The cellular digital packet data(CDPD) system is a wireless packet communication system based on analog cellular telephone networks.

蜂窝数字分组数据（CDPD）系统是基于模拟蜂窝电话网的无线分组数据通信系统。

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At present, the work related to ideal flow scheduling system and packet scheduling algorithm for error-prone wireless channel is a hot topic in the research field of wireless communication.

目前，研究适合于信道出错、通道容量可变的无线网络理想流调度系统及其数据包调度算法是无线领域研究的一个热点问题。

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Based on "ALL IP" network background in communication system, the packet network as a unified bearer network will face new problems of synchronization need.

在通信系统全网IP化的大背景下，分组网络作为统一承载网将面临新的同步需求问题。

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