| 摘要 |
An emergency service warning system, arranged to warn a user of approach of emergency services, provided with: at least one movable emergency service transmitter (T) and at least one stationary base station (M), which emergency service transmitter (T) and base station (M) are arranged to communicate utilizing uplink signals (S) and respective downlink signals (d); at least one user receiver (R) which is arranged to detect uplink signals (S) transmitted by the emergency service transmitter (T) and to deliver a warning signal upon detection of an uplink signal (S); wherein the user receiver (R) is arranged to search for uplink signals utilizing information concerning the at least one base station. |
