WLAN system performance of PIS and CCTV services based on field test results in 5.2GHz and 5.8GHz

Due to the limitation of frequency resources, Long Term Evolution(LTE) is usually applied for the train-ground communication applications of Communication(CBTC) service, Wireless Local Network (WLAN) is used for the train ground applications of Passenger Information System (PIS) service and Closed Circuit Television(CCTV) service. Train ground communication systems for PIS and CCTV applications are deployed and managed independently in urban rail transit system with WLAN technology. In this paper, we design an WLAN based on the train ground communication system, which includes the PIS and CCTV applications in the urban rail transit system. In order to test the performance of the WLAN based train ground communication system in 5.2GHz and 5.8GHz at the train speed of 140km/h, a real testing environment is set up. Test results show that the the performance of PIS and CCTV applications in 5.2GHZ and in 5.8GHz satisfies urban rail transit communication requirement. And the performance of PIS and CCTV applications in 5.2GHz is better than in 5.8GHz.