Broadcast ATM Switching Networks

随着B-ISDN普及到家庭，对广播业务的需求将会增加。在本地交换系统中，输出用户线路的数量远远大于输入中继线。因此，非对称广播ATM交换网络是实现该业务的必要条件。然而，大多数已经提出的交换网络都是对称交换网络。在本研究中，非对称交换是通过分割输出和利用现有的对称交换网络来提出的。此外，作为零件使用的对称部件的尺寸通过在前面放置聚光器来减小。这减少了硬件的总量。

As B-ISDN spreads to the home, the demand for broadcast services will increase. In the local switching system, the number of output subscriber lines is much larger than the input trunk lines. So, asymmetric broadcast ATM switching network is necessary for this service. However, most switching networks which have already been proposed, are symmetric ones. In this study, asymmetric ones are proposed by partitioning the output and by using existing symmetric switching networks. Furthermore, the size of symmetric ones which are used as parts, is reduced by putting concentrators in the front. This decrease the total amount of hardware.