Abstract: An information communication program, an information communication apparatus and an information communication method make it possible for a mobile node to maintain direct communication with some other terminal while it is moving from a network to another if the some other terminal is always located on a particular network.

Abstract: A communication network switching device is provided between a client and a server as a intermediary mechanism to estimate a traffic and to issue a switching request for communication networks. Two switching devices include units for releasing a session in cooperation with each other and units for resuming the session in cooperation with each other. The client switching device includes a unit for connecting to a communication network to which the communication is to be switched after the session release is complete and for acquiring a new communication address assigned through the connection and a unit for notifying the server switching device of the acquired communication address. The server switching device includes a unit for identifying a server pointed to by a port number specified in a service request to transfer the service request and a unit for acquiring the new communication address acquired by the client switching device.

Abstract: In a portable phone having installed therein a PHS and a WLAN, the PHS is used for standby as long as the PHS is in the coverage area. At the time of receiving an incoming call during standby by the PHS with only the PHS being ON, the power of WLAN is turned ON. If the WLAN is in the coverage area, the incoming call is once disconnected, and immediately a VoIP call is sent (call back) by the WLAN. At this time, the PHS is turned OFF. On the other hand, if the WLAN is out of the coverage area at the time of receiving the incoming call, the call is similarly disconnected, after which the WLAN is turned OFF and the VoIP call is sent by the PHS.

Abstract: A mobile terminal which can use a plurality of communication mediums enabling a wireless call by dynamically switching between the plurality of communication mediums during a call. When the condition of communication realized by a call-through-LAN unit deteriorates and deviates from a predetermined criterion during a first call through the call-through-LAN unit, the call switch unit establishes a connection through the call-through-telephone-network unit, and switches from the first call to a second call through the call-through-telephone-network unit. Thereafter, when the condition of communication realized by the call-through-LAN unit is restored to satisfy the predetermined criterion during the second call, the call switch unit switches from the second call to a third call through the call-through-LAN unit.

Abstract: When voice communications are to be established using the telephone having the telephone number displayed on the application during the data communications, a temporary line disconnection unit disconnects a line being used for the data communications. The application is not notified of this, and the line is connected between the terminal and the telephone. The user on the mobile computer side can voice-communicate with the user of the telephone using the terminal. When the voice communications terminate, the temporary line disconnection unit connects the line between the fixed computer side and the mobile computer side to resume the data communications. Since the application is not notified of the temporary disconnection of the line, the session is set active and the data communications are not started from the very beginning.

Abstract: When voice communications are to be established using the telephone having the telephone number displayed on the application during the data communications, a temporary line disconnection unit disconnects a line being used for the data communications. The application is not notified of this, and the line is connected between the terminal and the telephone. The user on the mobile computer side can voice-communicate with the user of the telephone using the terminal. When the voice communications terminate, the temporary line disconnection unit connects the line between the fixed computer side and the mobile computer side to resume the data communications. Since the application is not notified of the temporary disconnection of the line, the session is set active and the data communications are not started from the very beginning.

Abstract: A communications terminal selection unit acquires, upon receipt of a call origination request, presence information including terminal information on terminals available to a call terminator from a presence management unit, and selects a specific terminal, if there are a plurality of terminals available to the call terminator based on the presence information, based on terminal selection information in which at least whether communication quality or charge takes priority is defined beforehand by the call terminator, notifying a call transfer unit of the selected terminal as a transfer destination terminal for call transfer.

Abstract: An apparatus for use in a radio communication system, comprising a monitoring unit which monitors whether or not a transmission request for data, designating the particular apparatus itself as a transmission destination, has been issued by the particular apparatus or another apparatus connected thereto through a network; a generation unit which operates when the monitoring unit has detected the issue of the transmission request, to generate a process to serve as a reception destination for the data and also to generate a buffer in correspondence with the process; a transfer unit which transfers the data from a transmission request source to the process in accordance with communications of virtual circuit type, so as to store the data in the buffer; and a transmission unit which transmits the data stored in the buffer, to the other apparatus through a radio channel. Thus, enhancement in the throughput of end-to-end data communications can be realized.

Abstract: A mobile node is arranged to perform a high-quality hand-over operation for eliminating an interruption time in communication and keeping the continuance of communication excellent. The mobile node has a function of interfacing with networks and includes a network quality monitor, a hand-over controller, and a network controller. The network quality monitor operates to monitor a network quality based on at least one of an intensity and a radio bandwidth of a radio wave received by network devices. The hand-over controller performs the hand-over operation of transmitting a care of address to an address registering destination in response to a state of the network quality before a communication is disconnected, changing a route of communication information, and switching a connecting destination into a new network.

Abstract: When a plurality of IP packets to be relayed, which form a TCP connection, pass through a router device, converting units rewrite part of IP address information and port number information within the packets according to a predetermined rule in cooperation with a TCP connection management database. A stream linking unit extracts the information indicating the original connection destination of a TCP connection from the packets, and links two TCP connections with streams. Converting units rewrite part of the IP address information and the port number information within a plurality of packets to form a TCP connection with an original connection destination according to a predetermined rule in cooperation with the management database.

Abstract: In a mobile communicating system, a mobile terminal has a position information detecting unit detecting position information, a position information transmitting unit transmitting position information to an information center, an up-load data transmitting unit transmitting up-load data to the information center and an information/service utilizing unit utilizing information/service from the information center.

Abstract: In a mobile communicating system, a mobile terminal has a position information detecting unit detecting position information, a position information transmitting unit transmitting position information to an information center, an up-load data transmitting unit transmitting up-load data to the information center and an information/service utilizing unit utilizing information/service from the information center.

Abstract: A communication network switching device is provided between a client and a server as a intermediary mechanism to estimate a traffic and to issue a switching request for communication networks. Two switching devices include units for releasing a session in cooperation with each other and units for resuming the session in cooperation with each other. The client switching device includes a unit for connecting to a communication network to which the communication is to be switched after the session release is complete and for acquiring a new communication address assigned through the connection and a unit for notifying the server switching device of the acquired communication address. The server switching device includes a unit for identifying a server pointed to by a port number specified in a service request to transfer the service request and a unit for acquiring the new communication address acquired by the client switching device.

Abstract: When a source subscriber activates a voice communications unit of a computer, an agent process unit in a computer center receives a data stream transmitted from a voice communications unit. The agent process unit activates a voice communications unit capable of communicating with the voice communications unit, and transfers the data stream from the voice communications unit to the voice communications unit. A network control unit transmits a telephone number stored in a telephone number storage unit. Thus, communications can be established between the computer and a telephone terminal.

Abstract: When voice communications are to be established using the telephone having the telephone number displayed on the application during the data communications, a temporary line disconnection unit disconnects a line being used for the data communications. The application is not notified of this, and the line is connected between the terminal and the telephone. The user on the mobile computer side can voice-communicate with the user of the telephone using the terminal. When the voice communications terminate, the temporary line disconnection unit connects the line between the fixed computer side and the mobile computer side to resume the data communications. Since the application is not notified of the temporary disconnection of the line, the session is set active and the data communications are not started from the very beginning.

Abstract: When a plurality of IP packets to be relayed, which form a TCP connection, pass through a router device, converting units rewrite part of IP address information and port number information within the packets according to a predetermined rule in cooperation with a TCP connection management database. A stream linking unit extracts the information indicating the original connection destination of a TCP connection from the packets, and links two TCP connections with streams. Converting units rewrite part of the IP address information and the port number information within a plurality of packets to form a TCP connection with an original connection destination according to a predetermined rule in cooperation with the management database.

Abstract: In a mobile communicating system, a mobile terminal has a position information detecting unit for detecting position information, a position information transmitting unit for transmitting the position information to an information center, an up-load data transmitting unit for transmitting up-load data to the information center and an information/service utilizing unit for utilizing information/service from the information center, whereas the information center has an accumulating unit for accumulating information/services, a retrieving unit for receiving the position information from the mobile terminal to retrieve the information/services in the accumulating unit, an accumulation controlling unit for accumulating the up-load data in the accumulating unit, and an information/service transmitting unit for taking out the information/service retrieved by the retrieving unit from the accumulating unit and transmitting it to the mobile terminal, thereby providing not only map information showing the current positi

Abstract: Agents for performing data communication controls are installed in the respective terminals of a server which offers information such as image data, and of a client who wishes to acquire the information. Agents for controlling data communications are also installed in gateways inserted in networks to which the server and the client are connected. The agents acquire information items on the transmission bands of the networks, the structures of the other networks, etc. and information items on the processing capability of the terminal of the client, etc. by such a method of exchanging dummy packets with one another. The data to be transmitted from the terminal of the server to the terminal of the client are converted on the basis of the acquired information items by the agents.

Abstract: A communication control unit connecting a terminal and a network temporarily disconnects a circuit of the network without ending a session, when no data is received from the network or when no data is transmitted to the network. In response to an occurrence of the transmitted data in the terminal or in response to an occurrence of a request for the connection of the circuit, the temporarily disconnected circuit is re-connected so that the session is resumed.