Communication system with mobile terminal accessible to mobile communication network and local network simultaneously
First Claim
1. A communication system, comprising:
- a mobile terminal device capable of accessing both a mobile communication network and a local network simultaneously; and
a gateway device provided between a fixed communication network and the local network;
the mobile terminal device having;
an inquiry message transmission unit configured to transmit an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications to be carried out, through the local network;
the gateway device having;
a lookup unit configured to carry out a lookup processing to determine whether the location of the correspondent on networks is on the local network, or within same management domain on the fixed communication network as the mobile terminal device and outside the local network, or outside the same management domain on the fixed communication network, upon receiving the inquiry message from the mobile terminal device through the local network; and
a transmission unit configured to transmit a result of the lookup processing obtained by the lookup unit as a response message to the mobile terminal device through the local network; and
the mobile terminal device also having;
an address assignment unit configured to receive the response message from the gateway device through the local network, acquire an address to be used by the mobile terminal device in the packet communications with the correspondent according to the response message, and assign the address to a communication interface for the local network.
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Accused Products
Abstract
In a communication system using a mobile terminal capable of accessing both a mobile communication network and a local network simultaneously and a gateway provided between a fixed communication network and the local network, the mobile terminal transmits an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications, to the gateway through the local network, and receives a response message indicating the lookup processing result from the gateway through the local network. Then, the mobile terminal acquires an address to be used in the packet communications with the correspondent according to the response message, and assigns the address to a communication interface for the local network.
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Citations
20 Claims
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1. A communication system, comprising:
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a mobile terminal device capable of accessing both a mobile communication network and a local network simultaneously; and
a gateway device provided between a fixed communication network and the local network;
the mobile terminal device having;
an inquiry message transmission unit configured to transmit an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications to be carried out, through the local network;
the gateway device having;
a lookup unit configured to carry out a lookup processing to determine whether the location of the correspondent on networks is on the local network, or within same management domain on the fixed communication network as the mobile terminal device and outside the local network, or outside the same management domain on the fixed communication network, upon receiving the inquiry message from the mobile terminal device through the local network; and
a transmission unit configured to transmit a result of the lookup processing obtained by the lookup unit as a response message to the mobile terminal device through the local network; and
the mobile terminal device also having;
an address assignment unit configured to receive the response message from the gateway device through the local network, acquire an address to be used by the mobile terminal device in the packet communications with the correspondent according to the response message, and assign the address to a communication interface for the local network. - View Dependent Claims (2, 3)
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4. A mobile terminal device capable of accessing both a mobile communication network and a local network simultaneously, the mobile terminal device comprising:
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a first communication interface provided with respect to the mobile communication network;
a second communication interface provided with respect to the local network;
a packet communication unit configured to carry out first packet communications through the first communication interface and second packet communications through the second communication interface;
an inquiry message transmission unit configured to transmit an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications to be carried out, through the second communication interface; and
an address assignment unit configured to receive a response message in response to the inquiry message through the second communication interface, acquire an address to be used by the mobile terminal device in the packet communications with the correspondent according to the response message, and assign the address to the second communication interface. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16)
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12. A gateway device provided between a fixed communication network and a local network, for relaying communications of a mobile terminal device capable of accessing both a mobile communication network and the local network simultaneously, the gateway device comprising:
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a first communication interface provided with respect to the fixed communication network;
a second communication interface provided with respect to the local network;
a packet communication unit configured to carry out first packet communications through the first communication interface and second packet communications through the second communication interface;
a lookup unit configured to carry out a lookup processing to determine whether a location of a prescribed device or service on networks is on the local network, or within same management domain on the fixed communication network as a mobile terminal device and outside the local network, or outside the same management domain on the fixed communication network, upon receiving an inquiry message for inquiring information regarding the location of the prescribed device or service on networks from the mobile terminal device through the second communication interface; and
a transmission unit configured to transmit a result of the lookup processing obtained by the lookup unit as a response message to the mobile terminal device through the second communication interface.
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17. An address assignment method for a mobile terminal device capable of accessing both a mobile communication network and a local network simultaneously, the method comprising:
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transmitting an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications to be carried out, from the mobile terminal device through the local network; and
receiving a response message in response to the inquiry message through the local network at the mobile terminal device;
acquiring an address to be used by the mobile terminal device in the packet communications with the correspondent according to the response message; and
assigning the address to a communication interface for the local network at the mobile terminal device.
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18. A lookup service method of a gateway device provided between a fixed communication network and a local network, for relaying communications of a mobile terminal device capable of accessing both a mobile communication network and the local network simultaneously, the method comprising:
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carrying out a lookup processing to determine whether a location of a prescribed device or service on networks is on the local network, or within same management domain on the fixed communication network as a mobile terminal device and outside the local network, or outside the same management domain on the fixed communication network, upon receiving an inquiry message for inquiring information regarding the location of the prescribed device or service on networks from the mobile terminal device through the local network at the gateway device; and
transmitting a result of the lookup processing as a response message to the mobile terminal device through the local network from the gateway device.
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19. A computer program product for causing a computer of a mobile terminal device capable of accessing both a mobile communication network and a local network simultaneously, to execute an address assignment, the computer program product comprising:
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first computer program codes for causing the computer to transmit an inquiry message for inquiring information regarding a location on networks of a correspondent of packet communications to be carried out, from the mobile terminal device through the local network;
second computer program codes for causing the computer to receive a response message in response to the inquiry message through the local network;
third computer program codes for causing the computer to acquire an address to be used by the mobile terminal device in the packet communications with the correspondent according to the response message; and
fourth computer program codes for causing the computer to assign the address to a communication interface for the local network at the mobile terminal device.
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20. A computer program product for causing a computer of a gateway device provided between a fixed communication network and a local network, for relaying communications of a mobile terminal device capable of accessing both a mobile communication network and the local network simultaneously, to provide a lookup service, the computer program product comprising:
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first computer program codes for causing the computer to carry out a lookup processing to determine whether a location of a prescribed device or service on networks is on the local network, or within same management domain on the fixed communication network as the mobile terminal device and outside the local network, or outside the same management domain on the fixed communication network, upon receiving an inquiry message for inquiring information regarding the location of the prescribed device or service on networks from the mobile terminal device through the local network; and
second computer program codes for causing the computer to transmit a result of the lookup processing as a response message to the mobile terminal device through the local network.
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Specification