A SDN joint routing selection and resource allocation method based on network slicing

Abstract

The invention relates to a network slicing based SDN joint routing and resource allocation method, and belongs to the technical field of communication networks. The method includes step S1 of receiving a user stream transmission request by an SDN controller; step S2 of determining, by a controller, a candidate switch set and a candidate link set according to a user stream resource requirement; step S3 of modeling a network slicing and a resource allocation identifier; step S4 of determining network slicing and the resource allocation limiting conditions; step S5 of modeling user stream end-to-end delay and a network load; step S6 of optimizing and determining a network slicing strategy for each user stream with the minimization of the user stream end-to-end delay and the network load as the goal; step S7 of determining whether each network slice has a shared switch and a shared link; step S9 of sending, by the controller, the network slicing and resource allocation strategy to the corresponding switch, and causing each switch to complete user stream routing and resource allocation according to a stream table. According to the method, the optimization of the SDN joint routing and resource allocation is achieved with user stream end-to-end delay and network load minimization as the goal.

Description

Technical field [0001] The present invention belongs to the technical field of communication networks, and involves a network slice based SDN combined route selection and resource allocation method. Background technique [0002] Software DefinedNetwork (SDN) is an emerging software-based network architecture and technology that can be applied to a network with large, isomerization. The main feature of the SDN is that the control plane is separated from the data plane, logically centralizedly controlling the network, and the flexible and efficient network management and operation maintenance is achieved through software programming. SDN separates the control plane and data planes, and the network control function can realize the logical concentration, which greatly simplifies the management and control of routing; uses open application programming interface control, which can effectively shorten service time service time, improve network resources Utilization. [0003] In order to...

AI Technical Summary

Problems solved by technology

Although SDN and network slicing can significantly improve network service support capabilities, the complex network architecture, heterogeneous integration of network forwarding equipment, and diverse service requirements in SDN networks have brought new problems and challenges to the routing mechanism and network resource allocation. challenge

[0004] The literature [Alba Xifra Porxas, Shih-Chun Liny, and Min Luo.QoS-AwareVirtualization-Enabled Routing in Software-Defined Networks (ICC), 2015] proposes a multi-tenant management architecture in an SDN network, through tenant isolation, prioritization and traffic distribution to meet the user's QoS requirements, but this document does not consider the network load problem, which may cause some nodes or links to be overloaded

The literature [Su Xin, Zhang Li, Gong Jinjin, etc., a user service request selection method based on end-to-end network slicing, CN106210042A, 2016] proposes a user service request selection method for end-to-end network slicing. Users authenticate and authorize, and match appropriate network slices to respond to user requests, but this method does not consider the resource allocation ratio when multiple users share physical resources

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