As the voice of China 3G closes on day by day

almost all operations merchants will have to start planning for the construction of 3G networks. The planning of 3G network is made up of wireless network

core network

and carrying network. Carrying Network includes the IP bear network and the traditional trans- mission networks. This paper focuses mainly on transmission network. Moreover

due to the major dif- ferences between 2G and 3G is UTRAN

this paper will focus on the transmission network construction schemes of UTRAN.