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Enhanced MAC protocol to support multimedia traffic in cognitive wireless mesh networks

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Abstract

With the advanced physical layer techniques such as multiple-input and multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM), transmission real-time 2D/3D contents and applications becomes more and more necessary in wireless networks for the amazing growing in demand of customers. However, the low efficiency of medium access control (MAC) protocol degrades the performance of real-time traffic greatly in multihop, wireless and mobile environment. Focusing on supporting real-time multimedia traffic in cognitive wireless mesh networks (WMNs), an enhanced MAC protocol is proposed. And the contribution of this paper is twofold: (1) An efficient carrier sense multiple access with collision avoidance (CSMA/CA) compatible time division multiple access (TDMA)-like MAC protocol called T-MAC is proposed, which aims to improve the system performance by allocating more channel access time in centralized manner and decreasing overhead. (2) An optimal adaptive scheduling scheme is proposed to support real-time multimedia applications and guarantee QoS for different priority traffic, which aims to find the optimized schedule among all possible sequences of concurrent transmissions by minimizing the occupied resources. Detailed simulation results and comparison with IEEE 802.11e MAC scheme show that the proposed T-MAC can effectively improve quality of service (QoS) for multimedia traffic in terms of throughput, end-to-end delay and packet loss rate, which also manifests that T-MAC is an efficient multimedia applications transmission scheme for mobile terminals and MAPs in cognitive WMNs.

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Acknowledgement

This work was supported by the National Natural Science Foundation of China (No. 60902053), the Science and Technology Research Planning of Educational Commission of Hubei Province of China (No. B20110803), the Natural Science Foundation of Hubei Province of China (No. 2008CDB339), and the Education Research Foundation of South-Central University of Nationalities (No. 20110033). The authors gratefully acknowledge the helpful comments and suggestions of the reviewers.

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Authors and Affiliations

  1. College of Computer Science, South-Central University for Nationalities, 708 Minyuan Road, Wuhan, 430074, China

    Rongbo Zhu, Wanneng Shu & Tengyue Mao

  2. Department of Electronics and Information Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China

    Tianping Deng

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  1. Rongbo Zhu
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  2. Wanneng Shu
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  3. Tengyue Mao
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  4. Tianping Deng
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Correspondence to Tianping Deng.

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Zhu, R., Shu, W., Mao, T. et al. Enhanced MAC protocol to support multimedia traffic in cognitive wireless mesh networks. Multimed Tools Appl 67, 269–288 (2013). https://doi.org/10.1007/s11042-011-0942-7

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