Patent ID: 7630311
Filing Date: 2009-12-08
Classification: H04L,H04W,Y02D

Abstract:
1. A wireless LAN (Local Access Network) distribution system, which forwards data received from a correspondent node to a destination station among a plurality of stations respectively connected to a plurality of access points, the wireless LAN distribution system comprising: a location management server for storing and managing a mapping table as an information table storing IP (Internet Protocol) addresses of the plurality of stations and physical access control addresses of the plurality of access points having the stations located therein, the location management server to identify an access point connected to the destination station to cause only the identified access point, from the plurality of access points, to perform an IP address check of the stations located in the area of the identified access point; and an edge router for, upon receiving the data from the correspondent node via a communication network, forwarding the received data to the location management server, wherein the location management server identifies the access point connected to the destination station, among the plurality of access points, by checking the IP address of the destination station in the information table, forwards the received data to the identified access point by using the IP address of the destination station and the physical access address of the identified access point, such that the identified access point forwards the received data to the destination station by using the IP address of the destination station; generates an acknowledgment (Ack) message in response to receiving association information of the identified access point subsequent to updating the information table with the association information regarding a station within the area of the identified access point, and sends the generated Ack message to the identified access point; and the location management server including a MAC (Media Access Control) frame generator for generating a MAC frame destined for the identified access point having the destination station located therein.