Efficient multipath forwarding and congestion control without route-labeling in CCN

One advantage of content-centric networking lies in its built-in support for multipath forwarding. In this paper, we propose a multipath forwarding strategy in order to fully utilize available bandwidth in a content-centric network. Using the proposed strategy, each intermediate router sensibly adjusts the amount of traffic forwarded over a given face (among a set of faces) associated with a content name based on the estimated available bandwidth it observes receiving the content through the face. Available bandwidth is sampled and estimated from the actual Data packet flow received at the face. The advantage of our method is that forwarding decision closely matches the congestion status of the forwarding face which results in efficient bandwidth utilization without biasing short round-trip time routes. What is more, by aggregating congestion control states at end users, our method requires neither route labeling nor any other kind of cooperation among routers on the delivery paths. Simulations confirm the effectiveness of our proposed scheme.