Method for reducing interferences

• US 20090180406A1
• Filed: 04/27/2007
• Published: 07/16/2009
• Est. Priority Date: 05/26/2006
• Status: Abandoned Application

• Current Assignee: Nokia Siemens Networks GmbH & Company KG (Nokia Corporation)
• Original Assignee: Nokia Siemens Networks GmbH & Company KG (Nokia Corporation)
• Inventors: Breuer, Volker, Färber, Michael
• Application Number:
  US12/227,771
• Publication Number:
  US 20090180406A1
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04B 7/2621 using frequency division multiple access [FDMA] H04B7/2615 takes precedence
• CPC Class Codes: H04L 5/023 Multiplexing of multicarrier modulation signals multicarrier modulation H04L27/2601
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks

Abstract

Interference is reduced between two radio communication systems. A first radio communication system uses a first and a second frequency ranges which are separated by a duplex gap. A second radio communication system uses a third radio frequency range which forms part of the duplex gap. The first and second radio communication systems exchange information in order to establish an a priori knowledge about a connection on the network side. The a priori knowledge includes the radio transmission resources of the first frequency range provided on the radio communication system side and of the second frequency range and the radio transmission resources of the third frequency range (FB3) desired for call setup and completion. Radio transmission resources are selected depending on the a priori knowledge at the second radio communication system in order to reduce interferences between the first and second radio communication systems.

Claims

1-12. -12. (canceled)

13. A method for reducing interference between two radio communication systems, comprising:

accessing radio transmission resources of a common frequency band for carrying out a radio transmission at a first radio communication system and a second radio communication system,

separating a first frequency range and a second frequency range by a duplex gap,

using allocated radio transmission resources of the first frequency range and of the second frequency range at the first radio communication system,

forming a part of the duplex gap with a third frequency range,

using allocated radio transmission resources of the third frequency range at the second radio communication system,

exchanging information for forming a priori knowledge about a connection at a network end at the first radio communication system and the second radio communication system,

comprising the a priori knowledge of at least the radio transmission resources of the first frequency range and of the second frequency range provided by the first radio communication system and the radio transmission resources of the third frequency range required for establishing and carrying out a connection,

selecting radio transmission resources in dependence on the a priori knowledge for reducing interference between the first radio communication system and the second radio communication system, at least at the second radio communication system, and

transmitting subcarriers used in the third frequency range with a nonuniform transmitting power.

14. The method as claimed in claim 13, further comprising selecting the radio transmission resources in dependence on the a priori knowledge for reducing interference additionally at the first radio communication system.

15. The method as claimed in claim 13, further comprising controlling the transmitting power of the allocated radio transmission resources in dependence on the a priori knowledge.

16. The method as claimed claim 13, further comprising exchanging information via a common node or via a common network management unit in order to form the a priori knowledge at the first radio communication system and the second radio communication system.

17. The method as claimed in claim 13, further comprising using an OFDMA radio communication system as the first radio communication system or as the second radio communication system.

18. The method as claimed in claim 16, further comprising using a radio network controller “

RNC”

as common network management unit.

19. The method as claimed in claim 16, further comprising using a central control unit within a multistandard base station as the common network management unit.

20. The method as claimed claim 13, further comprising:

using a radio communication system with an FDD radio transmission as the first radio communication system, or

using a radio communication system with a TDD radio transmission as the second radio communication system.

21. The method as claimed in claim 20,

using a 3GPP LTE radio communication system as the first radio communication system, or

using a WiMax radio communication system as the second radio communication system.

22. The method as claimed in claim 13, further comprising:

using the first frequency range for an FDD radio transmission in the uplink direction; and

using the second frequency range for an FDD radio transmission in the downlink direction.

23. The method as claimed in claim 13, further comprising using the third frequency range for an FDD radio transmission or for a TDD radio transmission in the downlink direction.

24. The method as claimed in claim 13, further comprising using remaining radio transmission resources between the first frequency range and the third frequency range or between the second frequency range and the third frequency range as a guard band.

25. The method as claimed in claim 14, further comprising controlling the transmitting power of the allocated radio transmission resources in dependence on the a priori knowledge.

26. The method as claimed claim 25, further comprising exchanging information via a common node or via a common network management unit in order to form the a priori knowledge at the first radio communication system and the second radio communication system.

27. The method as claimed in claim 26, further comprising using an OFDMA radio communication system as the first radio communication system or as the second radio communication system.

28. The method as claimed in claim 27, further comprising using a radio network controller “

RNC”

as common network management unit.

29. The method as claimed in claim 27, further comprising using a central control unit within a multistandard base station as the common network management unit.

30. The method as claimed claim 28, further comprising:

using a radio communication system with an FDD radio transmission as the first radio communication system, or

using a radio communication system with a TDD radio transmission as the second radio communication system.

31. The method as claimed in claim 30,

using a 3GPP LTE radio communication system as the first radio communication system, or

using a WiMax radio communication system as the second radio communication system.

32. The method as claimed in claim 31, further comprising:

using the first frequency range for an FDD radio transmission in the uplink direction; and

using the second frequency range for an FDD radio transmission in the downlink direction.

33. The method as claimed in claim 32, further comprising using the third frequency range for an FDD radio transmission or for a TDD radio transmission in the downlink direction.

34. The method as claimed in claim 33, further comprising using remaining radio transmission resources between the first frequency range and the third frequency range or between the second frequency range and the third frequency range as a guard band.

35. The method as claimed claim 29, further comprising:

using a radio communication system with an FDD radio transmission as the first radio communication system, or

using a radio communication system with a TDD radio transmission as the second radio communication system.

36. The method as claimed in claim 35,

using a 3GPP LTE radio communication system as the first radio communication system, or

using a WiMax radio communication system as the second radio communication system.

37. The method as claimed in claim 36, further comprising:

using the first frequency range for an FDD radio transmission in the uplink direction; and

using the second frequency range for an FDD radio transmission in the downlink direction.

38. The method as claimed in claim 37, further comprising using the third frequency range for an FDD radio transmission or for a TDD radio transmission in the downlink direction.

39. The method as claimed in claim 38, further comprising using remaining radio transmission resources between the first frequency range and the third frequency range or between the second frequency range and the third frequency range as a guard band.