Master Degree / Yüksek Lisans Tezleri

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Author: search.filters.author.Atakan, BarışSubject: search.filters.subject.BSWRA

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  • Master Thesis
    Multi-Copy Routing for Delay Tolerant Networks in Iztech
    (Izmir Institute of Technology, 2017) Dusenge, Babrah; Atakan, Barış
    Delay Tolerant Networks (DTNs) are approaches of communication that seeks to address the technical issues in intermittent networks that may lack continuous network connectivity between source and destination for message transmission. In these kinds of networks, opportunistic routing algorithms are needed, where the destination is reached through intermediate mobile nodes by use of store-carry-and-forward strategy. In this thesis, Binary Spray and Wait with Routine Awareness (BSWRA) is proposed in IZTECH. IZTECH is divided into five sub-areas (EEE department, Library, Cafeteria, Gym and Dormitory) with respect to their routine working hours. In our proposed protocol, the working time frame of IZTECH is our main interest which we refer as Routine Awareness (stipulated time frame). The Routine Awareness is added to Binary Spray and Wait (BSW) to increase chances of finding destination node. The proposed protocol improves BSW protocol on delay problem, by treating a node within a new sub-area as a source node. Furthermore, this work addresses the overhead issue in DTN protocols by revising the effect of dropping repeated messages within a sub-area. BSWRA protocol has been implemented and performance analysis has been carried out using NS2 simulator. This work examines the performance of BSWRA with popular DTN protocols (i.e. BSW, ER and PRoPHET Protocols) in terms of message delivery ratio, average end-to-end delay and overhead ratio, by observing the performance parameters of all routing protocols under varying number of nodes, message size and buffer size. The simulation results shows that generally, BSWRA protocol provides a better performance, though with 100 number of nodes and buffer size equal to100MB, ER protocol outperforms all the protocols in terms of average end-to-end delay but with the worst delivery ratio and overhead ratio.