摘要
在深空探测及通信中,由于通信距离及复杂深空环境的影响,使得通信难度较大,通信质量难以得到保证,组建深空通信网络是解决相关问题的有效途径。而深空骨干网作为深空通信网络的重要组成部分,其组成节点承担了较为繁重的数据转发服务请求,因此,对骨干网节点进行业务量分布分析是保证整个深空通信网络服务质量(QoS)及通信能力的前提。在假设服务请求到达率不为常数的情况下分析了深空骨干网节点的服务请求到达特点,得到了服务请求时间间隔低于限定时间的概率及某时间段内请求数量少于设定阈值的概率。为深空节点业务流量合理分配提供了一定依据,为深空通信数据路由选择提供了指导,即可避免节点拥塞,提升节点QoS提供能力,为深空通信网络路由及通信质量保证提供了较为直观的参考依据。
In the deep space exploration and communication,due to its long distance and complicated environment,it is difficult to communicate and ensure the communication quality.So,an effective method is proposed to construct deep space information networks（DSINs） to resolve these problems.And the deep space backbone network is an important part of the DSINs,the nodes of deep space backbone network responsible for lots of data switching service request,so,analysis related to the traffic distribution of backbone nodes is precondition to guarantee the quality of service（QoS） and communication ability of the entire DSINs.Based on the hypothesis of non-constant service request arrival rate,we get the probability of service request time interval less than a setting time,and also the probability of service requests less than a threshold in a certain period.The results provide a basis for reasonable distribution of traffic and data routing in the deep space communication,and provide guidance in order to avoid traffic congestion.The results can be an intuitive reference in DSINs routing and QoS supply.
出处
《电波科学学报》
EI
CSCD
北大核心
2012年第3期458-464,633,共7页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目(No.61170014)
高等学校博士学科点专项科研基金(No.20090006110014)
教育部科学技术研究重大项目基金(No.311007)
国家重大科技专项(No.2011ZX03003-002)
关键词
深空通信网络
业务量分布
深空骨干网
deep space communication networks
traffic distribution
deep space backbone network
