说明：  IMT-DS FDD(WCDMA)系统无线接口层2技术规范： 媒质接入控制（MAC）协议 IMT-DS FDD(WCDMA) System Radio Interface Layer 2 Technical Specification: Media Access Control(MAC) Protocol
(IMT-DS FDD (WCDMA) radio interface layer 2 system specifications: Medium Access Control (MAC) protocol IMT-DS FDD (WCDMA) System Radio Interface Layer 2 Technical Specification: Media Access Control (MAC) Protocol)