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:
Jan. 17, 2012
Filed:
Oct. 02, 2009
Hideki Endo, Hachioji, JP;
Masahiko Mizutani, Kokubunji, JP;
Masayuki Takase, Kokubunji, JP;
Kenichi Sakamoto, Kokubunji, JP;
Yoshihiro Ashi, Yokohama, JP;
Takayuki Kanno, Yokohama, JP;
Nobuyuki Yamamoto, Yokohama, JP;
Hideki Endo, Hachioji, JP;
Masahiko Mizutani, Kokubunji, JP;
Masayuki Takase, Kokubunji, JP;
Kenichi Sakamoto, Kokubunji, JP;
Yoshihiro Ashi, Yokohama, JP;
Takayuki Kanno, Yokohama, JP;
Nobuyuki Yamamoto, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed herewith is a PON system and a bandwidth controlling method capable of controlling congestion with use of an upstream bandwidth in a PON section efficiently when congestion occurs in a gateway (GW) connected to an OLT. An OLT connected to a plurality of ONUs through a passive optical network (PON) and to a gateway (GW) through a communication line, when receiving a congestion occurrence notice indicating a congestion occurred output number from a GW, identifies the identifier of the ONU that is using a GW output line having the congestion output port number and shifts the bandwidth controlling of the PON section in a normal mode for allocating a bandwidth to each ONU normally to that in a bandwidth suppression mode for allocating a congestion time allowable bandwidth that is less than the current bandwidth to the ONU having the identified ONU identifier and a bandwidth to each of other ONUs according to its transmission queue length.