may further perform a mini-slot transmission to the second node. The alert signal indicates presence of the mini-slot transmission. The first node may also receive an alert signal from the second node. The first node may further detect a mini-slot transmission according to the alert signal and receive the mini-slot transmission from the second node.

公开(公告)号：US09794803B2

公开(公告)日：2017-10-17

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 ,  H04L1/18 ,  H04W72/12 ,  H04W74/00 ,  H04W48/12

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.

公开(公告)号：US09730152B2

公开(公告)日：2017-08-08

申请号：US14496148

申请日：2014-09-25

Applicant: MEDIATEK INC.

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

IPC: H04W48/20 ,  H04W48/18 ,  H04W36/00 ,  H04L5/14 ,  H04W28/02 ,  H04W36/30 ,  H04W48/08 ,  H04W88/06

CPC classification number: H04W48/20 ,  H04L5/14 ,  H04L5/143 ,  H04L5/1469 ,  H04W28/0268 ,  H04W36/0022 ,  H04W36/0061 ,  H04W36/0072 ,  H04W36/0083 ,  H04W36/30 ,  H04W48/08 ,  H04W48/18 ,  H04W68/02 ,  H04W88/06

Abstract: To support the new characteristics where FDD carriers and TDD carriers provide different services with different QoS or with different coverage or with different mobility robustness, UE enhancements of FDD-TDD network are proposed. In one embodiment, a dual mode UE in idle mode camps on a source cell and determines a target cell based on the cn domain and/or additional paging information contained in an enhanced paging message. In another embodiment, a dual mode UE may establish an RRC connection with a source cell with TDD carrier, and later is handover or redirected to a target cell supporting voice over IMS. The handover or redirection is based on the cn domain and/or the additional paging information contained in the enhanced paging message.