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US Patent 7443851 Device and system for multicast communication

Patent 7443851 was granted and assigned to Hitachi on October, 2008 by the United States Patent and Trademark Office.

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Patent
Patent

Patent attributes

Current Assignee
Hitachi
Hitachi
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
Patent Number
7443851
Date of Patent
October 28, 2008
Patent Application Number
10364450
Date Filed
February 10, 2003
Patent Primary Examiner
‌
Wing F Chan
Patent abstract

A multicast communication device receives data packets multicast for receiving terminals which terminals do not support multicast communication and that are requesting multicast data packets. The multicast communication device then forwards the data packets to the receiving terminals. Communication from the receiving terminal accessing the sending terminal sending data packets to obtain information is monitored. Based on the access contents, a join group request is issued for the group address used by the multicast delivery. The multicast communication device stores service information such as the address of the sending terminal and the destination address of data packets sent by the sending terminal. If the service to be accessed by the receiving terminal is present, multicast delivery of data packets is requested. The multicast communication device forwards received multicast data packets to the receiving terminal.

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