CN117295050A

CN117295050A - Cross-operator tracing method and system

Info

Publication number: CN117295050A
Application number: CN202311038985.2A
Authority: CN
Inventors: 许浩; 曲旻杰
Original assignee: China Telecom Group Trade Union Shanghai Committee
Current assignee: China Telecom Group Trade Union Shanghai Committee
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2023-12-26

Abstract

The invention provides a cross-operator tracing method and a system, wherein the method comprises the following steps: when receiving a broadband access message from a user terminal and judging that the broadband access message belongs to broadband access equipment of a second operator, the first evolved packet data gateway generates a position inquiry instruction according to the broadband access message and sends the position inquiry instruction to a second tracing gateway; the second tracing gateway forwards the position inquiry instruction to the second tracing system and receives the first inquiry response information fed back by the second tracing system; the second tracing gateway generates position inquiry response information according to the first inquiry response information and feeds back the position inquiry response information to the first evolution type packet data gateway, and the first evolution type packet data gateway carries out network tracing according to the position inquiry response information. The beneficial effects are that: and the network architecture of the shared party tracing gateway is built by docking the extension interface of the evolution type packet data gateway, so that the VoWiFi service tracing accessed across operators is realized.

Description

Cross-operator tracing method and system

Technical Field

The invention relates to the technical field of network tracing, in particular to a cross-operator tracing method and system.

Background

Wireless network coverage has been a challenge in high density urban residential areas and marginal rural areas because of the significant human, material and financial investment required. Operators are looking for an economical and efficient way of wireless access to quickly supplement network coverage.

With the advancement of urban digital transformation and village communication engineering, wiFi has been widely used in various fields including personal wireless routers, business center access hotspots, rural home routers, and the like. Currently, about 70% of the user's conversational activity occurs indoors, especially in residential homes, and indoor coverage is therefore critical. Compared with coverage enhancement schemes such as indoor subsystem and Small Cell, the method for using WiFi to solve the problem of weak coverage of operators in urban residences, remote rural areas and other areas is an economical and effective coverage mode. Smooth traffic experience can be provided through bi-directional seamless handover with a mobile cellular network. According to the definition of 3GPP and different mobility management protocols adopted, the networking modes of VoWiFi (operators provide voice services for users by utilizing WiFi hotspots) mainly comprise a trust domain access scheme, a non-trust domain access scheme and a direct connection IP multimedia subsystem (IP Multimedia Subsystem, IMS) access scheme.

Additionally, co-building sharing of operator network infrastructure is also an efficient way to save time and cost. This approach was first proposed by european operators and, after approval by regulatory authorities, operators in many countries began to seek partners to perform network sharing. Especially after the advent of the 4G and 5G age, co-established sharing has presented a strong development situation worldwide.

S2b is an interface protocol for connecting a user equipment (e.g. a smart phone) and an evolved packet data gateway (Evolevd Packet Data Gateway, ePDG) in a VoWiFi system. Such interfaces allow devices to communicate over the public internet or private networks so that users can conduct voice calls and data transmissions over WiFi networks where there is no coverage of the mobile network. When the user dials VoWiFi, the user terminal UE accesses the core network through ePDG (5 GC/EPC,5GC is 5G core network, EPC is 4G core network). However, voWiFi is different from VoNR/long term evolution voice bearer VoLTE applied by high definition video call, and is not accessed through a base station (gNodeB/eNodeB) during VoWiFi call, so that the base station and a cell cannot be used for identifying the position of the VoWiFi, so how to trace the position in the VoWiFi environment becomes a technical problem to be overcome by a person skilled in the art.

Disclosure of Invention

In order to solve the technical problems, the invention provides a cross-operator tracing method and a system.

The technical problems solved by the invention can be realized by adopting the following technical scheme:

a cross-operator tracing method comprises a first evolution type packet data gateway for receiving broadband access information from a user terminal, a second tracing gateway connected with the first evolution type packet data gateway, and a second tracing system connected with the second tracing gateway; the first evolution type packet data gateway is located in a first operator, and the second tracing gateway and the second tracing system are both located in a second operator;

the method comprises the following steps:

when receiving a broadband access message from a user terminal and judging that the broadband access message belongs to broadband access equipment of the second operator, the first evolved packet data gateway generates a position inquiry instruction according to the broadband access message and sends the position inquiry instruction to the second traceability gateway;

the second traceability gateway forwards the position inquiry instruction to the second traceability system and receives first inquiry response information fed back by the second traceability system based on the position inquiry instruction;

the second tracing gateway generates position inquiry response information aiming at the position inquiry instruction according to the first inquiry response information, and feeds the position inquiry response information back to the first evolution type packet data gateway, and the first evolution type packet data gateway carries out network tracing according to the position inquiry response information.

Preferably, the broadband access message includes an IP address and a port number of the user terminal for the broadband access device;

and the first evolution type packet data gateway is used for generating a position inquiry instruction containing the IP address and the port number when judging that the broadband access message belongs to the broadband access equipment of the second operator according to the IP address.

Preferably, the method further comprises:

when the second traceability system receives the position inquiry command forwarded by the second traceability gateway, judging whether to sign up VoWiFi service:

if yes, feeding back the first query response information containing the subscription information identification;

if not, feeding back the first query response information containing the sign of the non-subscription information.

Preferably, the generating, by the second tracing gateway, location query response information for the location query instruction according to the first query response information includes:

the second tracing gateway judges whether the first inquiry response information contains a subscription information identifier:

if yes, generating first response information responding to the subscription information identification;

if not, generating second response information responding to the sign of the non-subscription information;

the location query response information includes the first response information or the second response information.

Preferably, the first evolved packet data gateway is in communication connection with the second traceability gateway through a simple workflow service interface; and

the second tracing gateway is in communication connection with the second tracing system through a peripheral interface.

The invention also provides a cross-operator tracing system for implementing the cross-operator tracing method, which comprises a first evolution type packet data gateway for receiving the broadband access message from the user terminal, a second tracing gateway connected with the first evolution type packet data gateway, and a second tracing system connected with the second tracing gateway; the first evolution type packet data gateway is located in a first operator, and the second tracing gateway and the second tracing system are both located in a second operator;

the first evolved packet data gateway is configured to generate a location query instruction according to the broadband access message when receiving the broadband access message from the user terminal and determining that the broadband access message belongs to the broadband access device of the second operator, and send the location query instruction to the second tracing gateway;

the second tracing gateway is used for forwarding the position inquiry instruction to the second tracing system and receiving first inquiry response information fed back by the second tracing system based on the position inquiry instruction;

the second tracing gateway is configured to generate location query response information for the location query instruction according to the first query response information, and feed back the location query response information to the first evolved packet data gateway, where the first evolved packet data gateway performs network tracing according to the location query response information.

Preferably, the second tracing system is further configured to determine whether to sign up a VoWiFi service when receiving the location query instruction forwarded by the second tracing gateway: if the VoWiFi service is signed, feeding back the first query response information containing the sign of the signing information; if the VoWiFi service is not signed, feeding back the first query response information containing the sign of the non-signed information.

Preferably, the second tracing gateway is configured to determine whether the first query response information includes a subscription information identifier: if the subscription information identifier is contained, generating first response information responding to the subscription information identifier; otherwise, generating second response information responding to the sign of the non-subscription information;

The technical scheme of the invention has the advantages that:

according to the invention, the network architecture of the shared party tracing gateway and the extension interface docking method based on the evolution type packet data gateway realizes the tracing of the VoWiFi service accessed across operators, and the risk of core user data leakage caused by direct docking of the shared fixed network AAA/tracing system can be avoided; the network is simple, no new query step is needed, no sense is brought to the use of the user, the tracing precision can reach the home, the tracing precision is higher than the voice bearing VoLTE of long term evolution, and the supervision requirement is met.

Drawings

Fig. 1 is a diagram of an overall architecture of a VoWiFi service in the prior art;

FIG. 2 is a block diagram of a single operator traceability system according to the prior art;

FIG. 3 is a block diagram of a cross-operator traceability system according to a preferred embodiment of the present invention;

FIG. 4 is a flow chart illustrating implementation of a cross-operator tracing method according to a preferred embodiment of the present invention;

FIG. 5 is a schematic flow chart of a cross-operator tracing method in a preferred embodiment of the present invention;

fig. 6 is a schematic diagram of a protocol stack according to a preferred embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.

In the prior art, according to the 4G and 5G interworking architecture defined by 3gpp ts23.501 (System Architecture for the G System), the overall architecture of the VoWiFi service is shown in fig. 1, and fig. 1 is a schematic diagram aiming at the architecture of the VoWiFi service in the prior art.

For single-operator VoWiFi service, the prior art is based on the basic scheme of S2b to make a component tracing architecture. Referring to fig. 2, fig. 2 is a schematic diagram of a single operator traceability system of a VoWiFi service, through an SWf interface newly added and extended on an ePDG side, the ePDG obtains location information of a user currently accessing a home gateway from the traceability gateway through the interface, and the location information is used to represent user location information. And adding an API (Application Programming Interface ) of RESTful style in a fixed network AAA (Authentication, authorization and Accounting)/traceability system, wherein the RESTful style can be the style of resource positioning and resource operation in network application. The tracing gateway can acquire the home gateway administrative area coding information and the home broadband account information which are accessed by the user currently from the fixed network AAA/tracing system through the API.

Therefore, one of the important inventions of the embodiments of the present invention is how to trace the location of the cross-operator in the VoWiFi environment. The embodiment of the invention aims to draw a cross-operator tracing method based on an expansion interface under the co-building sharing scene by referring to the 3GPP international standard, realizes the cross-operator tracing of the VoWiFi, gives consideration to the requirements of user perception and supervision, and has great significance on the co-building sharing of the VoWiFi in China.

Example 1

Referring to fig. 3, fig. 3 is an architecture diagram of a cross-operator tracing system provided in an embodiment of the present invention, and a cross-operator VoWiFi tracing architecture is formulated based on a tracing scheme of a single operator. The inter-operator traceability system comprises a first evolution type packet data gateway, a first traceability gateway and a first traceability system which are positioned in a first operator, and a second evolution type packet data gateway, a second traceability gateway and a second traceability system which are positioned in a second operator.

The first evolution type packet data gateway, the first tracing gateway and the second tracing gateway perform data interaction through a simple workflow service interface SWf; and

and the second evolution type packet data gateway, the first tracing gateway and the second tracing gateway perform data interaction through a simple workflow service interface SWf.

The first tracing gateway performs data interaction with a first fixed network AAA/tracing system through a peripheral interface (Peripheral Interface, PI); the second tracing gateway performs data interaction with a second fixed network AAA/tracing system through a PI interface;

in a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, a cross-operator tracing method is now provided, as shown in fig. 4, where the method includes:

s1, when broadband access information from a user terminal is received and the broadband access information is judged to belong to broadband access equipment of a second operator, a first evolution packet data gateway generates a position inquiry instruction according to the broadband access information and sends the position inquiry instruction to a second tracing gateway;

s2, the second tracing gateway forwards the position inquiry instruction to the second tracing system and receives first inquiry response information fed back by the second tracing system based on the position inquiry instruction;

s3, the second tracing gateway generates position inquiry response information aiming at the position inquiry instruction according to the first inquiry response information, and feeds the position inquiry response information back to the first evolution type packet data gateway, and the first evolution type packet data gateway carries out network tracing according to the position inquiry response information.

Specifically, in this embodiment, when a broadband access message from a user terminal is received and it is determined that the message belongs to a broadband access device of a second operator, the first evolved packet data gateway generates a location query instruction according to the message and sends the instruction to the second tracing gateway. And the second tracing gateway forwards the position inquiry instruction to the second tracing system and receives the first inquiry response information fed back by the second tracing system based on the position inquiry instruction. And then, the second traceability gateway generates position inquiry response information aiming at the position inquiry instruction according to the first inquiry response information, and feeds back the response information to the first evolution type packet data gateway. And finally, the first evolution type packet data gateway performs network tracing according to the position inquiry response information.

The embodiment of the invention provides that the extension interface based on the evolution type packet data gateway is used for being in butt joint with the local and co-building sharing party traceability gateway, the cross-operator butt joint is realized through a single interface, the cross-operator position information is transferred, the safety and the controllability are realized, the direct butt joint of the co-building sharing fixed network AAA/traceability system can be avoided, the core user data leakage risk is caused, and the VoWiFi service traceability of the cross-operator access under the condition of not involving the core user data of the operator in the co-building sharing scene is realized; the method has the advantages of simple tracing and networking, no need of newly added query steps, no sense of use for users, higher tracing precision than VoLTE and capability of meeting supervision requirements.

As a preferred embodiment, the broadband access message includes an IP address and a port number of the user terminal for the broadband access device;

the first evolved packet data gateway is configured to generate a location query instruction including an IP address and a port number when determining that the broadband access message belongs to the broadband access device of the second operator according to the IP address.

Specifically, in this embodiment, the attribution of the access broadband operator is determined through the IP address, and complex data comparison and processing are not required, so that the processing efficiency is greatly improved, and the implementation is fast and simple. The tracing scheme is realized by using the broadband access message reported by the user terminal, has no sense to the user and improves the user experience.

Furthermore, the IP address identification capability is newly added on the ePDG side in the traceability architecture of different operators to distinguish the access broadband information of different operators. The ePDG side is connected to the tracing gateway of the local and the co-building sharing party, and the ePDG acquires the position information of the current access home gateway of the user from the tracing gateway of the local and the co-building sharing party by adopting the extended SWf interface, so as to represent the position information of the user.

Further, if the evolved packet data gateway determines that the address is the present address according to the IP address, tracing is performed according to a single operator tracing method, which is not described herein again; if the shared party address is judged to be the co-established shared party address, tracing is carried out according to the cross-operator tracing method.

As a preferred embodiment, the method further comprises:

when receiving a position inquiry instruction forwarded by the second tracing gateway, the second tracing system judges whether to sign up the VoWiFi service:

if yes, feeding back first query response information containing the subscription information identification;

if not, the first query response information containing the sign of the non-subscription information is fed back.

Specifically, in this embodiment, by determining whether the user signs up for the VoWiFi service, and then generating the corresponding first query response information, the location query requests of the users who sign up for the VoWiFi service and those who do not sign up for the VoWiFi service can be effectively distinguished and processed, so that accuracy and efficiency of location query are improved, and convenience is provided for popularization and application of the VoWiFi service.

As a preferred embodiment, the generating, by the second tracing gateway, location query response information for the location query instruction according to the first query response information includes:

Specifically, in this embodiment, by determining whether the first query response information includes the subscription information identifier, and then generating corresponding response information, the query result can be reflected more accurately, the query efficiency is improved, and meanwhile, the working efficiency and accuracy of the tracing gateway can also be improved.

As a preferred embodiment, the first evolved packet data gateway is in communication connection with the second tracing gateway through a simple workflow service interface; and

Further, the first evolution type packet data gateway is in communication connection with the first tracing gateway and the second tracing gateway through a simple workflow service interface SWf; and

the second evolution type packet data gateway is in communication connection with the first tracing gateway and the second tracing gateway through a simple workflow service interface SWf.

Specifically, in this embodiment, the ePDG interfaces with the tracing gateway of the present invention and the tracing gateway of the co-established sharing party based on the SWf, and performs networking data interaction, so as to avoid the risk of core user data leakage caused by direct interfacing of the co-established and shared fixed network AAA/tracing system, and realize VoWiFi service tracing across operators without involving operator core user data.

In order that those skilled in the art will better understand the embodiments of the present invention, a complete example will be described below.

In the user attachment process, the ePDG interacts with the tracing gateway of the co-building sharing party through the expanded SWf interface, and obtains the location information of the home gateway currently accessed by the user from the fixed network, so as to represent the location information of the user, and the specific process can refer to fig. 5, and the tracing process is as follows:

1) And according to the reported Local IP of the user, the ePDG (A) judges that the address is the address of the user or the address of the co-established sharing party. If the shared party address is the co-established shared party address, the ePDG sends a Diameter protocol-based Location Query instruction Query-Location-Request to a co-established shared party traceability gateway (B). In some embodiments, the Query-Location-Request includes a Local IP of the user (i.e., an IP address of the ue for the broadband access device) for querying Location information of the user. Further, the Query-Location-Request instruction may further include a port number, an IMSI/MSISDN, etc.

2) The co-established sharing party tracing gateway (B) forwards a Query Request message based on a hypertext transfer protocol (Hyper Text Transfer Protocol, HTTP)/security-targeted HTTP channel (Hypertext Transfer Protocol Secure, HTTPS) protocol to the co-established sharing party fixed network AAA/tracing system (B). In some embodiments, the Query Request message contains the user Local IP. Further, the Query Request message may further include a port number.

3) And the co-building sharing party fixed network AAA/tracing system (B) returns first Query Response information Query Response. In some embodiments, if the VoWiFi service is subscribed, the first Query Response information Query Response includes a subscription information identifier. Furthermore, the first Query Response information Query Response may further include user administrative area information and home broadband account information. In some embodiments, if the VoWiFi service is not subscribed, the first Query Response information Query Response returned by the fixed network AAA/tracing system (B) includes an identifier of the non-subscribed information.

4) If the first Query Response information Query Response carries the subscription information identifier, the Location Query Response information Query-Location-Answer returned by the traceable gateway (B) to the ePDG (A) contains the "Success" identifier and the Access-Network-Info AVP carrying the user Location information. Further, if the first Query Response information Query Response carries an unsigned information identifier, the Location Query Response information Query-Location-Answer returned by the tracing gateway (B) to the ePDG (a) includes a "diameter_error_location_failure" identifier, and then the ePDG (a) returns a "network_failure" and a back-off_timer in an ike_authanswer message of the answering user terminal UE, and the attachment procedure is terminated.

The inter-operator tracing method is the same as a single-operator scheme, can precisely trace the source to the home address, and has higher precision than VoLTE.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a protocol stack according to an embodiment of the present invention, where on a control plane, user tracing may be implemented through an SWf interface and a PI interface. And the transmission layer of the PI interface uses a TCP protocol on the SWf interface of the ePDG and the tracing gateway through Diameter message interaction position tracing information.

In some embodiments, the ePDG queries the home gateway location information to the home or co-established sharer traceable gateway through the SWf interface. The interface messages are classified as QLR. QLR command messages are sent by the ePDG (a) to the tracing gateway (B) for querying the location information of the home gateway accessed by the VoWiFi user.

Illustratively, the message format of the Location Query instruction Query-Location-Request may be:

<Query-Location-Request>::＝<Diameter Header:8388739,REQ,PXY,16777361>

<Session-Id>

[DRMP]

[Vendor-Specific-Application-Id]

{Auth-Session-State}

{Origin-Host}

{Origin-Realm}

[Destination-Host]

{Destination-Realm}

*[Subscription-Id]

[OC-Supported-Features]

*[Supported-Features]

{UE-Local-IP-Address}

{UDP-Source-Port}

*[Proxy-Info]

*[Route-Record]

*[AVP]

furthermore, the subscriber-Id AVP carries an international mobile subscriber identity IMSI/mobile station international subscriber directory number MSISDN, which facilitates statistics by the diameter routing agent DRA or the tracing gateway.

Further, the UE-Local-IP-Address AVP and UDP-Source-Port AVP carry the Local IP and Port number of the user (i.e. the exit IP Address and Port number of the home gateway), and the format specification is referred to 3gpp ts29.212.

In some embodiments, the tracing gateway (B) queries the home broadband account information, home gateway city/administrative district fields, etc. that the user currently accesses to the home fixed network AAA/tracing system (B) through an API interface. In some embodiments, the tracing gateway (B) generates a Query Request message containing the Local IP and the port number of the user and forwards the Query Request message to the fixed network AAA/tracing system (B) after receiving the Location Query command Query-Location-Request.

Optionally, the embodiment of the invention can replace a tracing system by using the fixed network AAA equipment.

Illustratively, the message format of the Query Request message may be:

GET

/NocBroadbandRestfulWs/VoWiFiService/VoWiFiPositionQuery/ip/xx.xx.xx.xx/port/xxxx

or alternatively

/NocBroadbandRestfulWs/VoWiFiService/VoWiFiPositionQueryip＝xx.xx.xx.xx&port＝xxxx

Content-Type:application/json

In some embodiments, the fixed network AAA/trace-source system (B) returns the first Query Response message Query Response to the trace-source gateway (B) based on the Query Request message.

Illustratively, the first Query Response information Query Response may be:

200

{

"login":"xxxxxxxx",

"ip":"xx.xx.xx.xx",

"port":"xxxx",

"position":"xx",

"resCode":"0",

"resInfo":"Success！"

}

in some implementations, the API interface uses standard HTTP exception and response codes as error handling.

In some embodiments, the QLA command message is sent to the ePDG (a) by the traceable gateway (B), and if the query is successful, the location information of the home gateway is returned through the Access-Network-Info AVP; if the query fails, a failure response is returned through the Experimental-Result AVP.

Illustratively, the message format of the Location Query response information Query-Location-Answer may be:

<Query-Location-Answer>::＝<Diameter Header:8388739,PXY,16777361>

<Session-Id>

[DRMP]

[Vendor-Specific-Application-Id]

[Result-Code]

[Experimental-Result]

[Error-Diagnostic]

{Auth-Session-State}

{Origin-Host}

{Origin-Realm}

[OC-Supported-Features]

[OC-OLR]

*[Supported-Features]

[Access-Network-Info]

*[Failed-AVP]

*[Proxy-Info]

*[Route-Record]

*[AVP]

Access-Network-Info::＝<AVP Header:1526 10415>

[SSID]

[BSSID]

[Location-Information]

[Location-Data]

[Operator-Name]

[Logical-Access-ID]

*[AVP]

further, only Result-Code AVP needs to be filled in for successful inquiry, and 2001 'success' needs to be filled in; the query failure only needs to fill in the superior-Result AVP, the Vendor-Id AVP fill 10415 in the superior-Result AVP represents 3gpp, and the superior-Result-Code AVP fill 4225 represents "diameter_error_position_failure".

Further, the Code value in the Access-Network-Info AVP format is set to 0 (indicating that the Location-Data AVP carries Location Information in civic Location profile format) as shown in 3GPP TS 29.273,Location-Information AVP, and the Location-Data AVP carries Location Information of the home gateway ("administrative area code+country code+local area code+province tag" +operator identifier+networking mode). For the VoWiFi application in the chinese telecom home gateway scenario, SSID AVP fills in "chinanet-home".

Further, where QLA defaults to not carry the Vendor-Specific-Application-Id AVP, the AVP return must also be carried in the QLA message only if the Vendor-Specific-Application-Id AVP is carried in the QLR request.

In the above manner, assuming that the user a is the user of the operator X, the user a dials the VoWiFi service, and the location tracing includes the following steps through broadband access of the operator Y:

inquiring DNS according to FQDN reported by the terminal, and acquiring ePDG address of operator X; the ePDG of the operator X judges that the ePDG is a broadband of the operator Y according to the address, and the ePDG of the operator X performs position inquiry to a tracing gateway of the operator Y; the tracing gateway of the operator Y performs position inquiry to the fixed network AAA/tracing system of the operator Y, acquires broadband position information after the internal inquiry of the tracing gateway of the operator Y, and feeds back the broadband position information to the tracing gateway of the operator Y; and the tracing gateway of the operator X feeds back to the ePDG of the operator X, so that the VoWiFi user tracing of the user A is realized.

It should be noted that, in the embodiment of the present invention, an evolved packet data gateway that receives a broadband access message of a user terminal UE is taken as a first evolved packet data gateway located in a first operator, and tracing is performed. The method includes the steps that equipment under a traceability architecture of a first operator, such as a first evolution packet data gateway, a first traceability gateway and a first traceability system; the co-established sharer represents a device under the traceability architecture of the second operator. On this basis, it is assumed that the second evolved packet data gateway located in the second operator receives the broadband access message of the UE, and the corresponding tracing steps are similar to those described above, and are not repeated here.

Example two

The invention also provides a cross-operator tracing system, which is used for implementing the cross-operator tracing method, and comprises a first evolution type packet data gateway, a first tracing gateway and a first tracing system which are positioned in a first operator, and a second evolution type packet data gateway, a second tracing gateway and a second tracing system which are positioned in a second operator;

the first evolved packet data gateway is used for generating a position inquiry instruction according to the broadband access message when receiving the broadband access message from the user terminal and judging that the broadband access message belongs to the broadband access equipment of the second operator, and sending the position inquiry instruction to the second tracing gateway;

the second tracing gateway is used for forwarding the position inquiry command to the second tracing system and receiving first inquiry response information fed back by the second tracing system based on the position inquiry command;

the second tracing gateway is used for generating position inquiry response information aiming at the position inquiry instruction according to the first inquiry response information, feeding the position inquiry response information back to the first evolution type packet data gateway, and carrying out network tracing by the first evolution type packet data gateway according to the position inquiry response information.

As a preferred embodiment, the second tracing system is further configured to determine, when receiving a location query instruction forwarded by the second tracing gateway, whether to sign up for a VoWiFi service: if the VoWiFi service is signed, feeding back first query response information containing the sign of the signing information; if the VoWiFi service is not signed, the first query response information containing the sign of the non-signed information is fed back.

As a preferred embodiment, the second tracing gateway is configured to determine whether the first query response information includes a subscription information identifier: if the subscription information identifier is contained, generating first response information responding to the subscription information identifier; otherwise, generating second response information responding to the sign of the non-subscription information;

With respect to more implementation details of the system, a method is already disclosed, and this embodiment will not be repeated.

The technical scheme has the advantages that:

1) The networking architecture of the shared party tracing gateway is built by docking the method and the shared party tracing gateway based on the expansion interface of the ePDG, so that the cross-operator accessed VoWiFi service tracing is realized, the cross-operator position information is transferred, the core user data leakage risk caused by direct docking of the shared fixed network AAA/tracing system can be avoided, and the cross-operator VoWiFi service tracing is realized under the condition of not involving the core user data of the operator;

2) Based on the networking architecture of the tracing gateway of the ePDG interfacing method and the co-established sharing party, tracing information such as business flow, interface, message and the like.

3) The ePDG interacts with the method and the co-established sharing party traceability gateway, so that networking is relatively simple, and interaction logic is simple and networking is simple;

4) No new query step is needed, and the tracing query flow of the method and the co-building sharing party is consistent, so that the method is free from sense of use of users.

5) Meanwhile, the cross-operation VoWiFi traceability network scheme has the advantages that the traceability precision can reach families, the traceability precision is higher than that of the long-term evolution voice bearing VoLTE, and the supervision requirement is met.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the embodiments and scope of the present invention, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations herein, which should be included in the scope of the present invention.

Claims

1. The inter-operator tracing method is characterized by comprising a first evolution type packet data gateway, a second tracing gateway and a second tracing system, wherein the first evolution type packet data gateway is used for receiving broadband access messages from a user terminal, the second tracing gateway is connected with the first evolution type packet data gateway, and the second tracing system is connected with the second tracing gateway; the first evolution type packet data gateway is located in a first operator, and the second tracing gateway and the second tracing system are both located in a second operator;

the method comprises the following steps:

2. The cross-operator tracing method according to claim 1, wherein said broadband access message comprises an IP address and a port number of said user terminal for a broadband access device;

3. The cross-operator tracing method of claim 1, further comprising:

4. The cross-operator tracing method of claim 1, wherein said second tracing gateway generating location query response information for said location query instruction from said first query response information comprises:

5. The cross-operator tracing method of claim 1, wherein said first evolved packet data gateway and said second tracing gateway are communicatively connected by a simple workflow service interface; and

6. A cross-operator tracing system for implementing the cross-operator tracing method of any one of claims 1-5, comprising a first evolved packet data gateway for receiving broadband access messages from user terminals, a second tracing gateway connected to the first evolved packet data gateway, and a second tracing system connected to the second tracing gateway; the first evolution type packet data gateway is located in a first operator, and the second tracing gateway and the second tracing system are both located in a second operator;

7. The cross-operator tracing system of claim 6, wherein said broadband access message comprises an IP address and port number of said user terminal for a broadband access device;

8. The cross-operator tracing method according to claim 6, wherein the second tracing system is further configured to determine whether to sign up for VoWiFi service when receiving the location query instruction forwarded by the second tracing gateway: if the VoWiFi service is signed, feeding back the first query response information containing the sign of the signing information; if the VoWiFi service is not signed, feeding back the first query response information containing the sign of the non-signed information.

9. The cross-operator tracing system of claim 6, wherein said second tracing gateway is configured to determine whether said first query response information includes a subscription information identifier: if the subscription information identifier is contained, generating first response information responding to the subscription information identifier; otherwise, generating second response information responding to the sign of the non-subscription information;

10. The cross-operator tracing system of claim 6, wherein said first evolved packet data gateway and said second tracing gateway are communicatively connected by a simple workflow service interface; and