setup or handover processes when node bs have inconsistent versions due to incompatibility for dpdch and dpcch standard in other words the present invention provides an ovsf code and i q channel allocation method optimized to minimize the papr increase for eudch related physical channels while maintaining the existing rel 5 wcdma standard for the dpdch and the dpcch core uplink physical channels first assuming that the existing uplink channels undergo ovsf code and i q channel allocation as defined in the current standard in an ovsf code and i q channel allocation method by maintaining full compatibility with the existing rel 5 wcdma system the present invention provides an ovsf code and i q channel allocation method optimized for the case where an e dpcch and an e dpdch for transmission of eudch packet data are additionally transmitted second the case where compatibility with the hs dpcch is partially lost while compatibility with the existing dpdch and dpcch is maintained will be taken into consideration in the current rel 5 wcdma standard if the maximum number of transmittable dpdchs is one the hs dpcch is transmitted on a q channel using an ovsf code 256 64 in this case because an e dpdch cannot use an ovsf code 4 1 on the q channel a maximum eudch data rate is limited accordingly in order to solve the problem the present invention provides a code allocation rule for the hs dpcch e dpcch and e dpdch so as to enable the e dpdch to use the ovsf code 4 1 on the q channel and reduce a papr of.