The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2009
Filed:
May. 03, 2004
Ahmad Muhanna, Richardson, TX (US);
Pete Wenzel, Plano, TX (US);
Pierre Boulos, Richardson, TX (US);
Ahmad Muhanna, Richardson, TX (US);
Pete Wenzel, Plano, TX (US);
Pierre Boulos, Richardson, TX (US);
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
The present invention supports an authentication protocol on a foreign agent to avoid rejecting re-registration request when congestion has delayed receipt at a mobile node of a foreign agent challenge code in a registration reply or agent advertisement message. Upon receipt of a re-registration request message containing a stale foreign agent challenge code, the identification code of the re-registration request message is compared to the identification code of the previous valid registration request message. If the identification code is greater than and not equal to the identification code in the previous valid request message, the foreign agent authenticates the message. The authenticated registration request message is processed to reset the lifetime so the communication session can continue.