DefinePK

Abstract

Delay Tolerant Network (DTN) is an approach to address the technical issues in heterogeneous networks that may lack continuous network connectivity. The issues that are related to DTN are delivery probability, overhead, latency and drop rate. To improve message delivery probability and reduce network overhead, routing protocol and buffer management has to be selected efficiently. This scheme is used to decide which message to be transmitted when two nodes come within the transmission range and to decide which message to drop when buffer overflow occurs. This effort improves delivery probability of a message by choosing probabilistic type of routing protocol called as Prophet and a new buffer management policy called as Dynamic Prediction based Multi Queue (DPMQ) drop policy. This routing protocol forwards the message only when the encountered node has the highest probability of reaching the destination than the sending node. The DPMQ drop policy classifies the buffer into three queues such as LPQ, HPQ and DCQ based upon the delivery prediction. This buffer management policy along with Prophet Routing performs well by reducing overhead and latency while improving delivery probability for a global village scenario.