Patent application number | Description | Published |
20080232385 | COMMUNICATION SYSTEM, NODE DEVICE AND METHOD FOR SETTING CLASSES OF SERVICE - A communication system comprises a plurality of packet rings, each composed of a plurality of node devices, the node devices each transmitting and receiving a packet and being interconnected in a ring; two of the packet rings being interconnected via a pair of node devices each in each of the packet rings; the communication system further comprising: a table having recorded therein the correspondence between inter-ring service classes set between the packet rings and intra-ring service classes set in each packet ring; wherein the packet transferred in the packet ring includes information on the intra-ring service classes, as intra-ring header information, and information on the inter-ring service class, as inter-ring header information, the inter-ring service class(es) being correlated with the intra-ring service class(es), and being determined based on the table; the intra-ring header information being deleted when the packet is transferred from one of the packet rings to another. | 09-25-2008 |
20080316918 | PACKET RING NETWORK SYSTEM AND PACKET TRANSPORT METHOD - The present invention can reestablish a communication path between two packet ring networks through another packet ring network even if a fault occurs therebetween and can prevent occurrence of broadcast storm or the like. Therefore, a packet ring network system of the present invention includes a plurality of packet ring networks to which nodes are brought into ring form connection so that a packet inside a ring obtained by encapsulating a client packet, which a terminal outside the packet ring network transmits, is transmitted and received in a packet ring network, wherein, a first packet ring network is included; a plurality of subpacket ring networks connected to the first packet ring network through an interlink used for client packet transport therebetween is included; the interlink is provided to each of the subpacket ring networks connected to the first packet ring network; the first packet ring network and each of the subpacket ring networks include an interlink node connected to an interlink; each of the subpacket ring networks is connected to another subpacket ring network through a bypass pathway used for client packet transport when a fault occurs in an interlink; each of the subpacket ring networks includes a bypass pathway node connected to a bypass pathway to another subpacket ring network, and the bypass pathway node starts transport of a client packet with a bypass pathway in the case where a fault occurs in an interlink between a subpacket ring network to which a self-node belongs and a first packet ring network or in an interlink between a subpacket ring network to which a bypass pathway node connected to the self-node through a bypass pathway belongs and the first packet ring network. | 12-25-2008 |
20090022168 | PACKET RING NETWORK SYSTEM, METHOD OF CONNECTING PACKET RINGS, AND INTER-RING CONNECTING NODE - [Problems] To enable each of a plurality of links connecting rings to perform packet transfer while preventing multiple reception of packets and broadcast stream in a normal state where no failure has occurred. | 01-22-2009 |
20090034412 | Packet Ring Network System, Packet Transfer System, Redundancy Node, and Packet Transfer Program - In a ring network to which a plurality of nodes are connected, even though a failure occurs in a link between a node and a client apparatus (a user terminal) or a node itself, communication between the node and the client apparatus can be achieved. Nodes ( | 02-05-2009 |
20090052317 | Ring Network System, Failure Recovery Method, Failure Detection Method, Node and Program for Node - In a multi-ring network with a plurality of rings to which RPR is applied connected, high-speed failure recovery is enabled when a failure occurs between the rings. The contact nodes | 02-26-2009 |
20090185566 | NETWORK NODE, FRAME TRANSFER PROGRAM AND FRAME TRANSFER METHOD - A network node including an FDB for registering a relationship between a destination MAC address and a port label, an input port table for registering a relationship between an input port and a port label, and a port label table for registering a relationship between a port label and an output port, at the reception of a frame, registers a relationship between a transmission source MAC address of a frame and a port label registered for an input port in the input port table at the FDB, at the time of transmission of a frame, transmits the frame to an output port registered at the port label table which port corresponds to a port label registered for the destination MAC address in the FDB and at the time of processing of flushing or updating the FDB unit, changes the contents of the input port table and the port label table. | 07-23-2009 |
20090268746 | COMMUNICATION SYSTEM, COMMUNICATION METHOD, NODE, AND PROGRAM FOR NODE - In the case where a terminal under an RPR node ( | 10-29-2009 |
20100014527 | PACKET RING NETWORK SYSTEM, PACKET FORWARDING METHOD AND NODE | 01-21-2010 |
20100034204 | PACKET RING NETWORK SYSTEM, PACKET TRANSFER METHOD AND INTERLINK NODE - A packet ring network system includes PHY selection circuits ( | 02-11-2010 |
20100158002 | COMMUNICATION SYSTEM, NODE, TERMINAL, PROGRAM AND COMMUNICATION METHOD - In a communication system formed of two or more networks in which a part or all of nodes belonging to each said network form a plurality of combinations of nodes so as not to overlap with other node on the network to which each node belongs, the nodes belonging to the same combination are connected with each other and terminals are connected under the control of a part or all of the nodes belonging to the same combination, a node belonging to the combination transmits a frame received from a terminal under the control of the node itself to any of adjacent nodes on the network to which the node itself belongs and a node belonging to the same combination to which the node itself belongs and connected to the node itself. This obtains a highly reliable communication system whose desired transmission capacity can be realized at low costs and which can be restored from an abnormal state in a short time period. | 06-24-2010 |
20100226377 | Communication System, Node, Terminal and Communication Method and Program - It is possible to increase the communication system transmission capacity flexibly and at low cost in accordance with a communication system traffic amount. A terminal connected to a plurality of networks distributes a plurality of frame segments generated by dividing a single frame to the plurality of networks connected to the local terminal transmits them. Further, the terminal reconstructs the original frame from the plurality of frame segments generated by dividing the single frame. It should be noted that each of the frame segments contains division configuration information indicating how the frame has been divided (the number of divisions and the order of the frame segments) and also contains information required for performing MAC address learning for determining the path to the destination terminal. | 09-09-2010 |
20110116790 | WAVELENGTH PATH COMMUNICATION NODE APPARATUS, WAVELENGTH PATH COMMUNICATION CONTROL METHOD, PROGRAM, AND RECORDING MEDIUM - A wavelength path communication node apparatus includes a wavelength path demultiplexer ( | 05-19-2011 |
20110158086 | PACKET RING NETWORK SYSTEM, PACKET FORWARDING METHOD AND NODE | 06-30-2011 |
20120033969 | WAVELENGTH PATH MULTIPLEXING AND DEMULTIPLEXING OPTICAL TRANSMISSION APPARATUS - A sending apparatus includes: a wavelength path multiplexing part; a sending wavelength path selection part; and an optical transmitter having optical sending parts. The wavelength path multiplexing part includes: sending wavelength path demultiplexing ports; and sending wavelength multiplexing ports connected thereto. The sending wavelength path multiplexing ports are connected to optical transmission paths respectively. The sending wavelength path selection part includes a wavelength multiplexing parts which multiplexing a set combination of optical signals among the optical signals inputted to the sending input ports and outputs it to any of the sending output ports. In the wavelength path sending or receiving by the wavelength path multiplexing/demultiplexing optical transmission apparatus, a non-selectable combination between a wavelength and a route can be avoided. | 02-09-2012 |
20120195594 | Optical Signal Transmission Device, Optical Signal Reception Device, Wavelength Division Multiplexing Optical Communication Device, and Wavelength Path System - Restrictions, due to wavelength paths which are non-alternative combinations of wavelengths and paths, are solved. An optical-signal-transmission device comprises M optical-output means outputting optical signals having different wavelengths; optical-switch means having M input ports respectively connected to the optical-output means and output ports, and switching connections between the input ports and the output ports; and wavelength-multiplexing means having M acceptance ports respectively connected to the output ports, N forward ports switchably connected to the acceptance ports corresponding to wavelengths of optical signals inputted to the acceptance ports and transmitting multiplexed-optical signals corresponding to the optical signals accepted by the acceptance ports, wherein when Y particular input ports of the input ports are connected to one particular output port of the output ports, the switch means combines Y optical signals inputted to the particular input ports to generate a combined signal, and outputs the combined signal to the particular output port. | 08-02-2012 |
20130094853 | MULTIPLEXER/DEMULTIPLEXER AND MULTIPLEXING/DEMULTIPLEXING METHOD - In order to realize a multiplexer/demultiplexer in which utilization efficiency of a frequency is high, wavelength characteristics of a transmission band is flat, the cost is low, the size is small, and a wavelength and a band are variable, the multiplexer/demultiplexer includes: first light branching means for branching inputted light into plurality of pieces of light and outputting the branched pieces of light; a plurality of light wavelength separating means for separating and outputting light outputted from the first light branching means for each of predetermined frequency bands; and an optical coupling means for making outputs having frequency bands different from each other among outputs from the light wavelength separating means gather and be outputted. | 04-18-2013 |
20130188950 | WAVELENGTH PATH MULTIPLEXING/DEMULTIPLEXING APPARATUS AND WAVELENGTH PATH MULTIPLEXING/DEMULTIPLEXING METHOD - In order to connect a path and a transponder with low loss, reduce an apparatus cost, reduce an apparatus size, and improve a reliability of an apparatus, a wavelength path multiplexing/demultiplexing apparatus comprises multiplexing/demultiplexing unit having a multiplexing port through which a wavelength multiplexed light is inputted and outputted and a demultiplexing port in which the wavelength multiplexed light is demultiplexed into the lights included in the wavelength multiplexed light based on the wavelength and through which the light is inputted and outputted and first switch unit which have a first port to which the demultiplexing port is connected and a second port and connect the second port to one of the first ports; and the demultiplexing port is connected to the first port of each of the first switch unit and the first port is connected to the demultiplexing port of each of the multiplexing/demultiplexing unit. | 07-25-2013 |
20130222890 | EXCITATION LIGHT DISTRIBUTION DEVICE, EXCITATION LIGHT DISTRIBUTION METHOD, OPTICAL AMPLIFICATION SYSTEM AND NODE DEVICE - For the purpose of reducing the cost and power consumption of an optical amplification system provided with an optical amplifier, an excitation light distribution device of the present invention comprises an excitation light source output unit which outputs excitation light, an optical branching unit with variable branching ratio which branches and outputs the excitation light, and a control unit which, on the basis of information on an optical signal to be amplified by the excitation light outputted by the optical branching unit, controls at least either the branching ratio of the optical branching unit or the optical output power of the excitation light source output unit. | 08-29-2013 |
20130279918 | POWER SAVING CONTROL METHOD AND NODE DEVICE IN OPTICAL COMMUNICATION NETWORK - A node device and a power saving method in an optical communication network system that can achieve both of a reduction in startup period and a reduction in power consumption. A node device ( | 10-24-2013 |
20130294770 | MONITORING SYSTEM, MONITORING METHOD AND MONITORING PROGRAM - A monitoring system which enables monitoring of a transponder accommodated in an optical path in a transmission node and a node according to their operation conditions is provided. The monitoring system comprises a monitor control management unit connected to at least one of ports of wavelength selective switches which monitors an inspection signal or an operation signal, and a control unit which controls the wavelength selective switch so as to enable monitoring by the monitor control management unit. | 11-07-2013 |
20140133800 | OPTICAL SWITCH CONTROL METHOD, OPTICAL SWITCH CONTROL DEVICE, AND OPTICAL TRANSMISSION SYSTEM - An optical switch control device includes a driving control unit ( | 05-15-2014 |