一种具有业务感知的多路径QoS路由策略

发布时间：2018-04-07 19:01

本文选题：.e　切入点：无线Mesh网络　出处：《计算机学报》2014年10期

【摘要】：在基于IEEE 802.11e协议的无线Mesh网络多路径数据传输过程中,为了有效区分不同类型的多媒体数据,802.11e协议的EDCA机制采用了4个具有固定信道竞争参数的AC队列来实现不同业务类型数据包的存储转发,这种参数预设的竞争机制在多跳环境下不能提供有效的业务区分与QoS性能保障.同时,传统的多路径路由大多因为采用了最小跳数为其路由度量,未能反映实时的链路质量和节点状态,因而无法为不同类型的业务流提供其所需的高质量传输路径.为此,文中提出一种基于具有业务感知的多路径QoS路由策略TA2 P(Traffic-Aware AOMDV Protocol),该策略对静态EDCA信道竞争参数分配机制进行了改进,并提出了适用于不同业务类型数据传输的路由判据,以便TA2P能及时地根据MAC层反馈来的统计数据进行高质量路由的选择.仿真结果表明,该策略有效地实现了不同类型业务流之间对信道及无线链路的公平使用.
[Abstract]:In the process of multipath data transmission in wireless Mesh network based on IEEE 802.11e protocol,In order to effectively distinguish different types of multimedia data in 802.11e EDCA mechanism, four AC queues with fixed channel competition parameters are used to store and forward packets of different traffic types.This kind of parameter presupposition competition mechanism can not provide effective service differentiation and QoS performance guarantee in multi-hop environment.At the same time, most of the traditional multipath routing uses the minimum number of hops as its routing metric, and fails to reflect the real-time link quality and node state, so it can not provide high quality transmission paths for different types of traffic.For this reason, this paper proposes a multipath QoS routing policy, TA2 P(Traffic-Aware AOMDV protocol, based on traffic awareness, which improves the allocation mechanism of static EDCA channel competition parameters, and proposes a routing criterion suitable for different traffic types of data transmission.So that TA2P can select high quality routing according to the statistical data of MAC layer in time.Simulation results show that the proposed scheme can effectively achieve fair use of channels and wireless links between different traffic types.
【作者单位】：湖南科技大学计算机科学与工程学院;
【基金】：国家自然科学基金“基于网络编码的无线Mesh网络流媒体传输性能改进研究”(61073186)资助
【分类号】：TN929.5

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