Communication network system, gateway, data communication method and program providing medium
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Abstract
This invention relates to provide a communication network system, a gateway, and a data communication method, in which the gateway has an advanced functionality. A person who issues an access request can retrieve a desired access destination easily by the following configuration: functions of routing information providing and authentication processing are added to a gateway that performs protocol conversion between two different communication networks; when an access request is issued from a public communication network such as Internet to a terminal in a local (private) communication network connected to the gateway, a request terminal is authenticated to enable prevention of unauthorized data writing and reading; and an access request user who succeeded in the authentication is provided with an active terminal list comprising accessible terminal information, or with a user condition table.
18 Citations
35 Claims
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1-16. -16. (canceled)
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17. In a communication network system, in which communication between two communication networks is made possible by involving a gateway for performing communication protocol conversion between said two communication networks communicating according to different protocols, the improvement comprising:
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the gateway being configured to receive a request to access a terminal or a registered user in a local communication network connected to the gateway from an outside communication network; and
the gateway configured to select accessible terminals from terminals or registered user terminals in the local communication network connected to the gateway, generate an active terminal list and then transmit the active terminal list to a request terminal that has performed the access request. - View Dependent Claims (18, 19, 20, 21, 22)
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23. In a gateway, in which communication protocol conversion between two communication networks communicating according to different protocols is performed, the improvement, comprising:
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the gateway receiving a request to access a terminal or a registered user in a local communication network connected to the gateway from an outside communication network; and
the gateway selects accessible terminals from terminals or registered user terminals in the local communication network connected to the gateway, generates an active terminal list, and then transmits the active terminal list to a request terminal that has performed the access request. - View Dependent Claims (24, 25, 26, 27, 28)
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29. In a data communication method in a communication network system, in which communication between two communication networks is made possible by involving a gateway for performing communication protocol conversion between said two communication networks communicating according to different protocols, the improvement comprising:
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receiving a request to access a terminal or a registered user in a local communication network connected to the gateway from an outside communication network;
selecting accessible terminals from terminals or registered user terminals in the local communication network connected to the gateway to generate an active terminal list; and
transmitting the active terminal list to a request terminal that has performed the access request. - View Dependent Claims (30, 31, 32, 33, 34)
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35. In a program providing medium, in which the medium provides a computer program for executing, a computer implemented method of data communication processing in a communication network system that enables communication between two communication networks by involving a gateway for performing communication protocol conversion between said two communication networks communicating according to different protocols, the improvement, wherein
the computer implemented method includes receiving a request to access a terminal or a registered user in a local communication network connected to the gateway from an outside communication network; -
selecting accessible terminals from terminals or registered user terminals in the local communication network connected to the gateway to generate an active terminal list; and
transmitting the active terminal list to a request terminal that has performed the access request.
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Specification