As the wireless communication business growing, ordinary voice services cannot satisfy the increasing demands of clients, while the offering of new value add-on services ( VAS) is becoming the main approach to attract clients and improve average revenue per unit ( ARPU). 随着无线通信业务的发展,简单的语音服务已经无法满足用户越来越高的使用要求,而提供新的增值服务将成为吸引用户和提高平均用户收益值(ARPU)的重要手段。