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。
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。
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。
In a data communication system capable of variable rate transmission, high rate packet data transmission improves utilization of the forward link and decreases the transmission delay.
在一种可以用可变速率传输的数据通信系统中，高速率分组数据传输改进了正向链路的应用，并降低了传输延迟。
At the same time, the protocol should be designed to minimize the system packet loss rate, packet loss rate is an important measurement of the communication protocol.
同时，协议设计应尽量降低系统丢包率，丢包率将是衡量该协议好坏的重要指标。
The experimental results show that under this communication protocol, the sensor node has a small energy consumption and the system has a low packet loss rate.
实验结果表明，该通信协议下，传感节点具有较小的能耗，系统具有较低的丢包率。
This design includes design of a FPGA based Core Control System, which can achieve communication channels transmit and receive, packet storage etc.
然后，根据模块划分设计了基于FPGA的核心控制卡电路板，实现一个具有调度、线路收发、存储、网络管理等功能的基本核心控制卡系统。
This design includes design of a FPGA based Core Control System, which can achieve communication channels transmit and receive, packet storage etc.
然后，根据模块划分设计了基于FPGA的核心控制卡电路板，实现一个具有调度、线路收发、存储、网络管理等功能的基本核心控制卡系统。
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