Indoor and outdoor radio communication coverage is permanent issues for the emergencyservices in every country. In earlier times, every local service had its own communicationnetwork. Modern digital radio technology however offers a far better quality ofcommunications and offers furthermore interoperability between different agencies.In Belgium, the national authorities imposed a national tetra radio communicationsnetwork for the emergency agencies, called the ASTRID (All round Semi-cellularTrunked Radio communication with Integrated Dispatching) network (Law, 1998).But the users are becoming increasingly demanding as of the coverage of this network.Consequently, improving the radio coverage has become the biggest issue.
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