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Efficient Multicasting in Content-Centric Networks Using Locator-based Forwarding State
Abstract
The Named Data Networking (NDN) and Content- Centric Networking (CCNx) architectures use a forwarding plane that requires large Forwarding Information Bases (FIB) listing the next hops to name prefixes and Pending Interest Tables (PIT) that maintain per-Interest forwarding state. We introduce CCN- RAMP (Routing to Anchors Matching Prefixes), a new approach to content-centric networking that substitutes the large FIBs and PITs used in NDN and CCNx with small forwarding tables listing anonymous sources of Interests and routers that announce name prefixes being local. The results of simulation experiments comparing NDN with CCN-RAMP based on ndnSIM show that CCN-RAMP requires forwarding state that is orders of magnitude smaller than what NDN requires, and attains smaller end-to-end delays in the dissemination of multicast content to consumers.
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