公开(公告)号：US20210273710A1

公开(公告)日：2021-09-02

申请号：US17325865

申请日：2021-05-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhaohong SONG ,  Dagang ZHANG ,  Ji XIA

IPC: H04B7/06 ,  H04L5/00 ,  H04W72/04

Abstract: The present disclosure relates to methods for obtaining channel state information (CSI), apparatus, and computer storage medium. One example method includes allocating, by a network device to a terminal device according to a preset rule, a transmission resource for transmitting a sounding reference signal (SRS) in a cell to which the terminal device belongs. Transmission resources for transmitting SRSs in different cells do not overlap at all or partially overlap. The network device receives the SRS transmitted by the terminal device on the allocated transmission resource, and performs channel quality estimation based on the received SRS to obtain CSI.

公开(公告)号：US20210204312A1

公开(公告)日：2021-07-01

申请号：US17176788

申请日：2021-02-16

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dagang ZHANG ,  Zhaohong SONG ,  Maozhi TAO

IPC: H04W72/12 ,  H04L5/00 ,  H04W72/04

Abstract: This application provides a downlink control information transmission method and an apparatus. A network device determines that a terminal device is in the first transmission mode in which the terminal device demodulates a PDSCH based on a DMRS. The network device sends a first PDSCH and first DCI to the terminal device. The first DCI includes a first field. The first field indicates, based on a resource allocation type 2, a resource position occupied by the first PDSCH. The terminal device may demodulate the first PDSCH at the resource position indicated by the first field. An existing DCI format indicates a resource position based on a resource allocation type 0 or a resource allocation type 1. The first DCI indicates a resource position based on the resource allocation type 2.

公开(公告)号：US20230164548A1

公开(公告)日：2023-05-25

申请号：US18159188

申请日：2023-01-25

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Dagang ZHANG ,  Zhilong ZHENG

IPC: H04W12/03 ,  H04W12/0431 ,  H04W76/30 ,  H04W76/20

CPC classification number: H04W12/03 ,  H04W12/0431 ,  H04W76/30 ,  H04W76/20

Abstract: The present disclosure relates to data transmission methods and devices. One example data transmission method relates to a primary network device, a secondary network device, and a terminal device. When a carrier change occurs (for example, the secondary network device is to be added, the secondary network device is to be deleted, or the secondary network device is to be changed), the primary network device sends a first message to the terminal device. Before the carrier change, the terminal device performs data encryption and decryption by using a key of the primary network device. The first message indicates the terminal device to still perform, after the carrier change, data encryption and decryption by using the key that is of the primary network device and that is stored in the terminal device.