| 摘要 |
A method of allocating ranging codes by a macro base station in a communication system is provided. The method includes broadcasting information related to adjacent femto base stations, receiving a ranging request including class information indicating a degree of a strength of interference of an adjacent macro base station from a terminal, and allocating one of ranging codes included in a code subset dedicated to a corresponding class to the terminal, the ranging codes being allocatable to only terminals in a class indicated by the class information.
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