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17.宽带接入网由线路、传输设备等物理设施组成,联接电信业务节点和相关用户网络,可提供宽带信息传送承载能力的信息系统。18.第三代移动通信网指继目前的GSM数字蜂窝网和窄带CDMA网之后,采用国际电信联盟定义的第三代移动通信技术和标准(IMT-2000),以承载数据业务为主的高速、宽带移动通信网络。包括核心网、无线接入网和终端。第三代移动通信采用了频谱利用率更高的无线技术,可支持385kps以上速率的中高速移动数据业务,因而可实现包括活动图像在内的移动多媒体业务。19.地理空间信息系统指以特定的地球投影数据模型进行空间定位,
17. Broadband access network by the line, transmission equipment and other physical facilities, connecting the telecommunications business nodes and related user networks, broadband information can provide the carrying capacity of information systems. 18. The third generation mobile communication network refers to the third generation mobile communication technology and standard (IMT-2000) defined by the International Telecommunication Union, following the current GSM digital cellular network and narrowband CDMA network. The third generation mobile communication network refers to the high speed , Broadband mobile communication network. Including core network, wireless access network and terminal. The third generation of mobile communications uses a more spectrum-efficient wireless technology that supports high-speed mobile data services at rates above 385 kps, enabling mobile multimedia services, including motion pictures. 19. Geospatial Information Systems refers to the spatial positioning of a particular Earth projection data model,