Communication system, mobile terminal and transfer device
First Claim
1. A communication system including a plurality of transfer devices for transferring packets to a current location of a mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from a transfer device through the access router device, the system comprising:
- a first transmitter for transmitting a request for information which specifies a transfer device used by the mobile terminal for packet reception and anycast address which indicates address regarding the plurality of transfer devices, to the access router device connected to the mobile terminal;
a second transmitter for transmitting the request to a transfer device which has a shortest distance from the access router device on the network among the plurality of transfer devices, based on the anycast address relayed to be transmitted through the access router device; and
a third transmitter provided at the transfer device for transmitting the information which specifies the transfer device to the mobile terminal based on the request.
1 Assignment
0 Petitions
Accused Products
Abstract
A communication system includes a MN for transmitting a request for information which specifies a MAP to be used for packet reception and anycast address regarding a plurality of MAPs to a given AR connected to the MN, routers for transmitting the request to a MAP which has a shortest distance from the given AR based on the anycast address transmitted from the given AR, and each of the MAPS for transmitting the information which specifies the MAP to the MN.
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Citations
17 Claims
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1. A communication system including a plurality of transfer devices for transferring packets to a current location of a mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from a transfer device through the access router device, the system comprising:
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a first transmitter for transmitting a request for information which specifies a transfer device used by the mobile terminal for packet reception and anycast address which indicates address regarding the plurality of transfer devices, to the access router device connected to the mobile terminal;
a second transmitter for transmitting the request to a transfer device which has a shortest distance from the access router device on the network among the plurality of transfer devices, based on the anycast address relayed to be transmitted through the access router device; and
a third transmitter provided at the transfer device for transmitting the information which specifies the transfer device to the mobile terminal based on the request. - View Dependent Claims (2)
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3. A mobile terminal used in a communication system which includes a plurality of transfer devices for transferring packets to a current location of the mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from a transfer device through the access router device, the mobile terminal comprising:
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a first transmitter for transmitting a request for information which specifies a transfer device used for packet reception and anycast address which indicates address regarding the plurality of transfer devices, to the access router device connected to the mobile terminal; and
a receiver for receiving information specifying a transfer device transmitted from the transfer device, which has a shortest distance from the access router device on the network among the plurality of transfer devices, when the request is transmitted to the transfer device based on the anycast address relayed to be transmitted through the access router device. - View Dependent Claims (4, 5, 6, 7, 8)
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9. A mobile terminal used in a communication system which includes a plurality of transfer devices for transferring packets to a current location of the mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from a transfer device through the access router device, the mobile terminal comprising:
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a first transmitter for transmitting instruction information which instructs a transfer device to execute packet transmission processing based on an on-link care of address regarding the mobile terminal, which indicates a location of the current location of the mobile terminal, and anycast address which indicates address regarding the plurality of transfer devices, to the access router device connected to the mobile terminal;
a receiver for receiving information specifying a transfer device transmitted from the transfer device, which has a shortest distance from the access router device on the network among the plurality of transfer devices, when the instruction information is transmitted to the transfer device based on the anycast address relayed to be transmitted through the access router device; and
a first acquisition unit configured to acquire the information specifying the transfer device received by the receiver as information which specifies a transfer device used for packet reception. - View Dependent Claims (10)
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11. A mobile terminal used in a communication system which includes a plurality of transfer devices for transferring packets to a current location of the mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from a transfer device through the access router device, the mobile terminal comprising:
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a first transmitter for transmitting instruction information which instructs a transfer device to execute packet transmission processing, based on a correspondence between the on-link care of address of the mobile terminal, which indicates a location of the current location of the mobile terminal, and a predetermined regional care-of address, which contains information specifying a network in which the transfer device is present, and anycast address which indicates address regarding the plurality of transfer devices, to the access router device connected to the mobile terminal; and
an acquisition unit configured to acquire the regional care-of address which has been transmitted from a transfer device, which has a shortest distance from the access router device on the network among the plurality of transfer devices, and which contains information specifying the network in which the transfer device is present, as information which specifies a transfer device used for packet reception, in a case where the predetermined regional care-of address contains no information specifying a network in which the transfer device is present when the instruction information is transmitted to the transfer device based on the anycast address relayed to be transmitted through the access router device. - View Dependent Claims (12, 13)
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14. A transfer device used in a communication system which includes a plurality of transfer devices for transferring packets to a current location of a mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from the transfer device through the access router device, comprising:
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a receiver for receiving, when the mobile terminal transmits a request of information which specifies a transfer device to be used for packet reception and anycast address which indicates address regarding the plurality of transfer devices to the access router device connected to the mobile terminal,the request and the anycast address transmitted based on the anycast address; and
a transmitter for transmitting information which specifies the transfer device to the mobile terminal based on the request. - View Dependent Claims (15)
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16. A transfer device used in a communication system which includes a plurality of transfer devices for transferring packets to a current location of a mobile terminal, a plurality of access router devices arranged in a network to be able to connect to the mobile terminal, and the mobile terminal connected to an access router device to receive the packets from the transfer device through the access router device, comprising:
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a first transmitter for transmitting packets transmitted to the mobile terminal from a communication opponent device, to the access router device, based on an on-link care of address which indicates a location of the current location of the mobile terminal;
a receiver for receiving instruction information which instructs a transfer device to execute packet transmission processing based on the on-link care of address regarding the mobile terminal transmitted from the access router device connected to the mobile terminal; and
a second transmitter for executing packet transmission processing based on the on-link care of address regarding the mobile terminal in accordance with the instruction information, and transmitting information which specifies the transfer device to the mobile terminal. - View Dependent Claims (17)
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Specification