A load balancing method, AC and system

Abstract

A load balancing method, AC and system provided by the present invention belong to the technical field of wireless communication and are applied to a wireless controller AC in a wireless network. The AC obtains its own load information and sends the load to a neighbor AC when it is determined that it is overloaded Share the request message, receive the response information sent by the neighbor AC, obtain a list of APs that establish a backup communication channel with the neighbor AC, and determine, according to the list of APs, at least one that can be used for handover to establish a primary communication channel with itself. An AP that selects the AP that needs to be switched from the at least one AP and notifies the AP that needs to be switched to switch the active communication channel to the neighbor AC; selecting the AP that needs to be switched to perform the switching realizes a reasonable relationship between ACs. Load distribution and reduce the number of frequent AP switching, ensure the stability of the network load and maintain business continuity, thereby improving the quality of network services.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a load balancing method, AC and system Background technique [0002] At present, a wireless network is generally a wireless controller (Wireless Access Point Controller, AC for short) + wireless access point (Access Point, AP for short) networking mode, AC is used to centrally control AP, AP is used to The inbound terminal provides wireless data transmission services, but as the coverage of wireless networks becomes wider and wider, maintaining network load stability and high network service quality is a key issue in wireless network applications. become a hot spot. [0003] For example, when a wireless terminal is associated with an AP with a lighter load, it can be used to offload services by implementing load balancing among APs in the wireless network, thereby maintaining the stability of the network load and improving the quality of service of the...

AI Technical Summary

Problems solved by technology

[0003] For example, when a wireless terminal associates, it looks for an AP with a lighter load to access, and realizes load balancing among APs in the wireless network to offload services so as to maintain the stability of the network load and improve the service quality of the network, even when there are a large number of When terminals are connected concurrently, since the AC is responsible for centralized management and control of each AP, even if the load balancing between APs is realized, the load on the AC will still be too heavy, resulting in a bottleneck in network access performance.

Therefore, based on the realization of the load balancing technology between ACs in the wireless network, multiple ACs are deployed in the wireless network, and the stability of the network load is maintained by realizing the load balancing between the ACs. The invention patent application publication number is CN102387539A The application document discloses a method by establishing a cluster management channel between adjacent ACs, and periodically exchanging its own load information, allowing APs to mount to ACs with lighter loads, so as to realize business offloading and achieve AC business load balancing. Purpose, but the problem with this is: First, each AC needs to periodically exchange their current load information for comparison so that the AP actively selects the AC with the lighter load for switching. In this way, when the load difference between the two ACs is not obvious As a result, APs will switch frequently; secondly, when there are many ACs in the network, there may be situations where multiple ACs with heavy loads request AP switching from the AC with the lightest load, which in turn increases the load on the AC with the lightest load. ;Furthermore, the configuration information of multiple ACs may be different, which may cause the AP to go offline or the terminal associated with the AP to go offline during the switching process, resulting in abnormal situations such as service interruption or unavailability

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