Patent ID: 6904012

Claim:
A device for allocating a forward common channel in a CDMA (Code Division Multiple Access) communication system, comprising: a plurality of channel transmitters for spreading a forward common channel message according to allocated orthogonal code; a storage medium for storing a first orthogonal code number for a forward common channel used in a first CDMA communication system and second orthogonal code numbers for a forward common channel used in a second CDMA communication system, wherein the second orthogonal code numbers are generated by sequentially adding multiples of an orthogonal code length used at a maximum data rate to the first orthogonal code number; and a controller for allocating an orthogonal code number from among the first and second orthogonal code numbers stored in the storage medium according to mobile station type information from a mobile station to a channel transmitter from among the plurality of channel transmitters, wherein a length of the first orthogonal code is equal to a length of each second orthogonal code, and the lengths of the first and second orthogonal codes are longer than the orthogonal code length used at a maximum data rate.