Wireless access control method and device for software defined network (SDN)

Abstract

The invention relates to a wireless access control method and device for a software defined network (SDN) and belongs to the field of mobile communication technology. According to the method, a controller has wireless access to a control module to obtain the status of a mobile terminal (MT), QoS requirements of the MT, the status of APs and network resource status information according to an access request message of the MT; candidate APs are determined according to factors such as the QoS requirements of the MT and the moving direction, and if multiple candidate APs exist, the AP with the highest signal intensity is selected as a target AP; the target AP accepts / rejects an MT access request. According to the wireless access control method and device for the SDN, the QoS requirements of the MT, status information of the MT and the APs, an SDN architecture and other characteristics are considered comprehensively, MT access control under the wireless SDN architecture is achieved; according to the scheme, the QoS satisfaction degree of the MT is effectively improved, MT access delay is shortened, MT access AP signal stabilization is guaranteed, and network stability is improved.

Description

Technical field [0001] The invention belongs to the field of mobile communication technology, and relates to a wireless access control method and equipment for a software-defined network. Background technique [0002] Software Defined Networks (SDN) is a new innovative network platform based on OpenFlow proposed by Stanford University. The typical architecture of SDN is divided into three layers. The top layer is the application layer, which includes various services and applications; the middle layer is the control layer, which is mainly responsible for the arrangement of data forwarding equipment resources, and maintenance of network topology and status information; the bottom layer As the data layer, it is mainly responsible for data processing, forwarding and state collection based on the flow table. The main features of SDN are separation of control plane and data plane, centralized network control, open network interface between the control layer and data layer equipment, ...

AI Technical Summary

Problems solved by technology

This method does not consider indicators such as user QoS requirements, network resource status, and AP signal strength, and cannot achieve the best target AP selection.

The literature [C.Guimaraes, Corujo D, Aguiar R L, etal. Empowering Software Defined Wireless Networks Through Media Independent Handover Management. Globecom, 2013] proposed a SDN wireless network architecture based on Media Independent Handover (MIH), This architecture introduces the MIH module in the controller, data exchange equipment and mobile node to realize the handover of the mobile node between heterogeneous networks, but this scheme does not consider the access network selection mechanism

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