Dr. Yuming Wang Profile

Dr. Yuming Wang

at Huazhong Univ of Science and Technology

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Proceedings Article | 8 February 2005 Paper

Multi-area layered multicast scheme for MPLS networks

Yajie Ma, Zongkai Yang, Yuming Wang, Jingwen Chen

Proceedings Volume 5626, (2005) https://doi.org/10.1117/12.575678

KEYWORDS: Line edge roughness, Switching, Receivers, Internet, Switches, Relays, Network architectures, Forward error correction, Chromium, Electronics engineering

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Multi-protocol label switching (MPLS) is multiprotocols both at layer 2 and layer 3. It is suggested to overcome the shortcomings of performing complex longest prefix matching in layer 3 routing by using short, fixed length labels. The MPLS community has put more effort into the label switching of unicast IP traffic, but less in the MPLS multicast mechanism. The reasons are the higher label consumption, the dynamical mapping of L3 multicast tree to L2 LSPs and the 20-bit shim header which is much fewer than the IPv4 IP header. On the other hand, heterogeneity of node capability degrades total performance of a multicast group. In order to achieve the scalability as well as the heterogeneity in MPLS networks, a novel scheme of MPLS-based Multi-area Layered Multicast Scheme (MALM) is proposed. Unlike the existing schemes which focus on aggregating the multicast stream, we construct the multicast tree based on the virtual topology aggregation. The MPLS area is divided into different sub-areas to form the hierarchical virtual topology and the multicast group is reconstructed into multiple layers according to the node capability. At the same time, the label stack is used to save the label space. For stability of the MALM protocol, a multi-layer protection scheme is also discussed. The experiment results show that the proposed scheme saves label space and decrease the Multicast Forwarding Table in much degree.

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