Wireless local area network system control method for a multicast service transmission, apparatus and system for

The present invention provides a multicast service transmission control method, apparatus and system for a wireless LAN system, the wireless LAN system comprising a wireless LAN controller, and a plurality of wireless LAN access point controlled, the wireless LAN controller WLAN access point configuration control multicast service, wireless LAN access points according to the local Ethernet data frame is configured to request and receive the multicast mode Ethernet data frame, the wireless LAN access point to the received group Ethernet multicast frames converted into a format suitable for a data frame received by the wireless LAN client and transmitted. The present invention can effectively save network bandwidth resources, saving the cost of deployment of a wireless local area network.