A communication method suitable for space-based network networking

Abstract

The invention discloses a network communication method applicable to a space-based network. A physical layer mechanism applicable to space-based network communication is provided, thus overcoming the defect that the traditional space-based communication is only applicable to point-to-point communication. The method is applicable to the system workflow of multi-point network communication of a space-based system and is in support of a network access process and a service process, therefore the network control and coordination are simple, the signalling cost is low and the network establishing time is short. The expansibility is high, and therefore, network scale and user demand changes are supported. A system frame structure in consistent with the system workflow is provided, and therefore the method is applicable to the network communication demands of current multiple satellites. A physical layer transmission scheme applicable to the multi-point network communication of the space-based system is provided. The scheme comprises a physical layer signal generation process and resource unit structures. Through design of the frame structure, the propagation time delay is ensured, and therefore, the method is applicable to service with high time sequence demand or high timeliness. Various priorities and various service types are supported, and therefore, the flexibility is high. SYN is carried in the frame structure, therefore, according to a synchronization process, the search time is short, the synchronization establishing time is short, and long term tracking is unnecessary.

Description

technical field [0001] The invention relates to the technical field of multi-node communication, in particular to a communication method suitable for space-based network networking. Background technique [0002] Existing space-based systems mainly support point-to-point communication, and the design of frame structure and multi-frame structure meets the needs of point-to-point transmission. It does not have the functions required for the network access process such as system broadcast, network synchronization, and authentication. The synchronization process adopts the method of initial acquisition based on the sequence firstly, combined with the long-term tracking method using the phase-locked loop, the synchronization acquisition time is long and the implementation complexity is high. [0003] In order to expand to multi-point networking, existing space-based systems are realized by combining time slots or frames on the basis of point-to-point communication systems. This ...

AI Technical Summary

Problems solved by technology

This method requires complex control and coordination between multiple nodes, takes a long time to complete the interaction, and has a large signaling overhead

At the same time, the propagation delay cannot be guaranteed, so it is not suitable for business requirements with high timing requirements or strong real-time performance

Poor flexibility, unable to meet application requirements with multiple business priorities or different business volumes

The scalability is poor. When the number of nodes increases, it is necessary to reorganize the multiframe and increase the interaction time and overhead of control signaling

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