星载并行波长Clos网络

Onboard Parallel Wavelength Clos-network

针对天基光网节点的高移动性特点和高可靠性需求,提出了一种并行波长Clos网络(Parallel Wavelength Clos-network,PW-Clos)以实现抵抗天基光网的链路故障和提高节点内部的可靠性。PW-Clos包括W个波长Clos网络平面,每个平面独立完成一个波长交换,其中W是天基光网具备链路故障容错能力所需的最少波长数量,可通过求解天基光网的线性规划模型获得。理论分析表明,PW-Clos网络具有与Clos网络相同的路径多样性,但实现复杂度降为O(N3/2W),其中N为节点的链路数量。

In order to satisfy high mobility and reliability of space-based optical networks,a Parallel Wavelength Clos-network(PW-Clos) is proposed to resist link faults and improve reliability of nodes.PW-Clos network consists W wavelength Clos-network planes,in each of which a wavelength switching is accomplished. The minimal number of wavelengths,W,required to resist link faults,is obtained by solving the linear programming model of optical networks. Theoretical analysis demonstrates that,the path diversity of PW-Clos network is the same as that of Clos network,while the implementation complexity of PW-Clos is reduced to O(N^3/2 W),where N is the number of links in a node.