JP4395507B2 - Mobile communication system, mobile communication method, server device, transfer device, and mobile communication terminal - Google Patents

Description

  The present invention relates to a mobile communication system, a mobile communication method, a server device, a transfer device, and a mobile communication terminal.

Conventionally, a mobile communication system using a global 6 routing method is known (see, for example, Non-Patent Document 1). Conventionally, a mobile communication system using HMIP (Hierarchical Mobile IP) is known (see, for example, Non-Patent Document 2).
The Internet Society, “Global connectivity for IPv6 Mobile Adhoc Networks”, http: // www. ietf. org / internet-drafts / draft-wakikawa-manet-globalv6-02. txt The Internet Society, “Hierarchical Mobile IP”, http: // www. nal. motorlabs. com / nemo / draft / draft-ietf-mobileip-hmipv6-06. txt

  However, in the mobile communication system using the conventional global 6 routing method, when the mobile network is handed off, it is necessary to notify the home agents of all mobile communication terminals in the mobile network that the mobile network has moved. Further, in the mobile communication system, in order to realize route optimization at the time of handoff of the mobile network, it is necessary to notify the terminal that is the communication partner that the mobile device has moved.

  As a result, the mobile communication system has a problem in that when the mobile network is handed off, the amount of signals to be transmitted increases and the handoff processing time becomes long.

  Specifically, as shown in FIG. 18, in the mobile communication system, when the mobile network A moves, that is, when the access node AN to which the mobile network A is connected is changed, The address information of the mobile terminals (mobile communication terminals) MT # 1 and MT # 2 is changed.

  In the example of FIG. 18, the connection destination node of the mobile network A is changed from AN1 to AN2, and the address information (CoA address) of the mobile terminal MT # 1 is changed from “AN1prefix + # 1” to “AN2prefix + # 1”. The address information (CoA address) of the mobile terminal MT # 2 has been changed from “AN1prefix + # 2” to “AN2prefix + # 4”.

  At this time, in the mobile communication system, the changed mobile terminal address information is notified to the home agents HA1 and HA2 of each mobile terminal and the mobile terminals MT # 3 and MT # 4 which are communication partners, so that the optimum information is obtained. Communication can be continued without breaking the communication path.

  However, in the mobile communication system, since it is necessary to notify all home agents and communication partners about the movement of the mobile network A, a large amount of signal is required until the update of the address information of the mobile communication terminal is completed. Processing time is required, and it is difficult to support real-time communication.

  Further, in the mobile communication system, the address information (CoA address) of the mobile terminals MT # 1 and # 2 is controlled by DAD (Duplication Address Detection) so that the mobile terminals MT # 1 and # 2 do not have the same address information. When the mobile network moves, the portion (for example, # 2) below “AN1prefix” of the newly set CoA address may be changed, and the time required for updating the address information of the mobile communication terminal There was a problem of increasing.

  Moreover, in the mobile communication system using the conventional HMIP, instead of notifying all home agents and communication partners about the movement of the mobile network, it is only necessary to notify the MAP (Mobility Anchor Point). It is superior to the mobile communication system using the method.

  However, even in the mobile communication system, when the mobile network moves, it is necessary to update the address information of all mobile communication terminals in the mobile network, so that the handoff processing time cannot be significantly reduced. There was a point.

  Specifically, as shown in FIG. 19, in the mobile communication system, when the mobile network A moves, that is, when the access node AN connected to the mobile node MN that manages the mobile network A is changed, The address information of all mobile terminals (mobile communication terminals) MT # 1 and MT # 2 in the mobile network A is changed.

  However, in the mobile communication system, information (CoA_MN) related to the next hop destination when the MAP installed in the core network 1 transmits to all the mobile terminals MT # 1 and MT # 2 in the mobile network A. Since it holds, but does not hold the correlation between the information, when the mobile network A moves, the update for each of all the mobile terminals MT # 1 and MT # 2 in the mobile network A There is a problem that it is necessary to transmit information to the MAP, and the handoff processing time becomes long.

  Accordingly, the present invention has been made in view of the above points, and a mobile communication system, a mobile communication method, a server device, a transfer device, and a mobile device that can reduce a large amount of signal and processing time during handoff. An object is to provide a communication terminal.

  A first feature of the present invention is a mobile communication system that transfers a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal. Thus, the address information of the mobile communication terminal is not related to the common information associated with the predetermined node to which the mobile network is connected and the predetermined node to which the mobile network is connected. Even if it is a case where the predetermined node to change is comprised, it makes it a summary to be comprised with the individual information which does not change.

  According to this invention, even when the mobile network moves, only the common information associated with the predetermined node to which the mobile network is connected needs to be changed for the address information of the mobile communication terminal in the mobile network. Therefore, the processing time at the time of handoff can be reduced.

  In the above invention, an address management device that manages the mobile network and address information of mobile communication terminals in the mobile network in association with each other, and the address management device changes a predetermined node to which the mobile network is connected. In this case, it is preferable to change only the common information constituting the address information of the mobile communication terminal in the mobile network.

  In the above-mentioned invention, the predetermined node to which the mobile network is connected is changed based on a notification from the predetermined mobile communication terminal in the mobile network or a mobile node that manages the mobile network. It is preferable to detect this.

  According to this invention, since only a predetermined mobile communication terminal in the mobile network or a mobile node that manages the mobile network notifies the address management device about the movement of the mobile network, the signal amount at the time of handoff can be reduced. Can do.

  A second feature of the present invention is a mobile communication method for transferring a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal. Thus, the address information of the mobile communication terminal is not related to the common information associated with the predetermined node to which the mobile network is connected and the predetermined node to which the mobile network is connected. Even if a predetermined node to be changed is included, it is configured with individual information that does not change, and a predetermined mobile communication terminal in the mobile network is changed to a predetermined node to which the mobile network is connected. The predetermined mobile communication terminal is connected to the mobile network. Changing the address information of the mobile communication terminal by changing only the common information constituting the address information of all the mobile communication terminals, and the predetermined mobile communication terminal is address information of the mobile communication terminal. And a step of notifying all of the mobile communication terminals in the mobile network and notifying an address management device that manages address information of the mobile communication terminals in the mobile network. .

  A third feature of the present invention is a mobile communication method for forwarding a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal. Thus, the address information of the mobile communication terminal is not related to the common information associated with the predetermined node to which the mobile network is connected and the predetermined node to which the mobile network is connected. Even if the predetermined node to be changed is constituted by individual information that does not change, the predetermined node is associated with the predetermined node with respect to the mobile node that manages the mobile network. And the common information notified by the mobile node. And changing the address information of the mobile communication terminal by changing only the common information constituting the address information of all mobile communication terminals in the mobile network, and the mobile node includes the mobile communication terminal. And a step of notifying the address management device that manages the address information of the mobile communication terminal in the mobile network.

  According to a fourth aspect of the present invention, there is provided a mobile communication system that transfers a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal. A server device that manages address information of all mobile communication terminals in the mobile network, wherein the mobile communication terminal address information includes common information associated with a predetermined node to which the mobile network is connected, and The mobile network is not associated with a predetermined node to which the mobile network is connected, and is configured by individual information that does not change even when the predetermined node to which the mobile network is connected is changed. A mobile communication terminal, the common information, and the individual information And summarized in that it includes an address information management unit for management.

  In the above-described invention, it is preferable that the address information management unit changes only the common information based on a notification from a predetermined mobile communication terminal in the mobile network or a mobile node that manages the mobile network.

  A fifth feature of the present invention is a mobile communication system for transferring a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal. A transfer device provided on a transfer path of the packet, wherein the address information of the mobile communication terminal is connected to common information associated with a predetermined node to which the mobile network is connected and the mobile network is connected A mobile communication terminal in the mobile network, the mobile communication terminal in the mobile network; An address information management unit that manages the common information and the individual information in association with each other. And it is required to.

  In the above invention, the address information management unit changes only the common information based on a notification from a predetermined mobile communication terminal in the mobile network or a mobile node that manages the mobile network. It is preferable to change the address information of the communication terminal.

  In the above-described invention, the address information management unit manages the first common information and the second common information in association with each other as the common information, and the address information of the mobile communication terminal in the received packet It is preferable to include an address conversion unit that converts the first common information constituting the information into the second common information and transfers it.

  A sixth feature of the present invention is a mobile communication system for transferring a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal. A mobile communication terminal provided in the mobile network, wherein the address information of the mobile communication terminal includes common information associated with a predetermined node to which the mobile network is connected and a predetermined information to which the mobile network is connected. The mobile communication terminal in the mobile network, and the individual information that is not changed even when the predetermined node connected to the mobile network is changed, Address information management unit for managing common information and the individual information in association with each other And summarized in that it comprises a.

  In the above invention, when the address information management unit detects that a predetermined node to which the mobile network is connected has changed, the address information of the mobile communication terminal is changed by changing only the common information. It is preferable to notify the address management apparatus that changes and associates and manages the mobile network and the address information of the mobile communication terminal in the mobile network.

  As described above, according to the present invention, there are provided a mobile communication system, a mobile communication method, a server device, a transfer device, and a mobile communication terminal that can reduce a large amount of signal and processing time during handoff. be able to.

(Configuration of mobile communication system according to the first embodiment of the present invention)
The configuration of the mobile communication 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 system according to the present embodiment includes a plurality of access nodes AN1 to AN5, a mobility management router 30, and mobility management servers 50, 50a, and 50b in the core network 1. ing. Further, in the example of FIG. 1, the mobile network A configured by a plurality of mobile terminals MT # 1 and MT # 2 has moved from a state connected to the access node AN1 to a state connected to the access node AN2. .

  In addition, as shown in FIG. 1, the mobile communication system according to the present embodiment includes a mobile terminal (mobile communication terminal) in the mobile network A connected to a predetermined node (access node AN1 or AN2) in the core network 1. ) A packet is forwarded to MT # 1 and MT # 2 based on the address information of the mobile terminal (mobile communication terminal).

  Here, the address information of the mobile terminal includes common information associated with a predetermined node (access node AN1 or AN2) to which the mobile network A is connected and a predetermined node (access node AN1 or AN2) and individual information that does not change even when a predetermined node (access node AN1 or AN2) to which the mobile network A is connected is changed.

  Specifically, the address information of the mobile terminal MT # 1 is “AN1 prefix (common information) + # 1 (individual information)” when the mobile network A is connected to the access node AN1. When A is connected to the access node AN2, it is “AN2 prefix (common information) + # 1 (individual information)”.

  Similarly, the address information of the mobile terminal MT # 2 is “AN1prefix (common information) + # 2 (individual information)” when the mobile network A is connected to the access node AN1, and the mobile network A When connected to the access node AN2, it is “AN2 prefix (common information) + # 2 (individual information)”.

  As described above, the common information (AN1 prefix or AN2 prefix) is changed depending on whether the mobile network A is connected to the access node AN1 or the access node AN2.

  As shown in FIG. 1, a packet transmitted from the mobile terminal MT # 3 or MT # 4 is transferred to the mobile terminal MT # 1 or MT # 2 in the mobile network A via the mobility management router 30. .

  Here, the mobility management router 30 is provided on a packet transfer path configured so as not to have a redundant configuration like a packet transfer path via a home agent whose location is fixed.

  When the mobile terminal MT # 1 in the mobile network A detects the movement of the mobile network A, the mobile management router 30 and the mobile management server 50 represent all the mobile terminals MT in the mobile network A on behalf of On the other hand, the update information related to the address information of all the mobile terminals MT in the mobile network A is notified.

  Here, the configuration of the mobile terminal MT # 1 in the mobile network A will be described with reference to FIG. As shown in FIG. 2, the mobile terminal MT # 1 includes an information receiving unit 11, an individual information managing unit 12, a location information generating unit 13, an information transmitting unit 14, and a mobile network location information managing unit 15. It has.

  The information receiving unit 11 receives broadcast information (Advertisement) transmitted from the access node AN1 or AN2, and update information (Binding Update) transmitted from another mobile terminal MT # 2.

  The individual information management unit 12 manages individual information of the mobile terminal MT # 1. In the example illustrated in FIG. 2, the individual information management unit 12 manages the individual information “# 1” of the mobile terminal MT # 1. Such individual information is not changed even if the connection destination access node of the mobile network A is changed.

  When the location information generation unit 13 starts to be in the mobile network A, the location information generation unit 13 includes the common information included in the broadcast information received from the access node AN1 or AN2, and the individual information managed by the individual information management unit 12. Based on the above, location information (address information) of the mobile terminal MT # 1 is generated.

  The information transmission unit 14 transmits the location information generated by the location information generation unit 13 to the mobility management router 30 and the mobility management servers 50, 50a, and 50b (in addition, mobile terminals other than the mobile terminal MT # 1) The information transmission unit 14 of the MT transmits the location information generated by the location information generation unit 13 to a predetermined mobile terminal MT # 1 in the mobile network A, the mobility management router 30, and the mobility management servers 50, 50a, and 50b. ).

  The information transmission unit 14 transmits broadcast information (Advertisement) indicating that the location information (address information) of the mobile terminal MT has been changed to all the mobile terminals MT in the mobile network A. For example, the notification information includes the changed common information.

  In addition, the information transmission unit 14 transmits update information (Binding Update) indicating that the location information (address information) of the mobile terminal MT has been changed to the mobility management router 30 and the mobility management servers 50, 50a, and 50b. For example, the update information includes common information after the change.

  The in-mobile network location information management unit 15 manages location information (address information) of all mobile terminals MT in the mobile network A. Specifically, the location information management unit 15 in the mobile network constitutes an address information management unit that manages the mobile terminal MT in the mobile network A, common information, and individual information in association with each other.

  When the mobile network location information management unit 15 detects that the access node AN (predetermined node) to which the mobile network A is connected has changed, the mobile network MT location information management unit 15 changes the common information only to change the location information ( Address information).

  The configuration of the mobility management router 30 will be described with reference to FIG. As shown in FIG. 3, the mobility management router 30 includes an information receiving unit 31, a location information management unit 32, a notification unit 33, and a routing processing unit 34. The mobility management router 30 is a transfer device provided on a transfer path for packets addressed to mobile terminals in the mobile network A.

  The information receiving unit 31 receives various information such as location information transmitted from the mobile terminal MT that has started to be in the mobile network A and update information (Binding Update) transmitted from the mobile terminal MT # 1. It is.

  The location information management unit 32 manages location information of all mobile terminals MT in the mobile network A. In the example of FIG. 3, the location information management unit 32 includes location information of the mobile terminal MT # 1 including “common information = AN1prefix” and “individual information = # 1”, and “common information = AN1prefix” and “ The location information of the mobile terminal MT # 2 configured with “individual information = # 2” is managed.

  The location information management unit 32 changes the location information of the mobile terminal MT by changing the common information constituting the location information of the managed mobile terminal MT based on the update information from the mobile terminal MT # 1 To do.

  When a certain mobile terminal MT is newly located in the mobile network A, the notifying unit 33 communicates with the mobile terminal MT (for example, the mobile terminal MT # 3 or MT # 4). To that effect.

  The routing processing unit 34 refers to the location information management unit 32 and transfers the packet to the mobile terminal MT in the mobile network A.

  In the example of FIG. 3, the routing processing unit 34 transfers a packet transmitted from the mobile terminal MT # 3 via the access node AN3 to the mobile terminal MT # 1 via the access node AN2. Also, the routing processing unit 34 transfers the packet transmitted from the mobile terminal MT # 4 via the access node AN4 to the mobile terminal MT # 2 via the access node AN2.

  The function of the mobility management router 30 may be configured to be provided in the access nodes AN1 to AN4 and the mobile terminals MT # 3 and MT # 4 that are communication partners.

  The configuration of the mobility management servers 50, 50a, and 50b will be described with reference to FIG. As shown in FIG. 4, the configuration of the mobility management servers 50, 50 a, 50 b is basically the same except for the management content by the location information management unit 51. I will explain.

  As shown in FIG. 4, the mobility management server 50 includes a location information management unit 51, an information reception unit 52, and an information transmission unit 53. The mobility management server 50 is, for example, a MIP home agent.

  The location information management unit 51 manages location information of all mobile terminals MT in the mobile network A. In the example of FIG. 4, the location information management unit 32 includes the location information of the mobile terminal MT # 1 including “common information = AN1prefix” and “individual information = # 1”, “common information = AN1prefix”, and “ The location information of the mobile terminal MT # 2 configured with “individual information = # 2” is managed.

  The location information management unit 51 changes the location information of the mobile terminal MT by changing the common information constituting the location information of the managed mobile terminal MT based on the update information from the mobile terminal MT # 1 To do.

  Note that the location information management units 51a and 51b of the mobility management servers 50a and 50b are set as pointers to the location information management unit 51 of the mobility management server 50 in order to reduce access when the location information is changed.

  Specifically, as shown in FIG. 4, the location information management unit 51a of the mobility management server 50a stores the location information of the mobile terminal MT # 1 in the mobile network A in the location information management unit 51 of the mobility management server 50. (Information regarding pointer setting) is stored, and the location information management unit 51b of the mobility management server 50b stores the location information of the mobile terminal MT # 2 in the location of the mobility management server 50. The fact that it is described in the table for mobile network A in the information management unit 51 (information on pointer setting) is stored. Details of the location information of the mobile terminal MT # 1 are stored in the location information management unit 51 of the mobility management server 50.

  Therefore, when the mobile terminal MT # 1 or MT # 2 is handed off, information is rewritten in the location information management unit 51 of the mobility management server 50, while information is updated in the location information management units 51a and 51b of the mobility management servers 50a and 50b. Is not rewritten.

  The information receiving unit 52 receives various information such as location information transmitted from the mobile terminal MT that has started to be in the mobile network A and update information transmitted from the mobile terminal MT # 1. The information transmission part 53 transmits various information.

(Operation of mobile communication system according to this embodiment)
The operation of the mobile communication system according to the present embodiment will be described with reference to FIGS.

  First, referring to FIG. 5, in the mobile communication system according to the present embodiment, allocation of address information (location information) when mobile terminal MT # 2 is newly located in mobile network A The operation, that is, the registration operation of the mobile terminal MT # 2 will be described.

  As shown in FIG. 5, in step 101, the access node AN1 transmits broadcast information (Advertisement) including common information (AN1prefix) associated with the access node AN1.

  In step 102, the location information generation unit 13 of the mobile terminal MT # 2 that has started to be in the mobile network A uses the common information included in the broadcast information received from the access node AN 1 and its own individual information management unit 12. Using the managed individual information (# 2), its own location information (“AN1prefix” + “# 2”) is generated.

  The information transmission unit 14 of the mobile terminal MT # 2 transmits the update information (Binding Update) including the generated location information to the mobile terminal MT # 1 in Step 103a and transmits it to the mobility management server 30 in Step 103b. .

  In step 104a, the location information management unit 15 in the mobile network of the mobile terminal MT # 1 registers the location information of the mobile terminal MT # 2, and in step 104b, the location information management unit 32 of the mobility management router 30 The location information of mobile terminal MT # 2 is registered.

  Here, based on the common information of the location information of the mobile terminal MT # 2, it can be determined that the mobile terminal MT # 2 is in the mobile network A connected to the access node AN1.

  In step 105, when the notification unit 33 of the mobility management router 30 notifies the mobile terminal MT # 2 in the mobile network A, the mobile terminal MT # 3 and the mobile terminal MT # 3 are configured to transmit a packet to the mobility management router 30. Notify MT # 4.

  Secondly, with reference to FIG. 6, an operation of changing address information (location information) when the mobile network A moves in the mobile communication system according to the present embodiment will be described.

  As shown in FIG. 6, in step 201, the access node AN2 that is the movement destination transmits broadcast information (Advertisement) including common information (AN2prefix) associated with the access node AN2.

  In step 202, the mobile network location information management unit 15 of the mobile terminal MT # 1 uses the common information (AN1 prefix) constituting the location information of the mobile terminal MT in the mobile network A as the broadcast information received from the access node AN2. Change to included common information (AN2prefix).

  In step 203, the information transmitting unit 14 of the mobile terminal MT # 1 transmits broadcast information (Advertisement) including the changed common information (AN2prefix) to all the mobile terminals MT in the mobile network A.

  In step 204, the location information management unit 15 in the mobile network of the mobile terminal MT # 2 uses the common information (AN1prefix) constituting the location information of the mobile terminal MT # 2 as broadcast information received from the mobile terminal MT # 1. Change to included common information (AN2prefix). At this time, the information transmitting unit 14 of the mobile terminal MT # 2 is configured not to transmit update information about the location information to the mobility management router 30 or the like.

  In step 205, the information transmitting unit 14 of the mobile terminal MT # 1 has updated information (Binding Update) for notifying that the mobile network A has moved, that is, the change of the location information of the mobile terminal MT in the mobile network A. Is transmitted to the mobility management router 30 (and the mobility management server 50).

  In step 206, the location information management unit 32 of the mobility management router 30 includes the common information (AN1 prefix) constituting the location information of the mobile terminal MT in the mobile network A in the update information received from the mobile terminal MT # 1. To common information (AN2prefix). As a result, the handoff process of the mobile terminal MT in the mobile network A is completed.

(Operation and effect of the mobile communication system according to the present embodiment)
According to the mobile communication system according to the present embodiment, even when the mobile network A moves, the location information of the mobile terminal MT in the mobile network A is associated with the access node AN to which the mobile network A is connected. Since only the common information needs to be changed, the processing time during handoff can be reduced.

  Further, according to the mobile communication system according to the present embodiment, only the mobile terminal MT # 1 (predetermined mobile communication terminal) in the mobile network A is connected to the mobile management router 30 and the mobile management server 50 in the mobile network A. Since the movement is notified, the signal amount at the time of handoff can be reduced. Specifically, since only one signal indicating that the common information has been changed is notified, the signal amount at the time of handoff can be reduced.

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

  As shown in FIG. 7, the mobile communication system according to the present embodiment includes the mobile node MN that manages the mobile network A, and the configuration of the location information of the mobile terminal MT. This is different from the configuration of the mobile communication system according to the embodiment.

  As shown in FIG. 8, the mobile node MN includes an information receiving unit 71, an individual information managing unit 72, a location information generating unit 73, an information transmitting unit 74, a mobile network location information managing unit 75, and a mobile network. And a control unit 76.

  The mobile network control unit 76 performs an interface function between the mobile terminal MT in the mobile network A and the access node AN in cooperation with the location information management unit 75 in the mobile network.

  The other functions of the mobile node MN are the same as the functions of the mobile terminal MT # 1 shown in FIG.

  In the present embodiment, the common information is address information (location information) of the mobile node MN including information indicating the connection destination access node AN, and the individual information is a mobile that manages the mobile network A that is in the area. It is address information (location information) of the mobile terminal MT including information indicating the node MN.

  Specifically, the address information of the mobile terminal MT # 1 is “AN1prefixMN (common information) + MNprefix # 1 (individual information)” when the mobile network A is connected to the access node AN1, and the mobile network When A is connected to the access node AN2, it is “AN2prefixMN (common information) + MNprefix # 1 (individual information)”.

  Similarly, when the mobile network A is connected to the access node AN1, the address information of the mobile terminal MT # 2 is “AN1prefixMN (common information) + MNprefix # 2 (individual information)”. When connected to the access node AN2, “AN2prefixMN (common information) + MNprefix # 2 (individual information)”.

  Here, with reference to FIG. 9, the operation of changing the address information (location information) when the mobile network A moves in the mobile communication system according to the present embodiment will be described.

  As shown in FIG. 9, in Step 301, the access node AN2 that is the movement destination transmits broadcast information (Advertisement) including common information (AN2prefixMN) associated with the access node AN2.

  In step 302, the location information management unit 75 in the mobile node MN of the mobile node MN includes the common information (AN1prefixMN) constituting the location information of the mobile terminal MT in the mobile network A in the broadcast information received from the access node AN2. Change to common information (AN2prefixMN).

  In step 303, the information transmission unit 14 of the mobile node MN transmits broadcast information (Advertisement) including the changed common information (AN2prefixMN) to all mobile terminals MT in the mobile network A.

  In step 304, the mobile network location information management unit 15 of the mobile terminals MT # 1 and MT # 2 obtains the common information (AN1prefixMN) constituting the location information of the mobile terminal MT # 1 or MT # 2 as the mobile node MN. To the common information (AN2prefixMN) included in the broadcast information received from. At this time, the information transmitters 14 of the mobile terminals MT # 1 and MT # 2 are configured not to transmit update information about the location information to the mobility management router 30 or the like.

  In step 305, the information transmitting unit 14 of the mobile node MN moves update information (Binding Update) for notifying that the mobile network A has moved, that is, the location information of the mobile terminal MT in the mobile network A has changed. The data is transmitted to the management router 30 (and the mobility management server 50).

  In step 306, the location information management unit 32 of the mobility management router 30 includes the common information (AN1prefixMN) constituting the location information of the mobile terminal MT in the mobile network A included in the update information received from the mobile node MN. Change to information (AN2prefixMN). As a result, the handoff process of the mobile terminal MT in the mobile network A is completed.

  According to the mobile communication system according to the present embodiment, even when the mobile network A moves, the location information of the mobile terminal MT in the mobile network A is associated with the access node AN to which the mobile network A is connected. Since only the common information needs to be changed, the processing time during handoff can be reduced.

  Further, according to the mobile communication system according to the present embodiment, only the mobile node MN in the mobile network A notifies the mobile management router 30 and the mobile management server 50 about the movement of the mobile network A. The amount of signal can be reduced. Specifically, since only one signal indicating that the common information has been changed is notified, the signal amount at the time of handoff can be reduced.

(Mobile communication system according to the third embodiment of the present invention)
With reference to FIG.10 and FIG.11, the mobile communication system which concerns on the 3rd Embodiment of this invention is demonstrated. The mobile communication system according to the present embodiment is an application of the mobile communication system according to the second embodiment described above to a conventional HMIP mobile communication system.

  Hereinafter, differences from the mobile communication system according to the second embodiment will be mainly described. As shown in FIG. 10, the mobile communication system according to the present embodiment is different from the configuration of the mobile communication system according to the second embodiment described above in the configuration of the location information of the mobile terminal MT.

  Specifically, the routing information (location information) addressed to the mobile terminal MT # 1 is “CoA_MN (subordinate to AN1)” (first routing information) in the MAP when the mobile network A is connected to the access node AN1. (See FIG. 11A) and “CoA_MT1” (second routing information) in the mobile node MN (see FIG. 11B). Further, the routing information (location information) addressed to the mobile terminal MT # 1 is “CoA_MN (subordinate to AN2)” (first routing information) in the MAP when the mobile network A is connected to the access node AN2. (See FIG. 11 (a)), it is “CoA_MT1” (second routing information) in the mobile node MN (see FIG. 11 (b)).

  Further, the routing information (location information) addressed to the mobile terminal MT # 2 is “CoA_MN (subordinate to AN1)” (first routing information) in the MAP when the mobile network A is connected to the access node AN1. (See FIG. 11 (a)), it is “CoA_MT2” (second routing information) in the mobile node MN (see FIG. 11 (b)). Further, the routing information (location information) addressed to the mobile terminal MT # 2 is “CoA_MN (subordinate to AN2)” (first routing information) in the MAP when the mobile network A is connected to the access node AN2. (See FIG. 11 (a)), it is “CoA_MT2” (second routing information) in the mobile node MN (see FIG. 11 (b)).

  Specifically, as shown in FIG. 11 (a), as the first routing information of the mobile terminal MT, the address information (care-of-address) of the mobile node MN is adopted, and the mobile terminal MT As the second routing information, address information (care-of-address) of the mobile terminal MT is adopted.

  When detecting that the mobile network A has moved, the information transmission unit 74 of the mobile node MN transmits update information (Binding Update) indicating that to the MAP.

  As a result, the location information management unit 32 of the MAP changes the routing information addressed to the mobile terminal MT in the mobile network A.

(Mobile communication system according to the fourth embodiment of the present invention)
A mobile communication system according to the fourth embodiment of the present invention will be described with reference to FIG. The mobile communication system according to the present embodiment shows an example of a common information and individual information allocation method.

  As shown in FIG. 12, the mobile communication system according to this embodiment is configured by a hierarchical structure including node Nodes # 1 to # 3, access nodes AN1 to AN4, and a mobile node MN.

  As shown in FIG. 12, “A :: / 10” is assigned as a sub-network to node Node # 1, and “AA :: / 20” is assigned as a sub-network to node Node # 2. The node Node # 3 is assigned “A.B :: / 20” as a subnetwork, and the access node AN1 is assigned “A.A: A :: / 30” as a subnetwork. Is assigned to the access node AN2 as a sub-network, and “A.A.B :: / 30” is assigned to the access node AN3 as a sub-network. 30 ”is assigned, and“ A.B.B :: / 30 ”is assigned as a sub-network to the access node AN4. Here, the IPv6 notation method is used to display the sub-network.

  Here, the mobile node MN connected to the access node AN1 transmits a part of the subnetwork (AAAA :: / 40) assigned to the access node AN1 from the access node AN1 to the common information. Assigned as.

(Mobile communication system according to the fifth embodiment of the present invention)
A mobile communication system according to a fifth embodiment of the present invention will be described with reference to FIGS. 13 to 17. Hereinafter, differences from the mobile communication system according to the second embodiment will be mainly described. As shown in FIG. 13, the mobile communication system according to the present embodiment includes a network management server NCPF, and address translation is performed in the mobility management router (AGR) 30, the access node AN, and the mobile node MN. Thus, the configuration of the mobile communication system according to the second embodiment is different.

  By using this method, individual information can be closed and used in a mobile network, so that duplication does not occur and it is guaranteed that the mobile network is unchanged even when the mobile network moves.

  The configuration of the network management server NCPF will be described with reference to FIG. As illustrated in FIG. 14, the network management server NCPF includes a location information management unit 81, a routing table management unit 82, an information reception unit 83, and an information transmission unit 84.

  The location information management unit 81 manages location information of all mobile terminals MT in the mobile network A. In the example of FIG. 14, the location information management unit 81 includes location information of the mobile terminal MT # 1 configured by “common information = IPraAN1 (MN)” and “individual information = # MT1”, and “common information = IPraAN1”. (MN) ”and“ individual information = # MT2 ”are managed for location information of the mobile terminal MT # 2.

  The routing table management unit 82 manages a routing table for performing address translation in the core network 1 (that is, the access node AN and the mobility management router 30) and the mobile node MN.

  The information receiving unit 83 receives various information such as update information (Binding Update) from the mobile node MN. The information transmitting unit 84 transmits various information such as update information about the address translation table for the mobile node MN, the mobility management router (AGR) 30 and the access node AN.

  In the example of FIG. 13, the address translation table of the access node AN3 includes the home address HoA (IPha # MT1) of the mobile terminal MT # 1 and the first location information RA # 1 (IPraAGR # MT1) of the mobile terminal MT # 1. Is to convert to

  In addition, the address conversion table of the mobility management router (AGR) 30 includes the first common information (prefix: IPraAGR) constituting the first location information RA # 1 (IPraAGR # MT1) of the mobile terminal MT # 1 as the mobile. This is to convert the second location information RA # 2 (IPraAN1 (MN) # MT1) of the terminal MT # 1 into second common information (prefix: IPraAN1 (MN)).

  Here, the mobility management router (AGR) 30 uniformly converts the first common information “IPraAGR” included in the received packet into the second common information “IPraAN1 (MN)”. Therefore, at the time of handoff of the mobile network A, the mobility management router (AGR) 30 only needs to rewrite the second common information instead of rewriting the location information of each mobile terminal MT in the mobile network A. The processing time during handoff can be greatly reduced.

  Further, the address translation table of the mobile node MN includes the second location information RA # 2 (IPraAN1 (MN) # MT1) of the mobile terminal MT # 1 as the home address HoA (IPha # MT1) of the mobile terminal MT # 1. It is for conversion.

  Hereinafter, the operation of the mobile communication system according to the present embodiment will be described with reference to FIGS. 15 to 17.

  First, the registration operation of the mobile terminal MT # 1 in the mobile communication system according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 15, in step 401, the access node AN1 transmits broadcast information (Advertisement) to the mobile node MN.

  In step 402, the information transmission unit 74 of the mobile node MN transmits an inquiry about common information (prefix) that can be allocated to the mobile terminal MT # 1 in the mobile network A to the access node AN1.

  In step 403, the access node AN1 selects a prefix (common information) that can be assigned to the mobile terminal MT # 1, and in step 404, transmits a response including the selected prefix (common information) to the mobile node MN.

  In step 405, the information transmission unit 74 of the mobile node MN transmits broadcast information (Advertisement) indicating that registration of the mobile terminal MT # 1 is possible to the mobile terminal MT # 1.

  In step 406, the mobile terminal MT # 1 returns a response to the above-described broadcast information to the mobile node MN. In step 407, the location information generation unit 73 of the mobile node MN, based on the above-described prefix (common information), the location information (“common information = IPraAN1 (MN)” + “individual information = #” of the mobile terminal MT # 1. MT1 ") is generated and stored in the mobile network location information management unit 75 (address conversion table).

  In step 408, the information transmission unit 74 of the mobile node MN notifies the network management server NCPF of the generated location information of the mobile terminal MT # 1.

  In step 409, the location information management unit 81 of the network management server NCPF registers the location information of the mobile terminal MT # 1, and the routing table management unit 82 selects the optimum in consideration of the mobility characteristics of the mobile network A. The address translation table (related to the prefix) of the mobility management router (AGR) 30 is updated.

  In step 410, the information transmission unit 84 of the network management server NCPF transmits information for creating an address conversion table related to the prefix to the mobility management router (AGR) 30.

  In step 411, the location information management unit 31 of the mobility management router (AGR) 30 creates an address conversion table related to the prefix according to information from the network management server NCPF. In step 412, the information transmission unit 31 A response indicating that the creation of the address conversion table has been completed is transmitted to the network management server NCPF.

  The network management server NCPF transmits update information (Binding Update) including the location information of the mobile terminal MT # 1 to the mobile node MN in Step 413a, and transmits it to the mobility management router (AGR) 30 in Step 413b.

  In step 414, the location information management unit 84 of the mobile node MN completes the update of the location information of the mobile terminal MT # 1, and responds to that effect to the mobile terminal MT # 1. Thereafter, the mobile terminal MT # 1 can perform communication in the mobile network A.

  Secondly, with reference to FIG. 16, a packet transfer operation in the mobile communication system according to the present embodiment will be described.

  As shown in FIG. 16, in step 501, the mobile terminal MT # 3 transmits a packet including “IPha # MT1 (home address of the mobile terminal MT # 1)” as a destination address to the access node AN3.

  In step 502, the access node AN3 inquires of the network management server NCPF about the first routing information of the mobile terminal MT # 1. In step 503, the information transmission unit 81 of the network management server NCPF transmits update information for updating the address conversion table of the access node AN3 to the access node AN3.

  In step 504, the access node AN3 updates the address translation table based on the received update information, and sets the destination address of the received packet to “IPraAGR # MT1 (first routing address of the mobile terminal MT # 1)”. Convert to In step 505, the access node AN 3 transfers the packet whose address has been converted to the mobility management router (AGR) 30.

  In step 506, the routing processing unit 34 of the mobility management router (AGR) 30 refers to the address conversion table and sets the destination address of the received packet as “IPraAN1 (MN) # MT1 (the second terminal of the mobile terminal MT # 1). In step 507, the address-converted packet is transferred to the access node AN1.

  The access node converts the destination address of the received packet into “IPha # MT1 (home address of mobile terminal MT # 1)” by referring to the address conversion table in step 508 and converts the address in step 509. The transferred packet is transferred to the mobile terminal MT # 1.

  Thirdly, with reference to FIG. 17, an operation for changing the address information (location information) of the mobile terminal MT # 1 in the mobile communication system according to the present embodiment will be described.

  As shown in FIG. 17, in step 601, the mobile terminal MT # 1 and the mobile terminal MT # 3 are communicating.

  In step 602, when the mobile network A moves, the information transmission unit 74 of the mobile node MN transmits a prefix (common information) that can be allocated to the mobile terminal MT in the mobile network A to the access node AN2 that is the movement destination. Inquire.

  In step 603, the access node AN2 selects a prefix (common information) that can be allocated to the mobile terminal MT in the mobile network A. In step 604, the access node AN2 sends the selected prefix (common information) to the mobile node MN. respond.

  In step 605, the location information management unit 75 in the mobile node MN of the mobile node MN changes the common information constituting the location information of all mobile terminals MT in the mobile network A based on the selected prefix (common information). To do.

  In step 606, the information transmitting unit 74 of the mobile node MN transmits a notification that the location information of all mobile terminals MT in the mobile network A has been changed to the network management server NCPF. Here, since only one signal indicating that the common information has been changed is notified, the signal amount at the time of handoff can be reduced.

  In step 607, the location information management unit 81 and the routing table management unit 82 of the network management server NCPF change the common information constituting the location information of all mobile terminals MT in the mobile network A.

  The information transmission unit 84 of the network management server NCPF transmits the update information on the location information of all the mobile terminals MT in the mobile network A to the mobile node MN in step 608a, and the mobility management router (AGR) in step 608b. 30.

  In step 609, the mobility management router (AGR) 30 updates the address conversion table in the location information management unit 32 according to the received update information, and in step 610, the update of the address conversion table is completed. Responds to the network management server NCPF.

  In step 611, the information transmitting unit 84 of the network management server NCPF transmits a deletion instruction for the location information of all mobile terminals MT in the mobile network A to the access node AN1 that is the movement source.

  In step 612, the access node AN1 deletes the corresponding record from the address conversion table in response to the deletion instruction from the network management server NCPF. In step 613, the access node AN1 informs the network management server NCPF that the deletion has been completed. Send a response to indicate.

1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention. It is a functional block diagram of the mobile terminal of the mobile communication system according to the first embodiment of the present invention. It is a functional block diagram of the mobility management router of the mobile communication system according to the first embodiment of the present invention. It is a functional block diagram of the mobility management server of the mobile communication system according to the first embodiment of the present invention. FIG. 5 is a sequence diagram showing a registration operation of a mobile terminal in the mobile communication system according to the first embodiment of the present invention. It is a sequence diagram which shows the change operation | movement of the address information of the mobile terminal in the mobile communication system which concerns on the 1st Embodiment of this invention. It is a whole block diagram of the mobile communication system which concerns on the 2nd Embodiment of this invention. It is a functional block diagram of the mobile node of the mobile communication system which concerns on the 2nd Embodiment of this invention. It is a sequence diagram which shows the change operation | movement of the address information of the mobile terminal in the mobile communication system which concerns on the 2nd Embodiment of this invention. It is a whole block diagram of the mobile communication system which concerns on the 3rd Embodiment of this invention. It is a figure which shows an example of the location information managed in the mobile communication system which concerns on the 3rd Embodiment of this invention. It is a whole block diagram of the mobile communication system which concerns on the 4th Embodiment of this invention. It is a whole block diagram of the mobile communication system which concerns on the 5th Embodiment of this invention. It is a functional block diagram of the network management server of the mobile communication system which concerns on the 5th Embodiment of this invention. It is a sequence diagram which shows the registration operation | movement of the mobile terminal in the mobile communication system which concerns on the 5th Embodiment of this invention. FIG. 10 is a sequence diagram showing packet transfer operation in the mobile communication system according to the second embodiment of the present invention. It is a sequence diagram which shows the change operation | movement of the address information of the mobile terminal in the mobile communication system which concerns on the 5th Embodiment of this invention. It is a whole block diagram of the mobile communication system which concerns on a prior art. It is a whole block diagram of the mobile communication system which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Core network A ... Mobile network AN1, AN2, AN3, AN4, AN5 ... Access node MT # 1, MT # 2, MT # 3, MT # 4 ... Mobile terminal 11, 31, 52, 52a, 52b, 71, 83 ... Information receiving unit 12, 72 ... Individual information managing unit 13, 73 ... Location information generating unit 14, 53, 53a, 53b, 74, 84 ... Information transmitting unit 15, 75 ... Mobile network location information managing unit 30 ... Moving Management router 32, 51, 51a, 51b, 81 ... Location information management unit 33 ... Notification unit 34 ... Routing processing unit 50, 50a, 50b ... Mobility management server MN ... Mobile node 76 ... Mobile network control unit NCPF ... Network management server 85 ... Routing table manager

Claims (8)

A mobile communication system for forwarding a packet to a plurality of mobile communication terminals in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal,
An address management device that associates and manages the mobile network and address information of a plurality of mobile communication terminals in the mobile network;
The address information of the mobile communication terminal includes common information associated with a predetermined node to which the mobile network is connected and predetermined information to which the mobile network is connected without being associated with a predetermined node to which the mobile network is connected. Even if the node is changed, it is configured with individual information that does not change,
The address management device includes:
Receiving a common information and individual information notified from a predetermined mobile communication terminal in the mobile network when a predetermined node to which the mobile network is connected is changed;
Based on the received common information and individual information, the common information constituting the address information of all mobile communication terminals in the mobile network is changed to the common information received by the receiving unit. Communications system.   The address management device detects that a predetermined node to which the mobile network is connected has changed based on a notification from a predetermined mobile communication terminal in the mobile network or a mobile node that manages the mobile network. The mobile communication system according to claim 1. A mobile communication method for forwarding a packet to a plurality of mobile communication terminals in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal,
The address information of the mobile communication terminal includes common information associated with a predetermined node to which the mobile network is connected and predetermined information to which the mobile network is connected without being associated with a predetermined node to which the mobile network is connected. Even if the node is changed, it is configured with individual information that does not change ,
A predetermined mobile communication terminal in the mobile network detecting that a predetermined node to which the mobile network is connected has changed;
The predetermined mobile communication terminal changing address information of the mobile communication terminal by changing only common information constituting address information of all mobile communication terminals in the mobile network; and
The predetermined mobile communication terminal notifies the common information constituting the address information of the mobile communication terminal after the change to all the mobile communication terminals in the mobile network, and the mobile communication terminal after the change Notifying the common information and the individual information constituting the address information to the address management device that manages the address information of the mobile communication terminal in the mobile network;
A mobile communication method comprising: A mobile communication method for forwarding a packet to a plurality of mobile communication terminals in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal,
The address information of the mobile communication terminal includes common information associated with a predetermined node to which the mobile network is connected, and predetermined information to which the mobile network is connected without being associated with a predetermined node to which the mobile network is connected. Even if the node is changed, it is configured with individual information that does not change ,
The predetermined node notifying the mobile node that manages the mobile network of common information associated with the predetermined node;
The mobile node changes the address information of the mobile communication terminal by changing only the common information constituting the address information of all the mobile communication terminals in the mobile network based on the notified common information When,
The mobile node notifying the common information and individual information constituting the changed address information of the mobile communication terminal to an address management device that manages the address information of the mobile communication terminal in the mobile network; A mobile communication method characterized by the above. In a mobile communication system that forwards a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on address information of the mobile communication terminal, all mobile communication in the mobile network A server device for managing terminal address information,
The address information of the mobile communication terminal includes common information associated with a predetermined node to which the mobile network is connected, and predetermined information to which the mobile network is connected without being associated with a predetermined node to which the mobile network is connected. Even if the node is changed, it is configured with individual information that does not change,
An address information management unit that manages the mobile communication terminal in the mobile network, the common information, and the individual information in association with each other ;
The address information management unit includes common information and individual information notified from a predetermined mobile communication terminal in the mobile network or a mobile node managing the mobile network when a predetermined node to which the mobile network is connected is changed. A server device, wherein the address information of the mobile communication terminal is changed by changing only common information constituting address information of all mobile communication terminals in the mobile network based on the information. In a mobile communication system for transferring a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on the address information of the mobile communication terminal, provided on a transfer path of the packet Transfer device comprising:
The address information of the mobile communication terminal is configured by common information associated with a predetermined node to which the mobile network is connected and individual information not associated with a predetermined node to which the mobile network is connected,
An address information management unit that manages the mobile communication terminal in the mobile network, the common information, and the individual information in association with each other ;
The address information management unit includes common information and individual information notified from a predetermined mobile communication terminal in the mobile network or a mobile node managing the mobile network when a predetermined node to which the mobile network is connected is changed. A transfer apparatus characterized in that, based on the information, the address information of the mobile communication terminal is changed by changing only the common information constituting the address information of all mobile communication terminals in the mobile network. The address information management unit manages the first common information and the second common information in association with each other as the common information,
7. The apparatus according to claim 6, further comprising an address conversion unit that converts the first common information constituting the address information of the mobile communication terminal in the received packet into the second common information and transfers the second common information. The transfer device described. A mobile communication system for transferring a packet to a mobile communication terminal in a mobile network connected to a predetermined node in a core network based on the address information of the mobile communication terminal is provided in the mobile network. A mobile communication terminal,
The address information of the mobile communication terminal is configured by common information associated with a predetermined node to which the mobile network is connected and individual information not associated with a predetermined node to which the mobile network is connected,
An address information management unit that manages the mobile communication terminal in the mobile network, the common information, and the individual information in association with each other;
The address information management unit
When it is detected that a predetermined node to which the mobile network is connected has changed, the address information of the mobile communication terminal is changed by changing only the common information,
Notifying the address management device that associates and manages the mobile network and the address information of the mobile communication terminal in the mobile network of the common information and the individual information constituting the changed address information of the mobile communication terminal A mobile communication terminal characterized by the above.

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