A multi-controller failure handling method for space-based information network based on SDN

Abstract

The invention discloses an SDN-based space-based information network multi-controller failure processing method, comprising the following steps: constructing an SDN-based space-based information network multi-controller failure backup architecture; designing a failure detection mechanism; Paxos Algorithm for Failover Controller Election Algorithm. The invention applies the core technology of SDN to the space-based information network, thereby simplifying the structure of the network equipment, so that the satellite only needs to implement simple forwarding and hardware configuration functions, thereby solving the disadvantages of complex satellite node design and high cost. The SDN-based space-based information network can realize global resource allocation and global optimization, and improve resource utilization. The use of multi-controller architecture can improve the scalability of the space-based information network, so as to achieve flexible and efficient network configuration and management. In addition, this centralized management has a global view of all nodes in the entire network, which can grasp the status of satellite nodes and improve the invulnerability of the network.

Description

technical field [0001] The present invention relates to a software-defined space-based information network (Software Defined Space-based Information Network, referred to as SDSIN), in particular to an SDN-based multi-controller failure processing method for a space-based information network. Background technique [0002] The space-based information network has time-varying topology, which will lead to frequent switching of the on-off state of the inter-satellite link. In addition, satellite nodes will also fail due to attacks or other reasons, resulting in performance problems in the space-based information network. These factors will greatly reduce the invulnerability of space-based information networks. In recent years, the emergence of some new technologies has greatly promoted the development of space-based information networks, such as on-board processing (On-board Processing, OBP), inter-satellite link (Inter-satellite Link, ISL), etc., these technologies are better ...

AI Technical Summary

Problems solved by technology

[0004] At present, some researchers have proposed a space-based information network based on a single SDN controller, in which the controller is placed on the ground, and the calculation and configuration of the entire route is generated by the ground station (GS) and the network operation control center ( NOCC) execution, once the controller of this network fails, the entire network will be in a state of collapse, and the network’s invulnerability is not good

Some researchers have also proposed a failure handling method for failover and neighbor controller takeover. Although this method can improve the invulnerability of the entire network, it will lead to excessive delays.

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