Method and apparatus for transmitting and receiving common channel in a cellular wireless communication system supporting scalable bandwidth

An apparatus for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the apparatus comprising:

• a controller for determining a system bandwidth of a cell and a reception bandwidth of User Equipments (UEs) located in the cell;
• a synchronous channel (SCH) subcarrier symbol generator for generating a first and in the alternative a second SCH sequence composed of a plurality of SCH subcarrier symbols according to the system bandwidth;
• a subcarrier symbol mapper for mapping the first SCH sequence to a central band of the system band, which has a bandwidth that is greater than or equal to a minimum bandwidth required for detecting an SCH, and additionally mapping second SCH sequences to bands that are spaced from the central band and have the minimum bandwidth, if the system bandwidth is greater than twice the reception bandwidth;
• and
• an Inverse Fast Fourier Transform (IFFT) unit for transmitting a signal in a frequency domain to which at least one of the first SCH sequence and the second SCH sequences is mapped, to the UEs located in the cell.

A method for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the method comprising:

• determining a system bandwidth of a cell and a reception bandwidth of User Equipments (UEs) located in the cell;
• repeating and mapping a Paging Channel (PCH) message for paging a UE in an idle mode in two bands, each of which is adjacent to a center frequency of the system band and has a maximum PCH bandwidth required for transmitting a PCH message for paging a UE in an idle mode, if the system bandwidth is greater than or equal to twice the reception bandwidth;
• and
• transmitting a signal in a frequency domain to which the PCH message is mapped, to UEs located in the cell.

An apparatus for transmitting a common channel in a cellular communication system that supports a scalable system bandwidth and uses multiple access technology, the apparatus comprising:

• a controller for determining a system bandwidth of a cell and a reception bandwidth of User Equipments (UEs) located in the cell;
• a subcarrier symbol mapper for repeating and mapping a Paging Channel (PCH) message for paging a UE in an idle mode in two bands, each of which is adjacent to a center frequency of the system band and has a maximum PCH bandwidth required for transmitting a PCH message for paging a UE in an idle mode, if the system bandwidth is greater than or equal to twice the reception bandwidth;
• and
• an Inverse Fast Fourier Transform (IFFT) unit for transmitting a signal in a frequency domain to which the PCH message is mapped, to UEs located in the cell.