Ultra-Wideband Mode Selection

• US 20080182574A1
• Filed: 03/21/2007
• Published: 07/31/2008
• Est. Priority Date: 01/25/2007
• Status: Abandoned Application

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Haartsen, Jacobus Cornelis
• Application Number:
  US11/689,376
• Publication Number:
  US 20080182574A1
• Time in Patent Office: Days
• US Class Current: 455/113
• CPC Class Codes: H04B 1/71635 Transmitter aspects H04B1/7174 takes precedence
• CPC Class Codes: H04B 1/719 Interference-related aspects
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0058 Allocation criteria
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path

Abstract

A device that uses Ultra-Wideband modulation techniques is operated in a low duty cycle mode in which an amount of time during which the device is permitted to transmit a signal is limited. In response to ascertaining that a high-throughput service is to be performed, the device operates in a detect and avoid mode in which it is permitted to transmit continuously on a selected frequency band at a maximum output power until a victim service is detected operating on the selected frequency band. In response to a victim service being detected, the device is again operated in the low duty cycle mode while attempting to identify another frequency band in which to operate the device in the detect and avoid mode. Measures can be taken to maintain a comparable QoS in LDC mode while the device searches for a new DAA mode frequency band.

Claims

1. A method of operating a device that uses Ultra-Wideband modulation techniques, the method comprising:

operating the device in a low duty cycle mode in which an amount of time during which the device is permitted to transmit a signal is limited;

ascertaining that a high-throughput service is to be performed; and

in response to ascertaining that the high-throughput service is to be performed, operating the device in a detect and avoid mode in which the device is permitted to transmit continuously on a selected frequency band at a maximum output power until a victim service is detected operating on the selected frequency band.

2. The method of claim 1, comprising:

in response to the victim service being detected operating on the selected frequency band, again operating the device in the low duty cycle mode while attempting to identify another frequency band in which to operate the device in the detect and avoid mode.

3. The method of claim 2, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by using a slower data exchange rate.

4. The method of claim 2, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an amount of data compression.

5. The method of claim 2, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an order of modulation.

6. The method of claim 2, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by rearranging a resource allocation among a plurality of other devices with which the device is communicating.

7. The method of claim 6, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises allocating most of a channel capacity to services having quality of service requirements.

8. The method of claim 6, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises suspending best effort services.

9. The method of claim 1, comprising:

in response to the victim service being detected operating on the selected frequency band, attempting for a limited time to identify another frequency band in which to operate the device in the detect and avoid mode while continuing to operate the device in the detect and avoid mode on the selected frequency band.

10. The method of claim 9, comprising:

in response to expiration of the limited time without another frequency band being identified, again operating the device in the low duty cycle mode.

11. The method of claim 10, wherein again operating the device in the low duty cycle mode comprises again attempting to identify another frequency band in which to operate the device in the detect and avoid mode.

12. The method of claim 10, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by using a slower data exchange rate.

13. The method of claim 10, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an amount of data compression.

14. The method of claim 10, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an order of modulation.

15. The method of claim 10, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by rearranging a resource allocation among a plurality of other devices with which the device is communicating.

16. The method of claim 15, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises allocating most of a channel capacity to services having quality of service requirements.

17. The method of claim 15, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises suspending best effort services.

18. The method of claim 1, comprising:

in response to detecting that the high-throughput service has terminated, again operating the device in the low duty cycle mode.

19. An apparatus for controlling operation of a device that uses Ultra-Wideband modulation techniques, the apparatus comprising:

logic configured to operate the device in a low duty cycle mode in which an amount of time during which the device is permitted to transmit a signal is limited;

logic configured to ascertain that a high-throughput service is to be performed; and

logic configured to respond to ascertaining that the high-throughput service is to be performed by operating the device in a detect and avoid mode in which the device is permitted to transmit continuously on a selected frequency band at a maximum output power until a victim service is detected operating on the selected frequency band.

20. The apparatus of claim 19, comprising:

logic configured to respond to the victim service being detected operating on the selected frequency band by again operating the device in the low duty cycle mode while attempting to identify another frequency band in which to operate the device in the detect and avoid mode.

21. The apparatus of claim 20, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by using a slower data exchange rate.

22. The apparatus of claim 20, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an amount of data compression.

23. The apparatus of claim 20, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an order of modulation.

24. The apparatus of claim 20, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by rearranging a resource allocation among a plurality of other devices with which the device is communicating.

25. The apparatus of claim 24, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises allocating most of a channel capacity to services having quality of service requirements.

26. The apparatus of claim 24, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises suspending best effort services.

27. The apparatus of claim 19, comprising:

logic configured to respond to the victim service being detected operating on the selected frequency band by attempting for a limited time to identify another frequency band in which to operate the device in the detect and avoid mode while continuing to operate the device in the detect and avoid mode on the selected frequency band.

28. The apparatus of claim 27, comprising:

logic configured to respond to expiration of the limited time without another frequency band being identified by again operating the device in the low duty cycle mode.

29. The apparatus of claim 28, wherein again operating the device in the low duty cycle mode comprises again attempting to identify another frequency band in which to operate the device in the detect and avoid mode.

30. The apparatus of claim 28, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by using a slower data exchange rate.

31. The apparatus of claim 28, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an amount of data compression.

32. The apparatus of claim 28, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by increasing an order of modulation.

33. The apparatus of claim 28, wherein again operating the device in low duty cycle mode comprises maintaining a comparable quality of service experience to a user by rearranging a resource allocation among a plurality of other devices with which the device is communicating.

34. The apparatus of claim 33, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises allocating most of a channel capacity to services having quality of service requirements.

35. The apparatus of claim 33, wherein rearranging the resource allocation among the plurality of other devices with which the device is communicating comprises suspending best effort services.

36. The apparatus of claim 19, comprising:

logic configured to respond to detecting that the high-throughput service has terminated by again operating the device in the low duty cycle mode.

37. An Ultra-Wideband (UWB) device that utilizes UWB modulation techniques, the UWB device comprising:

transmission logic configured to generate a signal to be transmitted from an antenna, wherein;

the transmission logic is capable of operating in either a low duty cycle mode or a detect and avoid mode;

in the low duty cycle mode an amount of time during which the UWB device is permitted to transmit a signal is limited; and

in the detect and avoid mode the UWB device is permitted to transmit continuously on a selected frequency band at a maximum output power until a victim service is detected operating on the selected frequency band;

receive logic configured to supply a received signal derived from a signal supplied by the antenna, wherein the receive logic is capable of operating in either the low duty cycle mode or the detect and avoid mode;

logic configured to cause the transmission logic and the receive logic to operate in the low duty cycle mode;

logic configured to ascertain that a high-throughput service is to be performed; and

logic configured to respond to ascertaining that the high-throughput service is to be performed by causing the transmission logic and the receive logic to operate in the detect and avoid mode.

38. The UWB device of claim 37, comprising:

logic configured to respond to the victim service being detected operating on the selected frequency band by again causing the transmission logic and the receive logic to operate in the low duty cycle mode while attempting to identify another frequency band in which to operate the transmission logic and the receive logic in the detect and avoid mode.

39. The UWB device of claim 37, comprising:

logic configured to respond to the victim service being detected operating on the selected frequency band by attempting for a limited time to identify another frequency band in which to operate the transmission logic and the receive logic in the detect and avoid mode while continuing to operate the transmission logic and the receive logic in the detect and avoid mode on the selected frequency band.

40. The UWB device of claim 37, comprising:

logic configured to respond to detecting that the high-throughput service has terminated by again operating the transmission logic and the receive logic in the low duty cycle mode.

41. The UWB device of claim 37, wherein the UWB device is a sensor that wirelessly communicates sensor data.

42. The UWB device of claim 37, wherein the UWB device is mobile user equipment.