Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate
2007-02-05
2009-10-13
Ngo, Ricky (Department: 2416)
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
C370S398000, C370S395410, C370S396000, C398S058000
Reexamination Certificate
active
07602800
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.
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IEEE Standards for Local and Metropolitan Area Networks: Supplements to Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications; Specification for 802.3 Full Duplex OperationandPhysical Layer Specification for 100 Mb/s Operation on Two Pairs of Category 3 or Better Balanced Twisted Pair Cables (100BASE-T2), 1997.
Ashi Yoshihiro
Endo Hideki
Kanno Takayuki
Mizutani Masahiko
Sakamoto Ken'ichi
Hitachi Communication Technologies Ltd.
Mattingly & Malur, P.C.
Ngo Ricky
Samuel Dewanda
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