机会网络中基于消息副本数量的自适应缓存管理策略  

Adaptive cache management method for opportunistic network based on number of message copies

作　　者：刘乔寿[1] 周建二[1] 张普宁[1] 

机构地区：[1]重庆邮电大学光互联网及无线信息网络研究中心,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2011年第4期394-399,共6页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家自然科学基金(61001105);重庆市教委科学技术项目(KJ100521)~~

摘　　要：机会网络中,消息副本数越多,其成功投递的概率越大。首先根据网络历史信息来估计消息的副本数量,并证明网络中生存时间相同的消息的副本数服从正态分布,进而设计出基于消息副本数量的自适应缓存管理方案。仿真结果显示,此缓存管理方案在不增加网络负载率的条件下,可以有效提高消息成功投递率,降低网络平均时延。In the opportunistie networks,if a message has more copies,it will have a higher probability of successful delivery. We first estimate the number of message copies according to the network＇s historical information, and demonstrate the number of the message copies living for the same time is normal distribution. Then an adaptive cache management method based on the nmnber of message copies is proposed. Simulation results show that this method can effectively improve message delivery probability and reduce the network latency, not increasing the network overhead.

关 键 词：机会网络 缓存管理 消息副本 

分 类 号：TN919[电子电信—通信与信息系统]