室分系统的动态频谱共享方案

Dynamic Spectrum Sharing Solution of Indoor Distribution System

动态频谱共享为运营商在室分系统低频段下实现5G NR覆盖层创造了无限可能,同时,室分系统的动态频谱共享还为运营商免去了频谱重耕或购买新频谱许可证的高昂成本,有助于将LTE用户群平稳过渡到5G,并更快推出独立组网模式。探讨了动态频谱共享的背景、部署以及关键技术方案,主要技术方案有MBSFN子帧方案、LTE打孔方案和NR打孔方案。此外,还进行了室分系统的2.1 G 20 MHz的动态频谱共享实验,在多个采样点分别进行了NR 20 MHz、LTE 20 MHz以及DSS 20 MHz场景下的实验,通过实验数据可以给后续室分系统平滑演进提供一定的参考价值,为后续更大带宽的动态频谱共享技术研究提供一个研究方向。

The dynamic spectrum sharing scheme creates unlimited possibilities for operators to achieve 5 G NR coverage in the low frequency band of the indoor distribution system. Meanwhile, the dynamic spectrum sharing of the indoor distribution system also helps operators to save the high cost of re-farming frequency or purchasing new spectrum licenses, which is beneficial to smoothly transit the LTE users to 5 G and promote the standalone networking mode faster. This paper investigates the background, deployment and key technical solutions of dynamic spectrum sharing, including MBSFN subframe solution, LTE punching solution and NR punching solution. Furthermore, dynamic spectrum sharing experiment with the 2.1 G 20 MHz is carried out in the indoor distribution system, and multiple sampling points are experimented under NR 20 MHz, LTE 20 MHz and DSS 20 MHz scenarios. The experimental data can provide certain reference value for the subsequent smooth evolution of the indoor distribution system, and also provide a direction for the further research on dynamic spectrum sharing technology with larger bandwidth.