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A Gateway Station Prediction Method of Uplink Timing Advance in Satellite Communication System

A technology of timing advance and prediction method, which is applied in the field of satellite communication, can solve problems such as terminal transmission synchronization tracking, and achieve the effect of ensuring uplink synchronization performance, low complexity, and low resource occupation

Active Publication Date: 2021-06-08
成都天奥集团有限公司
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Problems solved by technology

[0007] In order to solve the problem of synchronous tracking of terminal uplink transmission in the satellite communication system, the present invention proposes a gateway station prediction method for the uplink timing advance of the satellite communication system

Method used

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  • A Gateway Station Prediction Method of Uplink Timing Advance in Satellite Communication System
  • A Gateway Station Prediction Method of Uplink Timing Advance in Satellite Communication System
  • A Gateway Station Prediction Method of Uplink Timing Advance in Satellite Communication System

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Embodiment Construction

[0021] The invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] The present invention proposes a satellite communication system uplink timing advance amount gateway station prediction method, which is suitable for the scene where the ground terminal communicates with the ground gateway station through the satellite, and realizes the uplink between multiple terminals within the coverage range of a satellite beam Sync tracking.

[0023] The transmission timing of the satellite communication system is as follows: figure 2 shown.

[0024] T 0 Time: the time when the terminal at the center of the beam that has achieved random access sends the uplink signal in a timing advance manner.

[0025] T 01 Moment: T 0 The uplink signal is sent at all times to arrive at the satellite time.

[0026] T 1 Moment: T 0 Send the uplink signal to reach the gateway station at all times.

[0027] T 2 Time: The moment when the gat...

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Abstract

The invention discloses a gateway station prediction method for the uplink timing advance of a satellite communication system. The gateway station takes the center point of the predicted beam as a reference point, predicts the timing advance variation of each terminal in the beam, and broadcasts to each terminal in the beam , each terminal updates the timing advance according to the variation of the timing advance, so as to cope with the uplink transmission delay deviation introduced by satellite movement. Its working principle is: (1) The gateway station calculates the moment when the center point of the beam receives the next change in timing advance. (2) The gateway station calculates the effective time period of the next timing advance variation to the center point of the beam. (3) The variation range of the uplink transmission delay at the center point of the beam caused by the movement of the satellite within the effective time period of the gateway station prediction. (4) The gateway station calculates the variation of the timing advance of the center point of the beam according to the variation range of the uplink transmission delay.

Description

technical field [0001] The invention belongs to the field of satellite communication, and in particular relates to a gateway station prediction method for uplink timing advance amount of a satellite communication system. [0002] technical background [0003] With the development of my country's aerospace industry, it has gradually become possible to deploy a satellite-based aerospace-integrated mobile communication system. Satellite communication systems can provide global coverage, especially for coverage blind areas of some terrestrial systems, such as mountainous areas, rural areas, seas, and polar regions. In modern mobile scenarios, due to the wide coverage of satellite communication systems, satellite signals can bring incomparable advantages in wireless data caching, content distribution, data return, and regional broadcasting. [0004] The satellite communication system has the characteristics of long-distance transmission and high dynamics, which brings many challe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W74/08H04W84/06
CPCH04W56/001H04W56/004H04W74/0833H04W84/06
Inventor 马松刘田张毅谢伟夏斌李成
Owner 成都天奥集团有限公司
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