Mobile communication system for providing carrier aggregation between digital units and method for processing signal in the same

The signal processing method in a digital mobile communication system and a signal system for providing a carrier between the integrated process is started. The system is connected to the core system, a plurality of digital signal processing apparatus for processing each of the radio digital signal; At least two coupled to the digital signal processing apparatus, to perform resource allocation on signals processed by the digital signal processing device connected to the blade server; And passed by is physically separated with the plurality of digital signal processing apparatus, and converts and amplifies the digital signal from the digital signal processing unit and transmitted to the terminal, it receives a signal transmitted from the terminal to the digital signal processor plurality of which includes a wireless signal processing unit. Here, the system uses the integrated carrier between the radio signal processing unit that uses a different frequency to each other that are each connected to at least two or more digital signal processing apparatus provides the mobile communication service for the terminal.