Patent application number | Description | Published |
20080298304 | ROUTING METHOD IN WIRELESS MULTI-HOP NETWORK AND COMMUNICATION TERMINAL - A wireless multi-hop network communication terminal | 12-04-2008 |
20090180489 | NODE, ROUTING CONTROL METHOD, AND ROUTING CONTROL PROGRAM - Disclosed is a node that includes a distributed hash table generation means that generates a distributed hash table which indicates the next node to which a message is to be transferred, using a link state routing protocol, a link state information that exchange unit sends and receives link state information, and a tree delivery control unit that determines the transfer destination of the link state information so that the link state information is delivered along a tree where the source node of the link state information is a root. | 07-16-2009 |
20090204981 | CLUSTER SYSTEM, SERVER CLUSTER, CLUSTER MEMBER, METHOD FOR MAKING CLUSTER MEMBER REDUNDANT AND LOAD DISTRIBUTING METHOD - A protocol process to a reception traffic is executed by cluster members of a current use system and a backup system. The backup system discards the reception traffic subjected to the protocol process and only the current use system transfers the reception traffic to an AP. The AP makes an application process redundant in an independent method. The cluster member in charge of the protocol process to the reception traffic is determined by using a data in a lower layer and the cluster member in charge of the application process is determined by using a data in a higher layer after the protocol process. | 08-13-2009 |
20090232030 | OVERLAY LINK CALCULATION DEVICE, CALCULATION METHOD AND PROGRAM THEREOF - The overlay link calculation device which determines a link between nodes in an overlay network formed by layers of a higher order than a network layer, which includes a topology information obtaining unit which obtains topology information of the network layer and a link calculation which calculates an overlay link based on the obtained topology information. | 09-17-2009 |
20090245249 | MULTICAST NODE APPARATUS, MULTICAST TRANSFER METHOD AND PROGRAM - To provide an apparatus that optimizes the wait time in node apparatuses performing a packet backup using a multipath. The apparatus uses statistic information related to the transmission qualities of the paths constituting the multipath, thereby determining the minimum wait time that satisfies a target packet backup rate. | 10-01-2009 |
20100002712 | PATH CONTROL METHOD ADAPTED TO AUTONOMOUS SYSTEM ROUTING PROTOCOL FOR COMMUNICATION NETWORK - A path control method includes a procedure for developing a path control message including regional information in transmission on the network. The regional information designates a path and/or a path length for transmitting the path control message. The path control message includes a regional property for instructing each node as to how to process the regional information either in a strict manner or in a flexible manner. With reference to the regional information and/or the regional property, each node is capable of selecting a destination node to which the path control message is to be transmitted, stopping the further transmission of the path control message, or discarding the path control message. | 01-07-2010 |
20100150029 | TOPOLOGY SPECIFYING METHOD AND TOPOLOGY SPECIFYING APPARATUS - A topology specifying apparatus | 06-17-2010 |
20100172240 | TRAFFIC ENGINEERING APPARATUS, NETWORK SYSTEM, AND TRAFFIC CONTROL METHOD AND PROGRAM - The present invention provides a traffic engineering apparatus which performs traffic engineering, including: an optimal branch point determination unit which determines an optimal branch point in a network to realize a predetermined policy; and a traffic flow regulation unit which regulates a traffic flow rate into the local node during reception of traffic based on the optimal branch point determined by the optimal branch point determination unit. | 07-08-2010 |
20100175123 | ADDRESS TRANSLATION DEVICE AND ADDRESS TRANSLATION METHOD - In order to more efficiently use port resources, which are finite global address resources assigned to an address translation device, the address translation device holds a session-port assignment table showing a correspondence between an existing session and a local endpoint (port resource) in the address translation device, and a port assignment rule indicating port usage about assignable ports. An address translation unit translates address information of a packet received according to the correspondence between the existing session and the port resource shown in the session-port assignment table, and assigns the port according to the port usage indicated by the port assignment rule for a packet for opening a new session. An assignment rule update unit changes a ratio of the port usage in the port assignment rule while the correspondence between the existing session and the port resource in the session-port assignment table is not changed. | 07-08-2010 |
20100191848 | INFORMATION SHARING METHOD BETWEEN NEIGHBORING NODES, NODE AND INFORMATION SHARING PROGRAM - A load caused by an information sharing message in an upper layer is reduced. | 07-29-2010 |
20100238921 | COMMUNICATION APPARATUS, ITS OPERATING METHOD, AND OPERATING PROGRAM - An object of the present invention is to provide a communication apparatus capable of connecting required modules for use in protocol processing depending on a packet to be processed without previous setting of the execution order of the modules so as to perform packet processing. A communication apparatus retains meta-information for each module implementing a protocol and a calculating means (transmission path restriction calculating section) for calculating module connection order based on the meta-information and a packet to be processed. The meta-information includes: the type of services that each module can provide on a protocol stack; a rule according to which it is determined whether each module can execute processing of a packet to be processed; and module information on a result of the determination of whether or not each module can execute the processing of a packet to be processed. The calculating means determines, according to the rule, whether each module can perform processing of a packet to be processed, attaches the information concerning the type of services to the packet to be processed, and outputs the connection order of modules by which the entire portion of the packet can be processed while acquiring the meta information from the packet. | 09-23-2010 |
20100265951 | ROUTING METHOD AND NODE - A routing protocol unit ( | 10-21-2010 |
20110019539 | RELAY DEVICE, NETWORK SYSTEM, ROUTE SWITCHING METHOD, AND RECORDING MEDIUM - When a failure occurs in a link or another relay device, a route control unit updates a routing table stored in a current routing table. Upon update, it acquires inhibit target route information indicating a route likely to cause a micro-loop in the updated routing table and registers it into an inhibit target table. If route update in an adjacent relay device is completed, an inhibit control unit deletes a route in which the adjacent relay device is set as a next transfer destination from the inhibit target table. A transfer processing unit determines a transfer route of a packet based on the current routing table and, if the determined transfer route is not registered in the inhibit target table, executes transfer of the packet. A micro-loop can be thereby reliably avoided when route switching in a network system where communication between plural networks is relayed by plural relay devices. | 01-27-2011 |
20110216668 | NODE APPARATUS, ROUTE CONTROL METHOD, ROUTE COMPUTATION SYSTEM, AND ROUTE COMPUTATION APPARATUS - A node apparatus wherein when a topology change occurs on a network used for packet transfer between node apparatuses, the node apparatus performs dynamic route control for establishing a new normal route. The node apparatus has a device that receives, from another node apparatus, a route control message which includes information required for route determination; a device that computes a route on the network based on the received route control message; a device that sends another node apparatus a route control message which includes information required for said another node apparatus to determine a route on the network; a device wherein when receiving the route control message, this device computes an operation start time for route control operation by the route computation and the message sending, based on a distance between a topology change part and said node apparatus of oneself; and a device that controls the execution of the route control operation based on the computed operation start time. | 09-08-2011 |
20110216673 | TOPOLOGY DETECTION METHOD AND TOPOLOGY DETECTION APPARATUS - A topology detection apparatus includes, in a network having a tree-type topology: a route overlap judgment part that judges an existence or non-existence of an overlap between: a first route between terminals whose connection position are known; and a second route between a terminal whose connection position is known and a terminal whose connection position is unknown; and a topology detection part which determines the network topology based on the existence or non-existence of the first route and the second route. | 09-08-2011 |
20110255437 | COMMUNICATION QUALITY MONITORING DEVICE, COMMUNICATION SYSTEM, COMMUNICATION QUALITY MONITORING METHOD AND PROGRAM THEREOF - A communication quality monitoring device is provided which determines communication quality deterioration by variation of a transmission buffer length in session control irrespectively of generation/non-generation of a data loss. | 10-20-2011 |
20110258341 | PATH CONTROL APPARATUS, PATH CONTROL METHOD, PATH CONTROL PROGRAM, AND NETWORK SYSTEM - A path control apparatus of the present invention includes: a status change detecting unit that detects a status change of a network; a path calculating unit that decides a path in accordance with the status of the network; and a calculation execution node deciding unit that compares a shortest path tree, which is established before occurrence of a change in the status of the network calculated by the path calculating unit, with a shortest path tree, which is established after the occurrence of the change in the status of the network calculated by the path calculating unit, and creates information required for determining whether a node apparatus in the network needs a path update, when the change occurs in the status of the network. | 10-20-2011 |
20120314576 | HIGH-SPEED COMMUNICATION SYSTEM AND HIGH-SPEED COMMUNICATION METHOD - A high-speed communication system according to the present invention includes: a plurality of nodes disposed on a communication path; and a plurality of communication connections established between the plurality of nodes. The plurality of nodes exchange a plurality of pieces of performance model information between the nodes, the plurality of pieces of performance model information representing communication performances achievable by each of the plurality of communication connections. Each of the plurality of nodes executes communication control based on any one of the plurality of pieces of performance model information. | 12-13-2012 |
20130272310 | MAPPING SERVER, NETWORK SYSTEM, PACKET FORWARDING METHOD AND PROGRAM - A mapping server includes: a path information obtaining unit that obtains path information on external networks through a forwarding device connected to an external network; and a mapping information generating unit that generates mapping information that relates the path information and the forwarding device. | 10-17-2013 |
20140355472 | COMMUNICATION SYSTEM, COMMUNICATION METHOD AND DATA RECEIVING TERMINAL - A communication system includes a data sending terminal which sends data and a data receiving terminal which sends an acknowledgement, which indicates that the data is received, to the data sending terminal in reply to receiving the data, and the data receiving terminal includes a unit which judges whether it is necessary to resend the acknowledgement on the basis of judgment whether the data receiving terminal receives new data from the data sending terminal within a predetermined time since sending the acknowledgement. | 12-04-2014 |