弹性光网络中防止请求阻塞的物理层感知电路重分配

Selles Araújo, Jurandir C. Lacerda, Alexandre C. Fontinele, E. Leão, José V. dos Reis Júnior, A. Soares
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引用次数: 0

摘要

本文提出了一种考虑物理层影响的透明弹性光网络电路再分配算法,称为单路再分配(Just One circuit relocation, JOC)。JOC算法只重新分配一个已经建立的电路,以避免由于物理层的损伤而阻塞新的电路请求。将JOC算法的结果与其他三种算法进行了比较:电路重新分配策略物理层(CRS-PL)、电路QoT相关的块减少电路重新分配(R-RQoT)和Make-Before-Break (MBBr)。在带宽阻塞概率(BBP)、电路阻塞概率(CBP)和重分配电路数量(NRC)下对美国和EON拓扑的重分配算法进行了评估。此外,我们还评估了使用完全共享、k -最短路径计算、改进Dijkstra路径计算和k -最短路径的重分配算法的性能,并将QoTO降为路由和频谱分配。仿真结果表明,该算法在BBP、PBC和NRC方面均优于CRS-PL、R-RQoT和MBBr算法。在BBP方面,我们的算法分别为美国和EON拓扑提供了大约65.36%和55.6%的最小降低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physical Layer-Aware Circuit Reallocation to Prevent Request Blocking in Elastic Optical Networks
This paper proposes a new circuit reallocation algorithm that considers the effects of physical layer in transparent elastic optical networks, called Just One Circuit Reallocation (JOC).The JOC algorithm reallocates just one already established circuit to avoid the blocking of new circuit request due to impairments in the physical layer. The results of the JOC algorithm were compared to three other algorithms: Circuit Reallocation Strategy Physical Layer (CRS-PL), Circuit Reallocation for Block Reduction related to the QoT of the circuits (R-RQoT) and Make-Before-Break (MBBr). The reallocation algorithms are evaluated under the bandwidth blocking probability (BBP), circuit blocking probability (CBP) and the number of reallocated circuits (NRC) for USA and EON topologies. Besides, we also evaluated the performance of reallocation algorithms using Complete Sharing, K-Shortest Path Computation, Modified Dijkstra Paths Computation and K-Shortest Path with Reduction of QoTO to routing and spectrum assignment. Simulation results show that the proposed algorithm exhibits better performance than the CRS-PL, R-RQoT and MBBr algorithms with regard to BBP, PBC and NRC. In terms of BBP, our algorithm presented minimum reductions of approximately 65.36% e 55.6% for the USA and EON topology, respectively.
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