A Comparative Study of Buffer Management Strategies for Epidemic Routing Protocols in DTN

The intermittent network in which end to end path is not exist between source and destination node, large delay in the message with high data errors and asymmetric data rates are called Delay Tolerant Networks (DTNs). In such type of network Store-Carry and Forwarding (SCF) approach is used to send message between source and destination. Each node in network has limited buffer space to store message. The message is discards or dropped from the buffer space when it is full. To discover which message is discards form the buffer space a number of buffer management strategies are developed by the researcher such as the first in first out (FIFO), Drop oldest, Drop large, Drop last, Drop Random (DR), Drop Least Recently Received (DLR), Evict most forward first (MOFO) and E-drop drop strategies etc. In this paper DLR, MOFO and E-Drop buffer strategies performances are evaluated on Epidemic routing protocol.