Research On The Algorithm Of Network Energy-Saving Based On Routing Protocol

Nowadays,due to energy shortages and many non-renewable resources,the international community gradually focus on the concept of energy saving.Along with the vigorous development of the Internet,the total energy consumption presents rapid growth trend,so energy saving and emission reduction of network industry is imminent.With greatly concern about how to improve the effective utilization of energy and control the electricity of network systems,researchers are committed to building green energy-saving networks.Currently,many scholars have proposed a series of energy-saving mechanisms and measures.In the perspective of the network granularity,we can classify the existing energy-saving strategies into two categories;node-level strategies,network-level strategies.From the perspective of network level,we propose the method of lightweight modification of routing protocol and the self-adaptive algorithm which allow flows gather into a part of links under the green network architecture SDN to achieve effective energy-saving,while guarantee the performance of the network and improve the shortcomings of existing energy-saving measures,such as high complexity of the algorithm,hardware improvement and the high difficulty for practical applications.The main work and achievements of this paper are as follows:1)Based on the analysis of the SPF(Shortest Path First)algorithm in OSPF(Open Shortest Path First)protocol and the energy margin of different types of routers between the idle state and the state to process the packet,we propose an energy-saving algorithm of routing protocol which considers the factor of energy consumption.By modifying the Dijkstra algorithm,routers can select the minimal total of energy margin routing path among all equivalent paths.The experimental results show that the algorithm can save a part of energy consumption in the router which uses the MECR strategy by applying to different scale networks.2)Aimed at the characteristic of the Software Defined Network(SDN),a self-adaptive energy saving routing algorithm(LAR)which based on residual bandwidth of links is presented in this paper,the proposed algorithm makes the link utilization which changing in real time as the link cost.It would obtain the topology information and link status to optimize and prune the topology for reducing the3)computing time of routing algorithm before selecting routing path.After a period of time,the incoming flows will automatically be gathered in heavily-loaded links.The links without traffic will be switched off while the whole network connectivity and QoS are guaranteed.Simulation results show that it is possible to reduce considerable energy consumption during off-peak hours.And,the algorithm has the distinct advantage in terms of complexity and network performance comparing related schemes.