有界网络抖动对数据包时间间隔测量的影响  

Impact of bounded network jitter on measurement of inter-packet delay

作　　者：王昌达[1] 王志斌[1] 周从华[1] 

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212000

出　　处：《计算机应用研究》2014年第8期2492-2496,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(61003288);江苏省自然科学基金资助项目(BK2010192);国家教育部博士点基金资助项目(20093227110005);江苏省六大人才高峰资助项目(1631170006);江苏省高校自然科学研究计划资助项目(07KJB520016);江苏大学高级人才资助项目(07JDG053)

摘　　要：基于IP数据包传输间隔时间变化通信的IP时间隐通道具有较好的隐蔽性,但它易受数据包有界网络抖动的干扰。针对网络中的有界抖动降低IP时间隐通道鲁棒性的问题,提出了一种有界网络抖动与IP时间隐通道通信鲁棒性关系的数学模型。该模型假设通道中的每次抖动均在有界范围内符合均匀分布,以概率统计为理论基础,建立了IP时间隐通道中数据包时间间隔与数据包传输抖动范围的函数关系,能够用于评估有界网络抖动对于时间隐通道鲁棒性的影响。实验结果表明,利用这种数学模型,在有界网络抖动环境中能够实现0误码率的传输。Time interval based IP covert timing channels are stealthier but susceptible to bounded network jitter. To solve the problem that bounded jitter from network could reduce the robustness of the IP covert timing channel,this paper proposed a mathematical model between the bounded jitter from the network and the IP covert timing channel. Under the condition that each jitter in the channel was uniformly distributed within the range bounded,the model established a function of packet transmission jitter range and the time interval between packets based on the theory of probability statistics,and it could be used to evaluate the impact of bounded jitter on the robustness of timing covert channel. The experimental results show that the IP covert timing channel can achieve a transmission bit error rate of 0 with the propose mathematical model.

关 键 词：IP时间隐蔽信道 时间间隔 抖动干扰 有界抖动 编码机制 鲁棒性 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]