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. 11, 2010
Filed:
Dec. 10, 2007
Yuzuru Masuya, Kanagawa, JP;
Koichi Kihara, Chiba, JP;
Koichi Yamazaki, Chiba, JP;
Takashi Ishiguro, Saitama, JP;
Yasuhiro Tazoi, Chiba, JP;
Junji Arai, Gumma, JP;
Takeshi Shimomura, Saitama, JP;
Yuzuru Masuya, Kanagawa, JP;
Koichi Kihara, Chiba, JP;
Koichi Yamazaki, Chiba, JP;
Takashi Ishiguro, Saitama, JP;
Yasuhiro Tazoi, Chiba, JP;
Junji Arai, Gumma, JP;
Takeshi Shimomura, Saitama, JP;
Oki Electric Industry Co. Ltd., Tokyo, JP;
Abstract
A redundancy gateway system that can avoid short interruption of data communication caused by system switching in gateway units configured in a multiplex manner for a plurality of systems, and that can maintain the communication state prior to the system switching and avoid degradation of communication quality. A duplicate of a received packet is generated, thereby supplying the packet of the same content to a configuration of gateway units. For each packet, a common write pointer corresponding to identification information appended to the packet is generated. Each gateway unit writes the packet to its own jitter buffer in accordance with the common write pointer corresponding to each supplied packet, sequentially reads out the written packet from the jitter buffer, and generates a TDM signal. One of the gateway units is selectively switched and only the TDM signal generated by the one gateway unit is supplied to a TDM network.