Power efficient communications
A method, system, and device provide power-efficient communications within the context of available power. Transmission and receipt data rates are scalable in accordance with output power available from a power source. Data is transmitted at a data rate determined, at least in part, by the available output power.
1. A wireless communication system, comprising:
a transmitter capable of transmitting data at a data transmission rate; and
an energy harvesting electrical power source, capable of producing an output power that is available to the transceiver,
wherein the transmitter is configured in operation to maximize an average power consumption of the available output power of the energy harvesting power source while maintaining a peak power consumption below the available output power of the energy harvesting power source, and
wherein the transmitter is further configured in operation to:
increase the data transmission rate of the transceiver after a number of consecutive successful transmissions or when the available output power is predicted to increase, unless the data transmission rate is at a maximum value; and
decrease the data transmission rate of the transceiver after one or more unsuccessful transmissions or when the available output power is predicted to decrease.
2. The wireless transmitter system in accordance with claim 1 , where decreasing the data transmission rate comprises lengthening the bit duration of the transmitted data.
3. The wireless transmitter system in accordance with claim 1 , where decreasing the data transmission rate comprises transmitting data with increased redundancy through coding.
4. The wireless transmitter system in accordance with claim 1 , further comprising:
a receiver capable of receiving data at a data reception rate,
wherein the receiver is configured in operation to maximize the average power consumption of the available output power of the energy harvesting power source while maintaining a peak power consumption below the available output power of the energy harvesting power source.
5. The wireless transmitter system in accordance with claim 4 , where the receiver is configured to:
increase the data reception rate when the available output power of the energy harvesting power source is predicted to increase, unless the data reception rate is at a maximum value; and
decrease the data reception rate when the available output power is predicted to decrease.
6. A method of communication, comprising:
determining an available output power of an energy harvesting power source that is currently available for operation;
maximizing an average power used to transmit data while maintaining a peak power consumption below the available output power of the energy harvesting power source;
transmitting data at a data transmission rate;
increasing the data transmission rate after a number of consecutive successful transmissions or when the available output power is predicted to increase, unless the data transmission rate is at a maximum value; and
decreasing the data transmission rate after one or more unsuccessful transmissions or when the available output power is predicted to decrease.
7. The method of claim 6 , where decreasing the data transmission rate comprises lengthening the bit duration of the transmitted data.
8. The method of claim 6 , where decreasing the data transmission rate comprises transmitting data with increased redundancy through coding.