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开放的WCDMA规范3GPP关于WCDMA系统的技术规范分为R99和R4/5两个版本，目前R99、R4已完成，R5将在今年定稿。R99是基于GSM和GPRS演进的系统，而R4、R5是基于全IP的网络架构，尤其是提出了全新的业务理念——OSA(开放业务接入平台)，其核心思想是利用WCDMA承载网络所提供各种标
Open WCDMA specification 3GPP technical specifications on WCDMA system is divided into two versions of R99 and R4 / 5, the current R99, R4 has been completed, R5 will be finalized this year. R99 is based on GSM and GPRS evolution system, and R4, R5 is based on all-IP network architecture, in particular, proposed a new business philosophy - OSA (Open Business Access Platform), the core idea is to use WCDMA bearer network Provide a variety of standard