Fast duplicate address detection entity for managing...

Details Fast duplicate address detection entity for managing... Fast duplicate address detection entity for managing...

2007-08-21

2007-08-21

Cumming, William D. (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S338000

Reexamination Certificate

active

10916463

ABSTRACT:
A fast Duplicate Address Detection (DAD) Entity in a distribution system including multiple Access Points and multiple mobile nodes associated therewith. The fast DAD entity includes a memory unit for storing an address table recording information including IP addresses of the multiple mobile nodes; an interface unit for receiving Neighbor Solicitation messages that includes an IP address from a mobile node newly associated with the distribution system; a record unit for extracting the IP address of new mobile node from the Neighbor Solicitation messages, and recording the IP address in the address table; a search unit for searching the IP addresses of the multiple mobile nodes stored in the address table; a decision unit for comparing the IP address of the new mobile node with the IP addresses of the multiple mobile nodes already configured with the sub-network, and deciding whether there already present the same IP address; and a control unit for generating a response message notifying that the IP address of the new mobile node is confirmed as unique and can be used as new Care-of Address (CoA), and sending the response message to the new mobile node through the interface unit, if there does not exist the same IP address as a result of the decision of the decision unit.

REFERENCES:
patent: 6947401 (2005-09-01), El-Malki et al.
patent: 2001/0046223 (2001-11-01), Malki et al.
patent: 2005/0036471 (2005-02-01), Singh et al.

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