说明：  IMT-DS FDD(WCDMA)系统无线接口层2技术规范： 分组数据集中协议(PDCP) IMT-DS FDD(WCDMA) System Radio Interface Technical Specification: Packet Data Convergence Protocol
(IMT-DS FDD (WCDMA) radio interface layer 2 system specification: centralized protocol packet data (PDCP) IMT-DS FDD (WCDMA) System Radio Interface Technical Specification: Packet Data Convergence Protocol)