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Millions of commuters use public transportation every day. Though this “downtime” offers a significant opportunity for mobile subscribers to conduct business or communicate with others, in most situations mobile usage is not possible due to lack of wireless coverage and capacity within subways and tunnels. | BACKGROUND Millions of commuters use public transportation every day. Though this downtime offers a significant opportunity for mobile subscribers to conduct business or communicate with others in most situations mobile usage is not possible due to lack of wireless coverage and capacity within subways and tunnels. CASE STUDY THE PROBLEM A major wireless service provider in the northeastern United States recognized unrealized opportunity that lay in the five-mile stretch of tunnel with no wireless coverage in this major metropolitan area. Providing wireless coverage to mobile subscribers who use the tunnels would allow the service provider to generate additional revenue from the increased minutes of use keep their customers satisfied and realize an advantage over their competition resulting in reduced subscriber churn. THE ADC SOLUTION The service provider selected ADC because of its unique combination of product performance and quality of service offering the service provider a total solution. ADC helped the provider to become the only wireless carrier to provide coverage within this busy railway tunnel by using a unique digitized optical RF transport solution. CASE STUDY The wireless service provider installed two base transceiver stations BTSs with approximately three to five analog radios on each sector of both cell sites. There were also four code division multiple access CDMA carriers per sector. ADC s seven host units were centralized at one BTS and six host units were centralized at the other BTS. Each host unit was connected via singlemode fiber to a remote cabinet mounted within the tunnel. ADC s patented technology digitizes the entire designated RF band and digitally transports it over fiber. Therefore the signals are replicated at full dynamic range which increases the capability for high data throughput and is essential for delivering future broadband services. Benefits Realized by the Customer Utilizing ADC s digitized RF transport solution has .
