中文摘要：

无线链路特性是影响机会网络性能的重要参数。为此,通过数据统计分析及数值计算,从节点间的持续连接时间特性出发,分析现实环境中机会网络的链路统计特性。利用曲线拟合得到节点间持续连接时间的分布函数及变化规律,并通过Matlab对其进行仿真。结果表明,机会网络中无线链路的持续连接时间的分布函数服从指数分布。

英文摘要：

The wireless link characteristic has an important influence on the performance of the opportunistic network.So it is necessary to study the characteristics of wireless link of the opportunistic network.In this paper,according to statistical analysis and numerical methods,the link statistical characteristic in the real opportunities network is analyzed from the contact times of the nodes.The distribution function and the rules with changes of the contact duration of the nodes are gotten through the curve fitting,and are simulated through Matlab.Results show that the probability distribution of the contact duration of wireless link is as the law of exponential distribution.