Interoperability for bluetooth/IEEE 802.11

• US 7,046,649 B2
• Filed: 01/16/2001
• Issued: 05/16/2006
• Est. Priority Date: 01/20/2000
• Status: Expired due to Term

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Agere Systems Incorporated (Broadcom, Inc.)
• Inventors: Awater, Geert Arnout, Yan, Ran-Hong
• Primary Examiner(s): Lee, Andrew C.
• Assistant Examiner(s): Hyun, Soon D.
• Application Number:
  US09/761,074
• Publication Number:
  US 20010010689A1
• Time in Patent Office: 1,946 Days
• Field of Search: 370/277, 370/278, 370/280, 370/282, 370/294, 370/310, 370/339, 370/345, 370/349, 370/352, 370/389, 370/466, 370/468, 370/498, 370/478, 370/344, 370/347, 370/328, 370/338, 370/337, 370/465, 455/78, 455/83
• US Class Current: 370/338
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: H04W 88/10 adapted for operation in multiple networks, e.g. multi-mode access points

Abstract

The key of the invention is to introduce an interoperability device in a communication system which integrates an IEEE 802.11 transceiver and a Bluetooth transceiver. The device prevents that one transceiver is transmitting while the other is receiving, which would cause interference at the receiving transceiver. In addition, the device preferably prevents that both systems are transmitting at the same time to avoid interference at the receiving device(s). Optionally the device prohibits simultaneous reception of both transceivers. In that way the radio receiver can be shared between the devices, allowing a cheaper and smaller hardware design.

Claims

1. A communication device, comprising:

a first radio system operating at a first range of frequencies; and

a second radio system operating at a second range of frequencies;

a controller adapted to control said first radio system and said second radio system such that only one of said first radio system and said second radio system may transmit at any one time; and

a multiplexer adapted to time multiplex transmissions from said first radio system and said second radio system such that time slots are not assigned to receive from both said first radio system and said second radio system at a same time;

wherein at least a part of said first range of frequencies and said second range of frequencies overlap.

2. The communication device of claim 1, wherein:

said first radio system is a Bluetooth system and said second radio system is an IEEE 802.11 system.

3. The communication device of claim 1, wherein:

when said first radio system is transmitting said second radio system cannot receive or transmit.

4. The communication device of claim 3, wherein:

when said first radio system is receiving said second radio system cannot receive or transmit.

5. The communication device of claim 2, wherein said controller further comprises:

a switch adapted to switch on and off said first radio system and said second radio system.

6. The communication device of claim 2, wherein:

said controller comprises a multiplexer adapted to time multiplex transmissions from said Bluetooth system and said IEEE 802.11 system, said IEEE 802.11 and said Bluetooth transmissions being multiplexed into Bluetooth time-slots.

10. The communication device of claim 2, wherein:

said controller prevents transmission of IEEE 802.11 packets during a Bluetooth ACL packet transmission.

11. The communication device of claim 2, wherein:

said controller prevents transmission of Bluetooth ACL packets during an IEEE 802.11 packet transmission.

12. The communication device of claim 11, wherein:

said first radio system and said second radio system share a common physical layer.

7. A communication device, comprising:

a first radio system operating at a first range of frequencies, said first radio system being a Bluetooth system; and

a second radio system operating at a second range of frequencies, said second radio system being an IEEE 802.11 system;

a controller adapted to control said first radio system and said second radio system such that only one of said first radio system and said second radio system may transmit at any one time;

wherein at least a part of said first range of frequencies and said second range of frequencies overlap;

wherein said controller comprises a multiplexer adapted to time multiplex transmissions from said first radio system and said second radio system; and

wherein said Bluetooth transmissions are through a single HV2 SCO link connection, and said IEEE 802.11 transmissions being in two time-slots in every four.

8. A communication device, comprising:

a first radio system operating at a first range of frequencies, said first radio system being a Bluetooth system; and

a second radio system operating at a second range of frequencies, said second radio system being an IEEE 802.11 system;

a controller adapted to control said first radio system and said second radio system such that only one of said first radio system and said second radio system may transmit at any one time;

wherein at least a part of said first range of frequencies and said second range of frequencies overlap;

wherein said controller comprises a multiplexer adapted to time multiplex transmissions from said first radio system and said second radio system; and

wherein said Bluetooth transmissions are through a single HV3 SCO link connection, said IEEE 802.11 transmissions being in four time-slots in every six.

9. A communication device, wherein:

a first radio system operating at a first range of frequencies, said first radio system being a Bluetooth system; and

a second radio system operating at a second range of frequencies, said second radio system being an IEEE 802.11 system;

a controller adapted to control said first radio system and said second radio system such that only one of said first radio system and said second radio system may transmit at any one time;

wherein at least a part of said first range of frequencies and said second range of frequencies overlap;

wherein said controller comprises a multiplexer adapted to time multiplex transmissions from said first radio system and said second radio system; and

wherein said Bluetooth transmissions are through two HV3 SCO link connections, said IEEE 802.11 transmissions being in two time-slots in every six.

13. A method of communicating utilizing a first radio system and a second radio system, comprising:

incorporating a first radio system operating at a first range of frequencies and a second radio system operating at a second range of frequencies into a single device;

overlapping at least a part of said first range of frequencies and said second range of frequencies;

time multiplexing transmissions from said first radio system and said second radio system such that time slots are not assigned to receive from both said first radio system and said second radio system at a same time;

controlling said first radio system and said second radio system with only one of said first radio system and said second radio system transmitting at any one time.

14. The method of claim 13, wherein:

said first radio system is a Bluetooth system and said second radio system is an IEEE 802.11 system.

15. The method of claim 13, further comprising:

controlling said first radio system and said second radio system such that when one radio system is transmitting a remaining radio system cannot receive or transmit.

16. The method of claim 15, further comprising:

controlling said first radio systems and said second radio system such that when one radio system is receiving a remaining radio system cannot receive or transmit.

17. The method of claim 14, wherein:

said first radio systems and said second radio system are controlled by switching on and off said first radio system and said second radio system.

21. The method of claim 14, further comprising:

preventing transmission of IEEE 802.11 packets during a Bluetooth ACL packet transmission.

22. The method of claim 14, further comprising:

preventing transmission of Bluetooth ACL packets during an IEEE 802.11 packet transmission.

23. The method of claim 22, wherein:

said first radio system and said second radio systems share a common physical layer.

18. A method of communicating utilizing a first radio system and a second radio system, comprising:

incorporating a first radio system operating at a first range of frequencies and a second radio system operating at a second range of frequencies into a single device;

overlapping at least a part of said first range of frequencies and said second range of frequencies; and

controlling said first radio system and said second radio system such that only one of said first radio system and said second radio system transmits at any one time;

wherein said Bluetooth transmissions are through a single HV2 SCO link connection, said IEEE 802.11 transmissions being in two time-slots in every four.

19. A method of communicating utilizing a first radio system and a second radio system, comprising:

incorporating a first radio system operating at a first range of frequencies and a second radio system operating at a second range of frequencies into a single device;

overlapping at least a part of said first range of frequencies and said second range of frequencies; and

controlling said first radio system and said second radio system such that only one of said first radio system and said second radio system transmits at any one time;

wherein said Bluetooth transmissions are through a single HV3 SCO link connection, said IEEE 802.11 transmissions being in four time-slots in every six.

20. A method of communicating utilizing a first radio system and a second radio system, comprising:

incorporating a first radio system operating at a first range of frequencies and a second radio system operating at a second range of frequencies into a single device;

overlapping at least a part of said first range of frequencies and said second range of frequencies; and

controlling said first radio system and said second radio system such that only one of said first radio system and said second radio system transmits at any one time;

wherein said Bluetooth transmissions are through two HV3 SCO link connections, said IEEE 802.11 transmissions being in two time-slots in every six.

24. A communication apparatus, comprising:

means for incorporating a first radio system operating at a first range of frequencies and a second radio system operating at a second range of frequencies into a single device;

means for overlapping at least a part of said first range of frequencies and at least a part of said second range of frequencies;

means for time multiplexing transmissions from said first radio system and said second radio system such that time slots are not assigned to receive from both said first radio system and said second radio system at a same time; and

means for controlling said first radio system and said second radio system such that only one of said first radio system and said second radio system transmits at any one time.

25. The apparatus of claim 24, wherein:

said first radio system is a Bluetooth system and said second radio system is an IEEE 802.11 system.

26. The apparatus of claim 24, further comprising:

means for controlling said first radio systems and said second radio system such that when one radio system is transmitting a remaining radio system cannot receive or transmit.

27. The method apparatus of claim 26, further comprising:

means for controlling said first radio systems and said second radio system such that when one radio system is receiving a remaining radio system cannot receive or transmit.

28. The apparatus of claim 24, wherein:

said first radio systems and said second radio system are controlled by switching on and off said first radio system and second radio system.

29. A communication device, comprising:

a first radio system operating at a first range of frequencies;

a second radio system operating at a second range of frequencies overlapping at least in part with said first range of frequencies; and

a controller adapted to slot-steal from a protocol associated with said first radio system to schedule wireless asynchronous data associated with said second radio between periodic transmissions or receptions of wireless data associated with said first radio system;

wherein said scheduling assures that said first radio system does not transmit at a time that said second radio system is receiving, and that no time slot is assigned to receive such that time slots are not assigned to receive from both said first radio system and said second radio system at a same time.

30. A communication device according to claim 29, wherein:

said schedule is software programmable.

31. The communication device according to claim 29, wherein:

said first radio system is a Bluetooth system and said second radio system is an IEEE 802.11 system.

32. The communication device according to claim 29, wherein:

when said first radio system is transmitting, said second radio system is prevented from receiving and transmitting.

33. The communication device according to claim 31, wherein said controller comprises:

a multiplexer adapted to time multiplex transmissions from said Bluetooth system and said IEEE 802.11 system, said IEEE 802.11 and said Bluetooth transmissions being multiplexed into Bluetooth time-slots.

34. The communication device according to claim 31, wherein:

said controller prevents transmission of an IEEE 802.11 packet during transmission of a Bluetooth ACL packet.

35. The communication device according to claim 31, wherein:

said controller prevents transmission of a Bluetooth ACL packet during transmission of an IEEE 802.11 packet.

36. The communication device according to claim 29, wherein:

said first radio system and said second radio system share a common physical layer.

37. Apparatus for avoiding interference in a dual-radio communication device, comprising:

means for operating a first radio system at a first range of frequencies;

means for operating a second radio system at a second range of frequencies overlapping at least in part with said first range of frequencies; and

means for slot-stealing from a protocol associated with said first radio system to schedule wireless asynchronous data associated with said second radio system between periodic transmissions or receptions of wireless data associated with said first radio system;

wherein said scheduling assures that said first radio system is prevented from transmitting at a time that said second radio system is receiving, and that no time slot is assigned to receive such that time slots are not assigned to receive from both said first radio system and said second radio system at a same time.

38. The apparatus for avoiding interference in a dual-radio communication device according to claim 37, wherein:

said schedule is software programmable.

39. The apparatus for avoiding interference in a dual-radio communication device according to claim 37, wherein:

said first radio system is a Bluetooth system and said second radio system is an IEEE 802.11 system.

40. The apparatus for avoiding interference in a dual-radio communication device according to claim 37, further comprising:

means for preventing said second radio system from receiving and transmitting when said first radio system is transmitting.

41. The apparatus for avoiding interference in a dual-radio communication device according to claim 39, wherein said means for scheduling comprises:

multiplexing means for time multiplexing transmissions from said Bluetooth system and said IEEE 802.11 system, said IEEE 802.11 and said Bluetooth transmissions being multiplexed into Bluetooth time-slots.

42. The apparatus for avoiding interference in a dual-radio communication device according to claim 39, wherein:

said means for scheduling prevents transmission of an IEEE 802.11 packet during transmission of a Bluetooth ACL packet.

43. The apparatus for avoiding interference in a dual-radio communication device according to claim 39, wherein:

said means for scheduling prevents transmission of a Bluetooth ACL packet during transmission of an IEEE 802.11 packet.

44. The apparatus for avoiding interference in a dual-radio communication device according to claim 37, wherein:

said first radio system and said second radio system share a common physical layer.