国家自然科学基金(61275077,61571072)
重庆市科委自然基金(2015jcyjA40024)
[1] Bao N H, Su G J, Chen J B. Recovery-time aware hybrid path protection algorithm in optical networks. J Chongqing Univ Posts Telecommun, 2017, 29: 313--319. Google Scholar
[2] Zhou H, Mao S, Agrawal P. Optical power allocation for adaptive transmissions in wavelength-division multiplexing free space optical networks. Digital Commun Networks, 2015, 1: 171-180 CrossRef Google Scholar
[3] Zhang Z, Xiao M, Wu M. Adaptive subcarrier-distribution algorithm for routing and spectrum allocation in OFDM-based elastic optical networks. Photon Netw Commun, 2014, 28: 225-231 CrossRef Google Scholar
[4] He Z L, Liu W T, Shen B L, et al. Flexible multidimensional modulation formats based on PM-QPSK constellations for elastic optical networks. Chinese Opt Lett, 2016, 14: 20--23. Google Scholar
[5] Zhang M Y, You C S, Zhu Z Q. On the parallelization of spectrum defragmentation reconfigurations in elastic optical networks. IEEE/ACM Trans Netw, 2015, 24: 1--15. Google Scholar
[6] Wei C Y, Zhou B T, Liu H L, et al. A bandwidth-variable scheduling method of saving energy for the holding time of traffic requests. J Beijing Univ Posts Telecommun, 2016, 39: 83--86. Google Scholar
[7] Yin W, Zhang J, Zhao Y L, et al. Spectrum consecutiveness based routing and spectrum allocation in flexible bandwidth networks. Chinese Opt Lett, 2012, 25: 35--38. Google Scholar
[8] Qiu Y, Fan Z, Chan C K. Efficient routing and spectrum assignment in elastic optical networks with time scheduled traffic. Optical Fiber Tech, 2016, 30: 116-124 CrossRef ADS Google Scholar
[9] 侯洵 . Spectrum Fusion Oriented Routing and Spectrum Allocation Algorithm and Spectrum Defragmentation Algorithm. 光子学报, 2013, 42: 929-935 CrossRef Google Scholar
[10] Ye Z, Patel A N, Ji P N, et al. Distance-adaptive and fragmentation-aware optical traffic grooming in flexible grid optical networks. In: Proceedings of OptoElectronics and Communication Conference and Australian Conference on Optical Fibre Technology, Melbourne, 2014. 355--356. Google Scholar
[11] Wang C, Shen G, Peng L. Protection lightpath-based hitless spectrum defragmentation for distance adaptive elastic optical networks. Opt Express, 2016, 24: 4497-4511 CrossRef ADS Google Scholar
[12] Liu H L, Lv L, Chen Y, et al. Fragmentation-avoiding spectrum assignment strategy based on spectrum partition for elastic opt network. IEEE Photon J, 2017, 9: 7906413. Google Scholar
[13] Anoh N G, Babri M, Kora A D. An efficient hybrid protection scheme with shared/dedicated backup paths on elastic optical networks. Digital Commun Networks, 2017, 3: 11-18 CrossRef Google Scholar
[14] Wang N, Jue J P. Holding-time-aware routing, modulation, and spectrum assignment for elastic optical networks. In: Proceedings of Global Communications Conference, Austin, 2014. 2180--2185. Google Scholar
[15] Liu H, Yin Y, Chen Y. Energy-efficient multicast traffic grooming strategy based on light-tree splitting for elastic optical networks. Optical Fiber Tech, 2017, 36: 374-381 CrossRef ADS Google Scholar
[16] Wang B, Ho P H. Energy-Efficient Routing and Bandwidth Allocation in OFDM-Based Optical Networks. J Opt Commun Netw, 2016, 8: 71-84 CrossRef Google Scholar
[17] Sun Y, Shen J H. An energy aware routing and spectrum assignment algorithm for elastic optical networks. Study Opt Commun, 2015, 41: 11--13. Google Scholar
[18] Chatterjee B C, Sarma N, Oki E. Routing and Spectrum Allocation in Elastic Optical Networks: A Tutorial. IEEE Commun Surv Tutorials, 2015, 17: 1776-1800 CrossRef Google Scholar
[19] Fallahpour A, Beyranvand H, Nezamalhosseini S A. Energy Efficient Routing and Spectrum Assignment With Regenerator Placement in Elastic Optical Networks. J Lightwave Technol, 2014, 32: 2019-2027 CrossRef ADS Google Scholar
[20] Fallahpour A, Beyranvand H, Salehi J A. Energy-Efficient Manycast Routing and Spectrum Assignment in Elastic Optical Networks for Cloud Computing Environment. J Lightwave Technol, 2015, 33: 4008-4018 CrossRef ADS Google Scholar
[21] Zhang J, Zhao Y, Yu X. Energy-Efficient Traffic Grooming in Sliceable-Transponder-Equipped IP-Over-Elastic Optical Networks [Invited]. J Opt Commun Netw, 2015, 7: A142-152 CrossRef Google Scholar
Figure 1
Examples of spectrum utilization, (a) without holding times information; (b) with holding times information
Figure 2
(Color online) Spectrum coherence degree calculation. (a) Physical topology; (b) spectrum allocation
Figure 3
Network topologies for verifying algorithms' performance. (a) NSFNET; (b) USNET
Figure 4
(Color online) Comparison of bandwidth blocking rates in different network topologies. (a) NSFNET;protect łinebreak (b) USNET
Figure 5
(Color online) Comparison of bandwidth utilization rates in different network topologies. (a) NSFNET;protect łinebreak (b) USNET
Figure 6
(Color online) Comparison of energy efficiency in different network topologies. (a) NSFNET; (b) USNET
| Serve | Request FSs | Route paths |
| $R1$ | 2 FSs | L1, L2 |
| $R2$ | 2 FSs | L1, L2, L3 |
| $R3$ | 1 FSs | L2, L3 |
| $R4$ | 2 FSs | L3 |
| $R5$ | 1 FSs | L1, L2 |
| Modulation format | Modulation level | Transmission rate (Gb/s) | Power consumption (W) |
| BPSK | 1 | 12.5 | 112.374 |
| QPSK | 2 | 25 | 133.416 |
| 8QAM | 3 | 37.5 | 154.457 |
| 16QAM | 4 | 50 | 175.498 |
Download PDF
