高速移动场景中对切换改进方案的研究

Modification of Handover Scheme in High-Speed Railway

在未来的5G通信网络中,高移动场景下的高质量无线通信显得越来越重要。结合绿色通信的概念,利用列车首尾配置的天线,在两个基站的覆盖区域进行切换的过程中,调节这两个基站的传输功率,即适当增加其中一个基站的传输功率,同时适当减少另一个基站的传输功率,最后保证总的传输功率不变。具体地,首先详细研究了功率调整对切换的影响,其次给出改进的切换方案,最后详细分析了切换概率和切换失败概率。仿真结果表明,将切换方案结合功率调整后,可以获得更好的切换表现、更低的切换概率以及更低的切换失败概率,从而有了较好的通信体验。

In the future 5G communication networks, high-quality wireless communication in high-mobility scenarios would become more and more important. In combination with the concept of green communication, the transmission power of the two basestations is adjusted during the handover of the coverage areas of the two basestations by using the antennas configured at the front and rear antennas of the train. That is, the transmission power of one basestation is appropriately increased, while the transmission power of the other properly reduced, and ultimately the total transmission power remains unchanged. Firstly, the impact of power adjustment on handover is discussed in detail. Then, an improved switching scheme is given. Finally, the switching probability and the switching-failure probability are analyzed emphatically. The simulation results indicate that the proposed handover scheme can acquire better performance, lower handover probability and lower handover-failure probability, and thus have better communication experience.