CN115086895A - Method and system for distinguishing abnormal provincial call ticket and abnormal roaming call ticket - Google Patents
Method and system for distinguishing abnormal provincial call ticket and abnormal roaming call ticket Download PDFInfo
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Abstract
The invention relates to a method and a system for distinguishing an abnormal provincial call ticket and an abnormal roaming call ticket. The method comprises the following steps: the visiting province CG receives a charging message request carrying a user SUPI and stores a province mark of the visiting province; the visiting province CG forwards the charging message request to the visiting province SCP, and stores the number section and province identification of each province and the mapping between the province identification and the province identification; the visiting province SCP matches the user SUPI with the number section of each province to determine the user attribution province and the province identification of the province; the SCP of the visiting province forwards a charging message request to CHF of the user attributive province; under the condition of network abnormality, the visiting province SCP returns a message response carrying an abnormal response code to the visiting province CG, and province identification of the user attributive province is added in the message response; the visiting province CG identifies an abnormal response code, judges the message response as an abnormal message response and generates an abnormal call ticket; the visiting province CG extracts the province mark from the abnormal message response and matches the province mark with the visiting province mark so as to divide the abnormal call bill into an abnormal local call bill or an abnormal roaming call bill.
Description
Technical Field
The present disclosure relates generally to the field of mobile internet operations support, and more particularly to processing an exception ticket for a mobile subscriber.
Background
In the current 5G independent networking (SA) call ticket catalog scheme, a session management function unit (SMF) of a visiting province sends a charging message request to a visiting province Charging Gateway (CG), and the visiting province CG forwards the charging message request to a user attributive province charging function unit (CHF) after receiving the charging message request. The CHF of the user home province adds its own IP address information to the Location (Location) field of the message response after receiving the charging message request, and returns the message response to the CG of the visiting province. After receiving the message response from the CHF of the user belonging province, the visiting province CG generates a ticket according to the charging message request, extracts the IP address in the position field of the message response and matches the IP address with the stored IP address of the CHF of the visiting province. If the IP address of the CHF of the user belonging province is the same as that of the CHF of the visiting province, the matching is successful, and the generated call ticket is put into the call ticket catalog of the province; otherwise, the generated call ticket is put into the roaming call ticket catalog. Compared with the scheme of distinguishing the charging message into the charging message of the user in the province or the charging message of the roaming user according to the user permanent identifier (SUPI) of the user in the charging message in the prior art, the 5G SA call ticket sub-directory scheme reduces the performance loss of an additional CG CPU (central processing unit) caused by the fact that the charging message needs to be matched with the number sections of the provinces in the whole country one by one.
However, in a network abnormal scenario, for example, if packet loss occurs during transmission or when CHF load of a province to which the user belongs is too high and the message cannot be processed, a CG in a current 5G SA call ticket catalog splitting scheme cannot receive a message response from the CHF to which the user belongs, where an IP address is carried in a location field, and therefore, only an abnormal call ticket can be generated, and it is impossible to distinguish whether the charging message is a charging message of the user of the province or a charging message of a roaming user, and therefore, the abnormal call ticket cannot be stored in the province call ticket catalog or the roaming call ticket catalog. It should be noted that the abnormal charging process and the abnormal settlement process for processing the abnormal provincial call bill and the abnormal roaming call bill are different, wherein the abnormal charging process is to collect the abnormal provincial call bill for the visiting provincial charging center to charge, and the abnormal settlement process is to collect the abnormal roaming call bill for the group settlement center to perform the roaming settlement. Because the existing 5G SA call ticket catalog dividing scheme can not store the abnormal call tickets into the provincial call ticket catalog and the roaming call ticket catalog, the charging side needs to perform additional sorting operation on the abnormal call tickets to execute the abnormal charging flow or the abnormal settlement flow, and the charging and settlement efficiency is reduced.
In order to overcome the defects, the disclosure provides an innovative method and system for distinguishing the abnormal provincial call ticket and the abnormal roaming call ticket.
Disclosure of Invention
The following presents a simplified summary of the disclosure in order to provide a basic understanding of some aspects of the disclosure. However, it should be understood that this summary is not an exhaustive overview of the disclosure. It is not intended to identify key or critical elements of the disclosure or to delineate the scope of the disclosure. Its sole purpose is to present some concepts of the disclosure in a simplified form as a prelude to the more detailed description that is presented later.
According to one aspect of the disclosure, a method for distinguishing an abnormal provincial call ticket and an abnormal roaming call ticket is provided, which comprises the following steps: the visiting province CG receives a charging message request carrying a user SUPI, wherein province identification of the visiting province is stored in the visiting province CG; the visiting province CG forwards the charging message request to a visiting province SCP, wherein the number section of each province, the province identification of each province and the mapping between the number section and the province identification of each province are stored in the visiting province SCP; the visiting province SCP matches the user SUPI with the number section of each province to determine the user attribution province and the province identification of the user attribution province; the SCP of the visiting province forwards a charging message request to CHF of the user attributive province; under the condition that the network abnormal visiting province SCP does not receive the message response carrying the IP address information of the belonging province CHF from the user belonging province CHF, the visiting province SCP sends the message response carrying the abnormal response code to the visiting province CG, and province identification of the user belonging province is added in the message response; the visiting province CG judges the message response as an abnormal message response by identifying the abnormal response code, and generates an abnormal bill according to the charging message request; and the visiting province CG extracts the province identification of the user attributive province from the abnormal message response and matches the province identification with the stored visiting province identification so as to distinguish the abnormal call ticket into an abnormal local call ticket or an abnormal roaming call ticket.
According to another aspect of the present disclosure, a system for distinguishing an abnormal province call ticket from an abnormal roaming call ticket is provided, which includes a visiting province CG configured to receive a charging message request carrying a user SUPI and forward the charging message request to an SCP of the visiting province, the visiting province CG including a province identifier storage module configured to store a province identifier of the visiting province; a call ticket determining module for receiving a response message from an SCP of the visiting province, configured to: under the condition that the message response is identified to include the abnormal response code, judging the message response as the abnormal message response, and generating an abnormal call bill according to the charging message request; extracting the province identification of the user attributive province from the abnormal message response and matching the province identification with the province identification of the visiting province so as to divide the abnormal call bill into an abnormal local call bill or an abnormal roaming call bill; the system also comprises a visiting province SCP which is connected with the visiting province CG, the visiting province CHF and SCPs of other provinces and comprises a mapping storage module which is used for storing the number section of each province, the province identification of each province and the mapping between the number section and the province identification of each province; a matching module configured to: matching the user SUPI in the charging message request received from the visiting province CG with the number section of each province stored in the mapping storage module to determine the province mark of the user attributive province and the user attributive province; and under the condition that a message response carrying the IP address information returned by the CHF of the province to which the user belongs is not received due to network abnormality, sending the message response carrying the abnormal response code to the CG of the visiting province, and adding the province identification of the province to which the user belongs in the message response.
According to yet another aspect of the present disclosure, there is provided a computer-readable storage medium comprising computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform a method according to the above-mentioned aspect of the present disclosure.
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The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:
FIG. 1 shows an overall architecture diagram of a system for distinguishing between an abnormal province call ticket and an abnormal roaming call ticket, according to an embodiment of the present disclosure;
FIG. 2 shows a flow diagram of a method of distinguishing between an abnormal province call ticket and an abnormal roaming call ticket, according to an embodiment of the disclosure; and
FIG. 3 illustrates an exemplary configuration of a computing device in which embodiments in accordance with the present disclosure may be implemented.
Detailed Description
The following detailed description is made with reference to the accompanying drawings and is provided to assist in a comprehensive understanding of various exemplary embodiments of the disclosure. The following description includes various details to aid understanding, but these details are to be regarded as examples only and are not intended to limit the disclosure, which is defined by the appended claims and their equivalents. The words and phrases used in the following description are used only to provide a clear and consistent understanding of the disclosure. In addition, descriptions of well-known structures, functions, and configurations may be omitted for clarity and conciseness. Those of ordinary skill in the art will recognize that various changes and modifications of the examples described herein can be made without departing from the spirit and scope of the disclosure.
Fig. 1 shows an overall architecture diagram of a system for distinguishing an abnormal province call ticket from an abnormal roaming call ticket according to an embodiment of the present disclosure.
The system for distinguishing the abnormal province call bill and the abnormal roaming call bill of each province nationwide (province a and province B in fig. 1) comprises a session management function unit (SMF)100, a Charging Gateway (CG)200, a service control point network element (SCP)300 and a charging function unit (CHF)400 which are in communication with each other, wherein the SCP300 of each province is connected with the SCPs 300 of other provinces. The communication between the network elements of the 5G SA core network adopts service interface communication and follows an HTTP/2 protocol stack.
In this embodiment, the a province is set as a visited province, and the visited province CG 200 forwards the charging message request to the visited province SCP300 after receiving the charging message request from the visited province SMF 100. The visiting province CG 200 comprises a province identification storage module 201 for storing the province identification of the visiting province.
The visited province SCP300 comprises a mapping storage module 301 and a matching module 302. The mapping storage module 301 is used to store the number segment of each province in the country, the province identifier of each province, and the mapping between the number segment and the province identifier of each province. The matching module 302 is configured to match the SUPI carried in the received charging message request with the number segment of each province stored in the mapping storage module 301, determine that a province is a province to which the user belongs if the SUPI is the same as a part of the number segment of one of the provinces, and determine a province identifier of the province to which the user belongs according to a mapping between the number segment of each province and the province identifier.
In a normal network scenario, if the visited province SCP300 determines that the user's home province is the visited province itself, the charging message request is directly forwarded to the CHF400 of the user's home province (i.e. the visited province itself). If the visited province SCP300 determines that the subscriber's home province is not a visited province itself, the charging message request is forwarded to the subscriber's home province SCP300 according to the matching result of the matching module 302, which is shown in fig. 1 as B province. The matching module 302 of the user-affiliated province SCP300 matches the user SUPI with the number segment of each province stored in the mapping storage module 301, and if the user SUPI is the same as a part of the number segment of the user-affiliated province, the matching is successful, and the user-affiliated province SCP300 forwards the charging message request to the user-affiliated province CHF 400.
The user home province CHF400 is configured to add its own IP address information to a location field of a message response after receiving the charging message request, and return the message response to the visiting province SCP 300.
The visiting province CG 200 also includes a ticket determination module 202. In a normal network scenario, the visited province CG 200 receives a message response from the visited province SCP300 carrying the IP address information of the user's home province CHF 400. The ticket determining module 202 is configured to receive a message response from the visiting province SCP300, compare the IP address of the CHF400 of the user's home province with the IP address of the CHF of the visiting province, and determine the generated ticket as the ticket of the current province if the IP address of the CHF of the user's home province is the same as the IP address of the CHF of the visiting province; otherwise, the generated call ticket is determined as a roaming call ticket.
However, in a scenario of network anomaly, for example, the charging message request is lost in the transmission process from the visited province SCP300 to the user home province CHF400, or the user home province CHF400 cannot process the charging message request due to too high load, and the visited province SCP300 does not receive a message response carrying its IP address information from the user home province CHF 400. The visited province SCP300 then sends a message response carrying an abnormal response code to the visited province CG 200, and adds the province identity of the user's home province determined by the matching module 302 in the location field of the message response.
The call ticket determining module 202 of the visiting province CG 200 is configured to receive a message response from the visiting province SCP300, determine that the message response is an abnormal message response when recognizing that the message response includes an abnormal response code, and generate an abnormal call ticket according to the charging message request. The ticket determining module 202 extracts the province id of the province to which the user belongs in the location field of the message response and matches the province id of the visited province stored in the province id storage module 201. And if the province mark of the province to which the user belongs is the same as the stored province mark of the visiting province, judging the generated abnormal call bill as an abnormal local province call bill, and storing the abnormal local province call bill in the abnormal local call bill list. And if the province mark of the user attribution province is different from the stored visit province mark, judging the generated abnormal call bill as an abnormal roaming call bill, and storing the abnormal roaming call bill in an abnormal roaming call bill directory.
Fig. 2 shows a flowchart of a method for distinguishing an abnormal province call ticket from an abnormal roaming call ticket according to an embodiment of the present disclosure.
In step S201, the visiting province CG receives a charging message request carrying the user SUPI from the visiting province SMF, where a province identity of the visiting province is stored in the visiting province CG.
In step S202, the visited province CG forwards the charging message request to the visited province SCP, where the number segment of each province, the province identity of each province, and the mapping between the number segment and the province identity of each province are stored in the visited province SCP.
In step S203, the visiting province SCP matches the user SUPI with the number field of each province to determine the user 'S home province and the province identity of the user' S home province.
In particular, the visiting province SCP compares the user SUPI with the number segments of each province. If the user SUPI is the same as a part of the number segment of one of the provinces, determining that the province is the user attributive province; and determining the province identification of the province to which the user belongs according to the mapping between the number segment of each province and the province identification.
In step S204, the visited province SCP forwards the charging message request to the user' S home province CHF.
In a normal network scene, the CHF of the user attribution province receives a charging message request through the SCP of the user attribution province, adds own IP address information into a position field of a message response and returns the message response to the SMF of the visiting province according to an original path. It is noted that if the user affiliation province is the visited province itself, the user affiliation province SCP is the same SCP as the visited province SCP.
However, in a network abnormal scenario, for example, the charging message request is lost during transmission from the visited province SCP to the CHF of the user-owned province, or the CHF of the user-owned province cannot process the charging message request due to a too high load, and the visited province SCP does not receive a message response carrying the IP address information of the CHF of the user-owned province from the CHF of the user-owned province.
In this case, in step S205, the visited province SCP sends a message response carrying an abnormal response code to the visited province CG, and adds the province identity of the user' S home province in the message response.
In step S206, the visiting province CG extracts the province id of the user' S affiliated province from the abnormal message response, and matches the province id with the stored visiting province id, so as to distinguish the abnormal call ticket generated based on the abnormal response code as an abnormal local call ticket or an abnormal roaming call ticket.
Specifically, the visiting province CG judges the message response as an abnormal message response by identifying the abnormal response code, and generates an abnormal bill according to the charging message request.
Specifically, under the condition that the province mark of the user attribution province is the same as the province mark of the visit province stored in the visit province CG, the visit province CG judges the generated abnormal call bill as an abnormal call bill of the local province and stores the abnormal call bill in the abnormal call bill catalog of the local province. And under the condition that the province mark of the user attribution province is different from the stored province mark of the visiting province, the visiting province CG judges the generated abnormal call bill as an abnormal roaming call bill and stores the abnormal roaming call bill in an abnormal roaming call bill directory.
According to the method and the system for distinguishing the abnormal province call tickets and the abnormal roaming call tickets, in an N40 charging interface of a 5G core network, a Service Control Point (SCP) network element is connected between a Charging Gateway (CG) and a charging function unit (CHF) in series, corresponding province identifications and mapping between the province identifications are stored on the SCP for number sections of each province in the whole country, and the province identifications of the provinces are stored in the CG. In a network abnormal scene, the visiting province SCP adds province identification of the user attribution province in a position field of abnormal message response sent to the visiting province CG, so that the visiting province CG can judge that an abnormal call bill is the province abnormal call bill or the roaming abnormal call bill by matching the province identification of the user attribution province with the stored province identification of the province, the abnormal call bill is divided into the province abnormal call bill and the roaming abnormal call bill catalog storage, and the call bill sorting flow at the charging side is reduced. According to the method and the system, the provincial charging center only needs to collect the abnormal provincial call bill for charging, and the group settlement center only needs to collect the abnormal roaming call bill for provincial settlement, so that the charging settlement efficiency is improved.
And compared with the prior art, the method and the system have the advantages that the visiting province CG does not need to match each charging message request with the number section of each province in the whole country, so that the performance loss of a CPU is reduced.
Fig. 3 illustrates an exemplary configuration of a computing device 1000 capable of implementing embodiments in accordance with the present disclosure.
Computing device 1000 is an example of a hardware device to which the above-described aspects of the disclosure can be applied. Computing device 1000 may be any machine configured to perform processing and/or computing. Computing device 1000 may be, but is not limited to, a workstation, a server, a desktop computer, a laptop computer, a tablet computer, a Personal Data Assistant (PDA), a smart phone, an in-vehicle computer, or a combination thereof.
As shown in fig. 3, computing device 1000 may include one or more elements that may be connected to or communicate with bus 1002 via one or more interfaces. Bus 1002 can include, but is not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MCA) bus, an enhanced ISA (eisa) bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus, to name a few. Computing device 1000 may include, for example, one or more processors 1004, one or more input devices 1006, and one or more output devices 1008. The one or more processors 1004 may be any kind of processor and may include, but are not limited to, one or more general-purpose processors or special-purpose processors (such as special-purpose processing chips). The processor 1004 may, for example, implement the functions of the various constituent elements of the system shown in FIG. 1. Input device 1006 may be any type of input device capable of inputting information to a computing device and may include, but is not limited to, a mouse, a keyboard, a touch screen, a microphone, and/or a remote control. Output device 1008 may be any type of device capable of presenting information and may include, but is not limited to, a display, speakers, a video/audio output terminal, a vibrator, and/or a printer.
The computing device 1000 may also include or be connected to a non-transitory storage device 1014, which non-transitory storage device 1014 may be any non-transitory storage deviceStorage devices that are state and that may enable data storage, and may include, but are not limited to, disk drives, optical storage devices, solid state memory, floppy disks, flexible disks, hard disks, magnetic tape, or any other magnetic medium, compact disks or any other optical medium, cache memory and/or any other memory chip or module, and/or any other medium from which a computer may read data, instructions and/or code. Computing device 1000 may also include Random Access Memory (RAM)1010 and Read Only Memory (ROM) 1012. The ROM 1012 may store programs, utilities or processes to be executed in a nonvolatile manner. The RAM 1010 may provide volatile data storage, and store instructions related to the operation of the computing device 1000. Computing device 1000 may also include a network/bus interface 1016 that couples to a data link 1018. The network/bus interface 1016 may be any kind of device or system capable of enabling communication with external devices and/or networks, and may include, but is not limited to, a modem, a network card, an infrared communication device, a wireless communication device, and/or a chipset (such as bluetooth) TM Devices, 802.11 devices, WiFi devices, WiMax devices, cellular communications facilities, etc.).
The present disclosure may be implemented as any combination of apparatus, systems, integrated circuits, and computer programs on non-transitory computer readable media. One or more processors may be implemented as an Integrated Circuit (IC), an Application Specific Integrated Circuit (ASIC), or a large scale integrated circuit (LSI), a system LSI, or a super LSI, or as an ultra LSI package that performs some or all of the functions described in this disclosure.
The present disclosure includes the use of software, applications, computer programs or algorithms. Software, applications, computer programs, or algorithms may be stored on a non-transitory computer readable medium to cause a computer, such as one or more processors, to perform the steps described above and depicted in the figures. For example, one or more memories store software or algorithms in executable instructions and one or more processors may associate a set of instructions to execute the software or algorithms to provide various functionality in accordance with embodiments described in this disclosure.
Software and computer programs (which may also be referred to as programs, software applications, components, or code) include machine instructions for a programmable processor, and may be implemented in a high-level procedural, object-oriented, functional, logical, or assembly or machine language. The term "computer-readable medium" refers to any computer program product, apparatus or device, such as magnetic disks, optical disks, solid state storage devices, memories, and Programmable Logic Devices (PLDs), used to provide machine instructions or data to a programmable data processor, including a computer-readable medium that receives machine instructions as a computer-readable signal.
By way of example, computer-readable media can comprise Dynamic Random Access Memory (DRAM), Random Access Memory (RAM), Read Only Memory (ROM), electrically erasable read only memory (EEPROM), compact disk read only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to carry or store desired computer-readable program code in the form of instructions or data structures and which can be accessed by a general-purpose or special-purpose computer or a general-purpose or special-purpose processor. Disk or disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.
The subject matter of the present disclosure is provided as examples of apparatus, systems, methods, and programs for performing the features described in the present disclosure. However, other features or variations are contemplated in addition to the features described above. It is contemplated that the implementation of the components and functions of the present disclosure may be accomplished with any emerging technology that may replace the technology of any of the implementations described above.
Additionally, the above description provides examples, and does not limit the scope, applicability, or configuration set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the spirit and scope of the disclosure. Various embodiments may omit, substitute, or add various procedures or components as appropriate. For example, features described with respect to certain embodiments may be combined in other embodiments.
Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In some cases, multitasking and parallel processing may be advantageous.
Claims (10)
1. A method for distinguishing an abnormal provincial call ticket and an abnormal roaming call ticket comprises the following steps:
a visiting province charging gateway CG receives a charging message request carrying a user permanent identifier SUPI, wherein a province mark of the visiting province is stored in the visiting province CG;
the visiting province CG forwards the charging message request to a visiting province Service Control Point (SCP), wherein a number section of each province, a province identifier of each province and mapping between the number section and the province identifier of each province are stored in the visiting province SCP;
the visiting province SCP matches the user SUPI with the number section of each province to determine the user attribution province and the province identification of the user attribution province;
the visiting province SCP transmits a charging message request to a CHF (gateway F) of a user attribution province charging function unit;
under the condition that the network abnormal visiting province SCP does not receive the message response carrying the IP address information of the belonging province CHF from the user belonging province CHF, the visiting province SCP sends the message response carrying the abnormal response code to the visiting province CG, and province identification of the user belonging province is added in the message response; and
the visiting province CG extracts province identification of the user attributive province from the message response and matches the province identification with the stored visiting province identification so as to divide the abnormal call bill generated based on the abnormal response code into an abnormal local call bill or an abnormal roaming call bill.
2. The method of claim 1, wherein the visiting province SCP matching the user SUPI with the number segment of each province to determine the user home province and the province identity of the user home province comprises:
SCP compares user SUPI with number segment of each province;
if the user SUPI is the same as a part of the number segment of one of the provinces, determining that the province is the user attributive province; and is
And determining the province identification of the province to which the user belongs according to the mapping between the number section of each province and the province identification.
3. The method of claim 1 or 2, wherein the step of the visiting province CG matching the extracted province identification of the user attribution province with the stored province identification of the visiting province to distinguish the abnormal call ticket as an abnormal local province call ticket or an abnormal roaming call ticket comprises the following steps:
under the condition that the extracted province mark of the user attribution province is the same as the stored province mark of the visiting province, the visiting province CG judges the generated abnormal call bill as an abnormal local province call bill, stores the abnormal local province call bill in a call bill list of the abnormal local province, and
and under the condition that the extracted province mark of the user attribution province is different from the stored visit province mark, the visit province CG judges the generated abnormal call bill as an abnormal roaming call bill and stores the abnormal roaming call bill in an abnormal roaming call bill directory.
4. The method according to claim 1 or 2, wherein in a normal scenario of the network, the user's home province CHF adds its own IP address information to the location field of the message response after receiving the charging message request and returns the message response to the visited province SCP.
5. The method according to claim 1 or 2, wherein the visiting province CG judges the message response as an abnormal message response by identifying the abnormal response code, and generates an abnormal call ticket according to the charging message request.
6. The method according to claim 1 or 2, wherein the visited province SCP adds a province identity of the user's home province in the location field of the message response carrying the abnormal response code sent to the visited province CG.
7. A system for distinguishing between an abnormal provincial call ticket and an abnormal roaming call ticket, comprising:
a visiting province charging gateway CG for receiving a charging message request carrying a user permanent identifier SUPI and forwarding the charging message request to a Service Control Point (SCP) of the visiting province, comprising:
the province identification storage module is used for storing the province identification of the visiting province;
a call ticket determining module for receiving a response message from an SCP of the visiting province, configured to:
under the condition that the message response is identified to include the abnormal response code, judging the message response as the abnormal message response, and generating an abnormal call bill according to the charging message request; and
extracting the province identification of the user attributive province from the abnormal message response and matching the province identification with the province identification of the visiting province so as to divide the abnormal call bill into an abnormal local call bill or an abnormal roaming call bill;
the visiting province SCP is connected with the visiting province CG, the visiting province charging function unit CHF and SCPs of other provinces and comprises the following steps:
the mapping storage module is used for storing the number section of each province, the province identification of each province and the mapping between the number section and the province identification of each province;
a matching module configured to:
matching the user SUPI in the charging message request received from the visiting province CG with the number section of each province stored in the mapping storage module to determine the province mark of the user attributive province and the user attributive province; and
and under the condition that a message response carrying the IP address information returned by the CHF of the user attribution province is not received due to network abnormality, sending the message response carrying the abnormal response code to the CG of the visiting province and adding the province identification of the user attribution province in the message response.
8. The system of claim 7, further comprising:
and the CHF is used for receiving a charging message request from the SCP under a normal network scene, and returning a message response carrying the IP address information of the CHF to the visiting province CG through the SCP.
9. The system of claim 7 or 8, further comprising:
a visited province session management function unit SMF connected to the visited province CG for sending a charging message request to the visited province CG and receiving a message response from the visited province CG.
10. A computer-readable storage medium comprising computer-executable instructions that, when executed by one or more processors, cause the one or more processors to perform the method of any one of claims 1-6.
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