On Non-Intrusive Coexistence of eLAA and Legacy WiFi Networks
On Non-Intrusive Coexistence of eLAA and Legacy WiFi Networks
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DOI：
10.1109/icc.2019.8761765
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发表时间：
2019-05
期刊：
影响因子：
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通讯作者：
Qimei Chen;Z. Ding
中科院分区：
文献类型：
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作者：
Qimei Chen;Z. Ding
本文提出了一种增强型授权辅助接入（eLAA）和WiFi共存机制，用于在非授权频谱中部署LTE。具体而言，我们利用清除发送到自身（CTS到自身）帧来将eLAA传输无缝地嵌入WiFi接入协议内。与传统的LAA思想不同，我们提出的eLAA对WiFi用户是非侵入性的，对eLAA和WiFi用户都有利。为了充分考虑WiFi用户的性能，我们建议在载波侦听多路访问与冲突避免（CSMA/CA）机制下插入CTS-to-Self帧。为了进一步提高吞吐量，我们采用纳什讨价还价解决方案（NBS）开发一个公平和最优的免许可资源分配方案，也开发了一个低计算复杂度的算法来解决基于NBS的问题。我们的数值结果证实了分析结果，并证明了所提出的机制的强度。
This paper proposes an enhanced licensed-assisted-access (eLAA) and WiFi coexistence mechanism for LTE deployment in the unlicensed spectrum. Specifically, we utilize the Clear-to-Send-to-Self (CTS-to-Self) frame to seamlessly embed the eLAA transmission within the WiFi access protocol. Unlike traditional LAA ideas, our proposed eLAA is non-intrusive to WiFi users and beneficial to both eLAA and WiFi users. To fully consider the performance of WiFi users, we propose to insert the CTS-to-Self frame under the carrier sense multiple access with collision avoidance (CSMA/CA) mechanism. For further throughput enhancement, we adopt the Nash bargaining solution (NBS) to develop a fair and optimal unlicensed resource allocation scheme and also develop a low computational complexity algorithm to solve the NBS-based problem. Our numerical results corroborate the analytical results and demonstrate the strength of the proposed mechanism.