Power control adopting cross-layer optimization has the advantages of developing present resources efficiently and improving the network performance.

在功率控制中引入跨层优化的机制，可以有效地开发现有资源，提高网络性能。

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Software-defined networks will provide some of this flexibility by separating the control function from data forwarding, but there are additional capabilities emerging, he says, such as intelligent switching of wavelengths, the ability to mix dedicated bandwidth with best-efforts networks, and application layer network traffic optimization, e.g.

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