Research On Multi-Service Routing Algorithm For Satellite Networks

Satellite network transmission businesses mainly include the large capacity data business like earth observation, delay sensitive business like control information and reliability sensitive business. Each business has different Qo S requirements so that the overall businesses present diverse characteristics. In addition, satellite network has many characteristics, such as high dynamic topology, frequent link switching and satellite nodes resource constrained. In summary, the satellite network routing technology should not only adapt to the characteristics of the satellite network, but also guarantee the Qo S requirements of all types of businesses to realize the real-time data transmission with high efficiency.Analyzed and summarized domestic and international satellite network routing technology, this paper developed the study of the structure and the characteristics of satellite networks deeply. According to the characteristics of different satellite networks, it introduced the multi-objective decision theory and load balancing method to guide satellite network routing algorithm, which meets the Qo S requirements of different services and balances the load of the whole network.The main innovation and research results of this paper are summarized as follows:(1) In view of the unbalanced link resource and insufficient matching of different business and its corresponding quality of service with LEO satellite, a routing algorithm based on multi-objective decision making is proposed. Based on evaluating a variety of communication attributes of existing nodes, the algorithm considered different Qo S business requirement. In order to achieve optimization of multi-objective dynamic routing, it chose the communication node which is suitable for business characteristics in the routing process. The simulation results show that, the algorithm not only satisfies the Qo S constrain while balancing the traffic load of the satellite link effectively, but also improves the performance on the throughput.(2) For GEO/LEO double layer satellite networks satellite nodes with limited resources, link delay interlayer interplanetary larger problems is proposed based on GEO/LEO double layer satellite networks multiservice routing algorithm. Discretized satellite network topology, the algorithm defined link initial weights with delay and residual bandwidth and introduced the concept of critical link. Combining business utilization to adjust different business link initial weights, so as to allocate network resources reasonable, content a variety of Qo S requirements and optimize the satellite network link utilization. The simulation results show that the algorithm not only guarantees the delay requirements of different priority business, but also upgrade the properties of throughput and load balancing relatively, improve the performance of satellite network system as a whole.