基于喷泉码的异构卫星网络缓存技术
Caching in Heterogeneous Satellite Networks with Fountain Codes
摘要:
本文研究了异构卫星网络中基于喷泉码的缓存方案的性能。我们考虑多个高速缓存辅助集线器连接到地球同步卫星通过回程链路。为了减少卫星回程链路上的平均传输次数,我们提出了一种基于喷泉码的缓存方案。我们推导出一个简单的平均回程传输速率的解析表达式,并提供了一个tightupper绑定上it.此外,我们展示了如何基于喷泉码的缓存方案的性能是类似于基于最大距离可分离码的缓存方案。
英文摘要:
In this paper we investigate the performance of caching schemes based on fountain codes in a heterogeneous satellite network. We consider multiple cache-aided hubs which are connected to a geostationary satellite through backhaul links. With the aimof reducing the average number of transmissions over the satellite backhaul link, we propose the use of a caching scheme based on fountain codes. We derive a simple analytical expression of the average backhaul transmission rate and provide a tightupper bound on it. Furthermore, we show how the performance of the fountain code based caching scheme is similar to that of a caching scheme based on maximum distance separable codes.
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