CAJ | 학술논문

该文根据流媒体系统中缓存空间不足及服务延迟的问题,提出一种基于P2P协作的代理缓存流媒体调度算法PCSPC(Proxy-Caching Scheduler based on P2P Cooperation).首先按照流行度高的数据占用较大存储空间的原则,利用媒体文件的存储效率为每个前缀分配相应的存储空间.然后按传输成本将前缀降序排列,代理服务器升序排列,将前缀依次分配到代理服务器上,并且通过理论证明该方法能够有效地减少传输成本.PCSPC算法能够兼顾存储效率与传输成本.仿真实例说明了算法的有效性.
해문근거류매체계통중완존공간불족급복무연지적문제,제출일충기우P2P협작적대리완존류매체조도산법PCSPC(Proxy-Caching Scheduler based on P2P Cooperation).수선안조류행도고적수거점용교대존저공간적원칙,이용매체문건적존저효솔위매개전철분배상응적존저공간.연후안전수성본장전철강서배렬,대리복무기승서배렬,장전철의차분배도대리복무기상,병차통과이론증명해방법능구유효지감소전수성본.PCSPC산법능구겸고존저효솔여전수성본.방진실례설명료산법적유효성.
Lack of cache and service time-delay in the media streaming system are considered. PCSPC (ProxyCaching Scheduler based on P2P Cooperation) is proposed. First according to the principle that more popular data are assigned more cache, corresponding cache is allocated to every media file's prefix. And then prefix sequence and proxy sequence are sorted in ascending and descending order respectively by transmission cost, and this method can reduce transmission cost effectively, which is proved by mathematical method. Both cache efficiency and transmission cost are considered in PCSPC. Simulation results show the effectiveness of the strategy.