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Method for determining timed advance and related equipment

A technology of timing advance and terminal equipment, applied in the field of communication, can solve the problems of large timing advance error and early arrival of satellites, etc.

Active Publication Date: 2021-02-23
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large timing advance error caused by ephemeris error and positioning error, the terminal equipment uses the random access preamble sent in advance of this timing, and it is easy to arrive at the satellite in advance.

Method used

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  • Method for determining timed advance and related equipment
  • Method for determining timed advance and related equipment
  • Method for determining timed advance and related equipment

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Embodiment Construction

[0047] The embodiment of the present application provides a method for determining timing advance and related equipment. Since the positioning error of the terminal device and the ephemeris (ephemeris) error of the satellite are considered in the process of determining the timing advance, the terminal device uses the timing advance to send The random access preamble can avoid arriving at the satellite in advance, thereby avoiding inter-symbol interference in the subsequent random access process.

[0048] In order to enable those skilled in the art to better understand the solutions of the present application, the following will introduce the embodiments of the present application with reference to the drawings in the embodiments of the present application.

[0049] First, the random access procedure is introduced, see figure 1 , figure 1 It is a schematic diagram of random access.

[0050] 101. The terminal device sends data such as a random access preamble to the network de...

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Abstract

The embodiment of the invention discloses a method for determining timed advance and related equipment, and the method comprises the steps: obtaining the ephemeris information of a satellite, whereinthe ephemeris information comprises the satellite coordinates and the ephemeris error of the satellite; according to the ephemeris information and the position information of the terminal equipment, determining timed advance through a preset rule, wherein the position information comprises the coordinates of the terminal equipment and the positioning error of the terminal equipment, and the presetrule is determined through the first horizontal distance, the first vertical distance, the ephemeris error and the positioning error. According to the method provided by the embodiment of the invention, the timed advance determined by the preset rule is closer to the real time delay condition, and the method can be applied to a non-land network.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method for determining timing advance and related equipment. Background technique [0002] In the 5G new radio (5G new radio, 5G NR) standard protocol, user equipment (UE) is also called terminal equipment, and the initial access to the network (that is, access to network equipment) is a random access method based on competition . During the random access process, after receiving the random access preamble (random access preamble) sent by the terminal device, the network device needs to issue a random access response (random access response, RAR) to the terminal device. Carries timing advance (TA). The terminal equipment uses the timing to adjust the uplink timing in advance. [0003] Satellite communication has the characteristics of large coverage area and flexible networking. At present, both academia and industry are paying attention to the communi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W56/00H04W74/08
CPCH04W56/0045H04W74/0833H04W56/00H04W74/08H04B7/18513H04W56/006
Inventor 王晓鲁罗禾佳徐晨蕾李榕王俊
Owner HUAWEI TECH CO LTD
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