Network service function link mapping method in data center

Abstract

The invention relates to a network service function link mapping method and particularly relates to a network service function link mapping method in a data center. The method comprises the steps of starting mapping VNFs, judging whether constraint conditions are satisfied or not, and mapping the VNFs to server nodes with the same VNFs if the constraint conditions are satisfied; judging whether the server nodes satisfying resource requirements exist or not, and mapping the VNFs which do not satisfy the constraint conditions to the server nodes with the minimum selection factors if the server nodes satisfying the resource requirements exist; splitting the VNFs and mapping the split VNFs to the server nodes which satisfy a split condition if the server nodes satisfying the resource requirements do not exist; and mapping SFC links through adoption of a fit-first thought under the condition that the constraint conditions are satisfied. According to the method, a relationship between network service function link mapping energy consumption and performance in the data center is taken into comprehensive consideration, and under the condition that the energy consumption is reduced, a mapping policy with the optimal performance expression is provided.

Description

technical field [0001] The invention relates to a method for mapping network function service chains, in particular to a method for mapping network function service chains in a data center. Background technique [0002] When data packets are transmitted in the network, they often need to pass through various service nodes to ensure that the network can provide users with safe, fast and stable network services according to the design requirements. These service nodes (Service Node, SN) include well-known firewalls (FireWalls, FW), intrusion detection (Intrusion Prevention System, IPS), load balancing (Load Balancing, LB) and so on. Usually, network traffic needs to pass through these service points according to the predetermined sequence required by the service logic, in order to realize the required security service. Due to the development of Network Function Virtualization (NFV), network services can be separated from specific hardware. Therefore, network services such as...

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Problems solved by technology

[0003] Therefore, the mapping deployment of SFC is a very popular research issue now, and most of the current research does not comprehensively consider performance indicators such as energy consumption, packet acceptance rate, and fragment resource utilization. , for the purpose of using the least number of servers and switches, while ignoring the low availability caused by the mapping of NFVs in the same SFC to the same server node, the influence of traffic characteristics and order between different NFVs, and the influence of hotspot effects, The packet acceptance rate needs to be improved, and some studies do not consider the energy consumption problem for load balancing. For the split mapping of NFV, they do not consider the influence of traffic characteristics on the physical location of the split sub-service function mapping.

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