Energy-saving control method for wireless access points in WLAN on the basis of software defined networking

Abstract

The invention relates to an energy-saving control method for wireless access points in a WLAN on the basis of a software defined networking (SDN) and belongs to the field of WLAN communication. The method comprises steps of: sensing the WLAN by using a SDN controller and establishing an AP_List information table; clustering all APs according to RSSI information, monitored by the APs, of a client; and comparing the connected terminal amount AP_num, the flow density AP_traffic of the AP in each cluster with preset threshold respectively, closing the AP if the AP_num is less than or equal to N_Threshold1 and the AP_traffic is less than T_Threshold; or comparing the connected terminal amount AP_num of the AP in each cluster with preset threshold N_Threshold2, the AP_num is greater than the N_Threshold2 and closed AP exists in the cluster, adaptively starting the closed AP. The method may save energy, reduces an influence on client communication quality to the utmost extent, and improve the access of a terminal.

Description

Technical field [0001] The invention belongs to the field of communication technology, and particularly relates to an AP energy saving method in a WLAN based on SDN. Background technique [0002] Software Defined Networking (SDN) is a new type of network innovation architecture proposed by the Stanford University research group. Its core technology, OpenFlow, separates the control plane and data plane of network devices, thereby realizing the flexibility of network traffic. control. The SDN controller can centrally manage network devices within a certain range, so that the design, deployment, operation and maintenance, and management of the network can be completed in one control node. [0003] With the rapid development of the mobile Internet and the rapid growth of data traffic, the wireless local area network WLAN based on the 802.11 series of standards, as a low-cost and high-efficiency traffic carrying solution, has received great attention and support from the industry. The...

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Problems solved by technology

[0009] However, the existing energy-saving methods in WLAN have the following problems: (1) when the AP is in the active state and the dormant state, the energy consumption in the two states is approximately equal, and the energy-saving effect is not good; (2) Karina Gomez actually measured the AP in the air. The energy consumption under the three states of load, load, and full load draws the conclusion that only turning off the AP can save energy

Therefore, reducing the packet sending rate by adjusting the Beacon frame interval time does not substantially reduce energy consumption; (3) The information reflected by the spatial geometric distance of the AP is very rough, and the clustering using the RSSI of mutual monitoring between APs does not From the perspective of the terminal, it has a great impact on the communication quality of the terminal

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