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Terminal synchronization system and method of non-ground network

A terminal synchronization, non-terrestrial technology, applied in transmission systems, radio transmission systems, radio wave measurement systems, etc., can solve the problems of cumbersome and complex synchronization processes, and achieve the effect of simplifying synchronization processes and saving air interface wireless spectrum resources.

Active Publication Date: 2022-07-08
10TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the deficiencies of the prior art, the present invention provides a terminal synchronization system and method for a non-terrestrial network, which solves the problem that in the prior art, the user links between the terminal and all NTN nodes need to be configured with a synchronization channel (SCH), and synchronization The process is cumbersome and complicated

Method used

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  • Terminal synchronization system and method of non-ground network
  • Terminal synchronization system and method of non-ground network
  • Terminal synchronization system and method of non-ground network

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Experimental program
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Embodiment 1

[0055] like Figure 1 to Figure 5 As shown, the present invention optimizes the synchronization channel configuration scheme of each user link, and simplifies the synchronization process of the terminal.

[0056] In the NTN communication system, a terminal needs to establish user links with multiple NTN nodes at the same time.

[0057] Step 1: First, the ground station uses the feeder link to realize the information exchange with the NTN nodes, and divides the NTN nodes in the NTN communication system into an NTN master node and multiple NTN nodes according to the spatial distribution state of the NTN nodes at the current moment. Secondary node, wherein the user link between the NTN master node and the terminal must be configured with a synchronization channel, and the user link between the NTN secondary node and the terminal may not be configured with a synchronization channel. Assuming that there are N NTN nodes in the NTN communication system, all NTN nodes are divided int...

Embodiment 2

[0070] like Figure 1 to Figure 5 As shown, as a further optimization of Embodiment 1, this embodiment includes all the technical features of Embodiment 1, and in addition, this embodiment also includes the following technical features:

[0071] The present invention is applied to the NTN communication or measurement and control system, and the terminal and multiple NTN nodes simultaneously perform communication, measurement and control scenarios.

[0072] For example: communication, measurement and control systems for platforms such as satellites, aviation vehicles, and missiles. Among them, the satellite platform is the main application scenario.

[0073] The following embodiments take a multi-satellite communication system as an example for specific description.

[0074] Defined as Figure 4 The shown geocentric earth-fixed coordinate system ECEF: takes the earth's center as the coordinate origin, the direction of longitude 0 degrees is the x-axis, the direction of longi...

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Abstract

The invention relates to the technical field of non-ground network communication systems, and discloses a non-ground network terminal synchronization system and method.The system comprises a terminal, a ground station and N NTN nodes conducting information interaction with the terminal, the ground station achieves information interaction with the NTN nodes through a feed link, the NTN nodes comprise an NTN main node and N-1 NTN auxiliary nodes, the NTN main node performs information interaction with the terminal through a user link, the N-1 NTN auxiliary nodes perform information interaction with the terminal through the user link, and the NTN nodes 1-N perform information interaction through wireless links among the NTN nodes; a user link between the NTN main node and the terminal is configured with a synchronization channel, and a user link between the NTN auxiliary node and the terminal is not configured with a synchronization channel. According to the method and the device, the problems that in the prior art, synchronization channels need to be configured for user links of the terminal and all NTN nodes, and the synchronization process is tedious and complex are solved.

Description

technical field [0001] The present invention relates to the technical field of non-terrestrial network communication systems, in particular to a terminal synchronization system and method for non-terrestrial networks. Background technique [0002] A non-terrestrial network (Non-terrestrial Network, NTN) communication system consists of NTN nodes, ground stations and ground terminals. Among them, NTN nodes include communication nodes carried by various types of platforms such as high-orbit satellites, medium / low-orbit satellites, near space flight platforms, aircraft, and missiles. The NTN node establishes a feeder link to realize the return of communication data and complete the management of the NTN node; the ground terminal establishes a user link with the NTN node to realize functions such as user data transmission, measurement and control. [0003] Compared with traditional terrestrial cellular networks, the signals of NTN nodes have the significant advantages of wide c...

Claims

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Application Information

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IPC IPC(8): H04J3/06H04B7/185G01S19/42
CPCH04J3/0638H04B7/1851G01S19/42Y02D30/70
Inventor 严平刘田张毅袁田李亮
Owner 10TH RES INST OF CETC