Patent ID: 7720435

Claim:
A client radio comprising: a client DAB receiver, the DAB receiver configured to receive a polling signal from a remote DAB transmitter, further the DAB receiver connected by internal circuitry to; a client responder, the client responder to provide for detection and clocking of a digital audio broadcast (DAB) bit rate, and further to provide interpretation of digital information within the polling signal received from the from the remote DAB transmitter, and further is configured to receive a timing instruction coupled with a paused alert, the paused alert is configured for on a basis of the timing instruction and the DAB bit rate, further the client responder comprises: a chirp transmitter, the chirp transmitter configured to provide for issuance a predetermined RF signal strength chirp; further the client radio chirp issuance is configured for synchronicity with a multiplicity of other equivalent client radio chirp issuances within a local DAB area, further the synchronicity disposition is provided for by the client radio synchronization response utilization of the digital audio broadcast (DAB) transmission bit rate; whereby, instance of alert communication issuance to the chirp transmitter is determined by utilization of the digital audio broadcast (DAB) embedded timing instruction.