Abstract: A system for use with communications according to TCP, or a similar protocol, comprises a sender host, one or more routers and a destination host. Each router comprises means for generating acknowledgement packets and translating addresses associated with data packets. When a data packet is received by a router, an acknowledgement packet is returned with a source address corresponding to the router and a destination address corresponding to the sender host. The sender host perceives the acknowledgement packet as having been sent by the destination host. As the acknowledgement packet is sent by the router, and not the destination host, this system allows acknowledgement packets to be received on a shorter timescale, reducing the effects of a link delay. Although the route between the sender host and the destination host is divided into multiple connections, the hosts perceive a single, conventional connection.

Abstract: In order to allow efficient use of bandwidth in communication paths in a surveillance system, the surveillance system has an operation unit which assigns fixed bandwidths to each of the communications taking place between camera nodes, which transfer image data at a uniform rate, and monitor nodes. A fixed bandwidth is assigned to, all communications taking place between the operation unit and sensor nodes, which generate alarm information at a non-uniform rate. If there is an increase in network traffic, bandwidth allocations, for communication between the camera nodes and the monitor nodes are reassigned so that bandwidth for these communications is reduced. The camera nodes use the bandwidth assigned to the camera nodes to transfer image data. The sensor nodes transfer alarm information using any bandwidth.

Abstract: A sender of a message can transmit a message to an unspecified user merely by specifying a condition of space without specifying a recipient of the message, using an information processing terminal transmitting a message not with a user address to specify a user but with an area address (a condition of space) to specify an area within an electric wave reachable range of a radio base station; and a server converting the area address to a user address which specifies a PHS terminal currently located in the area represented by said area address and transmitting the message with a converted address to a switching equipment.

Abstract: In order to allow efficient use of bandwidth in communication paths in a surveillance system, the surveillance system has an operation unit which assigns fixed bandwidths to each of the communications taking place between camera nodes, which transfer image data at a uniform rate, and monitor nodes. A fixed bandwidth is assigned to, all communications taking place between the operation unit and sensor nodes, which generate alarm information at a non-uniform rate. If there is an increase in network traffic, bandwidth allocations, for communication between the camera nodes and the monitor nodes are reassigned so that bandwidth for these communications is reduced. The camera nodes use the bandwidth assigned to the camera nodes to transfer image data. The sensor nodes transfer alarm information using any bandwidth.

Abstract: In order to allow efficient use of bandwidth in communication paths in a surveillance system, the surveillance system has an operation unit which assigns fixed bandwidths to each of the communications taking place between camera nodes, which transfer image data at a uniform rate, and monitor nodes. A fixed bandwidth is assigned to, all communications taking place between the operation unit and sensor nodes, which generate alarm information at a non-uniform rate. If there is an increase in network traffic, bandwidth allocations, for communication between the camera nodes and the monitor nodes are reassigned so that bandwidth for these communications is reduced. The camera nodes use the bandwidth assigned to the camera nodes to transfer image data. The sensor nodes transfer alarm information using any bandwidth.

Abstract: According to the present invention, a file recovery system is provided in which the commands for recovering files such as a historical file are unnecessitated and the recovery system configuration is independent of the host processing system. That is, since the equipment for achieving a file recovery does not have information about the location of the recovery data, information about the content of a file to be recovered is transmitted to a transmission line. The other equipments asynchronously receive the information and judges whether or not a file containing the same content exists in the own system. If its file exists, the content of the file is transmitted to the transmission line. The equipment achieving the file recovery asynchronously receives from the transmission line the file data of files such as a historical file and establishes data consistency by use of the buffered current data and the event number, thereby recovering files such as a historical file.

Abstract: In view of providing a network system enabling communication having passed fire walls (repeaters) and assuring high security and operation flexibility through access control based on users and applications, a user-held table indicating correspondence between repeaters and passwords, a repeater-held table indicating correspondence between users and passwords and a table indicating access regions are defined respectively for users, departments of users and official positions of users and a route control information storing table indicating correspondence between networks and next transmitting destination is also provided to execute the access control for each user.

Abstract: A method or system to change a display output by a program without modifying the program. The invention also provides a program or computer to accomplish this change in display output. The invention intercepts and converts a graphics display command into the desired configuration and also performs reverse conversion of input data in compliance with computer environment assumed from the program. Additionally the invention converts data exchanged between the program and computer system mutually as needed.

Abstract: A shared window of the same content is displayed on each display device of a plurality of computers connected through a communication network for use in a collaborative work and objects are displayed on the window. Each object is displayed based on object management data having a plurality of types of attributes set therein and the shared windows on which the objects are displayed are limited by the attribute values of the attributes. Further, participants of the collaborative work who are permitted to erase the objects are limited by the settings of the attribute values of the attributes.

Abstract: A joint work support system includes a plurality of terminals mutually connected to one another through a network. Each terminal includes a first data communication means and an operation means. The operation means performs operations to support joint work in both a joint work state, when the terminal is connected to another terminal through the network, and a local state, when the terminal is not connected to another terminal through the network. To operate in the local state, each of the terminals includes recording data creating means, second data communication means and reproduction means.

Abstract: An ink cartridge for use with, for example, a stencil printer and storing viscous ink therein is disclosed. The cartridge is free from damage and deformation during storage or transport in various kinds of atmospheres. Particularly, an ink outlet included in the cartridge is prevented from tilting. The cartridge can, therefore, be surely and accurately mounted to an apparatus. The ink outlet is protected from damage even when the cartridge is let fall by accident.

Abstract: It is designed to connect a duplicated LAN to a network terminal such as a controller having a standard serial or parallel interface, a computer having only one LAN interface, or a computer having only one communication line interface.The network interface apparatus for connecting a network terminal and a duplicated LAN comprises a device for controlling interfaces with the network terminal and the LAN transmission line of each of the duplicated LAN, a buffer, and a sending device to both, and the data from the network terminal is buffered in the buffer, and when the buffered data reaches a fixed amount, the data is sent to both LANs of the duplicated LAN. On the other hand, with respect to the data received from each LAN transmission line of the duplicated LAN, only the data which is judged as earlier arrival data is sent to the network terminal.

Abstract: A network interface apparatus connected between a LAN adaptor possessed by a computer and a transceiver provided on a network includes a buffer memory for storing data, a first control circuit for communicating with the LAN adaptor, a second control circuit for communicating with the transceiver, and a processor for controlling the first and second control circuits to control the transfer of data between the LAN adaptor and the transceiver. The processor causes the buffer memory to store transmit data transmitted from the LAN adaptor and transmits the stored transmit data in the buffer memory to the transceiver in a transmission time zone which is allotted beforehand. The transmission time zone is determined by the processor on the basis of the reception of a synchronizing packet which is transferred on the network. Receive data received from the transceiver is selected by the processor so that only the selected receive data is sent to the LAN adaptor.

Abstract: A distributed memory computer system periodically performs memory copy among a plurality of computers by using general-purpose communication control devices and a transmission line of the CSMA/CD type. A master computer periodically generates a synchronizing packet, and transmits data for memory copy and normal data in a time slot immediately after the transmission of the synchronizing packet. Each computer other than the master computer transmits the data for memory copy and the normal data in its own time slot after the elapse of a predetermined time. The respective computers complete their transmissions within predetermined times. Since the time slots are assigned to the respective computers, the number of computers which may compete with each other on a transmission line can be restricted and each computer can be assured a periodic opportunity to transmit data.

Abstract: Attribute information of programs developed by processors in a distributed processing system include I/O data for defining I/O operation of the programs, which is given in a program description form. A correlation of the programs is checked based on the content of the attribute information. Program generation information, program content information and program modification information are added to the sharedly developed programs and they are updated in the course of development.

Abstract: A distributed processing method and system including a plurality of processors connected via a transmission path, in which a function is provided to an arbitrary processor to receive information and data passing through the transmission path and to obtain the received data based on information indicating input/output relationships between modules corresponding to the association of processing between the modules. When required, necessary portions of the obtained information and logging results are extracted, so that not only the time series data log but also the information or data log can be collected corresponding to the flow of a sequence of processing by establishing a display or print-out module. Furthermore, when data is received from an external device, the system generates a message having information indicating the order of the data and the content code representing content of the data and sends the message to the transmission path.

Abstract: A distributed processing method and system including a plurality of processors connected via a transmission path, in which a function is provided to an arbitrary processor to receive information and data passing through the transmission path and to obtain the received data based on information indicating input/output relationships between modules corresponding to the association of processing between the modules. When required, necessary portions of the obtained information and logging results are extracted, so that not only the time series data log but also the information or data log can be collected corresponding to the flow of a sequence of processing by establishing a display or print-out module. Furthermore, when data is received from an external device, the system generates a message having information indicating the order of the data and the content code representing content of the data and sends the message to the transmission path.

Abstract: Programs in a plurality of processors connected through a common network are started when a plurality of data necessary for starting the program are received from the network. When the processor receives data from an external equipment, it adds the event number to the data and sends it to the network, and each processor determines whether all data necessary for starting the program in itself have been received and checks the relation among the received data by comparison with the event numbers of the received data.

Abstract: A distributed processing system distributively performs a series of processes for a job at a plurality of processing units connected to a common transmission path and has a circuit for transmitting information from a processing unit to the common transmission path. The distributed processing system includes a circuit for receiving from the common transmission path the information required for the processing of a program stored in each processing unit, and a circuit for detecting if all the information required for the processing of the program has been collected, for performing the processing of the program using the collected information as input information for the processing and for transmitting the processed result data to the common transmission path.

Abstract: The present invention consists in that, when a program constitution in each of processors connected to a common transmission line has changed, a message to this effect is broadcast to the common transmission line, and that, when the message has been received from the common transmission line, information on programs stored in the own processor is broadcast to the common transmission line, whereby the messages indicating the program constitutions in the individual processors are automatically broadcast onto the transmission line at the changes of the constitutions of programs. Besides, in a system wherein a series of processes are executed by a plurality of programs, the relation among programs according to the flow of the series of processes can be recognized using information on the input/output data of each of the programs.