SYSTEM AND METHOD FOR PROVIDING INTERFERENCE CHARACTERISTICS FOR INTERFERENCE MITIGATION

• US 20150098410A1
• Filed: 09/18/2014
• Published: 04/09/2015
• Est. Priority Date: 09/19/2013
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Jngren, George, Lincoln, Bo, Sesia, Stefania
• Granted Patent: US 9,451,625 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0027 Scheduling of signalling, e.g. occurrence thereof
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 1/1861 Physical mapping arrangements for ACK signaling see also H04L5/0053
• CPC Class Codes: H04L 27/00 Modulated-carrier systems
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

According to certain embodiments, methods and systems include providing interference characterization data by a network node to a first wireless device for use in performing interference mitigation. A network node may provide telecommunications services for a first wireless device located associated with the network node. Characteristic data associated with at least one characteristic of an interfering signal associated with a second wireless device may be identified. The at least one characteristic may identify at least one transmission mode associated with the interfering signal. The characteristic data associated with the interfering signal associated with the second wireless device may be transmitted to the first wireless device.

Claims

1. A method for providing interference characterization data by a network node for interference mitigation, comprising:

providing, by the network node, telecommunications services for a first wireless device located associated with the network node;

identifying, by the network node, characteristic data associated with at least one characteristic of an interfering signal associated with a second wireless device; and

transmitting, to the first wireless device, the characteristic data associated with the interfering signal associated with the second wireless device, and

wherein the at least one characteristic identifies at least one transmission mode associated with the interfering signal.

2. The method of claim 1, wherein the at least one characteristic data is associated with a neighboring cell associated with the interfering signal.

3. The method of claim 1, wherein the at least one characteristic identifies that the interfering signal is CRS based or DMRS based.

4. The method of claim 1, wherein the at least one characteristic comprises a DMRS pattern comprising a virtual cell identifier associated with the interfering signal.

5. The method of claim 1, wherein the at least one characteristic identifies a number of antenna ports in addition to the transmission mode.

6. The method of claim 1, wherein the at least one characteristic identifies a plurality of transmission modes that may be associated with the interfering signal.

7. The method of claim 1, wherein the at least one characteristic identifies a plurality of transmission modes that may not be associated with the interfering signal.

8. The method of claim 1, wherein the at least one characteristic identifies that the at least one transmission mode may not be used in a plurality of neighboring cells.

9. The method of claim 1, further comprising transmitting characteristic data in a plurality of messages.

10. The method of claim 1, wherein the at least one characteristic is tied to a cell identifier.

11. The method of claim 10, wherein the at least one characteristic comprises a plurality of characteristics associated with a plurality of interference signals tied to the cell identifier of a neighboring cell coverage area.

12. The method of claim 10, wherein the cell identifier is associated with a cell coverage area associated with the network node.

13. The method of claim 1, wherein the characteristic data is transmitted to the first wireless device in a dedicated signal addressed to the first wireless device.

14. The method of claim 1, wherein the at least one characteristic applies to a plurality of interfering signals received by the first wireless device.

15. The method of claim 1, wherein the at least one characteristic is transmitted using a higher layer signaling selected from the group consisting of RRC and MAC.

16. The method of claim 1, wherein the at least one characteristic is transmitted using a downlink control channel selected from the group consisting of PDCCH and ePDCCH.

30. The network node of claim 1, wherein the at least one characteristic applies to a plurality of interfering signals received by the first wireless device.

31. The network node of claim 1, wherein the at least one characteristic is transmitted using a higher layer signaling selected from the group consisting of RRC and MAC.

32. The network node of claim 1, wherein the at least one characteristic is transmitted using a downlink control channel selected from the group consisting of PDCCH and ePDCCH.

17. A network node for providing interference characterization data, the network node comprising:

memory containing executable instructions; and

one or more processors in communication with the memory, the one or more processors operable to execute the instructions to cause the network node to;

provide telecommunications services for a first wireless device associated with the network node;

identify characteristic data associated with at least one characteristic of an interfering signal associated with a second wireless device; and

transmit, to the first wireless device, the characteristic data associated with the interfering signal associated with the second wireless device, and

wherein the at least one characteristic is identifies at least one transmission mode associated with the interfering signal.

18. The network node of claim 17, wherein the at least characteristic data is associated with a neighboring cell associated with the interfering signal.

19. The network node of claim 17, wherein the at least one characteristic identifies that the interfering signal is CRS based or DMRS based.

20. The network node of claim 17, wherein the at least one characteristic comprises a DMRS pattern comprising a virtual cell identifier associated with the interfering signal.

21. The network node of claim 17, wherein the at least one characteristic identifies a number of antenna ports in addition to the transmission mode.

22. The network node of claim 17, wherein the at least one characteristic identifies a plurality of transmission modes that may be associated with the interfering signal.

23. The network of claim 17, wherein the at least one characteristic identifies a plurality of transmission modes that may not be associated with the interfering signal.

24. The network node of claim 17, wherein the at least one characteristic identifies that the at least one transmission mode may not be used in a plurality of neighboring cells.

25. The network node of claim 17, further comprising transmitting characteristic data in a plurality of messages.

26. The network node of claim 17, wherein the at least one characteristic is tied to a cell identifier.

27. The network node of claim 26, wherein the at least one characteristic comprises a plurality of characteristics associated with a plurality of interference signals tied to the cell identifier of a neighboring cell coverage area.

28. The network node of claim 26, wherein the cell identifier is associated with a cell coverage area associated with the network node.

29. The network node of claim 17, wherein the characteristic data is transmitted to the first wireless device in a dedicated signal addressed to the first wireless device.

39. The method of claim 27, wherein the at least one characteristic identifies a plurality of transmission modes that may not be associated with the interfering signal.

40. The method of claim 27, wherein the at least one characteristic identifies that the at least one transmission mode may not be used in a plurality of neighboring cells 204.

41. The method of claim 27, further comprising transmitting characteristic data in a plurality of messages.

33. A method for using interference characterization data by a first wireless device for interference mitigation, comprising:

receiving, by the first wireless device, characteristic data identifying at least one characteristic of an interfering signal intended for a second wireless device, the characteristic data received from a network node providing telecommunications services to the first wireless device;

using, by the first wireless device, the characteristic data comprising the at least one characteristic to form an estimate of some characteristic related to the interfering signal; and

mitigating, by the first wireless device, the interfering signal intended for the second wireless device based on the estimate of some characteristic related to the interfering signal, and

wherein the at least one characteristic identifies a transmission mode of the interfering signal.

34. The method of claim 33, wherein the at least one characteristic is associated with a neighboring cell associated with the interfering signal.

35. The method of claim 33, wherein the at least one characteristic identifies that the interfering signal is CRS based or DMRS based.

36. The method of claim 33, wherein the at least one characteristic comprises a DMRS pattern comprising a virtual cell identifier associated with the interfering signal.

37. The method of claim 33, wherein the at least one characteristic identifies a number of antenna ports in addition to the transmission mode.

38. The method of claim 33, wherein the at least one characteristic identifies a plurality of transmission modes that may be associated with the interfering signal.

42. A first wireless device using interference characterization data for interference mitigation, the first wireless device comprising:

memory containing executable instructions; and

one or more processors in communication with the memory, the one or more processors operable to execute the instructions to cause the first wireless device to;

receive characteristic data identifying at least one characteristic of an interfering signal intended for a second wireless device, the characteristic data received from a network node providing telecommunications services to the first wireless device;

use the characteristic data comprising the at least one characteristic to form an estimate of some characteristic related to the interfering signal; and

mitigate, by the first wireless device, the interfering signal intended for the second wireless device based on the estimate of some characteristic related to the interfering signal, and

wherein the at least one characteristic identifies a transmission mode of the interfering signal.

43. The first wireless device of claim 42, wherein the at least one characteristic is associated with a neighboring cell associated with the interfering signal.

44. The first wireless device of claim 42, wherein the at least one characteristic identifies that the interfering signal is CRS based or DMRS based.

45. The first wireless device of claim 42, wherein the at least one characteristic comprises a DMRS pattern comprising a virtual cell identifier associated with the interfering signal.

46. The method of claim 42, wherein the at least one characteristic identifies a number of antenna ports in addition to the transmission mode.

47. The method of claim 42, wherein the at least one characteristic identifies a plurality of transmission modes that may be associated with the interfering signal.

48. The method of claim 42, wherein the at least one characteristic identifies a plurality of transmission modes that may not be associated with the interfering signal.

49. The method of claim 42, wherein the at least one characteristic identifies that the at least one transmission mode may not be used in a plurality of neighboring cells 204.

50. The method of claim 42, further comprising transmitting characteristic data in a plurality of messages.