Radio operational configurations
An electronic device may include wireless circuitry having one or more radios and one or more antennas. For some device configurations such as during a device low-power mode, a radio (operating in a radio on-off mode) may alternate between on and off states based on a duty cycle to reduce power consumption and increase device battery life. Radio operation in the on-off mode and device operation in the low-power mode may accommodate other radio operations such as emergency broadcast message reception, radio operations under an allocated power budget, user equipment periodic registration and update operations.
1 . A method of operating user equipment having wireless circuitry comprising:
operating a radio of the wireless circuitry in a radio-on state based on a duty cycle;
receiving, by the radio, an emergency broadcast message while the radio is operating in the radio-on state; and
operating the radio in an emergency broadcast message mode during which the radio receives one or more additional emergency broadcast messages beyond a time period defined by the duty cycle in response to receiving the emergency broadcast message by setting a duplication detection timer and by restarting the duplicate detection timer when the one or more additional emergency broadcast messages include at least one message that is not a duplicate of the emergency broadcast message.
2 . The method of claim 1 , wherein operating the radio in the emergency broadcast message mode comprises switching, at an expiry of the duplication detection timer, the radio to a radio-off state.
3 . The method of claim 1 further comprising:
receiving user input before operating the radio beyond the time period defined by the duty cycle.
4 . The method of claim 1 further comprising:
setting a guard timer after receiving the emergency broadcast message; and
at an expiry of the guard timer, switching the radio to a radio-off state.
5 . The method of claim 1 , wherein operating the radio in the radio-on state based on the duty cycle comprises operating the radio in the radio-on state for a first duration and operating the radio in a radio-off state for a second duration, a ratio between the first duration and the second duration being indicative of the duty cycle.
6 . The method of claim 1 , wherein the emergency broadcast message is a Commercial Mobile Alert System broadcast message.
7 . The method of claim 1 , wherein the duty cycle is associated with the user equipment operating in a low-power mode.
8 . The method of claim 7 , wherein the emergency broadcast message is a location-based emergency broadcast message, the method further comprising:
storing the location-based emergency broadcast message; and
conveying the location-based emergency broadcast message to a user when a location-based condition is satisfied and while the user equipment is operating in the low-power mode.
9 . A method of operating user equipment having a radio comprising:
operating the radio in a radio-on state during a first time period based on a power consumption threshold;
operating the radio in the radio-on state during a second time period based on the power consumption threshold;
operating the radio in a radio-off state during a third time period between the first time period and the second time period; and
in response to reaching the power consumption threshold while operating the radio in the radio-on state during the first time period, switching to operating the radio in the radio-off state during the third time period.
10 . The method of claim 9 , wherein operating the radio in the radio-on state during the first time period comprises performing one or more intermittent cell search operations.
11 . The method of claim 10 , wherein operating the radio in the radio-on state during the first time period comprises performing a data transfer operation after the one or more intermittent cell search operations.
12 . The method of claim 11 , wherein a duration of the data transfer operation is determined based on the power consumption threshold.
13 . A method of operating user equipment having wireless circuitry comprising:
receiving user input that informs radio operations;
after receiving the user input, operating, based on the received user input, a radio of the wireless circuitry in a radio-on state based on a duty cycle;
receiving, by the radio, an emergency broadcast message when the radio is operating in the radio-on state; and
operating the radio beyond a time period defined by the duty cycle in response to receiving the emergency broadcast message.
14 . The method of claim 13 , wherein the radio is operated beyond the time period defined by the duty cycle based on the received user input.
15 . The method of claim 13 , wherein the emergency broadcast message is a location-based emergency broadcast message.
16 . The method of claim 13 , wherein the emergency broadcast message is a Commercial Mobile Alert System broadcast message.
17 . The method of claim 13 , wherein operating the radio in the radio-on state based on the duty cycle is associated with the user equipment operating in a low-power mode.
18 . The method of claim 1 , further comprising:
setting a guard timer after receiving the emergency broadcast message, the guard timer having a longer duration than the duplicate detection timer; and
at the expiry of the guard timer, switching the radio to a radio-off state.