COMMUNICATION SYSTEM, TERMINAL CONTROL UNIT AND COMMUNICATION METHOD
First Claim
1. A communication system having a mobile unit, a terminal control unit for managing information about the mobile unit, and a mobile unit relay unit for transferring data transmitted from the mobile unit to another relay unit depending on source IP address, whereinthe mobile unit relay unit includes:
- a communication information storing unit which stores a terminal identifier for identifying the mobile unit for every relay unit, which is notified from the terminal control unit to the mobile unit depending on a request from the mobile unit and a mobile IP address assigned to the mobile unit for every terminal identifier; and
an IP address transmitting unit which transmits the mobile IP address stored in the communication information storing unit correspondingly to the terminal identifier, to the mobile unit, upon receipt of an IP address assignment request and the terminal identifier of the mobile unit from the mobile unit, andthe mobile unit includes;
a communication unit which establishes communication with a predetermined terminal, with the mobile IP address received from the IP address transmitting unit as the source IP address.
1 Assignment
0 Petitions
Accused Products
Abstract
A terminal control unit and method are provided. The terminal control unit which manages information about a mobile unit which transmits data to a relay unit of transferring data to another relay unit depending on source IP address, includes a terminal communication information storing unit which stores a destination IP address and a terminal identifier for identifying the mobile unit for every relay unit; and a terminal identifier transmitting unit which transmits a combination of the destination IP address and the terminal identifier stored in the terminal communication information storing unit to the mobile unit, upon receipt of a terminal identifier assignment request from the mobile unit, requesting assignment of the terminal identifier to the mobile unit.
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Citations
17 Claims
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1. A communication system having a mobile unit, a terminal control unit for managing information about the mobile unit, and a mobile unit relay unit for transferring data transmitted from the mobile unit to another relay unit depending on source IP address, wherein
the mobile unit relay unit includes: -
a communication information storing unit which stores a terminal identifier for identifying the mobile unit for every relay unit, which is notified from the terminal control unit to the mobile unit depending on a request from the mobile unit and a mobile IP address assigned to the mobile unit for every terminal identifier; and an IP address transmitting unit which transmits the mobile IP address stored in the communication information storing unit correspondingly to the terminal identifier, to the mobile unit, upon receipt of an IP address assignment request and the terminal identifier of the mobile unit from the mobile unit, and the mobile unit includes; a communication unit which establishes communication with a predetermined terminal, with the mobile IP address received from the IP address transmitting unit as the source IP address. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A terminal control unit which manages information about a mobile unit which transmits data to a mobile unit relay unit of transferring data to another relay unit depending on source IP address, comprising:
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a terminal communication information storing unit which stores a destination IP address and a terminal identifier for identifying the mobile unit for every relay unit; and a terminal identifier transmitting unit which transmits a combination of the destination IP address and the terminal identifier stored in the terminal communication information storing unit to the mobile unit, upon receipt of a terminal identifier assignment request from the mobile unit, requesting assignment of the terminal identifier to the mobile unit.
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10. A communication method among a mobile unit, a terminal control unit for managing information about the mobile unit, and a mobile unit relay unit for transferring data transmitted from the mobile unit to another relay unit depending on source IP address, wherein
the terminal control unit includes: -
a terminal identifier transmitting process of transmitting a combination of a destination IP address and a terminal identifier stored in a terminal communication information storing unit which stores the destination IP address and the terminal identifier, to the mobile unit, upon receipt of a terminal identifier assignment request from the mobile unit, requesting assignment of the terminal identifier for identifying the mobile unit for every relay unit to the mobile unit, the mobile unit relay unit includes; an IP address transmitting process of transmitting a mobile IP address to the mobile unit, the mobile IP address being stored in the communication information storing unit for storing a terminal identifier and the mobile IP address that is the IP address assigned to the mobile unit for every terminal identifier, correspondingly to the terminal identifier, upon receipt of the terminal identifier of the mobile unit from the mobile unit together with an IP address assignment request requesting assignment of the IP address to the mobile unit, and the mobile unit includes; a terminal identifier assignment requesting process of transmitting the terminal identifier assignment request to the terminal control unit; an IP address assignment requesting process of, in establishing communication with a predetermined terminal, specifying a terminal identifier with the destination IP address corresponding to the IP address of the predetermined terminal, from the combinations of the destination IP address and the terminal identifier transmitted through the terminal identifier transmitting process and transmitting the IP address assignment request including the specified terminal identifier to the mobile unit relay unit; and a communication process of establishing communication with the predetermined terminal with the IP address transmitted through the IP address transmitting process as the source IP address. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A system comprising:
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a mobile unit relay unit including a storing unit which stores an identifier for a first mobile unit for every relay unit; and a transmitting unit which transmits a mobile IP address corresponding to the identifier to a second mobile unit upon receipt of an IP address assignment request and the identifier, wherein the second mobile unit establishes communication with a terminal with the IP address received from the IP address transmitting unit as the source IP address.
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17. A communication method comprising:
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transmitting a destination IP address and a terminal identifier upon receiving a request for assignment of the terminal identifier for every relay unit to the mobile unit; transmitting a mobile IP address to a mobile unit upon receipt of the terminal identifier of the mobile unit from the mobile unit together with an IP address assignment request requesting assignment of the IP address to the mobile unit, and transmitting a terminal identifier assignment request; specifying a terminal identifier with a terminal IP address from combinations of a destination IP address and the terminal identifier; transmitting an IP address assignment request including the specified terminal identifier; and communicating with a terminal with the transmitted IP address.
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Specification