近海通信中缓存与资源分配联合优化方法

Joint Optimization Method of Cache and Resource Allocation in Offshore Communication

研究了应用边缘缓存技术以解决近海无线网络流量激增问题。引入一种配备无线缓存服务器的浮标,为船舶和用户提供无线通信服务,可有效缓解岸基基站负载。由于浮标的缓存容量和传输功率有限,可能会导致传输时延变大。为了解决这个问题,提出了一种基于Dinkelbach和连续凸近似法的缓存放置和功率分配联合优化算法。仿真结果表明,该算法可以提高缓存命中率并降低系统成本。

This paper investigates the edge caching in maritime wireless networks to cope with traffic surge issue in offshore region.A buoy equipped with a wireless cache server is introduced to provide wireless communication services for ships and users to relieve traffic load of onshore base station.Due to limited cache capacity and transmit power on the buoy,the transmission delay may become large.To tackle this problem,a joint cache placement and power allocation algorithm is proposed based on the Dinkelbach method and successive convex approximation.Simulation results show that the proposed algorithm can improve the cache hit rate and reduce the system cost.