The unlicensed spectrum is recently considered one of the defining solutions to meet the steadily growing traffic demand. This, in turn, has led to the enhancement for LTE in Release-13 to enable Licensed-Assisted Access (LAA) operations. The design of the medium access control (MAC) protocol for the LAA system to harmonically coexist with the incumbent WLAN system operating in an unlicensed band is critical and challenging. In this paper, we consider an Integrated Access and Backhaul (IAB) system coexisting with a Wi-Fi network operating at millimeter-wave (mmWave) unlicensed spectrum, for which a listen-before-talk-based (LBT) based medium access mechanism is carefully designed. Additionally, we have considered an in-band system that supports both access and backhaul in a single node where the small-cell or the IAB nodes compete with the WiGig for medium access. We present comprehensive experimental results and give design insights based on the simulation results.

翻译：无许可证频谱最近被视为满足不断增长的交通需求的决定性解决办法之一,这反过来又导致LTE在释放-13中得到加强,以便能够进行有许可证的辅助访问(LAA)操作;为LAA系统设计中型出入控制(MAC)协议,以便与在无许可证带运行的现有WLAN系统和谐共存,这既重要又具有挑战性;在本文件中,我们认为一个综合存取和回路(IAB)系统与在毫米波(mmWave)无许可证频谱运行的Wi-Fi网络并存,为此精心设计了一个以监听为基础的前对话(LBT)中位访问机制;此外,我们考虑了一个在单一节点支持访问和回路的带内系统,其中小细胞或IAB节点与WiGig竞争中位。我们介绍了全面的实验结果,并根据模拟结果提供设计见解。