公开(公告)号：US20190313449A1

公开(公告)日：2019-10-10

申请号：US16368853

申请日：2019-03-29

Applicant: MediaTek Inc.

Inventor： Chiou-Wei Tsai ,  Jiann-Ching Guey ,  Chun-Hsuan Kuo

IPC: H04W74/08 ,  H04W72/12 ,  H04W74/00 ,  H04L5/00

Abstract: Techniques and examples of design for initial access in New Radio (NR) unlicensed spectrum (NR-U) are described. An apparatus receives from a base station of a wireless network which transmits one or multiple synchronization signal and PBCH blocks (SS/PBCH blocks) whose indices are indicated in a cyclic-wrapped order subject to a result of listen-before-talk (LBT) in NR-U. The apparatus also transmits a random access request on random access channel (RACH) resources allocated by the base station.

公开(公告)号：US11848878B2

公开(公告)日：2023-12-19

申请号：US16407435

申请日：2019-05-09

Applicant: Mediatek Inc.

Inventor： Chiou-Wei Tsai ,  Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Cheng-Rung Tsai

IPC: H04L5/00 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/02 ,  H04W72/23 ,  H04W72/51 ,  H04W72/21 ,  H04W74/08

CPC classification number: H04L5/0039 ,  H04L5/0055 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/21 ,  H04W72/23 ,  H04W72/51 ,  H04W74/0816

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE detects one or more signals transmitted from a base station in a first unit of a set of units contained in a bandwidth part of an unlicensed carrier, the first unit having contiguous frequency resources. The one or more signals indicating that the base station has occupied the first unit for a first time duration and indicating a schedule of a set of slots in the first time duration for communication with the base station. The UE receives, in a first time slot of the set of slots and from the base station, a control channel.

公开(公告)号：US11653301B2

公开(公告)日：2023-05-16

申请号：US16537537

申请日：2019-08-10

Applicant: MediaTek Inc.

Inventor： Chun-Hsuan Kuo ,  Jiann-Ching Guey ,  Chiou-Wei Tsai ,  Chien-Chang Li ,  Cheng Rung Tsai

IPC: H04W52/02 ,  H04W24/08 ,  H04W72/14 ,  H04L5/00 ,  H04W74/08 ,  H04W8/00

CPC classification number: H04W52/0229 ,  H04L5/0051 ,  H04L5/0055 ,  H04W8/005 ,  H04W24/08 ,  H04W72/14 ,  H04W74/0808

Abstract: Various solutions for wake-up signal and preamble design for mobile communications are described. An apparatus, while in a first mode of operation, receives a wake-up signal (WUS) from a network. In response to receiving the WUS, the apparatus switches to a second mode of operation from the first mode of operation. The apparatus then detects a preamble in downlink (DL) transmissions from the network. In response to detecting the preamble, the apparatus monitors a physical downlink control channel (PDCCH) to check for an uplink (UL) transmission grant for the apparatus from the network.

公开(公告)号：US11641668B2

公开(公告)日：2023-05-02

申请号：US16586267

申请日：2019-09-27

Applicant: MediaTek Inc.

Inventor： Chiou-Wei Tsai ,  Chun-Hsuan Kuo

IPC: H04W74/08 ,  H04W72/12 ,  H04W72/04 ,  H04W72/0446 ,  H04W72/1268

Abstract: Various examples and schemes pertaining to uplink (UL) designs for New Radio (NR) unlicensed spectrum (NR-U) operation in mobile communications are described. An apparatus as a user equipment (UE) receives, from a network node, a scheduling of a plurality of starting slots for an UL transmission by the apparatus. The apparatus performs a listen-before-talk (LBT) procedure and, based on a result of the LBT procedure, the apparatus performs the UL transmission with an initial slot of the UL transmission in one of the plurality of starting slots.

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：US20200053798A1

公开(公告)日：2020-02-13

申请号：US16536508

申请日：2019-08-09

Applicant: Mediatek Inc.

Inventor： CHIOU-WEI TSAI ,  Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Cheng-Rung Tsai

IPC: H04W74/08 ,  H04W72/14

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives, on an unlicensed carrier and from a base station, a downlink signal including Listen-Before-Talk (LBT) parameters, the downlink signal being a non-physical layer signal. The UE performs an LBT operation based on the LBT parameters. The UE transmits an uplink signal to the base station when the LBT operation is successful.

公开(公告)号：US20200053637A1

公开(公告)日：2020-02-13

申请号：US16536611

申请日：2019-08-09

Applicant: Mediatek Inc.

Inventor： CHIOU-WEI TSAI ,  Jiann-Ching Guey ,  Chun-Hsuan Kuo ,  Cheng-Rung Tsai

IPC: H04W48/16 ,  H04L5/00 ,  H04W56/00 ,  H04W72/04 ,  H04W74/08

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE detects a discovery reference signal on an unlicensed carrier. The UE determines timing information of a base station based on a location of the discovery reference signal in a transmission opportunity window of the base station. The UE determines resource elements of a down link control channel transmitted by the base station based on the timing information. The UE decodes the down link control channel.

公开(公告)号：US20190313413A1

公开(公告)日：2019-10-10

申请号：US16377121

申请日：2019-04-05

Applicant: MediaTek Inc.

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

IPC: H04W72/04 ,  H04L12/24

Abstract: Techniques and examples of interlace design for New Radio unlicensed spectrum (NR-U) operation are described. An apparatus (e.g., user equipment (UE)) assigns a plurality of resources to a plurality of interlaces such that, when the plurality of resources cannot be evenly distributed among all the plurality of interlaces, one or more remaining resources of the plurality of resources are assigned to one or more interlaces of the plurality of interlaces. The apparatus then performs an uplink (UL) transmission to a wireless network in a New Radio unlicensed spectrum (NR-U) using the plurality of resources with block interlaced frequency-division multiple access (B-IFDMA).

公开(公告)号：US20190132870A1

公开(公告)日：2019-05-02

申请号：US16169169

申请日：2018-10-24

Applicant: Mediatek Inc.

Inventor： Jiann-Ching Guey ,  Chun-Hsuan Kuo

IPC: H04W74/08 ,  H04W16/14 ,  H04W28/06

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and UE are provided. The UE receive a configuration from a base station, the configuration indicating one or more constraints for constructing and transmitting a multiple-access signature. The UE then constructs the multiple-access signature in accordance with the one or more constraints. The UE autonomously transmits the multiple-access signature to the base station in accordance with the one or more constraints.