Abstract：Research purposes:With the rapid development of WLAN technology in subway，the characteristics of popular standards of WLAN technology are introduced in the article． The bandwidth requirement of passenger information system ( PIS ) and communication based train control ( CBTC ) system are deduced from the analysis of WLAN networking structure and the characteristics of data transmission．Other characteristics of PIS and CBTC wireless network are also analyzed．And possible problems of PIS and CBTC when WLAN is adopted in metro tunnel are discussed．
Research conclusions:Based on the analysis of the bandwidth requirement of the PIS wireless network，only the 802.11a technology or 802.11g technology can be adopted in PIS． The interference between PIS and CBTC can be avoided when 802.11a technology is adopted in PIS，and the interface and implementation of project are easier．But when 802.11g technology is adopted in PIS，the frequency of PIS should be different from the frequency of CBTC，and the project interface is increased．Possible interference from other wireless network should be considered simultaneously．
李佳祎. 轨道交通 PIS 与 CBTC 无线组网技术及干扰分析研究[J]. 铁道工程学报, 2011, 28(6): 88-91.
LI Jia － yi. Analysis of Interference in Wireless Technology between Passenger Information System and Communication Based Train Control System in Subway. 铁道工程学报, 2011, 28(6): 88-91.
GB 50382—2006，Code for Constructional Quality Acceptance of Urban Rail Transit Communication Engineering［S］．
［2］ 李佳祎，黄纯昉．地铁 PIS 系统车地无线技术的探讨［J］． 铁道工程学报，2009(4) :104－107．
Li Jiayi，Huang Chunfang． Exploration on the Wireless Technology for Subway Passenger Information System ［J］． Journal of Railway Engineering Society，2009(4) : 104－107．
Kan Tingming． Research on Technology Development Trends to Urban Rail Transit Passenger Information System［J］． Railway Computer Application，2009 (1) : 37－39．
Deng Hongyuan． About Possibility of Joint Construction of WLAN by CBTC System and PIS System ［J］． Railway Signalling ＆ Communication Engineering，2007 (1) :38－40．
Zhu Chen， Deng Hongyuan． Analysis on WLAN Frequency Planning of Underground Station ［J］． Railway Signalling ＆ Communication Engineering，2008 (1) :35－37．
Huang Baining，Rong Mengtian，Liu Tao，Du Xinhua． Research on Overlapping Factors among Wireless Channels in Channel Allocation Design for CBTC［J］． Computer Engineering and Applications，2009 (25) : 228－230．
［8］ 周芳俊． 地铁列车国产化 PIS 系统通信可靠性研究［J］．铁道机车车辆工人，2010(3) :20－24．
Zhou Fangjun． Research of the Reliability of the Localized PIS System for Metro Cars［J］．Railway Locomotive ＆ Rolling Stock Workers，2010(3) : 20－24．
2011, Vol. 28 
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