System and method for providing interference characteristics for interference mitigation

Patent metadata

Field	Value
Publication number	US-9451625-B2
Application number	US-201414490211-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 19, 2013
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

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.

First claim

The invention claimed is:

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 at least one characteristic of the interfering signal associated with the second wireless device, and
wherein the characteristic data identifies one or more transmission modes not 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 Cell Specific Reference Signal (CRS) based or Demodulations Reference Signal (DMRS) based.

4. The method of claim 1 , wherein the at least one characteristic comprises a Demodulations Reference Signal (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 that the at least one transmission mode may not be used in a plurality of neighboring cells.

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

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 Radio Resource Control (RRC) and Medium Access Control (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 Physical Downlink Control Channel (PDCCH) and Enhanced Physical Downlink Control Channel (e-PDCCH).

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 at least one characteristic of the interfering signal associated with the second wireless device, and

wherein the characteristic data identifies one or more transmission modes not associated with the interfering signal.

17. The network node of claim 16 , wherein the at least 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 that the interfering signal is Cell Specific Reference Signal (CRS) based or Demodulations Reference Signal (DMRS) based.

19. The network node of claim 16 , wherein the at least one characteristic comprises a Demodulations Reference Signal (DMRS) pattern comprising a virtual cell identifier associated with the interfering signal.

20. The network node of claim 16 , wherein the at least one characteristic identifies a number of antenna ports in addition to the transmission mode.

21. The network node of claim 16 , wherein the at least one characteristic identifies a plurality of transmission modes that may be associated with the interfering signal.

22. The network node of claim 16 , wherein the at least one characteristic identifies that the at least one transmission mode may not be used in a plurality of neighboring cells.

23. The network node of claim 16 , further comprising transmitting characteristic data in a plurality of messages.

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 Radio Resource Control (RRC) and Medium Access Control (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 Physical Downlink Control Channel (PDCCH) and Enhanced Physical Downlink Control Channel (e-PDCCH).

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 some characteristic related to the interfering signal, and
wherein the characteristic data identifies one or more transmission modes not associated with the in

Assignees

• Ericsson Telefon Ab L M
• ERICSSON TELEFON AB L M (publ)

Inventors

• Jöngren George
• Lincoln Bo
• Sesia Stefania

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/541 Primary

  using the level of interference · CPC title

• H04L27/00

  Modulated-carrier systems · CPC title

• H04L1/0027

  Scheduling of signalling, e.g. occurrence thereof · CPC title

• H04L1/18

  Automatic repetition systems, e.g. Van Duuren systems · CPC title