Techniques to improve co-existence among multiple radios

• US 20100027525A1
• Filed: 07/30/2008
• Published: 02/04/2010
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Intel Corporation
• Inventors: Zhu, Jing
• Granted Patent: US 8,121,068 B2
• Time in Patent Office: Days
• US Class Current: 370/350
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Techniques are described that can be used to permit coexistence of different radios. Preambles of frames from a first radio are detected. If the preambles occur within a prescribed period of one another, then a frame synchronization signal is transmitted. Based on the timing of the frame synchronization signal, a second radio adjusts the timing of transmit and receive time slots.

Claims

1. A method comprising:

requesting no transmission by a first radio during a first time region; and

selectively adjusting a time slot of a second radio frame based on preambles of frames from a third radio.

2. The method of claim 1, wherein the first radio comprises a WLAN transceiver, the second radio comprises a WPAN transceiver, and the third radio comprises a WWAN transceiver.

3. The method of claim 1, wherein the requesting no transmission comprises permitting transmission of second and third radios during the first time region.

4. The method of claim 1, further comprising:

requesting no transmission by the third radio during a second time region and

permitting transmission by the first radio during the second time region.

5. The method of claim 1, wherein the selectively adjusting a time slot of a second radio frame comprises:

detecting a frame boundary of a frame from the third radio.

6. The method of claim 5, wherein the detecting a frame boundary comprises:

detecting N preambles, where the period between the N preambles equals a period of the third radio frame.

7. The method of claim 6, wherein N is 2.

8. The method of claim 1, wherein selectively adjusting a time slot of a second radio frame comprises:

generating a frame synchronization signal and

aligning a time slot of the second radio frame with a portion of the frame synchronization signal.

9. The method of claim 8, wherein the generating a frame synchronization signal comprises determining offset and period parameters of the frame synchronization signal.

10. An apparatus comprising:

a first radio;

a second radio;

a third radio; and

control logic to;

request no transmission by the second third radio during a first time region and

selectively adjust time slots allocated by the third radio based on preambles of frames received by the first radio.

11. The apparatus of claim 10, wherein the first radio comprises a WWAN radio, the second radio comprises a WLAN radio, and the third radio comprises a WPAN radio.

12. The apparatus of claim 10, wherein to request no transmission is to permit transmission by the first and third radios during the first time region.

13. The apparatus of claim 10, wherein the control logic to selectively adjust is to detect a frame boundary of a frame of the first radio.

14. The apparatus of claim 13, wherein the control logic to detect a frame boundary is to detect N preambles, where the period between the N preambles equals a period of the frame of the first radio.

15. The apparatus of claim 14, wherein N is 2.

16. The apparatus of claim 10, wherein the control logic to selectively adjust time slots allocated by the third radio is to:

generate a frame synchronization signal and

align at least one of the time slots with a portion of the frame synchronization signal.

17. The apparatus of claim 16, wherein the control logic to generate a frame synchronization signal is to determine offset and period parameters of the frame synchronization signal.

18. A system comprising:

a first radio;

a second radio;

a third radio;

at least one antenna communicatively coupled to one of the first, second, and third radios; and

control logic to;

request no transmission by the second third radio during a first time region and

selectively adjust time slots allocated by the third radio based on preambles of frames received by the first radio.

19. The system of claim 18, wherein the control logic to selectively adjust is to detect N preambles, where a period between the N preambles equals a period of the first radio frame.

20. The system of claim 19, wherein N is 2.

21. The system of claim 18, wherein the control logic to selectively adjust time slots is to:

generate a frame synchronization signal and

align at least one of the time slots with a portion of the frame synchronization signal.

22. The system of claim 21, wherein the control logic to generate a frame synchronization signal is to determine offset and period parameters of the frame synchronization signal.