JP4423304B2 - Communication control system, communication control method, and routing control apparatus and router apparatus suitable for use in these - Google Patents

Description

  The present invention relates to a communication control system, a communication control method, and a routing control device and a router device suitable for use in these.

  In a conventional IP network, a router device exchanges route information with adjacent router devices using a routing protocol such as OSPF (Open Shortest Path First) or RIP (Routing Information Protocol). The routing process for the destination IP address of the received data is performed with reference to the routing table generated based on the information.

  Also, in a conventional IP network, “MPLS (Multi Protocol Label Switching)” is used as a traffic engineering technique for enabling the duplication of a routing route for bypassing traffic in the event of a link or node failure, and the load distribution of traffic. It is known (for example, see Non-Patent Document 1 and Non-Patent Document 2).

  MPLS is a technology for managing a path by using a “label” as a virtual path by inserting a header called “label” in a lower layer of layer 3, and is generally called “layer 2.5 technology”. ing.

MPLS enables traffic engineering including QoS control by associating a “label” with a specific path (route) or with a QoS class.
Eric Gray, Yukio Hamada “Mastering TCP / IP MPLS” "Introduction to MPLS" by Bruce Devy, Jacob Rector, Yuichi Ikejiri

  However, in the conventional router device, the routing route is determined based on the routing table created in the router device based on the destination IP address.

  Therefore, when there is a handover of a mobile terminal or when there is congestion or failure in the IP network, it is necessary to reconstruct the routing table using the routing protocol, and communication is interrupted for a certain period of time. There was a point.

  Further, the conventional router device has a problem that the routing route cannot be dynamically changed during communication for a specific flow.

  Furthermore, the conventional router device has a problem that dynamic routing control to a specific device such as a billing device, a monitor device, or a media conversion device cannot be performed.

  In addition, MPLS can solve some of the above-mentioned problems by using the concept of “label”. In such a case, all router devices provided in the IP network use a special protocol such as MPLS. There was a problem that it was necessary to support.

  Further, MPLS has a problem that it is not suitable for routing control (flow control) in a fine unit such as an IP address unit.

  Therefore, the present invention has been made in view of the above points, and changes are made to existing routing protocols even when there is a handover of a mobile terminal or when there is congestion or failure in an IP network. It is an object of the present invention to provide a communication control system and a communication control method that enable dynamic flow unit routing control at the layer 3 level, and a routing control device and a router device suitable for use in these.

  A first feature of the present invention is a communication control system including a routing control device, a first router device, and a second router device, wherein the routing control device receives a predetermined trigger; An address information provision requesting unit for requesting the first router device to provide address translation information in response to the reception of the predetermined trigger; and An address translation information generation request unit that requests to generate the address translation information acquired from one router device, and the first router device responds to a request from the routing control device, and the address An address translation information providing unit for providing translation information, and the second router device responds to a request from the routing control device. An address conversion information management unit that generates and manages, an address conversion unit that converts destination address information of received data based on the address conversion information, and a routing processing unit that performs routing processing on the address-converted data It is a summary to comprise.

  In the first aspect of the present invention, it is preferable that the routing control device includes an address translation information change request unit that requests the second router device to change the address translation information.

  In the first aspect of the present invention, it is preferable that the routing control device includes an address translation information deletion request unit that requests the second router device to delete the address translation information. .

  Further, in the first feature of the present invention, the second router device includes an address translation information deletion permission requesting unit that requests the routing control device to delete the address translation information. It is preferable that the address translation information management unit of the second router apparatus deletes the address translation information when the deletion permission is received from the routing control apparatus.

  Further, in the first feature of the present invention, the address conversion information associates destination address information of received data with the IP address of the first router device, and the address conversion of the second router device. The unit encapsulates the destination address information of the received data with the IP address of the first router device, and the routing processing unit performs a routing process on the data using the IP address of the first router device. It is preferable.

  A second feature of the present invention is a communication control system including a routing control device and a router device, wherein the routing control device receives a predetermined trigger and responds to reception of the predetermined trigger. An address information providing / generating unit that generates address conversion information; and an address conversion information generation requesting unit that requests the second router device to generate the address conversion information. An address conversion information management unit that generates and manages the address conversion information in response to a request from the routing control device, and address conversion that converts destination address information of the received data based on the address conversion information And a routing processing unit that performs a routing process on the address-converted data To.

  A third feature of the present invention is a communication control method performed by a routing control device, a first router device, and a second router device, wherein the routing control device receives a predetermined trigger A1; In the routing control device, in response to the reception of the predetermined trigger, the step B1 of requesting the first router device to provide address translation information, and in the first router device, Step C1 of providing the address translation information in response to a request from the routing control device, and the address translation information acquired from the first router device to the second router device in the routing control device. A request from the routing control device in the second router device. In response, the step E1 of generating and managing the address conversion information, the step F1 of converting the destination address information of the received data based on the address conversion information in the second router device, and the second This router device has a process G1 for performing a routing process on the address-converted data.

  A fourth feature of the present invention is a communication control method performed by a routing control device and a router device, wherein the routing control device receives a predetermined trigger A2 and the routing control device uses the predetermined control method. In response to receiving the trigger, the step B2 of generating address translation information, the step C2 of requesting the second router device to generate the address translation information in the routing control device, In the router device, in response to a request from the routing control device, the process D2 for generating and managing the address translation information, and in the router device, the destination address information of the received data is based on the address translation information. Step E2 for converting, and the address-converted data in the router device For in the gist that a step F2 of performing routing processing.

  According to a fifth aspect of the present invention, there is provided a trigger receiving unit that receives a predetermined trigger, and an address that requests the first router device to provide address conversion information in response to the reception of the predetermined trigger. A routing control device comprising: an information provision requesting unit; and an address translation information generation requesting unit that requests the second router device to generate the address translation information acquired from the first router device. This is the gist.

  According to a sixth aspect of the present invention, there is provided a trigger receiving unit that receives a predetermined trigger, an address information provision generating unit that generates address conversion information in response to the reception of the predetermined trigger, and the second router device. On the other hand, the gist of the present invention is a routing control device including an address translation information generation requesting unit that requests to generate the address translation information.

  The seventh feature of the present invention is that, when the routing control device requests to generate address translation information, an address translation information management unit that creates and manages the address translation information, and a destination address of the received data The gist of the present invention is a router apparatus comprising an address conversion unit that converts information based on the address conversion information and a routing processing unit that performs a routing process on the address-converted data.

  As described above, according to the present invention, in a mobile network that performs IP routing, a dynamic change of a routing path accompanying handover of a mobile terminal, determination of an anchor point for micro mobility support, Dynamic routing control such as load distribution routing of traffic at the time of congestion and dynamic routing to a specific device (for example, a billing device, a monitor device, a media conversion device, etc.), such as existing OSPF and RIP It is possible to control in units of flows (units of IP addresses) without having to modify the routing protocol of the above and without using a special layer 2.5 technology such as MPLS.

(Configuration of communication control system according to one embodiment of the present invention)
A configuration of a communication control system according to an embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, the communication control system according to the present embodiment includes a routing control device 30 and a plurality of router devices 10A to 10H. Here, the router device 10F is a first router device including a specific device such as a billing device, a monitor device, or a media conversion device. The other router devices 10A to 10E, 10G, and 10H are second router devices having the functions of a conventional router device.

  As shown in FIG. 2, the router device 10 includes a common primitive processing unit 11, an IP address conversion cache storage unit 12, an address conversion processing unit 13, a routing processing unit 14, and a network I / F unit 15. It has.

  The common primitive processing unit 11 exchanges common primitives with the routing control device 30 using control packets.

  Specifically, as shown in FIG. 4, the common primitive processing unit 11 performs an IP address assignment notification B and an IP address conversion cache deletion permission request via a common primitive (common interface) for the routing control device 30. Send F.

  Here, when the common primitive processing unit 11 notifies (provides) the IP address translation cache (address translation information) 12a related to the assigned IP address in response to the IP address assignment request A from the routing control device 30. , IP address assignment notification B is transmitted.

  Further, when the common primitive processing unit 11 requests the routing control device 30 to permit the deletion of the IP address translation cache (address translation information) 12a related to the IP address set in the IP address translation cache 12a. Then, an IP address conversion cache deletion permission request F is transmitted.

  Further, the common primitive processing unit 11 refers to the address translation cache storage unit 12 in response to the IP address allocation request A (instruction via the common primitive) from the routing control device 30, and outputs the IP from the surplus bandwidth. Assign an address (address translation information). That is, the common primitive processing unit 11 assigns a routable IP address to the router device 10 for the specific flow.

  Further, the common primitive processing unit 11 creates an address translation cache (address translation information) 12 a related to the assigned IP address in the address translation cache storage unit 12.

  In addition, the common primitive processing unit 11 responds to an IP address conversion cache change request D or an IP address conversion cache deletion request D (instruction via the common primitive) from the routing control device 30. 12, the address translation cache (address translation information) 12a related to the corresponding IP address is changed or deleted.

  The address translation cache storage unit 12 stores an address translation cache 12a (address translation information). Specifically, the address translation cache storage unit 12 stores a paired relationship between an input IP address and an output IP address as the address translation cache 12a.

  When the address translation processing unit 13 receives data (IP packet) in which the “input IP address” stored in the address translation cache storage unit 12 is set as the destination IP address, the destination IP address is input to the “input IP address”. It is converted into an “output IP address” corresponding to “IP address”.

  In FIG. 2, when the address translation processing unit 13 receives data (IP packet) in which “input IP address # X1” is set as the destination IP address, the address translation processing unit 13 refers to the address translation cache 12a and refers to the destination IP address. Is converted to “output IP address # Y1”.

  The routing processing unit 14 refers to the routing table and performs routing processing on the address-converted data based on the output IP address.

  The network I / F unit 15 provides a physical interface with other router devices 10 and the routing control device 30.

  In this embodiment, the common primitive processing unit 11 provides address translation information (IP address assigned for the router device 10F) in response to a request from the routing control device 30 (IP address assignment request A). Construct the provision unit.

  In addition, the common primitive processing unit 11 and the IP address conversion cache conversion unit 12 generate and manage address conversion information (IP address allocation request A) in response to a request from the routing control device 30. Configure.

  Further, the address conversion processing unit 13 constitutes an address conversion unit that converts the destination address information of the received data based on the address conversion information (address conversion cache 12a).

  Further, the routing processing unit 14 constitutes a routing processing unit that performs routing processing on the address-converted data.

  The routing control device 30 performs routing control based on IP address assignment control for a plurality of router devices 10.

  As shown in FIG. 3, the routing control device 30 includes a trigger reception unit 31, a router device group information management unit 32, an IP address conversion cache management unit 33, a router device control unit 34, and a common primitive processing unit 35. It comprises.

  The trigger receiving unit 31 receives a trigger from another control device (for example, another routing control device or service control device) as an opportunity to instruct the router device 10F with a common primitive to the router device 10. Receive (detect).

  Here, specific examples of triggers include handover of the mobile terminal or 2, execution of service control such as billing, traffic monitoring, and media conversion, and deterioration of the quality of a specific flow due to congestion or failure of the IP network. .

  The router device group information management unit 32 manages router device group information for the router device 10 managed by the routing control device 30.

  Here, as the router device group information, the physical connection relationship (topology information) of the plurality of router devices 10 managed by the routing control device 30 and the routing information (which flow is routed through which router). ) Etc. are conceivable.

  The IP address translation cache management unit 33 stores an address translation cache (address translation information) 33a for each router device. Specifically, the address translation cache storage unit 33 stores a paired relationship between the input IP address and the output IP address as the address translation cache 33a.

  When a predetermined trigger is detected by the trigger receiving unit 31, the router device control unit 34 refers to the router device group information management unit 32 to determine the specific flow and the router device 10 on the routing route, and The optimum router device 10F that gives an instruction using the common primitive is determined. The router device control unit 34 also determines what instruction is to be given to the determined router device 10.

  The common primitive processing unit 35 exchanges common primitives with the router device 10 using control packets.

  Specifically, as shown in FIG. 4, the common primitive processing unit 35 receives an IP address assignment request A, an IP address conversion cache generation request C, and the like via a common primitive (common interface) for the router device 10. The IP address conversion cache change request D and the IP address conversion cache deletion request E are transmitted.

  Here, the common primitive processing unit 35 is determined by the router device control unit 34 when a predetermined trigger (for example, handover of a mobile terminal or occurrence of congestion or failure in an IP network) is detected by the trigger receiving unit 31. IP address allocation request A for requesting IP address allocation is transmitted to the router device 10F.

  Further, the common primitive processing unit 35 transmits an IP address translation cache generation request C for requesting the creation of the IP address translation cache 12a to the router device 10A determined by the router device control unit 34.

  Specifically, the common primitive processing unit 35 performs routing (routing route) via the specific router device 10F to the router device 10A that performs routing processing based on the IP address in response to the IP address conversion cache generation request C. A request for assigning an IP address for a specific flow is made.

  The common primitive processing unit 35 is determined by the router device control unit 34 when a predetermined trigger (for example, handover of a mobile terminal or occurrence of congestion or failure in an IP network) is detected by the trigger receiving unit 31. An IP address conversion cache change request D for requesting the change of the IP address conversion cache 12a is transmitted to the router device 10A.

  Further, when the trigger reception unit 31 detects a predetermined trigger (for example, the end of communication by the mobile terminal, the end of congestion in the IP network, or the occurrence of failure recovery), the common primitive processing unit 35 detects the router device control unit 34. The IP address translation cache deletion request E for requesting deletion of the IP address translation cache 12a is transmitted to the router device 10A determined by the above. For example, when the common primitive processing unit 35 detects a handover of a mobile terminal, the common primitive processing unit 35 transmits an IP address translation cache deletion request E to the router device to which the mobile terminal was connected before the handover.

  Further, the common primitive processing unit 11 stores the address translation cache 33a related to the corresponding IP address (address translation information) in the address translation cache storage unit 33 in response to the IP address assignment notification B from the router device 10F. Change or delete.

  When the common primitive processing unit 11 receives an IP address translation cache deletion permission request from the router device 10, the common primitive processing unit 11 determines whether or not the IP address translation cache 12a in the router device 10 can be deleted. The result is returned to the router device 10.

  In the present embodiment, the common primitive processing unit 35 configures an address information provision requesting unit that requests the first router device 10F to provide address translation information in response to reception of a predetermined trigger.

  Further, the common primitive processing unit 35 configures an address translation information generation request unit that requests the second router device 10A to generate the address translation information acquired from the first router device 10F.

  The common primitive processing unit 35 constitutes an address translation information change request unit that requests the second router device 10A to change the address translation information.

  In addition, the common primitive processing unit 35 constitutes an address translation information deletion request unit that requests the second router device 10A to delete the address translation information.

(Operation of the communication control system according to the present embodiment)
With reference to FIG.1 and FIG.5, the operation | movement of the exchange between the routing control apparatus 30 and the router apparatus 10 is demonstrated in the communication control system which concerns on this embodiment.

  First, as shown in FIG. 1, the routing route of data from the mobile terminal 1 to the mobile terminal 2 is the first routing route through the router device 10A, the router device 10B, the router device 10C, and the router device 10D. An example in which the second routing path (dotted line) passing through the router device 10A, the router device 10G, the router device 10F, the router device 10E, and the router device 10D is switched from (solid line) will be described.

  As shown in FIG. 5A, in step 100, the trigger receiver 31 of the routing control device 30 causes some congestion or failure on the first routing route, or passes through a special device such as the router device 10F. A predetermined trigger such as a change instruction to the second routing route to be detected is detected.

  In step 101, the common primitive processing unit 35 of the routing control device 30 transmits an IP address assignment request A for requesting IP address assignment to the router device 10 </ b> F determined by the router device control unit 34.

  In step 102, the common primitive processing unit 11 of the router device 10F refers to the address translation cache storage unit 12 in response to the IP address assignment request A from the routing control device 30, and extracts an IP address ( An IP address capable of identifying an IP packet addressed to the mobile terminal 2 is assigned via the router device 10F, hereinafter, an IP address # Y1 addressed to the router device 60).

  In step 103, the common primitive processing unit 11 of the router device 10F transmits an IP address assignment notification B for notifying the assigned IP address (IP address # Y1 addressed to the router device 10F) to the routing control device 30.

  In step 104, the common primitive processing unit 35 of the routing control device 30 applies the router device 10A and the router device 10F determined by the router device control unit 34 in response to the reception of the IP address assignment notification B to the router device 10F. An IP address translation cache generation request C for requesting creation of the IP address translation cache 12a related to the IP address # Y1 addressed to 10F is transmitted.

  Here, the common primitive processing unit 35 of the routing control device 30 generates and stores the IP address conversion cache 33a related to the IP address # Y1 addressed to the router device 10F in the IP address conversion cache 33.

  In step 105, the common primitive processing unit 11 of the router device 10A and the router device 10F receives the IP address translation cache storage unit 12 in response to the reception of the IP address translation cache generation request C, and sends the IP address addressed to the router device 10F. The IP address conversion cache 12a associated with the address # Y1 is generated and stored.

  Specifically, the common primitive processing unit 11 of the router apparatus 10A generates an IP address conversion cache 12a for converting the IP address # X1 of the mobile terminal 2 into the IP address # Y1 addressed to the router apparatus 10F (FIG. 1).

  On the other hand, as shown in FIG. 1, the common primitive processing unit 11 of the router apparatus 10F has an IP address conversion cache 12a for converting the IP address # Y1 addressed to the router apparatus 10F into the IP address # X1 of the mobile terminal 2. Generate (see FIG. 1).

  When the address translation processing unit 13 of the router apparatus 10A receives an IP packet whose destination IP address is addressed to the mobile terminal 2, the IP address translation cache storage unit 12 is referred to and the IP packet The destination address (IP address # X1 of mobile terminal 2) is converted into an output IP packet (IP address # Y1 addressed to router device 10F).

  Next, the routing processing unit 14 of the router device 10A performs routing processing based on the output IP address, and transmits the IP packet to the adjacent router device 10G via the network I / F unit 15.

  Thereafter, when the address translation processing unit 13 of the router device 10F receives an IP packet including the IP address # Y1 addressed to the router device 10F, the IP address translation cache storage unit 12 is referred to and the destination address of the IP packet is referred to. (IP address # Y1 addressed to router device 10F) is converted into an output IP packet (IP address # X1 of mobile terminal 2), and routing processing is performed on the IP packet.

  Further, the common primitive processing unit 11 of the router device 10F may create the above-described address translation cache 12a in the address translation cache storage unit 12 in step 102. In such a case, in step 104, the common primitive processing unit 35 of the routing control device 30 transmits the IP address translation cache generation request C only to the router device 10A.

  Here, the IP address assigned by the router device 10F is routable to the router device 10F and can identify an IP packet for each mobile terminal. For example, in FIG. 1, an IP address # Y1 is an IP address that is routed to the router device 10F and that can identify the mobile terminal 2. The IP address # Y2 is an IP address that is routed to the router device 10F and can identify the mobile terminal 3 (not shown).

  Specifically, when the router device 10F receives an IP packet including the IP address # Y1 as a destination address, the router device 10F converts the destination address to # X1 (IP address of the mobile terminal 2) and routes the IP packet as the destination address. When an IP packet including address # Y2 is received, the destination address is converted to # X2 (IP address of mobile terminal 3) and routed.

  Secondly, an operation in which the routing control device 30 changes the address conversion cache of the router device 10A will be described.

  As shown in FIG. 5B, in step 110, the trigger receiving unit 31 of the routing control device 30 causes some congestion or failure on the first routing route (solid line), or a special device such as the router device 10F. A predetermined trigger such as a change instruction to the second routing route (dotted line) passing through the apparatus is detected.

  In step 111, the common primitive processing unit 35 of the routing control device 30 requests the router device 10A determined by the router device control unit 34 to change the IP address conversion cache 12a. Send D.

  In step 112, the common primitive processing unit 11 of the router device 10A changes the IP address conversion cache 12a related to “IP address addressed to the router device 10F” designated by the IP address conversion cache change request D.

  Third, an operation in which the routing control device 30 deletes the address translation cache of the router device 10A will be described.

  As shown in FIG. 5C, in step 120, the trigger receiving unit 31 of the routing control device 30 causes the congestion termination or failure recovery on the first routing path (solid line), or the second routing path (dotted line). ) To a second routing route (solid line) is detected.

  In step 121, the common primitive processing unit 35 of the routing control device 30 requests the router device 10A determined by the router device control unit 34 to delete the IP address translation cache 12a addressed to the router device 10F. A conversion cache deletion request E is transmitted.

  In step 122, the common primitive processing unit 11 of the router apparatus 10A deletes the IP address conversion cache 12a related to the “IP address addressed to the router apparatus 10F” designated by the IP address conversion cache change request D.

  Fourthly, an operation of deleting the address translation cache of the router device 10A under the initiative of the router device 10A will be described.

  In step 131, when the common primitive processing unit 11 of the router device 10A detects a predetermined trigger such as the elapse of a predetermined time, the router device 10F set in the IP address translation cache 12a is set to the routing control device 30. An IP address translation cache deletion permission request F for requesting permission to delete the IP address translation cache 12a related to the destination IP address is transmitted.

  In step 132, the common primitive processing unit 35 of the routing control device 30 transmits a permission response permitting deletion of the IP address translation cache 12a related to the IP address addressed to the router device 10F to the router device 10A.

However, the IP address conversion cache 12a related to “IP address addressed to the router device 10F” is deleted.

(Operation and effect of the communication control system according to the present embodiment)
According to the communication control system according to the present embodiment, the common primitive processing unit 11 of the router device 10F notifies the assigned IP address to the routing control device 30, and the routing control device 30 performs address conversion on the router device 10A. By generating the cache 12a, it is possible to change the data routing route, to cope with the handover of the mobile terminal 2, to control the routing to a specific device, and to distribute the traffic load (avoid congestion of the old routing route). Etc. becomes possible.

(Modification 1)
The present invention is not limited to the above-described embodiment. Instead of the address translation processing unit 13 of the router apparatus 10A translating the destination IP address set in the IP packet, the tunneling process by IP encapsulation is performed. It may be configured to apply.

  Specifically, the address translation processing unit 13 of the router device 10A encapsulates the received IP packet with the “IP address of the router device 10A” and the destination address “the router device 10F. Encapsulate with "IP address". Thereafter, the address translation unit 13 of the router device 10F performs decapsulation on the received IP packet and transfers the IP packet to the adjacent router device 10E.

(Modification 2)
The present invention is not limited to the above-described embodiment. Instead of the routing control device 30 causing the router device 10F to generate the IP address translation cache 33a related to the router device 10F, the routing control device 30 is used. The device itself may be configured to generate the IP address translation cache 33a related to the router device 10F.

  With reference to FIG. 6, the operation of the communication control system according to this modification will be described.

  In the present modification example, the common primitive processing unit 35 of the routing control device 30 secures a predetermined IP address band to be allocated for changing the routing route in advance.

  As shown in FIG. 6, in step 140, a predetermined trigger is detected by the trigger receiver 31 of the routing control device 30.

  In step 141, the common primitive processing unit 35 of the routing control device 30 assigns an IP address addressed to the router device 10F from a predetermined IP address band secured in advance.

  In step 142, the common primitive processing unit 35 of the routing control device 30 sends an IP address conversion cache related to the IP address addressed to the router device 10F to the router devices 10A and 10F determined by the router device control unit 34. An IP address conversion cache generation request C for requesting the creation of 12a is transmitted.

  In step 143, in response to the reception of the IP address translation cache generation request C, the common primitive processing unit 11 of the router apparatus 10A and the router apparatus 10F sends the IP address translation cache storage unit 12 to the IP address addressed to the router apparatus 10F. An IP address conversion cache 12a associated with the address is generated and stored.

  Specifically, the common primitive processing unit 11 of the router device 10A generates the IP address conversion cache 12a for converting the IP address # X1 of the mobile terminal 2 into the IP address # Y1 addressed to the router device 10F.

  On the other hand, the common primitive processing unit 11 of the router device 10F generates an IP address conversion cache 12a for converting the IP address # Y1 addressed to the router device 10F into the IP address # X1 of the mobile terminal 2.

  According to the communication control system according to this modification, it is possible to reduce the control time required for changing the routing route.

  For example, if the IP address assignment request A is transmitted to the router device 10F, it takes time for the control in the router device 10F, and therefore it is assumed that a delay occurs in the handover control of the mobile terminal. According to the communication control system according to the above, occurrence of such a delay can be avoided.

1 is an overall configuration diagram of a communication control system according to an embodiment of the present invention. It is a functional block diagram of a router apparatus suitable for use in a communication control system according to an embodiment of the present invention. It is a functional block diagram of a routing control apparatus suitable for use in a communication control system according to an embodiment of the present invention. It is a figure for demonstrating the common primitive between the router apparatus and routing apparatus which comprise the communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows operation | movement of the communication control system which concerns on one Embodiment of this invention. It is a sequence diagram which shows operation | movement of the communication control system which concerns on the example of a change of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 2 ... Mobile terminal 10 ... Router apparatus 11, 35 ... Common primitive processing part 12 ... IP address conversion cache storage part 12a, 33a ... IP address conversion cache 13 ... Address conversion processing part 14 ... Routing processing part 15 ... Network I / F unit 30 ... routing device 31 ... trigger receiving unit 32 ... router device group information management unit 33 ... IP address conversion cache management unit 34 ... router device control unit

Claims (19)

A routing control device that controls to switch the routing path between routers from the first routing path to the second routing path ;
A first router device located on the second routing path,
And a second router device located at a branch point between said second routing path between the first routing path,
The routing control device
In the case where a trigger indicating the occurrence of congestion or failure on the first routing path is received, or when the first router device has a service control function including a charging function, a monitoring function or a media conversion function, the first A trigger receiving unit for receiving a trigger indicating that it is necessary to pass through one router device ;
An address information provision requesting unit for requesting the first router device to provide address translation information in response to reception of the trigger;
Based on the address translation information acquired from the first router device, the second address information is generated so as to generate first address translation information for translating data addressed to a destination terminal to the first router device . Address translation information which requests the first router apparatus to generate second address translation information for translating data addressed to the first router apparatus to the destination terminal. A generation request unit,
The first router device is:
In response to a request from the routing control device, an address translation information providing unit that provides the address translation information ;
A first address translation information management unit that generates and manages the second address translation information in response to a request from the routing control device;
A first address conversion unit that converts destination address information of received data based on the second address conversion information;
A first routing processing unit for performing routing processing on the data whose address has been translated by the first address translation unit ;
The second router device is
A second address translation information management unit that generates and manages the first address translation information in response to a request from the routing control device;
A second address conversion unit for converting destination address information of the received data based on the first address conversion information;
A communication control system comprising: a second routing processing unit that performs a routing process on the data whose address has been converted by the second address conversion unit . 2. The routing control device according to claim 1, further comprising an address translation information change request unit that requests the second router device to change the first address translation information. Communication control system. The said routing control apparatus is provided with the address translation information deletion request | requirement part which requests | requires said 2nd router apparatus to delete said 1st address translation information. Communication control system. The second router device includes an address translation information deletion permission request unit that requests the routing control device to permit deletion of the first address translation information,
The communication control system according to claim 1, wherein the second address translation information management unit deletes the first address translation information when the deletion permission is received from the routing control device. The first address conversion information associates destination address information of received data with an IP address of the first router device,
The second address conversion unit encapsulates the destination address information of the received data with the IP address of the first router device,
The communication control system according to claim 1, wherein the routing processing unit performs a routing process on the data using an IP address of the first router device. A routing control device that controls to switch the routing path between routers from the first routing path to the second routing path ;
A first router device located on the second routing path,
And a second router device located at a branch point between said second routing path between the first routing path,
The routing control device
In the case where a trigger indicating the occurrence of congestion or failure on the first routing path is received, or when the first router device has a service control function including a charging function, a monitoring function or a media conversion function, the first A trigger receiving unit for receiving a trigger indicating that it is necessary to pass through one router device ;
An address information provision generating unit that generates address conversion information in response to reception of the trigger;
Based on the generated address translation information , the second router apparatus is requested to generate first address translation information for translating data destined for the destination terminal to the first router apparatus. An address translation information generation requesting unit that requests the first router apparatus to generate second address translation information for translating data addressed to the first router apparatus to the destination terminal. And
The first router device is:
A first address translation information management unit that generates and manages the second address translation information in response to a request from the routing control device;
A first address conversion unit that converts destination address information of received data based on the second address conversion information;
A first routing processing unit that performs a routing process on the data whose address has been converted by the first address conversion unit ;
The second router device is
A second address translation information management unit that generates and manages the first address translation information in response to a request from the routing control device;
A second address conversion unit for converting destination address information of the received data based on the first address conversion information;
A communication control system, comprising: a second routing processing unit that performs a routing process on the data whose address has been converted by the second address conversion unit . In a routing control apparatus that controls to switch a routing path between routers from a first routing path to a second routing path, receiving a trigger indicating occurrence of congestion or a failure on the first routing path, or Trigger indicating that the first router device on the second routing path needs to be routed through the first router device when it has a service control function including a charging function, a monitor function, or a media conversion function Receiving
In the routing control device, in response to the reception of the trigger, requesting the first router device to provide address translation information;
Providing the address translation information in response to a request from the routing control device in the first router device;
In the routing control device, based on the address conversion information acquired from the first router device, first address conversion information for converting data addressed to a destination terminal to the first router device is generated. Requesting the second router device located at a branch point between the first routing path and the second routing path,
In the routing control device, requesting the first router device to generate second address translation information for translating data addressed to the first router device to the destination terminal ;
Generating and managing the first address translation information in response to a request from the routing control device in the second router device;
In the second router device, converting destination address information of received data based on the first address conversion information;
A communication control method comprising: performing a routing process on the address-converted data in the second router device. 8. The communication control method according to claim 7, further comprising a step of requesting the second router device to change the first address translation information in the routing control device. 8. The communication control method according to claim 7, further comprising a step of requesting the second router device to delete the first address translation information in the routing control device. In the second router device, requesting the routing control device to permit deletion of the first address translation information;
The communication control method according to claim 7, further comprising a step of deleting the first address translation information when the deletion permission is received from the routing control device in the second router device. The first address conversion information associates destination address information of received data with an IP address of the first router device,
In the converting step, the second router device encapsulates the destination address information of the received data with the IP address of the first router device,
8. The communication control method according to claim 7, wherein in the step of performing the routing process, the data is routed using an IP address of the first router device. In a routing control apparatus that controls to switch a routing path between routers from a first routing path to a second routing path, receiving a trigger indicating occurrence of congestion or a failure on the first routing path, or Trigger indicating that the first router device on the second routing path needs to be routed through the first router device when it has a service control function including a charging function, a monitor function, or a media conversion function Receiving
In the routing control device, in response to receiving the trigger, generating address translation information;
Based on the generated address translation information , the second router apparatus is requested to generate first address translation information for translating data destined for the destination terminal to the first router apparatus. Process,
Generating and managing the first address translation information in response to a request from the routing control device in the second router device;
In the second router device, converting destination address information of received data based on the first address conversion information;
A communication control method comprising: performing a routing process on the address-converted data in the second router device. A routing control device that controls to switch a routing path between routers from a first routing path to a second routing path,
Service control in which a trigger indicating occurrence of congestion or failure on the first routing path is received, or the first router device on the second routing path includes a charging function, a monitoring function, or a media conversion function A trigger receiving unit that receives a trigger indicating that it is necessary to pass through the first router device in the case of having a function ;
In response to receipt of the trigger, to the first router device, the address information providing request section that requests to provide address conversion information,
Based on the address translation information acquired from the first router device, the second router device located at the branch point between the first routing route and the second routing route is addressed to the destination terminal. A routing control device comprising: an address translation information generation requesting unit that requests to generate first address translation information for translating the data of the first address to the first router device. 14. The routing control device according to claim 13, further comprising an address translation information change request unit that requests the second router device to change the first address translation information. 14. The routing control device according to claim 13, further comprising an address translation information deletion request unit that requests the second router device to delete the first address translation information. A routing control device that controls to switch a routing path between routers from a first routing path to a second routing path,
A trigger indicating the occurrence of congestion or failure on the first routing path is received, or the first router device located on the second routing path includes a charging function, a monitoring function, or a media conversion function A trigger receiving unit that receives a trigger indicating that it is necessary to pass through the first router device in the case of having a service control function ;
An address information provision generating unit that generates address conversion information in response to reception of the trigger;
Based on the generated address translation information , data addressed to a destination terminal is transmitted to the second router device located at the branch point between the first routing path and the second routing path . A routing control device comprising: an address translation information generation requesting unit that requests to generate first address translation information for translation to a router device. A congestion control or failure has occurred on the first routing path from the routing control device that controls to switch the routing path between routers from the first routing path to the second routing path , or the second When the first router device located on the routing route has a service control function including a charging function, a monitor function, or a media conversion function, it is necessary to pass through the first router device. An address conversion information management unit that generates and manages the first address conversion information when requested to generate the first address conversion information for converting the data addressed to the first router device When,
An address conversion unit that converts destination address information of received data based on the first address conversion information;
A router apparatus comprising: a routing processing unit that performs a routing process on the address-converted data. An address translation information deletion permission requesting unit that requests the routing control device to permit deletion of the first address translation information;
The router apparatus according to claim 17, wherein the address translation information management unit deletes the first address translation information when the deletion permission is received from the routing control apparatus. The first address translation information associates destination address information of received data with a predetermined IP address,
The address conversion unit encapsulates the destination address information of the received data with the predetermined IP address,
The router device according to claim 17, wherein the routing processing unit performs a routing process on the data using the predetermined IP address.

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