Multi-objective Optimization Method Based on Reinforcement Learning in Multi-domain SFC Deployment

With the development of network virtualization technology,the deployment of service function chain in multi-domain network brings new challenges to the optimization of service function chain.The traditional deployment method usually optimizes a single target,which is not suitable for multi-objective optimization,and cannot measure and balance the weight among optimization targets.Therefore,in order to optimize the delay,network load balancing and acceptance rate of large-scale service function chain deployment requests synchronously,a data normalization processing scheme is proposed,and a two-step SFC deployment algorithm based on reinforcement learning is designed.The algorithm takes transmission delay and load balancing as feedback parameters and balances the weight relationship between them,and the SFC acceptance rate is optimized by using reinforcement learning framework simultaneously.The experimental results show that,the delay of the algorithm is reduced by 71.8% compared with LASP method,the acceptance rate is increased by 4.6% compared with MDSP method,and the average load balancing is increased by 39.1% compared with GREEDY method under the large-scale requests.The multi-objective optimization effect is guaranteed.