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US 2006/0215623 A1Published application
Method and apparatus for seamless roaming for wireless networks
AssigneeLucent Technologies Inc.
InventorsChueng-Hsien Lin, Sanjoy Paul, Sampath Rangarajan
Life of this patent
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Abstract
A method and apparatus for seamless roaming support for wireless networks is disclosed. The method includes broadcasting a request for a physical address of a default router related to a mobile unit; receiving the request at the default router; replying to the mobile unit; and creating an initial entry in a location table.
Claims20
A network communication system for providing seamless roaming support to mobile units on a wireless network, comprising:
- at least two access points (APs), each having a wired interface port and a wireless interface port, the wireless interface port adapted to be coupled to the mobile units;
- an access router (AR) adapted to be coupled to the wired interface port of each of the at least two APs;
- and
- a location table for providing routing information of the mobile units to the AR.
1 more element
A method for routing an IP packet toward a mobile unit, comprising:
- receiving the IP packet at an AR;
- identifying a mobile unit location using a location table, the location table containing the destination IP address of a serving AP;
- retrieving the destination IP address of the serving AP from the location table;
- and
- associating with the IP packet the IP address of the serving AP such that the IP packet is adapted for transmission to the mobile unit via the serving AP.
2 more elements
A method for communicating between a mobile unit and a host, comprising:
- providing a probing signal from the mobile unit to locate nearby APs;
- processing responses from nearby APs;
- associating with the selected serving AP;
- broadcasting an ARP message for an IPvdr address, wherein a response is sent to the ARP for the IPvdr address of the mobile unit;
- sending a first message to the AR;
- and
- processing the ARP response and creating an ARP cache entry, wherein the first message is used to create an initial routing entry in a location table.
4 more elements
Dependencies are inferred from the claim text.