机会网络中分块大小对多媒体消息转发的影响  

The impact of fragment size on forwarding of multimedia messages in opportunistic networks

作　　者：张丹[1] 林亚光[1] 张珊珊[1] 李鹏[1] 王小明[1] 

机构地区：[1]陕西师范大学计算机科学学院,西安710119

出　　处：《计算机工程与应用》2016年第1期71-75,共5页Computer Engineering and Applications

基　　金：国家自然科学基金(No.61173094;No.61373083);中央高校基本科研业务费专项资金(No.GK201302027)

摘　　要：在机会网络中,为了在限定时间内快速且成功地转发多媒体消息,通常将消息划分成数据块进行转发。重点研究了数据块大小对多媒体消息转发性能的影响规律,提出一种确定分块大小合理范围的方法并给出了一个经验值。在ONE仿真环境下,对随机游走模型下四种经典路由的延迟和递交率进行了统计分析以验证此思想。实验结果表明随着分块大小增大,目的节点接收到完整的多媒体消息耗费的延迟呈先下降后上升的规律;在限定的时间内,消息的递交率呈先上升后下降的规律。In order to forward multimedia messages completely and quickly in a limited time, nodes divide messages into several fragments and send fragments separately in opportunistic networks. The influence of fragments size on the performance of multimedia messages forwarding is mainly studied, then a method of determining the reasonable scope of the fragments size and an experience value are put forward. De Lay and message deliver ratio are analyzed under the random walk model of four classic routing in ONE environment. The results show that with the increase of the fragment size, the delay of destination node received the complete message presents a trend of first decline and then increases; and within a limited time, message delivery ratio tends to increase first and then decline.

关 键 词：机会网络 多媒体消息 数据分块 期望通信时间 期望通信次数 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]