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An Improved Latency- Tolerant MAC Protocol for Underwater Acoustic Sensor Networks

Azar, Zahra | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 40742 (52)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Manzuri, Mohammad Taghi
  7. Abstract:
  8. Wireless networks with the shared media require Medium Access Control (MAC) protocol that provides contention resolution mechanism. The design of MAC protocol is a challenging issue because of limited energy source and high propagation delay in UnderWater Acoustic Sensor Networks (UWASNs). The most important goal of the MAC design for underwater sensor networks is to resolve data packet collision efficiently with respect to energy consumption. So, selection of MAC protocol is an important task because it has significant impact on the system efficiency. A suitable MAC protocol must consider some factors such as fairness, energy consumption, latency and throughput based on various applications. The bandwidth in the acoustic links is very low because of the characteristics of underwater environment. To solve these problems, we propose an MAC protocol that is based on a reserved time slot. A time slot is allocated to each node for sending data in a way the data does not collide with another node's data. Our network can tolerate latency while providing reasonable throughput with low energy consumption. The proposed method uses short ranges of underwater acoustic communication links to achieve higher throughput. The simulation results show that the proposed method increases the overall throughput of the network and reduces energy consumption
  9. Keywords:
  10. Delay ; Sensor Network ; Performance ; Sensor Network ; Acoustic Channels ; Media Access Control Protocol

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