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蜂窝数字分组数据（CDPD）网是一种移动分组数据技术，具有较低的建网、运营成本和业务费用，因此具有广泛推广的价值。详细介绍了CDPD网与空中接口有关的协议分层，各层的实现过程，以及各层之间的相互关系，重点说明了MAC层的具体实现细节，前向信道和反向信道的配置以及数据复用过程等。
The cellular digital packet data (CDPD) network is a mobile packet data technology that has a low cost of networking, operating costs and operating costs and therefore has wide spread value. The layering of protocol, the realization process of each layer and the interrelationship between layers of CDPD network and air interface are introduced in detail. The concrete realization details of MAC layer, the configuration of forward channel and reverse channel and the data Reuse process.