Abstract: A communication device conforming with plural communication standards and having a storage storing a plurality of virtual stacks each having an application program and communication program that implements a protocol stack for communication by the application program. An executor executes the virtual stacks, and a switching controller switches the virtual stacks to be executed by performing a first processing in which at least one part of at least one of the virtual stacks is read from storage and stored into a memory of, and executed by, the executor. Then, in accordance with free capacity in the memory, at least one part of at least one of the virtual stacks executed in the first processing is deleted from memory. In a second processing at least one part of at least one of the virtual stacks is read from the storage and stored into the memory of, and executed by, the executor.

Abstract: A position information authoring system according to one aspect of the present invention includes a plurality of position information devices in a plant and a position information authoring apparatus. Each of the plurality of position information devices is configured to input a position information into the position information authoring apparatus, the position information represents a three-dimensional absolute position of each of the plurality of position information devices. The position information authoring apparatus is configured to manage a physical position of each physical equipment in the plant and physical positions of the plurality of position information devices, based on a three-dimensional plant model which includes virtual equipments and marks a virtual position of each of the plurality of position information devices.

Abstract: A communication system constructs a communication network using a hopping pattern designated in a router advertisement between a wireless communication device that transmits the router advertisement designating the hopping pattern of channel hopping and an opposite party communication device that receives the router advertisement. The wireless communication device comprises a receiver configured to receive a router advertisement transmitted from another wireless communication device, a generator configured to generate the hopping pattern that does not use the same channel at the same time with respect to a hopping pattern that is designated by the router advertisement received by the receiver, and a transmitter configured to transmit the router advertisement that designates the hopping pattern generated by the generator.

Abstract: A communication device communicating in conformance with a prescribed communication standard. The device includes a storage storing at least a first virtual program that includes a program implementing a first function of the communication device and a second virtual program that includes a program implementing a second function of the communication device. It also includes an executor configured to successively execute the first and second virtual programs, and a switching controller configured to read at least a part of either one of the first and second virtual programs from the storage, to store the part of either one of the first and second virtual programs into a memory of the executor, to execute the part of either one of the first and second virtual programs in the executor, thereby, to switch the first and second virtual programs to be executed in the executor.

Abstract: An ultrasonic pipe measurement apparatus includes: a plurality of ultrasonic transceivers discretely disposed on a pipe wall of a pipe; and a control unit configured to control the plurality of ultrasonic transceivers and detect a generation point of damage caused in the pipe based on an ultrasonic signal exchanged between the ultrasonic transceivers.

Abstract: A position information authoring system according to one aspect of the present invention includes a plurality of position information devices in a plant and a position information authoring apparatus. Each of the plurality of position information devices is configured to input a position information into the position information authoring apparatus, the position information represents a three-dimensional absolute position of each of the plurality of position information devices. The position information authoring apparatus is configured to manage a physical position of each physical equipment in the plant and physical positions of the plurality of position information devices, based on a three-dimensional plant model which includes virtual equipments and marks a virtual position of each of the plurality of position information devices.

Abstract: A management apparatus, which manages a wireless network constituted by a plurality of wireless communication devices each capable of performing a wireless communication using TDMA system, is characterized by comprising an extended link management unit that manages an extended link obtained by setting, to a link for which a channel and time slots to be used for wireless communications using the TDMA system are specified and for which a communication direction is determined, attribute information that characterizes the wireless communications performed by the wireless communication devices by use of the link.

Abstract: An information collection system includes an information collection terminal and an information collection server. The an information collection terminal includes an obtainer configured to obtain specification information for specifying a non-connection device which is not connected to a system which is capable of collecting information, a display configured to display an information input screen according to the specification information, an input device configured to input information of the non-connection device into the information input screen, and a communicator configured to transmit, to a network, input information which has been input into the information input screen. The information collection server includes a first collector configured to collect the input information transmitted from the information collection terminal through the network.

Abstract: An information search system includes a terminal device and a communicator. The terminal device includes an obtainer, a processor, and a communicator. The obtainer obtains device specification information which is necessary for specifying a device installed in a plant. The processor obtains first information and second information. The first information is identification information of the device specified by using the device specification information. The second information represents a storage place of information which is necessary for maintaining the device. The communicator transmits the first information and the second information to a network. The, search server specifies a search place based on the second information transmitted from the terminal device through the network. The search server searches the search place by using the first information as a key. The search server transmits a search result to the terminal device.

Abstract: A provisioning device connected to field devices, which are objects of provisioning, via a provisioning network separated from a target network may include a router advertisement unit that designates a field device, which is an object of provisioning, among the field devices located within a router advertisement zone of the provisioning device to transmit a router advertisement to the designated field device in a unicast mode, a connection control unit that controls a connection to the provisioning network of the field device that receives the router advertisement, and a parameter setting unit that performs setting of network parameters in the field device, the network parameters being managed by the field device.

Abstract: A packet forwarding device performs forwarding of a packet between first and second wireless communication networks to which different identifiers are attached, and includes: a relay network that is interposed between the first and second wireless communication networks; a first processing unit that is connected to the first wireless communication network and performs first routing control by using first routing information in which the first wireless communication network and the relay network are defined as outgoing interfaces; and a second processing unit that is connected to the second wireless communication network and performs second route control by using second routing information in which the second wireless communication network and the relay network are defined as outgoing interfaces.

Abstract: A communication device conforming with plural communication standards and having a storage storing a plurality of virtual stacks each having an application program and communication program that implements a protocol stack for communication by the application program. An executor executes the virtual stacks, and a switching controller switches the virtual stacks to be executed by performing a first processing in which at least one part of at least one of the virtual stacks is read from storage and stored into a memory of, and executed by, the executor. Then, in accordance with free capacity in the memory, at least one part of at least one of the virtual stacks executed in the first processing is deleted from memory. In a second processing at least one part of at least one of the virtual stacks is read from the storage and stored into the memory of, and executed by, the executor.

Abstract: A communication device communicating in conformance with a prescribed communication standard includes a storage storing at least a first virtual program that includes a program implementing a first function of the communication device and a second virtual program that includes a program implementing a second function of the communication device, an executer configured to successively execute the first and second virtual programs, and a switching controller configured to read at least a part of either one of the first and second virtual programs from the storage, to store the part of either one of the first and second virtual programs into a memory of the executer, to execute the part of either one of the first and second virtual programs in the executer, after completion of the processing of the one virtual program, to delete at least a part of the one virtual program from the memory in accordance with free area in the memory, to read at least a part of the other virtual program of the first and second virtua

Abstract: An ultrasonic pipe measurement apparatus includes: a plurality of ultrasonic transceivers discretely disposed on a pipe wall of a pipe; and a control unit configured to control the plurality of ultrasonic transceivers and detect a generation point of damage caused in the pipe based on an ultrasonic signal exchanged between the ultrasonic transceivers.

Abstract: A management apparatus, which manages a wireless network constituted by a plurality of wireless communication devices each capable of performing a wireless communication using TDMA system, is characterized by comprising an extended link management unit that manages an extended link obtained by setting, to a link for which a channel and time slots to be used for wireless communications using the TDMA system are specified and for which a communication direction is determined, attribute information that characterizes the wireless communications performed by the wireless communication devices by use of the link.

Abstract: A wireless communication apparatus for performing wireless communication between wireless devices via a wireless communication network, wherein the wireless communication apparatus comprises: a packet processor for generating a first packet including first control information and discrimination information for discriminating between the first control information for connecting to the wireless communication network a set wireless device, which is a wireless device for which the setting of instrument information required for accessing the wireless communication network has been performed, and second control information for connecting to the wireless communication network a setting-required wireless device, which is a wireless device for which there is a need to set instrument information, and a second packet including the discrimination information and the second control information; and a wireless communication unit for transmitting the first packet and the second packet generated by the packet processor to th

Abstract: A packet forwarding device performs forwarding of a packet between first and second wireless communication networks to which different identifiers are attached, and includes: a relay network that is interposed between the first and second wireless communication networks; a first processing unit that is connected to the first wireless communication network and performs first routing control by using first routing information in which the first wireless communication network and the relay network are defined as outgoing interfaces; and a second processing unit that is connected to the second wireless communication network and performs second route control by using second routing information in which the second wireless communication network and the relay network are defined as outgoing interfaces.

Abstract: In a field control system in which a plurality of field equipments that are operated in a previously set schedule and constitute a control loop perform a packet communication via a network, there is provided a configurator for collecting measured result packets to which a time stamp of each field equipment is affixed respectively, grasping at least any one of communication times between respective field equipments based on the time stamp, and adjusting operation schedules of respective field equipments in response to the communication times.

Abstract: A provisioning device connected to field devices, which are objects of provisioning, via a provisioning network separated from a target network may include a router advertisement unit that designates a field device, which is an object of provisioning, among the field devices located within a router advertisement zone of the provisioning device to transmit a router advertisement to the designated field device in a unicast mode, a connection control unit that controls a connection to the provisioning network of the field device that receives the router advertisement, and a parameter setting unit that performs setting of network parameters in the field device, the network parameters being managed by the field device.

Abstract: There is provided an IP network system. The IP network system includes: a plurality of relays making up a ring network; a source host for transmitting a packet and connected to the ring network; and a destination host which conducts a packet communication with the source host through the ring network. Each of the relays is operable to transfer received packets containing a transfer direction information to the destination host through a right-handed route of the ring network and through a left-handed route of the ring network, based on the transfer direction information.