Data communication method, data communication terminal, data communication system and communication control system
First Claim
1. A data communication method for transmitting and receiving communicated data between communication terminals over a computer network, the method comprising the steps of:
- requesting connection from a first communication terminal to said computer network via a first telephone line in order to acquire a first computer network address of said first communication terminal;
transmitting from said communication terminal communication information including at least said first computer network address to a second communication terminal via a second telephone line;
upon receipt by said second communication terminal of the communication information including said first computer network address, requesting connection from said second communication terminal to said computer network via said first telephone line in order to acquire a second computer network address of said second communication terminal;
outputting from said second communication terminal connection information including said first and said second addresses onto said computer network to request communication with said first communication terminal;
whereby communication is established between said first and said second communication terminals over said computer network; and
wherein the communication information transmitted by said first communication terminal to said second communication terminal via said second telephone line further includes encryption key information and said first and said second communication terminals encrypt transmission data using the encryption key for communication therebetween.
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Accused Products
Abstract
Prior to communication over the Internet and using a different line, a first terminal transmits to a second terminal a set of information including at least an IP address of the first terminal on the Internet. Based on the IP address thus transmitted separately, the party at the second terminal initiates communication over the Internet. This establishes direct end-to-end communication between the two terminals over the Internet. In a communication setup such as an Internet-based telephone call wherein address information about a desired party on the network is not previously known to a calling party, the inventive method allows the two parties to communicate directly with each other over the network on an end-to-end communication basis without recourse to a rendezvous server or like services.
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Citations
20 Claims
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1. A data communication method for transmitting and receiving communicated data between communication terminals over a computer network, the method comprising the steps of:
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requesting connection from a first communication terminal to said computer network via a first telephone line in order to acquire a first computer network address of said first communication terminal;
transmitting from said communication terminal communication information including at least said first computer network address to a second communication terminal via a second telephone line;
upon receipt by said second communication terminal of the communication information including said first computer network address, requesting connection from said second communication terminal to said computer network via said first telephone line in order to acquire a second computer network address of said second communication terminal;
outputting from said second communication terminal connection information including said first and said second addresses onto said computer network to request communication with said first communication terminal;
whereby communication is established between said first and said second communication terminals over said computer network; and
wherein the communication information transmitted by said first communication terminal to said second communication terminal via said second telephone line further includes encryption key information and said first and said second communication terminals encrypt transmission data using the encryption key for communication therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A data communication terminal for use in a data communication system for transmitting and receiving communicated data between communication terminals over a computer network, said data communication terminal comprising:
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address acquiring means for requesting connection to said computer network via a first telephone line in order to acquire a computer network address to identify said data communication terminal on said computer network;
transmitting means for transmitting communication information including at least said computer network address to another communication terminal via a second telephone line;
communication controlling means fore acknowledging a connection request sent by said another communication terminal over said first telephone line in order to establish communication between said data communication terminal and said another communication terminal; and
further comprising encrypting means for encrypting transmission data by a predetermined encryption method, wherein the communication information transmitted by said transmitting means to said another communication terminal includes an encryption key for designating said encryption method. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A data communication system for transmitting and receiving communicated data between a first communication terminal and a second communication terminal over a computer network, said first communication terminal comprising:
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means for requesting connection to said computer network via a first telephone line in order to acquire a first computer network address of said first communication terminal;
means for transmitting communication information including at least said first computer network address to said second communication terminal via a second telephone line; and
said second communication terminal comprising;
means for connecting to said computer network, upon receipt of the communication information including said first computer network address by said second communication terminal, via said first telephone line in order to acquire a second computer network address of said second communication terminal;
means for outputting connection information including said first and said second computer network address onto said computer network to request communication with said first communication terminal;
whereby communication is established between said first and said second communication terminals over said computer network.
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20. A communication control system comprising a remotely controlling center and a remotely controlled terminal, said remotely controlling center controlling said remotely controlled terminal via a computer network, said remotely controlling center comprising:
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means for requesting connection to said computer network via first telephone line in order to acquire a first computer network address of said remotely controlling center;
means for transmitting communication information including at least said first computer network address to said remotely controlled terminal via a second telephone line; and
said remotely controlled terminal comprising;
means for requesting connection to said computer network, upon receipt of the information including said first address, via said first telephone line in order to acquire a second computer network address of said remotely controlled terminal;
means for outputting connection information including said first and said second computer network addresses onto said computer network to request communication with said remotely controlling center;
whereby communication is established between said remotely controlling center and said remotely controlled terminal over said computer network so that said remotely controlling center may remotely control said remotely controlled terminal.
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Specification