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Token-Based Adaptive MAC for a Two-Hop Internet-of-Things Enabled MANET

شروع موضوع توسط AdMiN ‏19/7/17 در انجمن انجمنMANET

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  1. AdMiN

    AdMiN Administrator هیات مدیره

    In this paper, a distributed token-based adaptive medium access control (TA-MAC) scheme is proposed for a twohop IoT-enabled mobile ad hoc network (MANET). In the TAMAC, nodes are partitioned into different one-hop node groups, and a time division multiple access (TDMA)-based superframe structure is proposed to allocate different TDMA time durations to different node groups to overcome the hidden terminal problem. A probabilistic token passing scheme is devised to distributedly allocate time slots to nodes in each group for packet transmissions, forming different token rings. The distributed time slot allocation is adaptive to variations of the number of nodes in each token ring due to node movement. To optimize the MAC design, performance analytical models are presented in closed-form functions of both the MAC parameters and the network traffic load. Then, an average end-to-end delay minimization framework is established to derive the optimal MAC parameters under a certain network load condition. Analytical and simulation results demonstrate that, by adapting the MAC parameters to the varying network condition, the TA-MAC achieves consistently minimal average end-to-end delay, bounded delay for local transmissions, and high aggregate throughput. Further, the performance comparison with other MAC schemes shows the scalability of the proposed MAC in an IoT-based twohop environment with an increasing number of nodes.​


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