System and method for providing interference characteristics for interference mitigation

Patent metadata

Field	Value
Publication number	US-10687225-B2
Application number	US-201414490434-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Sep 19, 2013
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

According to certain embodiments, a method for providing interference characterization data by a network node includes providing telecommunications services for a first wireless device located associated with the network node. The network node identifies characteristic data associated with at least one characteristic of an interfering signal associated with a second wireless device. The characteristic data associated with the interfering signal associated with the second wireless device is transmitted to the first wireless device. The at least one characteristic may identify at least one power characteristic associated with the interfering signal.

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,
wherein the at least one characteristic is associated with a neighboring cell associated with the interfering signal,
wherein the characteristic data includes two parameters, P A and P B , associated with the interfering signal,
wherein the characteristic data includes a number of CRS antenna ports associated with the interfering signal, and
wherein a first power ratio for data in symbols that do not carry cell-specific reference symbols (CRSs) is determined with the P A parameter and a second power ratio for data in symbols that carry CRSs is determined with the P B parameter.

2. The method of claim 1 , wherein the interfering signal comprises cell-specific reference symbols (CRS) and data symbols, and the at least on characteristic comprises a ratio of the power levels associated with the CRS and the data symbols.

3. The method of claim 1 , wherein the interfering signal comprises cell-specific reference symbols (CRS) and Quadrature Phase-Shift Keying (QPSK) data symbols, and the at least one characteristic comprises a ratio of power levels associated with CRS and QPSK data symbols.

4. The method of claim 1 , wherein the interfering signal comprises cell-specific reference symbols (CRS and Quadrature Phase-Shift Keying (QPSK) data symbols, and the at least one characteristic comprises a ratio of power levels associated with the CRS and QPSK data symbols of a serving cell associated with the network node serving the first wireless device.

5. The method of claim 1 , wherein the at least one characteristic identifies a plurality of power level ratios.

6. The method of claim 1 , wherein the at least one characteristic identifies a plurality of power level ratios that the first wireless device may assume are not associated with the interfering signal.

7. The method of claim 1 , wherein the at least one characteristic comprises data identifying that a power level ratio of the interfering signal is the same as a power level ratio associated with the first wireless device.

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

9. The method of claim 8 , 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.

10. The method of claim 8 , wherein the cell identifier is associated with a cell coverage area associated with the network node.

11. 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.

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

13. 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.

14. 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.

15. 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,
wherein the at least one characteristic is associated with a neighboring cell associated with the interfering signal,
wherein the characteristic data includes two parameters, P A and P B , associated with the interfering signal,
wherein the characteristic data includes a number of CRS antenna ports associated with the interfering signal, and
wherein a first power ratio for data in symbols that do not carry cell-specific reference symbols (CRSs) is determined with the P A parameter and a second power ratio for data in symbols that carry CRSs is determined with the P B parameter.

16. The network node of claim 15 , wherein the interfering signal comprises cell-specific reference symbols (CRS) and data symbols, and the at least on characteristic comprises a ratio of the power levels associated with the CRS and the data symbols.

17. The network node of claim 15 , wherein the interfering signal comprises cell-specific reference symbols (CRS) and Quadrature Phase-Shift Keying (QPSK) data symbols, and the at least one characteristic comprises a ratio of power levels associated with CRS and QPSK data symbols.

18. The network node of claim 15 , wherein the interfering signal comprises cell-specific reference symbols (CRS and Quadrature Phase-Shift Keying (QPSK) data symbols, and the at least one characteristic comprises a ratio of power levels associated with the CRS and QPSK data symbols of a serving cell associated with the network node serving the first wireless device.

19. The network node of claim 15 , wherein the at least one characteristic identifies a plurality of power level ratios.

20. The network node of claim 15 , wherein the at least one characteristic identifies a plurality of power level ratios that the first wireless device may assume are not associated with the interfering signal.

21. The network node of claim 15 , wherein the at least one characteristic comprises data identifying that a power level ratio of the interfering signal is the same as a power level ratio associated with the first wireless device.

22. The network node of claim 15 , wherein the at least one characteristic is tied to a cell identifier.

23. The network node of claim 22 , 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.

24. The network node of claim 22 , wherein the cell identifier is associated with a cell coverage area associated with the network node.

25. The network node of claim 15 , wherein the characteristic data is transmitted to the first wireless device in a dedicated signal addressed to the first wireless device.

26. The network node of claim 15 , wherein the at least one characteristic applies to a plurality of interfering signals received by the first wireless device.

27. The network node of claim 15 , wherein the at least one characteristic is transmitted

Assignees

• Ericsson Telefon Ab L M

Inventors

• Jöngren George
• Lincoln Bo
• Sesia Stefania

Classifications

• H04W72/541

  using the level of interference · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04W52/16

  Deriving transmission power values from another channel · CPC title

• H04W52/40

  during macro-diversity or soft handoff · CPC title

• H04L27/00

  Modulated-carrier systems · CPC title