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在绿色光网络中,业务传输时隙分配策略和路由选择算法很大程度上决定了光网络的传输能耗大小.针对业务持续时间的传输能耗问题,提出了一种基于灵活时间带宽预留型业务带宽可变节能调度算法.通过构造业务的调度权值矩阵,计算不同备选传输路径在不同时隙内被各个业务选择的次数,并基于贪婪算法为业务选择最小能耗的传输时隙和路径;同时,为充分利用已建光路的可用带宽,还设计了一种带宽调整策略,能根据不同时隙内光路的可用带宽调整业务的传输带宽,最小化网络中光路的数目.仿真结果表明,提出的带宽可变节能调度算法可有效地降低网络的传输能耗和业务阻塞率,提升网络的性能.
In green optical network, the service transmission slot allocation strategy and routing algorithm largely determine the transmission energy consumption of optical network.Aiming at the problem of transmission energy consumption in service duration, a new scheme based on flexible time bandwidth reservation Based on scheduling weight matrix of business, the number of times that different alternative transmission paths are selected by each service in different time slots is calculated, and the transmission time slot with the minimum energy consumption for the service is selected based on the greedy algorithm At the same time, in order to make full use of the available bandwidth of the built-in optical path, a bandwidth adjustment strategy is also designed to adjust the transmission bandwidth of the optical path according to the available bandwidth of optical paths in different time slots, and to minimize the number of optical paths in the network. It shows that the proposed variable bandwidth scheduling algorithm can effectively reduce the transmission energy consumption and service blocking rate of the network and improve the performance of the network.