WO2016104608A1 - 網間接続制御装置、及び接続制御方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims description 19
- 238000012546 transfer Methods 0.000 claims abstract description 66
- 238000004891 communication Methods 0.000 claims abstract description 45
- 230000006870 function Effects 0.000 description 49
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- 230000000977 initiatory effect Effects 0.000 description 2
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- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0407—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the identity of one or more communicating identities is hidden
- H04L63/0414—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the identity of one or more communicating identities is hidden during transmission, i.e. party's identity is protected against eavesdropping, e.g. by using temporary identifiers, but is known to the other party or parties involved in the communication
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Definitions
- the present invention relates to an interconnection technology between communication networks.
- IMS IP Multimedia Subsystem
- a mobile communication provider constructs an IP-based network (core network) by IMS and provides a mobile communication service to a user via an access network such as LTE / 3G. Yes. Further, communication between users who subscribe to different operators is enabled by IP interconnection (hereinafter referred to as “interconnection”) between networks.
- IP interconnection hereinafter referred to as “interconnection”
- Fig. 1 shows an example of the configuration when interconnections are made between operator networks.
- the operator A network which is the operator A network
- the operator B network which is the operator B network
- the operator C network which is the operator C network
- the carrier D network is interconnected.
- FIG. 1 is a diagram that pays particular attention to the carrier A network, and shows an inter-network connection control device 10 provided at the boundary part of the carrier A network.
- An inter-connection control device may be provided.
- the operator A network is an IMS network
- the operator B network is a non-IMS network
- the carrier B network is an IP Centrex network for the inside of the carrier B.
- FIG. 1 also shows a call control device 20 and a call control device 40 that perform control. These devices perform session control by SIP (Session Initiation Protocol).
- the call control device 20 of the carrier A network which is an IMS network is a device having a function of S-CSCF (Serving-Call Session Control Function) defined by IMS, for example.
- S-CSCF Server-Call Session Control Function
- an address resolution device 30 is provided.
- the address resolution device 30 is, for example, an ENUM server (Non-Patent Document 2), and the call control device 20 of the carrier A network has an ENUM client function for making an address inquiry to the ENUM server.
- Non-Patent Document 1 stipulates that the IMS S-CSCF has an ENUM function.
- call connection in the case where call connection is made from user A (UE-A), which is a subscriber of operator A, to user D (UE-D), which is a subscriber of operator D
- UE-A user A
- UE-D user D
- MNP Mobile Number Portability
- a connection request signal including the user D called number as a destination is transmitted (step 1).
- the connection request signal reaches the call control device 20.
- the call control device 20 inquires of the address resolution device 30 about the address of the user D called number (generic name such as URI and IP address) and acquires the address of the user D called number (step 2).
- the call control device 20 decides to transfer the connection request signal to the carrier D network based on the address received from the address resolution device 30 in step 2, and forwards the connection request signal to the carrier D network. (Step 3).
- the connection request signal reaches the user D (UE-D) correctly.
- a call connection procedure in a case where a call connection is made from a user B (UE-B) who is a subscriber of the operator B (non-IMS network) to a user D (UE-D) which is a subscriber of the operator D An example will be described.
- the call control device 40 in the carrier B network which is a non-IMS network does not have an ENUM function.
- a connection request signal including the user D called number as a destination is transmitted (step 11).
- the connection request signal reaches the call control device 40.
- the call control device 40 determines that the destination of the connection request signal is the carrier C network based on the user D called number, and transfers the connection request signal to the carrier C network (step 12).
- the user D called number is the number of the user who has moved out of the MNP to the operator D, it is determined that the connection request signal is not addressed to the operator C in the operator C network, and an error response is returned (steps 13 and 14).
- the present invention has been made in view of the above points.
- call connection from a communication network having no address resolution function such as an ENUM function to another communication network is properly performed. It is an object to provide a technique that can be performed in the future.
- an inter-network connection control device used in an interconnection network
- a connection request signal transfer unit for receiving a connection request signal addressed to another communication network from a call control device in a certain communication network
- An address inquiry unit that inquires an address resolution device of an address corresponding to a destination telephone number included in the connection request signal received by the connection request signal transfer unit, and obtains the address from the address resolution device
- an inter-network connection control device comprising: a transfer instruction unit that instructs the call control device to transfer the connection request signal to the address acquired by the address inquiry unit.
- connection control method executed by an inter-network connection control device used in an interconnection network, A connection request signal addressed to another communication network is received from a call control device in a certain communication network, an address corresponding to the destination telephone number included in the connection request signal is inquired to the address resolution device, and the address is obtained from the address resolution device. Address inquiry step to perform, There is provided a connection control method comprising: a transfer instruction step for instructing the call control device to transfer the connection request signal to the address acquired in the address inquiry step.
- a connection executed in a communication system including an inter-network connection control device used in an interconnection network and a call control device provided in a certain communication network in the interconnection network.
- a control method The call control device receiving a connection request signal sent from a user device; The call control device, based on a destination telephone number included in the connection request signal, sending the connection request signal to another communication network; Address inquiry step in which the inter-network connection control device receives the connection request signal, inquires an address resolution device about an address corresponding to a destination telephone number included in the connection request signal, and acquires the address from the address resolution device When, A transfer instruction step in which the network connection control device instructs the call control device to transfer the connection request signal to the address acquired in the address inquiry step; And a step of transferring the connection request signal to the address according to the instruction.
- an interconnection network in which a plurality of communication networks are connected, it is possible to appropriately perform call connection from a communication network having no address resolution function such as an ENUM function to another communication network.
- a communication network having no address resolution function such as an ENUM function
- FIG. 1 is an overall configuration diagram of a system in an embodiment of the present invention.
- 3 is a functional configuration diagram of the network connection control device 100.
- FIG. It is a figure which shows the example of the hardware constitutions of the network connection control apparatus.
- 3 is a functional configuration diagram of an address resolution device 300.
- FIG. It is a figure which shows the connection sequence example 1.
- FIG. It is a figure which shows the example 2 of a connection sequence.
- each carrier network described below is a core network of a mobile communication carrier, but the present invention is not limited to the case where the carrier network is a core network of a mobile communication carrier.
- the operator network may be a fixed telephone network.
- MNP Mobile Number Portability
- NP Number Portability
- LNP Large Number Portability
- FIG. 2 is a diagram for explaining a configuration example of an IP interconnection network (hereinafter referred to as an interconnection network) in the present embodiment.
- the network configuration shown here is the same as the configuration shown in FIG. 1 as the connection configuration between the operator networks.
- the interconnection network shown in FIG. 2 includes the carrier A network that is the carrier A network, the carrier B network that is the carrier B network, the carrier C network that is the carrier C network, and the carrier D.
- Network D is a network in which the carrier D network is interconnected.
- Each provider network is a communication network in which session control is performed by SIP (Session Initiation Protocol).
- FIG. 2 is a diagram that pays particular attention to the carrier A network, and shows the inter-network connection control device 100 provided at the boundary part of the carrier A network.
- An inter-connection control device may be provided.
- the carrier A network is an IMS network
- the network connection control apparatus 100 includes, for example, functions of IBCF (Interconnection Border Control Function) and / or BGCF (Breakout Gateway Control Function).
- the operator B network is a non-IMS network, for example, an IP Centrex network for the company B company.
- the “IMS network” has an address resolution function such as an ENUM function, and a network that does not have an address resolution function such as an ENUM function is a “non-IMS network”.
- the call control device 200 is provided in the carrier A network, and the call control device 400 is provided in the carrier B network.
- the call control device 200 of the carrier A network which is an IMS network is a device having the S-CSCF function defined by IMS, for example, but is not limited thereto.
- the system according to the present embodiment includes an address resolution device 300.
- the address resolution device 300 is, for example, an ENUM server (Non-Patent Document 2).
- the address resolution device 300 may be provided anywhere as long as it can communicate with the network connection control device 100.
- it may be provided within the operator A network, or may be provided at a predetermined location (address) on the Internet that does not belong to any operator network related to interconnection.
- the network connection control device 100 can also communicate with the call control device 200.
- the network connection control device 100 includes a function of inquiring of the address corresponding to the telephone number to the address resolution device 300 and acquiring the address.
- the function is, for example, an ENUM client function, and the address is, for example, a SIP URI or an IP address.
- the address is not limited to these, and may be other information.
- the call control device 200 of the carrier A network may or may not include a function of inquiring of the address corresponding to the telephone number to the address resolution device 300 and acquiring the address. .
- FIG. 3 shows a functional configuration diagram of the network connection control apparatus 100 according to the present embodiment.
- the network connection control apparatus 100 includes a connection request signal transfer unit 101, an address inquiry unit 102, and a transfer instruction unit 103.
- FIG. 3 shows only the function units particularly related to the embodiment of the present invention in the network connection control device 100, and also has a function (not shown) for performing an operation of connecting between the operator networks. It is. Further, the functional configuration shown in FIG. 3 is merely an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the function unit may be anything.
- connection request signal transfer unit 101 receives a connection request signal transmitted from the UE (user apparatus) and transferred by the call control device in the carrier network, and sends the connection request signal to another address according to the destination of the connection request signal. Includes the ability to transfer to the network.
- the connection request signal transfer unit 101 may include a function of converting a SIP message in order to absorb a difference in the SIP message between the operator networks.
- connection request signal transfer unit 101 when the connection request signal transfer unit 101 receives a connection request signal that is first routed (transferred) from the call control device, the connection request signal transfer unit 101 sets the destination telephone number included in the connection request signal to the address inquiry unit 102. It has a function for instructing the inquiry of the corresponding address. However, when the connection request signal is routed based on the address acquired from the address resolution device 300, the connection request signal is transferred to the destination without instructing an address inquiry.
- the address inquiry unit 102 corresponds to, for example, an ENUM client function, and makes an inquiry to the address resolution device 300 based on a telephone number included in the connection request signal (eg, Tel: E.164 address in Request-URI in URI format). , The address corresponding to the telephone number (eg, SIP URI that can be SIP-routed) is acquired, and the acquisition result is transferred to the transfer instruction unit 103.
- a telephone number included in the connection request signal eg, Tel: E.164 address in Request-URI in URI format.
- the transfer instruction unit 103 instructs the call control device that is the transfer source of the connection request signal that has made an address inquiry to transfer (reroute) the connection request signal toward the address acquired by the address inquiry unit 102.
- a function of returning a rerouting instruction signal It may be considered that a rerouting instruction is performed by transmitting an address instead of such an explicit rerouting instruction signal.
- the network connection control apparatus 100 can be realized, for example, by causing one or a plurality of computers (servers) to execute a program describing the processing contents described in the present embodiment. That is, the function of the network connection control device 100 is to execute a program corresponding to the processing executed by the network connection control device 100 using hardware resources such as a CPU and a memory built in the computer. Can be realized. Further, the program can be recorded on a computer-readable recording medium (portable memory or the like), stored, or distributed. It is also possible to provide the program through a network such as the Internet or electronic mail.
- FIG. 4 shows an example of the hardware configuration of the network connection control apparatus 100 when the network connection control apparatus 100 is configured by the computer as described above.
- the inter-network connection control device 100 includes a CPU 151, a RAM (Random Access Memory) 152, a ROM (Read Only Memory) 153, a communication module 154 for performing communication, and an auxiliary storage device 155 such as a hard disk.
- the CPU 151 When the CPU 151 reads out and executes a program stored in a storage unit such as the RAM 152, the ROM 153, and the auxiliary storage device 155, the operation of each function of the connection request signal transfer unit 101, the address inquiry unit 102, and the transfer instruction unit 103 is executed. Is done. Further, the communication module 154 is used for processing for performing network communication in the processing in each functional unit of the connection request signal transfer unit 101, the address inquiry unit 102, and the transfer instruction unit 103.
- the input device 156 can input setting information to the network connection control device 100, for example, and the output device 157 can output the operating state of the network connection control device 100, for example.
- FIG. 5 shows a functional configuration diagram of the address resolution device 300 according to the present embodiment.
- the address resolution device 300 includes an address resolution unit 301 and a telephone number / address correspondence table storage unit 302.
- FIG. 5 shows only functional units particularly related to the embodiment of the present invention in the address resolution device 300, and also has functions (not shown) for actually performing operations.
- the functional configuration shown in FIG. 5 is only an example. As long as the operation according to the present embodiment can be performed, the function classification and the name of the function unit may be anything.
- the telephone number / address correspondence table storage unit 102 stores a correspondence table (table) in which telephone numbers and addresses are associated with each other.
- the telephone number set in the correspondence table is, for example, the telephone number of the user (UE) accommodated (contracted) by the carrier network interconnected with the carrier A network.
- the telephone number / address correspondence table storage unit 102 transfers the MNP from the operator C to the operator D's network.
- An address indicating the carrier D network is stored as an address corresponding to the telephone number that has become the user (originally the number of the carrier C).
- the “address” recorded in the correspondence table only needs to be an address indicating which carrier network is the transfer destination to which the connection request signal is transferred, and need not be an address that can be specified up to the destination UE. . Of course, it may be an address that can be specified up to the destination UE.
- the address resolution unit 301 When the address resolution unit 301 receives an inquiry signal (for example, ENUM Query) specifying the destination telephone number from the network connection control apparatus 100, the address resolution unit 301 searches the correspondence table in the telephone number / address correspondence table storage unit 302, and the destination telephone number If the address corresponding to the address is found, the address is returned to the network connection control device 100. If there is no address corresponding to the destination telephone number, information indicating that no address exists in the correspondence table is returned to the network connection control device 100. Execute.
- an inquiry signal for example, ENUM Query
- the address resolution device 300 can be realized, for example, by causing one or a plurality of computers (servers) to execute a program describing the processing contents described in the present embodiment. That is, the function of the address resolution device 300 is realized by executing a program corresponding to the process executed by the address resolution device 300 using hardware resources such as a CPU and a memory built in the computer. Is possible. Further, the program can be recorded on a computer-readable recording medium (portable memory or the like), stored, or distributed. It is also possible to provide the program through a network such as the Internet or electronic mail.
- the hardware configuration of the address resolution device 300 when the address resolution device 300 is configured by a computer as described above is the same as that when the network connection control device 100 is configured by a computer, as shown in FIG. It is.
- Connection sequence example 1 is a sequence example when a call connection is made from user B (UE-B) of the carrier B network (non-IMS network) to user D (UE-D) of the carrier D network.
- UE-B user B
- UE-D user D
- connection request signal including the user D called number as a destination is transmitted (step 101).
- the connection request signal reaches the call control device 400.
- the call control device 400 determines that the destination telephone number of the connection request signal is the telephone number of the operator C, and transmits the connection request signal with the operator C network as the destination (step 102).
- the connection request signal transmitted from the provider A network / provider B network connected to another network via the network connection control apparatus 100 to the other network is always sent to the network connection control apparatus 100. Transferred.
- connection request signal sent from the call control device 400 in step 102 reaches the network connection control device 100.
- connection request signal transfer unit 101 determines that the connection request signal is not related to rerouting but is related to the first routing, 102 is instructed to acquire an address corresponding to the user D called number included in the connection request signal.
- the connection request signal transfer unit 101 includes the identification information indicating whether the call control device 400 that transmits the connection request signal relates to rerouting or the first routing, in the connection request signal. It can be determined based on the identification information. Further, when the connection request signal transfer unit 101 receives a connection request signal including the same source telephone number and destination telephone number as the source telephone number and destination telephone number in the first received connection request signal within a predetermined time. In addition, it may be determined that this is a connection request signal related to rerouting.
- the address inquiry unit 102 of the network connection control device 100 transmits an address inquiry signal including the user D called number to the address resolution device 300 (step 103).
- the address resolution unit 301 refers to the telephone number / address correspondence table storage unit 302 to acquire an address corresponding to the user D called number, and controls the connection to the network. Return to device 100 (step 104).
- the address inquiry unit 102 passes the address to the transfer instruction unit 103, and the transfer instruction unit 103 sends a connection request signal to the call control device 400 toward the address.
- a rerouting instruction signal for instructing rerouting is transmitted (step 105).
- the call control device 400 that has received the rerouting instruction signal transmits the connection request signal with the address (address of the carrier D network) as the destination of the connection request signal (step 106). In other words, the connection request signal is rerouted toward the operator D network.
- connection request signal transfer unit 101 determines that the connection request signal is related to rerouting in the inter-network connection control apparatus 100 that has received the rerouted connection request signal
- the connection request signal transfer unit 101 transmits the connection request signal to the operator D network.
- the connection request signal is transferred within the carrier D network and reaches UE-D (step 108). Thereafter, through a predetermined SIP procedure, a call session is established between UE-B and UE-D, and a call between users is started.
- Connection sequence example 2 is a sequence example when a call connection is made from user A (UE-A) of the carrier A network (IMS network) to user D (UE-D) of the carrier D network.
- the call control device 200 in the carrier A network does not have a function of acquiring an address corresponding to the called number from the address resolution device 300 (for example, ENUM function), or has the function. Assume that the operation is OFF.
- a connection request signal including the user D called number as a destination is transmitted (step 201).
- the connection request signal reaches the call control device 200.
- the call control device 200 determines that the destination telephone number of the connection request signal is the telephone number of the operator C, and sends the connection request signal with the operator C network as the destination (step 202).
- the connection request signal sent from the call control device 200 in step 202 reaches the network connection control device 100.
- connection request signal transfer unit 101 determines that the connection request signal is not related to rerouting but is related to the first routing, 102 is instructed to acquire an address corresponding to the user D called number included in the connection request signal.
- the inter-network connection control device 100 determines that the received connection request signal is not a connection request signal sent by routing based on the address acquired from the address resolution apparatus 300, and sends it to the address inquiry unit 102.
- An instruction is given to acquire an address corresponding to the user D called number included in the connection request signal.
- the method for determining that the received connection request signal is a connection request signal transmitted by routing based on the address acquired from the address resolution device 300 is not limited to a specific method.
- the call control device 200 sends a connection request signal by routing based on the address acquired from the address resolution device 300
- the network connection is established by including identification information indicating that in the connection request signal.
- the control device 100 can determine that the connection request signal is sent by routing based on the address acquired from the address resolution device 300.
- the address inquiry unit 102 of the network connection control device 100 transmits an address inquiry signal including the user D called number to the address resolution device 300 (step 203).
- the address resolution unit 301 refers to the telephone number / address correspondence table storage unit 302 to acquire an address corresponding to the user D called number, and controls the connection to the network. Return to the device 100 (step 204).
- the address inquiry unit 102 passes the address to the transfer instruction unit 103, and the transfer instruction unit 103 sends a connection request signal to the call control device 200 toward the address.
- a rerouting instruction signal for instructing rerouting is transmitted (step 205).
- the call control apparatus 200 that has received the rerouting instruction signal transmits the connection request signal with the address (address of the carrier D network) as the destination of the connection request signal (step 206). In other words, the connection request signal is rerouted toward the operator D network.
- connection request signal transfer unit 101 determines that the connection request signal is related to rerouting in the inter-network connection control apparatus 100 that has received the rerouted connection request signal
- the connection request signal transfer unit 101 transmits the connection request signal to the operator D network.
- the connection request signal is transferred within the carrier D network and reaches UE-D (step 208). Thereafter, a call session is established between UE-A and UE-D through a predetermined SIP procedure, and a call between users is started.
- Connection sequence example 3 is a sequence example when a call connection is made from user A (UE-A) of the carrier A network (IMS network) to user D (UE-D) of the carrier D network.
- the call control device 200 in the carrier A network has a function (eg, ENUM function) for acquiring an address corresponding to the called number from the address resolution device 300, and the operation of the function is turned on. To do.
- connection request signal including the user D called number as a destination is transmitted (step 301).
- the connection request signal reaches the call control device 200.
- the call control device 200 transmits an address inquiry signal including the user D called number to the address resolution device 300 (step 302).
- the address resolution unit 301 refers to the telephone number / address correspondence table storage unit 302 to acquire an address corresponding to the user D called number, and uses the address as the call control device 200. (Step 303).
- the call control device 200 that has received the address sends the connection request signal with the address (address of the carrier D network) as the destination of the connection request signal (step 304). That is, the connection request signal is routed to the operator D network.
- the connection request signal sent from the call control device 200 in step 304 reaches the network connection control device 100.
- the connection request signal transfer unit 101 determines that the connection request signal is a connection request signal sent by routing based on the address acquired from the address resolution device 300. Then, the connection request signal is sent to the carrier D network without performing the address acquisition process from the address resolution device 300 (step 305). The connection request signal is transferred within the carrier D network and reaches UE-D (step 306). Thereafter, a call session is established between UE-A and UE-D through a predetermined SIP procedure, and a call between users is started.
- connection control device used in an interconnection network, and receives a connection request signal addressed to another communication network from a call control device in a certain communication network.
- a connection request signal transfer unit, and an address inquiry unit that queries an address resolution device for an address corresponding to a destination telephone number included in the connection request signal received by the connection request signal transfer unit, and acquires the address from the address resolution device
- a transfer instruction unit that instructs the call control device to transfer the connection request signal to the address acquired by the address inquiry unit.
- call connection from a communication network having no address resolution function such as an ENUM function to other communication networks is properly performed. Can be performed.
- connection request signal transfer unit transfers the connection request signal to the other communication network. It may be. With this configuration, it is possible to avoid performing an operation of acquiring an address from the address resolution device again with respect to a connection request signal that has already acquired an address from the address resolution device.
- connection request signal transfer unit When the connection request signal received from the call control device is transferred based on the address acquired from the address resolution device, the connection request signal transfer unit sends the connection request signal to the other communication network. You may make it forward. With this configuration, it is possible to avoid performing an operation of acquiring an address from the address resolution device again with respect to a connection request signal that has already acquired an address from the address resolution device.
- the interconnection network is a network in which communication networks in which session control by SIP is performed are interconnected, and the inter-network connection control device is provided at a boundary portion of the communication network.
- the present invention can be effectively applied to, for example, an IMS network and other SIP networks.
- the telephone number is E. 164
- the address is a SIP URI or an IP address.
- an ENUM server can be used as an address resolution device.
- each device has been described using a functional block diagram. However, such a device may be implemented in hardware, software, or a combination thereof.
- Software that is operated by a processor included in each device according to the embodiment of the present invention includes random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD It may be stored in any suitable storage medium such as ROM, database, server, etc.
- network connection control device 20 call control device 30 address resolution device 40 call control device 100 network connection control device 101 connection request signal transfer unit 102 address inquiry unit 103 transfer instruction unit 151 CPU 152 RAM 153 ROM 154 Communication module 155 Auxiliary storage device 156 Input device 157 Output device 200 Call control device 300 Address resolution device 301 Address resolution unit 302 Telephone number / address correspondence table storage unit 400 Call control device
Abstract
Description
ある通信網における呼制御装置から他通信網宛ての接続要求信号を受信する接続要求信号転送部と、
前記接続要求信号転送部により受信した前記接続要求信号に含まれる宛先電話番号に対応するアドレスをアドレス解決装置に問い合わせ、当該アドレス解決装置から前記アドレスを取得するアドレス問い合わせ部と、
前記呼制御装置に対し、前記アドレス問い合わせ部により取得した前記アドレス宛てに前記接続要求信号を転送するよう指示する転送指示部と
を備える網間接続制御装置が提供される。
ある通信網における呼制御装置から他通信網宛ての接続要求信号を受信し、当該接続要求信号に含まれる宛先電話番号に対応するアドレスをアドレス解決装置に問い合わせ、当該アドレス解決装置から前記アドレスを取得するアドレス問い合わせステップと、
前記呼制御装置に対し、前記アドレス問い合わせステップにより取得した前記アドレス宛てに前記接続要求信号を転送するよう指示する転送指示ステップと
を備える接続制御方法が提供される。
前記呼制御装置が、ユーザ装置から送出された接続要求信号を受信するステップと、
前記呼制御装置が、前記接続要求信号に含まれる宛先電話番号に基づいて、当該接続要求信号を他通信網宛てに送出するステップと、
前記網間接続制御装置が、前記接続要求信号を受信し、当該接続要求信号に含まれる宛先電話番号に対応するアドレスをアドレス解決装置に問い合わせ、当該アドレス解決装置から前記アドレスを取得するアドレス問い合わせステップと、
前記網間接続制御装置が、前記呼制御装置に対し、前記アドレス問い合わせステップにより取得した前記アドレス宛てに前記接続要求信号を転送するよう指示する転送指示ステップと、
前記呼制御装置が、前記指示に従って、前記アドレス宛てに前記接続要求信号を転送するステップと
を備える接続制御方法が提供される。
図2は、本実施の形態におけるIP相互接続網(以下、相互接続網と呼ぶ)の構成例を説明するための図である。ここに示す網構成は、事業者網間の接続構成としては図1に示した構成と同様である。
次に、上記システムにおける網間接続制御装置100とアドレス解決装置300の構成例を説明する。
図3に、本実施の形態における網間接続制御装置100の機能構成図を示す。図3に示すように、網間接続制御装置100は、接続要求信号転送部101、アドレス問い合わせ部102、転送指示部103を含む。
図5に、本実施の形態におけるアドレス解決装置300の機能構成図を示す。図5(a)示すように、アドレス解決装置300は、アドレス解決部301と、電話番号/アドレス対応表格納部302を備える。
<接続シーケンス例1>
次に、本実施の形態に係るシステムの動作例として、図6を参照して接続シーケンス例1を説明する。接続シーケンス例1は、事業者B網(非IMS網)のユーザB(UE-B)から事業者D網のユーザD(UE-D)に呼接続を行う場合のシーケンス例である。
続いて、本実施の形態に係るシステムの動作例として、図7を参照して接続シーケンス例2を説明する。接続シーケンス例2は、事業者A網(IMS網)のユーザA(UE-A)から事業者D網のユーザD(UE-D)に呼接続を行う場合のシーケンス例である。本例では、事業者A網における呼制御装置200は、アドレス解決装置300から着番号に対応するアドレスを取得する機能(例:ENUM機能)を有しない、もしくは、当該機能を有していても動作をOFFとしているものとする。
次に、本実施の形態に係るシステムの動作例として、図8を参照して接続シーケンス例3を説明する。接続シーケンス例3は、事業者A網(IMS網)のユーザA(UE-A)から事業者D網のユーザD(UE-D)に呼接続を行う場合のシーケンス例である。本例では、事業者A網における呼制御装置200は、アドレス解決装置300から着番号に対応するアドレスを取得する機能(例:ENUM機能)を有し、当該機能の動作をONとしているものとする。
20 呼制御装置
30 アドレス解決装置
40 呼制御装置
100 網間接続制御装置
101 接続要求信号転送部
102 アドレス問い合わせ部
103 転送指示部
151 CPU
152 RAM
153 ROM
154 通信モジュール
155 補助記憶装置
156 入力装置
157 出力装置
200 呼制御装置
300 アドレス解決装置
301 アドレス解決部
302 電話番号/アドレス対応表格納部
400 呼制御装置
Claims (7)
- 相互接続網において使用される網間接続制御装置であって、
ある通信網における呼制御装置から他通信網宛ての接続要求信号を受信する接続要求信号転送部と、
前記接続要求信号転送部により受信した前記接続要求信号に含まれる宛先電話番号に対応するアドレスをアドレス解決装置に問い合わせ、当該アドレス解決装置から前記アドレスを取得するアドレス問い合わせ部と、
前記呼制御装置に対し、前記アドレス問い合わせ部により取得した前記アドレス宛てに前記接続要求信号を転送するよう指示する転送指示部と
を備える網間接続制御装置。 - 前記呼制御装置から受信した接続要求信号が、前記転送指示部による指示に基づき転送されたものである場合に、前記接続要求信号転送部は、前記接続要求信号を前記他通信網に転送する
請求項1に記載の網間接続制御装置。 - 前記呼制御装置から受信した接続要求信号が、前記アドレス解決装置から取得されたアドレスに基づき転送されたものである場合に、前記接続要求信号転送部は、前記接続要求信号を前記他通信網に転送する
請求項1に記載の網間接続制御装置。 - 前記相互接続網は、SIPによるセッション制御が行われる通信網が相互接続された網であり、前記網間接続制御装置は、通信網の境界部分に備えられる
請求項1ないし3のうちいずれか1項に記載の網間接続制御装置。 - 前記電話番号はE.164に準拠した電話番号であり、前記アドレスはSIP URI又はIPアドレスである
請求項4に記載の網間接続制御装置。 - 相互接続網において使用される網間接続制御装置が実行する接続制御方法であって、
ある通信網における呼制御装置から他通信網宛ての接続要求信号を受信し、当該接続要求信号に含まれる宛先電話番号に対応するアドレスをアドレス解決装置に問い合わせ、当該アドレス解決装置から前記アドレスを取得するアドレス問い合わせステップと、
前記呼制御装置に対し、前記アドレス問い合わせステップにより取得した前記アドレス宛てに前記接続要求信号を転送するよう指示する転送指示ステップと
を備える接続制御方法。 - 相互接続網において使用される網間接続制御装置と、当該相互接続網におけるある通信網に備えられる呼制御装置とを含む通信システムにおいて実行される接続制御方法であって、
前記呼制御装置が、ユーザ装置から送出された接続要求信号を受信するステップと、
前記呼制御装置が、前記接続要求信号に含まれる宛先電話番号に基づいて、当該接続要求信号を他通信網宛てに送出するステップと、
前記網間接続制御装置が、前記接続要求信号を受信し、当該接続要求信号に含まれる宛先電話番号に対応するアドレスをアドレス解決装置に問い合わせ、当該アドレス解決装置から前記アドレスを取得するアドレス問い合わせステップと、
前記網間接続制御装置が、前記呼制御装置に対し、前記アドレス問い合わせステップにより取得した前記アドレス宛てに前記接続要求信号を転送するよう指示する転送指示ステップと、
前記呼制御装置が、前記指示に従って、前記アドレス宛てに前記接続要求信号を転送するステップと
を備える接続制御方法。
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