JP2011030156A - Home gateway device and number portability control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically switch a connection target of a line in a home gateway device from a public phone line net to a VoIP net after number portability is finished. <P>SOLUTION: The device has a switching part 1 which connects a phone 110 to either a public phone line net 120 side or a VoIP net 130 side and a special number communication part 2 which transmits a predetermined special number to an SIP server 140 via the VoIP net 130 and receives a response to the transmission. When number portability is introduced, the special number communication part 2 transmits a special number periodically until it receives a response showing that a processing for introducing number portability is finished from the SIP server 140. The switching part 1 switches the state wherein the phone 110 is connected to the public phone line net 120 side to the state wherein it is connected to the VoIP net 130 side if the special number communication part 2 receives a response showing that a processing for introducing number portability is finished. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a home gateway that automatically switches a line connection to be used for outgoing calls in a home gateway device from a public telephone line network to a VoIP network based on the progress of processing in a line carrier for introducing number portability. The present invention relates to a device and a number portability control method.

  The telephone service includes a telephone service (fixed telephone) using a public switched telephone network (PSTN) and a telephone service (IP telephone) using a VoIP (Voice over Internet Protocol) network.

  When the user desires to change the telephone service to be used from a fixed telephone to an IP telephone with number portability, a process for implementing number portability is performed. In the following, “number portability” means processing for making the same telephone number usable even if the line operator is changed, unless otherwise specified. By implementing VoIP number portability, the PSTN relay switcher switches between incoming calls to the target phone number to the PSTN or VoIP network, and the user selects the phone number used on the landline phone. It can be used for IP phones after line switching.

  However, when switching from a PSTN line to a VoIP line with VoIP number portability, after the number portability in the station equipment (fixed telephone side) on the PSTN side is completed, the user is an IP telephone provider. A VoIP provider must go to the user's home and connect the telephone to the IP line side. In this case, for example, the connection destination of the telephone is changed from the PSTN side to the home gateway device. When the user is to connect to the IP line side, the VoIP provider must notify the user that the processing on the fixed telephone side has been completed.

  In addition, when the home gateway device can be automatically set by remote operation, the VoIP carrier periodically checks whether the line switching on the fixed telephone side has been performed, and then makes a predetermined setting to the home gateway device. Download the settings. These operations are troublesome for both users and VoIP operators.

  Patent Literature 1 describes a gateway device for connecting a fixed telephone. The dateway device described in Patent Document 1 is also connected to the Internet, VoIP network, PSTN, etc., and controls a home network.

  Patent Document 2 describes a number portability service method in a telecommunications system. In the number portability service method described in Patent Document 2, when communication is performed between the first station and the second station, it is determined whether or not the partner station is a station in which number portability is implemented. If the station is the one where number portability is implemented, the supplementary telecommunication service is used.

Japanese Patent Laying-Open No. 2008-28600 (FIG. 1, paragraphs 0034-0035) Japanese translation of PCT publication No. 2003-503978 (FIG. 3, paragraph 0017, paragraph 0021)

  However, although the gateway device described in Patent Document 1 can be connected to both the PSTN and the VoIP network, it is not a gateway device that performs line switching by implementing number portability.

  Further, Patent Document 2 describes a number portability service method, but there is no description about processing for enabling the service method.

  In the present invention, when number portability is implemented (when processing for introducing number portability is performed), after completion of number portability, the connection destination of the line in the home gateway device is changed from the public telephone line network to the VoIP network. An object of the present invention is to provide a home gateway device and a number portability control method that are automatically switched to each other.

  A home gateway device according to the present invention is a home gateway device that enables a telephone to communicate over either a public telephone line network or a VoIP network, and the telephone is connected to either the public telephone line network side or the VoIP network side. A switching unit that connects to the mobile phone, and a special number communication unit that sends a predetermined special number to the SIP server via the VoIP network and receives a response to the call from the SIP server. When introducing the number portability that enables the telephone number used in the fixed telephone service to be used in the IP telephone service, a response indicating that the process for introducing the number portability is completed is received from the SIP server. The special number is sent periodically until the switching unit has completed the process for introducing number portability. Special numbers communication unit a response indicating bets is when receiving from the SIP server, the phone and switches the state of being connected from the state of being connected to a public telephone line network side to the VoIP network side.

  A number portability control method according to the present invention is a number portability control method using a home gateway device that enables a telephone to make a call via either a public telephone line network or a VoIP network. A call to a SIP server via the VoIP network, receiving a response to the call from the SIP server, and connecting the telephone to either the public telephone line network side or the VoIP network side. When introducing the number portability that enables the telephone number used in the service to be used in the IP telephone service, it is periodically performed until a response indicating that the processing for introducing the number portability is completed is received from the SIP server. Process to introduce special port numbers and introduce number portability. When receiving from the SIP server response indicating the phone and switches the state of being connected from the state of being connected to a public telephone line network side to the VoIP network side.

  According to the present invention, the home gateway device transmits a special number and determines the progress of the line switching process on the fixed port side of the number portability by the response, and the connection destination of the line in the home gateway device is set as a public telephone line. It is possible to automatically switch from the network to the VoIP network.

It is a block diagram which shows the structure of the number portability control system using the home gateway apparatus of 1st Embodiment by this invention. It is a block diagram which shows the structure of the home gateway apparatus shown in FIG. It is a flowchart which shows the operation | movement in the number portability control system shown in FIG. It is explanatory drawing which shows an example of a switch control register table. It is a block diagram which shows the principal part of the home gateway apparatus by this invention.

Embodiment 1. FIG.
FIG. 1 is a block diagram showing the configuration of a number portability control system using the home gateway device of the first embodiment (embodiment 1) according to the present invention. FIG. 2 is a block diagram showing a configuration of the home gateway device shown in FIG. With reference to FIG. 1 and FIG. 2, the structure of the home gateway apparatus and number portability control system of the 1st Embodiment of this invention is demonstrated.

  The number portability control system shown in FIG. 1 includes a home gateway device 10, a number portability management database 20, a SIP server 30, a telephone 40, an Internet line 50, and a public telephone line 60.

  A telephone 40, an Internet line 50 and a public telephone line 60 are connected to the home gateway device 10. The telephone set 40 connected to the home gateway device 10 can make a call on the PSTN or the VoIP network via the home gateway device 10. When a call is made using a fixed telephone, a PSTN (not shown) is used through the public telephone line 60. When making a call using an IP phone, a VoIP network (not shown) is used through the Internet line 50.

  The home gateway device 10 communicates with the SIP server 30 via the Internet line 50. The SIP server 30 periodically checks the progress of the number portability processing stored in the number portability management database 20. The number portability management database 20 stores information indicating the progress status of number portability processing for each home gateway device. The progress of the number portability process indicates whether the PSTN relay exchange connects the target telephone number to the PSTN or the VoIP network. The operation of switching the call transmission connected to the PSTN by the relay exchange so as to connect to the VoIP network is called a line switching operation on the fixed telephone side.

  The home gateway device 10 includes a telephone line interface 11, a WAN interface 12, a telephone interface 13, a switch circuit 14, a voice codec 15, and a CPU 16.

  A public telephone line 60 is connected to the telephone line interface 11. The telephone line interface 11 transmits / receives analog voice data to / from the PSTN during a fixed telephone call. The WAN interface 12 is connected to the Internet line 50. The WAN interface 12 transmits and receives IP packets to and from the VoIP network during an IP telephone call. The telephone interface 13 is connected to the telephone 40 and transmits / receives analog voice data to / from the telephone 40.

  The switch circuit 14 connects the telephone interface 13 to the telephone line interface 11 side or the WAN interface 12 side. When the switch circuit 14 connects the telephone interface 13 to the WAN interface 12 side, the telephone interface 13 is connected to the voice codec 15 and is connected from the voice codec 15 to the WAN interface 12 via the CPU 16.

  The audio codec 15 performs conversion between analog audio data and digital audio data as well as compression and expansion of the digital audio data. The voice codec 15 converts the digital voice data included in the IP packet received by the WAN interface 12 into analog voice data, and the telephone interface 11 converts the analog voice data received from the telephone 40 into digital voice data.

  The CPU 16 controls the home gateway device 10 as a whole. For example, the CPU 16 analyzes the IP packet received by the WAN interface 12 to confirm the message, or controls the switch circuit 14 to switch the switch. The CPU 16 is controlled according to a program, for example.

  FIG. 3 is a flowchart showing operations such as number portability status confirmation in the number portability control system shown in FIG. With reference to FIG. 3, an operation of switching a line in the home gateway device when number portability is performed will be described.

  When the power of the home gateway device 10 is turned on, the CPU 16 starts checking the implementation status of number portability (step S11). Confirmation of the implementation status of number portability may be started by a predetermined operation in the home gateway device 10.

  When execution of number portability is started in step S11, the CPU 16 of the home gateway device 10 transmits a packet “100 invite” with a special number to the VoIP network via the WAN interface 12 (step S12). A special number is a number assigned by a VoIP provider for confirmation of number portability, and is a number of a system different from a normal telephone number system. The special number transmitted from the home gateway device 10 reaches the SIP server 30 via the VoIP network.

  When the SIP server 30 receives the packet (step S13), it confirms the content of “to” of the header “message header” included in the SIP part of the packet “100 invite”, and the destination of the packet is a special number. Confirm that the message was sent to confirm portability. Next, the SIP server 30 confirms the contents of “from” of the header “message header” included in the SIP part of the packet “100 invite”, and the telephone number as the VoIP terminal assigned to the home gateway device 10. Read. The SIP server 30 can specify the transmission source (home gateway device 10) of the packet “100 invite” from the read telephone number. The SIP server 30 refers to the number portability management database 20 and confirms whether or not the line switching operation on the fixed telephone side has been completed for the home gateway device 10 of the transmission source (step S14).

  If the line switching operation on the fixed telephone side is not completed in step S14, the SIP server 30 returns a response of the packet “404 Not found” to the home gateway device 10 that has transmitted the special number. (Step S15). When the home gateway device 10 receives the packet “404 Not found”, the CPU 16 transmits the specially transmitted packet “100 invite” again after a predetermined time (step S12).

  In step S15, if the line switching operation on the fixed telephone side has not been completed, the SIP server 30 responds to the home gateway device 10 that has transmitted the special number with a packet “404 Not found” response. For example, a response of packet “380 Alternative Service” may be returned as another response packet. When the home gateway device 10 receives such a packet, after a predetermined time has elapsed, the CPU 16 transmits a special outgoing packet “100 invite” again (step S12).

  If the line switching operation on the fixed telephone side has been completed in step S14, the SIP server 30 returns a response packet “200 OK” to the home gateway device 10 that has transmitted the special number (step S14). S16). When the home gateway device 10 receives the response packet “200 OK”, the CPU 16 sets “1” in the device internal register of the switch control register table (step S17). The switch control register table is stored in a storage unit (not shown).

  FIG. 4 is an explanatory diagram showing an example of the switch control register table. The number portability state shown in FIG. 4 indicates the work status of line switching on the fixed telephone side. When the number portability state shown in FIG. 4 is not completed, the value of the internal register of the device is “0”. At this time, the switch circuit 14 connects the telephone interface 13 to the PSTN telephone line interface 11 side. When the number portability state shown in FIG. 4 is completed, the value of the device internal register is “1”.

  When "1" is set in the device internal register of the switch control register table in step S17, the CPU 16 controls the switch circuit 14 to connect the telephone interface 13 connected to the telephone line interface 11 side to the Internet line 50. The switch is switched to connect to the WAN interface 12 connected to the VoIP network (step S18). When the telephone interface 13 is connected to the WAN interface 12 side, the user can use the IP telephone with the telephone number used for the fixed telephone.

  In such a home gateway device, the home gateway device 10 makes a call to a special number to check the work status of line switching on the fixed telephone side, and when the work is completed, the switch circuit 14 is automatically switched to switch the telephone interface 13 to the WAN. Since the connection is made on the interface 12 side, there is no need for the user or the VoIP provider to manually set the line switching. Further, even when the work status of line switching on the fixed telephone side is not completed at the first confirmation, the home gateway device 10 makes a call to a special number periodically until the work is completed. There is no need for operators. Overall, users and VoIP operators can simplify the process of introducing number portability by VoIP.

  Further, when the home gateway device 10 receives a response of the packet “404 Not found” or the packet “380 Alternative Service” from the SIP server 30 in step S15, the home gateway device 10 periodically re-transmits the special number every time a predetermined time elapses. Instead of repeating, it may be possible to change the re-transmission interval. For example, if the work completion schedule timing for line switching on the fixed telephone side is known in advance, the retransmission interval is made shorter than the normal interval in the vicinity of the work completion schedule timing. The re-calling interval may be set in the home gateway device 10 by remote control by the VoIP provider.

Embodiment 2. FIG.
The configuration of the number portability control system using the home gateway device of the second embodiment (Embodiment 2) according to the present invention is the same as that of the number portability control system shown in FIG. 1 except that the home gateway device 10 has power supply detection means. Same as the configuration. The power supply detection means has a function for detecting the public telephone line 60 and detects the power supply status on the public telephone line 60 side.

  When the number portability by VoIP is implemented, when the line switching operation is completed on the fixed telephone side, the power supply from the public telephone line 60 side may be stopped. Therefore, when the power supply detecting means detects that the power supply is stopped from the state where power is supplied from the public telephone line 60 side to the telephone line interface 11, the line switching work is performed on the fixed telephone side. Can be considered complete.

  At this time, the CPU 16 transmits a packet “100 invite” to the special number from the WAN interface 12 using the VoIP network. The operation after the CPU 16 transmits the special number is the same as the operation after the special number is transmitted in the home gateway device of the first embodiment (for example, corresponding to the operations in steps S12 to S18 in FIG. 3). .

  In such a home gateway device, a call to a special number is made as soon as a stoppage of power supply from the public telephone line 60 is detected, so the work status of line switching on the fixed telephone side in the implementation of number portability is quickly confirmed. be able to.

  Note that the home gateway device of the first or second embodiment may include special number transmission means that allows the home gateway device 10 to immediately transmit a special number. For example, the special number transmission means transmits the special number by pressing a predetermined button by the user or the VoIP provider. You may set the special number transmission timing by remote control. In such a home gateway device, for example, when the completion timing of line switching on the fixed telephone side is clear, a special number can be immediately transmitted at that timing to quickly connect the telephone line to the IP phone. it can.

  In addition, during the implementation of number portability by VoIP, when the line switching operation on the fixed telephone side is completed but the line switching operation on the home gateway device 10 side is not finished, When an attempt is made to make a call from the telephone line interface 11 via the public telephone line 60 of the fixed telephone, when a telephone call is made to the telephone 40, the WAN interface 12 of the home gateway apparatus 10 is connected via the IP telephone VoIP network. Incoming call. Therefore, in the home gateway device 10 of the first or second embodiment, when the WAN interface 12 receives an incoming call from the VoIP network before determining completion of line switching on the fixed telephone side, The line switching work is considered complete. At this time, the CPU 16 may perform control to switch the switch circuit 14 to connect the telephone interface 13 to the WAN interface 12 side.

  FIG. 5 is a block diagram showing a main part of the home gateway device according to the present invention. As shown in FIG. 5, the home gateway apparatus 100 uses a telephone 110 (for example, equivalent to the telephone 40 shown in FIG. 1) and a public telephone network 120 (for example, the public telephone line 60 and PSTN (not shown) in FIG. 1). 1) and a VoIP network 130 (for example, corresponding to the Internet circuit 50 and the VoIP network (not shown) shown in FIG. 1), 1 is connected to either the public telephone network 120 side or the VoIP network 130 side, and a SIP server 140 (for example, the SIP server shown in FIG. 1) is connected to the predetermined special number via the VoIP network 130. 30) and a special number communication unit 2 for receiving a response to the call from the SIP server 140, and a special number communication unit In the case of introducing the number portability for enabling the telephone number used in the fixed telephone service to be used in the IP telephone service, the SIP server 140 sends a response indicating that the processing for introducing the number portability is completed. When the special number communication unit 2 receives a response from the SIP server 140 indicating that the processing for introducing number portability has been completed, the special number is periodically transmitted until it is received from the SIP server 140. Is configured to switch from a state where the telephone 110 is connected to the public telephone line network 120 side to a state where it is connected to the VoIP network 130 side.

  In each of the above embodiments, home gateway devices as shown in the following (1) to (4) are also disclosed.

(1) Power supply detection means (for example, equivalent to the power supply detection means in the home gateway device of the second embodiment) for detecting the power supply status from the public telephone line network, and the special number communication unit, A home gateway device that transmits a special number when it is detected that power supply is stopped from a state where power is supplied from a public telephone network.

(2) If the special number communication unit receives a response indicating that processing for introducing number portability has not been completed in the designated time zone, the special number communication unit sets an interval for retransmitting the special number thereafter. Home gateway device to be shortened (for example, this is realized by an operation of shortening the interval of re-sending when the scheduled timing of completion of line switching work on the fixed telephone side is known in advance).

(3) When the switching unit receives an incoming call from the VoIP network before receiving a response indicating that the special number communication unit has completed processing for introducing number portability, the telephone set is connected to the public telephone line. Home gateway device that switches from a state connected to the network side to a state connected to the VoIP network side (for example, in the home gateway device 10 of the first or second embodiment, completion of line switching on the fixed telephone side) When the WAN interface 12 receives an incoming call from the VoIP network before the determination is made, the CPU 16 switches the switch circuit 14 to connect the telephone interface 13 to the WAN interface 12 side.

(4) The special number communication unit sends a special number immediately in response to a command from the outside (for example, the home gateway device 10 of the first or second embodiment forces the special number to be transmitted) This is realized by having a special number transmitting means for performing automatic transmission and the special number transmitting means immediately transmits the special number by pressing a predetermined button or the like).

DESCRIPTION OF SYMBOLS 1 Switching part 2 Special number communication part 10 Home gateway apparatus 11 Telephone line interface 12 WAN interface 13 Telephone interface 14 Switch circuit 15 Voice codec 16 CPU
20 Number Portability Management Database 30 SIP Server 40 Telephone 50 Internet Line 60 Public Telephone Line 100 Home Gateway Device 110 Telephone 120 Public Telephone Line Network 130 VoIP Network 140 SIP Server

Claims (7)

A home gateway device that enables a telephone to communicate over a public telephone line network or a VoIP network,
A switching unit for connecting the telephone to either the public telephone network side or the VoIP network side;
A special number communication unit that sends a predetermined special number to a SIP server via a VoIP network and receives a response to the call from the SIP server;
The special number communication unit indicates that the process for introducing the number portability is completed when the number portability for making the telephone number used in the fixed telephone service available in the IP telephone service is introduced. A special number is periodically sent until a response is received from the SIP server,
When the special number communication unit receives a response indicating that processing for introducing number portability is completed from the SIP server, the switching unit is connected to the public telephone line network side. The home gateway apparatus is switched from a connected state to a connected state to the VoIP network side. Provided with power supply detection means for detecting the power supply status from the public telephone network,
The home gateway device according to claim 1, wherein the special number communication unit transmits the special number when the power supply detection unit detects that the power supply is stopped from a state where power is supplied from the public telephone line network. . When the special number communication unit receives a response indicating that the process for introducing number portability is not completed in the designated time zone, the special number communication unit shortens the interval for resending the special number thereafter. The home gateway apparatus according to claim 1 or 2. When the switching unit receives an incoming call from the VoIP network before receiving a response indicating that the processing for introducing the number portability by the special number communication unit is completed, the switching unit receives the call from the public telephone line network side. The home gateway device according to any one of claims 1 to 3, wherein the home gateway device is switched from a state connected to the VoIP network side to a state connected to the VoIP network side. The home gateway device according to any one of claims 1 to 4, wherein the special number communication unit immediately transmits the special number in response to a command from the outside. A number portability control method using a home gateway device that enables a telephone to communicate over either a public telephone line network or a VoIP network,
Sending a predetermined special number to the SIP server via the VoIP network, and receiving a response to the call from the SIP server;
Connecting the telephone to either the public telephone network side or the VoIP network side,
When introducing the number portability that enables the telephone number used in the fixed telephone service to be used in the IP telephone service,
A special number is periodically transmitted until a response indicating that processing for introducing number portability is completed is received from the SIP server,
When a response indicating that the processing for introducing number portability is completed is received from the SIP server, the telephone is connected to the VoIP network side from the state connected to the public telephone line network side. A number portability control method, characterized in that the number portability is switched to an existing state. The number portability control method according to claim 6, wherein the special number is transmitted when it is detected that the power supply is stopped from the state where power is supplied from the public telephone network by the home gateway device.

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