| 摘要: |
| Multicast动态地址管理和连接控制是多点会话中的重要问题.基于分层自治结构,文章提出了Multicast地址分配管理机制、主从结构连接管理体系和一种简单多点连接建立算法,简述了它们的工作过程,并通过模拟实验比较了3种地址分配方式,即集中管理方式、分布方式（由Eleftheriadis提出）与分层自治方式.分层自治结构与Internet自组织拓扑结构一致,分层自治地址分配机制结合了集中方式和分布方式的优点,具有较高的整体效率,主从结构连接管理体系也具有较高控制效率,它们都具有较高的鲁棒性、柔韧性和伸缩性. |
| 关键词: 自治系统,Multicast地址管理,连接控制,多点应用,Multicast通信,图,Steiner树,递归算法,阻塞概率,time-out周期. |
| DOI： |
| 分类号: |
| 基金项目: |
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| Hierarchical Multicast Address Management and Connection Control |
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WANG Jian,ZHANG Fu-yan
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| Abstract: |
| Multicast capability at the network layer is necessary in order to reduce the bandwidth requirements of multiparty, multicast applications. Integral to such a capability are multicast address management and multicast routing mechanisms. Multicast address management and connection control are two essential components needing to be solved in the Multipoint applications. Based on hierarchical autonomous structure in accordance with the self-organization topologies of INTERNET, this paper puts forward a multicast address management scheme which sets up the hierarchical partition, which is dynamic, of Multicast address space in order to reduce the blocking probability. Only MAM (multicast address management) in the bottom-layer domain may allocate directly the addresses to multipoint session so that the session acquire the address more rapidly in average. And, a connection control hierarchy (CCH) based on master/slave relationship and a simple efficient building algorithm of multi-point connection are also advanced. The paper also describes the normal operations of multicast address management and multi-point connections controller. With simulation experiment, three of multicast address allocation modes, hierarchical autonomous mode (HAM), central mode (CM) and network-divided mode (NDM) (Eleftheriadis proposed), are compared. The result shows that hierarchical autonomous mode integrates the merits of central mode and network-divided mode, owns high efficiency in the whole. Connection control hierarchy also is efficient in the connection control. They are shown to be highly robust, flexible and scalable. |
| Key words: Autonomous system, multicast address management, connection control, multipoint application, multicast communication, graph, sterner tree, recursive algorithm, blocking probability, time-out periods. |
