T-DMB Receiver Model for Emergency Alert Service

Abstract

This paper presents the method of emergency warning system operation based on T-DMB and the design of T-DMB AEAS(Automatic Emergency Alert Service) receiver model. The proposed receiver model compares the geographical location of emergency with the location of DMB transmitting station from T-DMB broadcasting signal and classifies the receiver location into alert region, neighboring region and non-alert region and transmits the emergency alert message according to each region. The geographical location of emergency can be obtained from FIG(Fast Information Group) 5/2 EWS(Emergency Warning Service) data field for AEAS message and the location of DMB transmitting station can be estimated from either the latitude and the longitude in main identifier and sub identifier in FIG 0/22 data filed for TII(Transmitter Identification Information) or TII distribution database. Thus, the proposed receiver model consists of the checking process of AEAS message from the received DMB signal, the verifying process of DMB transmitting location and the displaying process of AEAS message according to the classified region. In our experiment, we implemented the proposed receiver model with display section, storage section, DMB module for receiving broadcasting signal and control section and performed test emergency alert broadcasting using T-DMB signal generator. From experimental results, we verified that AEAS message can be displayed on the receiver that is located on alert region and neighboring region and cannot be displayed on the receiver that is located on non-alert region.