Delay- and Disruption-Tolerant Networking (DTN) is a new communication paradigm that can span across multiple networks and cope with harsh conditions not envisioned in the Internet model. Delay-tolerant networks (DTNs) are partitioned wireless ad hoc networks with intermittent connectivity. Additional terminology in this family of dynamic networks includes disruption-tolerant networks, intermittently connected networks, and opportunistic networks. Routing of the packets in DTN is based on store-carry-and forward paradigm. In this paper, we study and analyze performance of well known PROPHET and Spray and Wait routing protocol , with different mobility models such as Truncated Levy Walk mobility model (TLW) and Random way point (RWP). We evaluate the performance of Routing protocol by varying the buffer size in these mobility models. The MATLAB simulator is used in order to analyze the performance of this protocol. The simulation results shows that Spray and Wait is able to deliver more messages than PROPHET Routing with a lower communication overhead. Keywords: Delay tolerant network, routing protocols, delivery ratio, average delay and overhead ratio, mobility model 1. Introduction Opportunistic networks [1-3] are sparse multi-hop ad hoc networks in which nodes exploit any pair-wise contact opportunities to share and forward messages. There is not any pre-existing internet infrastructure and most of the time it does not exist a complete route from the source to destination in opportunistic networks. Therefore, opportunistic networks have to tolerate partitions and long disconnections. The main challenge for this environment is that conventional routing schemes such as DSR, AODV did not work properly. DTN uses “store-… … middle of paper … …ndra, Singlecopy routing in intermittently connected mobile networks. In Proc. of IEEE Secon’04, 2004 [7] T. Spyropoulos, K. Psounis and C.S.Raghavendra, Spray and wait: Efficient routing in intermittently connected mobile networks. In Proceedings of ACMSIGCOMM workshop on Delay Tolerant Networking (WDTN), 2005 [8] Vahdat A, Becker D, Epidemic routing for partiallyconnected ad hoc networks. Duke University Durham, USA. Technical Report CS-2000-06, 2000 [9] I. Rhee, M. Shin, S. Hong, K. Lee, S. J. Kim, and S. Chong, “On the levy-walk nature of human mobility,” IEEE/ACM Transactions on Networking, vol. 19, no. 3, pp. 630–643, 2011. [10] T.Camp, J.Boleng, V. Davies, “A Survey of Mobility Models for Ad Hoc Network Research” on Wireless Communication & Mobile Computing (WCMC): Special issue on Mobile Ad Hoc Networking: Research, Trends and Applications, 2002, pp. 483-502
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