摘要
SWAN是AdHoc网络中的一种无状态网络协议,利用分布式控制算法来传递分类服务。这种QoS模型把数据业务分为两类进行不同处理,即对尽力而为的UDP和TCP业务采用速率控制的策略而对实时的UDP业务采用基于源节点的接纳控制策略。然而现有模型在路由模块采用普通的路由协议,导致了路由和对整个路径资源探测两个过程分离开来;在接纳控制模块仅仅区分了节点间的业务而没有区分相同节点间的不同业务。该文针对这一问题对现有模型的修改主要体现在两个方面:(1)在路由模块用QoS路由替换了原有普通路由协议,路由和整个路径资源探测由QoS路由完成,从而减少了实时业务等待发送时间;(2)针对SWAN首次提出了基于数据流的服务,并且在接纳控制模块进行了相应修改。最后的仿真中表明了该文的修改是有效的,提高了模型的性能。
SWAN,a stateless networks model in Ad hoc network,was proposed in recent years.SWAN,a stateless network protocol,uses distributed control algorithms to deliver service differentiation in Ad hoc network.SWAN uses rate control for UDP and TCP best-effort traffic,and source-based admission control for UDP real-time traffic.However SWAN implementation to work on the general routing protocols in Ad hoc network,leads to the separation of routing and probing.Admission control of real-time traffic provides service based on nodes,not based on data flow.This paper modifies SWAN in two sides:(1)general routing protocol is replaced by QoS routing protocol,which leads to routing and probing are completed in the same time and reduces the time real-time traffic has waited for.(2)service based on data flow in SWAN is proposed firstly and is applied on admission control.The paper evaluates the modified SWAN through detailed simulation,which proves that the modification is effective and enhances the performance.
出处
《计算机工程与应用》
CSCD
北大核心
2005年第19期123-127,共5页
Computer Engineering and Applications
基金
通信抗干扰技术国家级重点实验室研究项目基金资助(编号:51434100104JS0401)
