DINloop based inter-domain multicast with MPLS

To overcome the existing scalability problems, DINloop (Data-in-Network loop) based multicast with MPLS (multiprotocol label switching) is proposed to optimize inter-domain multicast. In our approach, multiple DIN Nodes in the core network form the DINloop using MPLS so that multiple multicast sessions share a single DINloop. We adopts a label stack method to use fewer labels and label switch paths (LSPs) are established between DIN Nodes to create the DINloop. Packet processing module analyzes the coming multicast packet and MPLS Manager assigns a label stack to it. Simulations show that DINloop based multicast uses the least message load needed to form the multicast architecture. In addition, the routing table size in the core router does not increase as the number of multicast group increases, and therefore DINloop based multicast increases the routing scalability for inter-domain multicast. Finally, the multicast delay in DINloop based multicast is moderate lager than other protocols.

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