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Appropriate MAC Sub-layer Algorithms for Body Area Networks and Related Analysis

Omidvar, Hamed | 2013

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 44889 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Nasiri-Kenari, Masoumeh; Vosougi Vahdat, Bijan
  7. Abstract:
  8. WBAN , as one of the most important wireless networks in the near future, has received significant attentions in recent years. The most important designing challenge in these networks is the scarcity of energy resources especially in their sensor nodes. Additionally, special characteristics of these networks have led the other network’s designs, especially the general sensor network protocols to be inefficient for the WBAN. Among others, the existences of recurring patterns in each sensor channel fading and the high correlation among different sensor channels are some of the most important characteristics of WBANs. Considering these characteristics, in this thesis, the MAC sub-layer of WBAN, as the most important factor in controlling the energy consumption in communications parts, has been considered, and accordingly some practical mechanisms based on the IEEE 802.15.6 protocol have been proposed. These mechanisms schedule the time of transmission and the number of packets to be transmitted dynamically and in such a way to be energy efficient and also to meet some predefined QoS requirements. In this regard, three different scenarios with different packet arrival patterns and different QoS requirement have been considered. For these scenarios, two optimal and one sub-optimal mechanism have been proposed. Additionally, by simulation, based on real data, it has been shown that in comparisons with simple ARQ protocols, the proposed protocols not only improve the energy consumption of the sensors substantially, but also provide slightly better reliability of transmission; while guaranteeing packet delay requirements
  9. Keywords:
  10. Wireless Body Area Network ; Multiple Access Control (MAC)Sublayer ; Energy Efficiency ; Partially Observable Markov Decision Process

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