公开(公告)号：US20200296602A1

公开(公告)日：2020-09-17

申请号：US16891885

申请日：2020-06-03

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI ,  Guo-Hau GAU ,  Chia-Hao YU

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

Abstract: A User Equipment (UE), and associated method, including a wireless transceiver, configured to perform wireless transmission and reception to and from a cellular station. A controller is configured to use a first preamble to perform a synchronous transmission on a PRACH to the cellular station via the wireless transceiver, and use a second preamble to perform either of at least two different types of transmission, the two different types of transmission comprising an asynchronous transmission and a synchronous transmission to the cellular station via the wireless transceiver; wherein the controller is further configured to receive a random access response to the synchronous transmission from the cellular station via the wireless transceiver, and wherein a Timing Advance (TA) estimation is not required for the synchronous transmission.

公开(公告)号：US20180279379A1

公开(公告)日：2018-09-27

申请号：US15935400

申请日：2018-03-26

Applicant: MEDIATEK INC.

Inventor： Chiou-Wei TSAI ,  Guo-Hau GAU ,  Chia-Hao YU

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

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：US20180279136A1

公开(公告)日：2018-09-27

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 ,  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 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.