GSM-R网络基站直放站共同覆盖区多径干扰问题研究

The Study on Multipath Interference of the Common Coverage Area of GSM-R Network Base Station and Repeater

高速铁路GSM-R网络基站直放站共同覆盖区的多径干扰问题是工程实施和网络优化中较为常见的通信掉话原因。研究GSM-R网络多径干扰产生的主要原因和具体场景,针对一种较为常见的场景进行建模,量化分析基站直放站间距离与产生多径干扰的关系,发现移动台距离基站位置越近,产生多径干扰可能性越大,根据模型提出处理多径干扰问题的网络优化思路,并通过C3无线通信超时的网络故障案例验证该优化方法的可行性。

The multipath interference of the common coverage area of high speed railway GSM-R network base station and repeater serves as a frequent reason of drop-call for project implementation as well as network optimization. The paper studies the main reasons and specific situations where GSM-R network multipath interference happens, makes modeling aimed at common situations, quantitatively analyzes the relationship of the distance between base station and repeater and multipath interference, and finds out that the smaller the distance is, the more possible multipath interference is. Furtherly, the paper puts forward network optimization ideas to deal with multipath interference in accordance with the modeling and verifies the feasibility of network optimization by a network fault case that C3 wireless communication overtimes.