公开(公告)号：US20210083754A1

公开(公告)日：2021-03-18

申请号：US16324902

申请日：2017-06-07

Applicant: China Academy of Telecommunications Technology

Inventor： Yang SONG ,  Qiubin GAO ,  Runhua CHEN ,  Tamrakar RAKESH ,  Xin SU ,  Chuanjun LI ,  Mengjun WANG ,  Yu YANG ,  Hui LI ,  Qiuping HUANG

IPC: H04B7/08 ,  H04B7/0417 ,  H04B7/06

Abstract: The present invention relates to the technical field of wireless communications, and in particular, to a beam training method and device, for use in resolving the problems in the prior art of excessive time-consuming of a beam training process, large overhead of training signals, and relatively low efficiency. According to embodiments of the present invention, a transmit device sends beam training signals in two times. The first sending of a transmit beam training signal is for a receive device to select a transmit beam using a selected receive beam and report the transmit beam. The second sending is that the transmit device sends a receive beam training signal according to the transmit beam information report of the receive device, so as to train the received beam of the receive device. According to the embodiments of the present invention, an interactive beam training method is used to gradually search for the best transmit beam and receive beam, thereby avoiding completing beam training all at once, reducing beam training time and overhead, and improving efficiency.

公开(公告)号：US20190166545A1

公开(公告)日：2019-05-30

申请号：US16317945

申请日：2017-07-11

Applicant: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY

Inventor： Hui LI ,  Qiubin GAO ,  Runhua CHEN ,  Chuanjun LI ,  Xin SU ,  Yang SONG ,  Rakesh TAMRAKAR ,  Yu YANG ,  Qiuping HUANG ,  Mengjun WANG

IPC: H04W48/08 ,  H04L5/00 ,  H04L27/26

Abstract: A method and a device for accessing a system information area or a network area are provided. The method includes: receiving, by a terminal, at least one initial access signal (IAS) transmitted from the system information area or the network area; and obtaining, by the terminal, one or more of a subframe boundary, a system bandwidth, a starting frequency and an ending frequency of the system information area or the network area based on the received IAS.

公开(公告)号：US20180302898A1

公开(公告)日：2018-10-18

申请号：US15770167

申请日：2016-09-29

Applicant: China Academy of Telecommunications Technology

Inventor： Xin SU ,  Yang SONG ,  Chuanjun LI

IPC: H04W72/04 ,  H04B7/06 ,  H04L1/06 ,  H04L5/00

Abstract: Disclosed are a downlink data transmission method, equipment, and system, used for reducing the data transmission pressure of a data forward transmission interface. The method comprises: first equipment receives, by means of a forward transmission interface, data of a scheduled terminal sent by second equipment, the data of the scheduled terminal being data obtained after the second equipment performs first spatial preprocessing on baseband data of the scheduled terminal; the first equipment performs second spatial preprocessing on the data of the scheduled terminal; and the first equipment converts the data, obtained after second spatial preprocessing, into a radio-frequency signal, and sends the radio-frequency signal.