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本文首先通过分析目前卫星数据广播系统中广泛采用的几种文件分发策略,推导得出各种策略下的文件接收成功概率(PoFRS)的计算公式,接着进一步分析比较了各种策略在不同误分组率下的性能,并讨论了其性能与其开销冗余度间的关系。本文的结论对实际应用中如何根据链路误分组率及冗余度代价,从而确定切实可行的文件分发策略,具有重要的指导意义。
In this paper, firstly, by analyzing several file distribution strategies widely used in satellite data broadcasting system, we derive the calculation formulas of PoFRS under various strategies, and then further analyze and compare the various strategies in different error groups Rate of performance, and discusses the relationship between its performance and its overhead redundancy. The conclusion of this paper has important guiding significance for how to determine practical and feasible file distribution strategies according to link mis-grouping rate and redundancy cost in practical application.