WO2022123942A1 - 電話番号調査装置、同方法、同プログラム、同情報提供システム - Google Patents
電話番号調査装置、同方法、同プログラム、同情報提供システム Download PDFInfo
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- WO2022123942A1 WO2022123942A1 PCT/JP2021/039547 JP2021039547W WO2022123942A1 WO 2022123942 A1 WO2022123942 A1 WO 2022123942A1 JP 2021039547 W JP2021039547 W JP 2021039547W WO 2022123942 A1 WO2022123942 A1 WO 2022123942A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
- H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
- H04M7/128—Details of addressing, directories or routing tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/4228—Systems providing special services or facilities to subscribers in networks
Definitions
- the present invention relates to a telephone number search device, the same method, the same program, the same information providing system, and a recording medium.
- the calling telephone number search device can be a PSTN (Public Switched Telephone Networks), a mobile communication network, or an IP (Internet Protocol) telephone network. Be connected. Then, the telephone number investigation device inquires about the subscriber data using the UNI (User Network Interface) protocol of ISDN (Integrated Service Digital Network), and "telephone number is valid”. , “Invalid”, “Relocation”, etc., can be researched on the usage status of telephone numbers.
- PSTN Public Switched Telephone Networks
- IP Internet Protocol
- IP telephone number investigation device capable of correctly determining the usage status of telephone numbers.
- the basic mechanism of an IP telephone is very different from that of a traditional fixed-line telephone technology. Therefore, for example, as described in Patent Document 4, an INVITE request with an incorrect description is intentionally made to an IP telephone network (SIP server). ) Is known as a telephone number investigation device for investigating the validity of an IP telephone number.
- the IP telephone to be searched in Patent Document 4 is a 050 type IP telephone to which an 11-digit telephone number starting with 050 is assigned, and a telephone number of the same format as a conventional subscriber telephone such as an optical telephone is used. It does not target the assigned 0AB-J type IP phone. Therefore, when researching the telephone number usage status of the 0AB-J type IP phone, it is not possible to investigate the effectiveness due to the refusal of the network side.
- the applicant can check the usage status of the telephone number in the IP telephone network by sending a specific SIP message that the IP telephone rejects the incoming call from the calling terminal (telephone number search device) of the UNI connection of the IP telephone network.
- a technology for making a judgment without using a signal to ring the incoming call bell, and patented it on March 31, 2017 as "Telephone number search device, the same method, the same program, and a recording medium" (Patent No. 6114901). Registered.
- the smooth transition to the new system infrastructure can be achieved by introducing a SIP protocol-based telephone number search tool that can connect to the NGN network.
- the IP telephones subject to the telephone number survey include telephone numbers of the same format as conventional subscriber telephones, such as optical telephones, in addition to the 050 type to which 11-digit telephone numbers starting with 050 are assigned.
- the assigned 0AB-J type is also included, and therefore, it can be accurately determined when conducting a valid / invalid investigation of a telephone number without depending on the type of IP telephone.
- Japanese Unexamined Patent Publication No. 2009-055512 Japanese Unexamined Patent Publication No. 2011-135121 Japanese Unexamined Patent Publication No. 2014-033474 Japanese Unexamined Patent Publication No. 2012-015605
- IMS is a standard for realizing multimedia services that are integrated by converting services that have been performed by fixed networks and mobile communications into IP, and as a system created according to the standard.
- an IMS interconnection interface or the like is used for interconnection between operators, and the telephone number usage status in the IMS network or IP telephone network (VoIP network) is determined without using the signal for ringing the incoming bell, the NGN network. It is necessary to introduce a SIP protocol-based telephone number search tool that can be connected to VoIP and to facilitate a smooth transition to the new system infrastructure.
- the present invention has been made to solve the above-mentioned problems, and uses an IMS interconnection interface or the like for interconnection between business operators to determine the usage status of telephone numbers in an IMS network or an IP telephone network (VoIP network).
- the purpose is to provide a telephone number search device, the same method, the same program, and the same information provision system that enable a smooth transition to the new system infrastructure.
- a telephone number investigation device connected to a telephone connected to at least an IMS network or a VoIP network, which is an incoming network, via an NGN network, and a first SDP parameter is used as an INVITE request for the telephone to be investigated.
- the first SDP parameter includes at least VoIP6 network protocol, and the NGN network sets the first SDP parameter to the incoming network.
- the SBC has a function of converting the network protocol into a VoIP network protocol suitable for the incoming call network and transmitting the message to the message exchange control unit.
- the first SDP parameter or when the first SDP parameter is converted, it is determined that the incoming network is the VoIP network, and the first SDP parameter of the first response message is converted. If not, and if the first response message is the first error code, it is determined that the incoming call network is the IMS network.
- the message exchange control unit investigates the second SDP parameter from the next time. It is attached to the INVITE request for the telephone and transmitted.
- the first SDP parameter is a parameter compliant with the IMS network
- the second SDP parameter is a parameter compliant with the VoIP network.
- the first SDP parameter is also a parameter for the telephone connected to the IMS network to reject an incoming call, and the first SDP parameter is the network protocol, media type, transport protocol, and codec.
- the telephone is set as a parameter for rejecting an incoming call.
- the first SDP parameter includes a media type including all media including audio, video, and applications.
- the second SDP parameter is a parameter for the telephone connected to the VoIP network to reject an incoming call
- the second SDP parameter is a network protocol (IPv4) and a media type (voice). Since one is fixed, the description of the parameter consisting of at least one of the transport protocol and the codec, or a combination thereof is set as a parameter for the telephone to reject an incoming call.
- the SBC has a function of converting the network protocol into an IPv4 network protocol suitable for the incoming network and transmitting the network protocol.
- the message exchange control unit determines that the incoming network is the VoIP network when the first response message is "200 OK" or when the first SDP parameter is converted. If the first response message has not been converted with the first SDP parameter and the first response message has the first error code, it is determined that the incoming network is the IMS network. ..
- the telephone number investigation determination unit receives the first error code included in the first response message, it determines that the telephone number of the telephone actually exists and includes it in the first response message. When the second or third error code is received, it is determined that the telephone number of the telephone is missing.
- the system includes the telephone number investigation device and a user terminal, and when the telephone number investigation device receives a telephone number investigation information provision request of the telephone from the user terminal, the telephone number investigation information provision is provided.
- the user terminal that has been requested is provided with a network interface unit that transmits the telephone number usage status of the telephone determined by the telephone number investigation determination unit via the IP network.
- the step of the telephone number investigation device applying the first SDP parameter to the INVITE request for the telephone to be investigated and transmitting the INVITE request to the incoming network selected by the NGN network, and the step of transmitting the INVITE request from the incoming network to the first.
- the first SDP parameter comprises at least IPv6 network protocol.
- the SBC When the NGN network transmits the first SDP parameter to the incoming network, the SBC has a function of converting the network protocol into an IPv4 network protocol suitable for the incoming network and transmitting the network protocol.
- the first response message is "200 OK", or when the first SDP parameter is converted, it is determined that the incoming network is the VoIP network, and the first response message of the first response message. If the SDP parameter of 1 is not converted and the first response message is the first error code, the step of determining that the incoming network is the IMS network is included.
- the first SDP parameter comprises at least IPv6 network protocol.
- the first response message is "200 OK", or when the first SDP parameter is converted, it is determined that the incoming network is the VoIP network, and the first response message of the first response message. If the SDP parameter of 1 is not converted and the first response message is the first error code, at least the process of determining that the incoming network is the IMS network is executed.
- an IMS interconnection interface or the like is used for interconnection between business operators, and the usage status of telephone numbers in the IMS network or IP telephone network is determined to enable smooth transition to a new system infrastructure. It is possible to provide a telephone number search device, the same method, the same program, and the same information providing system. Further, it is possible to provide a telephone number investigation device, the same method, the same program, and the same information providing system that can determine the telephone number usage status of a telephone without depending on the type of the incoming call network.
- FIG. 1 shows the network connection form of the telephone number investigation apparatus which concerns on embodiment of this invention.
- It is an operation sequence diagram of the telephone number investigation apparatus which concerns on embodiment of this invention, and is an example in the case of the arrival side VoIP network to which the 1st SDP parameter is added.
- It is an operation sequence diagram of the telephone number investigation apparatus which concerns on embodiment of this invention, and is an example in the case of the arrival side IMS network to which the 1st SDP parameter is added.
- It is an operation sequence diagram of the telephone number investigation apparatus which concerns on embodiment of this invention, and is an example in the case of the arrival side VoIP network to which the 2nd SDP parameter is added.
- It is a block diagram of the telephone number investigation apparatus which concerns on embodiment of this invention.
- FIG. 1 is a diagram showing a network connection mode of the telephone number investigation device 10 according to the present embodiment.
- the telephone number investigation device 10 according to the present embodiment has a plurality of investigation target telephone terminals (IMS terminals 50a, 50b and IP) connected to the IMS network 30 or the VoIP network (IP telephone network) 40.
- the telephone terminal 60) is connected via the NGN network 20.
- the IMS network 30 is constructed for each mobile communication carrier (carrier A) and NGN communication carrier (carrier B), and is managed and operated by each of the SIP servers 30a and 30b for each network (contract carrier).
- the IMS terminals 50a and 50b are connected.
- the IP telephone terminal 60 is connected to the IP telephone network 40 via the SIP server 30c of the VoIP communication operator (carrier C).
- the calling side telephone number investigation device 10 dials the telephone number of the called side telephone terminal to dial and transmit the SIP server 20a in the NGN network 20, the calling side SBC (session border controller) 21, and the calling side SBC (session border controller) 21. Routing is executed in the order of the called party SBC 31, 41, the SIP servers 30a, 30b, 30c, the called party IMS terminals 50a, 50b, and the IP telephone terminal 60.
- the UNI connection between the telephone number investigation device 10 and the NGN network 20, and the interconnection between the operators between the NGN network 20 and the IMS network 30 is the IMS interconnection via the calling side SBC21 and the called side SBC31.
- the NGN network 20 and the VoIP network 40 are secured for interconnection via the calling side SBC21 and the called side SBC41, and a specific SIP message to be described later transmitted from the telephone number investigation device 10 reaches the IMS network 30. ..
- FIG. 1 there are three networks on the called side, an IMS network, an NGN network, and a VoIP network. What is the IMS network to which the IMS terminal 50a is connected and the NGN network to which the IMS terminal 50b is connected? Since they have the same architecture, they will be described with the same number 30.
- the common interface for interconnection between IMS operators by this IP-IP connection is defined by the international standard (TS.29.165).
- SIP Session Description Protocol
- the sender In order to establish a session with SIP, the sender first sends a request that describes the media information in the SIP message, and the called party replies with a response that selects the media that can be handled from among them, and is used for communication. Share media information. Putting media information in a SIP message to start a session in this way is called an offer, and returning media information that can be handled in response to it is called an answer.
- This offer answer model is defined in RFC3264.
- the telephone number investigation device 10 includes an NGN network 20 (SIP server 20a), an IMS network 30 (SIP server 30a), an NGN network 30 (SIP server 30b), or a VoIP network 40 (SIP server 30b).
- SDP offer hereinafter referred to as an INVITE request
- INVITE invitation
- the called party is set to the SDP parameter.
- the IMS terminals 50a and 50b or the IP telephone terminal 60 of the above add and transmit an SDP parameter for rejecting an incoming call (hereinafter referred to as INVITE (SDP mismatch)).
- the incoming IMS terminal 50a, 50b or the IP telephone terminal 60 rejects the incoming call because the SDP parameters that can be used by itself are different, and returns a 488 error response (not acceptable: Not Acceptable Here) as a response message. do.
- the telephone number investigation device 10 can accurately determine the existence of the IMS terminals 50a and 50b or the IP telephone terminal 60 by a mechanism described later.
- RFC5853 which is an SBC standard
- IPv6 NGN network
- VoIP network VoIP network
- the SBC21 of the NGN network 20 has an SDP parameter (first SDP).
- first SDP SDP parameter
- the incoming network if the incoming network is a VoIP network 40, it is said to have a function of converting the network protocol into an IPv4 network protocol suitable for the incoming network and transmitting.
- the telephone number investigation device 10 determines whether the network protocol of the SDP parameter has been converted, and determines the IMS network 30 or the VoIP network 40.
- FIG. 2 is an operation sequence diagram of the telephone number investigation device according to the embodiment of the present invention, showing a sequence in the case of a VoIP network on the arrival side to which the first SDP parameter is added.
- the SDP negotiation procedure in the telephone number investigation device 10 the calling side NGN network 20, the calling side SBC21, the called side SBC41, the called side VoIP network 40, and the IP telephone terminal 60 is shown.
- the telephone number investigation device 10 corresponds to the telephone number investigation device 10 via the incoming IP telephone network 40 of the VoIP communication operator of the contract carrier of the IP telephone terminal 60 to be investigated via the NGN network 20.
- An INVITE request is transmitted to the IP telephone terminal 60.
- the IP telephone terminal 60 on the called side adds information to reject the incoming call to the SDP parameter (first SDP parameter) included in the INVITE request and transmits the information (steps S11 to S12: INVITE + first SDP: IPv6).
- the SDP parameter includes the network protocol of IPv6.
- the SBC21 on the NGN network 20 side executes a function mismatch correction function in order to match the SDP parameter of the INVITE request with the function of the VoIP network 40, and rewrites the SDP parameter of the INVITE request to IPv4 (converts to IPv4).
- the converted INVITE request (INVITE + mod.SDP: IPv4) is transmitted by the SBC 21 to the VoIP network (IPV4) 40 ahead (step S13).
- the SBC 41 of the VoIP network 40 transmits the converted INVITE request (INVITE + mod.SDP: IPv4) to the incoming terminal 60 (steps S14 to S15).
- the IP phone terminal 60 on the called side responds and returns a response message (200 OK + SDP: IPv4) (steps S16 to S17).
- the SBC 41 of the VoIP network 40 converts the SDP parameters returned from the incoming terminal 60 and transmits a response message (200 OK + mod. SDP) to the SBC 21 on the NGN network 20 side (step S18).
- the SBC 21 on the NGN network 20 side transmits the converted response message (200 OK + mod. SDP) to the telephone number search device 10.
- the telephone number search device 10 When the telephone number search device 10 receives the response message "200 OK + mod. SDP", it determines that the incoming network is the VoIP network 40. Further, when the telephone number investigation device 10 receives the response message "200 OK + mod. SDP", the telephone number investigation device 10 determines that the telephone number of the IP telephone terminal 60 actually exists. After the network determination, the telephone number investigation device 10 transmits a confirmation ACK request from the SIP transmitter for VoIP to the IP telephone terminal 60 on the called side when the incoming network is the VoIP network 40 (steps S21 to S25). ..
- the telephone number investigation device 10 transmits an INVITE request via the VoIP network 40 on the called side of the VoIP communication carrier of the contract carrier of the IP telephone terminal 60 to be investigated via the NGN network 20. At that time, information that the called party rejects the incoming call is added to the SDP parameter of IPv6 included in the INVITE request and transmitted (steps S31 to S32: INVITE + first SDP: IPv6).
- the SBC 21 on the NGN network 20 side executes a function mismatch correction function in order to match the SDP parameter of the INVITE request with the function of the VoIP network 40, and rewrites the SDP parameter of the INVITE request to IPv4.
- the converted INVITE request (INVITE + mod.SDP: IPv4) is transmitted by the SBC 21 to the VoIP network (IPV4) 40 ahead (step S33).
- the SBC 41 of the VoIP network 40 transmits the converted INVITE request (INVITE + mod.SDP: IPv4) to the VoIP network 40 which is the incoming network (step S34).
- the VoIP network 40 on the called side responds and returns a response message (error 404/183 + SDP: IPv4) with an SDP parameter and an error code (step S35).
- the SBC 41 of the VoIP network 40 converts the SDP parameter of the response message and transmits the response message (error 404/183 + mod.SDP) to the SBC 21 on the NGN network 20 side (step S36).
- the SBC 21 on the NGN network 20 side transmits the converted response message (error 404/183 + mod.SDP) to the telephone number investigation device 10 (steps S37 to S38).
- the telephone number investigation device 10 receives the error code (404/183) included in the response message which is an error response (steps S35 to S38), and acquires the telephone number usage status (missing number) of the telephone number of the IP telephone terminal 60. By doing so, it is determined that the number is missing. After the network determination, the telephone number investigation device 10 transmits a confirmation ACK request from the SIP transmitter for VoIP to the IP telephone terminal 60 on the called side when the incoming network is the VoIP network 40 (steps S39 to S42). ..
- the error response 404 code indicates the absence of the user, and the 183 code indicates a guidance response.
- FIG. 3 is an operation sequence diagram of the telephone number investigation device according to the embodiment of the present invention, and shows a sequence in the case of a landing side IMS network to which a first SDP parameter is added.
- the SDP negotiation procedure in the telephone number investigation device 10 the calling side NGN network 20, the calling side SBC21, the called side SBC31, the called side IMS network 30, and the IMS terminal 50a (50b) is shown.
- the telephone number investigation device 10 corresponds to the telephone number investigation device 10 via the incoming side IMS network 30 such as the mobile phone network of the contract carrier of the IMS terminal 50a (50b) to be investigated via the NGN network 20.
- the INVITE request is transmitted to the IMS terminal 50a (50b) of the above.
- the information that the incoming IMS terminal 50a (50b) rejects the incoming call is added to the SDP parameter (first SDP parameter) included in the INVITE request and transmitted (steps S51 to S55: INVITE + first SDP). : IPv6).
- the SBC 21 of the NGN network 20 supports IPv6, so that the network protocol is not converted.
- the incoming IMS terminal 50a (50b) rejects the incoming call because the SDP parameter is different from the one that can be used by itself, and returns a 488 error response (steps S56 to S60).
- the telephone number investigation device 10 can accurately acquire the telephone number usage status (existing, empty) of the IMS terminal 50a (50b).
- the telephone number investigation device 10 When the telephone number investigation device 10 receives the 488 error response via the NGN network 20, it confirms to the calling side SBC, the called side SBC of the contract carrier, and the receiving side IMS terminal 50a (50b) via the IMS network 30. ACK request for this is transmitted (steps S61 to S66). As described above, the telephone number investigation device 10 according to the present embodiment realizes a three-way handshake of INVITE request / 488 error response / ACK request for telephone number usage investigation, and enhances communication reliability. ing.
- the telephone number investigation device 10 sends the called side IMS terminal 50a (50b) to the NGN network 20 and IMS.
- the INVITE request is transmitted via the network 30 (steps S71 to S74).
- the telephone number investigation device 10 receives the "404/183" error response from the incoming IMS network 30 (SIP server 30a (30b)) (steps S75 to S78), and the telephone number usage status (missing number). ) Can be obtained.
- the telephone number investigation device 10 Upon receiving the 404 error response, the telephone number investigation device 10 transmits a confirmation ACK request to the IMS network 30 via the NGN network 20 (steps S81 to S84).
- FIG. 4 is an operation sequence diagram of the telephone number investigation device according to the embodiment of the present invention, and shows a sequence in the case of a destination VoIP network to which a second SDP parameter is added.
- the telephone number investigation device 10 corresponds to the telephone number investigation device 10 via the incoming IP telephone network 40 of the VoIP communication carrier of the contract carrier of the IP telephone terminal 60 to be investigated via the NGN network 20.
- An INVITE request is transmitted to the IP telephone terminal 60.
- the IP telephone terminal 60 on the called side adds information for rejecting the incoming call to the second SDP parameter included in the INVITE request and transmits the information (steps S211 to S212: INVITE + second SDP: IPv4).
- the second SDP parameter since the network protocol (IPv4) and the media type (voice) are fixed, the description of the parameter consisting of at least one of the transport protocol and the codec, or a combination thereof.
- the IP phone includes a parameter for rejecting an incoming call.
- the INVITE request (INVITE + second SDP: IPv4) is sent as it is without performing SDP conversion.
- SBC 21 transmits to the VoIP network (IPV4) 40 ahead (step S213).
- the SBC 41 of the VoIP network 40 transmits the received INVITE request (INVITE + second SDP: IPv4) to the incoming terminal 60 (steps S214 to S215).
- the IP phone terminal 60 on the called side rejects the incoming call because the SDP parameter is different from the one that can be used by itself, and returns an error 488 response (steps S216 to S217).
- the SBC 41 of the VoIP network 40 transmits the error 488 response returned from the incoming terminal 60 to the SBC 21 on the NGN network 20 side (step S218).
- the SBC 21 on the NGN network 20 side transmits an error 488 response to the telephone number investigation device 10.
- the telephone number investigation device 10 can accurately acquire the telephone number usage status (existing, empty) of the incoming terminal 60.
- the telephone number investigation device 10 transmits an ACK request for confirmation from the SIP transmitter for VoIP to the IP telephone terminal 60 on the called side (steps S221 to S225).
- the telephone number investigation device 10 sends INVITE to the called IP telephone terminal 60 via the NGN network 20 and the VoIP network 40.
- the request is transmitted (steps S231 to S234).
- the telephone number investigation device 10 receives the error code (183) included in the response message which is an error response (steps S235 to S238), and the telephone number usage status (missing number) of the telephone number of the IP telephone terminal 60.
- the telephone number investigation device 10 transmits an ACK request for confirmation from the SIP transmitter for VoIP to the IP telephone terminal 60 on the called side (steps S239 to S242).
- the 183 code which is an error response, indicates a guidance response.
- FIG. 5 is a block diagram showing the configuration of the telephone number investigation device 10 according to the present embodiment.
- the telephone number investigation device 10 includes a network interface unit 11, a message exchange control unit 12, a telephone number investigation determination unit 13, a telephone number history generation unit 14, and a telephone number history. It includes and is configured with DB (15).
- the network interface unit 11 is responsible for the communication interface for the telephone number search device 10 to perform communication conforming to the SIP protocol.
- the message exchange control unit 12 transmits an SDP mismatch INVITE request to the IMS terminals 50a and 50b or the IP telephone terminal 60, and sends a message (error) from the SIP server 30a and 30b of the called party IMS network 30 or the SIP server 30c of the VoIP network 40. Response) is received.
- the SDP parameters added to make the SDP mismatch include "network protocol", "media type", and "transport protocol", in which the incoming IMS terminal 50a, 50b or the IP telephone terminal 60 cannot be used. It is either one of the "codecs" or a combination thereof.
- the message exchange control unit 12 can use at least one of the network protocol, the media type, the transport protocol, and the codec, or a combination thereof, from which the incoming IMS terminal 50a, 50b or the IP telephone terminal 60 cannot be used. SDP parameter is added and transmitted.
- the telephone number investigation determination unit 13 determines the validity of the telephone number, such as the existence or nonexistence of the incoming IMS terminals 50a and 50b or the IP telephone terminal 60, according to the error response received via the message exchange control unit 12. do. When the answer message indicates that the incoming call is rejected, the telephone number investigation determination unit 13 determines that the telephone number of the IMS terminals 50a and 50b or the IP telephone terminal 60 actually exists. When the message exchange control unit 12 receives, for example, an error code 488 (first error code), if the telephone number of the incoming IMS terminal 50a, 50b or the IP telephone terminal 60 to be investigated actually exists. The determination is made, and for example, when the error code 404 (second error code) or 183 (third error code) is received, it is determined that the telephone number is missing.
- error code 488 first error code
- the telephone number investigation determination unit 13 receives an incoming call to be investigated. It may be determined that the telephone numbers of the IMS terminals 50a and 50b on the side "exist in an empty state”. Further, when the message exchange control unit 12 receives, for example, the error code 486 (fourth error code), the telephone numbers of the incoming IMS terminals 50a and 50b to be investigated are "existing in a busy state”. It may be determined that "to do”.
- the telephone number investigation determination unit 13 receives an incoming call to be investigated. It may be determined that the telephone numbers of the IMS terminals 50a and 50b on the side are "the user is absent and the contract is canceled and the number is absent".
- the telephone number investigation determination unit 13 is the IP telephone of the called party to be investigated. It may be determined that the telephone number of the terminal 60 "exists in an empty state".
- the telephone number investigation determination unit 13 is an investigation target when the message exchange control unit 12 receives, for example, an error code 183 (third error code) as a response message from the VoIP network 40 (SIP server 30c). It may be determined that the telephone number of the IP telephone terminal 60 on the called side is "missing".
- the telephone number history generation unit 14 assigns a time stamp indicating the determination date and time to each of the determination results of the telephone number investigation determination unit 13 and records the telephone number history DB (15) on the recording medium in chronological order. To construct.
- the telephone number history information stored in the telephone number history DB (15) includes the "telephone number” to be investigated for each investigation and the relocation destination or the relocation destination found at the time of the investigation.
- "New subscriber number” which is a contact phone number, "error code” returned from the incoming call network, "investigation date” (time stamp), and "other layer information” regarding the layer returned from the incoming call network. Is memorized and registered.
- the telephone number history information for example, when the investigation of the telephone number usage status of the telephone number "03-3359-0906" is executed, the investigation is performed in the above layout for each determination of the telephone number investigation determination unit 13. Information is sequentially stored and accumulated as history information.
- the telephone number history DB (15) contains "corporate name / individual name", address, age, and other "attribute information” and "map link information” that own the telephone number. "Credit information" for evaluating credit may be added and recorded.
- Each of the network interface unit 11, the message exchange control unit 12, the telephone number investigation determination unit 13, and the telephone number history generation unit 14 has a built-in memory in which a program is recorded, or a microprocessor in which the memory is externally attached. It is realized by a peripheral control LSI (Large Scale Integration) including communication, and the following functions as the telephone number search device 10 can be realized by sequentially reading and executing a program recorded in a memory by a microprocessor.
- LSI Large Scale Integration
- an SDP parameter that the IMS terminal 50a (50b) rejects an incoming call is added to the SDP parameter included in the INVITE request, and the NGN Transmission is performed via the IMS network 30, which is the incoming network for each contract carrier of the IMS terminals 50a (50b) selected by the network 20.
- the telephone number usage status of the IMS terminal 50a (50b) is determined according to the response message of the IMS network 30 (IMS terminal 50a (50b)) which is the incoming network selected by the NGN network 20.
- the telephone number history DB (15) is mounted on a semiconductor memory or a large-capacity recording medium such as an optical memory such as a hard disk or a DVD (Digital Versatile Disc).
- the telephone number investigation device 10 (message exchange control unit 12) confirms and determines the network protocol from the description contents of the SDP parameters with the IMS terminals 50a and 50b that are the targets of the telephone number investigation. (Step S91), media type confirmation determination (step S93), media transport protocol confirmation determination (step S95), and codec confirmation determination (step S97) are performed in this order for communication establishment negotiation.
- step S91 in the confirmation determination of the network protocol (step S91), when an IPv4 terminal that does not support IPv6 is mounted on the incoming IMS terminals 50a and 50b (step S91 “NO”), the IPv4 terminal is An error code 488 (warning code 300/301) indicating a network protocol mismatch is returned to the message exchange control unit 12 (step S92).
- step S91 “YES” when the IPv6 terminal is mounted (step S91 “YES”), the media type confirmation determination (step S93) is subsequently executed.
- the SDP description includes at least one media type (m) that the IPv6 terminal does not support (step S93 “NO”), the incoming IMS terminals 50a and 50b do not match the media types.
- the indicated error code 488 (warning code 304) is returned (step S94).
- step S95 When terminals corresponding to all media types are mounted on the incoming IMS terminals 50a and 50b (step S93 “YES”), the transport protocol confirmation determination is subsequently performed (step S95).
- all media types according to the SDP description can be used, but when a transport protocol (RTP / AVPF) that cannot be used is described (step S95 “NO”), the IMS of the called party which is the AVP terminal.
- the terminals 50a and 50b and the IP telephone terminal 60 return an error code 488 (warning code 302) (step S96).
- step S97 the codec confirmation determination is executed (step S97).
- a codec that cannot be used is described (step S97 “NO”), that is, H.I.
- a terminal using a video codec having a lower image quality and lower compression than 264, such as MPEG4 is mounted, the H.M. Terminals other than 264 return an error code 488 (warning code 305) to the telephone number search device 10 (message exchange control unit 12) (step S98).
- the telephone number investigation method described below can be achieved by having a computer execute each applicable procedure.
- the telephone number investigation device 10 sets the SDP parameter included in the INVITE request to the IMS terminal. 50a, 50b, the IP telephone terminal 60 is given an SDP parameter for rejecting an incoming call, and transmission is performed via the IMS network 30 or the VoIP network 40, which is the incoming call network for each contract carrier selected by the NGN network 20.
- the telephone number investigation determination unit 13 is the called party.
- the presence / absence is determined by decoding the response to the INVITE request due to the SDP mismatch returned from the IMS terminal 50a of the contract carrier A via the IMS network 30 of the contract carrier A (step S102).
- step S102 the error code 404 is transmitted from the called side IMS network 30 as described using the sequence diagram of FIGS. 3 (a) and 3 (b).
- the telephone number investigation determination unit 13 is performed by decoding the response (error code “404 or 183”) to the INVITE request due to the SDP mismatch returned from the IMS network 30 which is the selected incoming network (step S103, S107).
- step S104 determines whether the IMS terminal 50a is free or busy.
- the telephone number investigation determination unit 13 is selected as described using the sequence diagram of FIGS. 2 (a) and 2 (b). It is performed by decoding the response to the INVITE request due to the SDP mismatch, for example, the error code "486" returned from the IMS network 30 which is the incoming call network (steps S105 and S107), while the availability determination (step S104 "".
- the "vacant" is performed by decoding the response (error code 488) to the INVITE request due to the SDP mismatch (steps S106, S107).
- the usage status of the telephone number of the called side IMS terminal 50a determined in step S107 is determined by the telephone number history generation unit 14 based on the determination result by the telephone number investigation determination unit 13, for example, the telephone number shown in FIG.
- Telephone number history information is generated according to the history information layout, and is recorded in the telephone number history DB (15) each time.
- the error code can be used to confirm the incoming network determination of IMS / VoIP and the usage status of the telephone number.
- the telephone number history information accumulated in the telephone number history DB (15) is edited in an appropriate format when accumulated for a certain period of time, and is distributed to those who wish to search as a telephone number usage status survey recording medium.
- the telephone number investigation determination unit 13 is the called party.
- the existence / missing number is determined by decoding the response to the INVITE request due to the SDP mismatch, which is returned from the IMS terminal 50b via the NGN network 30 of the contract carrier B (step S108).
- step S108 the telephone number investigation determination unit 13 responds to the INVITE request due to the SDP mismatch (error code “404 or 183”) returned from the NGN network 30 which is the selected incoming network. Is performed by decoding (steps S109, S103).
- step S110 determines whether the terminal is free or busy.
- the telephone number investigation determination unit 13 responds to the INVITE request due to the SDP mismatch, which is returned from the NGN network 30 which is the selected incoming network. It is performed by decoding (error code "486") (steps S111 and S113).
- the free determination is performed by decoding the response (error code 488) to the INVITE request due to the SDP mismatch (steps S112 and S113).
- the usage status of the telephone number of the IMS terminal 50b determined in step S113 is determined by the telephone number history generation unit 14 according to the telephone number history information layout shown in FIG. 8 based on the determination result by the telephone number investigation determination unit 13.
- the telephone number history information is generated and recorded in the telephone number history DB (15) each time.
- the telephone number history information accumulated in the telephone number history DB (15) is edited in an appropriate format when accumulated for a certain period of time, and is distributed to those who wish to search as a telephone number usage status survey recording medium.
- the telephone number investigation determination unit 13 is the called party.
- the presence / absence is determined by decoding the response to the INVITE request due to the SDP mismatch, which is returned from the IP telephone terminal 60 of the above via the VoIP network 40 of the contract carrier C (step S114).
- step S114 the telephone number investigation determination unit 13 decodes the response (error code “183”) to the INVITE request due to the SDP mismatch, which is returned from the selected VoIP network 40. (Steps S117, S121).
- step S118 determines whether the IP telephone terminal 60 is in a free state or busy.
- the telephone number investigation determination unit 13 responds to the INVITE request due to the SDP mismatch, which is returned from the selected VoIP network 40. This is done by decoding the response (error code "486") (steps S119, S121).
- the vacancy determination is performed by decoding the response (error code 488) to the INVITE request due to the SDP mismatch (steps S120 and S121).
- the usage status of the IP telephone number determined in step S121 is determined by the telephone number history generation unit 14 based on the determination result by the telephone number investigation determination unit 13 according to the telephone number history information layout shown in FIG. Information is generated and recorded in the telephone number history DB (15) each time.
- the telephone number history information accumulated in the telephone number history DB (15) is edited in an appropriate format when accumulated for a certain period of time, and is distributed to those who wish to search as a telephone number usage status survey recording medium.
- the LNP Local Number Portability
- the incoming network is an IMS network (NGN network) or a VoIP network.
- the parameters of SDP mismatch are different between the IMS network (NGN network) and the VoIP network.
- the IMS network 30 (NGN network) supports both IPv4 and IPv6 network protocols, but the VoIP network 40 supports only IPv4 and does not support IPv6. Further, the IMS network 30 (NGN network) supports both audio and video media types, but in the case of the VoIP network 40, only audio is supported. Therefore, the telephone number investigation device 10 needs to set the SDP parameters corresponding to each of the incoming call networks to which the IP telephones are connected and make a transmission.
- the message exchange control unit 12 makes an INVITE request to the IP telephone (IMS terminal 50b or IP telephone terminal 60) to be investigated, for example, IPv6 as a network protocol.
- IPv6 IP telephone
- an offer (transmission) is made by adding a first SDP parameter compliant with the IMS network (NGN network) in which audio, video, and application (audio + video + application) are set as media types (step S201).
- NTN network IMS network
- audio + video + application audio + video + application
- step S202 “YES”) when the message exchange control unit 12 receives a response message (200OK + mode.SDP) as an answer from the incoming network to the INVITE request to which the first SDP parameter is added (step S202 “YES”), the investigation is performed. It is determined that the target IP phone is the "IP phone terminal 60", and a second SDP parameter compliant with the VoIP network set to IPv4 (voice only in the case of media type) is assigned as the network protocol from the SIP transmitter for VoIP. And send an INVITE request (step S204).
- a response message 200OK + mode.SDP
- IPv4 voice only in the case of media type
- the telephone number investigation determination unit 13 captures the response message received by the message exchange control unit 12 in response to the INVITE request provided in step S204, if the error code included in the response message is "488", the investigation target The telephone number assigned to the IP telephone terminal 60 of No. 1 is determined to exist, and if the error code is "183", it is determined to be a missing number (step S205).
- the telephone number investigation determination unit 13 receives a response message from the incoming network in step S202 that accepts IPv6 for which the network protocol of the SDP parameter has not been converted as an answer (step S202 “NO”), the telephone number investigation determination unit 13 receives the IP telephone to be investigated. Determines that the telephone number is "IMS terminal 50b", and if the error code included in the response message is "488" or "486", the telephone number actually exists, and if it is "404", it is determined that the telephone number is absent. (Step S203).
- the telephone number search device 10 since the IMS network 30 for each carrier, which is the incoming call network, is selected on the NGN network 20 side, it is possible to support MNP (Mobile Number Portability) which is a mobile number portability. , Unlike when connecting to UNI, there is no network difference (telephone terminal whose surveyed telephone number is connected to another network). Therefore, the procedure of the telephone number investigation is simplified, and the determination load on the telephone number investigation device 10 can be reduced. Further, since it is sufficient to install the telephone number investigation device 10 and the line only in the NGN network 20, the cost of capital investment can be reduced.
- MNP Mobile Number Portability
- the IMS terminals 50a and 50b such as mobile phones and the IP telephone terminal 60 are exemplified as the telephone terminals to be investigated, but the IP telephone terminal 60 is described.
- Metal IP telephones, or IP telephones, such as IP telephones and optical telephones, to which telephone numbers in the same format as conventional subscriber telephones are assigned are also included, and telephones are independent of the type of IP telephone and the receiving network. It can be accurately determined when conducting a valid / invalid investigation of a number.
- these telephone terminals negotiate in the order of network protocol confirmation, media type confirmation, media transport protocol confirmation, and codec confirmation in order to establish communication.
- IP network protocol
- media type confirmation media transport protocol confirmation
- codec confirmation in order to establish communication.
- the LNP cannot distinguish whether the incoming call network is an IMS network (NGN network) or a VoIP network, and if the incoming call network has different SDP mismatch parameters (IMS terminal 50b, IP telephone terminal 60), a message is exchanged.
- the control unit 12 transmits an INVITE request to the IP phone to be investigated, the INVITE request is given a first SDP parameter compliant with the NGN network 30 in which VoIP6 is set as a network protocol. It is transmitted to the IMS network 30 or the VoIP network 40 which is the incoming network for each contract carrier selected via the NGN network 20.
- the telephone number investigation determination unit 13 determines the telephone number usage status of the IP telephone according to the response message received by the message exchange control unit 12. Therefore, according to the telephone number search device 10 according to the present embodiment, the validity determination can be made accurate without depending on the incoming call network.
- the telephone numbers of the IMS terminals 50a and 50b and the IP telephone terminal 60 are used (valid (existing)) and not used (valid (existing)). It can accurately determine whether it is invalid (missing number) or relocation.
- a tool that can record the determination date and time together with the determination result on the recording medium (telephone number history DB (15)) is also prepared.
- the recording medium for example, as shown in FIG. 8 as an example of the data structure, the determination result, the information of the transfer destination telephone number linked to the transfer source telephone number, and the determination are made for each telephone number to be investigated. The due date and time are recorded.
- the program according to the present embodiment is connected to, for example, the IMS network 30 (NGN network) or the VoIP network 40, and the telephone (IMS terminal 50b, IP telephone terminal 60) is connected to the NGN network (NGN network). It is a program of the telephone number investigation device 10 connected via 20). Then, for example, as shown in FIGS. 1 and 9, the program assigns the first SDP parameter to the computer (telephone number investigation device 10) to the INVITE request for the telephone to be investigated, and selects the NGN network.
- a process of transmitting an INVITE request to the incoming network step S201
- a process of receiving a response message including the first SDP parameter from the incoming network step S202
- a telephone telephone number according to the first answer message for example, the IMS network 30 (NGN network) or the VoIP network 40, and the telephone (IMS terminal 50b, IP telephone terminal 60) is connected to the NGN network (NGN network).
- the program assigns the first SDP parameter to the computer (telephone number investigation device
- the process for determining the usage status (steps S203 to S205) and the first SDP parameter include at least IPv6 network protocol and the first response message is "200 OK", or the first SDP. If the network protocol of the parameter is converted, it is determined that the incoming network is a VoIP network, the first SDP parameter of the first response message is not converted, and the response message is the first error code. In the case of (Error 488), at least the process of determining that the incoming call network is the IMS network (step S202) is executed.
- the telephone number investigation device 10 sequentially reads and executes the program recorded in the memory (not shown), thereby using the IMS interconnection interface or the like for interconnection between business operators, and IMS. It is possible to carry out research on the usage status of telephone numbers in the network 30. Therefore, by introducing a SIP protocol-based telephone number investigation tool that can be connected to the NGN network 20, a smooth transition to the new system infrastructure will be possible. In particular, the telephone number usage status of the telephone (IMS terminal 50b or IP telephone terminal 60) can be determined without depending on the type of the incoming call network (IMS network 30 (NGN network), VoIP network 40).
- IMS network 30 NGN network
- VoIP network 40 Voice over IP network
- FIG. 10 is a system configuration diagram of the telephone number investigation information providing system 100 according to the present embodiment.
- the telephone number investigation information providing system 100 according to the present embodiment is connected to one or more user terminals 90 and the user terminals 90 via the IP network 80, and is connected to a network (not shown). It includes a telephone number investigation server (telephone number investigation device 10 in FIG. 1).
- the telephone number investigation server 10 When the telephone number investigation server 10 receives a telephone number investigation information provision request based on the investigation target number from the user terminal 90 via the IP network 80, the telephone number investigation server 10 makes an INVITE request to the investigation target telephones (IMS terminal 50b, IP telephone terminal 60). The first SDP parameter is added to the INVITE request, and the telephone is transmitted to the IMS network 30 or the VoIP network 40, which is the incoming network for each contract carrier of the telephone selected via the NGN network 20. Subsequently, when the telephone number investigation server 10 receives the response message from the incoming network, the incoming network is a VoIP network when the response message is "200 OK" or when the first SDP parameter is converted.
- the telephone number investigation server 10 receives the telephone number investigation information provision request of the telephone terminal from the user terminal 90 to the network interface unit 11 shown in FIG. 5, the telephone number investigation determination unit 13 determines. A function of transmitting the telephone number usage status of the telephone terminal to the user terminal 90 for which the telephone number investigation information provision request is made via the IP network 80 is added.
- the telephone number investigation server 10 when the telephone number investigation server 10 receives the telephone number investigation information provision request based on the investigation target number from the user terminal 90 via the IP network 80, the telephone number investigation server 10 assigns a time stamp indicating the determination date and time to each of the determination results.
- the telephone number investigation information recorded in time series is referred to the recording medium (telephone number history DB (15)) in which the telephone number investigation information is recorded, and is transmitted to the user terminal 90 requested to provide the telephone number investigation information via the IP network 80.
- the telephone number investigation information recording medium (telephone number history DB (15)) may be distributed independently to necessary users.
- the recording medium (telephone number history DB (15)) is a recording medium generated by the telephone number investigation device 10 connected to the telecommunications carrier network via a dedicated line to record the existence or nonexistence of the investigation target number. , Used for searching on the distribution destination system.
- the telephone number investigation information recording medium (telephone number history DB (15)) is a collection of results of determining the effectiveness of the telephone number usage status of the telephone terminal on the called side, and is, for example, a data structure shown in FIG. 8 as an example. Each of the judgment results is recorded in chronological order with a time stamp indicating the judgment date and time.
- the distribution of recording media is not limited to databases recorded on DVDs and hard disks, but also includes distribution using communication lines.
- the telephone number investigation information providing system 100 According to the telephone number investigation information providing system 100 according to the present embodiment, a state in which the telephone number is used (valid (existing)) and a state in which the telephone number is not used (invalid (missing number)) determined by the telephone number investigation device 10 ), It is possible to provide necessary users with different states (transfer) in which the transfer destination telephone number is being guided. Similarly, by distributing the telephone number investigation information recording medium (telephone number history DB (15)) to users who need it, it can be utilized on the user side, and for example, a remarkable effect can be obtained in credit and the like.
- telephone number investigation information recording medium telephone number history DB (15)
- 10 ... Telephone number investigation device (server), 11 ... Network interface unit, 12 ... Message exchange control unit, 13 ... Telephone number investigation judgment unit, 14 ... Telephone number history generation unit, 15 ... Telephone number history DB (phone number investigation information) Recording medium), 20 ... NGN network, 21 ... SBC, 20a ... SIP server, 30 ... IMS (NGN) network, 30a, 30b, 30c ... SIP server, 31 ... SBC, 40 ... VoIP network, 41 ... SBC, 50a ... IMS terminal (mobile phone), 50b ... IMS terminal (IP phone), 60 ... IP phone terminal (IP phone), 80 ... IP network, 90 ... user terminal, 100 ... phone number survey information providing system
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Abstract
Description
IP電話の基本的な仕組みは伝統的な固定電話の技術とは大きく異なり、このため、例えば、特許文献4に記載されているように、敢えて正しくない記述のINVITE要求をIP電話網(SIPサーバ)に送信することで、IP電話番号の有効性を調査する電話番号調査装置が知られている。
ここで、電話番号調査の対象となるIP電話には、050で始まる11桁の電話番号が割り当てられた050型の他に、光電話等、これまでの加入者電話と同じ形式の電話番号が割り当てられた0AB-J型も含まれ、したがって、IP電話の種類に依存することなく、電話番号の有効/無効調査を行う際に正確に判定することができる。
特に、電話の電話番号使用状況について、着信網の種類に依存することなく、判定することができる、電話番号調査装置、同方法、同プログラム、同情報提供システムを提供することを目的とする。
(1)少なくとも着信網であるIMS網又はVoIP網に接続された電話にNGN網を介して接続される電話番号調査装置であって、第1のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して前記NGN網の選択する前記着信網に前記INVITE要求を送信し、前記着信網から第1の応答メッセージを受信するメッセージ交換制御部と、前記第1の応答メッセージに応じて、前記電話の電話番号使用状況について判定する電話番号調査判定部と、を備え、前記第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、前記NGN網が前記第1のSDPパラメータを前記着信網へ送信する際に、SBCは前記ネットワークプロトコルを前記着信網に適したIPv4のネットワークプロトコルに変換して送信する機能を有しており、前記メッセージ交換制御部は、前記第1の応答メッセージが「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、前記第1の応答メッセージの前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが第1のエラーコードの場合、前記着信網が前記IMS網であると判定することを特徴とする。
前記電話番号調査装置が、第1のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して前記NGN網の選択する前記着信網に前記INVITE要求を送信するステップと、前記着信網から前記第1のSDPパラメータを含む応答メッセージを受信するステップと、前記第1の応答メッセージに応じて、前記電話の電話番号使用状況について判定するステップと、
前記第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、
前記NGN網が前記第1のSDPパラメータを前記着信網へ送信する際に、SBCは前記ネットワークプロトコルを前記着信網に適したIPv4のネットワークプロトコルに変換して送信する機能を有しており、
前記第1の応答メッセージが「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、前記第1の応答メッセージの前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが第1のエラーコードの場合、前記着信網が前記IMS網であると判定するステップと、を含む。
電話番号調査装置に、
第1のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して前記NGN網の選択する前記着信網に前記INVITE要求を送信させる処理と、前記着信網から前記第1のSDPパラメータを含む応答メッセージを受信させる処理と、前記第1の応答メッセージに応じて、前記電話の電話番号使用状況について判定させる処理と、
前記第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、
前記第1の応答メッセージが「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、前記第1の応答メッセージの前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが第1のエラーコードの場合、前記着信網が前記IMS網であると判定させる処理と、を少なくとも実行させる。
図1は、本実施形態に係る電話番号調査装置10の網接続形態を示す図である。図1に示すように、本実施形態に係る電話番号調査装置10は、IMS網30又はVoIP網(IP電話網)40に接続された調査対象の複数の電話端末(IMS端末50a,50b及びIP電話端末60)が、NGN網20を介して接続されている。
このとき、電話番号調査装置10とNGN網20との間はUNI接続、NGN網20とIMS網30との間の事業者間相互接続は発信側SBC21、着信側SBC31を介してIMS相互接続が担保され、NGN網20とVoIP網40は、発信側SBC21、着信側SBC41を介して相互接続が担保され、電話番号調査装置10から発信される後述する特定のSIPメッセージがIMS網30に到達する。
このIP-IP接続によるIMS事業者間の相互接続共通インタフェースは、国際標準(TS.29.165)で規定されている。
ここでは、電話番号調査装置10、発信側のNGN網20、発信側SBC21、着信側SBC41、着信側のVoIP網40、IP電話端末60におけるSDPネゴシエーション手順が示されている。
ここで、NGN網20は、IPv6をサポートしているため、SDPパラメータは、IPv6のネットワークプロトコルを含んでいる。
また、電話番号調査装置10は、応答メッセージ「200 OK+mod.SDP」を受信した場合、IP電話端末60の電話番号が実在すると判定する。
網判定後、電話番号調査装置10は、着信網がVoIP網40の場合、VoIP用のSIP発信機から着信側のIP電話端末60へ確認のためのACKリクエストを送信する(ステップS21~S25)。
電話番号調査装置10は、NGN網20を介して調査対象となるIP電話端末60の契約キャリアのVoIP通信事業者の着信側VoIP網40経由でINVITE要求を送信する。そのとき、INVITE要求に含まれるIPv6のSDPパラメータに着信側が着信を拒否する情報を付与して送信する(ステップS31~S32:INVITE+第1のSDP:IPv6)。
VoIP網40のSBC41は、変換されたINVITE要求(INVITE+mod.SDP:IPv4)を着信網であるVoIP網40まで送信する(ステップS34)。
網判定後、電話番号調査装置10は、着信網がVoIP網40の場合、VoIP用のSIP発信機から着信側のIP電話端末60へ確認のためのACKリクエストを送信する(ステップS39~S42)。
なお、エラー応答である404コードはユーザ不在、183コードはガイダンス応答を示す。
これに対し、着信側のIMS端末50a(50b)は、SDPパラメータが自身で使用可能なものと異なるために着信を拒否し、488エラー応答を返信する(ステップS56~S60)。
電話番号調査装置10は、404エラー応答を受信すると、NGN網20経由でIMS網30へ確認のためのACKリクエストを送信する(ステップS81~S84)。
電話番号調査装置10は、VoIP用のSIP発信機から着信側のIP電話端末60へ確認のためのACKリクエストを送信する(ステップS221~S225)。
電話番号調査装置10は、VoIP用のSIP発信機から着信側のIP電話端末60へ確認のためのACKリクエストを送信する(ステップS239~S242)。なお、エラー応答である183コードはガイダンス応答を示す。
なお、メッセージ交換制御部12が、例えば、エラーコード488(第1のエラーコード)を受信した場合に、調査対象である着信側のIMS端末50a,50b又はIP電話端末60の電話番号が実在すると判定し、例えば、エラーコード404(第2のエラーコード)又は183(第3のエラーコード)を受信した場合に電話番号が欠番であると判定する。
以下、図6のIMS網30におけるSDPネゴシエーション手順のフローチャートを参照して、図5の本実施形態に係る電話番号調査装置10のSDP記述に基づく通信確立手順から説明する。
ここで、SDP記述にIPv6端末が対応していないメディア種別(m)が一つでも含まれていた場合(ステップS93“NO”)、着信側のIMS端末50a,50bは、メディア種別の不一致を示すエラーコード488(warningコード304)を返信する(ステップS94)。
NGN網20の場合、上記した通信の確立手順において4つの着信を拒否するパラメータの記述が可能であり、ネットワークプロトコル、メディア種別、トランスポートプロトコル、コーデックの4つ全てのSDPパラメータを記述することにより、着信ベルを鳴動させる信号を用いないで正確に判定することができる。
なお、図6はIMS網におけるSDPネゴシエーション手順を示したが、VoIP網の場合は、ネットワークプロトコル(IPv4)とメディア種別(音声)の2つは固定化されるため、トランスポートプロトコル、コーデックの2つの着信を拒否するパラメータ記述により、着信ベルを鳴動させる信号を用いないで正確に判定することができる。
ここでは、エラーコードにより、IMS/VoIPの着信網判定と電話番号使用状況を確認することができる。網判定情報をDB化することで次回以降の電話番号調査に活用できる。電話番号履歴DB(15)に蓄積された電話番号履歴情報は、一定期間分蓄積された時点で適当な形式で編集し、電話番号使用状況調査記録媒体として検索用に希望者に頒布される。
着信側のIMS端末50bの話中判定(ステップS110“話中”)は、電話番号調査判定部13が、選択された着信網であるNGN網30から返信される、SDP不一致によるINVITE要求に対する応答(エラーコード“486”)を解読することにより行われる(ステップS111,S113)。
一方、空き判定(ステップS110“空き”)は、SDP不一致によるINVITE要求に対する応答(エラーコード488)を解読することにより行われる(ステップS112,S113)。
着信側のIP電話端末60の話中判定(ステップS118“話中”)は、電話番号調査判定部13が、選択された着信網であるVoIP網40から返信される、SDP不一致によるINVITE要求に対する応答(エラーコード“486”)を解読することにより行われる(ステップS119,S121)。
一方、空き判定(ステップS118“空き”)は、SDP不一致によるINVITE要求に対する応答(エラーコード488)を解読することにより行われる(ステップS120,S121)。
以上説明したように本実施形態に係る電話番号調査装置10によれば、事業者間相互接続にIMS相互接続インタフェース等を利用し、IMS網30における電話番号の使用状況のリサーチを実現することができる。このため、NGN網20と接続可能なSIPプロトコルベースの電話番号調査ツールを導入することにより新システム基盤への円滑な移行を可能にする。
そして、着信網から応答メッセージを受信すると、応答メッセージが、「200 OK」の場合、又は第1のSDPパラメータが変換されている場合、着信網がVoIP網であると判定し、調査対象のIP電話が接続される着信網の網判定を行う。このことにより、電話番号調査判定部13が、メッセージ交換制御部12で受信した応答メッセージに応じて、IP電話の電話番号使用状況について判定する。したがって、本実施形態に係る電話番号調査装置10によれば、着信網に依存せずに有効性判定を正確化することができる。
なお、本実施形態に係るプログラムは、例えば、図1に示すように、IMS網30(NGN網)又はVoIP網40に接続され、電話(IMS端末50b,IP電話端末60)が、NGN網(20)を介して接続される電話番号調査装置10のプログラムである。
そして、そのプログラムは、例えば、図1及び図9に示すように、コンピュータ(電話番号調査装置10)に、第1のSDPパラメータを調査対象の電話に対するINVITE要求に付与してNGN網の選択する着信網にINVITE要求を送信させる処理(ステップS201)と、着信網から第1のSDPパラメータを含む応答メッセージを受信させる処理(ステップS202)と、第1の応答メッセージに応じて、電話の電話番号使用状況について判定させる処理(ステップS203~S205)と、第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、第1の応答メッセージが、「200 OK」の場合、又は第1のSDPパラメータのネットワークプロトコルの変換がされている場合、着信網がVoIP網であると判定し、第1の応答メッセージの第1のSDPパラメータが変換されていない場合、かつ応答メッセージが第1のエラーコード(エラー488)の場合、着信網がIMS網であると判定させる処理(ステップS202)と、を少なくとも実行させるものである。
図10は、本実施形態に係る電話番号調査情報提供システム100のシステム構成図である。図10に示すように、本実施形態に係る電話番号調査情報提供システム100は、1以上のユーザ端末90と、ユーザ端末90とはIP網80経由で接続されるとともに、図示省略した網と接続される電話番号調査サーバ(図1の電話番号調査装置10)とを含む。
Claims (12)
- 少なくとも着信網であるIMS網又はVoIP網に接続された電話にNGN網を介して接続される電話番号調査装置であって、
第1のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して前記NGN網の選択する前記着信網に前記INVITE要求を送信し、前記着信網から第1の応答メッセージを受信するメッセージ交換制御部と、
前記第1の応答メッセージに応じて、前記電話の電話番号使用状況について判定する電話番号調査判定部と、を備え、
前記第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、
前記NGN網が前記第1のSDPパラメータを前記着信網へ送信する際に、SBCは前記ネットワークプロトコルを前記着信網に適したIPv4のネットワークプロトコルに変換して送信する機能を有しており、
前記メッセージ交換制御部は、
前記第1の応答メッセージが、「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、
前記第1の応答メッセージの前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが第1のエラーコードの場合、前記着信網が前記IMS網であると判定することを特徴とする電話番号調査装置。 - 前記メッセージ交換制御部は、前記第1の応答メッセージが「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、次回から第2のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して送信することを特徴とする請求項1に記載の電話番号調査装置。
- 前記第1のSDPパラメータは、前記IMS網に準拠したパラメータであり、
前記第2のSDPパラメータは、前記VoIP網に準拠したパラメータであることを特徴とする請求項2に記載の電話番号調査装置。 - 前記第1のSDPパラメータは、前記IMS網に接続された前記電話が着信を拒否するパラメータでもあり、
前記第1のSDPパラメータは、前記ネットワークプロトコル、メディア種別、トランスポートプロトコル、コーデックのうちの少なくとも一つ、又はその組み合わせからなるパラメータの記述で前記電話が着信を拒否するパラメータとされていることを特徴とする請求項1から請求項3のいずれか1項に記載の電話番号調査装置。 - 前記第1のSDPパラメータが、音声、映像、及び、アプリケーションを含む全メディアを含んだメディア種別を含んでいることを特徴とする請求項1から請求項4のいずれか1項に記載の電話番号調査装置。
- 前記第2のSDPパラメータは、前記VoIP網に接続された前記電話が着信を拒否するパラメータであり、
前記第2のSDPパラメータは、ネットワークプロトコル(IPv4)とメディア種別(音声)の2つは固定化されるため、トランスポートプロトコル、コーデックのうちの少なくとも一つ、又はその組み合わせからなるパラメータの記述で前記電話が着信を拒否するパラメータとされていることを特徴とする請求項3に記載の電話番号調査装置。 - 前記NGN網が前記第1のSDPパラメータを前記着信網へ送信する際に、前記SBCは前記ネットワークプロトコルを前記着信網に適したIPv4のネットワークプロトコルに変換して送信する機能を有しており、
前記メッセージ交換制御部は、前記第1の応答メッセージが「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、前記第1の応答メッセージが前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが前記第1のエラーコードの場合、前記着信網が前記IMS網であると判定することを特徴とする請求項1から請求項6のいずれか1項に記載の電話番号調査装置。 - 前記電話番号調査判定部は、前記第1の応答メッセージに含まれる前記第1のエラーコードを受信した場合、前記電話の電話番号が実在すると判定し、前記第1の応答メッセージに含まれる第2又は第3のエラーコードを受信した場合、前記電話の電話番号が欠番であると判定することを特徴とする請求項1から請求項7のいずれか1項に記載の電話番号調査装置。
- 前記電話番号調査判定部は、前記第2のSDPパラメータの送信に対して前記着信網から受信する第2の応答メッセージに含まれる第1のエラーコードを受信した場合、前記電話の電話番号が実在すると判定し、前記第2の応答メッセージに含まれる第3のエラーコードを受信した場合、前記電話が欠番であると判定することを特徴とする請求項2、請求項3又は請求項6に記載の電話番号調査装置。
- 請求項1から請求項9のいずれか1項に記載の電話番号調査装置と、
ユーザ端末と、を備え、
前記電話番号調査装置は、前記ユーザ端末から前記電話の電話番号調査情報提供要求を受信すると、前記電話番号調査情報提供要求があった前記ユーザ端末に前記電話番号調査判定部が判定した前記電話の電話番号使用状況を前記IP網経由で送信する網インタフェース部を備える、システム。 - 少なくとも着信網であるIMS網又はVoIP網に接続された電話にNGN網を介して接続される電話番号調査装置を用いて、調査対象となる前記電話の電話番号の使用状況を調査する電話番号調査方法であって、
前記電話番号調査装置が、
第1のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して前記NGN網の選択する前記着信網に前記INVITE要求を送信するステップと、
前記着信網から第1の応答メッセージを受信するステップと、
前記第1の応答メッセージに応じて、前記電話の電話番号使用状況について判定するステップと、
前記第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、
前記NGN網が前記第1のSDPパラメータを前記着信網へ送信する際に、SBCは前記ネットワークプロトコルを前記着信網に適したIPv4のネットワークプロトコルに変換して送信する機能を有しており、
前記第1の応答メッセージが、「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、
前記第1の応答メッセージの前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが第1のエラーコードの場合、前記着信網が前記IMS網であると判定するステップと、を含む電話番号調査方法。 - 少なくとも着信網であるIMS網又はVoIP網に接続された電話にNGN網を介して接続される電話番号調査装置のプログラムであって、
電話番号調査装置に、
第1のSDPパラメータを調査対象の前記電話に対するINVITE要求に付与して前記NGN網の選択する前記着信網に前記INVITE要求を送信させる処理と、
前記着信網から第1の応答メッセージを受信させる処理と、
前記第1の応答メッセージに応じて、前記電話の電話番号使用状況について判定させる処理と、
前記第1のSDPパラメータが、少なくともIPv6のネットワークプロトコルを含んでおり、
前記第1の応答メッセージが「200 OK」の場合、又は前記第1のSDPパラメータが変換されている場合、前記着信網が前記VoIP網であると判定し、
前記第1の応答メッセージの前記第1のSDPパラメータが変換されていない場合、かつ前記第1の応答メッセージが第1のエラーコードの場合、前記着信網が前記IMS網であると判定させる処理と、を少なくとも実行させるプログラム。
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- 2021-10-26 EP EP21903046.7A patent/EP4089991A4/en active Pending
- 2021-10-26 AU AU2021395654A patent/AU2021395654B2/en active Active
- 2021-10-26 WO PCT/JP2021/039547 patent/WO2022123942A1/ja unknown
- 2021-11-29 TW TW110144308A patent/TWI798962B/zh active
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JP6889507B1 (ja) | 2021-06-18 |
EP4089991A4 (en) | 2023-09-20 |
US20230291774A1 (en) | 2023-09-14 |
TWI798962B (zh) | 2023-04-11 |
TW202231046A (zh) | 2022-08-01 |
EP4089991A1 (en) | 2022-11-16 |
AU2021395654B2 (en) | 2022-10-20 |
AU2021395654A1 (en) | 2022-09-08 |
JP2022090490A (ja) | 2022-06-17 |
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