Abstract
Many bandwidth-intensive applications (such as online live, online games, etc.) are more suitable for using multicast to transmit information. Due to the advantages in scalability, Shared Tree (ST) is more suitable for large-scale deployment than Source-Based Tree (SBT). However, in ST-based multicast, all multicast sources need to send multicast data to a center node called a core, which will lead to core overload and traffic concentration. Besides, most existing multicast protocols use the shortest path between the source or the core and each receiver to construct the multicast tree, which will result in traffic overload on some links. In this paper, we propose an Identifier and Locator Decoupled Multicast approach (ILDM) based on Information-Centric Networking (ICN). ILDM uses globally unique names to identify multicast services. For each multicast service, the mapping between the multicast service name and the addresses of multicast tree nodes is stored in the Name Resolution System (NRS). To avoid core overload and traffic aggregation, we presented a dynamic core management and selection mechanism, which can dynamically select a low-load core for each multicast service. Furthermore, we designed a path state-aware multicast tree node selection mechanism to achieve traffic load balancing by using low-load links more effectively. Experimental results showed that our proposed multicast approach outperformed some other multicast methods in terms of core load, number of join requests, link load, traffic concentration, and routing state.
Highlights
With the development of network technology, many bandwidth-intensive applications, such as IPTV, video conferencing, online gaming, and remote education, require the network to deliver information to multiple destinations
The simulation results show that our multicast approach had the following advantages compared with other multicast approaches: (1) it reduced the load of each core and achieve load balancing; (2) it reduced the number of join requests that each router needs to handle; (3) it reduced link load and avoided traffic concentration; (4) it reduced the number of multicast flow states per router
We proposed the multicast approach named Identifier and Locator Decoupled Multicast approach (ILDM) to avoid core overload and achieve traffic load balancing
Summary
With the development of network technology, many bandwidth-intensive applications, such as IPTV, video conferencing, online gaming, and remote education, require the network to deliver information to multiple destinations. To solve the problems faced in IP multicast, we proposed an Identifier and Locator Decoupled Multicast (ILDM) routing approach based on the ICN architecture using the lookup-by-name mechanism. The simulation results show that our multicast approach had the following advantages compared with other multicast approaches: (1) it reduced the load of each core and achieve load balancing; (2) it reduced the number of join requests that each router needs to handle; (3) it reduced link load and avoided traffic concentration; (4) it reduced the number of multicast flow states per router.
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