Transmit Power Management for Specific Absorption Rates

A mobile device, comprising:

• a transmitter, wherein the transmitter is configured to operate at a transmit power controlled by a first transmit power limit;
• a proximity sensor configured to determine when the mobile device is in close proximity to a human head;
• a processor;
• and
• a transmit power regulator, implemented on the processor, wherein the transmit power regulator is configured to:
• calculate a cumulative energy amount transmitted by the transmitter over a specified number of frames;
• determine whether the cumulative energy amount exceeds an energy limit;
• calculate a second transmit power limit when the cumulative energy amount exceeds the energy limit, wherein the second transmit power limit is based on the difference between the cumulative energy amount and the energy limit, and further based on a damping factor, and wherein the second transmit power limit is lower than the first transmit power limit;
• and
• cause the transmitter to operate at a transmit power controlled by the second power limit when the proximity sensor determines that the mobile device is in close proximity to a user of the mobile device.