CAJ | 학술논문

数据缓存在城市车辆网络中有着重要的应用.移动车辆通过缓存数据不仅可以减少自身访问数据的延迟,同时可以为整个网络节省带宽.所以,如何更有效地利用节点有限的存储是目前数据缓存研究的主要内容.重点分析了节点利用收益函数决定如何缓存数据,提出了利用本地访问频率和邻居节点访问频率构建收益函数的方法.最后,通过建立城市车辆网络场景并模拟验证了该收益函数下的数据缓存的优越性.
수거완존재성시차량망락중유착중요적응용.이동차량통과완존수거불부가이감소자신방문수거적연지,동시가이위정개망락절성대관.소이,여하경유효지이용절점유한적존저시목전수거완존연구적주요내용.중점분석료절점이용수익함수결정여하완존수거,제출료이용본지방문빈솔화린거절점방문빈솔구건수익함수적방법.최후,통과건립성시차량망락장경병모의험증료해수익함수하적수거완존적우월성.
Data caching is an important technique in metropolitan vehicle networks. It can increase data availability and significantly improve the efficiency of information access by reducing the access latency and bandwidth usage. However,designing efficient caching algorithms is non-trivial when network nodes have limited memory. This paper analyzed how to cache with the help of benefit function,and proposed a way of using local access frequency and neighboring node access frequency to construct the benefit function. The authors simulated the algorithm using a network simulator (NS2),and its advantage was demonstrated in city scenarios.