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移动环境下基于策略的QoS两级协商机制研究


□ 刘雪洁 刘衍珩 刘 林 李 岩

   (吉林大学 a.计算机科学与技术学院; b. 符号计算与知识工程教育部重点实验室, 长春 130012)
  
  摘要:
  为了更好地控制移动性对QoS的影响,本文把基于策略思想应用到移动环境中,对基于策略的QoS两级协商机制进行研究,设计了框架中功能实体的内部结构,给出所用策略的形式。进一步对COPS协议进行扩展,用其作为实体间的协商协议,并模拟了协商过程。三个实体的两级协商机制能根据移动节点位置、路径的不同,动态选择协商级别作出决策。扩展COPS协议进行QoS协商,使移动管理与QoS协商相互独立,可用移动事件触发QoS协商,对QoS路径进行部分恢复和重建。
  关键词:基于策略的网络管理;移动切换;服务质量协商;通用开放策略服务协议
  中图分类号:TP393.07文献标志码:A
  文章编号:10013695(2009)03101305
  
  Research of policy based QoS twolevel negotiation mechanism inmobile environment
  
  LIU Xuejiea,b, LIU Yanhenga,b, LIU Lina, LI Yana
  
  (a.College of Computer Science & Technology, b.Key Laboratory of Symbolic Computation & Knowledge Engineering of Ministry of Education,Jilin University, Changchun 130012,China)
  
  Abstract:
  To depress negative influence of mobility to QoS, this paper applys policy in mobile environment and researches policy based Qos twolevel negotiation mechanism. It designed the inner configuration of functional entity in the mechanism and presented policy specific form. Further,it extended COPS as negotiating protocal to communicate during entities and then simulated the process of QoS negotiation. Twotire negotiation mechanism in there entities could choose negotiation level neatly to make decision according to location and path of mobile nodes. It made smobile management to be independent with QoS negotiation protocol by employing extended COPS to Qos negatiation and mobile events could trigger negatiating process to partly recover and rebuild QoS path. ......
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