Abstract: The cable routing design schemes in signaling & communication rooms have a great impact on the convenience and efficiency of the construction, operation and maintenance of the signaling& communication system. From the perspectives of design, construction, operation and maintenance of the signaling & communication system, this paper introduces the characteristics of three main routing schemes, i.e. lower routing, upper routing and upper and lower routing, analyzes their respective advantages and disadvantages, and compares them from 11 indexes. It concludes that the upper routing scheme should be adopted for the cables in the signaling & communication rooms, and finally discusses the key craft points of the upper routing method. This study provides a reference for the construction and design units to choose the proper routing scheme of signaling & communication rooms.

Key words: urban rail transit, signaling &, communication system, signaling &, communication equipment room, cable routing schemes

摘要： 通信信号(简称“通号”)机房线缆走线方案对通号系统的施工、运维的便利性和效率有较大影响。从通号系统设计、施工、运维等角度，介绍城市轨道交通通号机房下走线、上走线、上下走线3种主流走线方案的特征，分析各自的优缺点，并具体从11项指标方面进行比较，得出通号机房线缆宜采用上走线方案的结论，最后探讨上走线方案的施工工艺要点。

关键词: 城市轨道交通, 通号系统, 通号机房, 走线方案