Performance evaluation of basic selfish node detection strategy on delay tolerant networking routing protocols

Abstract

A Delay Tolerant Network (DTN) is a network of regional networks with characteristics of intermittent connectivity, opportunistic contacts, scheduled contacts, asymmetric data rates and high error rates. Main applications of DTN are Satellite communication, interplanetary communication and underwater communication networks. Selfish nodes may present in the network which degrades the performance of DTN. DTN nodes are resource constraints is a root cause of selfishness problem. DTN nodes have limited battery power, limited buffer space and limited computational resources. Hence, every DTN node tries to save their resources to achieve more lifetimes in the network. Selfishness of DTN nodes can collapses the well designed routing scheme in DTN and jeopardizes the whole network. Hence, selfish nodes in DTN should be detected and punished to increase the performance of DTN. Basic selfish node detection strategy is used to detect the selfish nodes in DTN, which when used with different DTN routing protocols behave differently in terms of number of selfish node detection. Thorough analysis is done on Basic selfish node detection strategy when used with different DTN routing protocols and found that Direct Delivery router detects least number of selfish nodes and Spray and Wait router detects highest number of selfish nodes in DTN.