CN107566664B - Method for obtaining real called number in mobile network calling - Google Patents
Method for obtaining real called number in mobile network calling Download PDFInfo
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- CN107566664B CN107566664B CN201710727449.1A CN201710727449A CN107566664B CN 107566664 B CN107566664 B CN 107566664B CN 201710727449 A CN201710727449 A CN 201710727449A CN 107566664 B CN107566664 B CN 107566664B
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Abstract
The invention discloses a method for acquiring a real called number in a mobile network call, which provides a solution of 'C/D port parallel connection and Nc port serial connection', introduces a MAP protocol analysis processing mechanism, analyzes an MSRN/TLDN number application process, and dynamically acquires a mapping relation between an MSISDN/MDN number and the MSRN/TLDN number for call processing. The invention has the beneficial effects that: the invention adopts the processing mode of combining the parallel connection of the C/D port flow and the serial connection of the Nc port flow, realizes the real-time dynamic acquisition of MSRN/TLDN number and MSISDN/MDN mapping, can process according to the real called number MSISDN/MDN when the Nc port signaling is analyzed, and has obvious operability and practical significance; from the aspect of the influence, the flow of the C/D port is in a parallel connection mode, so that the influence on the service of the C/D port is not influenced, and the influence on the existing network is reduced to the minimum.
Description
Technical Field
The invention relates to the field of real-time online detection of security and fraudulent numbers of a telecommunication network, in particular to a method for acquiring a real called number in a mobile network call.
Background
With the development of communication technology, mobile network communication has become the current mainstream. Compared with the traditional fixed network communication, the mobile network has the convenience of mobile roaming. Meanwhile, because the access point of the mobile subscriber is not fixed, the mobile call flow needs to dynamically address the called party according to the access point of the subscriber.
For this reason, a concept of a temporary dynamic roaming number is introduced in mobile communication. This number is called the MSRN number in the gav network and the TLDN number in the C network. The MSRN/TLDN is distributed and maintained in the end office VMSC, and each VMSC reserves a specific number segment. When the user in VMSC is called, VMSC allocates an idle MSRN/TLDN number for the user. The forward office in the network uses the MSRN/TLDN number to analyze the VMSC routed to the subscriber access. After the call is routed to the VMSC, the VMSC releases the MSRN/TLDN number for reuse by another call.
The access point of the telecommunication network number detection system is positioned between long distance offices (TSS), according to the mobile calling principle, in the SIP/BICC calling signaling between the long distance offices, the called number is the MSRN/TLDN number which is temporarily distributed, the specific user can not be directly identified from the number, and the harmful fraud number detection function related to the calling number and the called number can not be realized. Therefore, there is a need for a method to map the temporarily assigned MSRN/TLDN number per call to the corresponding MSISDN/MDN number and populate the CDR details.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for acquiring a real called number in a mobile network call, which adopts a processing mode of combining C/D port flow parallel connection and Nc port flow serial connection to realize the real-time dynamic acquisition of MSRN/TLDN number and MSISDN/MDN mapping.
In order to solve the above technical problem, the present invention provides a method for acquiring a real called number in a mobile network call, which comprises the following steps:
(1) after a mobile subscriber accesses a VMSC (home location Register) of a currently located end office through a starting-up and location updating process, the VMSC of the currently located end office of the subscriber is recorded in an HLR (home location Register), when a calling party calls the mobile subscriber, the mobile subscriber uses a mobile phone number MSISDN/MDN to dial to initiate a call, and the VMSC of the currently located end office of a called party is inquired from the HLR according to the MSISDN/MDN number from the VMSC of the calling end office or a GMSC of a calling gateway;
(2) HLR applies temporary dynamic roaming number to VMSC according to VMSC registered by user;
(3) when a calling subscriber initiates a call, a MAP (Mobile Application Part) flow of the C/D port is connected to a telecommunication network Number detection system in parallel at the C/D port, the system analyzes a MAP protocol message according to a MAP protocol flow specification, acquires a dynamic mapping relation between a MSRN (Mobile Station Roaming Number)/TLDN (temporary local Number) Number and an MSISDN (Mobile subscriber International ISDN, Mobile Station ISDN Number)/MDN (Mobile Directory Number) Number, and records the mapping relation acquired by analysis in a system memory base;
(4) at the Nc port, the SIP/BICC/ISUP flow of the Nc port is connected in series to a telecommunication network number detection system in a line series connection mode; the system analyzes the called number in the call signaling as an MSRN/TLDN number, then the system searches the mapping relation record of the MSRN/TLDN number and the MSISDN/MDN in the memory base and acquires the corresponding MSISDN/MDN number; MSISDN/MDN numbers are used in the subsequent generation of CDR detailed list records and number detection processing;
(5) and the call service processing system executes corresponding number detection processing and outputs CDR details according to the acquired MSISDN/MDN number.
Preferably, in step (3), sri (send routing information) and prn (provide routing number) operations of the MAP protocol are analyzed for the G/W network.
Preferably, in step (3), for the network C, the locreq (location request) and routreq (routing request) operations of the MAP protocol are resolved.
Preferably, in the step (3), the MAP traffic of the C/D port is connected to the number detection system of the telecommunication network in parallel by means of traffic replication and light splitting.
Preferably, the aging deletion time is set for the MSRN/TLDN number and MSISDN/MDN mapping relation record stored in the memory bank.
The invention has the beneficial effects that: the invention adopts the processing mode of combining the parallel connection of the C/D port flow and the serial connection of the Nc port flow, realizes the real-time dynamic acquisition of MSRN/TLDN number and MSISDN/MDN mapping, can process according to the real called number MSISDN/MDN when the Nc port signaling is analyzed, and has obvious operability and practical significance; from the aspect of the influence, the flow of the C/D port is in a parallel connection mode, so that the influence on the service of the C/D port is not influenced, and the influence on the existing network is reduced to the minimum.
Drawings
Fig. 1 is a schematic diagram of a mobile network call flow of the present invention.
Fig. 2 is a flow chart of the method for acquiring the real called number according to the present invention.
Detailed Description
As shown in fig. 1, the mobile call flow is generally as follows:
(1) after the mobile user accesses the current terminal office VMSC through the starting and position updating process, the HLR records the current VMSC of the user. When the calling party calls the mobile subscriber, the calling is initiated by dialing the mobile phone number MSISDN/MDN. And inquiring the VMSC of the end office where the called party is currently located from the VMSC of the calling end office or the GMSC of the calling gateway office according to the MSISDN/MDN number. Wherein the G/W network operates through SRI of MAP protocol. C network, LocReq operation by MAP.
(2) The HLR applies for a temporary dynamic roaming number from the VMSC according to the VMSC registered by the user. The G/W network applies for MSRN number through RPN operation of MAP protocol. And C, the network applies for TLDN number through Router req operation of the MAP protocol.
(3) After the calling end office VMSC/gateway office GMSC obtains the MSRN/TLDN number of the called user from HLR, the number analysis is carried out according to the MSRN/TLDN number, and the calling end office VMSC/gateway office GMSC addresses the end office VMSC where the called user is located. In the outgoing signaling, the called number fills in the MSRN/TLDN number instead of the true mobile phone number MSISDN/MDN.
(4) The call signaling carrying the MSRN/TLDN number passes through the long distance office TSS, and the call is routed to the VMSC finally. Because the MSRN/TLDN number is distributed by the VMSC, the VMSC can correspond to the MSISDN/MDN number of the specific user to realize the call signaling plane connection.
(5) And after the signaling plane routing connection is successful, the media plane negotiation is carried out. The Media plane uses flat route mode to directly establish RTP Media connection from MGW (Media Gateway) under calling VMSC/GMSC office to MGW under called VMSC.
As shown in fig. 2, a method for acquiring a real called number in a mobile network call includes the following steps:
(1) after a mobile subscriber accesses a VMSC of a current end office through a starting-up and position updating process, the current VMSC of the subscriber is recorded in an HLR, when a calling party calls the mobile subscriber, the mobile subscriber uses a mobile phone number MSISDN/MDN to dial to initiate a call, and the VMSC of the current end office of a called party is inquired from the HLR according to the MSISDN/MDN number;
(2) HLR applies temporary dynamic roaming number to VMSC according to VMSC registered by user;
(3) when a calling user initiates a call, the MAP flow of the C/D port is connected in parallel to a telecommunication network number detection system in a flow copying and light splitting mode at the C/D port, the system analyzes an MAP protocol message according to MAP protocol flow specification, acquires a dynamic mapping relation between an MSRN/TLDN number and an MSISDN/MDN number, and records the mapping relation acquired by analysis in a system memory base;
(4) at the Nc port, the SIP/BICC/ISUP flow of the Nc port is connected in series to a telecommunication network number detection system in a line series connection mode; the system analyzes the called number in the call signaling as an MSRN/TLDN number, then the system searches the mapping relation record of the MSRN/TLDN number and the MSISDN/MDN in the memory base and acquires the corresponding MSISDN/MDN number; MSISDN/MDN numbers are used in the subsequent generation of CDR detailed list records and number detection processing;
(5) and the call service processing system executes corresponding number detection processing and outputs CDR details according to the acquired MSISDN/MDN number.
In the step (3), for the G/W network, analyzing SRI and PRN operations of a MAP protocol; for the C network, LocReq and RoutetReq operations of the MAP protocol are analyzed.
Because the mapping relationship between the MSRN/TLDN number and the MSISDN/MDN number is dynamically changed, the MSRN/TLDN number and the MSISDN/MDN mapping relationship record stored in the memory base needs to set aging deletion time so as to avoid error association.
The implementation steps of the invention are as follows:
(1) an inter-office signaling SIP/BICC/ISUP protocol processing system is deployed in a long-distance office computer room, and a calling service is processed by adopting a signaling serial deployment mode.
(2) And (4) deploying an MAP signaling processing system in an HLR machine room, and processing the MAP protocol by adopting a deployment mode of parallel connection of signaling.
(3) The smooth transmission between the toll office machine room and the HLR machine room is ensured, and the MAP protocol processing system and the call service processing system can communicate and interact normally.
(4) When user initiates call, through C/D port MAP protocol flow, according to MSISDN/MDN number, applying for MSRN/TLDN number. At this time, the MAP protocol processing system analyzes the MAP protocol flow data, acquires the mapping relation between the MSISDN/MDN number and the MSRN/TLDN number of the current call, and stores the mapping relation into the memory bank of the system.
(5) The calling office routes the call to the toll office through number analysis and routing processing according to the applied MSRN/TLDN number. At this time, the call service system inquires the mapping relation record of the MSISDN/MDN number and the MSRN/TLDN number according to the MSRN/TLDN number carried by the called number, and acquires the corresponding MSISDN/MDN number.
(6) And the call service processing system executes corresponding number detection processing and outputs CDR details according to the acquired MSISDN/MDN number.
While the invention has been shown and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.
Claims (2)
1. A method for obtaining real called number in mobile network call is characterized in that the method comprises the following steps:
(1) after a mobile subscriber accesses a VMSC of a current end office through a starting-up and position updating process, the current VMSC of the subscriber is recorded in an HLR, when a calling party calls the mobile subscriber, the mobile subscriber uses a mobile phone number MSISDN/MDN to dial to initiate a call, and the VMSC of the current end office of a called party is inquired from the HLR according to the MSISDN/MDN number;
(2) HLR applies temporary dynamic roaming number to VMSC according to VMSC registered by user;
(3) when a calling user initiates a call, the MAP flow of the C/D port is connected to a telecommunication network number detection system in parallel at the C/D port, the system analyzes an MAP protocol message according to the MAP protocol flow specification, acquires the dynamic mapping relation between the MSRN/TLDN number and the MSISDN/MDN number, and records the mapping relation acquired by analysis in a system memory bank; for the G/W network, analyzing SRI and PRN operations of a MAP protocol; for the C network, analyzing LocReq and RoutetReq operations of the MAP protocol;
(4) at the Nc port, the SIP/BICC/ISUP flow of the Nc port is connected in series to a telecommunication network number detection system in a line series connection mode; the system analyzes the called number in the call signaling as an MSRN/TLDN number, then the system searches the mapping relation record of the MSRN/TLDN number and the MSISDN/MDN in the memory base and acquires the corresponding MSISDN/MDN number; MSISDN/MDN numbers are used in the subsequent generation of CDR detailed list records and number detection processing;
(5) the call service processing system executes corresponding number detection processing and outputs CDR detailed lists according to the acquired MSISDN/MDN number; and setting aging deletion time for the MSRN/TLDN number and MSISDN/MDN mapping relation record stored in the memory bank.
2. The method according to claim 1, wherein in step (3), the MAP traffic of the C/D port is connected to the number detection system of the telecommunication network by means of traffic replication and splitting.
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| CN111756931B (en) * | 2020-06-24 | 2021-04-30 | 广西东信易通科技有限公司 | Private number automatic calling test method and system based on trunk line |
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| US6920326B2 (en) * | 2000-12-05 | 2005-07-19 | Lucent Technologies Inc. | Method and apparatus for restricting call terminations when a mobile unit is roaming |
| GB2471438B (en) * | 2008-04-02 | 2012-10-10 | Vodafone Plc | Telecommunications network |
| CN101730264A (en) * | 2008-10-13 | 2010-06-09 | 华为技术有限公司 | Call screening method and system |
| CN103596156A (en) * | 2012-08-14 | 2014-02-19 | 上海粱江通信技术有限公司 | A system and a method for generating a calling detail record containing a called user number |
| CN103428686B (en) * | 2013-08-09 | 2016-11-23 | 中国移动通信集团四川有限公司宜宾分公司 | Based on Subscriber Number earth-filling method and the number backfill server of dialling calling in net mutually |
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