Efficient and fair Wi-Fi and LTE-U coexistence via communications over content centric networking
Efficient and fair Wi-Fi and LTE-U coexistence via communications over content centric networking
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DOI：
10.1016/j.future.2020.05.026
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发表时间：
2020-11
期刊：
影响因子：
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通讯作者：
Kuo Chi;Xiaojiang Du;Guisheng Yin;Jie Wu;M. Guizani;Qilong Han;Yaling Yang
中科院分区：
文献类型：
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作者：
Kuo Chi;Xiaojiang Du;Guisheng Yin;Jie Wu;M. Guizani;Qilong Han;Yaling Yang
随着移动的业务量越来越大，众多移动的运营商试图寻求一些方法来缓解这种情况，例如将LTE（长期演进）系统扩展到未授权频谱。然而，LTE-U（未授权频谱中的LTE）可能干扰最初在未授权频谱中通信的Wi-Fi系统，并导致Wi-Fi和LTE-U服务质量的显著下降。为了实现Wi-Fi和LTE-U系统在未授权频谱中的公平共存，本文提出了一种基于CCN（内容中心网络）的新型机制，包含LTE-U和Wi-Fi系统之间的两种通信模式（直接和间接）。此外，LTE-U和Wi-Fi系统在未授权频谱中的公平共存可以被视为资源分配问题，并且可以被表示为约束优化问题，其目标是最大化由不同系统在通信周期中传输的数据量，还提出了两种方法来通过调整不同系统的传输时间来解决优化问题。通过NS-3仿真和理论计算对所提出的机制和方法的性能进行了评估，结果表明所提出的机制和方法能够有效地保证LTE-U和Wi-Fi在非授权频谱中的公平共存，提高非授权频谱的整体信道利用率。
With the increasingly huge mobile traffic, numerous mobile operators try to seek some ways to alleviate the situation, such as expanding the LTE (Long Term Evolution) system into unlicensed spectrums. However, LTE-U (LTE in unlicensed spectrums) may interfere with Wi-Fi system that originally communicates in unlicensed spectrums and lead to marked decline of both Wi-Fi and LTE-U service qualities. To enable the fair coexistence of Wi-Fi and LTE-U systems in unlicensed spectrums, a novel mechanism over CCN (Content Centric Networking) containing two modes of communication (direct and indirect) between LTE-U and Wi-Fi systems is proposed in this paper. Moreover, the fair coexistence of LTE-U and Wi-Fi systems in unlicensed spectrums can be regarded as a resource allocation problem and formulated as a constrained optimization problem whose goal is to maximize the amount of data transmitted by different systems in a communication cycle, two approaches are also proposed to solve the optimization problem by adjusting the transmission time of different systems. The performance of the proposed mechanism and approaches is evaluated by simulations via NS-3 and theoretical calculations, the results demonstrate that the proposed mechanism and approaches can effectively ensure the fair coexistence of LTE-U and Wi-Fi in unlicensed spectrums and improve the overall channel utilization of unlicensed spectrums.