Wireless Personal Communications

, Volume 104, Issue 3, pp 1023–1036 | Cite as

Determination of Relay Node Based on Fuzzy Logic in Delay Tolerant Network

  • Ata Abbasi
  • Nahideh DerakhshanfardEmail author


Delay tolerant networks are among mobile ad hoc networks. There is not a complete and connected route between the source and destination in these networks due to the dispersion of the nodes and inconsistency of the links between the nodes every moment. Therefore, store-carry and forward patterns is used to send the data. If the source node encounters the destination node, it delivers the message to the destination or else it waits for an appropriate opportunity. The previous algorithms such as Fuzzy Spray, APRP, AFRON, AFSn, and Enhanced Fuzzy logic-based Spray and wait have used fuzzy logic to manage buffer. It seems that using fuzzy logic to determine the relay node can increase the efficacy of these networks. In this paper to determine the relay node we have used fuzzy logic. The fuzzy system inputs are buffer capacity parameters, remaining energy, and the number of node encountering. The output of fuzzy system can be one of the states of do nothing (don’t send), spray relay, direct transmission and carrier node. The simulation results showed that the proposed method has had improved the similar methods regarding the hop count and the delivery ratio.


Delay tolerant network Relay node Fuzzy logic Delivery ratio Hop count Node energy 



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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Computer Engineering, Tabriz BranchIslamic Azad UniversityTabrizIran

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