RADIO COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide the radio communication system of a high communication success rate. SOLUTION: First of all, while using a frequency channel '6' (step 220), a CPU 27 of portable radio equipment 3 sends a meter activation request to a radio module 28 (step 203) and the radio module 28 of the portable radio equipment 3 calls a wireless handset 5. The radio module 28 of the portable radio equipment 3 detects the busy state of the frequency channel '6' caused by a noise or the like (step 204) and returns an alarm response to the CPU 27 (step 205). The CPU 27 of the portable radio equipment 3 switches the frequency channel '6' to a frequency channel '1' (step 221) and sends a wireless activation request to the radio module 28 again (step 206). The radio module 28 calls the wireless handset 5, the wireless handset 5 transmits the activation message to a meter 7 and the meter 7 transmits a pointer value or the like through the wireless handset 5 to the portable radio equipment 3 as a telegraphic response message (steps 207-209).