JP4105215B2 - Mobile communication control system, network management server, mobile node, access node and anchor node - Google Patents

Description

  The present invention relates to a mobile communication control system, a network management server, a mobile node, an access node, and an anchor node.

  Conventionally, a mobile communication control system using Mobile IP (MIP) based Bidirectional-Tunnel technology is known (for example, see Non-Patent Document 1).

  A mobile communication control system using the MIP based Bidirectional-Tunnel technology will be described with reference to FIGS. 18 and 19.

  As shown in FIG. 18, the mobile communication control system wirelessly transmits to a mobile node MN from a mobile terminal (source mobile communication terminal) MT # 1 that is wirelessly connected to an access node (source access node) AN # 1. The packet is transferred to the connected mobile terminal (destination mobile communication terminal) MT # 2.

  Here, with reference to FIG. 19, the operation | movement which transfers a packet in this mobile communication control system is demonstrated.

  As shown in FIG. 19, in step 1801, the mobile terminal MT # 1 sends the care-of address CoA (Care of Address) and home address HoA (Home Address) of the mobile terminal MT # 2 to the packet header via the wireless communication line. Is transmitted to the access node AN # 1.

  Here, it is assumed that the mobile terminal MT # 1 has already acquired the care-of address CoA of the mobile terminal MT # 2 including the location information of the mobile terminal MT # 2 from the mobile terminal MT # 2.

  In step 1802, the access node AN # 1 transfers the received packet a to the home agent HA of the mobile node MN described above via the core network 1 based on the care-of address CoA of the mobile terminal MT # 2. To do.

  In step 1803, the home agent HA encapsulates (capsules) the packet b encapsulated with the mobile node MN based on the care-of address CoA and the home address HoA of the mobile terminal MT # 2 described above and the access to the core network 1 and the access. The data is transferred to the mobile node MN via the node AN # 2.

  In step 1804, the mobile node MN transmits the packet c, which has been decapsulated (decapsulated) for the received packet b, to the mobile terminal MT # 2 via the wireless communication line (mobile network 2).

  Also, a mobile communication control system using Mobile IP (MIP) based Source routing technology is known (for example, see Non-Patent Document 2).

  A mobile communication control system using the MIP based Source routing technology will be described with reference to FIGS. 18 and 20.

  As shown in FIG. 18, the mobile communication control system wirelessly transmits to a mobile node MN from a mobile terminal (source mobile communication terminal) MT # 1 that is wirelessly connected to an access node (source access node) AN # 1. The packet is transferred to the connected mobile terminal (destination mobile communication terminal) MT # 2.

  Here, with reference to FIG. 20, the operation | movement which transfers a packet in this mobile communication control system is demonstrated.

  As shown in FIG. 20, in step 1901, the mobile terminal MT # 1 receives the care-of address CoA of the mobile node MN, the care-of address CoA of the mobile terminal MT # 2, and the home of the mobile terminal MT # 2 via the wireless communication line. The packet a in which the address HoA is set in the packet header is transmitted to the access node AN # 1.

  Here, the mobile terminal MT # 1 is aware of the mobile node MN including the care-of address CoA of the mobile terminal MT # 2 including the location information of the mobile terminal MT # 2 and the location information of the mobile node MN from the mobile terminal MT # 2. It is assumed that the address CoA has already been acquired.

In step 1902, the mobile node MN sets the received packet a as a packet header with the care-of address CoA of the mobile terminal MT # 2, the care-of address CoA of the mobile node MN, and the home address HoA of the mobile terminal MT # 2. b is converted and transmitted to the mobile terminal MT # 2 through the wireless communication line (mobile network 2).
The Internet Society, "Mobile Router Tunneling Protocol", http://www.nal.motlabs.com/nemo/drafts-kniveton-mobiletr.txt The Internet Society, "IPv6 Reserving Routing Header and it's application to Mobile Networks", http://www.nal.motorlabs.com/nemo/drafts/frfts

  However, in the mobile communication control system using the conventional MIP based Bidirectional-Tunnel technology, there is a problem that the header size of the packet becomes large because the encapsulation process is performed as described above.

  Further, in such a mobile communication control system, there is a problem that route optimization cannot be realized because the packet always passes through the home agent HA of the mobile node MN.

  Further, in this mobile communication control system, since it is necessary to notify the source mobile terminal MT # 1 of the care-of address CoA of the destination mobile terminal MT # 2 including the location information of the destination mobile terminal MT # 2, location privacy is improved. There was a problem that it could not be planned.

  In the mobile communication control system using the conventional MIP based Source routing technique, the source mobile terminal MT # 1 sets the care-of address CoA of the mobile node MN and the care-of address CoA of the destination mobile terminal MT # 2 in the packet header. Therefore, there is a problem that the header size of the packet becomes large.

  In the mobile communication control system, the source mobile terminal MT # 1 includes the care-of address CoA of the destination mobile terminal MT # 2 including the location information of the destination mobile terminal MT # 2 and the mobile including the location information of the mobile node MN. Since it is necessary to notify the care-of address of the node CoA, there is a problem that location privacy cannot be achieved.

  Therefore, the present invention has been made in view of the above points, and a mobile communication control system, a network management server, a mobile node, and a mobile node for solving the above-described packet header size problem, route optimization problem, and location privacy problem, An object is to provide an access node and an anchor node.

  A first feature of the present invention is a mobile communication control system comprising a plurality of access nodes and a mobile node, wherein a source access node to which a source mobile communication terminal is wirelessly connected is wirelessly connected to the mobile node. An address management unit for managing the first address and the second address of the connected destination mobile communication terminal in association with each other, and the destination movement set as a destination address in a packet transmitted from the source mobile communication terminal Based on the converted destination address, an address conversion unit that converts the first address of the communication terminal to the second address of the destination mobile communication terminal associated with the first address of the destination mobile communication terminal A route for routing the packet to a destination access node to which the mobile node is wirelessly connected. And the destination access node is set as a destination address in the received packet, and an address management unit that manages the second address and the third address of the destination mobile communication terminal in association with each other An address conversion unit that converts the second address of the destination mobile communication terminal into a third address of the destination mobile communication terminal associated with the second address of the destination mobile communication terminal; and the converted destination A routing unit that routes the packet to the mobile node based on an address, and the mobile node associates and manages a first address and a third address of the destination mobile communication terminal And the destination mobile communication set as a destination address in the received packet An address conversion unit that converts the third address at the end to the first address of the destination mobile communication terminal associated with the third address of the destination mobile communication terminal, and based on the converted destination address And a packet transfer unit for transferring the packet to the destination mobile communication terminal.

  According to this invention, in packet transfer from the source mobile communication terminal to the destination mobile communication terminal, the address conversion unit of the source access node sets the first address of the destination mobile communication terminal set in the packet to the first address. The address conversion unit of the destination access node converts the second address of the destination mobile communication terminal set in the packet to the third address, and the address conversion unit of the mobile node Since the third address of the destination mobile communication terminal set in is converted into the first address, the problem that the header size of the packet becomes large can be solved.

  According to the invention, the packet is transferred from the source mobile communication terminal to the destination mobile communication terminal via the source access node, the destination access node, and the mobile node without going through the home agent of the mobile node. Therefore, the problem that route optimization cannot be realized can be solved.

  Moreover, according to this invention, since the origination mobile communication terminal should just set the 1st address (home address) of a mobile communication terminal as a destination address, the problem of location privacy can be solved.

  In the first aspect of the present invention, the mobile node includes a network management server, and the mobile node responds to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the third address. An address allocation information transmitting unit configured to transmit address allocation information about the new mobile communication terminal to the network management server, the network management server responding to the received address allocation information with the new mobile communication An address management unit that associates and manages the first address, the second address, and the third address of the terminal; and the address assignment for the new mobile communication terminal to the source access node and the destination access node An address assignment instruction transmitter for transmitting the instruction, and an address of the source access node. The management unit associates and manages the first address and the second address of the new mobile communication terminal according to the address allocation instruction, and the address management unit of the destination access node responds to the address allocation instruction. The second address and the third address of the new mobile communication terminal are preferably managed in association with each other.

  Further, in the first feature of the present invention, the network management server is provided, and the destination access node sends the network management server to the mobile node in response to an address assignment request transmitted from the mobile node. An address allocation information transmitting unit configured to transmit address allocation information for all mobile communication terminals that are wirelessly connected; and the network management server determines whether all the mobile communication terminals are in accordance with the received address allocation information. An address management unit that associates and manages a first address, a second address, and a third address; and an address assignment instruction that transmits an address assignment instruction for all the mobile communication terminals to the source access node The address management unit of the source access node includes the address. Depending on those instructions, it is preferable to administer in association with the first address and the second address of the all mobile communication terminals.

  A second feature of the present invention is a network management server installed in a mobile communication network that transfers packets to a destination mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to a destination access node. An address management unit for managing the first address, the second address, and the third address of the destination mobile communication terminal in association with the address assignment information received from the mobile node; Instructing the source access node to which the communication terminal is wirelessly connected to manage the first address and the second address of the destination mobile communication terminal in association with each other. An address assignment instruction is sent to instruct to manage the second address and the third address of the destination mobile communication terminal in association with each other. And summarized in that comprises an address assignment direction transmitter configured to.

  A third feature of the present invention is a network management server installed in a mobile communication network that transfers packets to a destination mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to a destination access node. An address management unit for managing the first address, the second address, and the third address of the destination mobile communication terminal in association with the address assignment information received from the destination access node; Address assignment instruction for sending an address assignment instruction to instruct the source access node to which the mobile communication terminal is wirelessly connected to manage the first address and the second address of the destination mobile communication terminal in association with each other The gist is to include a transmission unit.

  A fourth feature of the present invention is that a source mobile communication terminal wirelessly connected to a source access node is connected to a destination mobile communication terminal wirelessly connected to a mobile node wirelessly connected to a destination access node. A mobile node installed in a mobile communication network for transferring packets, the address management unit managing the first address and the third address of the destination mobile communication terminal in association with each other, and the source access node The third address of the mobile communication terminal set as the destination address in the transmitted packet is converted to the first address of the mobile communication terminal associated with the third address of the mobile communication terminal Based on the address conversion unit and the converted destination address, the packet is transferred to the destination mobile communication terminal. In response to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the third address, and to the network management server, the first address of the new mobile communication terminal And an address assignment information transmitting unit for transmitting address assignment information including the third address and the third address.

  A fifth feature of the present invention is an access node installed in a mobile communication network that transfers packets to a destination mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to the access node. An address management unit that associates and manages the second address and the third address of all destination mobile communication terminals that are wirelessly connected to the mobile node, and the source access that the source mobile communication terminal is wirelessly connected to The second address of the destination mobile communication terminal set as the destination address in the packet received from the node is the third address of the destination mobile communication terminal associated with the second address of the destination mobile communication terminal. An address conversion unit that converts the address to the mobile node based on the converted destination address; Address assignment information including a second address and a third address of the destination mobile communication terminal to a network management server in response to an address assignment request transmitted from the mobile node and a routing unit for routing the packet And an address assignment notifying unit for transmitting.

  A sixth feature of the present invention is a mobile communication control system comprising a plurality of access nodes, anchor nodes, and mobile nodes, wherein the source access node to which the source mobile communication terminal is wirelessly connected is the mobile An address management unit that associates and manages a first address and a second address of a destination mobile communication terminal that is wirelessly connected to the node, and is set as a destination address in a packet transmitted from the source mobile communication terminal An address conversion unit that converts the first address of the destination mobile communication terminal to the second address of the destination mobile communication terminal associated with the first address of the destination mobile communication terminal; and the converted destination A routing unit for routing the packet to the anchor node based on an address; The anchor node is transmitted from the source access node, an address management unit that manages the second address and the third address of the destination mobile communication terminal in association with the encapsulation information that identifies the mobile node, and Converting the second address of the destination mobile communication terminal set as the destination address in the packet to the third address of the destination mobile communication terminal associated with the second address of the destination mobile communication terminal; Based on the encapsulation information, the mobile node encapsulates the packet in which the destination address is translated with the encapsulation information associated with the second address of the destination mobile communication terminal. A routing unit that routes the packet to a connected destination access node; When the destination access node decapsulates the received packet and the address management unit that manages the encapsulation information, and the third address of the destination communication terminal is included in the packet A routing unit for routing the packet to the mobile node specified by the encapsulation information encapsulated in the packet, wherein the mobile node is a first mobile communication terminal An address management unit that manages an address and a third address in association with each other, and a third address of the destination mobile communication terminal that is set as a destination address in the received packet. An address conversion unit that converts the address to the first address of the destination mobile communication terminal associated with And a packet transfer unit that transfers the packet to the destination mobile communication terminal based on the converted destination address.

  According to this invention, in packet transfer from the source mobile communication terminal to the destination mobile communication terminal, the address conversion unit of the source access node sets the first address of the destination mobile communication terminal set in the packet to the first address. The address conversion unit of the anchor node converts the second address of the destination mobile communication terminal set in the packet into the third address, and encapsulates it with the encapsulation information. Since the address conversion unit of the node converts the third address of the destination mobile communication terminal set in the packet into the first address, the packet address is changed in the wireless section between the destination access node and the destination mobile communication terminal. The problem that the header size becomes large can be solved.

  According to the invention, the packet is transmitted from the source mobile communication terminal to the destination mobile communication terminal via the source access node, the anchor node, the destination access node, and the mobile node without going through the home agent of the mobile node. Since it is transferred, the problem that route optimization cannot be realized can be solved.

  Moreover, according to this invention, since the origination mobile communication terminal should just set the 1st address (home address) of a mobile communication terminal as a destination address, the problem of location privacy can be solved.

  In a sixth aspect of the present invention, the mobile node comprises a network management server, and the mobile node responds to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the third address. An address allocation information transmitting unit configured to transmit address allocation information about the new mobile communication terminal to the network management server, the network management server responding to the received address allocation information with the new mobile communication For the address management unit that manages the first address, the second address, the third address of the terminal, and the encapsulation information that identifies the mobile node, and the source access node and the anchor node, An address assignment instruction transmitting unit for sending an address assignment instruction for the new mobile communication terminal; The address management unit of the source access node associates and manages the first address and the second address of the new mobile communication terminal according to the address assignment instruction, and the address management unit of the anchor node However, it is preferable that the second address, the third address, and the encapsulation information of the new mobile communication terminal are associated and managed in response to the address assignment instruction.

  In the sixth aspect of the present invention, the network management server is provided, and the destination access node includes the encapsulation information for the network management server in response to an address assignment request transmitted from the mobile node. A first address of all mobile communication terminals wirelessly connected to the mobile node according to the received address assignment information, comprising an address assignment information sending unit for sending address assignment information; An address management unit that associates and manages the second address, the third address, and the encapsulation information, and an address assignment instruction that transmits an address assignment instruction for all the mobile communication terminals to the anchor node And an address management unit of the anchor node includes the address allocation unit. Depending on the instruction, it is preferable to administer in association with the second address and the third address of all the mobile communication terminal and the encapsulation information.

  According to this invention, the address management unit of the destination access node does not manage the second address and the third address of all the destination mobile communication terminals that are wirelessly connected to the mobile node. When the destination access node to be wirelessly connected is changed (that is, at the time of handover), the change of the management contents of the address translation unit can be minimized, and the handover delay can be minimized.

  A seventh feature of the present invention is installed in a mobile communication network that transfers packets via an anchor node to a mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to a destination access node. A network management server, wherein the first address, the second address, the third address, and the mobile node of the new mobile communication terminal according to the address assignment information for the new mobile communication terminal received from the mobile node An address management unit that associates and manages the encapsulation information that identifies the source information, and a source access node to which the source mobile communication terminal is wirelessly connected, and a first address and a second address of the new mobile communication terminal An address assignment instruction that instructs to associate and manage addresses is transmitted, and A gist is provided with an address allocation instruction transmitting unit that transmits an address allocation instruction that instructs to associate and manage the second address and the third address of the new mobile communication terminal and the encapsulation information. .

  An eighth feature of the present invention is installed in a mobile communication network that transfers packets via an anchor node to a mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to a destination access node. A network management server, wherein the first address, the second address, and the third address of all mobile communication terminals that are wirelessly connected to the mobile node according to the address assignment information received from the destination access node And an address management unit that associates and manages the encapsulation information specifying the mobile node, and the second address, the third address, and the encapsulation information of all the mobile communication terminals for the anchor node, An address assignment instruction transmitting unit for sending an address assignment instruction instructing to manage the association The gist of the Rukoto.

  A ninth feature of the present invention is that it is installed in a mobile communication network that transfers packets via an anchor node to a destination mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to a destination access node. An address management unit that manages encapsulation information that identifies the mobile node, and the packet received from the anchor node includes the address of the destination mobile communication terminal, A gist of the invention is that the mobile node specified by the encapsulation information used for encapsulation includes a routing unit that routes the decapsulated packet.

  A tenth feature of the present invention is provided in a mobile communication network that transfers packets via an anchor node to a destination mobile communication terminal that is wirelessly connected to a mobile node that is wirelessly connected to a destination access node. An address management unit that associates and manages the second address and the third address of the destination mobile communication terminal and the encapsulation information that identifies the mobile node, and the source mobile communication terminal wirelessly The second address of the destination mobile communication terminal set as the destination address in the packet transmitted from the connected source access node is the destination associated with the second address of the destination mobile communication terminal The packet is converted to the third address of the mobile communication terminal, and the destination address is converted. An address translation unit encapsulating with the encapsulation information associated with the second address of the terminal, and routing for routing the encapsulated packet to the destination access node based on the encapsulation information It is made a summary.

  An eleventh feature of the present invention is a mobile communication control system comprising a plurality of access nodes and mobile nodes, wherein a source access node to which a source mobile communication terminal is wirelessly connected is wirelessly connected to the mobile node. An address management unit for managing the first address and the second address of the connected destination mobile communication terminal in association with each other, and the destination movement set as a destination address in a packet transmitted from the source mobile communication terminal Based on the converted destination address, an address conversion unit that converts the first address of the communication terminal to the second address of the destination mobile communication terminal associated with the first address of the destination mobile communication terminal A routing unit for routing the packet to the mobile node. An address management unit that associates and manages a first address and a second address of the destination mobile communication terminal, and a second address of the destination mobile communication terminal set as a destination address in the received packet Is converted to the first address of the destination mobile communication terminal associated with the second address of the destination mobile communication terminal, and the destination mobile communication terminal based on the converted destination address And a packet transfer unit for transferring the packet.

  According to this invention, in packet transfer from the source mobile communication terminal to the destination mobile communication terminal, the address conversion unit of the source access node sets the first address of the destination mobile communication terminal set in the packet to the first address. Since the address conversion unit of the mobile node converts the second address of the destination mobile communication terminal set in the packet to the first address, the header size of the packet increases. The point can be solved.

  According to the invention, the packet is transferred from the source mobile communication terminal to the destination mobile communication terminal via the source access node, the destination access node, and the mobile node without going through the home agent of the mobile node. Therefore, the problem that route optimization cannot be realized can be solved.

  Moreover, according to this invention, since the origination mobile communication terminal should just set the 1st address (home address) of a mobile communication terminal as a destination address, the problem of location privacy can be solved.

  Further, according to this invention, the packet transfer delay can be minimized by minimizing the address translation points.

  In an eleventh aspect of the present invention, a destination access node to which the mobile node is wirelessly connected is located in an address area assigned to the destination access node in response to an address assignment request transmitted from the mobile node. From the new mobile communication terminal that has an address allocation unit that allocates a predetermined address area to the mobile node, and the address management unit of the mobile node does not manage the first address and the second address. In response to the received address assignment request, the second address of the new mobile communication terminal is associated with the second address of the new mobile communication terminal by assigning the second address of the new mobile communication terminal from the predetermined address area. It is preferable to manage.

  Further, according to this invention, by selecting the second address of the destination mobile communication terminal from a predetermined address area (subnetwork address belonging to the network address) in the address area assigned to the destination access node, Transparency from the mobile communication network can be provided to the mobile node.

  A twelfth feature of the present invention is a mobile node installed in a mobile communication network for transferring packets to a destination mobile communication terminal wirelessly connected to a mobile node wirelessly connected to a destination access node. An address management unit that associates and manages the first address and the second address of the destination mobile communication terminal, and a destination in the packet transmitted from the source access node to which the source mobile communication terminal is wirelessly connected. An address conversion unit that converts the second address of the mobile communication terminal set as an address into the first address of the mobile communication terminal associated with the second address of the mobile communication terminal; A packet transfer unit for transferring the packet to the destination mobile communication terminal based on the destination address. In the predetermined address area allocated by the destination access node in response to an address allocation request transmitted from a new mobile communication terminal that does not manage the first address and the second address by the address management unit. And assigning the second address of the new mobile communication terminal to manage the first address and the second address of the new mobile communication terminal in association with each other.

  A thirteenth feature of the present invention is an access node installed in a mobile communication network for transferring packets to a destination mobile communication terminal wirelessly connected to a mobile node wirelessly connected to the access node. An address allocation unit that allocates a predetermined address area to the mobile node from among the address areas allocated to the destination access node in response to an address allocation request transmitted from the mobile node. The gist.

  A fourteenth feature of the present invention is a network management server installed in a mobile communication network for transferring packets to a mobile communication terminal wirelessly connected to a mobile node wirelessly connected to a destination access node. The gist is to collectively manage the addresses of the plurality of mobile communication terminals wirelessly connected to the mobile node.

  As described above, according to the present invention, a mobile communication control system, a network management server, a mobile node, an access node, and an anchor node for solving a packet header size problem, a route optimization problem, and a location privacy problem are provided. can do.

(Configuration of mobile communication control system according to the first embodiment of the present invention)
The configuration of the mobile communication control system according to the first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the mobile communication control system according to the present embodiment accesses a mobile terminal (source mobile communication terminal) MT # 1 wirelessly connected to an access node (source access node) AN # 1. The packet is transferred to the mobile terminal (destination mobile communication terminal) MT # 2 wirelessly connected to the mobile node MN via the node (destination access node) AN # 2 and the mobile node MN.

  The mobile communication control system according to the present embodiment includes a network management server NCPF (Network Control Platform), a plurality of access nodes AN # 1 and AN # 2, and a mobile node MN. In the present embodiment, the access node AN and the mobile node MN can be configured by any device including a router device as long as it has the functions described below.

  The network management server NCPF is connected to the plurality of access nodes AN # 1 and AN # 2 and the mobile node MN, and manages the routing addresses RA of all mobile terminals MT in the core network 1.

  In the present embodiment, the routing address RA is an address unique to the core network 1, and includes a first routing address (second address) RA # 1 and a second routing address (third address) RA # 2. including.

  As shown in FIG. 2, the network management server NCPF includes a routing table management unit 11, a location information management unit 12, and a router device control unit 13.

  The routing table management unit 11 includes a home address (first address) HoA, a first routing address (second address) RA # 1, and a second routing for all mobile terminals MT in the core network 1. This is an address management unit that manages a routing table that associates an address (third address) RA # 2. The routing table management unit 11 updates the routing table according to the address assignment information from the mobile node MN and the access node AN.

  The location information management unit 12 manages location information of all mobile terminals MT in the core network 1.

  The router device control unit 13 receives control information such as address assignment information from the access nodes AN # 1 and AN # 2 and the mobile node MN using a predetermined communication protocol.

  For example, the router device control unit 13 sends an address assignment instruction for the mobile terminal (new mobile communication terminal) MT that has transmitted an address assignment request to the mobile node MN via the mobile network 2 as an access node (source access node) AN. The address instruction transmission unit is configured to transmit to # 1 and the access node (destination access node) AN # 2.

  Also, the router device control unit 13 sends an address assignment instruction for all mobile terminals MT wirelessly connected to the mobile node to the access node (source access node) AN # 1 at the time of handover of the mobile node MN. An address allocation instruction transmission unit for transmission is configured.

  As shown in FIG. 3, the access node AN includes an address conversion table management unit 31, a location information management unit 32, a network management server I / F 33, a mobile node I / F 34, a mobile terminal I / F 35, an address A conversion unit 36, a routing unit 37, and an access node I / F 38 are provided.

  The address translation table management unit 31 manages an address translation table used for address translation of the destination mobile terminal MT. Here, the address conversion table management unit 31 updates the address conversion table in response to an address assignment instruction from the network management server NCPF.

  In this embodiment, the address translation table management unit 31 of the access node (source access node) AN # 1 uses a mobile terminal MT # 2 (destination mobile communication terminal) that is wirelessly connected to the mobile node MN by the address translation table. The home address (first address) HoA and the first routing address (second address) RA # 1 are managed in association with each other.

  Further, the address translation table management unit 31 of the access node (destination access node) AN # 2 uses the address translation table to set the first routing address (second address) RA of the mobile terminal (destination mobile communication terminal) MT # 2. An address management unit that manages # 1 and the second routing address (third address) RA # 2 in association with each other is configured.

  Further, the address translation table management unit 31 of the access node AN # 2 is wirelessly connected to the mobile node MN in response to an address assignment request transmitted from the mobile node MN wirelessly connected to the access node AN # 2. An address for assigning a predetermined second routing address RA # 2 to all mobile terminals MT and transmitting address assignment information including the second routing address RA # 2 to the network management server NCPF An allocation information transmission unit is configured.

  Here, the address translation table management unit 31 is configured to assign a predetermined second routing address RA # 2 to all the mobile terminals MT described above in response to an instruction from the network management server NCPF. Also good.

  The location information management unit 32 manages location information of the mobile node MT # 1 located in the cell managed by the access node AN # 1.

  The network management server I / F 33 functions as a communication interface with the network management server NCPF, and receives, for example, an address assignment instruction from the network management server NCPF.

  The mobile node I / F 34 functions as a communication interface with the mobile node MN wirelessly connected to the access node AN, and receives, for example, an address assignment request from the mobile node MN.

  The mobile terminal I / F 35 functions as a communication interface with the mobile terminal MT wirelessly connected to the access node AN, and receives, for example, a location information registration request from the mobile terminal MT.

The mobile terminal I / F 35 is connected to the mobile terminal MT via a wireless communication line.
Send and receive packets to and from.

  The address conversion unit 36 refers to the address conversion table and converts a destination address in a packet received via the mobile node I / F 34, the mobile terminal I / F 35, or the access node I / F 38.

  In the present embodiment, the address conversion unit 36 of the access node AN # 1 is a mobile terminal (destination mobile communication terminal) set as a destination address in a packet transmitted from the mobile terminal (source mobile communication terminal) MT # 1. A mobile terminal (destination mobile communication terminal) MT associated with the home address (first address) HoA of MT # 2 is associated with the home address (first address) HoA of mobile terminal (destination mobile communication terminal) MT # 2. The first routing address (second address) of # 2 is converted to RA # 1.

  Further, the address translation unit 36 of the access node AN # 2 receives the first routing address (first address) of the mobile terminal (destination mobile communication terminal) MT # 2 set as the destination address in the packet received via the core network 12. 2) RA # 1 is assigned to the mobile terminal (destination mobile communication terminal) MT # 1 associated with the first routing address (second address) RA # 1 of the mobile terminal (destination mobile communication terminal) MT # 2. 2 to the second routing address (third address) RA # 2.

  The routing unit 37 performs routing processing on the packet based on the destination address that has been subjected to address conversion. The routing unit 37 of the access node AN # 1 routes the packet to the access node AN # 2 to which the mobile node MN is wirelessly connected based on the destination address whose address has been converted. Further, the routing unit 37 of the access node AN # 2 routes the packet to the mobile node MN based on the destination address converted based on the address converted destination address.

  The access node I / F 38 functions as a communication interface with another access node AN in the core network. For example, the access node I / F 38 transmits / receives a packet to / from another access node AN.

  As shown in FIG. 4, the mobile node MN includes an address conversion table management unit 41, a location information management unit 42, a network management server I / F 43, a mobile terminal I / F 45, an address conversion unit 46, and a routing unit. 47 and an access node I / F 48.

  Since the function of each part of the mobile node MN is basically the same as the function of each part of the access node, only the differences will be described below.

  In the present embodiment, the address conversion table management unit 41 includes the home address (first address) HoA and the second routing address (third) of the mobile terminal (destination mobile communication terminal) MT # 2 located in the mobile network 2. Address) RA # 2 is associated and managed.

  The address conversion table management unit 41 allocates a predetermined second routing address RA # 2 to the new mobile terminal MT in response to the address allocation request for the new mobile terminal MT received by the location information management unit 42. The address allocation information transmitting unit configured to transmit the address allocation information including the second routing address RA # 2 to the network management server NCPF via the network management server I / F 43 is configured.

  Here, the address conversion table management unit 41 may be configured to assign a predetermined second routing address RA # 2 to the new mobile terminal MT described above in response to an instruction from the network management server NCPF. Good.

  Further, the address translation table management unit 41 moves via the access node I / F 48 when it detects a change of the access node AN to be wirelessly connected via the access node I / F 48, that is, when it detects a handover. For the destination access node AN, the second routing address RA # 2 for all mobile terminals MT wirelessly connected to the mobile node MN, that is, all mobile terminals MT managed in the address translation table Send an allocation request.

  The location information management unit 42 is a new mobile terminal MT newly entered in the mobile network 2, that is, a home address (first address) HoA and a second routing address (third address) RA # according to the address translation table. 2 receives an address assignment request from a new mobile terminal (new mobile communication terminal) MT that is not managed. Specifically, the location information management unit 42 acquires the above address assignment request by transmitting broadcast information that can be reached in the mobile network 2.

  The address translation unit 46 uses the second routing address (third address) RA # 2 of the mobile terminal (destination mobile communication terminal) MT # 2 set as the destination address in the packet received from the access node AN # 2. The home address (first address) of the mobile terminal (destination mobile communication terminal) MT # 2 associated with the second routing address (third address) RA # 2 of the mobile terminal (destination mobile communication terminal) MT # 2 Address) Convert to HoA.

  The routing unit 47 configures a packet transfer unit that transfers a packet to the mobile terminal (destination mobile communication terminal) MT # 2 via the mobile terminal I / F 45 based on the destination address that has been address-converted.

As shown in FIG. 5, the mobile terminal MT includes a communication I / F 51, a location information management unit 52, and a communication unit 53.

The communication I / F 51 transmits / receives a packet to / from the access node AN or the mobile node MN in which the mobile terminal MT is located via a wireless communication line. The location information management unit 52 performs location information registration processing for the mobile terminal MT. The communication unit 53 generates a packet in response to a user operation (operation of the mobile communication control system according to the present embodiment).
The operation of the mobile communication control system according to the present embodiment will be described with reference to FIGS.

  First, a packet transfer operation in the mobile communication control system according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 6, in step 601, the mobile terminal (source mobile communication terminal) MT # 1 uses the home address (first address) HoA “of the mobile terminal (destination mobile communication terminal) MT # 2 as the destination address. The packet a in which “2.2” is set is transmitted to the access node (source access node) AN # 1 via the wireless communication line. Here, the home address HoA of the mobile terminal MT # 2 is a fixed address and does not include the location information of the mobile terminal MT # 2.

  In step 602, the access node AN # 1 refers to the address translation table, and uses the home address HoA “2.2” of the mobile terminal MT # 2 as the first routing address (second Address) is converted to RA # 1 “b.3”.

  In Step 603, the access node AN # 1 transmits the packet b including the first routing address RA # 1 “b.3” of the mobile terminal MT # 2 in the destination address via the core network 1 to the access node AN # 1. Route to # 2.

  In step 604, the access node AN # 2 refers to the address translation table and assigns the first routing address RA # 1 “b.3” of the mobile terminal MT # 2 to the second routing of the mobile terminal MT # 2. The address (third address) RA # 2 “d.3” is converted.

  In step 605, the access node AN # 2 routes the packet c including the second routing address RA # 2 “d.3” of the mobile terminal MT # 2 in the destination address to the mobile node MN.

  In Step 606, the mobile node MN refers to the address translation table, sets the second routing address RA # 2 “d.3” of the mobile terminal MT # 2 and the home address HoA “2. 2 ”.

  In step 607, the mobile node MN transfers the packet d including the home address HoA “2.2” of the mobile terminal MT # 2 in the destination address to the mobile terminal MT # 2 via the mobile network 2.

  Secondly, an address assignment operation in the mobile communication control system according to the present embodiment will be described with reference to FIG.

  In step 701, the mobile node MN transmits broadcast information that can reach the mobile network 2. In Step 702, the mobile terminal MT # 2 detects that it has entered the mobile network 2 managed by the mobile node MN that is not currently wirelessly connected, based on the received notification information.

  In step 703, the mobile terminal MT # 2 transmits an address assignment request to the mobile node MN identified by the broadcast information described above. In step 704, the mobile node MN allocates a predetermined second routing address RA # 2 to the mobile terminal MT # 2 in response to the received address allocation request.

  The mobile node MN transmits address assignment information including the home address HoA of the mobile terminal MT # 2 and the second routing address RA # 2 to the access node AN # 2 (step 705a) and also to the network management server NCPF. (Step 705b).

  In step 706, the access node AN # 2 assigns a predetermined first routing address RA # 1 to the mobile terminal MT # 2 according to the received address assignment information, and in step 708, the mobile terminal MT # 2 Address allocation information including the second first routing address RA # 1 and the second routing address RA # 2 is transmitted to the network management server NCPF.

  The network management server NCPF receives the address assignment information from the mobile node MN in step 707, and receives the address assignment information from the access node AN # 2 in step 709. Then, the network management server NCPF registers the home address HoA, the first routing address RA # 1, and the second routing address RA # 2 of the mobile terminal MT # 2 included in the address assignment information in the routing table. . That is, the network management server NCPF updates the routing table according to the received address assignment information.

  In step 710, the network management server NCPF transmits an address assignment instruction for instructing the mobile node MN and the access nodes AN # 1 and AN # 2 to update the address conversion table.

  In step 711, the mobile node MN transmits an address assignment response indicating that the address assignment for the mobile terminal MT # 2 is completed to the mobile terminal MT # 2.

  Third, another address assignment operation in the mobile communication control system according to the present embodiment will be described with reference to FIG.

  In step 801, the mobile node MN has entered an area managed by an access node (second access node) AN # 3 different from the access node (first access node) AN # 2 that is currently wirelessly connected. Is detected.

  In Step 802, the mobile node MN transmits to the access node AN # 3 address assignment requests for all mobile terminals MT wirelessly connected to the mobile node MN. Here, the address assignment request preferably includes the first routing address RA # 1 of all the mobile terminals MT.

  In step 803, the access node AN # 3 assigns a predetermined first routing address RA # 1 to all mobile terminals MT wirelessly connected to the mobile node MN in response to the received address assignment request. .

  In step 804, the access node AN # 3 transmits address assignment information including the first routing address RA # 1 and the second routing address RA # 2 of all the mobile terminals MT to the network management server NCPF.

  In step 805, the network management server NCPF updates the routing table based on the first routing address RA # 1 and the second routing address RA # 2 of the mobile terminal MT included in the received address assignment information.

  In step 806, the network management server NCPF transmits an address assignment instruction to the access node AN # 3. The access node AN # 3 updates the address conversion table in accordance with the received address assignment instruction.

  In step 807, the access node AN # 3 transmits an address assignment response indicating that the address assignment to all the mobile terminals MT is completed to the mobile node MN. In step 808, the access node AN # 3 sends an address assignment response to the mobile node MN. Is sent to the network management server NCPF.

  In Step 809, the network management server NCPF transmits an address deletion instruction that instructs the access node AN # 2 to delete the address related to the mobile node MN from the address conversion table.

  In step 810, the access node AN # 2 updates the address conversion table in response to the received address erasure instruction. In step 811, the access node AN # 2 transmits an address erasure response notifying the completion of the update to the network management server NCPF. To do.

  In step 812, the network management server NCPF transmits an address assignment instruction including the home address HoA of the mobile node MN and the first routing information RA # 1 to the access node AN # 1.

  In step 813, the access node AN # 1 updates the address conversion table in accordance with the received address assignment instruction, and in step 814, sends an address update response notifying that the update is completed to the network management server NCPF. To do.

(Operation and effect of the mobile communication control system according to the present embodiment)
According to the mobile communication control system according to the present embodiment, when the packet is transferred from the mobile terminal MT # 1 to the mobile terminal MT # 2, the address translation unit 36 of the access node AN # 1 is set in the packet. The home address HoA of the terminal MT # 2 is converted into the first routing address RA # 1, and the address conversion unit 36 of the access node AN # 2 performs the first routing of the mobile terminal MT # 2 set in the packet. The address RA # 1 is converted into the second routing address RA # 2, and the address conversion unit 46 of the mobile node MN homes the second routing address RA # 2 of the mobile terminal MT # 2 set in the packet. Solves the problem that the header size of the packet increases because it is converted to the address HoA Rukoto can.

  Further, according to the mobile communication control system according to the present embodiment, the packet is transmitted via the access node AN # 1, the access node AN # 2, and the mobile node MN without going through the home agent HA of the mobile node MN. Since it is transferred from the terminal MT # 1 to the mobile terminal MT # 2, the problem that route optimization cannot be realized can be solved.

  In addition, according to the mobile communication control system according to the present embodiment, the mobile terminal MT # 1 only needs to set the home address HoA of the mobile terminal MT # 2 as the destination address, thus solving the problem of location privacy. be able to.

(Mobile communication control system according to the second embodiment of the present invention)
A mobile communication control system according to the second embodiment of the present invention will be described with reference to FIGS. Hereinafter, differences from the mobile communication control system according to the first embodiment will be mainly described.

  As shown in FIG. 9, the mobile communication control system according to the present embodiment is different from the configuration of the mobile communication control system according to the first embodiment described above in that an anchor node ANN is provided.

  As shown in FIG. 10, the anchor node ANN includes an address conversion table management unit 61, a network management server I / F 63, an address conversion unit 66, a routing unit 67, and an access node I / F 68. . Basically, the function of each part of the anchor node ANN is the same as the function of each part of the access node AN described above, and therefore only the differences will be described.

  The address translation table management unit 61 includes a first routing address (second address) RA # 1 and a second routing address (third address) RA # 2 of the mobile terminal (destination mobile communication terminal) MT # 2. An address management unit configured to associate and manage the encapsulation information specifying the mobile node MN is configured.

  Specifically, the address translation table management unit 61 manages an address management table that associates the first routing address RA # 1 and the second routing address RA # 2 of the mobile terminal MT # 2.

  The address translation table management unit 61 also manages an encapsulation table that associates the encapsulation information that identifies the mobile node MN with the address area of the second routing address RA # 2 of the mobile terminal MT # 2.

  The address translation unit 66 uses the first routing address (second address) of the mobile terminal (destination mobile communication terminal) MT # 2 set as the destination address in the packet transmitted from the access node (source access node) AN # 1. The mobile terminal (destination mobile communication terminal) MT # 2 associated with the first routing address (second address) RA # 1 of the mobile terminal (destination mobile communication terminal) MT # 2. To the second routing address (third address) RA # 2.

  Further, the address translation unit 66 refers to the encapsulation table for the packet whose destination address has been translated, and encapsulates information associated with the address area of the second routing address of the mobile terminal MT # 2 ( For example, encapsulation is performed with the second routing address RA # 2) of the mobile node MN.

  Here, the encapsulation process can be realized by the IPv6 Routing Header Option technology and various Tunneling technologies.

  The routing unit 67 routes the packet to the access node (destination access node) AN # 2 to which the mobile node MN is connected based on the encapsulation information that identifies the mobile node MN.

  The mobile communication control system according to the present embodiment is different from the mobile communication control system according to the first embodiment described above in the configuration of the address conversion table management unit 31 and the address conversion unit 36 of the access node AN # 2. ing.

  The address translation table management unit 31 of the access node AN # 2 encapsulates the mobile node MN connected to the access node (destination access node) AN # 2, for example, the second routing of the mobile node MN. An address management unit that manages an address conversion table that associates the address RA # 2) with the home address HoA of the mobile node MN is configured.

  Also, the address conversion unit 36 includes the second routing address (third address) RA # 2 of the mobile terminal (destination communication terminal) MT # 2 in the packet received via the core network 1. Judge whether or not.

  When the determination result is affirmative, it is determined that the packet is a packet addressed to the mobile terminal MT # 2. In this case, the packet decapsulated by the address translation unit 36 is routed by the routing unit 37 to the mobile node MN specified by the encapsulation information encapsulated in the packet.

  On the other hand, when the determination result is negative, it is determined that the packet is a packet addressed to the mobile node specified by the encapsulation information encapsulated in the packet. In such a case, the address conversion unit 36 converts the encapsulated encapsulation information into the home address HoA of the mobile node MN, and the address-converted packet is routed to the mobile node MN by the routing unit 37. .

  The mobile communication control system according to the present embodiment is different from the mobile communication control system according to the first embodiment described above in the configuration of the routing table of the network management server NCPF.

  Specifically, as shown in FIG. 11, the routing table of the network management server NCPF includes the home addresses HoA of the mobile terminal MT and the mobile node MN in the core network 1, and the first routing of the mobile terminal MT and the mobile node MN. Address RA # 1 and second routing address RA # 2 of mobile terminal MT are associated and managed.

  Next, the operation of the mobile communication control system according to the present embodiment will be described with reference to FIGS.

  First, a packet transfer operation in the mobile communication control system according to the present embodiment will be described with reference to FIG. The operations in steps 1101 and 1103 are the same as the operations in steps 601 and 602 in FIG. 6 described above.

  As shown in FIG. 12, in step 1103, the access node AN # 1 transmits the packet b including the first routing address RA # 1 “b.3” of the mobile terminal MT # 2 in the destination address to the core network 1 To the anchor node ANN.

  In step 1104, the anchor node ANN refers to the address translation table, and sets the first routing address RA # 1 “b.3” of the mobile terminal MT # 2 to the second routing address RA of the mobile terminal MT # 2. Convert to # 2 “d.3”. Then, the anchor node ANN refers to the address conversion table and the encapsulation table, and encapsulates the packet with the encapsulation information “c.1”.

  In step 1105, the anchor node ANN is encapsulated with the encapsulation information “c.1”, and the packet including the second routing address RA # 2 “d.3” of the mobile terminal MT # 2 in the destination address. c is routed to the access node AN # 2.

  In step 1106, the access node AN # 2 determines that the second routing address RA # 2 of the mobile terminal MT # 2 is included in the received packet, and decapsulates the packet. In step 1107, the access node AN # 2 routes the packet d including the second routing address RA # 2 “d.3” of the mobile terminal MT # 2 in the destination address to the mobile node MN.

  Hereinafter, steps 1108 and 1109 are the same as the operations of steps 606 and 607 in FIG. 6 described above.

  Second, an address assignment operation in the mobile communication control system according to the present embodiment will be described with reference to FIG. As shown in FIGS. 6 and 13, the address assignment operation in the mobile communication control system according to the present embodiment is the same as that in the first embodiment described above except that the access node AN # 2 is changed to the anchor node ANN. This is the same as the address assignment operation in the mobile communication control system according to the embodiment.

  Third, another address assignment operation in the mobile communication control system according to the present embodiment will be described with reference to FIG. The operations in steps 1301 and 1302 are the same as the operations in steps 801 and 802 in FIG. 8 described above.

  In Step 1403, the access node AN # 3 that is the destination of the mobile node MN allocates the encapsulation information “e.1” in response to the address allocation request received from the mobile node MN.

  In step 1404, the access node AN # 3 transmits the address assignment information including the encapsulation information and the home address HoA “3.3” of the mobile node to the network management server NCPF.

  In step 1405, the network management server NCPF updates the routing table based on the encapsulation information included in the received address assignment information and the home address HoA of the mobile node. Specifically, the network management server NCPF changes “c.1” to “e.1” in the routing table shown in FIG.

  In step 1406, the network management server NCPF transmits an address assignment instruction to the anchor node ANN. In step 1407, the anchor node ANN updates the encapsulation table in accordance with the received address assignment instruction. Specifically, as shown in FIG. 9, the anchor node ANN changes the encapsulation information from “c.1” to “e.1” in the encapsulation table. In step 1408, the anchor node ANN sends an address update response to the network management server NCPF.

  Hereinafter, the operations of Steps 1409 to 1414 are the same as the operations of Steps 806 to 814 in FIG. 8 described above.

  According to the mobile communication control system according to the present embodiment, when the packet is transferred from the mobile terminal MT # 1 to the mobile terminal MT # 2, the address translation unit 36 of the access node AN # 1 is set in the packet. The home address HoA of the terminal MT # 2 is converted into the first routing address RA # 1, and the address conversion unit 66 of the anchor node ANN uses the first routing address RA of the mobile terminal MT # 2 set in the packet. # 1 is converted into the second routing address RA # 2 and encapsulated in the encapsulation table, and the address translation unit 46 of the mobile node MN receives the second address of the mobile terminal MT # 2 set in the packet. In order to convert the routing address RA # 2 to the home address HoA, the access node N # can header size of the packet in the wireless section between a 2 and the destination mobile communication terminal MT # 2 is to solve the problem increases.

  Further, according to the mobile communication control system according to the present embodiment, the packet is transmitted through the access node AN # 1, the anchor node ANN, the access node AN # 2, and the mobile node MN without going through the home agent HA of the mobile node MN. Thus, since the mobile terminal MT # 1 is transferred to the mobile terminal MT # 2, the problem that route optimization cannot be realized can be solved.

  In addition, according to the mobile communication control system according to the present embodiment, the mobile terminal MT # 1 only needs to set the home address HoA of the mobile terminal MT # 2 as the destination address, thus solving the problem of location privacy. be able to.

  According to this invention, the address management unit 31 of the access node AN # 2 has the first routing address RA # 1 and the second routing address RA # 2 of all the mobile terminals MT wirelessly connected to the mobile node MN. Therefore, when the access node AN to which the mobile node MN is wirelessly connected is changed (that is, at the time of handover), the change of the management content of the address translation unit 36 can be minimized, and the handover delay Can be minimized.

(Mobile communication control system according to the third embodiment of the present invention)
With reference to FIG.15 and FIG.16, the mobile communication control system which concerns on the 3rd Embodiment of this invention is demonstrated. Hereinafter, differences from the mobile communication control system according to the first embodiment will be mainly described.

  As shown in FIG. 15, in the mobile communication control system according to the present embodiment, the access node AN # 2 has a predetermined address with respect to the mobile node MN from the address area assigned to the access node AN # 2. An address assignment unit for assigning an address area is provided, and the address management unit 46 of the mobile node MN starts a new mobile terminal MT that does not manage the home address (first address) HoA and the routing address (second address) RA. In response to the transmitted address assignment request, the routing address (second address) RA of the new mobile terminal MT is assigned from a predetermined address area, thereby the home address (first address) HoA of the new mobile terminal MT. And routing address (second address) RA In that it supervises as is different from the mobile communication control system according to a first embodiment described above.

  In addition, the mobile communication control system according to the present embodiment is associated with the first described above in that the address translation is not performed by the access node AN # 2 and the configuration of the routing table of the network management server NCPF. This is different from the configuration of the mobile communication control system according to the embodiment.

  As shown in FIG. 15, the routing table of the network management server NCPF manages the home address (first address) HoA and routing address (second address) RA of the mobile terminal MT in association with each other.

  In FIG. 15, “b.1” to “b.3” in the address translation table of the mobile node MN are routings of the mobile terminal MT selected from the predetermined address area allocated from the access node AN # 2. Address.

  Next, with reference to FIG. 16, another address assignment operation in the mobile communication control system according to the present embodiment will be described.

  In step 1601, the mobile node MN requests the access node AN # 2 that is wirelessly connected to assign a subnetwork address (Prefix) indicating a predetermined address area.

  In step 1602, the access node AN # 2 selects a predetermined address area from the address areas allocated to itself, and in step 1603, the subnetwork address (Prefix) indicating the predetermined address area is selected. Notify the mobile node MN.

  In step 1604, the mobile node MN receives and manages the subnetwork address (Prefix) indicating the predetermined address area described above.

  In step 1611, the mobile terminal MT # 2 newly entering the mobile network 2 managed by the mobile node MN transmits an address assignment request to the mobile node MN.

  In Step 1612, the mobile node MN assigns the routing address RA “b.3” for the mobile terminal MT # 2 from the predetermined address area described above. In Step 1613, the mobile node MN transmits the address assignment information including the routing address RA “b.3” to the network management server NCPF.

  In step 1614, the network management server NCPF updates the routing table according to the received address assignment information. Hereinafter, the operations of steps 1615 and 1616 are the same as the operations of steps 710 and 711 in FIG. 7 described above.

  A packet transfer operation in the mobile communication control system according to the present embodiment will be briefly described.

  As shown in FIG. 16, in Step 1621, the mobile terminal (source mobile communication terminal) MT # 1 uses the home address (first address) HoA “of the mobile terminal (destination mobile communication terminal) MT # 2 as the destination address. The packet a in which “2.2” is set is transmitted to the access node (source access node) AN # 1 via the wireless communication line.

  In Step 1622, the access node AN # 1 refers to the address conversion table, and sets the home address HoA “2.2” of the mobile terminal MT # 2 to the routing address (second address) RA of the mobile terminal MT # 2. Convert to “b.3”.

  In step 1623, the access node AN # 1 routes the packet b including the routing address RA “b.3” of the mobile terminal MT # 2 in the destination address to the mobile node MN via the access node AN # 2. .

  In Step 1624, the mobile node MN refers to the address conversion table and converts the routing address RA “d.3” of the mobile terminal MT # 2 to the home address HoA “2.2” of the mobile terminal MT # 2. .

  In step 1625, the mobile node MN transfers the packet c including the home address HoA “2.2” of the mobile terminal MT # 2 in the destination address to the mobile terminal MT # 2 via the mobile network 2.

  Note that the present invention is not only applied to the mobile communication control system according to the present embodiment, but is also an arbitrary mobile communication control system (for example, including a mobile node wirelessly connectable to a plurality of mobile terminals under the access node) , Mobile IP system, etc.).

(Mobile communication control system according to the fourth embodiment of the present invention)
A mobile communication control system according to a fourth embodiment of the present invention will be described with reference to FIG. The mobile communication control system according to the present embodiment differs from the mobile communication control system according to the first to third embodiments described above in the configuration of the routing table management unit 11 of the network management server NCPF.

  As shown in FIG. 17, the routing table management unit 11 of the network management server NCPF collectively manages the addresses of a plurality of mobile terminals (mobile communication terminals) MN wirelessly connected to the mobile node.

  Normally, the routing table management unit 11 manages variable addresses such as the care-of address CoA and the routing address RA for each mobile terminal MT. For example, as shown in FIG. 17, “variable address # 1” is managed in the storage area for mobile terminal MT # 1, and “variable address # 4” is managed in the storage area for mobile terminal MT # 4.

  However, according to such a configuration, when the access node AN to which the mobile node MN is wirelessly connected is changed, the routing table management unit 11 of the network management server NCPF stores the memory for all the mobile terminals MT under the mobile node MN. There was a problem that the "variable address" had to be changed by accessing the area.

  Therefore, in the present embodiment, as shown in FIG. 17, only the storage area for the mobile terminals MT # 2 and MT # 3 under the mobile node MN # 1 is managed to belong to the mobile node MN # 1, The storage area for the mobile node MN # 1 is configured to manage the variable address # 2 of the mobile terminal MT # 2 and the variable address # 3 of the mobile terminal MT # 3.

  According to such a configuration, even when the mobile node MN changes the access node AN to be wirelessly connected, the routing table management unit 11 of the network management server NCPF accesses the storage area for the mobile node MN to “ Since only the “variable address” needs to be changed, the time required for updating the routing table can be reduced.

  Note that the routing table management unit 11 of the network management server NCPF according to the present invention is not only applied in the mobile communication control system according to the present embodiment, but is mobile that can be wirelessly connected to a plurality of mobile terminals under the access node. The present invention can be applied to an arbitrary mobile communication control system (for example, a mobile IP system) including a node.

1 is an overall configuration diagram of a mobile communication control system according to an embodiment of the present invention. It is a functional block diagram of the network management server of the mobile communication control system which concerns on one Embodiment of this invention. It is a functional block diagram of the access node of the mobile communication control system which concerns on one Embodiment of this invention. It is a functional block diagram of the mobile node of the mobile communication control system which concerns on one Embodiment of this invention. It is a functional block diagram of the mobile terminal of the mobile communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the packet transfer operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the address allocation operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the address allocation operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. 1 is an overall configuration diagram of a mobile communication control system according to an embodiment of the present invention. It is a functional block diagram of the anchor node of the mobile communication control system which concerns on one Embodiment of this invention. It is a figure which shows an example of the routing table managed in the network management server of the mobile communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the packet transfer operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the address allocation operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows the address allocation operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. 1 is an overall configuration diagram of a mobile communication control system according to an embodiment of the present invention. It is a sequence diagram which shows the address allocation operation | movement in the mobile communication control system which concerns on one Embodiment of this invention. It is a figure which shows an example of the routing table management part of the network management server of the mobile communication control system which concerns on one Embodiment of this invention. It is a whole block diagram of the mobile communication control system which concerns on a prior art. It is a sequence diagram which shows the packet transfer operation | movement in the mobile communication control system based on a prior art. It is a sequence diagram which shows the packet transfer operation | movement in the mobile communication control system based on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Core network 2 ... Mobile network AN # 1, AN # 2 ... Access node ANN ... Anchor node MN ... Mobile node 31, 41, 61 ... Address translation table management part 32, 42, 52 ... Location information management part 33, 43 63 ... Network management server I / F
34 ... Mobile node I / F
35, 45 ... Mobile terminal I / F
36, 46, 66... Address conversion unit 37, 47, 67... Routing unit 38, 48, 68 .. access node I / F
MT # 1, MT # 2 ... mobile terminal 51 ... communication I / F
53 ... Communication unit NCPF ... Network management server 11 ... Routing table management unit 12 ... Location information management unit 13 ... Router device control unit

Claims (18)

A mobile communication control system comprising a plurality of access nodes and mobile nodes,
The source access node to which the source mobile communication terminal is wirelessly connected is
An address management unit that associates and manages a first address and a second address of a destination mobile communication terminal that is wirelessly connected to the mobile node;
The destination mobile communication associated with the first address of the destination mobile communication terminal, the first address of the destination mobile communication terminal set as the destination address in the packet transmitted from the source mobile communication terminal An address conversion unit for converting to a second address of the terminal;
A routing unit for routing the packet to a destination access node to which the mobile node is wirelessly connected based on the converted destination address;
The destination access node is
An address management unit for managing the second address and the third address of the destination mobile communication terminal in association with each other;
The second address of the destination mobile communication terminal set as the destination address in the received packet is changed to the third address of the destination mobile communication terminal associated with the second address of the destination mobile communication terminal An address conversion unit for conversion;
A routing unit for routing the packet to the mobile node based on the converted destination address;
The mobile node is
An address management unit that associates and manages the first address and the third address of the destination mobile communication terminal;
The third address of the destination mobile communication terminal set as the destination address in the received packet is changed to the first address of the destination mobile communication terminal associated with the third address of the destination mobile communication terminal An address conversion unit for conversion;
A mobile communication control system comprising: a packet transfer unit that transfers the packet to the destination mobile communication terminal based on the converted destination address. A network management server;
In response to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the third address, the mobile node sends an address for the new mobile communication terminal to the network management server. An address allocation information transmission unit for transmitting the allocation information;
The network management server
An address management unit that manages the first address, the second address, and the third address of the new mobile communication terminal in association with each other according to the received address assignment information;
An address assignment instruction transmission unit for sending an address assignment instruction for the new mobile communication terminal to the source access node and the destination access node;
The address management unit of the source access node manages the first address and the second address of the new mobile communication terminal in association with each other according to the address assignment instruction,
2. The movement according to claim 1, wherein the address management unit of the destination access node manages the second address and the third address of the new mobile communication terminal in association with each other according to the address assignment instruction. Communication control system. A network management server;
The destination access node transmits address allocation information for all mobile communication terminals wirelessly connected to the mobile node to the network management server in response to an address allocation request transmitted from the mobile node. An address allocation information transmission unit;
The network management server
An address management unit for managing the first address, the second address, and the third address of all the mobile communication terminals in association with each other according to the received address assignment information;
An address assignment instruction transmission unit for sending address assignment instructions for all the mobile communication terminals to the source access node;
The address management unit of the source access node manages the first address and the second address of all the mobile communication terminals in association with each other in accordance with the address assignment instruction. Mobile communication control system. A network management server used in the mobile communication control system according to claim 2 ,
An address management unit that manages the first address, the second address, and the third address of the destination mobile communication terminal in association with each other according to the address assignment information received from the mobile node;
Instructing the source access node to which the source mobile communication terminal is wirelessly connected to manage the first address and the second address of the destination mobile communication terminal in association with each other, and to the destination access node A network management server, comprising: an address assignment instruction transmitting unit that transmits an address assignment instruction that instructs to associate and manage the second address and the third address of the destination mobile communication terminal. A network management server used in the mobile communication control system according to claim 3 ,
An address management unit that manages the first address, the second address, and the third address of the destination mobile communication terminal in association with each other according to the address assignment information received from the destination access node;
Address for transmitting an address assignment instruction for instructing the source access node to which the source mobile communication terminal is wirelessly connected to manage the first address and the second address of the destination mobile communication terminal in association with each other A network management server comprising an allocation instruction transmission unit. A mobile node used in the mobile communication control system according to any one of claims 1 to 3 ,
An address management unit that associates and manages the first address and the third address of the destination mobile communication terminal;
The third address of the mobile communication terminal set as the destination address in the packet transmitted from the source access node is changed to the third address of the mobile communication terminal associated with the third address of the mobile communication terminal. An address conversion unit for converting the address into one address;
A packet transfer unit that transfers the packet to the destination mobile communication terminal based on the converted destination address;
In response to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the third address, the first address and the third address of the new mobile communication terminal are sent to the network management server. A mobile node, comprising: an address allocation information transmitting unit that transmits address allocation information including an address.   When it is detected that an area managed by a second access node different from the first access node that is currently wirelessly connected is detected, address assignment requests to all mobile communication terminals wirelessly connected to the mobile node The mobile node according to claim 6, further comprising: an address allocation request transmission unit that transmits a message to the second access node. An access node used in the mobile communication control system according to any one of claims 1 to 3,
An address management unit that associates and manages the second address and the third address of all destination mobile communication terminals that are wirelessly connected to the mobile node;
The second address of the destination mobile communication terminal set as the destination address in the packet received from the source access node to which the source mobile communication terminal is wirelessly connected is the second address of the destination mobile communication terminal. An address conversion unit for converting to a third address of the destination mobile communication terminal associated with
A routing unit for routing the packet to the mobile node based on the converted destination address;
An address assignment notifying unit for sending address assignment information including a second address and a third address of the destination mobile communication terminal to a network management server in response to an address assignment request sent from the mobile node; An access node comprising: A mobile communication control system comprising a plurality of access nodes, anchor nodes, and mobile nodes,
The source access node to which the source mobile communication terminal is wirelessly connected is
An address management unit that associates and manages a first address and a second address of a destination mobile communication terminal that is wirelessly connected to the mobile node;
The destination mobile communication associated with the first address of the destination mobile communication terminal, the first address of the destination mobile communication terminal set as the destination address in the packet transmitted from the source mobile communication terminal An address conversion unit for converting to a second address of the terminal;
A routing unit for routing the packet to the anchor node based on the converted destination address;
The anchor node is
An address management unit that manages the second address and the third address of the destination mobile communication terminal in association with the encapsulation information that identifies the mobile node;
The destination mobile communication terminal associated with the second address of the destination mobile communication terminal set as the second address of the destination mobile communication terminal set as the destination address in the packet transmitted from the source access node An address conversion unit that converts the packet into which the destination address is converted with the encapsulation information associated with the second address of the destination mobile communication terminal; A routing unit for routing the packet to a destination access node to which the mobile node is connected based on the information;
The destination access node is
An address management unit for managing the encapsulation information;
When the received packet is decapsulated and the third address of the destination communication terminal is included in the packet, the mobile node specified by the encapsulation information encapsulated in the packet A routing unit for routing the packet;
The mobile node is
An address management unit that associates and manages the first address and the third address of the destination mobile communication terminal;
The third address of the destination mobile communication terminal set as the destination address in the received packet is changed to the first address of the destination mobile communication terminal associated with the third address of the destination mobile communication terminal An address conversion unit for conversion;
A mobile communication control system comprising: a packet transfer unit that transfers the packet to the destination mobile communication terminal based on the converted destination address. A network management server;
In response to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the third address, the mobile node sends an address for the new mobile communication terminal to the network management server. An address allocation information transmission unit for transmitting the allocation information;
The network management server
An address management unit for managing the first address, the second address, the third address, and the encapsulation information of the new mobile communication terminal in association with each other according to the received address assignment information;
An address assignment instruction transmission unit for sending an address assignment instruction for the new mobile communication terminal to the source access node and the anchor node;
The address management unit of the source access node manages the first address and the second address of the new mobile communication terminal in association with each other according to the address assignment instruction,
The address management unit of the anchor node associates and manages the second address, the third address, and the encapsulation information of the new mobile communication terminal according to the address assignment instruction. 9. The mobile communication control system according to 9. A network management server;
The destination access node includes an address allocation information transmission unit that transmits address allocation information including the encapsulation information to the network management server in response to an address allocation request transmitted from the mobile node.
The network management server
In accordance with the received address allocation information, the first address, the second address, the third address, and the encapsulation information of all mobile communication terminals wirelessly connected to the mobile node are associated and managed. An address manager;
An address assignment instruction transmitting unit for sending address assignment instructions for all the mobile communication terminals to the anchor node;
The address management unit of the anchor node associates and manages the second address, the third address, and the encapsulation information of all the mobile communication terminals according to the address assignment instruction. Item 10. The mobile communication control system according to Item 9. A network management server used in the mobile communication control system according to claim 10 ,
In response to the address assignment information for the new mobile communication terminal received from the mobile node, the first address, the second address, the third address of the new mobile communication terminal, and the encapsulation information for identifying the mobile node; An address management unit for managing
Transmitting an address assignment instruction for instructing a source access node to which the source mobile communication terminal is wirelessly connected to manage the first address and the second address of the new mobile communication terminal, An address assignment instruction transmitting unit for sending an address assignment instruction that instructs the anchor node to associate and manage the second address, the third address, and the encapsulation information of the new mobile communication terminal; A network management server comprising: A network management server used in the mobile communication control system according to claim 11 ,
According to the address assignment information received from the destination access node, the first address, the second address, the third address, and the mobile node of all mobile communication terminals wirelessly connected to the mobile node are specified. An address management unit that manages the association with the encapsulation information;
An address assignment instruction transmitting unit for sending an address assignment instruction for instructing the anchor node to associate and manage the second address, the third address, and the encapsulation information of all the mobile communication terminals; A network management server comprising: An access node used in the mobile communication control system according to any one of claims 9 to 11 ,
An address management unit that manages encapsulation information that identifies the mobile node;
When the address of the destination mobile communication terminal is included in the packet received from the anchor node, the encapsulation is performed for the mobile node specified by the encapsulation information used for encapsulation of the packet. An access node comprising a routing unit for routing the released packet. An anchor node used in the mobile communication control system according to any one of claims 9 to 11 ,
An address management unit that manages the second address and the third address of the destination mobile communication terminal in association with the encapsulation information that identifies the mobile node;
The second address of the destination mobile communication terminal set as the destination address in the packet transmitted from the source access node to which the source mobile communication terminal is wirelessly connected is the second address of the destination mobile communication terminal. Is converted into the third address of the destination mobile communication terminal associated with the packet, and the packet with the converted destination address is encapsulated with the encapsulation information associated with the second address of the destination mobile communication terminal. An address conversion unit to be
An anchor node comprising: a routing unit that routes the encapsulated packet to the destination access node based on the encapsulation information. A mobile communication control system comprising a plurality of access nodes and mobile nodes,
The source access node to which the source mobile communication terminal is wirelessly connected is
An address management unit that associates and manages a first address and a second address of a destination mobile communication terminal that is wirelessly connected to the mobile node;
The destination mobile communication associated with the first address of the destination mobile communication terminal, the first address of the destination mobile communication terminal set as the destination address in the packet transmitted from the source mobile communication terminal An address conversion unit for converting to a second address of the terminal;
A routing unit for routing the packet to the mobile node based on the converted destination address;
The mobile node is
An address management unit that associates and manages the first address and the second address of the destination mobile communication terminal;
The second address of the destination mobile communication terminal set as the destination address in the received packet is changed to the first address of the destination mobile communication terminal associated with the second address of the destination mobile communication terminal An address conversion unit for conversion;
Based on the converted the destination address, comprising a packet transfer unit for transferring the packet to the destination mobile communication terminal,
The destination access node to which the mobile node is wirelessly connected is predetermined with respect to the mobile node from the address area assigned to the destination access node in response to the address assignment request transmitted from the mobile node. An address assignment unit for assigning an address area of
The address management unit of the mobile node responds to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the second address, and the new mobile communication terminal is out of the predetermined address area. A mobile communication control system characterized in that the first address and the second address of the new mobile communication terminal are associated and managed by assigning the second address .   A mobile node used in the mobile communication control system according to claim 16,
  An address management unit that associates and manages the first address and the second address of the destination mobile communication terminal;
  The second address of the mobile communication terminal set as the destination address in the packet transmitted from the source access node to which the source mobile communication terminal is wirelessly connected is set to the second address of the mobile communication terminal. An address conversion unit for converting to the first address of the associated mobile communication terminal;
  A packet transfer unit for transferring the packet to the destination mobile communication terminal based on the converted destination address;
  In response to an address assignment request transmitted from a new mobile communication terminal that does not manage the first address and the second address, the address management unit includes a predetermined address area assigned by the destination access node. A mobile node characterized in that the first address and the second address of the new mobile communication terminal are managed in association with each other by assigning the second address of the new mobile communication terminal.   An access node used in the mobile communication control system according to claim 16,
  An address allocation unit for allocating a predetermined address area to the mobile node from among address areas allocated to the destination access node in response to an address allocation request transmitted from the mobile node; Access node.

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