Group based two layer multicast for wireless mesh networks supporting mobile sources
Group based two layer multicast for wireless mesh networks supporting mobile sources
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DOI：
10.1109/candar.2013.76
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
H. Morino;Ryoma Iio
中科院分区：
文献类型：
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作者：
H. Morino;Ryoma Iio
从移动的来源提供实时流媒体视频的服务正在变得越来越普遍，包括Ustream。除了在因特网中提供的当前服务之外，预期这种类型的服务将特别地部署在使用无线网状网络的本地社区网络中。为了在无线Mesh网络中提供来自移动的源的实时视频流服务，自适应组播树的构建是需要解决的关键问题。在本文中，我们提出了一个两层组播路由架构，只有预先确定的AP具有组播路由器功能，其余的AP具有第二层交换功能，用于AP到AP的通信。这里，以最接近移动的源终端的路由器为根构建最短路径树，该最短路径树连接最接近每个接收机终端的AP和其余路由器。在带宽利用效率方面，路由器所连接的AP应该被选择为使得沿着组播树的平均端到端跳长度沿着尽可能小。本文提出了两种路由器分配方法，并通过仿真给出了性能评估结果。
Services to provide live streaming video from mobile sources are becoming widespread, including Ustream. It is expected that this type of services will be deployed particularly in local community networks using wireless mesh networks, in addition to the current services provided in the Internet. For providing live video streaming services in wireless mesh networks from mobile sources, adaptive multicast tree construction is the key issue to be addressed. In this paper, we propose a two-layer multicast routing architecture where only pre-determined APs have multicast router functions and the rest of APs have layer 2 switch function for AP-to-AP communication. Here, a shortest path tree is constructed rooted at a router closest a mobile source terminal connecting the rest of routers and APs closest to each of the receiver terminals. In terms of bandwidth utilization efficiency, APs to which routers are connected should be selected so that average end-to-end hop length along the multicast tree is as small as possible. This paper presents two types of router assignment methods, and shows the performance evaluation results by simulation.