公开(公告)号：US10708789B2

公开(公告)日：2020-07-07

申请号：US15935386

申请日：2018-03-26

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau ,  Chia-Hao Yu

IPC: H04W16/28 ,  H04L5/00 ,  H04W74/08 ,  H04W72/04 ,  H04W74/00

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a cellular station. The controller selects a downlink reference signal associated with a candidate beam among a plurality of downlink reference signals including Channel State Information-Reference Signal (CSI-RS) resources, Synchronization Signal (SS) blocks, or Physical Broadcast Channel (PBCH) blocks, and determines one from a plurality sets of Physical Random Access Channel (PRACH) preambles and RACH occasions for the selected downlink reference signal according to an association configured between the downlink reference signals and PRACH resources. Also, the controller uses the determined set of PRACH preamble and RACH occasion to perform a PRACH transmission to the cellular station via the wireless transceiver.

公开(公告)号：US10313158B2

公开(公告)日：2019-06-04

申请号：US15861687

申请日：2018-01-04

Applicant: MEDIATEK INC.

Inventor： Guo-Hau Gau ,  Chiou-Wei Tsai

IPC: H04W4/00 ,  H04L25/02 ,  H04L5/00 ,  H04W56/00 ,  H04J13/00 ,  H04W72/04

Abstract: A method for data reception of a random access procedure for a network of a wireless communication system is disclosed. The method comprises receiving a preamble and data of the random access procedure in one message, from a user equipment (UE) of the wireless communication system, obtaining timing advance information according to the received preamble, and performing channel estimation according to a DMRS allocated for demodulation of the received data with a timing advance compensation, wherein the timing advance compensation is an operation of a linear phase rotation in a frequency domain based on the timing advance information.

公开(公告)号：US20180048348A1

公开(公告)日：2018-02-15

申请号：US15674498

申请日：2017-08-10

Applicant: MediaTek Inc.

Inventor： Guo-Hau Gau ,  Ho-Chi Huang ,  Wei-Jen Chen ,  Chiou-Wei Tsai ,  Ju-Ya Chen ,  Mau-Lin Wu

IPC: H04B1/69 ,  H04L5/00 ,  H04W72/04

Abstract: Various novel concepts and schemes pertaining to non-orthogonal multiple access for wireless communications are described. A group orthogonal coded access (GOCA) scheme is introduced to reduce multi-user interference (MUI) and improve performance. A repetition division multiple access (RDMA) scheme is introduced to differentiate user equipment (UEs) by different repetition patterns. A low-density spreading (LDS) scheme is introduced to reduce MUI and improve performance.

公开(公告)号：US10727897B2

公开(公告)日：2020-07-28

申请号：US15674498

申请日：2017-08-10

Applicant: MediaTek Inc.

Inventor： Guo-Hau Gau ,  Ho-Chi Huang ,  Wei-Jen Chen ,  Chiou-Wei Tsai ,  Ju-Ya Chen ,  Mau-Lin Wu

IPC: H04B1/69 ,  H04W72/04 ,  H04L5/00

Abstract: Various novel concepts and schemes pertaining to non-orthogonal multiple access for wireless communications are described. A group orthogonal coded access (GOCA) scheme is introduced to reduce multi-user interference (MUI) and improve performance. A repetition division multiple access (RDMA) scheme is introduced to differentiate user equipment (UEs) by different repetition patterns. A low-density spreading (LDS) scheme is introduced to reduce MUI and improve performance.

公开(公告)号：US10716014B2

公开(公告)日：2020-07-14

申请号：US15935400

申请日：2018-03-26

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau ,  Chia-Hao Yu

IPC: H04W16/28 ,  H04L5/00 ,  H04W72/04 ,  H04W74/08 ,  H04W74/00

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a cellular station. The controller uses one or more first preambles within a PRACH time-frequency resource to perform a synchronous transmission on the PRACH to the cellular station via the wireless transceiver, or uses one or more second preambles within the PRACH time-frequency resource to perform an asynchronous transmission or a synchronous transmission on the PRACH to the cellular station via the wireless transceiver.

公开(公告)号：US20180279378A1

公开(公告)日：2018-09-27

申请号：US15933473

申请日：2018-03-23

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau

IPC: H04W74/08 ,  H04W74/00 ,  H04L5/00 ,  H04W72/04

CPC classification number: H04W74/0833 ,  H04L5/0005 ,  H04L5/0053 ,  H04W48/10 ,  H04W72/0406 ,  H04W74/002

Abstract: A User Equipment (UE) including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network. The controller initiates a random access procedure with the service network by controlling the wireless transceiver to perform wireless transmission using at least one of: a random access preamble configured for System Information (SI) request, and a corresponding Physical Random Access Channel (PRACH) time-frequency resource allocated for the random access preamble. Also, the controller receives a random access response, which includes a Random Access Preamble Identifier (RAPID) only and does not include a Timing Advance (TA) command, an uplink grant, and a temporary Cell Radio Network Temporary Identifier (C-RNTI), from the service network via the wireless transceiver.

公开(公告)号：US20180198646A1

公开(公告)日：2018-07-12

申请号：US15861687

申请日：2018-01-04

Applicant: MEDIATEK INC.

Inventor： Guo-Hau Gau ,  Chiou-Wei Tsai

IPC: H04L25/02 ,  H04L5/00

CPC classification number: H04L25/0202 ,  H04J13/0003 ,  H04L5/00 ,  H04L5/0007 ,  H04L25/02 ,  H04W56/00 ,  H04W56/0015 ,  H04W56/005 ,  H04W72/0413

Abstract: A method for data reception of a random access procedure for a network of a wireless communication system is disclosed. The method comprises receiving a preamble and data of the random access procedure in one message, from a user equipment (UE) of the wireless communication system, obtaining timing advance information according to the received preamble, and performing channel estimation according to a DMRS allocated for demodulation of the received data with a timing advance compensation, wherein the timing advance compensation is an operation of a linear phase rotation in a frequency domain based on the timing advance information.

公开(公告)号：US20180124626A1

公开(公告)日：2018-05-03

申请号：US15802486

申请日：2017-11-03

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei Tsai ,  Guo-Hau Gau

IPC: H04W24/10 ,  H04W24/06 ,  H04W74/08 ,  H04L25/02

CPC classification number: H04W24/10 ,  H04L25/0202 ,  H04L25/0226 ,  H04W24/06 ,  H04W72/0413 ,  H04W72/0446 ,  H04W74/008 ,  H04W74/0833

Abstract: A method of data transmission in a random access procedure for a UE of a wireless communication system including a network comprises obtaining a resource allocated for data transmission and a resource allocated for preamble transmission with these resources allocated in a frequency division multiplexing (FDM) manner, transmitting a preamble and data in the random access procedure to the network according to the obtained resources, and monitoring a response corresponding to the transmitted preamble and data from the network.