Method and apparatus for transmitting control information for interference mitigation in multiple antenna system

• US 20100232539A1
• Filed: 03/11/2010
• Published: 09/16/2010
• Est. Priority Date: 03/11/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Mi-Hyun, Han, Shuangfeng, Choi, Ho-Kyu, Lee, Hyeon-Woo
• Granted Patent: US 9,008,213 B2
• Time in Patent Office: Days
• US Class Current: 375/285
• 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 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04J 11/0033 by pre-cancellation of known interference, e.g. using a matched filter, dirty paper coder or Thomlinson-Harashima precoder correlative coding in synchronous or start-stop systems H04L25/497
• CPC Class Codes: H04J 11/0053 using co-ordinated multipoint transmission/reception co-ordinated antenna or beam-forming aspects H04B7/022
• CPC Class Codes: H04L 2025/03808 Transmission of equaliser coefficients
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end

Abstract

A multiple antenna system including a mobile station and a base station are operable to perform a method for transmitting control information for interference mitigation. A Mobile Station (MS) can transmit control information for interference mitigation. The MS determines a first Precoding Matrix Index (PMI) and a second PMI for interference from an adjacent Base Station (BS). Based on a correlation level from correlation values between one of the first PMI and second PMI and the remaining PMIs in the codebook, the MS determines a level of a subset of PMIs, and feeds back information indicating the correlation level.

Claims

1. A Mobile Station (MS) operation method for transmitting control information for interference mitigation in a multiple antenna system, the method comprising:

determining one of a first Precoding Matrix Index (PMI) and a second PMI for interference from an adjacent Base Station (BS);

based on a correlation level from correlation values between one of the first PMI and second PMI and the remaining PMIs in the codebook, determining a size of a subset of PMIs; and

feeding back information indicating the correlation level corresponding the size of a subset of PMIs.

2. The method of claim 1, wherein the first PMI is a PMI causing the highest interference in the adjacent BS, and the second PMI is a PMI causing the lowest interference in the adjacent BS.

3. The method of claim 1, further comprising:

determining the correlations between the first PMI and second PMI and the remaining PMIs in the codebook, respectively; and

in descending order, sorting the correlation values between the first PMI or second PMI and the remaining PMIs in the codebook.

4. The method of claim 1, wherein the PMI subset is a plurality of recommended PMIs and a plurality of restricted PMIs.

5. The method of claim 1, wherein the correlation level is two fixed correlation levels.

6. The method of claim 1, wherein determining one of the first PMI and second PMI is instructed from a feedback polling A-MAP Information Element (IE) received from a BS.

7. A serving Base Station (BS) operation method for transmitting control information for interference mitigation in a multiple antenna system, the method comprising:

receiving a correlation level indicating a level of a subset of Primary Matrix Indexes (PMIs) from at least one or more Mobile Stations (MSs); and

exchanging PMI subset information received from the at least one or more MSs, with adjacent BSs, and coordinating the PMI use of the adjacent BSs.

8. The method of claim 7, wherein the correlation level is a correlation level sorted from correlation values between a first PMI or second PMI and the remaining PMIs in the codebook, and is two fixed correlation levels.

9. The method of claim 7, further comprising broadcasting, in a bitmap, the use of at least one or more PMIs coordinated with the adjacent BSs.

10. The method of claim 7, wherein the first PMI is a PMI causing the highest interference in the adjacent BS, and the second PMI is a PMI causing the lowest interference in the adjacent BS.

11. An interfering Base Station (BS) operation method for transmitting control information for interference mitigation in a multiple antenna system, the method comprising:

receiving a correlation level and a first Primary Matrix Index (PMI) or second PMI from a corresponding BS; and

determining a PMI subset using the correlation level and the first PMI or second PMI.

12. The method of claim 11, wherein the correlation level indicates the number of correlation values between the first PMI or second PMI determined in a Mobile Station (MS) and the remaining PMIs in the codebook.

13. The method of claim 11, wherein the correlation values between the first PMI or second PMI and the remaining PMIs in the codebook are linked with at least one or more PMIs.

14. The method of claim 11, wherein the first PMI is a PMI causing the highest interference in an adjacent BS, and the second PMI is a PMI causing the lowest interference in the adjacent BS.

15. The method of claim 11, further comprising determining whether to restrict or recommend the use of the PMI subset.

16. A multiple antenna system for transmitting control information for interference mitigation, the system comprising:

at least one Mobile Station (MS) is configured to, based on correlation levels between one of a first Primary Matrix Index (PMI) and a second PMI and the remaining PMIs in the codebook, feedback a plurality of PMI subsets for interference from an adjacent Base Station (BS), the plurality of PMI subsets fed back to a serving BS configured to, based on the plurality of PMI subsets fed back from the plurality of MSs, exchange with adjacent BSs, and coordinate the PMI use of the adjacent BSs.

17. The system of claim 16, wherein the at least one MS is configured to:

determines one of the first PMI and the second PMI for the interference from the adjacent BS,

based on a correlation level from correlation values between one of the first PMI and second PMI and the remaining PMIs in the codebook, determine a level of a subset of PMIs, and

feed back information indicating the correlation level.

18. The system of claim 17, wherein the at least one MS is configured to:

determine the correlations between the first PMI and second PMI and the remaining PMIs in the codebook, respectively, and

in descending order, sort the correlation values between the first PMI or second PMI and the remaining PMIs in the codebook.

19. The system of claim 17, wherein the PMI subset is a plurality of recommended PMIs and a plurality of restricted PMIs.

20. The system of claim 17, wherein the correlation level is two fixed correlation levels.

21. The system of claim 16, wherein the first PMI is a PMI causing the highest interference in the adjacent BS, and the second PMI is a PMI causing the lowest interference in the adjacent BS.

22. The system of claim 17, wherein the MS determines one of the first PMI and second PMI based on a feedback polling A-MAP Information Element (IE) received from a BS.

23. A Mobile Station (MS) operation method for transmitting control information for interference mitigation in a multiple antenna system, the method comprising:

determining the cross correlations between one of a first Precoding Matrix Index (PMI) and a second PMI and the remaining PMIs in the codebook, respectively;

in ascending order, sorting the cross correlation values;

determining the number of at least one or more cross correlation values which to feed back among the sorted cross correlation values; and

feeding back related information for interference mitigation comprising a correlation level indicating the determined number of cross correlation values.

24. The method of claim 23, wherein the first PMI is a PMI causing the highest interference in an adjacent Base Station (BS), and the second PMI is a PMI causing the lowest interference in the adjacent BS.

25. The method of claim 23, wherein the correlation level is two fixed correlation levels.

26. The method of claim 23, wherein the correlation between one of the first PMI and second PMI and the remaining PMIs is instructed from a feedback polling A-MAP Information Element (IE) received from a BS.

27. A serving Base Station (BS) operation method for transmitting control information for interference mitigation in a multiple antenna system, the method comprising:

receiving a correlation level indicating a level of a subset of Precoding Matrix Indexes (PMIs) from at least one or more Mobile Stations (MSs);

based on the correlation level, constructing a recommended PMI subset and a restricted PMI subset; and

transmitting the recommended PMI subset and the restricted PMI subset to adjacent BSs and coordinating the PMI use of the adjacent BSs.

28. The method of claim 27, wherein the correlation level is a correlation level sorted from correlation values between a first PMI or second PMI and the remaining PMIs in the codebook, and is two fixed correlation levels.

29. The method of claim 27, further comprising broadcasting, in a bitmap, the use of at least one or more PMIs coordinated with the adjacent BSs.

30. The method of claim 28, wherein the first PMI is a PMI causing the highest interference in the adjacent BS, and the second PMI is a PMI causing the lowest interference in the adjacent BS.