DTCC: A Distributed Congestion Control Scheme for Connectionless Networks

Congestion control in networks is a well-studied problem. In this paper, we propose a distributed congestion control scheme for connectionless networks which tries to attain high delivery ratio, possibly at the cost of higher delay. In situations where the entire network is not congested, this scheme attempts to spread the packets headed towards congestion to uncongested areas, where they can be rerouted towards the destination through alternate uncongested paths if available, or held back at uncongested nodes temporarily (parking) until congestion reduces. Detailed simulation results are given to show that the proposed scheme significantly reduces the number of packet drops in many congestion scenarios.