Optimal design and evaluation of survivable WDM transport networks
Optimal design and evaluation of survivable WDM transport networks
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DOI：
10.1109/49.725189
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发表时间：
1998-09
期刊：
影响因子：
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通讯作者：
Y. Miyao;H. Saito
中科院分区：
文献类型：
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作者：
Y. Miyao;H. Saito
提出了一种抗毁波分复用(WDM)传送网的优化设计方案，该方案使用与故障位置无关且与工作路径一一对应的预定恢复路径来实现快速恢复。基于整数规划的设计问题被用来最优地确定工作路径及其对应的恢复路径、每个跨度中的光纤数量以及每个节点中的光交叉连接(OXC)数量。在这些优化问题中，不仅包括输电费用而且还包括交叉连接的总设施费用是最小的。该设计方案可以处理空闲资源和若干参数的专用/共享分配，例如每根光纤的最大可用波长数/SPL Omega/、每个OXC的矩阵大小以及与传输成本系数比/SPL Gamma/的交叉连接。根据针对这些选项和参数所获得的设计结果来评估总光纤长度、OXC总数等。数值例子表明，总光纤长度和OXC总数对/SPL Gamma/的依赖性相对较小，并且在专用和共享情况下，对于/SPL Gamma/和/SPL Omega/的每个组合，交叉连接到传输成本比(/SPL Gamma/乘以OXC总数除以总光纤长度)几乎相同。
This paper proposes an optimal design scheme for survivable wavelength-division multiplexing (WDM) transport networks in which fast restoration can be achieved by using predetermined restoration paths that are independent of failure locations and which have one to one correspondence with working paths. Integer programming-based design problems are formulated to optimally determine working and their corresponding restoration paths, the number of fibers in each span, and the number of optical cross connects (OXCs) in each node. In these optimization problems, total facility cost, which includes not only transmission cost but also cross connection, is minimized. This design scheme can handle the dedicated/shared allocation of spare resources and several parameters, such as the maximum available number of wavelengths per fiber /spl Omega/, the matrix size of each OXC, and cross-connection to transmission cost-coefficient ratio /spl gamma/. Total fiber length, the total number of OXCs, etc., are evaluated from obtained design results for these options and parameters. Numerical examples show that the dependency of total fiber length and the total number of OXCs on /spl gamma/ is relatively small, and cross-connection to transmission cost ratios (/spl gamma/ times the total number of OXCs divided by total fiber length) in the dedicated and shared cases are almost the same for each combination of /spl gamma/ and /spl Omega/.