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:
Apr. 21, 2009
Filed:
Nov. 23, 2004
Applicants:
Allen Tsz-chiu Wong, San Jose, CA (US);
Zhidan Cheng, Sunnyvale, CA (US);
Inventors:
Allen Tsz-Chiu Wong, San Jose, CA (US);
Zhidan Cheng, Sunnyvale, CA (US);
Assignee:
Tellabs Petaluma, Inc., Petaluma, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 12/28 (2006.01); H04J 3/26 (2006.01);
U.S. Cl.
CPC ...
Abstract
An Internet Group Multicast Protocol (IGMP) proxy provides network redundancy to prevent a severed or damaged line, or a malfunctioning router interface from denying services to the IGMP proxy by outputting the multicast group addresses that are received by the IGMP proxy to a first multicast interface that is electrically connected to a first router interface of a router, and to a second multicast interface that is electrically connected to a second router interface of the router.