公开(公告)号：US10931339B2

公开(公告)日：2021-02-23

申请号：US16638265

申请日：2018-07-10

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Qiuping Huang ,  Qiubin Gao ,  Tamrakar Rakesh ,  Xin Su ,  Runhua Chen ,  Hui Li ,  Mengjun Wang

IPC: H04B7/0456

Abstract: Disclosed are a method and device for determining an uplink transmission codebook. The method includes: transmitting by the terminal data transmission capability information to a base station, the data transmission capability information being used to characterize a data transmission capability that current antennas of the terminal can support; receiving by the terminal codebook indication information transmitted by the base station, the codebook indication information including codebook information used for indicating the terminal to perform uplink transmission, and/or information used for characterizing that the base station successfully decodes or fails to decode the data transmission capability information; and determining by the terminal the codebook corresponding to the uplink transmission, according to the codebook indication information.

公开(公告)号：US10790890B2

公开(公告)日：2020-09-29

申请号：US16086009

申请日：2016-12-29

Applicant: China Academy of Telecommunications Technology

Inventor： Wenhong Chen ,  Qiubin Gao ,  Hui Li ,  Runhua Chen ,  Tamrakar Rakesh

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

Abstract: Disclosed in the present invention are a channel state information (CSI) feedback method, a precoding method, a terminal and a base station. The channel state information (CSI) feedback method disclosed in the present invention comprises: a terminal selects a channel state information-reference signal (CSI-RS) resource or a CSI-RS port on a convention subband from among a CSI-RS resource set as configured in a base station according to downlink channel information; the terminal measures a channel quality indicator (CQI) according to the selected CSI-RS resource or CSI-RS port and a precoding matrix set corresponding to the selected CSI-RS resource or CSI-RS port, wherein the precoding matrix set includes one or more preceding matrices, and a physical resource on the convention subband corresponds to a precoding matrix in the precoding matrix set; and the terminal feeds back the CQI and indication information of the selected CSI-RS resource or CSI-RS port. According to the present invention, the matching degree between CSI and channel state may be improved.

公开(公告)号：US10778311B2

公开(公告)日：2020-09-15

申请号：US15774268

申请日：2016-10-26

Applicant: China Academy of Telecommunications Technology

Inventor： Qiubin Gao ,  Shanzhi Chen ,  Runhua Chen ,  Wenhong Chen ,  Hui Li ,  Tamrakar Rakesh ,  Shaohui Sun

IPC: H04B7/06 ,  H04L1/06 ,  H04B7/04 ,  H04B7/0417 ,  H04B7/0456

Abstract: Disclosed are channel state information feedback and data transmission method and apparatus. The method comprises: determining a first codebook on a base station side, the first codebook being a set composed of precoding matrixes; determining a first codebook on a terminal side, the first codebook being a set composed of precoding matrixes; calculating channel state information according to the first codebooks; and feeding back the channel state information to a base station. Data transmission is performed on the terminal on the base station side, and in the data transmission process, some or all of the precoding matrixes in the first codebooks are utilized to perform processing, over a resource allocated to a terminal, on data to be transmitted. By using the present application, precoding matrixes needed for open-loop AMMO calculation can be determined, traversing of whole space is avoided, difficulties in system design and implementation are reduced, and the system performance is improved.