基于支持多级业务的单码CDMA系统 ,本文设计了一种适合于多级业务接入的两层控制方案。借助于该方案 ,实时业务用户一旦被接纳就立刻进行通信。而非实时数据用户的通信过程要受到呼叫层和突发层双重的控制。这样 ,前者的QoS能够得到保证 ,而后者则可以充分利用网络暂时闲置的信道容量。 Based on the single-code CDMA system supporting multi-level services, a two-layer control scheme suitable for multi-level service access is designed in this paper. With this approach, real-time business users communicate once they are accepted. Instead of real-time data user communication process to be double layer control of the call layer and the burst layer. In this way, the former’s QoS can be guaranteed, while the latter can take full advantage of the network temporarily idle channel capacity.