Fujitsu Corporation

Tomonori Gotoh

Katsumi Tanaka

Tetsuya Nishi

Kenzo Kobayashi

Yasutaka Umemoto

Yosuke Arimura

Takashi Saito

Kiichi Sugitani

Kazuyuki Inomoto

Tsutomu Togo

Kazunari Shiota

Seiji Meki

Ryu Kobayashi

Hiroaki Nagao

Nobuyuki Tamura

Noboru Matsubara

Takashi Yasuda

Satoshi Yasutaka

Ryota Komatsu

Hiroto Shingai

Kazuyoshi Yamauchi

Gaku Tanabe

A form image managing system includes a master image storing unit configured to store a plurality of types of master images, a obtaining unit configured to obtain a form image, a searching unit configured to search the master image storing unit for a master image having the highest correlation with the form image obtained by the obtaining unit among the plurality of types of master images, a generating unit configured to generate differential data of the form image, obtained by the obtaining unit, from the master image searched by the searching unit, and a differential data storing unit configured to associate identification information for identifying the master image searched by the searching unit from the plurality of types of master images stored in the master image storing unit with the differential data generated by the generating unit, and to store the identification information and the differential data.

Form image managing system and method

A form image managing system includes a partitioned master image storing unit which stores partitioned master images obtained by partitioning a master image, a form image obtaining unit which obtains an image of a form, a searching unit which searches the partitioned master image storing unit for a partitioned master image having a high correlation with each of a plurality of partial images obtained by partitioning the image of the form, a difference data generating unit which generates difference data between the partial image and corresponding partitioned master image having the high correlation with the partial image, and a form image data storing unit which stores, as form image data that represents the image of the form, identification information for identifying the corresponding partitioned master image and the difference data by making the identification information and the difference data correspond to the partial image.

Form image managing system and form image managing method

A network verification system verifies a network to which a relay apparatus relays a packet. A test management apparatus includes a condition acquiring unit to acquire verification conditions which contain an unused network address as a test target and a registering unit to register, in an address resolution table of the relay apparatus, an entry in which the unused network address contained in the acquired verification conditions is associated with a physical address of the testing apparatus. A testing apparatus includes a test packet transmitting unit to transmit, when instructed by the test management apparatus, the plurality of test packets to form a plurality of connections based on the verification conditions, a test packet receiving unit to receive the plurality of test packets and a measuring unit to measure communication qualities with respect to the respective connections of the plurality of test packets.

Network verification system

A test packet transmitting apparatus transmits respective test packets including different pieces of identification information to a repeating installation. The repeating installation makes a predetermined number of copies of each test packet received from the test packet transmitting apparatus to be transmitted to a test packet receiving apparatus, and determines the predetermined number of copies as a population to measure a communication quality. The test packet receiving device counts the received test packets according to each type of identification information.

Measurement managing apparatus and communication system

In order to preliminarily confirming whether or not a protection route to be switched over can be safely switched over during a working route being used in a unicast or multicast mode. a notification of communication confirmation/quality confirmation or multicast communication confirmation is received from a manager device is received. When the received unicast or multicast packet does not include an confirmation identifier instructed by the notification while the received unicast or multicast packet includes a destination network or multicast address instructed by the notification, the received packet is mirrored and the confirmation identifier is set in a predetermined area within a header of the packet to be transferred to a preselected protection route. When the received packet includes the destination network or multicast address and the confirmation identifier instructed by the notification, the manager device is notified of a result of the communication confirmation/quality confirmation and the packet is transferred to the protection route.

Route confirmation method and device

A loop locating apparatus and method enabling simple and fast identification of a Layerloop fault occurring in a network, wherein, when the possibility of a Layerloop is detected, a loop locating command function unit makes a packet transmission/reception function unit send a series of inspection packets (Pis) with successively incremented TTLs and monitors the return packets (te) of the inspection packets (Pis) by a return number counting function unit and wherein a loop location decision function unit finds the routers returning packets (te) with remarkably larger return numbers than the others and identifies the routers with return numbers over a predetermined threshold as the location of occurrence of the loop.

Loop locating apparatus and loop locating method in layer 3 network

The invention relates to a package starting control device determining a moment and a sequence of starting a package corresponding to an individual wavelength to be wavelength-division-multiplexed in a wavelength division multiplex transmission device. An object of the invention is to provide a package starting control device capable of effectively increasing or decreasing the number of wavelengths at low cost without changing a basic structure drastically. The package starting control device is constructed such that operational states of optical modules that generate optical signals wavelength-division-multiplexed into wavelength division multiplexed optical signals are monitored, the optical signal output by packages that generate the optical signals wavelength-division-multiplexed into the wavelength division multiplexed optical signals during a period when any of the operational states is not in a steady state is restricted and the restriction of the optical signal output by one package of the packages each time the period elapses is released.

Package starting control device

A transmitter equipped with a plurality of transmission path ports and a relay section. The relay section has a routing table and a router. In the routing table, information about the relay of the received packet to one of the transmission path ports connected to a relay transmission path is stored, correlated with both a port identifier of each the transmission path port and the source address of the transmitter that transmitted the packet. The router extracts the port identifier of the transmission path port that received the packet and the source address contained in the received packet, and routes the received packet to the transmission path port connected to the relay transmission path by referring to the routing table for the extracted port identifier and the extracted source address.

Transmitter and method of transmission

Disclosed is a network system capable of transferring data at a high speed between multicast-supported networks via a L2 network. The network system includes a multicast-unsupported L2 network, two multicast-supported network, two gateway devices for connecting one of the multicast-supported networks to the multicast-unsupported L2 network, and each of witch is capble of assembling, when a multicast data packet is transmitted from the side of the multicast-supported network, a L2-network packet in which a destination MAC address of the multicast data packet is translated into a MAC address of the other gateway device, and transmitting the L2-network packet over the L2 network.

Gateway device connecting multicast-supported network to multicast-unsupported L2 network

A network monitoring device that monitors a network state, includes a receiving unit that receives a packet passing through the network; a processing unit that performs analysis of the network state with respect to the packet received; and a determining unit that determines whether a failure has occurred in the network, based on the result obtained by the processing unit.

Device and method for network monitoring

A multicast network system is provided with a multicast network unit that delivers data between independent multicast network domains. The multicast network unit includes an extraction part for extracting a multicast delivery destination address from received data, a holder part for holding conversion data where the multicast delivery destination address corresponds to a delivery source address, and a judgment part for judging whether the multicast delivery destination address is held and outputting the result of a judgment. The multicast network unit also includes a filtering part which, when the result of the judgment is holding, converts the multicast delivery source address to an arbitrary delivery destination address and, when it is non-holding, discards the received data. The multicast network unit further includes a transmitter part for transmitting data containing the converted multicast address to the domain.

Multicast network unit, multicast network system, and multicast method

A network integrated management system transferring monitor/control information by e-mail using the Internet () between a monitor/control apparatus () having a network () to be monitored and controlled under it and a network integrated management apparatus () integratedly managing the network through the monitor/control apparatus.

Integrated management system utilizing e-mail for remotely monitoring/controlling over the internet

An intensive management apparatus for managing a time-sharing multiplexing network, comprises: a path-information-creating unit for creating path information including a group identifier, termination information of terminating connection points, a path management number assigned to a path connecting the terminating connection points at which time slots in a communication apparatus are allocated and an allocated-time-slot number; a time-slot-allocating unit for creating time-slot-allocation information describing allocation of the time slots to a path identified by the path management number included in the time-slot-allocation information for each of the terminating connection points; a path-information-checking unit for forming a judgment on validity of each of a plurality of paths identified by the same group identifier assigned to a path-information group comprising pieces of path information describing the paths on the basis of the path information; and a result display unit for displaying results of the judgment on validity of the paths.

Intensive management apparatus for checking path validity in time-sharing multiplexing network

A monitoring apparatus and apparatuses to be monitored each have an address holding unit which holds the address of a group to which each apparatus belongs. A data frame to be transmitted between the monitoring apparatus and each of the apparatuses to be monitored includes an identifier which specifies communication between two apparatuses or group broadcast. When the identifier specifies the group broadcast, a group address is put in the data frame. In this manner, a large number of apparatuses which form a large-scale network can be divided into groups, and the group broadcast can be carried out when a plurality of monitoring apparatuses are used for monitoring the apparatuses, thereby eliminating the need of polling.

Growing community of inventors

Kawasaki, Japan

Tomonori Gotoh