1引言目前,3G这一热点名词经常见诸于各大媒体报刊,C D M A2000及其演进技术HRPD(H i g h R a t e P a c k e dData),也就是人们常说的EV-DO,作为3G技术的一种,也倍受大家关注。其中,无线资源可以说是3G网络中最为稀缺的资源,因此,如何提高频谱利用率,利用无线网络设施向尽量多 1 Introduction At present, the hot topic of 3G is often found in the major media newspapers, CDM A2000 and its evolution technology HRPD (High Packet Data), which is often referred to as EV-DO, as a 3G technology Species, but also much attention. Among them, the wireless resources can be said to be the most scarce resources in the 3G network. Therefore, how to improve the spectrum utilization rate, use the wireless network facilities to maximize