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:
Mar. 31, 2009
Filed:
Apr. 06, 2005
Julius Karlsson, Helsinki, FI;
Julius Karlsson, Helsinki, FI;
Nokia Corporation, Espoo, FI;
Abstract
A method for recovering state information of a first tunnel endpoint of a point to point connection between the first tunnel endpoint and a second tunnel endpoint, the state information comprising a first state variable comprising a sequence number for sent messages and a second state variable comprising a sequence number for received messages. The method comprises detecting a crash of the first tunnel endpoint with a backup tunnel endpoint of the first tunnel endpoint, sending, from the backup tunnel endpoint, at least one request message to the second tunnel endpoint, and recovering the first state variable and the second state variable of the first tunnel endpoint based on the state variables present in at least one response message from the second tunnel endpoint.