Bee Colony Algorithm Optimization Based on Link Cost for Routing and Wavelength Assignment in Satellite Optical Networks
Bee Colony Algorithm Optimization Based on Link Cost for Routing and Wavelength Assignment in Satellite Optical Networks
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DOI：
10.1587/transcom.2019ebp3097
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发表时间：
2020-06
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影响因子：
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通讯作者：
Yeqi Liu;Qi Zhang;X. Xin;Qinghua Tian;Ying Tao;Naijin Liu;Kai Lv
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作者：
Yeqi Liu;Qi Zhang;X. Xin;Qinghua Tian;Ying Tao;Naijin Liu;Kai Lv
现代通信的快速发展对卫星光网络中的路由和波长分配（RWA）问题提出了更高的要求。本文针对由星间激光链路组成的卫星网络，提出了基于链路代价的蜂群算法RWA（BCO-LCRWA）。在BCO-LCRWA中，基于网络传输性能指标（时延和波长利用率），以多普勒波长漂移、传输时延、波长一致性和连续性为约束条件，建立了星间激光链路的成本模型。该算法利用蜂群适应度函数，综合考虑了波长资源利用率和通信跳数，实现了波长的有效利用，避免了不必要的过迂回，保证了系统的误码率性能。仿真结果证实了改进的性能相比，现有的替代品所提出的算法。
SUMMARY Rapid development of modern communications has initiated essential requirements for providing efficient algorithms that can solve the routing and wavelength assignment (RWA) problem in satellite optical networks. Inthispaper, thebeecolonyalgorithmoptimizationbasedonlink cost for RWA (BCO-LCRWA) is tailored for satellite networks composed of intersatellite laser links. In BCO-LCRWA, a cost model of intersatel-lite laser links is established based on metrics of network transmission performance namely delay and wavelengths utilization, with constraints of Doppler wavelength drift, transmission delay, wavelength consistency and continuity. Specifically, the fitness function of bee colony exploited in the proposed algorithm takes wavelength resources utilization and communication hops into account to implement effective utilization of wavelengths, to avoid unnecessary over-detouring and ensure bit error rate (BER) performance of the system. The simulation results corroborate the improved performance of the proposed algorithm compared with the existing alternatives.