Software defined network energy efficient algorithm based on degree sequence of nodes

With the rapid development, Software defined network (SDN) is facing lots of new challenges, in which the problem of energy consumption is particularly prominent.Scholars have put many solutions to save energy consumption. However, most of the existing solutions have some shortages such as needing real-time traffic data, not easy to deploy, the Network connectivity dislocation. etc; so, An Software Defined Network Energy Efficient Algorithm based on degree sequence of nodes is proposed.This method uses the node degree sequence of SDN network topology to select dormant link for saving energy, which relies on network topology, without traffic data. At the same time, the algorithm have threshold value of algebraic connectivity during operation. It can get better energy-saving and against the decline of connectivity network without complex calculation. The experiment results show that the SDNEEA algorithm can actualize 36.7% energy saving in NSFNET and 33.1% in Abilene without complicated calculation cost, and keep Network connectivity, which provides an efficient solution for energy saving of SDN network deployment.