Accommodating LAA Within IEEE 802.11ax WiFi Networks for Enhanced Coexistence

Accommodating LAA Within IEEE 802.11ax WiFi Networks for Enhanced Coexistence
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在 IEEE 802.11ax WiFi 网络中容纳 LAA 以增强共存

DOI:
10.1109/twc.2020.3014425
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发表时间:
2020-11
影响因子:
10.4
通讯作者:
Ding Zhi
Ding Zhi
中科院分区:
计算机科学1区
文献类型:
--
作者:
Chen Qimei;Ding Zhi

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鉴于5 GHz频段中丰富的非授权频谱,授权辅助接入(LAA)技术提供了一种有效且简单的方法来缓解无线网络中的频谱紧张。IEEE 802.11ax作为一种先进的WiFi标准,以适应更高的速率连接的最新建议,激发了调查的可行性和好处,LAA在共存与未经许可的用户接入在这个新的WiFi协议。在这篇文章中,我们首先介绍了一个增强的LAA和WiFi共存机制的基础上空间多流传输在IEEE 802.11ax接入。然后,我们推导出一个流选择和用户替换策略的基础上提出的同步共存方案,以提高LAA的性能,而不牺牲WiFi吞吐量。我们进一步提出了一个李亚普诺夫算法来优化LAA访问强度水平,具有快速收敛和低复杂度。数值结果表明,所提出的算法的有效性,以及所提出的共存框架的LAA和WiFi用户的共同利益。
Given the abundance of unlicensed spectrum in 5 GHz band, licensed-assisted-access (LAA) technology presents an efficient and simple approach to alleviate the spectrum crunch in wireless networks. The recent proposal of IEEE 802.11ax as an advanced WiFi standard to accommodate more high rate connections motivates the investigation with respect to the feasibility and benefits of LAA in coexistence with unlicensed user access under this new WiFi protocol. In this article, we first introduce an enhanced LAA and WiFi coexistence mechanism based on spatial multi-stream transmission within IEEE 802.11ax access. We then derive a stream selection and user replacement strategy based on the proposed synchronous coexistence scheme to improve LAA performance without sacrificing WiFi throughput. We further present a Lyapunov algorithm to optimize the LAA access intensity level with rapid convergence and low-complexity. Numerical results demonstrate the effectiveness of the proposed algorithms, and the mutual benefits of the proposed coexistence framework to both LAA and WiFi users.
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