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Routing and wavelength assignment for exchanged crossed cubes on ring-topology optical networks

机译:Round和波长分配在环形拓扑光网络上交换交叉立方体

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摘要

The exchanged crossed cube, denoted by $$extit{ECQ}(s, t)$$ ECQ ( s , t ) , is a novel graph with fewer edges and smaller diameter compared to other variations of the corresponding hypercube. The ring topology, denoted by $$R_n$$ R n , is one of the most popular topologies in Wavelength division multiplexing optical networks. This paper addresses the routing and wavelength assignment problem for realizing $$extit{ECQ}(s, t)$$ ECQ ( s , t ) communication pattern on $$R_n$$ R n , where $$n=s+t+1$$ n = s + t + 1 . We propose an embedding scheme. Base on the embedding scheme, a wavelength assignment algorithm using $$2^{s+t-2}+lfloor 2^t/3floor $$ 2 s + t - 2 + ? 2 t / 3 ? wavelengths is devised. We show that the wavelength assignment algorithm uses no more than 1.25 times of wavelengths compared to the optimal wavelength number, i.e., it is a factor 1.25 approximation algorithm. Moreover, the number of additional required wavelengths is no more than $$lfloor 2^{t-1}/3floor $$ ? 2 t - 1 / 3 ? .
机译:由$$ texit {eCQ}表示的交换式多维数据集是一种新的图形,与相应的超立方体的其他变体相比,具有更少的边缘和更小的直径。环形拓扑,由$$ r_n $$ r n表示,是波分复用光网络中最受欢迎的拓扑之一。本文解决了实现$$ texit {eCQ}(s,t)$$ r_n $$ r n的$$ ecq(s,t)通信模式的路由和波长分配问题,其中$$ n = s + t + 1 $$ n = s + t + 1。我们提出了嵌入式计划。基于嵌入方案,使用$$ 2 ^ {s + t-2} + lfloor 2 ^ t / 3 rfloor $$ 2 s + t - 2 +的波长分配算法2 T / 3?波长设计。与最佳波长数相比,我们示出了波长分配算法使用不超过1.25倍的波长倍。即,它是一个因子1.25近似算法。此外,额外的所需波长的数量不超过$$ lfloor 2 ^ {t-1} / 3 rfloor $$? 2 T - 1/3? 。

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