快速包交换技术在CDMA基站中的应用

The Fast Packet Switching Technology Used in CDMA Base Station

针对ＡＴＭ及帧中继在窄带实时业务方面的局限性，提出了一种结合二者优点的变长包硬件交换方案：采用长度在１２０个字节以内的变长帧结构，根据帧头的ＤＬＣＩ值由硬件完成分组的传递与交换，以有效地支持窄带实时话音业务及宽带数据业务．在实现上，自行设计了相关的整套交换芯片组．该方案现已成功地应用在自主研制的ＣＤＭＡ基站中．

To the problem of unsuitable use in narrow band real time service with ATM and frame relay, A scheme of fast variable length packet switching through hardware implementation which combine with the advantages of ATM and frame relay is given to support narrow band real time voice services and wide band data services effectively. In scheme, the variable length frame structure is used, the maximum length is limited less than 120 bytes, packets are transfered and switched according to DLCI located in the head of the frame. To implement the system, we designed the entire relative switching chipset. Now the scheme is used successfully in CDMA base station developed by ourselves.