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- Title
基于频谱切片的弹性光网络中可调度请求资源分配算法.
- Authors
刘焕淋; 谭明明; 任杰; 陈勇; 邱艳; 胡俊岭
- Abstract
Aiming at the problem that schedulable requests that determine the characteristics of service start time and end time increase the resource fragmentation rate and bandwidth blocking rate of resilient optical networks, a node architecture for resilient optical networks with spectrum slicers is designed, and a routing spectrum and time allocation algorithm based on spectrum-slicing is designed (SS-RSTA). In the routing selection phase of SS-RSTA, a path weight value-based routing strategy is proposed, which integrates path length, path fragmentation probability, and the number of available spectrum slicers at nodes. The route with the most path weight value is selected for the demand. In the resource allocation phase of SS-RSTA, the available spectrum, and time resources windows are selected for the scheduled lightpath demands by using link resource fragmentation-aware approach. When the resource allocation fails, the spectrum-slicing criterion is used to slice the scheduled lightpath demand into multiple sub-bandwidth requests to increase the probability of successful spectrum allocation for scheduled lightpath demands and improve the utilization of spectrum time fragmentation. Simulation results show that the proposed algorithm can reduce the bandwidth blocking probability of networks and enhance the resource utilization of networks.
- Subjects
BANDWIDTH allocation; SPECTRUM allocation; TIME management; RESOURCE allocation; OPTICAL spectra; BANDWIDTHS; QUEUEING networks
- Publication
Journal of Chongqing University of Posts & Telecommunications (Natural Science Edition), 2023, Vol 35, Issue 2, p286
- ISSN
1673-825X
- Publication type
Article
- DOI
10.3979/j.issn.1673-825X.202201050007