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A New Data Gathering Technique in Delay Tolarant Mobile Ad Hoc Networks

Zolghadr, Mahdi | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41388 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Sarbazi Azad, Hamid
  7. Abstract:
  8. Delay Tolerant Networks are a variation of Mobile Ad Hoc Networks, in which low density of nodes in the network area results in global disconnectivity among the nodes. In these networks, communication of data throughout the networks takes place by the means of mobility; nodes store data packets and carry them around the network and forward them to other nodes they encounter along the way. In these situations, a proper selection of data to be exchanged between nodes has a great impact on the quality of data distribution in the whole networks. There is a common assumption among most of the techniques presented in category of Delay Tolerant Networks. They assume the probability of more than two nodes meeting at the same time is nearly zero. However, the increase in the number of devices capabable of participating in wireless communicatins especially in social networks can result in a fair local density of nodes in some areas of network, thus violating the mentioned assumption to some extent. In this thesis, we present a new communication protocol assuming the probability of more than two nodes communicating with each other, which we call Non-Pairwise Communication Protocol. According to the result of simulations, our protocol can achieve a better performance in most of the scenrarios compared to the commonly used communication protocol known as Pairwise Communication. We have also presented an analytical model of our Non-Pairwise Communication Protocol which we have shown to be quite consistent with the behavior of the protocol
  9. Keywords:
  10. Mobile Ad Hoc Network ; Delay Tolerant Networks (DTN) ; Delayed Delivery ; Non-Pairwise Communication ; Topology

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