In order to solve the problem of load imbalance caused by the changing topology and real-time changes of service requests in SDN/NFV cooperative deployment satellite networks, the load balancing optimization algorithm...
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ISBN:
(纸本)9781728140346
In order to solve the problem of load imbalance caused by the changing topology and real-time changes of service requests in SDN/NFV cooperative deployment satellite networks, the load balancing optimization algorithm based on viterbialgorithm for minimum migration cost (mlb-viterbi) is proposed. This method establishes the mapping process of SFC as a hidden Markov model. Considering the migration cost and the constraints in migration, the mlb-viterbi algorithm is used to migrate the VNF resources of the overloaded nodes to other suitable nodes and adds a migration cost function to the state transition matrix, so as to multi-objective optimization. The results show that mlb-viterbi algorithm has better convergence than MRLB algorithm in load balancing performance. With the increase of the number of reconstructed service chains, mlb-viterbi algorithm has more advantages than multi-steps in the cost of migration. The cost of updating the service chain depends on the number of service chains in a linear way. The algorithm can effectively achieve load balancing and ensures the minimum migration cost.
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