Increasing the stand-by time of wireless devices

A wireless device, comprising:

• a sleep deactivator that periodically activates a wireless user equipment from a sleep mode at a wake-up time in advance of a time slot during which a periodic message that is expected to be received;
• a receiver configured to receive and sample a transmitter signal that includes the periodic message;
• a sample selector unit configured to delay the sampled received signal at a plurality of delays and form a corresponding plurality of delayed sampled received signals;
• an extractive element, coupled to the sleep deactivator, that extracts the periodic message in at least one of a plurality of intervals of the time slot;
• a hypothesis testing unit, coupled to the extractive element, that is configured to assess a quality of the periodic message at at least one of the plurality of intervals and assign a quality score for each one of the plurality of intervals at which an assessment is made;
• and
• a controller of the delayed sampled received signal configured to determine a message timing corresponding to one of the quality scores.

A wireless device, comprising:

• a sleep deactivator that periodically activates a wireless user equipment from a sleep mode at a wake-up time in advance of a time slot during which a paging indicator that is expected to be received;
• a receiver that is configured to sample a transmitter signal that includes the paging indicator;
• a sample selector unit that is configured to distribute offset groups of samples of the received indicator to a hypothesis testing unit;
• an extractive element, coupled to the sleep deactivator, that extracts the paging indicator in at least one of a plurality of intervals of the time slot;
• the hypothesis testing unit, coupled to the extractive element, that is configured to assess a quality of the paging indicator at at least one of the plurality of intervals and assign a present score for each one of the plurality of intervals at which an assessment is made;
• and
• a controller that is configured to determine a message timing corresponding to one of the present scores and determine a next message timing based on the present message timing.

A method of determining periodic message timing in a wireless device, comprising:

• activating periodically the wireless device from a sleep mode at a wake-up time in advance of a time slot during which a periodic signal that is expected to be received;
• sampling a received transmitter signal that includes the periodic signal that is transmitted in predetermined slots of time and has plural frequency components;
• generating offset groups of received signal samples;
• extracting the periodic signal in at least one of a plurality of intervals of the time slot;
• demodulating the offset groups of received signal samples;
• assessing a quality of the periodic signal at at least one of the plurality of intervals and assign a score for each one of the plurality of intervals at which an assessment is made;
• scoring selected offset groups based on a predetermined criterion;
• and
• selecting a message timing corresponding to a score of the selected offset groups.