公开(公告)号：US20210297139A1

公开(公告)日：2021-09-23

申请号：US17257836

申请日：2019-01-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Young Hoon Kwon ,  Pengfei Xia

IPC: H04B7/08 ,  H04W76/19 ,  H04W76/28 ,  H04W72/04 ,  H04L1/00 ,  H04W80/02

Abstract: Embodiments of the present disclosure provide an apparatus and method for beam failure recovery between a UE and a base station operating in a discontinuous reception (DRX) mode. In an embodiment, the UE receives a frame from a base station for determining a radio link quality of a physical downlink control channel (PDCCH). The UE determines whether the frame is received only during the DRX ON state of the DRX mode and that the radio link quality of the PDCCH is less than an acceptable quality threshold. In response, the UE transmits a recovery message to the base station indicating a change to a communication beam used to receive the frame.

公开(公告)号：US11070345B2

公开(公告)日：2021-07-20

申请号：US17004571

申请日：2020-08-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Young Hoon Kwon ,  Pengfei Xia

IPC: H04L5/00 ,  H04B7/06 ,  H04B7/0456

Abstract: A method performed by a base station for measuring a channel state information reference signal (CSI-RS) for non-codebook based uplink (UL) transmission. The method includes transmitting information relating to a sounding reference signal (SRS) resource set for the non-codebook based UL transmission, information relating to a CSI-RS resource, a CSI-RS over the CSI-RS resource, and information relating to CSI-RS measurement restriction for measurement of the CSI-RS according to the CSI-RS measurement restriction. The measurement is for determining precoding information for the SRS resource set. The method includes receiving the SRS resource set, measuring the SRS resource set, and determining one or more SRS resources within the SRS resource set to be used for precoding the UL transmission. The method further includes transmitting a downlink control information (DCI) that indicates the SRS resources within the SRS resource set to be used for precoding the UL transmission, and receiving the UL transmission.

公开(公告)号：US20210076314A1

公开(公告)日：2021-03-11

申请号：US17040544

申请日：2019-04-12

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Qi Wang ,  Ping Fang ,  Yong Cheng ,  Pengfei Xia ,  Wei Huang

IPC: H04W48/16 ,  H04W4/14 ,  H04B17/26 ,  H04W76/12

Abstract: A cell search method and a communication apparatus. The method comprises: before performing cell search, a terminal device can determine, in combination with the historical access information of other terminal device, whether a cell exists at the position, and adjusts, according to the determination result, the value of the search parameter for cell search, for example, if a cell exists, the search is accelerated by adjusting the search parameter; if no cell exists, the search may not be performed or the search parameter may not be adjusted, so as to reduce unnecessary cell search performed by the terminal device, so that the power consumption of the terminal device can be reduced.