No abstract

The existing opportunistic protocols of Delay Tolerant Network (DTN) occupy much storage and the prediction-based protocols need to calculate and spread much predication information and the scheduling protocols can't accommodate to huge complex network. This paper analyses and summarizes the existing DTN protocols and proposes a new DTN routing protocol called CRHC which is based on hierarchical forwarding and cluster control mechanism. CRHC can efficiently control the routing overhead locally and forward message quickly across the whole network. At last, we compare the CRHC with the classic Epidemic and SMART protocol through OPNET simulation. The result demonstrates that the CRHC can effectively reduce the delivery delay and improve the successive delivery rate.