Solutions to Smooth Evolution from GSM to WCDMA

摘要

Concerning the development trend of the GSM/GPRS network,andfrom the angle of radio networks and core networks,this article pre-sents three concrete solutions to the evolution towards WCDMA.Itpoints out that the overlay network scheme has the minimum impacton the operation of current networks,and ensures the evolution ofNGN to all-IP networks and the smooth transition of 2G services.