JP7414215B1 - Telephone number investigation device, investigation method, investigation program, and information provision system - Google Patents

Abstract

An object of the present invention is to determine the usage status of a telephone number in an IMS network by using an IMS interconnection interface or the like for interconnection between carriers. [Solution] A telephone number investigation device 10 is connected to a plurality of metal IP telephone terminals (60a) connected to a calling fixed IMS network 20 via the calling fixed IMS network 20, and also connected to a called fixed IMS network 20. A plurality of metal IP telephone terminals (60b) connected to the IMS network 30 are connected via the originating fixed IMS network 20, and SDP parameters are added to the INVITE request to the metal IP telephone terminal 60 to be investigated (investigation). An INVITE request is sent to the originating fixed IMS network 20 (toward the target metal IP telephone terminal 60), and a response message is received via at least the originating fixed IMS network 20, and the INVITE request is sent to the target metal IP telephone terminal 60. The usage status of the telephone number of the metal IP telephone terminal 60 is determined. [Selection diagram] Figure 1

Description

The present invention relates to technology for investigating telephone numbers.

As a conventional technology regarding determination of telephone number information, there is a telephone number information determination device using a computer server connected to multiple terminals via the Internet network, and a database that stores usage history information of multiple telephone numbers. and a search information receiving means that accepts a telephone number as search information from the terminal, on the condition that authentication information is received from the terminal and the authentication means permits login, and a database is created using the telephone number accepted by the search information receiving means. Search and analyze if there are multiple histories of transitions from subscription status to missing number status in the phone number history information, and/or analyze missing number changes in the phone number field, and/or Analyze the valid change in the phone number field to see if there are multiple histories that transition to the subscribed state, and check whether there is an unaccumulated history of phone number history information, one of the most recent investigation records of the phone number history information is missing number history, or one of the most recent investigation records. The previous investigation record refers to the missed number history and multiple call stop histories present in the telephone number history information, and generates history determination information for determining that the telephone number in the search information is a predetermined subscriber number. A telephone number information determination device is known, which includes: , and system control means for displaying this history determination information on a terminal via the Internet (see Patent Document 1).

Japanese Patent Application Publication No. 2014-060796

By the way, with the transition from PSTN (Public Switched Telephone Networks) to NGN (Next Generation Network), the interconnection interface between carriers has changed from the common channel signaling system SS7 (Signaling System No. 7) to IP ( The protocol will be changed to SIP (Session Initiation Protocol) based on Internet Protocol. For this reason, a specific SIP message from a calling terminal (for example, a telephone number investigation device) may reach the IMS (IP Multimedia Subsystem) network, NGN network, and IP telephone network (VoIP: Voice over Internet Protocol). Become.

IMS is a standard for converting services that have previously been provided via fixed networks and mobile communications to IP and realizing integrated multimedia services. There are mobile communication systems and NGN.

For this reason, an IMS interconnection interface is used for interconnection between carriers to determine the usage status of telephone numbers in the destination IMS network, and a UNI (User Network Interface) connection is possible with the originating IMS network. It is necessary to introduce a telephone number investigation tool based on the SIP protocol to ensure a smooth transition to the new system infrastructure.

Accordingly, one aspect of the present invention is to provide a technology that can determine the usage status of telephone numbers in an IMS network by using an IMS interconnection interface or the like for interconnection between carriers.

In order to solve the above-mentioned problems, a telephone number investigation device according to the present invention connects a plurality of metal IP telephone terminals connected to a fixed IMS network on the originating side and a plurality of metal IP telephone terminals connected to the fixed IMS network on the terminating side. A phone number investigation device connected to at least one of a telephone terminal and the originating side fixed IMS network, which adds SDP parameters to an INVITE request to the metal IP telephone terminal to be investigated, and adds an SDP parameter to the originating INVITE request. a message exchange control unit that transmits the INVITE request to the fixed IMS network on the side and receives a response message via at least the fixed IMS network on the originating side; and a telephone of the metal IP phone terminal to be investigated in response to the response message. a telephone number investigation determination unit that determines the usage status of the number, and the SDP parameters are such that the network protocol is IPv4, the media type is audio only, the media transport protocol is RTP/AVP only, and the audio codec is G. 711 μ-law and G. 722.

In the telephone number investigation device according to the present invention, when the response message is code 180 Ringing, code 200 OK, or code 486 Busy Here, the telephone number investigation determination unit determines whether the metal IP telephone terminal to be investigated is If it is determined that the telephone number exists and the response message is code 404 Not Found, it is determined that the telephone number of the metal IP telephone terminal to be investigated is a missing number, and the response message is code 410 Gone. In this case, the metal IP telephone terminal to be investigated may be relocated and the telephone number may be determined to be vacant.

In the telephone number investigation device according to the present invention, when the response message is code 180 Ringing, the telephone number investigation determination unit determines that the telephone number of the metal IP telephone terminal to be investigated exists; The message exchange control unit may transmit a CANCEL request to the originating fixed IMS network to stop the ringing of the call bell of the metal IP telephone terminal to be investigated.

In the telephone number investigation device according to the present invention, when the response message is code 200 OK, the telephone number investigation determination unit determines that the telephone number of the metal IP telephone terminal to be investigated exists; The message exchange control unit may disconnect communication with the metal IP telephone terminal to be investigated by transmitting a BYE request to the originating fixed IMS network.

The telephone number investigation device according to the present invention further includes a voice conversion section, and when the response message is code 410 Gone, the telephone number investigation determination section determines that the metal IP telephone terminal to be investigated is relocated. The voice conversion unit converts the voice data transmitted as relocation guidance into text data and converts the phone number information of the relocation destination of the metal IP phone terminal to be investigated into text data. may be obtained.

Further, the telephone number investigation method according to the present invention is applicable to a plurality of metal IP telephone terminals connected to the originating fixed IMS network and a plurality of metal IP telephone terminals connected to the destination fixed IMS network. A telephone number investigation method that investigates the usage status of the telephone number of the metal IP telephone terminal to be investigated using a device connected to at least one of the terminals via the originating fixed IMS network, the device the step of transmitting the INVITE request to the originating fixed IMS network by adding SDP parameters to the INVITE request for the metal IP telephone terminal to be investigated, and receiving a response message via at least the originating fixed IMS network. and determining the usage status of the phone number of the metal IP phone terminal to be investigated in response to the response message, and the SDP parameters include a network protocol of IPv4, a media type of audio only, The media transport protocol is RTP/AVP only, and the audio codec is G. 711 μ-law and G. 722.

The telephone number investigation method according to the present invention determines that the telephone number of the metal IP telephone terminal to be investigated exists when the response message is code 180 Ringing, code 200 OK, or code 486 Busy Here. , if the response message is code 404 Not Found, it is determined that the telephone number of the metal IP telephone terminal to be investigated is a missing number, and if the response message is code 410 Gone, the telephone number of the metal IP telephone terminal to be investigated is determined to be missing. The metal IP telephone terminal may be relocated and the telephone number may be determined to be unused.

The telephone number investigation method according to the present invention determines that the telephone number of the metal IP telephone terminal to be investigated exists when the response message is code 180 Ringing, and sends a CANCEL request to the originating fixed IMS network. By transmitting this, the ringing of the call bell of the metal IP telephone terminal to be investigated may be stopped.

The telephone number investigation method according to the present invention determines that the telephone number of the metal IP telephone terminal to be investigated exists when the response message is code 200 OK, and sends a BYE request to the originating fixed IMS network. By transmitting this, communication with the metal IP telephone terminal to be investigated may be disconnected.

In the telephone number investigation method according to the present invention, when the response message is code 410 Gone, it is determined that the metal IP telephone terminal to be investigated has been relocated and the telephone number is vacant, and the message is sent as relocation guidance. The telephone number information of the transfer destination of the metal IP telephone terminal to be investigated may be obtained by converting the voice data sent to text data into text data.

Further, the telephone number investigation program according to the present invention can be used to check a plurality of metal IP telephone terminals connected to the originating fixed IMS network and a plurality of metal IP telephone terminals connected to the destination fixed IMS network. A computer connected to at least one of the terminals via the originating fixed IMS network adds an SDP parameter to an INVITE request for the metal IP telephone terminal to be investigated, and transmits the INVITE request to the originating fixed IMS network. a process of receiving a response message via at least the originating fixed IMS network; and a process of determining the usage status of the telephone number of the metal IP telephone terminal to be investigated in accordance with the response message. At least the SDP parameters are set such that the network protocol is IPv4, the media type is audio only, the media transport protocol is RTP/AVP only, and the audio codec is G. 711 μ-law and G. 722.

The telephone number investigation program according to the present invention determines that the telephone number of the metal IP telephone terminal to be investigated exists when the response message is code 180 Ringing, code 200 OK, or code 486 Busy Here. , if the response message is code 404 Not Found, it is determined that the telephone number of the metal IP telephone terminal to be investigated is a missing number, and if the response message is code 410 Gone, the telephone number of the metal IP telephone terminal to be investigated is determined to be missing. The metal IP telephone terminal may be relocated and the telephone number may be determined to be unused.

The telephone number investigation program according to the present invention determines that the telephone number of the metal IP telephone terminal to be investigated exists when the response message is code 180 Ringing, and sends a CANCEL request to the originating fixed IMS network. By transmitting this, the ringing of the call bell of the metal IP telephone terminal to be investigated may be stopped.

The telephone number investigation program according to the present invention determines that the telephone number of the metal IP telephone terminal to be investigated exists when the response message is code 200 OK, and sends a BYE request to the originating fixed IMS network. By transmitting this, communication with the metal IP telephone terminal to be investigated may be disconnected.

When the response message is code 410 Gone, the telephone number investigation program according to the present invention determines that the metal IP telephone terminal to be investigated has been relocated and the telephone number is vacant, and sends the message as relocation guidance. The telephone number information of the transfer destination of the metal IP telephone terminal to be investigated may be obtained by converting the voice data sent to text data into text data.

Further, the telephone number information providing system according to the present invention includes any one of the telephone number investigation devices described above and a user terminal, and the telephone number investigation device is configured to transmit information from the user terminal to the telephone number investigation device. When a request for providing telephone number investigation information regarding an IP telephone terminal is received, the usage status of the telephone number of the metal IP telephone terminal determined by the telephone number investigation determination unit is sent to the user terminal that received the request for providing telephone number investigation information. It is also possible to include a network interface section for transmitting data via an IP network.

According to one aspect of the present invention, it is possible to determine the usage status of a telephone number in an IMS network by using an IMS interconnection interface or the like for interconnection between carriers.

1 is a schematic diagram showing a network connection form of a telephone number investigation device according to an embodiment of the present invention; FIG. FIG. 2 is a diagram illustrating pattern 1 of the basic sequence of operations between the calling device, the calling fixed IMS network, and the metal accommodation device when a metal IP telephone terminal exists as the receiving device and is not busy; FIG. . FIG. 3 is a diagram illustrating pattern 2 of the basic sequence of operations between the calling side device, the calling side fixed IMS network, and the metal accommodation device when a metal IP telephone terminal exists as the called side device and is not busy. . FIG. 2 is a diagram illustrating a basic sequence of operations between a calling side device, a calling side fixed IMS network, and a metal accommodation device when a metal IP telephone terminal exists as a called side device and is busy. FIG. 2 is a diagram illustrating a basic sequence of operations between a calling side device, a calling side fixed IMS network, and a metal accommodation device when a called side device has an unused number. FIG. 2 is a diagram illustrating a basic sequence of operations when a metal IP telephone terminal as a device on the receiving side is relocated between the device on the calling side, the fixed IMS network on the calling side, and the metal accommodation device. FIG. 2 is a block diagram showing the configuration of the telephone number investigation device of FIG. 1. FIG. FIG. 2 is a diagram illustrating part 1 of an operation sequence when a metal IP telephone terminal to be investigated exists and is not busy. FIG. 7 is a diagram illustrating part 2 of the operation sequence when the metal IP telephone terminal to be investigated exists and is not busy. FIG. 3 is a diagram illustrating an operation sequence when a metal IP telephone terminal to be investigated exists and is busy. FIG. 3 is a diagram illustrating an operation sequence when the metal IP telephone terminal to be investigated is an unused number. FIG. 3 is a diagram illustrating an operation sequence when the metal IP telephone terminal to be investigated has an unused number (IPv4, G.711 μ-law only). FIG. 3 is a diagram illustrating an operation sequence when a metal IP telephone terminal to be investigated has been relocated. FIG. 2 is a diagram illustrating an arrangement of methods for investigating the usage status of telephone numbers of metal IP telephone terminals. 1 is a system configuration diagram of a telephone number information providing system according to an embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Network connection type)
FIG. 1 is a schematic diagram showing a network connection form of a telephone number investigation device 10 according to an embodiment, which is an example of a specific configuration of the telephone number investigation device according to the present invention. The telephone number investigation device 10 is connected to the originating fixed IMS network 20 via a home gateway (HGW) 19.

A metal IP telephone terminal 60a to be investigated is connected to the telephone number investigation device 10 according to the embodiment via the originating fixed IMS network 20 (specifically, for example, an NGN network), and the terminating fixed IMS network 20 is connected to the telephone number investigation device 10 according to the embodiment. The metal IP phone terminal 60b to be investigated, which is connected to the IMS network 30 (specifically, for example, NGN network, IP telephone network (VoIP: Voice over Internet Protocol)), is connected to the originating fixed IMS network 20 (specifically, For example, they are connected via an NGN network.

Metal IP telephone terminals 60a and 60b continue to use existing metal cables even after the core network of fixed telephones is migrated from PSTN to IP network, and are provided as receivers for fixed telephones connected to existing metal cables. A telephone terminal that is used In addition to existing metal cables, subscriber exchanges will continue to be used as metal accommodation equipment.

Note that there may be a plurality of metal IP telephone terminals to be investigated that are connected to the telephone number investigation device 10 via the originating fixed IMS network 20, and the metal IP telephone terminal 60a in the example shown in the figure is the originating fixed IMS network 20. It is represented as one of a plurality of metal IP telephone terminals connected to the IMS network 20. Further, there may be a plurality of metal IP telephone terminals to be investigated that are connected to the telephone number investigation device 10 via the originating fixed IMS network 20 and the terminating fixed IMS network 30. The telephone terminal 60b is represented as one of a plurality of metal IP telephone terminals connected to the destination fixed IMS network 30. In addition, in the description of the embodiment, when there is no need to distinguish between the metal IP telephone terminals 60a and 60b for each network (in other words, for each contracted carrier), they are simply referred to as "metal IP telephone terminal 60". do.

The originating fixed IMS network 20 includes a SIP server 20a, and the operation of the originating fixed IMS network 20 is managed and controlled by the SIP server 20a. Furthermore, the destination fixed IMS network 30 includes a SIP server 30a, and the operation of the destination fixed IMS network 30 is managed and controlled by the SIP server 30a.

The originating fixed IMS network 20 and the terminating fixed IMS network 30 are constructed for each communication carrier (in the example shown in FIG. 1, carrier A and carrier B), and each has SIP servers 20a and 30a that are managed and operated by each carrier. Metal IP telephone terminals 60a and 60b are connected to each network (in other words, to each contracted carrier) through the network. Note that from the perspective of the originating fixed IMS network 20 in the example shown in the figure, there may be a plurality of terminating fixed IMS networks, and the terminating fixed IMS network 30 in the example shown in the figure is one of the plurality of terminating fixed IMS networks. It is represented as one.

The originating side fixed IMS network 20 and the destination side fixed IMS network 30 are compatible with the IP (Internet Protocol) v4 network protocol (in other words, Internet Protocol, IP version) regarding SDP (Session Description Protocol) parameters. , the media type corresponds to audio, the media transport protocol corresponds to RTP/AVP, and the audio codec corresponds to G. 711 μ-law compatible.

As a fixed telephone with a 0AB-J type telephone number, the metal IP telephone terminal 60a is connected to the originating fixed IMS network 20, which is the originating side network, and the terminating fixed IMS network 30, which is the terminating side network. Assume that a metal IP telephone terminal 60b is used.

In the configuration shown in FIG. 1, the phone number investigation device 10 on the calling side dials the phone number of the metal IP phone terminal 60a connected to the calling side fixed IMS network 20 as the phone number of the phone terminal on the called side. As a result, routing is executed in the order of the BGCF (Breakout Gateway Control Function) 22 of the fixed IMS network 20 on the calling side, the metal accommodation device 41, and the metal IP telephone terminal 60a on the called side.

Further, the telephone number investigation device 10 on the calling side dials the telephone number of the metal IP telephone terminal 60b connected to the fixed IMS network 30 on the called side as the telephone number of the called side telephone terminal. Routing is executed in the order of the IBCF (Inter-connection Border Control Function) 21 of the fixed IMS network 20 on the receiving side, the IBCF 31 and BGCF 32 on the fixed IMS network 30 on the receiving side, the metal accommodation device 51, and the metal IP telephone terminal 60b on the receiving side. .

At this time, a UNI connection is secured between the telephone number investigation device 10 and the originating fixed IMS network 20, and inter-operator interconnection between the originating fixed IMS network 20 and the terminating fixed IMS network 30 is ensured. The IMS interconnection is secured via the IMS interconnection interface (specifically, the IBCF 21 of the originating fixed IMS network 20 and the IBCF 31 of the terminating fixed IMS network 30), and the telephone number is investigated in accordance with the SIP signaling method. A specific SIP message (details will be described later) transmitted from the device 10 reaches the destination fixed IMS network 30.

In the example shown in Figure 1, II-NNI (Network-Network Interface), which is a common interface for interconnection between IMS carriers via IP-IP connection, is specified in the TTC standard JJ-90.30 ( TTC (Telecommunication Technology Committee; General Incorporated Association).

That is, in the description of the present invention, the originating side fixed IMS network 20 is an IMS network connected to the telephone number investigation device 10 via the home gateway 19, and the terminating side fixed IMS network 30 is an IMS network connected to the telephone number investigation device 10 via the home gateway 19. This is an IMS network connected to the fixed IMS network 20 via each IBCF.

Further, the originating fixed IMS network 20 and the metal accommodation device 41 connected to the originating fixed IMS network 20 are connected by ISUP (Integrated Services for digital network User Part) signaling system, and the terminating fixed IMS network 30 and The metal accommodation device 51 connected to the destination fixed IMS network 30 is also connected using the ISUP signaling method. Regarding the ISUP protocol, the technical specifications for SIP-TTC ISUP signaling interconnection are specified in the TTC standard JF-IETF-RFC3398. Further, technical information regarding encapsulation of ISUP information is specified in TTC specification TS-1025.

By the way, according to SIP, in order to perform real-time communication, it is necessary to negotiate between terminals regarding the encoding method of packets containing media information and addresses such as the destination of the packets. What is required for this negotiation is a description language called SDP (Session Description Protocol), which is defined in the TTC standard RFC4566.

In order to establish a session with SIP, the originating side first sends a request that describes media information in a SIP message, and the receiving side selects a compatible medium from among them and replies with a response to use for communication. Share media information between the calling and called parties.

Sending media information written in a SIP message to start a session is called an offer, and responding with media information that can be responded to is called an answer. This offer/answer model is defined in the TTC standard RFC3264. Furthermore, the SDP media negotiation procedure in IMS is specified in the TTC standard JJ-90.26.

The telephone number investigation device 10 in the example shown in FIG. 20a), the destination fixed IMS network 30 (including the SIP server 30a), and the metal accommodation device 51, the INVITE method SDP offer ( When transmitting the SDP parameter (referred to as "INVITE request"), a predetermined SDP parameter (referred to as "determination SDP parameter") is added (in other words, written) to the SDP parameter and transmitted.

The SDP parameters for determination that are added to the SDP parameters when transmitting the INVITE request are the network protocol (in other words, Internet protocol, IP version), media type, media transport protocol, and audio codec.

In response to an INVITE request, the metal IP telephone terminal 60 on the receiving side compares the SDP parameters included in the INVITE request with the SDP parameters that it can use, and determines the comparison result (i.e., matching of SDP parameters). /mismatch situation), a response with a predetermined code in the SIP session is returned as a response message.

Then, the telephone number investigation device 10 determines the existence/absence of the metal IP telephone terminal 60 on the called side (and, by extension, the existence/absence of the telephone number of the metal IP telephone terminal 60) based on the response of the received predetermined code. etc. to judge.

(basic sequence)
2 to 6 show how the INVITE method in IMS interconnection connects the calling device, the calling fixed IMS network 20, and the calling fixed IMS network 20 when the called device is a metal IP telephone terminal 60. The basic sequence of operations between the connected metal accommodation device 41 or between the originating device and the metal accommodation device 51 connected to the originating fixed IMS network 20 and the destination fixed IMS network 30 is explained below. FIG. Note that the basic sequence of operations between the calling device and the metal IP telephone terminal 60 according to the embodiment is not limited to the contents shown in FIGS. 2 to 6, and is based on the TTC standard JJ-90.30, Comply with the contents stipulated in the standard JJ-90.26, the TTC standard JF-IETF-RFC3398, the TTC standard TR-1088, the TTC standard JT-Q850, and the TTC specification TS-1025.

Between the calling side device and the called side device (specifically, a telephone terminal) connected to the calling side fixed IMS network 20, the BGCF 22 of the calling side fixed IMS network 20 and the calling side fixed IMS network 20 are connected. Communication is performed via the connected metal accommodating device 41. In addition, between the calling side device and the called side device (specifically, a telephone terminal) connected to the called side fixed IMS 30, the IBCF 21 of the calling side fixed IMS network 20 and the called side fixed IMS network 30 are connected. Communication is performed via the IBCF 31 and BGCF 32 and the metal accommodation device 51 connected to the destination fixed IMS network 30.

Here, there is a case between a device on the calling side and a device on the called side connected to the fixed IMS network 20 on the calling side, and a case between the device on the calling side and a device on the called side connected to the fixed IMS network 30 on the called side. In both cases, the content of communication between the originating fixed IMS network 20 and the metal accommodation device 41 connected to the originating fixed IMS network 20, and the originating fixed IMS network 20 and The content of communication with the metal accommodation device 51 connected to the destination fixed IMS network 30 is the same. For this reason, FIGS. 2 to 6 illustrate the connections between the originating side equipment and the originating fixed IMS network 20 (especially the SIP server 20a), and between the originating fixed IMS network 20 (especially the SIP server 20a) and the Accommodating devices (specifically, the metal accommodating device 41 connected to the originating fixed IMS network 20 and the metal accommodating device 51 connected to the destination fixed IMS network 30; these two metal accommodating devices are referred to as " Focusing on the content of communication between the sending device and the receiving device (specifically, the metal IP telephone terminal 60), The basic sequence of is shown.

(In real case/pattern 1)
FIG. 2 shows that a metal IP telephone terminal 60 exists as a device on the receiving side and a conversation is made between the calling side device, the calling side fixed IMS network 20, and the metal accommodation device 41/51 by the INVITE method in IMS interconnection. FIG. 3 is a diagram illustrating pattern 1 of a basic sequence of operations when a device on the originating side disconnects communication.

FIG. 2 shows, in particular, a function (specifically, Caller ID, Calling Number Identification; for example, Number Display (registered trademark)) that displays the telephone number of the caller (i.e., the other party) on the telephone terminal when receiving a call. FIG. 3 is a diagram illustrating a basic sequence in the case where the caller has set the phone number to be hidden and there is no setting to reject incoming calls.

The calling side device sends an INVITE request to the called side device via the calling side fixed IMS network 20 (F1), and in response to this, the metal accommodation device 41/51 is sent from the calling side fixed IMS network 20. Then, an IAM (Initial Address Message), which is a message conveying call establishment information within the network, is transmitted in the ISUP signaling system (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. A message ACM (Address Complete Message) is returned (F4), and in response, a code 183 Session Progress response indicating the progress of the call in the SIP session is sent from the originating fixed IMS network 20 to the originating device. A reply is sent (F5). Note that depending on the device on the receiving side, the ACM may not be returned, and therefore the code 183 Session Progress response may not be returned.

Furthermore, a CPG (Call Progress Message), which is a message indicating that in-channel information can be used in the ISUP signaling system, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 (F6), and in response to this, A code 180 Ringing response indicating that a ring tone is sounding in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F7).

At this time, the ringing bell of the device on the receiving side rings, and RBT (Ringing Back Tone) is transmitted from the metal accommodation device 41/51 to the device on the calling side as RTP (Real Time Transport Protocol).

Next, an ANM (Answer Message), which is a message indicating that the called party has answered the call in the ISUP signaling system, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 (F8). In response, a code 200 OK response indicating that the request (here, specifically, the INVITE request) was successfully processed in the SIP session is returned from the originating fixed IMS network 20 to the originating device ( F9).

In response, an ACK (Acknowledgment) response indicating an acknowledgment in the SIP session is returned from the originating device to the originating fixed IMS network 20 (F10), and the communication between the originating device and the terminating device is The session is established and the call begins.

Thereafter, (in the example shown in FIG. 2, when the calling device disconnects the communication), a BYE request is sent from the calling device to the calling fixed IMS network 20 in the SIP session (F11). ), and in response, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the originating fixed IMS network 20 to the metal accommodation device 41/51 in the ISUP signaling system (F12).

In contrast, (in the example shown in FIG. 2) a message is sent from the metal accommodation device 41/51 to the originating fixed IMS network 20 in ISUP signaling to confirm the termination of the call and to release resources related to the call. An RLC (Release Complete Message) is returned (F13), and in response, a request (here, specifically a BYE request) is sent from the originating fixed IMS network 20 to the originating device in the SIP session. A code 200 OK response indicating successful processing is returned (F14). This ends the session between the calling device and the called device, that is, the communication between the calling device and the called device is disconnected.

(In real case/pattern 2)
FIG. 3 shows that a metal IP telephone terminal 60 actually exists as a device on the receiving side and a conversation is made between the calling side device, the calling side fixed IMS network 20, and the metal accommodation device 41/51 by the INVITE method in IMS interconnection. FIG. 12 is a diagram illustrating pattern 2 of the basic sequence of operations when the device on the originating side disconnects the communication.

In particular, FIG. 3 shows a function (specifically, Caller ID, Calling Number Identification; for example, Number Display (registered trademark)) that displays the telephone number of the caller (i.e., the other party) on the telephone terminal when receiving a call. FIG. 2 is a diagram illustrating a basic sequence when a call is set to be rejected if the caller has set his or her phone number to be hidden.

The calling side device sends an INVITE request to the called side device via the calling side fixed IMS network 20 (F1), and in response to this, the metal accommodation device 41/51 is sent from the calling side fixed IMS network 20. Then, an IAM (Initial Address Message), which is a message conveying call establishment information within the network, is transmitted in the ISUP signaling system (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. A message ACM (Address Complete Message) is returned (F4), and in response, a code 183 Session Progress response indicating the progress of the call in the SIP session is sent from the originating fixed IMS network 20 to the originating device. A reply is sent (F5).

Furthermore, a CPG (Call Progress Message), which is a message indicating that in-channel information can be used in the ISUP signaling system, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 (F6), and in response to this, A code 180 Ringing response indicating that a ring tone is sounding in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F7). Note that depending on the device on the receiving side, the CPG is not returned, and therefore the code 180 Ringing response may not be returned.

At this time, the ringing bell of the device on the receiving side does not ring (because the incoming call is actually rejected), and the call is sent from the metal accommodation device 41/51 to the device on the calling side as RTP (Real Time Transport Protocol). , RBT (Ringing Back Tone) is transmitted, and then guidance is transmitted informing that the call is being rejected because the caller has set his/her phone number to be anonymous.

Next, an ANM (Answer Message), which is a message indicating that the called party has responded to the call, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F8) (however, In response, the request (here, specifically, the INVITE request) is normally processed from the originating fixed IMS network 20 to the originating device in the SIP session. A code 200 OK response indicating that the process has been completed is returned (F9).

In response, an ACK response indicating an acknowledgment in the SIP session is returned from the originating device to the originating fixed IMS network 20 (F10).

Thereafter, (in the example shown in FIG. 3, when the calling device disconnects communication), a BYE request is sent from the calling device to the calling fixed IMS network 20, indicating that the SIP session is to be terminated (F11 ), and in response, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the originating fixed IMS network 20 to the metal accommodation device 41/51 in the ISUP signaling system (F12).

In contrast, (in the example shown in FIG. 3) a message is sent from the metal accommodation device 41/51 to the originating fixed IMS network 20 in ISUP signaling to confirm the termination of the call and to release resources related to the call. An RLC (Release Complete Message) is returned (F13), and in response to this, a request (here, specifically a BYE request) is sent from the originating fixed IMS network 20 to the originating device in the SIP session. A code 200 OK response indicating successful processing is returned (F14). This ends the session between the calling device and the called device, that is, the communication between the calling device and the called device is disconnected.

(If busy)
FIG. 4 shows an example in which a metal IP telephone terminal 60 exists as a device on the receiving side and a conversation occurs between the calling device, the calling fixed IMS network 20, and the metal accommodation device 41/51 using the INVITE method in IMS interconnection. FIG. 3 is a diagram illustrating a basic sequence of operations when the vehicle is in the middle of the day.

The calling side device sends an INVITE request to the called side device via the calling side fixed IMS network 20 (F1), and in response to this, the metal accommodation device 41/51 is sent from the calling side fixed IMS network 20. Then, an IAM (Initial Address Message), which is a message conveying call establishment information within the network, is transmitted in the ISUP signaling system (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. A message ACM (Address Complete Message) is returned (F4), and in response, a code 183 Session Progress response indicating the progress of the call in the SIP session is sent from the originating fixed IMS network 20 to the originating device. A reply is sent (F5). Note that the ACM may not be returned by generating the next F6 message REL (Release Message), and therefore the code 183 Session Progress response may not be returned.

Furthermore, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F6). At this time, the cause value of the message REL is code 17 (ie, User busy), which means that the called party is busy.

In response to the transmission (F6) of the message REL (the cause value is code 17), the originating fixed IMS network 20 sends the originating device the media resources requested by the originating party in the SIP session. A code 486 Busy Here response indicating that the session cannot be started due to a busy state is returned (F7).

In response, an ACK response indicating an acknowledgment in the SIP session is returned from the originating device to the originating fixed IMS network 20 (F8), and in response, the originating fixed IMS network 20 sends an ACK response to the originating fixed IMS network 20. 41/51, an RLC (Release Complete Message), which is a message indicating confirmation of the end of the call and release of resources related to the call, is returned in the ISUP signaling system (F9). This ends the session related to the INVITE request from the calling device.

(In case of missing number)
FIG. 5 shows that the called device (in other words, the telephone number) is a missing number between the calling device, the calling fixed IMS network 20, and the metal accommodation device 41/51 due to the INVITE method in IMS interconnection. FIG.

The calling side device sends an INVITE request to the called side device via the calling side fixed IMS network 20 (F1), and in response to this, the metal accommodation device 41/51 is sent from the calling side fixed IMS network 20. Then, an IAM (Initial Address Message), which is a message conveying call establishment information within the network, is transmitted in the ISUP signaling system (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F3).

Further, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F4). At this time, the cause value of the message REL is code 1 (i.e., Unallocated number), which means that the telephone number is to which no device is assigned (i.e., an unallocated number).

In response to the transmission (F4) of the message REL (the cause value is code 1), the originating fixed IMS network 20 sends the message to the originating device, indicating that the media resource requested by the originating party in the SIP session is not found. A code 404 Not Found response indicating that there is no found is returned (F5).

In response, an ACK response indicating an acknowledgment in the SIP session is returned from the originating device to the originating fixed IMS network 20 (F6), and in response, the originating fixed IMS network 20 sends an ACK response to the originating fixed IMS network 20. 41/51, an RLC (Release Complete Message), which is a message indicating confirmation of the end of the call and release of resources related to the call, is returned in the ISUP signaling system (F7). This ends the session related to the INVITE request from the calling device.

(In case of relocation)
FIG. 6 shows the transfer of the metal IP telephone terminal 60 as the called device between the calling device, the calling fixed IMS network 20, and the metal accommodation device 41/51 using the INVITE method in IMS interconnection. FIG. 2 is a diagram illustrating a basic sequence of operations when

The device on the calling side sends an INVITE request to the device on the receiving side via the calling side fixed IMS network 20 (F1), and in response, the metal accommodation device 41/51 is sent from the calling side fixed IMS network 20. Then, an IAM (Initial Address Message), which is a message conveying call establishment information within the network, is transmitted in the ISUP signaling system (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the originating device (F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. A message ACM (Address Complete Message) is returned (F4), and in response, a code 183 Session Progress response indicating the progress of the call in the SIP session is sent from the originating fixed IMS network 20 to the originating device. A reply is sent (F5).

Furthermore, from the metal accommodation device 41/51 to the calling device, transfer guidance is sent as RTP (Real Time Transport Protocol) informing that the telephone number of the receiving device has been changed, as well as the changed telephone number (in other words). and relocation guidance informing that the called party's device has been relocated (relocation guidance and the relocation destination phone number) will be sent. Note that the time length of the relocation guidance is, for example, about 60 to 80 seconds.

After the relocation guidance ends, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F6). At this time, the cause value of the message REL is code 22 (ie, number changed (w/o diagnostic)), which means that the called party's number has been changed.

In response to the transmission (F6) of the message REL (cause value is code 22), the originating fixed IMS network 20 sends the media resource previously requested by the originating party in the SIP session to the originating party's device. A code 410 Gone response indicating that the file existed but does not currently exist is returned (F7).

In response, an ACK response indicating an acknowledgment in the SIP session is returned from the originating device to the originating fixed IMS network 20 (F8), and in response, the originating fixed IMS network 20 sends an ACK response to the originating fixed IMS network 20. 41/51, an RLC (Release Complete Message), which is a message indicating confirmation of the end of the call and release of resources related to the call, is returned in the ISUP signaling system (F9). This ends the session related to the INVITE request from the calling device.

(Telephone number investigation device)
FIG. 7 is a block diagram showing the configuration of the telephone number investigation device 10 according to the embodiment.

The telephone number investigation device 10 according to the embodiment is connected to a plurality of metal IP telephone terminals (60a) connected to the originating fixed IMS network 20 via the originating fixed IMS network 20, and also connected to the terminating fixed IMS network 20. The SDP parameter is attached to the INVITE request to the metal IP telephone terminal 60 that is connected to the fixed IMS network 30 via the originating fixed IMS network 20 and is the subject of investigation. An INVITE request is sent to the originating fixed IMS network 20 (toward the metal IP telephone terminal 60 to be investigated), and a response message is received via at least the originating fixed IMS network 20, and the investigation target is determined according to the response message. The usage status of the telephone number of the metal IP telephone terminal 60 is determined.

The telephone number investigation device 10 includes a network interface section 11, a message exchange control section 12, a telephone number investigation determination section 13, a telephone number history generation section 14, and a telephone number history database (DB) 15.

The network interface unit 11 serves as a communication interface for the telephone number investigation device 10 to communicate in accordance with the SIP protocol.

The message exchange control unit 12 transmits an INVITE request including SDP parameters for determination to the metal IP telephone terminal 60 to be investigated, and sends a message (for example, a predetermined code response).

The telephone number investigation determination unit 13 determines whether the metal IP telephone terminal 60 on the called side exists or not, depending on the message received via the message exchange control unit 12 (for example, a response with a predetermined code in an SIP session). Furthermore, the validity of the telephone number of the metal IP telephone terminal 60 to be investigated (in other words, the usage status of the telephone number) is determined.

The telephone number history generation unit 14 constructs a telephone number history database 15 by adding a time stamp indicating the date and time of determination to each of the determination results in the telephone number investigation determination unit 13 and recording them in chronological order on a recording medium. do.

Although the data structure (in other words, recorded data items) of the telephone number history database 15 is not limited to a specific structure or item, the telephone number history information stored in the telephone number history database 15 is (In other words, each time an INVITE request is sent), the "telephone number" to be investigated, the "error code" returned via the originating fixed IMS network 20, and the "investigation date" (in other words, the time stamp), "existence/absent number/relocation determination result", and "other layer information" regarding the layer returned via the originating fixed IMS network 20.

In addition to the data items described above, the telephone number history information stored in the telephone number history database 15 also includes, for example, the type of metal IP telephone terminal 60 to be investigated, the relocation destination or contact telephone number found during the investigation, etc. Even if it includes a certain "new subscriber number", "corporate name/individual name" that owns the phone number, "attribute information" such as address and age, "map link information", and "credit information" for credit evaluation. good.

For example, when the telephone number investigation device 10 executes a telephone number usage investigation regarding the telephone number "03-XXXX-XXXX", the telephone number history database 15 stores information for each determination made by the telephone number investigation determination unit 13. , investigation information is sequentially recorded and accumulated as telephone number history information.

Note that the telephone number history database 15 may be implemented in a large-capacity recording medium such as a semiconductor memory, a hard disk, or an optical memory such as a DVD (Digital Versatile Disc).

The telephone number investigation device 10 is a microprocessor having a built-in memory (not shown) in which a predetermined program (including the telephone number investigation program according to the embodiment) is recorded, or a microprocessor in which a predetermined program is recorded. The microprocessor includes an externally attached memory (not shown), and an LSI (Large Scale Integration) that performs peripheral control including communication control.

Then, the microprocessor sequentially reads out and executes a predetermined program (including a telephone number investigation program according to the embodiment) recorded in a memory (not shown), so that the network interface unit 11 and the message An exchange control section 12, a telephone number investigation determination section 13, and a telephone number history generation section 14 are each configured to realize a predetermined function as the telephone number investigation device 10.

(Telephone number research method)
As an example of a specific configuration aspect of the telephone number investigation method according to the present invention, the telephone number investigation method according to the embodiment includes a plurality of metal IP telephone terminals ( 60a) via the originating fixed IMS network 20, and is also connected to a plurality of metal IP telephone terminals (60b) connected to the terminating fixed IMS network 30 via the originating fixed IMS network 20. This method uses a computer (specifically, the telephone number investigation device 10) to investigate the usage status of the telephone number of a metal IP telephone terminal 60 to be investigated. A step of adding an SDP parameter to the request and transmitting an INVITE request to the originating fixed IMS network 20 (towards the metal IP telephone terminal 60 to be investigated), and sending a response message at least via the originating fixed IMS network 20. and a step of determining the usage status of the telephone number of the metal IP telephone terminal 60 to be investigated according to the response message. The transport protocol is RTP/AVP only, and the audio codec is G. 711 μ-law and G. It is said to be 722.

The telephone number investigation method described below can be carried out by causing a computer (specifically, the telephone number investigation device 10) to execute a telephone number investigation program and perform each corresponding procedure according to the program. .

Among the SDP parameters for determination, IPv4 is described and offered (in other words, used) for the network protocol (in other words, Internet protocol, IP version), and other SDP parameters for determination are provided as SDP parameters. It is described as below. The following description regarding SDP parameters for determination will be referred to as "SDP for metal IP telephones."
○Media type: audio only ○Media transport protocol: RTP/AVP only ○Audio codec: G. 711 μ-law and G. 722

(Existence determination/Part 1)
FIG. 8 shows a case where IPv4 is described for the network protocol as the SDP parameter, and the above-mentioned SDP for metal IP telephone is described and offered for the determination SDP parameter, and the metal IP telephone terminal 60 to be investigated exists and is available. FIG. 4 is a diagram illustrating part 1 of the operation sequence when the device is not in use.

In particular, FIG. 8 shows a function (specifically, Caller ID, Calling Number Identification; for example, Number Display (registered trademark)) that displays the telephone number of the caller (i.e., the other party) on the telephone terminal when receiving a call. FIG. 2 is a diagram illustrating an operation sequence in a case where the caller has set the phone number not to be notified and there is no setting to reject incoming calls.

The message exchange control unit 12 of the telephone number investigation device 10 transmits an INVITE request to the metal IP telephone terminal 60 to be investigated via the originating fixed IMS network 20 (F1). At this time, the above-mentioned SDP for metal IP telephone is described as the SDP parameter for determination (the network protocol is IPv4) as the SDP parameter included in the INVITE request.

Upon receiving the INVITE request (F1), an IAM (Initial Address Message) message is sent from the originating fixed IMS network 20 to the metal accommodation device 41/51, which is a message that transmits call establishment information within the network in the ISUP signaling system. is transmitted (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. An ACM (Address Complete Message) message is returned (F4), and in response to this, an SIP A code 183 Session Progress response indicating the progress of the call in the session is returned (F5). Note that depending on the device on the receiving side (that is, the metal IP telephone terminal 60 to be investigated), the ACM may not be returned, and therefore the code 183 Session Progress response may not be returned.

Furthermore, a CPG (Call Progress Message), which is a message indicating that in-channel information can be used in the ISUP signaling system, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 (F6), and in response to this, A code 180 Ringing response indicating that a ring tone is sounding in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12) (F7 ). At this time, the metal IP telephone terminal 60 to be investigated on the called side rings a ringing bell.

In this case, the telephone number investigation determination unit 13 of the telephone number investigation device 10 determines whether the metal IP telephone terminal 60 to be investigated on the called side exists and is not busy (that is, the telephone number of the metal IP telephone terminal 60 to be investigated is exists).

Following F6 and F7 described above, RBT (Ringing Back Tone) is sent from the metal accommodation device 41/51 to the telephone number investigation device 10 as RTP (Real Time Transport Protocol).

Furthermore, the message exchange control unit 12 of the telephone number investigation device 10 transmits a CANCEL request, which is an instruction to terminate the session in the SIP session, to the originating fixed IMS network 20 (F8).

That is, upon receiving the code 180 response, the message exchange control unit 12 of the telephone number investigation device 10 immediately (or more specifically For example, at approximately the same time as the code 180 response is received, a CANCEL request is sent. As a result, the ringing of the ringing bell of the metal IP telephone terminal 60 to be investigated on the called side stops in an extremely short period of time.

In response to the transmission of the CANCEL request (F8), a REL (Release Message), which is a message indicating the end of the call in the ISUP signaling system, is transmitted from the originating fixed IMS network 20 to the metal accommodation device 41/51 (F9). ).

In contrast, an RLC (Release Complete Message) is sent from the metal accommodation device 41/51 to the originating fixed IMS network 20, which is a message indicating confirmation of the end of the call and release of resources related to the call in the ISUP signaling system. is returned (F10), and in response, a request (here, specifically, A code 200 OK response indicating that the CANCEL request has been successfully processed is returned (F11), and a code 487 Request Terminated response indicating the termination of the session in the SIP session is returned (F12).

In response, the message exchange control unit 12 of the telephone number investigation device 10 returns an ACK response indicating an acknowledgment in the SIP session to the originating fixed IMS network 20 (F13). As a result, the session between the telephone number investigation device 10 and the metal IP telephone terminal 60 to be investigated on the called side ends. Communication between the two is disconnected.

(Existence determination/Part 2)
FIG. 9 shows a case where IPv4 is described for the network protocol as the SDP parameter, and the above-mentioned SDP for metal IP telephone is described and offered for the SDP parameter for determination, and the metal IP telephone terminal 60 to be investigated exists and is available. FIG. 7 is a diagram illustrating part 2 of the operation sequence when the device is not in use.

In particular, FIG. 9 shows a function (specifically, Caller ID, Calling Number Identification; for example, Number Display (registered trademark)) that displays the telephone number of the caller (i.e., the other party) on the telephone terminal when receiving a call. FIG. 2 is a diagram illustrating an operation sequence when the caller is set to reject incoming calls if the caller has set his or her phone number not to be notified.

The message exchange control unit 12 of the telephone number investigation device 10 transmits an INVITE request to the metal IP telephone terminal 60 to be investigated via the originating fixed IMS network 20 (F1). At this time, the above-mentioned SDP for metal IP telephone is described as the SDP parameter for determination (the network protocol is IPv4) as the SDP parameter included in the INVITE request.

Upon receiving the INVITE request (F1), an IAM (Initial Address Message) message is sent from the originating fixed IMS network 20 to the metal accommodation device 41/51, which is a message that transmits call establishment information within the network in the ISUP signaling system. is transmitted (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. An ACM (Address Complete Message) message is returned (F4), and in response to this, an SIP A code 183 Session Progress response indicating the progress of the call in the session is returned (F5).

Furthermore, a CPG (Call Progress Message), which is a message indicating that in-channel information can be used in the ISUP signaling system, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 (F6), and in response to this, A code 180 Ringing response indicating that a ring tone is sounding in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12) (F7 ). Note that depending on the device on the receiving side (that is, the metal IP telephone terminal 60 to be investigated), the CPG may not be returned, and therefore the code 180 Ringing response may not be returned.

At this time, the ringing bell of the metal IP phone terminal 60 to be investigated on the called side does not ring (because the incoming call is actually rejected), and the call is sent from the metal accommodation device 41/51 to the phone number investigation device 10. , an RBT (Ringing Back Tone) is sent as RTP (Real Time Transport Protocol), followed by a guidance message informing you that the call is being rejected because the caller has set their phone number to be anonymous. Sent.

Next, an ANM (Answer Message), which is a message indicating that the called party has responded to the call, is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F8) (however, In response, the originating fixed IMS network 20 sends a request (here Specifically, a code 200 OK response indicating that the INVITE request has been successfully processed is returned (F9).

In this case, the telephone number investigation determination unit 13 of the telephone number investigation device 10 determines whether the metal IP telephone terminal 60 to be investigated on the called side exists and is not busy (that is, the telephone number of the metal IP telephone terminal 60 to be investigated is exists). Note that the metal IP telephone terminal 60 to be investigated on the called side does not ring a ringing bell.

Subsequently, the message exchange control unit 12 of the telephone number investigation device 10 transmits an ACK response indicating an acknowledgment in the SIP session to the originating fixed IMS network 20 (F10), and terminates the session in the SIP session. A BYE request indicating this is transmitted (F11).

That is, upon receiving the code 200 response, the message exchange control unit 12 of the telephone number investigation device 10 transmits a BYE request in order to disconnect communication with the metal IP telephone terminal 60 to be investigated on the called side. .

In response to the transmission of the BYE request (F11), a REL (Release Message), which is a message indicating the end of the call in the ISUP signaling system, is transmitted from the originating fixed IMS network 20 to the metal accommodation device 41/51 (F12). ).

In contrast, an RLC (Release Complete Message) is sent from the metal accommodation device 41/51 to the originating fixed IMS network 20, which is a message indicating confirmation of the end of the call and release of resources related to the call in the ISUP signaling system. is returned (F13), and in response, a request (here specifically, A code 200 OK response indicating that the BYE request) has been successfully processed is returned (F14). As a result, the session between the telephone number investigation device 10 and the metal IP telephone terminal 60 to be investigated on the called side ends. Communication between the two is disconnected.

(Existence determination/If busy)
FIG. 10 shows a case where IPv4 is described for the network protocol as the SDP parameter, and the above-mentioned SDP for metal IP telephone is described and offered for the determination SDP parameter, and the metal IP telephone terminal 60 to be investigated actually exists and is available. FIG. 4 is a diagram illustrating an operation sequence when the camera is in the middle of the operation.

The message exchange control unit 12 of the telephone number investigation device 10 transmits an INVITE request to the metal IP telephone terminal 60 to be investigated via the originating fixed IMS network 20 (F1). At this time, the above-mentioned SDP for metal IP telephone is described as the SDP parameter for determination (the network protocol is IPv4) as the SDP parameter included in the INVITE request.

Upon receiving the INVITE request (F1), an IAM (Initial Address Message) message is sent from the originating fixed IMS network 20 to the metal accommodation device 41/51, which is a message that transmits call establishment information within the network in the ISUP signaling system. is transmitted (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. An ACM (Address Complete Message) message is returned (F4), and in response to this, an SIP A code 183 Session Progress response indicating the progress of the call in the session is returned (F5). Note that the ACM may not be returned by generating the next F6 message REL (Release Message), and therefore the code 183 Session Progress response may not be returned.

Furthermore, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F6). At this time, the cause value of the message REL is code 17 (ie, User busy), which means that the called party is busy.

In response to the transmission (F6) of the message REL (the reason display value is code 17), the message is sent from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). , a code 486 Busy Here response indicating that the media resource requested by the originator in the SIP session is currently busy and the session cannot be started is returned (F7).

In this case, the telephone number investigation determination unit 13 of the telephone number investigation device 10 determines that the metal IP telephone terminal 60 to be investigated on the called side exists and is busy (that is, the telephone number of the metal IP telephone terminal 60 to be investigated is The number actually exists).

Next, the message exchange control unit 12 of the telephone number investigation device 10 returns an ACK response indicating an acknowledgment in the SIP session to the originating fixed IMS network 20 (F8). An RLC (Release Complete Message), which is a message indicating confirmation of the end of the call and release of resources related to the call, is returned from the IMS network 20 to the metal accommodation device 41/51 in the ISUP signaling system (F9). As a result, the session related to the INVITE request from the telephone number research device 10 ends.

(missing number determination)
FIG. 11 shows a case where IPv4 is described for the network protocol as the SDP parameter, and the above SDP for metal IP telephone is described and offered for the determination SDP parameter, and the metal IP telephone terminal 60 to be investigated (in other words, the telephone FIG. 4 is a diagram illustrating an operation sequence when a number) is a missing number.

The message exchange control unit 12 of the telephone number investigation device 10 transmits an INVITE request to the metal IP telephone terminal 60 to be investigated via the originating fixed IMS network 20 (F1). At this time, the above-mentioned SDP for metal IP telephone is described as the SDP parameter for determination (the network protocol is IPv4) as the SDP parameter included in the INVITE request.

Upon receiving the INVITE request (F1), an IAM (Initial Address Message) message is sent from the originating fixed IMS network 20 to the metal accommodation device 41/51, which is a message that transmits call establishment information within the network in the ISUP signaling system. is transmitted (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). F3).

Further, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F4). At this time, the cause value of the message REL is code 1 (i.e., Unallocated number), which means that the telephone number is to which no device is assigned (i.e., an unallocated number).

Upon receiving the message REL (the reason display value is code 1) (F4), the caller's fixed IMS network 20 sends the message to the telephone number investigation device 10 (specifically, the message exchange control unit 12). , a code 404 Not Found response indicating that the media resource requested by the caller in the SIP session is not found is returned (F5).

In this case, the telephone number investigation determination unit 13 of the telephone number investigation device 10 determines that the metal IP telephone terminal 60 to be investigated on the called side is a missing number (that is, the telephone number of the metal IP telephone terminal 60 to be investigated is a missing number). It is determined that there is a Note that missing numbers include cases where the metal IP telephone terminal 60 to be investigated on the called side has been canceled.

Next, the message exchange control unit 12 of the telephone number investigation device 10 returns an ACK response indicating an acknowledgment in the SIP session to the originating fixed IMS network 20 (F6). An RLC (Release Complete Message), which is a message indicating confirmation of the end of the call and release of resources related to the call, is returned from the IMS network 20 to the metal accommodation device 41/51 in the ISUP signaling system (F7). As a result, the session related to the INVITE request from the telephone number research device 10 ends.

Here, FIG. 12 shows a case where IPv4 is described and offered for the network protocol (in other words, Internet protocol, IP version) among the SDP parameters for determination, and the voice About codecsG. 711 μ-law only (that is, does not include G.722) is a diagram illustrating an operation sequence when the metal IP telephone terminal 60 to be investigated (in other words, the telephone number) is a missing number. .

In this case, upon receiving an INVITE request (F1) from the telephone number investigation device 10 (specifically, the message exchange control unit 12), the caller's fixed IMS network 20 sends an INVITE request to the metal accommodation device 41/51. A message IAM (Initial Address Message) is sent (F2), and then a code 100 Trying response is sent back from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). (F3).

In addition, upon receiving the message ACM reply (F4) from the metal accommodation device 41/51, the code 183 is sent from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). A Session Progress response is returned (F5).

Subsequently, a PRACK (Provisional Response Acknowledgment) request, which is a provisional response confirmation in the SIP session, is transmitted from the telephone number investigation device 10 (specifically, the message exchange control unit 12) to the originating fixed IMS network 20. F6), in response, the originating fixed IMS network 20 sends a request (here, specifically, A code 200 OK response indicating that the PRACK request (PRACK request) has been successfully processed is returned (F7).

At this time, the code 200 OK response (F7) sent back from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12) passes through the home gateway 19. Therefore, the telephone number investigation device 10 cannot be reached. Therefore, the operation of transmitting a BYE request when the message exchange control unit 12 of the telephone number research device 10 receives the code 200 response as described in FIG. 9 does not occur.

Next, from the metal accommodation device 41/51 to the telephone number investigation device 10, as RTP (Real Time Transport Protocol), the device on the receiving side (here, specifically, the metal IP telephone terminal 60 to be investigated; in other words An out-of-number guidance will be sent to inform you that the number (and phone number) is out of order.

After the missing number guidance ends, a message RLC is returned from the metal accommodation device 41/51 to the originating fixed IMS network 20 (F8), and in response, the originating fixed IMS network 20 sends a telephone number investigation device 10 (specific Specifically, a code 487 Request Terminated response is returned to the message exchange control unit 12) (F9).

In response to this, an ACK response is returned from the telephone number investigation device 10 (specifically, the message exchange control unit 12) to the originating fixed IMS network 20 (F10).

At this time, the code 487 Request Terminated response is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12) (F9), so that the metal IP to be investigated is returned. It is also conceivable to determine that the telephone terminal 60 (in other words, the telephone number) is an unused number.

However, in the operation shown in FIG. 12, the message RLC is returned (F8) and the code 487 Request Terminated response is returned (F9) after the transmission of the missing number guidance is completed. Therefore, it takes about 32 seconds from sending the INVITE request (F1) to returning the ACK response (F10).

In contrast, in the operation shown in FIG. 11, it takes only about 0.4 seconds from sending the INVITE request (F1) to returning the ACK response (F6) and returning the message RLC (F7).

Therefore, as shown in FIG. 12, among the SDP parameters for determination, G. 711 μ-law after the missing number guidance, rather than determining the missing number based on the reply of the code 487 Request Terminated response, as shown in FIG. 11, G. 711 μ-law and G. It is preferable to perform the missing number determination by replying the code 404 Not Found response without going through the missing number guidance as 722, since this can significantly shorten the time.

Therefore, if IPv4 is described and offered for the network protocol among the SDP parameters for determination as an SDP parameter, G. 711 μ-law plus G.711 μ-law. It is appropriate to write G.722 (ie, offer G.711 μ-law and G.722 simultaneously).

(Relocation determination)
FIG. 13 shows a case where IPv4 is described for the network protocol as the SDP parameter, and the above SDP for metal IP telephone is described and offered for the determination SDP parameter, and the metal IP telephone terminal 60 to be investigated has been relocated. FIG.

The message exchange control unit 12 of the telephone number investigation device 10 transmits an INVITE request to the metal IP telephone terminal 60 to be investigated via the originating fixed IMS network 20 (F1). At this time, the above-mentioned SDP for metal IP telephone is described as the SDP parameter for determination (the network protocol is IPv4) as the SDP parameter included in the INVITE request.

Upon receiving the INVITE request (F1), an IAM (Initial Address Message) message is sent from the originating fixed IMS network 20 to the metal accommodation device 41/51, which is a message that transmits call establishment information within the network in the ISUP signaling system. is transmitted (F2).

Subsequently, a code 100 Trying response indicating that the request has been accepted in the SIP session is returned from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). F3).

Also, it indicates that a call has arrived from the metal accommodation device 41/51 to the originating fixed IMS network 20 at the time of establishment of a call in the ISUP signaling system, and a communication line has been established between the caller and the called party. An ACM (Address Complete Message) message is returned (F4), and in response to this, an SIP A code 183 Session Progress response indicating the progress of the call in the session is returned (F5).

Further, from the metal accommodation device 41/51 to the telephone number investigation device 10, transfer guidance is sent as RTP (Real Time Transport Protocol) informing that the telephone number of the called device has been changed and the telephone number after the change. (In other words, relocation guidance and the telephone number of the relocation destination informing that the called device has been relocated) are transmitted. Note that the time length of the relocation guidance is, for example, about 60 to 80 seconds.

After the relocation guidance ends, a REL (Release Message), which is a message indicating the end of the call, is transmitted from the metal accommodation device 41/51 to the originating fixed IMS network 20 in the ISUP signaling system (F6). At this time, the cause value of the message REL is code 22 (ie, number changed (w/o diagnostic)), which means that the called party's number has been changed.

In response to the transmission (F6) of the message REL (the reason display value is code 22), the message is sent from the originating fixed IMS network 20 to the telephone number investigation device 10 (specifically, the message exchange control unit 12). , a code 410 Gone response is returned (F7) indicating that the media resource requested by the originator in the SIP session previously existed but does not currently exist.

In this case, the telephone number investigation determination unit 13 of the telephone number investigation device 10 determines that the metal IP telephone terminal 60 to be investigated on the called side has been relocated (that is, the telephone number of the metal IP telephone terminal 60 to be investigated is a vacant number. ).

When (some kind of) guidance is sent, the telephone number investigation device 10 records (in other words, packet captures) the guidance and retains it as audio data, and returns a code 410 Gone response following the guidance. In such a case, the recorded and retained voice data should be saved in a memory or a storage device (none of which are shown) as voice data including the telephone number of the destination of the metal IP telephone terminal 60 to be investigated on the called side. You can.

The telephone number investigation device 10 further converts the voice data stored as voice data including the telephone number of the transfer destination of the metal IP telephone terminal 60 to be investigated on the called side into text (that is, Speech to Text), and converts the voice data to text. The subsequent text data may be stored in a memory or a storage device (none of which is shown) as text data including the telephone number of the transfer destination of the metal IP telephone terminal 60 to be investigated on the called side.

That is, the telephone number investigation device 10 utilizes the relocation guidance, specifically, converts the voice data transmitted as the relocation guidance into text data, and sends it to the metal IP telephone terminal 60 to be investigated on the called party. Alternatively, the telephone number information of the transfer destination may be obtained. In this case, the telephone number research device 10 may further include a voice converter (not shown).

Next, the message exchange control unit 12 of the telephone number investigation device 10 returns an ACK response indicating an acknowledgment in the SIP session to the originating fixed IMS network 20 (F8). An RLC (Release Complete Message), which is a message indicating confirmation of the end of the call and release of resources related to the call, is returned from the IMS network 20 to the metal accommodation device 41/51 in the ISUP signaling system (F9). As a result, the session related to the INVITE request from the telephone number research device 10 ends.

(Telephone number research method)
FIG. 14 shows the usage status (specifically, the actual (vacant, vacant, This section outlines methods for investigating busy numbers (busy numbers), missing numbers, and relocations.

Regarding the usage status of the landline phone number, which is the 0AB-J number of the metal IP phone terminal 60 connected to the telecommunications carrier, among the SDP parameters, the network protocol (in other words, Internet protocol, IP version) is IPv4. and other SDP parameters by making an SDP offer (i.e., INVITE request) using SDP for metal IP telephones to determine whether the number is real (vacant, busy), abandoned, or transferred. can be accurately determined.

(Telephone number research program)
The telephone number investigation program according to the embodiment, which is an example of a specific configuration aspect of the telephone number investigation program according to the present invention, uses a plurality of metal IP telephone terminals ( 60a) via the originating fixed IMS network 20, and is also connected to a plurality of metal IP telephone terminals (60b) connected to the terminating fixed IMS network 30 via the originating fixed IMS network 20. This is a program installed in the telephone number research device 10 (see FIGS. 1 and 7).

The telephone number investigation program according to the embodiment is connected to a plurality of metal IP telephone terminals (60a) connected to the originating fixed IMS network 20 via the originating fixed IMS network 20, and is connected to the terminating fixed IMS network 20. A computer (specifically, telephone number investigation device 10) connected to a plurality of metal IP telephone terminals (60b) connected to the IMS network 30 via the originating fixed IMS network 20 has a metal IP telephone terminal to be investigated. A process of adding SDP parameters to an INVITE request to the IP telephone terminal 60 and transmitting the INVITE request to the originating fixed IMS network 20 (toward the metal IP telephone terminal 60 to be investigated), and at least the originating fixed IMS network 20 At least the process of receiving a response message via the response message and the process of determining the usage status of the telephone number of the metal IP telephone terminal 60 to be investigated in accordance with the response message are executed.

The telephone number investigation program according to the embodiment has an SDP parameter, a network protocol of IPv4, a media type of only audio, a media transport protocol of only RTP/AVP, and an audio codec of G. 711 μ-law and G. 722 (that is, SDP for metal IP telephones).

(Telephone number information provision system)
FIG. 15 is a system configuration diagram of a telephone number information providing system 100 according to an embodiment, which is an example of a specific configuration of the telephone number information providing system according to the present invention.

The telephone number information providing system 100 according to the embodiment includes one or more user terminals 90 and a network (for example, the originating fixed IMS network 20) which is connected to the user terminals 90 via an IP network 80 and is not shown in the drawings. A connected telephone number investigation server (specifically, the telephone number investigation device 10) is included.

The telephone number information providing system 100 according to the embodiment includes a telephone number investigation server (specifically, the telephone number investigation device 10) and a user terminal 90, and includes a telephone number investigation server (specifically, the telephone number investigation device 10) and a user terminal 90. When the telephone number investigation device 10) receives a telephone number investigation information provision request regarding the metal IP telephone terminal 60 from the user terminal 90, it sends the telephone number investigation determination unit to the user terminal 90 that received the telephone number investigation information provision request. The network interface unit 11 is provided for transmitting the usage status of the telephone number of the metal IP telephone terminal 60 determined by the metal IP telephone terminal 13 via the IP network 80 (see FIG. 7).

When the telephone number investigation server (specifically, the telephone number investigation device 10) receives a request for providing telephone number investigation information regarding the telephone number to be investigated from the user terminal 90 via the IP network 80, the telephone number investigation server (specifically, the telephone number investigation device 10) checks the usage status of the telephone number. Refer to a recording medium (specifically, a telephone number history database (DB) 15) that stores telephone number history information recorded in chronological order with a time stamp indicating the date and time of the determination given to each determination result. , the telephone number history information is transmitted via the IP network 80 to the user terminal 90 that has requested the provision of telephone number investigation information.

The recording medium storing the telephone number history information (specifically, the telephone number history database 15) may be distributed individually to users who need it. The recording medium (telephone number history database 15) records whether or not a telephone number to be investigated exists, which is generated by, for example, a telephone number investigation device 10 connected to a telecommunications carrier network via a dedicated line. It is a recording medium and may be used for searching in the distribution destination system.

A recording medium in which telephone number history information is stored (specifically, telephone number history database 15) stores the telephone number of the receiving party's telephone terminal (specifically, a landline telephone as metal IP telephone terminal 60). It is a collection of results of determining the effectiveness of usage conditions, and for example, each determination result is recorded in chronological order with a time stamp indicating the date and time of determination.

Distribution of the recording medium (specifically, the telephone number history database 15) is not limited to distribution in the form of a database recorded on a DVD or hard disk, but also includes distribution using a communication line.

(effect)
According to the telephone number investigation device 10 according to the embodiment, the usage status of telephone numbers in the originating fixed IMS network 20 and the terminating fixed IMS network 30 is determined by using an IMS interconnection interface or the like for interconnection between carriers. It becomes possible to realize the investigation of Therefore, by introducing a SIP protocol-based telephone number investigation tool that can be connected to the originating fixed IMS network 20 via UNI, a smooth transition to the new system infrastructure becomes possible.

According to the telephone number investigation device 10 according to the embodiment, the telephone number of the metal IP telephone terminal 60 can also be determined whether the telephone number is in use (valid (existing)) or not in use (invalid (missing number)). It becomes possible to accurately determine whether the Therefore, by introducing a SIP protocol-based telephone number investigation tool that can be connected to the originating fixed IMS network 20 via UNI, a smooth transition to the new system infrastructure becomes possible.

According to the telephone number investigation program according to the embodiment, the telephone number investigation device 10 sequentially reads and executes the program recorded in a memory (not shown), thereby establishing interconnection between carriers. Using an IMS interconnection interface or the like, it becomes possible to investigate the usage status of telephone numbers in the originating fixed IMS network 20 and the terminating fixed IMS network 30. Therefore, by introducing a SIP protocol-based telephone number investigation tool that can be connected to the originating fixed IMS network 20 via UNI, a smooth transition to the new system infrastructure becomes possible.

According to the telephone number information providing system 100 according to the embodiment, the telephone number is in a used state (valid (existing)) and an unused state (invalid (missing number)) as determined by the telephone number research device 10. )) can be provided to users who need the information. In addition, by distributing the recording medium in which telephone number history information is stored (specifically, the telephone number history database 15) to users who need the information, it is possible to utilize it on the user side, For example, it becomes possible to provide useful information in matters such as credit.

Although the embodiments of the present invention have been described above, the specific configuration aspects of the present invention are not limited to the above embodiments, and the embodiments described above are limited to the above embodiments without departing from the gist of the present invention. The present invention also includes forms in which modifications and changes are made to the above.

For example, in the above embodiment, the telephone number investigation device 10 is connected to a plurality of metal IP telephone terminals (60a) connected to the originating fixed IMS network 20 via the originating fixed IMS network 20. At the same time, it is connected via the originating fixed IMS network 20 to a plurality of metal IP telephone terminals (60b) connected to the terminating fixed IMS network 30. However, the network connection aspect of the telephone number investigation device according to the present invention is not limited to the aspect in the above-described embodiment; via the originating fixed IMS network 20 to only one of the metal IP telephone terminal (60a) of the It may be connected.

10 Telephone number investigation device 11 Network interface section 12 Message exchange control section 13 Telephone number investigation determination section 14 Telephone number history generation section 15 Telephone number history database 19 Home gateway (HGW)
20 Originating fixed IMS network 20a SIP server 21 IBCF (Inter-connection Border Control Function)
22 BGCF (Breakout Gateway Control Function)
30 Destination fixed IMS network 30a SIP server 31 IBCF (Inter-connection Border Control Function)
32 BGCF (Breakout Gateway Control Function)
41 Metal accommodation device 51 Metal accommodation device 60 Metal IP telephone terminal 60a Metal IP telephone terminal 60b Metal IP telephone terminal 90 User terminal 100 Telephone number information provision system

Claims (16)

A plurality of metal IP telephone terminals connected to the originating fixed IMS network and a plurality of metal IP telephone terminals connected to the terminating fixed IMS network are connected via the originating fixed IMS network to at least one of the plurality metal IP telephone terminals connected to the originating fixed IMS network. It is a telephone number investigation device that is connected to
Message exchange control that adds an SDP parameter to an INVITE request for the metal IP phone terminal to be investigated, sends the INVITE request to the originating fixed IMS network, and receives a response message at least via the originating fixed IMS network. Department and
a telephone number investigation determination unit that determines the usage status of the telephone number of the metal IP telephone terminal to be investigated according to the response message;
The SDP parameters are: the network protocol is IPv4, the media type is only audio, the media transport protocol is only RTP/AVP, and the audio codec is G. 711 μ-law and G. It is said to be 722,
A telephone number investigation device characterized by: The telephone number investigation determination department
If the response message is code 180 Ringing, code 200 OK, or code 486 Busy Here, it is determined that the phone number of the metal IP phone terminal to be investigated exists;
If the response message is code 404 Not Found, it is determined that the telephone number of the metal IP telephone terminal to be investigated is an unused number;
If the response message is code 410 Gone, it is determined that the metal IP telephone terminal to be investigated has been relocated and the telephone number is vacant;
The telephone number investigation device according to claim 1, characterized in that: If the response message is code 180 Ringing,
the telephone number investigation determination unit determines that the telephone number of the metal IP telephone terminal to be investigated exists;
The message exchange control unit transmits a CANCEL request to the originating fixed IMS network to stop ringing a ringing bell of the metal IP telephone terminal to be investigated.
The telephone number investigation device according to claim 1, characterized in that: If the response message is code 200 OK,
the telephone number investigation determination unit determines that the telephone number of the metal IP telephone terminal to be investigated exists;
the message exchange control unit disconnects communication of the metal IP telephone terminal to be investigated by transmitting a BYE request to the originating fixed IMS network;
The telephone number investigation device according to claim 1, characterized in that: Further equipped with a voice conversion section,
If the response message is code 410 Gone,
the telephone number investigation determination unit determines that the metal IP telephone terminal to be investigated has been relocated and the telephone number is vacant;
The voice conversion unit converts voice data transmitted as relocation guidance into text data and acquires telephone number information of a relocation destination of the metal IP telephone terminal to be investigated.
The telephone number investigation device according to claim 1, characterized in that: A plurality of metal IP telephone terminals connected to the originating fixed IMS network and a plurality of metal IP telephone terminals connected to the terminating fixed IMS network are connected via the originating fixed IMS network to at least one of the plurality metal IP telephone terminals connected to the originating fixed IMS network. A telephone number investigation method for investigating the usage status of the telephone number of the metal IP telephone terminal to be investigated using a device connected to the telephone number,
The device is
adding SDP parameters to an INVITE request for the metal IP telephone terminal to be investigated, and transmitting the INVITE request to the originating fixed IMS network;
receiving a response message via at least the originating fixed IMS network;
determining the usage status of the telephone number of the metal IP telephone terminal to be investigated according to the response message;
The SDP parameters are: network protocol is IPv4, media type is only audio, media transport protocol is only RTP/AVP, and audio codec is G. 711 μ-law and G. It is said to be 722,
A telephone number research method characterized by the following. If the response message is code 180 Ringing, code 200 OK, or code 486 Busy Here, it is determined that the phone number of the metal IP phone terminal to be investigated exists;
If the response message is code 404 Not Found, it is determined that the telephone number of the metal IP telephone terminal to be investigated is an unused number;
If the response message is code 410 Gone, it is determined that the metal IP telephone terminal to be investigated has been relocated and the telephone number is vacant;
7. The telephone number investigation method according to claim 6. If the response message is code 180 Ringing,
determining that the telephone number of the metal IP telephone terminal to be investigated exists;
Sending a CANCEL request to the originating fixed IMS network to stop the ringing of the ringing bell of the metal IP telephone terminal to be investigated;
7. The telephone number investigation method according to claim 6. If the response message is code 200 OK,
determining that the telephone number of the metal IP telephone terminal to be investigated exists;
cutting off communication of the metal IP telephone terminal to be investigated by transmitting a BYE request to the originating fixed IMS network;
7. The telephone number investigation method according to claim 6. If the response message is code 410 Gone,
It is determined that the metal IP telephone terminal to be investigated has been relocated and the telephone number is no longer available;
Converting voice data transmitted as relocation guidance to text data to obtain telephone number information of the relocation destination of the metal IP telephone terminal to be investigated;
7. The telephone number investigation method according to claim 6. A plurality of metal IP telephone terminals connected to the originating fixed IMS network and a plurality of metal IP telephone terminals connected to the terminating fixed IMS network are connected via the originating fixed IMS network to at least one of the plurality metal IP telephone terminals connected to the originating fixed IMS network. to a computer connected to
Adding SDP parameters to an INVITE request for the metal IP telephone terminal to be investigated and transmitting the INVITE request to the originating fixed IMS network;
receiving a response message via at least the originating fixed IMS network;
executing at least a process of determining the usage status of the telephone number of the metal IP telephone terminal to be investigated according to the response message;
The SDP parameters are: the network protocol is IPv4, the media type is only audio, the media transport protocol is only RTP/AVP, and the audio codec is G. 711 μ-law and G. It is said to be 722,
A telephone number research program that is characterized by: If the response message is code 180 Ringing, code 200 OK, or code 486 Busy Here, it is determined that the phone number of the metal IP phone terminal to be investigated exists;
If the response message is code 404 Not Found, it is determined that the telephone number of the metal IP telephone terminal to be investigated is an unused number;
If the response message is code 410 Gone, it is determined that the metal IP telephone terminal to be investigated has been relocated and the telephone number is vacant;
The telephone number investigation program according to claim 11. If the response message is code 180 Ringing,
determining that the telephone number of the metal IP telephone terminal to be investigated exists;
Sending a CANCEL request to the originating fixed IMS network to stop the ringing of the ringing bell of the metal IP telephone terminal to be investigated;
The telephone number investigation program according to claim 11. If the response message is code 200 OK,
determining that the telephone number of the metal IP telephone terminal to be investigated exists;
cutting off communication of the metal IP telephone terminal to be investigated by transmitting a BYE request to the originating fixed IMS network;
The telephone number investigation program according to claim 11. If the response message is code 410 Gone,
It is determined that the metal IP telephone terminal to be investigated has been relocated and the telephone number is no longer available;
Converting voice data transmitted as relocation guidance to text data to obtain telephone number information of the relocation destination of the metal IP telephone terminal to be investigated;
The telephone number investigation program according to claim 11. A telephone number investigation device according to any one of claims 1 to 5;
has a user terminal;
When the telephone number investigation device receives a telephone number investigation information provision request regarding the metal IP telephone terminal from the user terminal, the telephone number investigation determination unit transmits the telephone number investigation determination unit to the user terminal that received the telephone number investigation information provision request. comprising a network interface unit that transmits the determined usage status of the telephone number of the metal IP telephone terminal via an IP network;
A telephone number information provision system characterized by: