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来源：百度知道 编辑：UC知道 时间：2024/05/14 11:38:07
IAC的一个重要特性在于具有带宽和资源控制功能，能够检测和预留预定义的数据带宽，以确保DVB-T网络能够同时传送多路数据流，或当DVB-T网络带宽有限时，保障优先级高的用户通信。如：当通信受阻时，未经预留的移动车载用户的请求就会被拒绝，系统发送拒绝信息到用户，从而实现保证重要用户的通信。
FLUTE Carousel控制功能
FLUTE Carousel是通过DVB-T广播网络来定期广播需传送的文件，达到文件传送的目的。IAC接收到TCRD来的请求后，从CCC内的文件服务器获得需传送的文件，并将文件上传到FLUTE Carousel，结合现行空余带宽，控制FLUTE Carousel来控制、传送文件。
TETRA 用户请求处理功能（TCRD）
位于CAD内的TCRD，是管理用户发起的请求。
用户通过SDS发送请求到CAD，CAD收到的SDS包括TETRA用户的用户ID、移动数据终端的标识地址及特定内容的ID号（存储在CAD应用程序中的用户数据库来唯一地标识用户需要的特定内容）。基于SDS内容的请求，TCRD将一个包含指定摄像的URI、源用户ID的消息发送到IAC，发出开始广播的请求。当TETRA终端用户不需要继续接收文件或者观看指定摄像时，终端用户发送停止广播的SDS到CAD，TCRD根据SDS向IAC发出停止广播的请求。
Bandwidth and resource control the function.
An important characteristic of IAC lies in having bandwidth and resource to control the function, can measure and reserve and book the bandwidth of data of justice, so as to ensure DVB-T network can convey many No. dataflows at the same time, or when DVB-T network is limited in bandwidth, the users ensuring PRI to be tall communicate. For instance: Will be refused without users' request in year of movement train that is reserved when communication is obstructed, the system sends the information of refusing and gets to users, thus realize guaranteeing the communication of important users.
FLUTE Carousel controls the function.
FLUTE Carousel come fixed radio need file that convey through DVB-T broadcast network, achieve the goal that the file is conveyed. After the request that IAC receives to TCRD, the file needed to convey from file server in CCC, and upload the file to FLUTE Carousel, combine the current vacan