Research And Simulation Of Routing Protocol For Space Redundancy Self-Organizing Networks

With the rapid development of space technology, the strategic position of space is becoming more prominent, and the research and application of space redundancy self-organizing networks have also aroused widespread concern from various countries. However, due to open medium, dynamic topology, distributed collaboration, constrained capability and redundancy structure of space redundancy self-organizing networks, there raises a special requirement to the design of routing protocols which has become a research hotspot.Focuses on the characteristics of networks, this thesis designs and implements an on-demand distance vector multi-path SODVM routing protocol in space redundancy self-organizing networks. This routing protocol divides the networks into backbone networks and non-backbone networks, and performs a policy that combines static configuration and dynamic adjustment to achieve the routing control. For backbone networks, by fully making use of characteristics of stable topology of nodes, this protocol adopts the optimal routing strategy for off-line configuration. When the link or node fails, maintaining mechanism adopts link-reverse algorithm to adjust the routes automatically for improving invulnerability. For non-backbone networks, this protocol uses on-demand routing, and designs a node behavior judge algorithm to judge the behavior of non-backbone nodes quickly, and the nodes that have different behaviors adaptively choose the right routing strategy. Both of them adaptively establish and maintain the node-disjoint multi-path routing, such that the load balancing between multiple paths can provide a certain degree of QoS guarantee for routing process.Simulation test is done for designed routing protocol on NS2 software. The test results prove that the routing protocol can well balance load and effectively improve network performance under heavy traffic. At the same time, it is also scalable and robust because when the size of the network is enlarged or topology is changed, the routing protocol can rapidly convergence while neither increase cost nor decrease throughput. Therefore, its performance is outstanding and is suitable for space redundancy self-organizing networks.