Space Information Network can not only provide wireless services for global users, but also be regarded as means of information communication in space scientific exploration. To adapt the increasing demand of multimed...
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ISBN:
(纸本)9781538637906
Space Information Network can not only provide wireless services for global users, but also be regarded as means of information communication in space scientific exploration. To adapt the increasing demand of multimedia services, this paper introduces Software Defined Networking (SDN) into Space Information Network to simplify the payload of satellite, improve routing computation efficiency and reduce the network routing cost, etc. We build the network model based on the constellation design. Moreover, we adopt the virtual topology method to generate the topology snapshots to overcome the dynamic change of topology in Space Information Network. And snapshots merging algorithm is designed to reduce the number of snapshots, which reduces the number of calculations for routing tables and network consumption. At last, we improve two algorithms: amoeba algorithm and Ripple-Spreading algorithm and then we design amoeboid-ripple routing strategy consisting of these two algorithms. Simulation results showed that the proposed routing mechanism has lower packet loss rate and traffic failure rate, especially has fewer routing hops than the benchmark mechanism when network load is heavy.
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