A method for frequency reuse in a communication system having macro cells and femto cell and a system thereof

The present invention relates to a frequency reuse method and a system therefor in a communication system having a macro and small cells, this invention, any one responsible for the small cells of the small cells, and predetermined through the first and second synchronous signal broadcasting the sorting information, and the third and the small base station to broadcast to re-use the cell identifier used by the macro base station via the fourth synchronous signal; And the first and the case of detecting a sorting information from the second synchronous signal, the third and extracts the cell identifier reuse through the four sync signal frequency, comprising: a user terminal to be connected to the small base station provides a wireless communication system for re-use, whereby the terminals of the first and the second receives the synchronization signal, the steps of: determining whether the process, and the detected cell ID is identifying information for detecting the cell identifier and the judgment results by If the detected information, the providing the third and the frequency reuse method in a user terminal, comprising the step of extracting a cell identifier from the re-4 synchronous signal. femto, macro, cell identifier, cell search