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:
Aug. 03, 2010
Filed:
Jun. 20, 2005
Yoshitaka Sakamoto, Yokohama, JP;
Hisao Taguchi, Yokohama, JP;
Migaku Ota, Yokohama, JP;
Shinsuke Shimizu, Yokohama, JP;
Yoshitaka Sakamoto, Yokohama, JP;
Hisao Taguchi, Yokohama, JP;
Migaku Ota, Yokohama, JP;
Shinsuke Shimizu, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A packet routing arrangement, when receiving a request to join or leave a multicast group from a host unregistered to that group, a response is sent exclusively to the unregistered host. In the packet routing arrangement, when receiving a request packet from a host to join or leave a group, including the identifier of the group, it is determined whether the source host of the packet is registered to that group; and, if it is not registered, the first group identifier is changed to a second group identifier assigned to another delivery server delivering information to the other unregistered host and the packet is transferred to this other delivery server. When receiving a packet containing certain information from this delivery server, the second group identifier included in the received packet is changed to the first group identifier and the packet is transmitted to the unregistered host.