TH46705A - Low-power operation in radio, telephone - Google Patents

Abstract

DC60 (18/10/43) Power consumption during low-power sleep mode in the radiophone (104) is minimized. At the set alarm interval, the radiophone's temperature is set (706). An adjustable alarm interval is set in response to temperature (708). After the adjustable alarm interval, the radiophone returns to normal operating mode (730). In this way, the circuit remains in a low-power state for as long as possible. In addition, a low-precision secondary timer is used to measure the sleep period. After the period set by the secondary timer has elapsed, a second period is set by the high-precision timer. The time calibration period is set, and the radiophone exits sleep mode in synchronization with the system time. Power consumption during low-power sleep mode in the radiophone (104) is minimized. At the set alarm interval, the radiophone's temperature is set (706). An adjustable alarm interval is set in response to temperature (708). After the adjustable alarm interval, the radiophone returns to normal operating mode (730). In this way, the circuit remains in a low-power state for as long as possible. In addition, a low-precision secondary timer is used to measure the sleep period. The radiotelephone will revert to normal operating mode (730). In this manner, the circuit will remain in a low-power state for as long as possible. In addition, a low-precision secondary timer is used to measure the sleep period. After the period set by the secondary timer has elapsed, a second period is set by the high-precision timer. The time calibration period is set, and the sleep mode is exited in synchronization with the system time.

Claims (16)

1. Instructions for operating the radiophone, which consist of the following steps: (a) setting the specified alarm interval; (b) entering low-power sleep mode; (c) at the specified alarm interval, (c1) the radiophone temperature is set; (c2) an adjustable alarm interval is set in response to temperature; and (c3) after the adjustable alarm interval, it returns to normal operation mode. 2. The procedure as specified in Claim 1, where procedure (c3) consists of: . Providing power to operate one or more circuits after the adjustable alarm period has elapsed. 3. The procedure as specified in claim 1, where procedure (c3) consists of: providing the oscillator with sufficient operating power before providing power to the other time cycles to ensure stable operation of the oscillator at the specified temperature. 4. Procedure for operating the radiotelephone, which consists of the following steps: (a) setting the specified alarm interval; (b) isolating power from the radiotelephone's operating circuit to enter low-power sleep mode; (c) in response to the clock signal, setting the low-power sleep mode period; at the end of the low-power sleep mode, (d) measuring the temperature; (e) setting the software time to measure the alarm interval with the alarm time based on the temperature value; (f) setting the clock for the software timer; and (g) after the alarm interval, power is supplied to the operating circuit. 5. The procedure as specified in Claim 4, where procedure (c) consists of: (c1) setting the clock for the counter; and (c2) when the counter reaches the set value, it exits low power sleep mode. 6. The procedure as specified in Claim 5, where procedure (e) consists of the following steps: (e1) storing the value in the register; (e2) in response to the clock signal, the value is reduced; and (e3) when the value matches the set value, power is supplied to the operating circuit. 7. Method of operation of the radiophone, which involves the following steps: (a) entering low-power sleep mode; (b) using the hardware clock to set the alarm time; (c) at the alarm time (c1) providing power to the radiophone's designated circuit; (c2) starting the software clock; (d) measuring the set time interval with the software clock; and (e) after the set time interval, providing additional power to the circuit. 8. The procedure as specified in Claim 7, where procedure (b) consists of: (b1) setting the clock for the counter; and (b2) when the counter reaches a predetermined value, it provides power to the processor. 9. The procedure as specified in Claim 8, where procedure (d) consists of the steps of: (d1) storing the value in the register; (d2) in response to the clock signal the value is reduced; and (d3) setting the software clock when the value matches the specified value. 10. The procedure for operating a portable radiotelephone within a radiotelephone system involves the following steps: - Using a high-precision primary timer to set the radiotelephone's operating time, synchronized with the radiotelephone system's time; - Entering low-power sleep mode; - Setting the low-power sleep mode interval using the low-precision secondary timer; - Setting the calibration interval using the primary timer to synchronize the radiotelephone's time with the radiotelephone system's time; and - Exiting sleep mode. 11. The method specified in claim 10, whereby the procedure for determining the duration of the low-power sleep mode, consists of the following steps: - determining a benchmark value relative to the duration of the low-power sleep mode; and - incrementing the counter value until the benchmark value is reached. 12. The method specified in claim 11, in which the timing procedure using the primary timer consists of the following steps: - storing the timer value in the counter; and - decreasing the counter value until it reaches zero. 13. The method of operating a portable radio telephone in a radio telephone system consists of the following steps: - Initiating low-power sleep mode; - Setting the sleep mode interval time; - At the end of the sleep mode interval, activating the primary clock; - Setting the pre-alarm interval time; - After the pre-alarm interval, activating the primary clock; - Setting the calibration time with the primary clock; and - At the end of the calibration period, exiting sleep mode. 14. The method described in Claim 13, in which the procedure for determining the specified sleep period consists of a step in which the secondary counter is reduced in response to signals from the secondary clock until it reaches the specified value. 15. The procedure as specified in Claim 14, which consists of the following steps: - Reducing the power to the radiotelephone's idle circuits; - Measuring the new time of the radiotelephone's time generator; - In response to the new time, initiating the primary counter; - Measuring the first time of the secondary clock; and - Stopping the primary clock and the radiotelephone's operating time using the secondary clock. 16. The procedure as specified in Claim 15, which includes the following steps: - Restarting the time generator after the calibration period; - Powering up all necessary radio-telephone circuits; and - Restarting communication with a remote base station.