System And Method For Providing Interference Characteristics For Interference Mitigation

• US 20150098411A1
• 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 9,673,957 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0482 Adaptive codebooks
• CPC Class Codes: H04B 7/0486 taking channel rank into account
• CPC Class Codes: H04B 7/066 Combined feedback for a number of channels, e.g. over several subcarriers like in orthogonal frequency division multiplexing [OFDM]
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

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. The network node may provide telecommunications services for a first wireless device associated with the network node. Characteristic data may be identifying by the network node. The characteristic data may be associated with at least one characteristic of an interfering signal associated with a second wireless device. The characteristic data may be transmitted to the first wireless device and may identify a precoder granularity configured for least one physical resource block pair associated with the interfering signal.

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 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 a precoder granularity configured for least one physical resource block pair 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 at least one precoder codebook that may be associated with the interfering signal.

4. The method of claim 1, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may be associated with the interfering signal.

5. The method of claim 1, wherein the at least one characteristic identifies at least one precoder codebook that may not be associated with the interfering signal.

6. The method of claim 1, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may not be associated with the interfering signal

7. The method of claim 1, wherein the at least one characteristic indicates that a selected precoder codebook may be used across all scheduled resource blocks of the interfering signal.

8. The method of claim 1, wherein the at least one characteristic identifying a precoder granularity comprises an indication that a selected precoder codebook may be used for resource blocks of the interfering signal at a configurable frequency.

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

10. The method of claim 9, 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.

11. The method of claim 9, wherein the cell identifier is associated with a cell coverage area associated with the network node.

12. 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.

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

14. 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.

15. 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.

16. 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 identifies a precoder granularity configured for least one physical resource block pair associated with the interfering signal.

17. The network node of claim 16, wherein the at least one characteristic data is associated with a neighboring cell associated with the interfering signal.

18. The network node of claim 16, wherein the at least one characteristic identifies at least one precoder codebook that may be associated with the interfering signal.

19. The network node of claim 16, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may be associated with the interfering signal.

20. The network node of claim 16, wherein the at least one characteristic identifies at least one precoder codebook that may not be associated with the interfering signal.

21. The network node of claim 16, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may not be associated with the interfering signal

22. The network node of claim 16, wherein the at least one characteristic indicates that a selected precoder codebook may be used across all schedule resource blocks of the interfering signal.

23. The network node of claim 16, wherein the at least one characteristic identifying a precoder granularity comprises an indication that a selected precoder codebook may be used for resource blocks of the interfering signal at a configurable frequency.

24. The network node of claim 16, wherein the at least one characteristic is tied to a cell identifier.

25. The network node of claim 24, 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.

26. The network node of claim 24, wherein the cell identifier is associated with a cell coverage area associated with the network node.

27. The network node of claim 16, wherein the characteristic data is transmitted to the first wireless device in a dedicated signal addressed to the first wireless device.

28. The network node of claim 16, wherein the at least one characteristic applies to a plurality of interfering signals received by the first wireless device.

29. The network node of claim 16, wherein the at least one characteristic is transmitted using a higher layer signaling selected from the group consisting of RRC and MAC.

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

31. 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 the some characteristic related to the interfering signal, and

wherein the at least one characteristic identifies a precoder granularity configured for least one physical resource block pair associated with the interfering signal.

32. The method of claim 31, wherein the at least one characteristic data is associated with a neighboring cell associated with the interfering signal.

33. The method of claim 31, wherein the at least one characteristic identifies at least one precoder codebook that may be associated with the interfering signal.

34. The method of claim 31, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may be associated with the interfering signal.

35. The method of claim 31, wherein the at least one characteristic identifies at least one precoder codebook that may not be associated with the interfering signal.

36. The method of claim 32, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may not be associated with the interfering signal

37. The method of claim 31, wherein the at least one characteristic indicates that a selected precoder codebook may be used across all schedule resource blocks of the interfering signal.

38. The method of claim 31, wherein the at least one characteristic identifying a precoder granularity comprises an indication that a selected precoder codebook may be used for resource blocks of the interfering signal at a configurable frequency.

39. 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 the some characteristic related to the interfering signal, and

wherein the at least one characteristic identifies a precoder granularity configured for least one physical resource block pair associated with the interfering signal.

40. The first wireless device of claim 39, wherein the at least one characteristic data is associated with a neighboring cell associated with the interfering signal.

41. The first wireless device of claim 39, wherein the at least one characteristic identifies at least one precoder codebook that may be associated with the interfering signal.

42. The first wireless device of claim 39, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may be associated with the interfering signal.

43. The first wireless device of claim 39, wherein the at least one characteristic identifies at least one precoder codebook that may not be associated with the interfering signal.

44. The first wireless device of claim 39, wherein the at least one characteristic identifies a subset of precoders within at least one precoder codebook that may not be associated with the interfering signal

45. The first wireless device of claim 39, wherein the at least one characteristic indicates that a selected precoder codebook may be used across all schedule resource blocks of the interfering signal.

46. The first wireless device of claim 39, wherein the at least one characteristic identifying a precoder granularity comprises an indication that a selected precoder codebook may be used for resource blocks of the interfering signal at a configurable frequency.