WAKE-UP RADIO SYSTEM

• US 20100112950A1
• Filed: 11/12/2009
• Published: 05/06/2010
• Est. Priority Date: 12/11/2007
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Ericsson Mobile Communications AB (Sony Group Corp.)
• Inventors: Weinans, Geert Henrik, Haartsen, Jacobus Cornelis
• Granted Patent: US 8,712,483 B2
• Time in Patent Office: Days
• US Class Current: 455/41.300
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: H04B 5/77 for interrogation
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 84/20 Master-slave selection or change arrangements
• CPC Class Codes: Y02D 30/70 in wireless communication networks

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.

Claims

1. 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.

2. The radio system of claim 1, wherein the sniff sub-rating allows the slave and master to establish a latency period of about 1.28 s.

3. The radio system of claim 1, wherein a first latency period (T_sniff) from the slave to the master is greater than a second latency period (T_subrate) from the master to the slave.

4. The radio system of claim 1, wherein the master is configured to wake up the slave via the wake-up radio receiver so that at a next sniff period the slave wakes up and communicates with the master.

5. The radio system of claim 1, wherein a first latency period (T_sniff) from the slave to the master is N times greater than a second latency period (T_subrate) from the master to the slave, wherein N is an integer.

6. The radio system of claim 1, further comprising the master, the master comprising a master short-range transmitter to communicate with the short-range transmitter of the slave after the slave has been woken up via the wake up radio receiver.

7. The radio system of claim 1, wherein the master further comprises a wake-up transmitter to send the wake-up receiver a wake up message to alert the slave to respond at a next T_sniff latency period.

8. The radio system of claim 1, wherein the master comprises a mobile telecommunications device.

9. The radio system of claim 1, wherein the slave comprises a Bluetooth accessory.

10. The radio system of claim 9, wherein the slave comprises one of a headset or a watch.

11. The radio system of claim 1, wherein the slave connects to the master over a Bluetooth network.

12. The radio system of claim 1, wherein the slave is configured to achieve a standby current of about 1 μ

A with a latency of about 1 s.

13. A mobile device comprising:

a wake-up transmitter to send a wake-up message to a slave device to wake-up the slave device; and

a short-range transmitter to communicate with the slave device once the slave device has been woken up,

wherein the slave device is configured to have a sniff sub-rating with a master device.

14. The radio system of claim 13, wherein the mobile device is configured to communicate with the slave device and to send the wake-up message to the slave device over a Bluetooth network.

15. The radio system of claim 13, wherein the wake up transmitter is a uni-directional radio device.

16. The radio system of claim 13, wherein the wake-up transmitter and the short-range transmitter comprise common hardware components to form a unitary transmitter.

17. A method of communicating a master device with a slave device over a short-range network, comprising:

establishing a sniff period from the master to the slave; and

applying a subrating by the slave, wherein the subrating is greater than the sniff period;

allowing the slave device to wake up during the subrating so that at the next sniff period the slave communicates with the master.

18. The method of claim 17, wherein the allowing the master device to wake up the slave device comprises allowing the master device via a wake-up transmitter to send a wake-up message to a wake-up receiver the slave device so that when the wake-up receiver receives the wake-up message, the slave device communicates with the master at a next sniff period.

19. The method of claim 17, wherein the allowing the slave device to wake up comprises allowing the master device to wake up the slave device during the subrating period so that at the next sniff period the slave communicates with the master.

20. The method of claim 17, wherein the allowing the slave device to be woken up comprises allowing the slave device to wake up during the subrating period so that at the next sniff period the slave communicates with the master.