Abstract
Device-to-device communications have attracted much more attention recently in the realization of smart cities. In this paper, we propose a network coding (NC) scheme based on device-to-device communication for centralized wireless local area network (WLAN). In centralized WLAN scenarios, users’ communication can be implemented through multiple interaction of access points acted as relay nodes, which are similar to direct link session (DLS) protocol in IEEE 802.11 standard and we named the proposed protocol as advanced DLS scheme, where analytical performance results of the proposed two-way communication system using NC, with and without AP selection, are obtained in multi-AP cases, as well as the asymptotic results in high transmitting power. In addition, the performance comparisons of throughput, delay and collision probability of proposed scheme with IEEE 802.11 are provided in simulation, which present the advantages of centralized WLAN. By the analysis, it is found that the proposed advanced DLS scheme can achieve almost exactly the same bit error ratio performance as the optimal selection at all signal to noise ratio ranges. It is also shown that the proposed transmission scheme significantly outperform the current mode in two-way communication Nakagami channels owing to the diversity order and array gains. The proposed scheme only need little frame modification and can be compatible with the current standard. Finally, simulation results validate the theoretical analysis.
Published Version
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