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Improving Routing Protocols in VANETs

Ahmadi, Arman | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47523 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Hemmatyar, Ali Mohammad Afshin
  7. Abstract:
  8. Vehicular ad-hoc networks are forms of mobile ad-hoc networks in which every vehicle can be smart and communicate with surrounding cars and roadside units. The main differences between these networks and mobile ad-hoc networks are high mobility and rapid changes in network connectivity as well as higher scalability and extensibility. The main goal in the vehicular ad-hoc networks is to increase safety for both the passengers and the driver. Since there are high mobility and rapid changes in network connectivity in such networks, there may be no path from a specific source to a destination, so design of new protocols to guarantee parameters such as reliability and less overhead would be mandatory. Traditional protocols can't be used for this purpose and there are a number of proposed protocols which we will discuss some of them in detail in this thesis. In this thesis, we take a brief look at former protocols first and then we explain our proposed protocol in further detail. The proposed protocol is based on location and is designed in a multilayer fashion. This protocol uses a greedy approach and is used for the packets with unique address. We use parameters such as channel quality, processing queues length and density of neighbors of each node for next hop forwarding. Our proposed protocols is then compared to GPSR and CLWPR protocols using NS-3 and SUMO simulators which shows higher packet delivery rate, higher average end to end delay rate and less overhead for our protocol. Average packet delivery rate is increased by 78.3 percent and average end to end delay is also increased by 0.048 seconds, compared to CLWPR protocol
  9. Keywords:
  10. Vehicular Ad Hoc Network (VANET) ; End-to-End Delay ; Routing Protocol ; Position Based Routing Protocol ; Packet Delivery Ratio

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