波分复用星形网的波长重用扩容

针对有限的数据信道波长对波分复用星形单跳网容量限制,提出了一种波长重用和多耦合器内连相结合的组网扩容方法.该方法不但可将网络所支持的节点数(网络容量)扩大一倍;而且网络的所有数据信道波长都得到重用,网络的吞吐量增加一倍.在网络节点数不变的条件下,通过波长重用,可大大减少网络中通信节点的排队时延,缓和各通信节点对数据信道波长使用权的竞争矛盾,有效地改善网络性能.此外,该方法结构简单,易于实施.

Expanding the Capacities of WDM Star Networks by Reusing Wavelengths

In order to expand the capacities of WDM star networks and free them from the restriction caused by the limited number of wavelengths, a scheme of reusing wavelengths is proposed in this paper. According to the scheme, not only can the number of nodes be doubled, but also all the data wavelengths can be reused in the network and the throughput of the network doubled. With the same number of nodes, the delay of the network can be greatly reduced and the properties of the network effectively improved. Besides, through the network structure proposed is simple, and the scheme can be easy implemented in practice. In this paper, the network structure is introduced first. Next, the properties of reusing wavelengths in the network are analyzed. The required gain and output power of optical amplifier in the network are computed, Finally, the maximum number of available wavelengths and the maximum number of supportable nodes in the network are also computed.