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:
May. 04, 2010
Filed:
Nov. 30, 2005
Teruyuki Hasegawa, Fujimino, JP;
Toru Hasegawa, Fujimino, JP;
Teruyuki Hasegawa, Fujimino, JP;
Toru Hasegawa, Fujimino, JP;
KDDI Corporation, Tokyo, JP;
Abstract
A communication system includes a probe transmission serverwhich transmits at fixed intervals of time a probe multicast packet distributed along the same path as a main multicast packet, a delay insertion serverwhich appends the same fixed delay time to each of the main multicast packet and the probe multicast packet, a backup serverwhich generates synchronism and delay backup multicast packets from the main multicast packet and transmits them, and a communication control devicewhich determines the communication of the main multicast packet based on a reception interval of the probe multicast packet, generates a backup main multicast packet from the backup multicast packet when a communication break is detected, and transmits it. The communication system, upon implementing a broadcast-type multicast service, enhances compensation of communication breaks when detecting and recovering from a fault in an IP network, and reduces the network traffic.