METHOD FOR AVOIDING INTER-CELL INTERFERENCE IN A MULTI-CELL ENVIRONMENT
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Abstract
A method for avoiding an inter-cell interference (ICI) in a multi-cell environment is disclosed. The method includes restricting the use of a PMI in an interfering cell so as to improve a reception performance of a mobile station located at an interfered cell edge. The mobile station measures a restricted-PMI of the interfering cell, which is prohibited from use in the interfering cell, and transmits the measured restricted PMI to the interfering cell. The use of the restricted PMI is prohibited from use in a mobile station in the interfering cell.
114 Citations
53 Claims
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1-40. -40. (canceled)
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41. A method for allowing a mobile station to reduce an inter-cell interference (ICI) in a multi-cell environment, the method comprising:
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receiving a threshold value for an inter-cell interference (ICI) reduction mode operation from a serving base station; transmitting a request signal for transmission of a precoding matrix index (PMI) to the serving base station, when an amount of interference applied to a specific frequency band by at least one neighbor base station is lower than the threshold value; upon receiving a confirmation signal corresponding to the request signal from the serving base station, calculating, in relation to the at least one neighbor base station, at least one of a first PMI for maximizing the interference applied to the specific frequency band and a second PMI for minimizing the interference; and transmitting at least one of the calculated first PMI and the calculated second PMI to the serving base station. - View Dependent Claims (42, 43, 44, 45, 46, 47)
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48. A method for allowing a specific base station to reduce an inter-cell interference (ICI) in a multi-cell environment, the method comprising:
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transmitting a threshold value for an inter-cell interference (ICI) reduction mode operation to several mobile stations belonging to the specific base station; receiving a request signal for transmission of a precoding matrix index (PMI) from a mobile station in which an amount of interference applied to a specific frequency band by at least one neighbor base station is lower than the threshold value, from among the several mobile stations; transmitting a response signal to the request signal to the mobile station having transmitted the request signal; receiving, in relation to the at least one neighbor base station, at least one of a first PMI for maximizing the interference applied to the specific frequency band and a second PMI for minimizing the interference from the mobile station having transmitted the request signal; and transmitting at least one of the received first PMI and the received second PMI to the at least one neighbor base station. - View Dependent Claims (49, 50, 51, 52, 53)
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Specification