在面向多播业务的以太无源光网络中引入光网络单元混合休眠模式,提出面向多播业务的节能算法和改进的面向多播业务的节能算法,使光网络单元空闲组件能够得到充分休眠,并通过约束条件降低光网络单元的唤醒次数,从而降低光网络单元能耗.改进的面向多播业务的算法与面向多播业务的算法相比,增加了光网络单元唤醒的约束条件,进一步降低了光网络单元的唤醒次数.仿真结果表明,与现有算法相比,所提算法在保证数据包时延的前提下更加节能.改进的面向多播业务的算法节能效果优于面向多播业务的算法,表明增加的约束条件有助于降低光网络单元的唤醒次数和能耗.

The hybrid sleep mode of optical network unit was introduced into ethernet passive optical network for multicast traffic, and the energy saving algorithm for multicast traffic and improved energy saving algorithm for multicast traffic were proposed. The two algorithms sleep the idle components of optical network units and reduce the wakeup times of optical network units by constraints, so that the energy consumption of optical network units can be reduced. Compared with energy saving algorithms for multicast traffic, the improved energy saving algorithms for multicast traffic adds a constraint for optical network units wakeup, so reduces the wakeup times of optical network units further. Simulation results show that, the two proposed algorithms save more energy than the previous algorithm with guaranteed packet delay. Moreover, the improved energy saving algorithms for multicast traffic saves more energy than energy saving algorithms for multicast traffic, which shows that the adding constraint contributes to the reduction of the wakeup times and the energy consumption of optical network units.