METHOD OF TRANSMITTING AND RECEIVING FEEDBACK INFORMATION AND MOBILE STATION/BASE STATION APPARATUS THEREFOR

• US 20100208610A1
• Filed: 02/19/2010
• Published: 08/19/2010
• Est. Priority Date: 02/19/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jae Wan, Lim, Dong Guk, Ihm, Bin Chul, Koo, Ja Ho, Kim, Su Nam, Lee, Wook Bong
• Granted Patent: US 8,374,160 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation
• CPC Class Codes: H04L 5/0062 Avoidance of ingress interference, e.g. ham radio channels
• 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 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/30 Special cell shapes, e.g. doughnuts or ring cells
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

A method of transmitting and receiving feedback information in a multi-cell based wireless communication system using FFR, a mobile station apparatus therefore and a base station apparatus therefore are disclosed. A mobile station is able to obtain FFR configuration information including configuration information on at least one frequency partition to which a corresponding FFR is applied per cell ID. And, the mobile station is able to transmit PMI information to a serving base station using the obtained FFR configuration information. In this case, the PMI information is specifically restricted or recommended by the mobile station among PMIs (precoding matrix indexes) used by at least one neighbor cell in an allocated specific frequency partition.

Claims

1. A method of transmitting feedback information at a mobile station (MS) in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the method comprising:

receiving a target resource unit information for feedback and inter-cell interference coordination type information indicating operation type of the inter-cell interference coordination from a serving base station (BS); and

transmitting feedback information having a type corresponding to the inter-cell interference coordination type for resource unit corresponding to the target resource unit information to the serving BS.

2. The method of claim 1, wherein the target resource unit information indicates any one of whole bandwidth, a frequency partition with index 0, and power boosted frequency partition.

3. The method of claim 1, wherein the inter-cell interference coordination type information indicates reporting of PMI (Precoding Matrix Index) restriction information or PMI recommendation information for one or more neighbor cell.

4. A mobile station (MS) for transmitting feedback information in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the mobile station comprising:

a receiving unit for receiving a target resource unit information for feedback and inter-cell interference coordination type information indicating operation type of the inter-cell interference coordination from a serving base station (BS); and

a transmitting unit for transmitting feedback information in a type corresponding to the inter-cell interference coordination type for resource unit corresponding to the target resource unit information to the serving BS.

5. A method of receiving feedback information at a base station (BS) in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the method of comprising:

transmitting a target resource unit information for feedback and inter-cell interference coordination type information indicating operation type of the inter-cell interference coordination to a mobile station (MS); and

receiving feedback information having a type corresponding to the inter-cell interference coordination type for resource unit corresponding to the target resource unit information from the MS.

6. A base station (BS) for receiving feedback information in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the base station comprising:

a transmitting unit for transmitting a target resource unit information for feedback and inter-cell interference coordination type information indicating operation type of the inter-cell interference coordination to a mobile station (MS); and

a receiving unit for receiving feedback information having a type corresponding to the inter-cell interference coordination type for resource unit corresponding to the target resource unit information from the MS.

7. A method of transmitting feedback information at a mobile station (MS) in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the method comprising:

obtaining FFR configuration information including configuration information on at least one frequency partition to which a corresponding FFR is applied per cell ID; and

transmitting PMI information to a serving base station using the obtained FFR configuration information, the PMI information specifically restricted or recommended by the mobile station among PMIs (precoding matrix indexes) used by at least one neighbor cell in an allocated specific frequency partition.

8. The method of claim 7, further comprising:

transmitting a signal strength/interference level gain value, which corresponds to a difference between a signal strength/interference level calculated by applying the PMI information for the at least one neighbor cell in a specific partition and a signal strength/interference level calculated in case of not applying the PMI set information, to the serving base station.

9. The method of claim 7, further comprising:

transmitting interference level information attributed to the PMI used by the at least one neighbor cell in the specific partition to the serving base station.

10. The method of claim 8, wherein the signal strength/interference level is represented as one value selected from the group consisting of SINR (Signal to Interference plus Noise Ratio), RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), RSSI (Reference Signal Strength Indicator), PD (Propagation Delay) and CINR (Carrier to Interference plus Noise Ratio).

11. A mobile station for transmitting feedback information in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the mobile station comprising:

a unit for obtaining FFR configuration information including configuration information on at least one frequency partition to which a corresponding FFR is applied per cell ID; and

a transmitting unit for transmitting PMI information to a serving base station using the obtained FFR configuration information, the PMI information specifically restricted or recommended by the mobile station among PMIs (precoding matrix indexes) used by at least one neighbor cell in an allocated specific frequency partition.

12. The mobile station apparatus of claim 11, further comprising:

a transmitting unit for transmitting a signal strength/interference level gain value, which corresponds to a difference between a signal strength/interference level calculated by applying the PMI information for the at least one neighbor cell in a specific partition and a signal strength/interference level calculated in case of not applying the PMI set information, to the serving base station.

13. The mobile station apparatus of claim 11, further comprising:

a transmitting unit for transmitting interference level information attributed to the PMI used by the at least one neighbor cell in the specific partition to the serving base station.

14. A method for receiving feedback information at a base station (BS) in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the method comprising:

receiving PMI information from a specific mobile station, the PMI information specifically restricted or recommended among PMIs (precoding matrix indexes) used by at least one neighbor cell in an allocated specific frequency partition; and

transmitting the received PMI information to at least one neighbor cell.

15. The method of claim 14, further comprising:

receiving a signal strength/interference level gain value, which corresponds to a difference between a signal strength/interference level calculated by applying the PMI information for the at least one neighbor cell in a specific partition and a signal strength/interference level calculated in case of not applying the PMI set information, from the specific mobile station.

16. The method of claim 14, further comprising:

receiving interference level information attributed to the PMI used by the at least one neighbor cell in the specific partition from the specific mobile station.

17. The method of claim 14, further comprising the step of determining the PMI, of which use is restricted or to be restricted in the specific partition, using the at least one neighbor cell and the transmitted PMI information.

18. The method of claim 15, wherein the signal strength/interference level is represented as one value selected from the group consisting of SINR (Signal to Interference plus Noise Ratio), RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality), RSSI (Reference Signal Strength Indicator), PD (Propagation Delay) and CINR (Carrier to Interference plus Noise Ratio).

19. A base station (BS) apparatus for receiving feedback information in a multi-cell based wireless communication system using FFR (fractional frequency reuse), the base station apparatus comprising:

a receiving unit for receiving PMI information from a specific mobile station, the PMI information specifically restricted or recommended among PMIs (precoding matrix indexes) used by at least one neighbor cell in an allocated specific frequency partition; and

a transmitting unit for transmitting the received PMI information to at least one neighbor cell.

20. The base station apparatus of claim 19, further comprising:

a receiving unit for receiving a signal strength/interference level gain value, which corresponds to a difference between a signal strength/interference level calculated by applying the PMI information for the at least one neighbor cell in a specific partition and a signal strength/interference level calculated in case of not applying the PMI set information, from the specific mobile station.

21. The base station apparatus of claim 19, further comprising:

a receiving unit for receiving interference level information attributed to the PMI used by the at least one neighbor cell in the specific partition from the specific mobile station.