Wake-up radio system
AssigneesSony Corporation, Sony Mobile Communications Inc.
InventorsJacobus Cornelis Haartsen, Geert Henrik Weinans
Life of this patent
Estimating the term…
Abstract
Systems and methods may include a master device. The master device may include a wake-up transmitter to send a wake-up message to a slave device to wake-up the slave device. The master device may also include a short-range transmitter to communicate with the slave device once the slave device has been woken up. The master device may be a mobile phone that communicates with the slave device (e.g., Bluetooth accessory devices) over a Bluetooth network.
Claims20
A radio system comprising:
- a slave comprising a short-range transmitter and a wake-up radio receiver,
- wherein the slave is configured to have a sniff sub-rating with a master, the master being configured to wake up the slave via the wake-up radio receiver, wherein the master and slave define a sniff period (Tsniff) comprising a period between successive sniff event times, wherein the slave is scheduled to wake-up once every predetermined number of sniff periods, the predetermined number being greater than one;
- wherein when the master initiates communication with the slave prior to the slave's scheduled wake-up time by transmitting a wakeup message to the slave, a latency associated with the slave's response to the wakeup message does not exceed the sniff period (Tsniff), and
- wherein when the slave initiates communication with the master prior to the slave's scheduled wake-up time, a latency associated with the slave's communication with the master does not exceed the sniff period (Tsniff).
A mobile device comprising:
- a wake-up transmitter to initiate communication with slave device by sending a wake-up message to the slave device to wake-up the slave device prior to the slave device's scheduled wake-up time such that the slave device responds to the mobile device during the next sniff interval, wherein the slave device has a sniff sub-rating with the mobile device such that the slave device is scheduled to wake-up once every predetermined number of sniff intervals, the predetermined number being greater than one, wherein when the slave device initiates communication with the master prior to the slave device's scheduled wake-up time, the slave device communicates with the master during the next sniff interval;
- and
- a short-range transmitter to communicate with the slave device during the next sniff interval once the slave device has been woken up.
A method of establishing communication between a master device and a slave device over a short-range network, the method comprising:
- establishing a sniff period between the master device and the slave device;
- and
- establishing a subrating period between the master device and the slave device, wherein the subrating period is greater than the sniff period, the slave device being scheduled to wake-up once every subrating period;
- wherein when the master device initiates communication with the slave device by sending a wakeup message to the slave device causing the slave device to wake up prior to the slave device's scheduled wake-up time, the slave device communicates with the master device during the next sniff period, and
- wherein when the slave device initiates communication with the master device prior to the slave's scheduled wake-up time, the slave device communicates with the master device during the next sniff period.
Dependencies are inferred from the claim text.