摘要
机会网络是一种通过节点移动建立通信链路的无线自组织网络,一般通过消息复制的路由策略传递信息。但该方式将导致链路中存在大量消息副本,对节点缓存形成巨大压力,造成网络拥塞。针对该情况,结合Prophet算法,充分考虑节点缓存对链路状态及传输概率的影响,设计限制消息最大副本数量与及时删除节点缓存中不必要数据包的缓存管理机制,同时在Prophet算法中考虑了缓存比因素。仿真结果表明,该算法可以有效提高消息投递率,降低网络消耗。
The opportunistic network is a wireless ad hoc network that establishes a communication link through node movement.Generally,the information is transmitted through a routing policy that uses message replication.This method results in a large number of message replicas in the link,which puts tremendous pressure on the node cache and causes network congestion.Aiming at this situation,combined with the Prophet algorithm,we fully considered the influence of the node cache on the link state and the transmission probability.Two mechanisms for buffer management are designed,including limiting the maximum number of copies of the message and deleting the node cache in time.The data packet is considered in the Prophet algorithm.The simulation results show that the algorithm can effectively improve the delivery rate of the message and reduce the network consumption.
作者
陈伟洁
CHEN Wei-jie(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《软件导刊》
2019年第7期80-83,共4页
Software Guide
