US 7,515,573 B2
Method, system and apparatus for creating an active client list to support layer 3 roaming in wireless local area networks (WLANS)
Zeljko Bajic, San Jose, Calif. (US)
Assigned to Symbol Technologies, Inc., Holtsville, N.Y. (US)
Filed on Apr. 27, 2005, as Appl. No. 11/116,660.
Prior Publication US 2006/0245404 A1, Nov. 02, 2006
Int. Cl. H04L 12/56 (2006.01)
U.S. Cl. 370—338  [370/389] 20 Claims
OG exemplary drawing
 
1. A method for providing an active mobile communication device list to a plurality of wireless switches in a wireless local area network comprising a registration server, a plurality of active mobile communication devices, a plurality of access ports, and the plurality of wireless switches, comprising:
communicating registration information associated with each of the active mobile communication devices from corresponding access ports associated with the mobile communication devices to the wireless switches that support those active mobile communication devices;
communicating the registration information associated with each of the active mobile communication devices from the wireless switches over an IP tunnel to the registration server;
creating the active mobile communication device list at the registration server using the registration information for each active mobile communication device of each of the wireless switches, wherein the active mobile communication device list comprises a record for each active mobile communication device in the wireless local area network, wherein each record comprises registration information for a particular one of the active mobile communication devices, and wherein the record of each mobile communication device comprises a MAC address of the mobile communication device, a mobile communication device IP address of the mobile communication device, a home wireless switch of the mobile communication device, and a visited wireless switch of the mobile communication device; and
communicating the active mobile communication device list from the registration server to each of the wireless switches so that each of the wireless switches has a record for each active mobile communication device in the wireless local area network.