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中文摘要：
在低负载时断开网络拓扑部分链路是IP over WDM光网络中一种有效的节能方法,但链路断开时段的选择对IP over WDM光网络的阻塞率和节能效果有较大的影响,对此,根据网络中IP流量一天中的周期性变化规律,设计了一种链路能效分时控制策略调整非峰值时间段网络拓扑连接关系,并建立整数线性规划能耗模型,设计了便于求解模型的启发式算法.仿真结果表明,与无链路断开的原始策略相比,所提策略能有效降低网络能耗;与现有的链路断开策略相比,新策略能获得更低的网络请求阻塞率.
英文摘要：
Development of networks is restricted by energy consumption. Shutting down part links is an effective energy-saving method for Internet protocol over wavelength division multiplexing（ IP over WDM）networks during the period of low traffic requests. Optimization of link-off period is of great influence on the blocking probability and energy-saving effection for IP over WDM networks. According to one-day change of IP traffic requests,an energy efficiency strategy of link time-interval control（ SLTIC） was proposed to change the connection state of network topology during off-peak hours. An integer linear programming（ ILP） optimization model was derived to optimize the network energy consumption. And a heuristic algorithm was designed to solve the model. Simulation shows that,compared with the original algorithm without link shut,the proposed strategy can decrease the energy consumption effectively. Meanwhile,compared with switch on / off multiple links（ SOFM）,the proposed SLTIC can achieve a lower request blocking probability.
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