Patent ID: 7698578

Claim:
Apparatus comprising: a feed buffer; a transmit buffer; a radio transmitter; at least one temperature sensor; and one or more controllers, wherein: the one or more controllers are configured to control the radio transmitter to transmit data from the transmit buffer at a transmit data rate, the transmit data rate being dependent on the amount of data stored in the transmit buffer; the one or more controllers are configured to cause data to be fed from the feed buffer to the transmit buffer, the one or more controllers are configured to receive signals from the at least one temperature sensor, wherein each signal is indicative of a temperature; the one or more controllers are responsive to receiving from the at least one temperature sensor signals indicating that the temperature has crossed from below to above a first threshold to reduce a feeding rate at which data is fed from the feed buffer to the transmit buffer from a first predetermined rate to a second predetermined rate, wherein the second predetermined rate is non-zero, thereby to control the radio transmitter to reduce transmit power from a first power level to a second power level, wherein the second power level is a non-zero power level; the one or more controllers are responsive to receiving from the at least one temperature sensor signals indicating that the temperature has crossed from below to above a second threshold to switch the radio transmitter off, wherein the second threshold is a maximum operating temperature threshold; and the one or more controllers are responsive to receiving from the at least one temperature sensor signals indicating that the temperature has crossed from above to below a third threshold to switch the radio transmitter on, wherein the third threshold is a switch on temperature threshold, and wherein the second threshold is different to the third temperature threshold.