Satellite communication system uplink timing advance gateway station prediction method

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: 2019-12-24
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...

Method used

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  • Satellite communication system uplink timing advance gateway station prediction method
  • Satellite communication system uplink timing advance gateway station prediction method
  • Satellite communication system uplink timing advance gateway station prediction method

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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 satellite communication system uplink timing advance gateway station prediction method. And a gateway station takes the predicted beam center point as a reference point, predicts the timing advance variable quantity of each terminal in the beam and broadcasts the timing advance variable quantity to each terminal in the beam, and each terminal updates the timing advance according to the timing advance variable quantity, thereby coping with the uplink transmission time delay deviation introduced by satellite motion. The working principle is as follows: (1) the gateway station calculates the moment when the wave beam center point receives the next timing advance variable quantity; and (2) the gateway station calculates the effective time period of the next timing advance variable quantity to the beam center point; (3) the gateway station predicts the change range of the uplink transmission delay of the beam center point caused by satellite motion in the effectivetime period; and (4) the gateway station calculates the timing advance variable quantity of the beam center point according to the uplink transmission time delay change range.

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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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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