公开(公告)号：US20190268893A1

公开(公告)日：2019-08-29

申请号：US16282851

申请日：2019-02-22

Applicant: MEDIATEK INC.

Inventor： Cheng-Rung Tsai ,  Ming-Po Chang ,  Chia-Hao Yu ,  Weidong Yang ,  Jiann-Ching Guey

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

Abstract: A method of default uplink beam determination after a beam failure recovery (BFR) procedure in a beamforming system is proposed. For uplink (UL) transmission, the BS provides physical uplink control channel (PUCCH) resource configuration to UE. The configuration includes spatial relation information that indicates the spatial filter to be used by UE for the corresponding PUCCCH transmission. After BFR procedure is completed and before the first spatial relation information indication for a PUCCH resource is received by UE, a default UE TX beam for the PUCCH resource can be determined based on the UE TX beam used during the BFR procedure, e.g., the UE TX beam used to transmit a beam failure recovery request (BFRQ) during the BFR procedure.

公开(公告)号：US20190103908A1

公开(公告)日：2019-04-04

申请号：US16145855

申请日：2018-09-28

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Cheng-Rung Tsai ,  Ming-Po Chang ,  Jiann-Ching Guey

IPC: H04B7/08 ,  H04W24/10 ,  H04W72/04 ,  H04B7/06

Abstract: A method of uplink beam indication for uplink transmission in a beamforming network is proposed. After entering connected mode, both downlink and uplink have a default beam pair link (BPL). Based on uplink beam management, the network establishes mapping between uplink beam indication states and reference signal (RS) resources. The network then signals the uplink beam indication states mapping to UE. UE performs subsequent uplink transmission based on the uplink beam indication, where UE determines its TX beams by mapping from RS resources to corresponding UE TX beams. The uplink beam indication is updated whenever a mapping between a beam indication state to a UE TX beam is changed.

公开(公告)号：US20190068263A1

公开(公告)日：2019-02-28

申请号：US16108765

申请日：2018-08-22

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Weidong Yang ,  Ming-Po Chang ,  Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04L5/00 ,  H04W72/04 ,  H04W24/10 ,  H04W16/28

Abstract: A method of configuring different uplink beam management (UL BM) procedures is proposed. Different UL BM procedures are defined such that UE knows how to transmit the configured uplink reference signal (UL RS) over UL RS resource groups to BS. A first UL BM procedure enables UE to transmit with sweeping TX beams and enables BS to measure with sweeping RX beams (U-1 procedure). A second UL BM procedure enables UE to transmit UL RS on a number of UL resources with a fixed UE TX beam (U-2 procedure). A third UL BM procedure enables UE to transmit UL RS on a number of UL resources with different UE TX beams (U-3 procedure).

公开(公告)号：US20190068262A1

公开(公告)日：2019-02-28

申请号：US16108738

申请日：2018-08-22

Applicant: MEDIATEK INC.

Inventor： Chia-Hao Yu ,  Weidong Yang ,  Ming-Po Chang ,  Cheng-Rung Tsai ,  Jiann-Ching Guey

IPC: H04B7/06 ,  H04B7/0456 ,  H04W72/04 ,  H04L5/00 ,  H04W16/28

Abstract: A method of antenna capability signaling and group-based reference signal resource configuration is proposed. A User Equipment (UE) provides its antenna capability signaling to BS to facilitate the UL beam training. From UE perspective, different antenna structures can be assumed and different beamforming mechanisms can be achieved based on the antenna structures. When BS determines multiple UL beam pair links (BPLs), BS needs to know the UE antenna capability information. In a preferred embodiment, group-based UL RS resources are configured for UL beam determination based on the UE antenna capability signaling, which helps BS to learn the UE beamforming constraints as well as UL beamformed channels corresponding to the UL BPLs.

公开(公告)号：US10009073B2

公开(公告)日：2018-06-26

申请号：US15399754

申请日：2017-01-06

Applicant: MediaTek Inc. ,  NATIONAL TAIWAN UNIVERSITY

Inventor： Cheng-Rung Tsai ,  An-Yeu Wu ,  Ju-Ya Chen ,  Qiang Zhou

IPC: H04B7/02 ,  H04B7/0408 ,  H04B7/06 ,  H04L25/03

CPC classification number: H04B7/0408 ,  H04B7/0617 ,  H04B7/0684 ,  H04B7/0695 ,  H04B7/088 ,  H04L25/0206 ,  H04L25/03898 ,  H04L25/03961

Abstract: A system for acquiring channel knowledge and a method thereof are provided. At least one transmitter generates multiple directional beams in different directions, next modulates the directional beams in the different directions with at least one spreading sequence, so as to enlarge the beam range of each directional beam in the different directions and use the modulated directional beams as training-specific beams in the different directions, and sweeps the multiple training-specific beams in the different directions by using a plurality of antennas, so that at least one receiver measures at least one training-specific beam, and determines the channel knowledge according to the measurement result and beam-related information associated with the at least one training-specific beam, so as to achieve a technical effect of reducing training overhead.