Development of T-DMB emergency broadcasting system and trial service with the legacy receivers

The emergency broadcasting system based on T-DMB network have been developed and installed in tunnel environment. This paper describes implementation and field test results of the T-DMB emergency broadcasting system in practical tunnel environment. The developed emergency broadcasting system can execute the on-channel repeating function in common environment. And the system provides emergency broadcasting service in accident or disaster environment to legacy T-DMB receivers. According to the field test results, the smooth operation is evaluated for both emergency broadcasting function and on-channel repeating function with legacy T-DMB receivers.