Double-layered Satellite Network Routing Algorithm

With the increasing requirements on informationalization of society, we are no longer content with the construction of information highways on earth, but more attention has being paid to the space information infrastructure development. With the extended space information requirements and heavy space information dependence, space strength and information have been convinced to be the strategy resources. Integrated Satllite Information Networks (ISIN), as a major means for space information acquisition, fusion, dispatch and process has become a critically strategy project due to its special applications in space spying, environment and disaster monitoring, resource exploration, missile advance warning, navigation, communications, space defense and confrontation, etc. The routing and switching as key components in the ISIN are responsible for the construction of space data link, security monitoring and dispatch of various applications. Therefore, it motivates the ISIN routing and switching researches under space environment with multiple resource constraints. The thesis studies extensively the routing protocol and its quality of service (QoS) algorithm for the ISIN. We propose QoS-guaranteed unicast and multicast routing protocols suitable for a two-layered LEO/MEO satellite architecture, and validate their effectiveness via simulation. Performance comparisons between our proposed QoS-guaranteed routing protocols and conventional protocols are also conducted under different scenarios. Preliminary results demonstrate the validity and effectiveness of our protocols. In parallel with the researches of routing protocols, the thesis develops a satellite simulation environment supporting for one-layered and two-layered satellite architectures based on Network Simulator (NS2) platform. The simulation environment not only provides a common means for satellite routing protocol studies and performance evaluation, but also acts as a simulation platform for our future satellite transport layer protocol researches (satellite transmission control protocol in particularly).