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. 28, 2011
Filed:
Nov. 13, 2003
Boaz Carmeli, Koranit, IL;
John J Duigenan, Bournemouth, GB;
Gidon Gershinsky, Haifa, IL;
Stephen J Todd, Winchester, GB;
Graham D Wallis, West Wellow, GB;
Boaz Carmeli, Koranit, IL;
John J Duigenan, Bournemouth, GB;
Gidon Gershinsky, Haifa, IL;
Stephen J Todd, Winchester, GB;
Graham D Wallis, West Wellow, GB;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A variety of techniques are disclosed for efficient liveness monitoring in a reliable publish/subscribe multicast system having at least one broker and at least one subscriber, by: at the broker, sending () a status request message to the subscriber, and at the subscriber, sending () a status response message to the broker to indicate liveness. Status responses by subscribers may be suppressed when at least a chosen minimum number (>=1) of subscribers send a response. This suppression (-) uses a system of 'response claim' messages and random back-off timers. These provide the advantage that the efficiency of network usage is improved by reducing the number of unwanted packets that are sent.