隧道内移动通信越区切换区域设置方案的比较研究

研究目的：针对我国城市轨道交通和铁路客运专线移动通信的越区切换位置存在的诸多问题，对隧道内移动通信切换区域的各种设置方案进行研究，为我国城市轨道交通和铁路无线通信网络规划和优化方案提供依据和参考。研究方法：通过对不同切换区域设置方案的分析，结合铁路移动通信技术的发展，从工程经济性、实施性、可靠性等不同方面进行多方案的比选研究。研究结果：提出了不同速度等级的铁路隧道内设置移动通信信号切换区域的几种方案，并对相应的方案做了分析比较。研究结论：隧道内移动通信信号切换区域的设置不仅受物体移动速度和切换时间的制约，还受高速移动带来的信号快衰落及不同制式移动通信系统切换机制的影响。

Comparison Research on the Scheme of Localing the Cross - zone Handover in Tunnel

Research purposes: Many problems about handover exist in the passenger dedicated railway and subway mobile communication.The research was made on the scheme of localing the cross-zone handover.It was proposed for the purpose of providing basis and reference to the wireless communication planning and opitimizing for railway and subway mobile communication.Research methods:In accordance with the analysis of different schemes on localing the cross-zone handover and in combination with the technology development of railway mobile communication system,the comparison and research were made for some programs from the economy and feasibility and dependability for urban transit.Research results:Several schemes on localing the cross-zone handover were presented and comparied.Research conclusions:In the working of localing the cross-zone handover,not only the speed and the time of handover would be considered,but also the fast fading and the mechanism of handover would be considered.