Abstract:

Homogeneous nodes in DTN are different in the role and contribution in the communication, as the deployment of location and other reasons. As a result of the custody transfer mode of communication, the hotspot node buffer is prematurely exhausted, leading to congestion. In this paper, we present an Adaptive RoleBased Routing (ARBR) algorithm. With it, each node adjusts the priority parameters itself according to the network load condition and only receives the data from those nodes with equal or larger priority, so the local connectivity is effectively used and the traffic near the key nodes can be suppressed. Simulation results show that, the ARBR can effectively alleviate the bottleneck node congestion, make full use of the random connection communication opportunities and improve the network throughput.

Key words: delay/disruption tolerant network；multipath routing schema；congestion control；node priority