SDN-based space-based information network multi-controller efficacy-losing backup method

Abstract

The invention discloses an SDN-based space-based information network multi-controller efficacy-losing backup method. The method comprises the following steps of constructing an SDN-based space-based information network multi-controller efficacy-losing backup framework; designing an efficacy-losing detecting mechanism; recovering a controller election algorithm based on faults of a Paxos algorithm.The SDN core technology is applied to a space-based information network, and therefore the structure of network equipment is simplified, a satellite just needs to achieve the simple forwarding and hardware configuring functions, and therefore the defect that satellite nodes are complex in design and high in manufacturing cost is overcome. The SDN-based space-based information network can achieveoverall resource distribution and overall optimization, and the resource utilization rate is increased. By adopting the multi-controller framework, the expansibility of the space-based information network can be improved, and therefore the flexible and efficient network configuration and management are achieved. In addition, centralized management has the overall view of all nodes in the whole network, the state of the satellite nodes can be grasped, and the network destroy resistance is improved.

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 space-based information network multi-controller failure backup method. 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 It solves ...

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 failover 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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