Research In Access Strategy And Channel Allocation And Hand Over Strategy In Satellite Network

The geographical and business-related coverage range in the mobile communication system is extended by the satellite communication system. Besides the routine mobile communication service, it can provide service for all kinds of user located in the air, in the offing and above various areas with complex geographical structure. In this dissertation, the user access strategy, channel hand over strategy, channel allocation strategy about satellite communication network system are discussed and these strategies are important for improving communication quality and reducing call congestion and hand over congestion probability.In this dissertation, the multi-satellites coverage access technology is discussed with an improved strategy. For satellite channel hand over strategy, some hand over flow maps and state changing maps are presented with a mobile model of circle beam of satellite, which can cover the user in a small area. Based on this discussion, the quality of the given channel hand over strategies is analyzed and some numericanalyses are given. As for the channel allocation strategy, based on the user access strategy and mobile model above, combined with the using efficiency of channel resource, a dynamic optimal channel allocation strategy which fits for the satellite network are provided together with simulation analysis.At the end of the thesis, the summary and the future research on this subject are given.