基于SDN的动态负载均衡策略.

To solve the problem of controller load imbalance caused by static network structure can't adapt to the dynamic change of traffic in software defined networking, this paper proposed a stage dynamic controller load balancing strategy ( SDCLB). In phase one, it determined the candidate set of immigration controller with the aim of load equalization, and considered the delay and loaded comprehensively, designed index function to determine the switch to be migrated. In phase two, it considered the connectivity of network nodes, proposed an improved EMD model with minimum migration cost and used the linear approximation algorithm to solve it quickly. The method realized the fast parallel migration of switches. Results show that compared with the existing load balancing strategy, this strategy improves the process of selecting immigration controllers and switches, and optimizes network performance. The load balancing degree of this strategy increases by about 31. 4 % [ABSTRACT FROM AUTHOR]