Patent ID: 7679502

Claim:
A tire management system comprising: a plurality of sensor modules, which each measure quantities of state of a tire and transmit the measured data to a vehicle body, each of said plurality of sensor modules being installed inside the tire mounted on a vehicle, and a plurality of receiving modules, which each transmit data request signals requesting said measured data to said sensor module in predetermined cycles and obtain the measured data transmitted from at least one of said plurality of sensor modules, each of said plurality of receiving modules being provided on the vehicle body, wherein each of said plurality of receiving modules transmits the data request signal to said at least one sensor module using a communication channel frequency selected from a plurality of channel frequencies other than any communication channel frequencies which have been used by any of the receiving modules a predetermined number of times to unsuccessfully communicate with said at least one sensor module, and wherein each of said plurality of receiving modules adds the communication channel frequencies which have been used by any of the receiving modules a predetermined number of times to unsuccessfully communicate with said at least one sensor module to a list of prohibited communication channel frequencies only if the list of prohibited communication channel frequencies contains a number of communication channel frequencies less than or equal to a predefined limit.