CN114845350A

CN114845350A - Routing method and device

Info

Publication number: CN114845350A
Application number: CN202210331513.5A
Authority: CN
Inventors: 曹孟; 彭艺
Original assignee: New H3C Technologies Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-08-02

Abstract

The embodiment of the application discloses a routing method and a routing device. After the terminal successfully registers to the local IMS system, the terminal in the application can obtain a first routing rule for indicating the terminal to access the local IMS system, after the terminal is successfully registered in the public network IMS system, the second routing rule for indicating the terminal to access the public network IMS system can be obtained, so that aiming at the call service to be executed in the terminal, if the destination number in the call service matches the first segment of number information in the first routing rule, the call service may be performed through the first PDU session as described above, if the target number is matched with the second type number field information in the second routing rule, the call service can be executed through a second PDU session associated with a public network IMS system, and the first PDU session based on the internal call service of the local data network is only passed through the local data network, so that the leakage of private data in the call service is avoided.

Description

Routing method and device

Technical Field

The present application relates to the field of communications, and in particular, to a routing method and apparatus.

Background

In a communication network system, a communication network may be divided into a public data network (referred to as a public network) and a local data network (also referred to as an enterprise data network) established by an enterprise, and when a user terminal (UE) belonging to the enterprise registers in the local data network in a current communication network system, the UE registers in a public network IMS (IP Multimedia Subsystem) system of the public network data network and a local IMS system of the local data network at the same time, so that the UE in the enterprise passes through the public network when performing an internal call service belonging to the local data network, which may cause leakage of data requiring privacy, such as enterprise data (e.g., call data of voice, video, and the like in the call service).

Disclosure of Invention

The application discloses a routing method, a device and equipment, which are used for avoiding leakage of privacy data in a local data network when UE executes a call service.

According to a first aspect of an embodiment of the present application, there is provided a routing method, which is applied to a terminal, and includes:

after the fact that the terminal is successfully registered to a local IP Multimedia Subsystem (IMS) system to which the terminal belongs is known, a first routing rule for indicating the terminal to access the local IMS system is obtained, wherein the first routing rule at least comprises a mapping relation between the local IMS system and first type number segment information, and the first type number segment information comprises number segments distributed by the local IMS system;

after the terminal is successfully registered in a public network IMS system, obtaining a second routing rule for indicating the terminal to access the public network IMS system, wherein the second routing rule at least comprises a mapping relation between the public network IMS system and second type number field information, and the second type number field information comprises number fields distributed by the public network IMS system;

for a call service to be executed, if a target number in the call service is matched with first type number segment information in the first routing rule, executing the call service through a first Protocol Data Unit (PDU) session which is established between the call service and 5G core network equipment and is related to the local IMS system; and if the target number in the call service is matched with the second type number field information in the second routing rule, executing the call service through a second PDU session which is established between the target number and 5G core network equipment and is related to the public network IMS system.

According to a second aspect of the embodiments of the present application, there is provided a routing method, which is applied to a 5G core network device, and includes:

after knowing that a terminal is successfully registered to a local IP Multimedia Subsystem (IMS) system to which the terminal belongs, issuing a first routing rule for indicating the terminal to access the local IMS system to the terminal, wherein the first routing rule at least comprises a mapping relation between the local IMS system and first type number segment information, and the first type number segment information comprises a number segment distributed by the local IMS system;

after the terminal is successfully registered to a public network IMS system, issuing a second routing rule for indicating the terminal to access the public network IMS system to the terminal, wherein the second routing rule at least comprises a mapping relation between the public network IMS system and second type number segment information, and the second type number segment information comprises number segments distributed by the public network IMS system;

the first routing rule is used for indicating the terminal to execute the call service through a first Protocol Data Unit (PDU) session which is established between the terminal and the 5G core network equipment and is related to the local IMS system when a target number in the call service executed by the terminal is matched with first type information in the first routing rule;

and the second routing rule is used for indicating the terminal to execute the call service through a second PDU session which is established between the terminal and 5G core network equipment and is related to the public network IMS system when a target number in the call service executed by the terminal is matched with the second type number segment information in the second routing rule.

According to a third aspect of the embodiments of the present application, there is provided a routing apparatus, which is applied to a terminal, and includes:

a first routing rule obtaining unit, configured to obtain, after it is known that the terminal is successfully registered in a local IP multimedia subsystem IMS system to which the terminal belongs, a first routing rule used for indicating that the terminal accesses the local IMS system, where the first routing rule at least includes a mapping relationship between the local IMS system and first type number segment information, and the first type number segment information includes a number segment allocated to the local IMS system;

a second routing rule obtaining unit, configured to obtain a second routing rule used for indicating the terminal to access the public network IMS system after knowing that the terminal is successfully registered in the public network IMS system, where the second routing rule at least includes a mapping relationship between the public network IMS system and second type number segment information, and the second type number segment information includes a number segment allocated to the public network IMS system;

a call service execution unit, configured to execute, for a call service to be executed, if a target number in the call service matches with first type number segment information in the first routing rule, the call service through a first protocol data unit PDU session associated with the local IMS system, which is established between 5G core network devices; and if the target number in the call service is matched with the second type number field information in the second routing rule, executing the call service through a second PDU session which is established between the target number and 5G core network equipment and is related to the public network IMS system.

According to a fourth aspect of the embodiments of the present application, there is provided a routing apparatus, which is applied to a 5G core network device, and includes:

a first routing rule issuing unit, configured to issue, to a terminal after learning that the terminal is successfully registered in a local IP multimedia subsystem IMS system to which the terminal belongs, a first routing rule for indicating that the terminal accesses the local IMS system, where the first routing rule at least includes a mapping relationship between the local IMS system and first type segment information, and the first type segment information includes a number segment allocated to the local IMS system;

a second routing rule issuing unit, configured to issue, to the terminal, a second routing rule for instructing the terminal to access the public network IMS system after it is known that the terminal is successfully registered in the public network IMS system, where the second routing rule at least includes a mapping relationship between the public network IMS system and second type number segment information, and the second type number segment information includes a number segment allocated to the public network IMS system;

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

it can be known from the above technical solutions that, after a terminal in the solution provided by the present application is successfully registered in a local IMS system, a first routing rule for instructing the terminal to access the local IMS system can be obtained, after the terminal is successfully registered in a public network IMS system, a second routing rule for instructing the terminal to access the public network IMS system can be obtained, and then, for a call service to be executed in the terminal, if a target number in the call service matches with first type number segment information in the first routing rule (that is, the call service is an internal call service of a local data network), the call service can be executed through a first PDU session associated with the local IMS system, if the target number matches with second type number segment information in the second routing rule, the call service can be executed through a second PDU session associated with the public network IMS system, the first PDU session based on the internal call service executing the local data network only passes through the local data network, and the leakage of privacy data in a local data network in the call service is avoided.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a scene diagram of a 5G communication system according to an embodiment of the present application;

fig. 2 is a flowchart of a method for routing according to an embodiment of the present application;

fig. 3 is a flowchart of another routing method provided in an embodiment of the present application;

fig. 4 is an interaction diagram for implementing a routing method according to an embodiment of the present application;

fig. 5 is a schematic diagram of a routing apparatus according to an embodiment of the present application;

fig. 6 is a schematic diagram of another routing apparatus according to an embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

In order to make those skilled in the art better understand the technical solutions provided in the embodiments of the present application and make the above objects, features and advantages of the embodiments of the present application more obvious and understandable, the following briefly describes the scenarios applied in the embodiments of the present application:

as an embodiment, an application of the embodiment of the present application may be a 5G communication network system shown in fig. 1, where the 5G communication network system includes a public data network (i.e., the public network in fig. 1) and at least one enterprise-built local data network (i.e., the enterprise network in fig. 1). The public Network at least includes a public Network IMS (IP Multimedia Subsystem) system and a public Network Data center (DN, Data Network of the public Network in fig. 1), and the enterprise Network at least includes a local IMS system and a local Data center.

The public network IMS system in the public network is used for realizing multimedia calls (such as voice calls, video calls and the like based on terminal numbers between terminals) among all terminals registered in the public network IMS system, and the public network data center is used for managing service data of services such as calling services and the like in the public network; a local IMS system in the enterprise network is used to implement multimedia sessions between terminals registered in the local IMS system, and a local data center in the enterprise network is used to manage service data of services such as call services in the enterprise network.

As an embodiment, the enterprise network is a local data network establishment application from an enterprise to an operator, after the operator establishes the application through the local data network of the enterprise, the operator establishes a new UPF (User Plane Function) network element allocated to the local data network of the enterprise based on hardware devices such as a base station and a cable used when establishing a public network, and then establishes the local data network of the enterprise based on the newly established UPF network element. Optionally, the local data network established by the enterprise may be a data network which is applied by a single enterprise to an operator and is used for processing the internal service of the enterprise, or a data network which is applied by a plurality of enterprises having a common service to the operator and is used for processing the common service.

Based on the above 5G communication network system, if a terminal of a user is an enterprise UE that is allocated by an enterprise and used for processing an internal service in a local data network, the enterprise UE needs to be registered in both a public network IMS system and a local IMS system, so that the enterprise UE can call other enterprise UEs registered in the local IMS system or other UEs registered in the public network IMS system when executing a call service. However, when the user uses the enterprise UE to call another enterprise UE registered in the local IMS system, since the enterprise UE of the user is also registered in the public network, the call may pass through the public network IMS system, and thus call data may be leaked during the call.

Therefore, in order to ensure that when a user uses the enterprise UE to register a call to another enterprise UE in the local IMS system, the user only passes through the local data network and does not pass through the public network, so as to avoid leakage of call data during the call process, the present embodiment provides a routing method, so that when the enterprise UE registers a call to another enterprise UE in the local IMS system, the user only passes through the local data network, and when the enterprise UE registers a call to another UE in the public network IMS system, the user only passes through the public network.

The routing method provided by the embodiment of the present application is further described in detail below with reference to the accompanying drawings. Referring to fig. 2, fig. 2 is a flowchart of a routing method according to an embodiment of the present application. As an embodiment, the flow shown in fig. 2 may be applied to a terminal such as a smart phone, a smart phone watch, and the like, which may perform a call service.

As shown in fig. 2, the process may include the following steps:

step 201, after learning that the terminal is successfully registered to the local IMS system to which the terminal belongs, obtaining a first routing rule for instructing the terminal to access the local IMS system.

The first routing rule in step 201 at least includes a mapping relationship between the local IMS system and first number segment information, where the first number segment information includes a number segment allocated to the local IMS system. As an embodiment, the number segment allocated to the local IMS system is a pre-assigned number segment of an enterprise network, where the number segment of the enterprise network may be pre-divided by an operator for a public network and an enterprise network, and the number segment allocated to the local IMS system in this embodiment may be an unused number segment that is found from the number segment of the enterprise network by the operator when the local IMS system is created.

Step 202, after learning that the terminal is successfully registered in the public network IMS system, obtaining a second routing rule for instructing the terminal to access the public network IMS system.

The second routing rule in step 202 at least includes a mapping relationship between the public network IMS system and second type number segment information, where the second type number segment information includes a number segment allocated to the public network IMS system. As an embodiment, the number segment allocated to the public network IMS system is a public network number segment that is assigned in advance, the public number segment may be a number segment that is divided by an operator in advance for a public network and an enterprise network, and the number segment allocated to the public network IMS system in this embodiment may be an unused number segment that is found from the public network number segment by the operator when the public network IMS system is created.

It should be noted that, in the above step 201 and step 202, it is required that the terminal successfully registers to the local IMS system and the public network IMS system, so as to ensure that the terminal can normally execute the local data network internal call service in the local data network and ensure that the terminal can normally execute the call service in the public network data network.

As an embodiment, the terminal may register in the local IMS system through the following steps: sending a Session Initiation Protocol (SIP) registration request through a first PDU Session between the 5G core network device, so that the 5G core network device forwards the SIP registration request to a local IMS system to which the terminal belongs, and the terminal is successfully registered to the local IMS system.

In this embodiment of the present application, the first PDU session used in the process of registering the terminal in the local IMS system is established by sending a first PDU session establishment request to the 5G core network device when the terminal detects a first PDU session establishment event. In this embodiment, the first PDU session establishment request is used to instruct the 5G core network device to establish a first PDU session associated with the local IMS system between the terminal and the 5G core network device, where the first PDU session is used to transfer communication between the terminal and the local IMS system.

Optionally, in order to establish a connection between the terminal and the local IMS system, a network flag of the local IMS system may be preconfigured in the terminal, so that the terminal automatically triggers a first PDU session establishment event based on the network identifier of the local IMS system after being powered on, and after detecting the first PDU session establishment event, the terminal may send a first PDU session establishment request carrying the network identifier of the local IMS system to the 5G core network device, so that the 5G core network device establishes a first PDU session associated with the local IMS system.

As an embodiment, the registration of the terminal in the public network IMS system may be performed through the following steps: and sending a Session Initiation Protocol (SIP) registration request through a second Protocol Data Unit (PDU) Session between the terminal and the 5G core network equipment, so that the 5G core network equipment forwards the SIP registration request to the public network IMS system, and the terminal is successfully registered to the public network IMS system.

In this embodiment of the present application, the second PDU session used in the registration process of the terminal in the public network IMS system is established by sending a second PDU session establishment request to the 5G core network device when the terminal detects a second PDU session establishment event. In this embodiment, the second PDU session establishment request is used to instruct the 5G core network device to establish a second PDU session used for being associated with the public network IMS system between the terminal and the 5G core network device, where the second PDU session is used to transfer communication between the terminal and the public network IMS system.

Optionally, in order to establish a connection between the terminal and the public network IMS system, a network flag of the public network IMS system may be configured in advance in the terminal, so that the terminal automatically triggers a second PDU session establishment event based on the network identifier of the public network IMS system after being powered on, and after detecting the second PDU session establishment event, the terminal may send a second PDU session establishment request carrying the network identifier of the public network IMS system to the 5G core network device, so that the 5G core network device establishes a second PDU session associated with the public network IMS system.

As an embodiment, based on the first PDU session and the second PDU session established with the 5G core network device in the foregoing embodiment, the first routing rule used for instructing the terminal to access the local IMS system is obtained in step 201, and the first routing rule issued by the 5G core network device may be received through the first PDU session; in step 202, the second routing rule used for instructing the terminal to access the public network IMS system is obtained, and the second routing rule issued by the 5G core network device may be received through the second PDU session. Optionally, in this embodiment, the obtaining of the first routing rule and the second routing rule may also be obtained by receiving a first routing rule and a second routing rule input from outside.

Optionally, the number segment information in the foregoing embodiments may be recorded by using a regular expression, for example, the number segment information is recorded as 1380000[0-9] {4,4}, which indicates a number segment with 1380000 bits in the first 7 bits and any one of 0-9 bits in the last 4 bits.

Step 203, aiming at the call service to be executed, when the target number in the call service is matched with the first number segment information in the first routing rule, executing the call service through a first PDU session which is established between the call service and 5G core network equipment and is related to a local IMS system; and when the target number in the call service is matched with the second type number field information in the second routing rule, executing the call service through a second PDU session which is established between the target number and the 5G core network equipment and is associated with the public network IMS system.

In specific application, when a terminal receives a calling instruction input from the outside to call a certain number, the existence of a calling service to be executed in the terminal is determined, and the certain number is a target number in the calling service to be executed.

As an embodiment, after determining that a call service to be executed exists in the terminal, the terminal may analyze the target number by using a newly compiled number segment analysis function, determine whether the target number matches with first type number segment information in the first routing rule or second type number segment information in the second routing rule, if the target number matches with the first type number segment information, determine that the target number is in a number segment allocated by the local IMS system, and need a first PDU session associated with the local IMS system to execute the call service, and if the target number matches with the second type number segment information, determine that the target number is in a segment allocated by the public network IMS system, and need a second PDU session associated with the public network IMS system to execute the call service.

Thus, the flow shown in fig. 2 is completed.

As can be seen from the flow shown in fig. 2, after the terminal in this embodiment successfully registers in the local IMS system, the first routing rule for instructing the terminal to access the local IMS system may be obtained, after the terminal successfully registers in the public network IMS system, the second routing rule for instructing the terminal to access the public network IMS system may be obtained, and further, for a call service to be executed in the terminal, if a target number in the call service matches with first type number segment information in the first routing rule (that is, the call service is an internal call service of the local data network), the call service may be executed through a first PDU session associated with the local IMS system, if the target number matches with second type number segment information in the second routing rule, the call service may be executed through a second PDU session associated with the public network IMS system, the first PDU session based on the internal call service that executes the local data network only passes through the local data network, and the leakage of privacy data in a local data network in the call service is avoided.

It should be noted that, in the embodiment of the present application, the execution sequence between the step 201 and the step 202 is not limited, and the execution sequence between the step 201 and the step 202 is related to the obtaining time of the first routing rule and the obtaining time of the second routing rule, if the first routing rule is obtained first, the step 201 is executed first, and if the second routing rule is obtained first, the step 202 is executed first.

Another embodiment of the routing method provided in the embodiments of the present application is briefly described below. Fig. 3 is a flow chart of another routing method, as shown in fig. 3. As an embodiment, the process shown in fig. 3 may be applied to a 5G core network device, where the 5G core network device at least includes a PCF (Policy Control Function) network element, an AMF (Access and Mobility Management Function) network element, an SMF (Session Management Function) network element, a UPF (User Plane Function) network element allocated to a local data network, and a UPF network element allocated to a public network in a 5G core network for Policy Control.

As shown in fig. 3, the process may include the following steps:

step 301, after learning that the terminal is successfully registered in the local IMS system to which the terminal belongs, issuing a first routing rule for instructing the terminal to access the local IMS system to the terminal.

Step 302, after knowing that the terminal is successfully registered in the public network IMS system, issuing a second routing rule for instructing the terminal to access the public network IMS system to the terminal.

The first routing rule issued to the terminal in step 301 is used to indicate the terminal to execute the call service through the first PDU session between the terminal and the 5G core network device and associated with the local IMS system when the target number in the call service executed by the terminal matches the first type of information in the first routing rule (i.e., the target number is in the number segment allocated by the local IMS system). The second routing rule issued to the terminal in step 302 is used to instruct the terminal to execute the call service through the second PDU session between the terminal and the 5G core network device and associated with the public network IMS system when the target number in the call service executed by the terminal matches the second type number segment information in the second routing rule (the target number is in the number segment allocated by the public network IMS system).

Optionally, the first routing rule in this embodiment is generated by the 5G core network device based on the number segment allocated to the local IMS system by the operator when the operator establishes the local data network and the network identifier of the local IMS system, and the second routing rule is generated by the 5G core network device based on the number segment allocated to the public network IMS system by the operator when the operator establishes the public network and the network identifier of the public network IMS system.

For example, when an operator in this embodiment establishes a local data network, a mapping relationship between a number segment allocated to a local IMS system and a network identifier of the local IMS system may be recorded in a PCF network element, a mapping relationship between a number segment allocated to a public network IMS system and a network identifier of the public network IMS system may be recorded in a PCF network element, and when the PCF network element learns that a terminal is successfully registered in the local IMS system and the public network IMS system, the PCF network element issues an extended URSP (UE Route Selection Policy) to the terminal, where an extended portion of the extended URSP includes a first Route rule or a second Route rule.

As an embodiment, the 5G core network device in this embodiment may learn that the terminal successfully registers to the local IMS system to which the terminal belongs by: when a notification message of successful SIP registration sent by a local IMS system is received through a first PDU session, the fact that the terminal is successfully registered to the local IMS system to which the terminal belongs is known. The 5G core network device in this embodiment learns that the terminal is successfully registered in the public network IMS system, and may perform the following steps: and when receiving a notification message of successful SIP registration sent by the public network IMS system through the second PDU session, acquiring that the terminal is successfully registered in the public network IMS system.

It should be noted that, in this embodiment, the first PDU session and the second PDU session are jointly constructed by different network elements belonging to a 5G core network device, so that in a specific implementation of the above embodiment, after a terminal sends an SIP registration request to a first PDU session passing through the 5G core network device, the 5G core network device passes through the SIP registration request to a local IMS system through a UPF network element bearing the first PDU session, and then the local IMS system registers the terminal to the local IMS system after receiving the SIP registration request and returns an SIP registration response to the terminal, and then sends a notification message that the SIP registration is successful to a PCF network element bearing the first PDU session in the 5G core network device. And after the terminal sends the SIP registration request to a second PDU session passing through the 5G core network equipment, the 5G core network equipment transparently transmits the SIP registration request to the public network IMS system through a UPF network element bearing the second PDU session, and then the public network IMS system registers the terminal to the public network IMS system after receiving the SIP registration request and returns the SIP registration response to the terminal, and then sends a notification message of the success of SIP registration to a PCF network element bearing the second PDU session in the 5G core network equipment.

As an embodiment, the first PDU session and the second PDU session are respectively established before the method flow shown in fig. 3 by the following steps:

receiving a first PDU session establishment request sent by a terminal, and then establishing a first PDU session used for being associated with a local IMS system between the terminal and 5G core network equipment based on the first PDU session establishment request; and receiving a second PDU session establishment request sent by the terminal, and then establishing a second PDU session for being associated with the public network IMS system between the terminal and the 5G core network equipment based on the second PDU session establishment request.

In a specific implementation, the first PDU session may be specifically established in the following manner: the 5G core network equipment receives a first PDU session establishment request through the AMF network element, then informs the SMF network element of the request, and then informs the PCF network element and the UPF network element allocated to the local data network of establishing the first PDU session through the SMF network element. The second PDU session may specifically be established in the following manner: the 5G core network equipment receives a second PDU session establishment request through the AMF network element, then informs the SMF network element of the request, and then informs the PCF network element and the UPF network element allocated to the public network of establishing a second PDU session through the SMF network element.

As an embodiment, after the 5G core network device successfully establishes the first PDU session and the second PDU session with the terminal, a first PDU session establishment response and a second PDU session establishment response are respectively returned to the terminal. The first PDU session establishment response may carry first PDU session information, such as a session identifier of the first PDU session, a network element identifier of each network element bearing the first PDU session, and a first media address allocated to the terminal in the local IMS system, and the second PDU session establishment response may carry second PDU session information, such as a session identifier of the second PDU session, a network element identifier of each network element bearing the second PDU session, and a second media address allocated to the terminal in the public network IMS system.

The first media address is allocated by a PCF network element in the 5G core network device carrying the first PDU session, and the second media address is allocated by a PCF network element in the 5G core network device carrying the second PDU session.

As an embodiment, the first media address is used for the terminal to register in the local IMS system, and the first media address identifies a PDU session in which the terminal is located when the terminal performs a call service belonging to the local IMS system. In the above embodiment, the SIP registration request sent by the terminal through the first PDU may carry a corresponding relationship between the first media address and the local number allocated to the terminal, so that when the local IMS system receives the call service executed by the terminal, it may determine to transmit service data in the call service using the first PDU session according to the corresponding relationship between the first media address and the local number allocated to the terminal.

In this embodiment, the second media address is used for the terminal to register in the public network IMS system, and the second media address identifies the PDU session in which the terminal is located when the terminal executes the call service belonging to the public network IMS system. In the above embodiment, the SIP registration request sent by the terminal through the second PDU may carry a corresponding relationship between the second media address and the public network number allocated to the terminal, so that when the public network IMS system receives the call service executed by the terminal, it may determine to transmit service data in the call service using the second PDU session according to the corresponding relationship between the second media address and the public network number allocated to the terminal.

The flow shown in fig. 3 is completed.

As can be seen from the flow shown in fig. 3, in this embodiment, after it is known that the terminal successfully registers in the local IMS system and the public network IMS system to which the terminal belongs through the 5G core network device, issuing, to the terminal, a first routing rule for instructing the terminal to access the local IMS system and a second routing rule for instructing the terminal to access the public network IMS system, so that the terminal can determine, based on the first routing rule and the second routing rule, when the target number in the call service to be executed in the terminal is matched with the first type number segment information in the first routing rule, executing the call service through the first PDU session associated with the local IMS system, when the destination number in the call traffic to be executed in the terminal matches the second type number segment information in the second routing rule, the call service is executed through the second PDU session associated with the public network IMS system, and the leakage of privacy data in a local data network in the call service is avoided.

It should be noted that, in the embodiment of the present application, the execution sequence between the step 301 and the step 302 is not limited, and the execution sequence between the step 301 and the step 302 is related to the time when the 5G core network device learns that the terminal is successfully registered in the local IMS system and learns that the terminal is successfully registered in the public network IMS system, if the terminal is successfully registered in the local IMS system, the step 301 is executed first, and if the terminal is successfully registered in the public network IMS system, the step 302 is executed first.

For ease of understanding, the routing method provided in the present application is described in detail below with reference to the specific embodiment shown in fig. 4:

as an embodiment, a scenario in which the routing method provided by the present application is applied includes at least a public network and a local data network. The public Network IMS system in the public Network Data Network and the local IMS system in the local Data Network are distinguished by a Network identifier (DNN, Data Network Name), which can uniquely identify the IMS system and the unique identification Data Network in the Data Network, for example, the Network identifier of the local IMS system can be set to imsLocal, and the Network identifier of the public Network IMS system is IMS.

In this embodiment, the network identifier may be allocated to the local IMS system and the public network IMS system by an operator when creating the public network and the local data network, the operator may also allocate number segments to the local IMS system and the public network IMS system when creating the public network and the local data network, respectively, record a mapping relationship between the number segment allocated to the local IMS system and the network identifier imsLocal of the local IMS system in a PCF network element in the 5G core network device, and record a mapping relationship between the number segment allocated to the public network IMS system and the network identifier IMS of the public network IMS system in a PCF network element in the 5G core network device.

As an embodiment, the number segments allocated by the operator to the local IMS system are divided based on pre-divided enterprise network number segments, for example, the enterprise network number segments at least include 1360000[0-9] {4,4}, 1370000[0-9] {4,4}, 1380000[0-9] {4,4} and 1390000[0-9] {4,4}, and 1360000[0-9] {4,4}, 1380000[0-9] {4,4} segments which are not allocated to other IMS systems can be allocated to the local IMS system.

After the local data network is built, based on the fact that a terminal needs to execute a service in the local data network, a network identifier imsLocal of the local IMS system and a network identifier IMS of the public network IMS system are configured in the terminal in advance, and then as shown in FIG. 4, when the terminal is started, the terminal automatically sends a first PDU session request carrying the network identifier imsLocal to 5G core network equipment and a second PDU session request carrying the network identifier IMS, so that the 5G core network equipment and the terminal establish a first PDU session associated with the local IMS system and a second PDU session associated with the public network IMS system. For the specific establishment procedure of the first PDU session and the second PDU session, reference may be made to the above description of the embodiment shown in fig. 3, which is not described herein again.

After the first PDU session and the second PDU session are established, the terminal obtains a first media address distributed by the 5G core network equipment for the terminal in the local IMS system through the obtained first PDU session information, and obtains a second media address distributed by the 5G core network equipment for the terminal in the public network IMS system through the obtained second PDU session information.

Then, the terminal can send the SIP registration request carrying the first media address and the local number pre-allocated to the terminal to the local IMS system through the first PDU session, and send the SIP registration request carrying the second media address and the public network number pre-allocated to the terminal to the public network IMS system through the second PDU session.

In this embodiment, after receiving the SIP registration request, the local IMS system records a mapping relationship between the first media address and a local number pre-allocated to the terminal, so that when the local IMS system learns that the terminal calls other terminals, call data transmitted by other terminals is transmitted to the terminal through the first PDU session indicated by the first media address, or when learning that other terminals request to call the terminal, finds the corresponding first media address according to the local number of the terminal, and then notifies the terminal through the first PDU session indicated by the first media address.

In this embodiment, the public network IMS system also records the mapping relationship between the second media address and the public network number pre-assigned to the terminal after receiving the SIP registration request, so that when the public network IMS system learns that the terminal calls another terminal, call data transmitted by another terminal is transmitted to the terminal through the second PDU session indicated by the second media address, or when learning that another terminal requests to call the terminal, the public network IMS system searches for the corresponding second media address according to the public network number of the terminal, and then notifies the terminal through the second PDU session indicated by the second media address.

Further, after the local IMS system receives the SIP registration request and records the mapping relationship between the first media address and the local number pre-assigned to the terminal, as shown in fig. 4, the local IMS system returns an SIP registration response to the terminal through the first PDU session to notify that the terminal is successfully registered in the local IMS system, and sends a notification message that the SIP registration is successful to the PCF network element in the 5G core network device, so that the 5G core network device learns that the terminal is successfully registered in the local IMS system.

Similarly, as shown in fig. 4, after the public network IMS system receives the SIP registration request and records the mapping relationship between the second media address and the public network number pre-allocated to the terminal, the public network IMS system returns an SIP registration response to the terminal through the second PDU session to notify that the terminal is successfully registered in the public network IMS system, and sends a notification message that the SIP registration is successful to the PCF network element in the 5G core network device, so that the 5G core network device learns that the terminal is successfully registered in the public network IMS system.

Further, as shown in fig. 4, after learning that the terminal is successfully registered in the local IMS system, the 5G core network device may trigger the PCF network element to send a first routing rule indicating that the terminal accesses the local IMS system to the terminal through the first PDU session, and after learning that the terminal is successfully registered in the public network IMS system, trigger the PCF network element to send a second routing rule indicating that the terminal accesses the public network IMS system to the terminal through the second PDU session.

Optionally, the terminal in this embodiment records the mapping relationship between the local IMS system and the first type number segment information in the first routing rule into a pre-created routing rule recording table after receiving the first routing rule through the first PDU session, and records the mapping relationship between the public network IMS system and the second type number segment information in the second routing rule into the same routing rule recording table after receiving the second routing rule through the second PDU session.

For example, the routing rule record table in the terminal may adopt a table record shown in the following table 1:

TABLE 1

The number segment information in table 1 is an example recorded by using a regular expression, for example, the number segment information 1380000[0-9] {4,4} indicates a number in which the first 7 bits of the number are 1380000 and each of the last 4 bits is any one of numbers from 0 to 9, the number segment information 1360000[0-9] {4,4} indicates a number in which the first 7 bits of the number are 1360000 and each of the last 4 bits is any one of numbers from 0 to 9, and the number segment information 135[0-9] {8,8} indicates a number in which the first 3 bits of the number are 135 and each of the last 8 bits is any one of numbers from 0 to 9.

As can also be seen from table 1, the local IMS system may be allocated one or more number segments, for example, the local IMS system whose DNN is imslcal in the table above is allocated two number segments: 1380000[0-9] {4,4} and 1360000[0-9] {4,4 }. Similarly, the public network IMS system may be assigned one or more numbers, and the public network with DNN of IMS in table 1 is assigned one number segment: 135[0-9]{8,8}. In this embodiment, how many number segments are allocated to the local IMS system depends on the business requirements of the enterprise applying for the enterprise network, and when a plurality of enterprises share one enterprise network, different number segments can be allocated to different enterprises according to the business requirements.

Based on the routing rule record table shown in fig. 1, when executing a call service, a terminal may first match a target number in the call service with each number segment information in the routing rule record table to determine a number segment where the target number is located, and then find a corresponding IMS DNN from the routing rule record table according to the number segment where the target number is located, thereby knowing which IMS system the PDU session that needs to be used to execute the call service is associated with. For example, when the destination number in the call service is 1380000XXXX (X indicates a specific number), it may be determined that the number segment information of the number segment in which the number is located is 1380000[0-9] {4,4}, and the network identifier of the IMS system corresponding to 1380000[0-9] {4,4} in the routing rule record table is imsilocal, and then the terminal may select the first PDU session associated with the local IMS system indicated by imsilocal to perform the call service.

So far, the description of the whole process of the routing when the terminal performs the call service in this embodiment is completed.

The above examples are merely for convenience of understanding, and the embodiments of the present application are not particularly limited.

The method provided by the embodiment of the application is described above. The following describes the apparatus provided in the embodiments of the present application:

referring to fig. 5, fig. 5 is a schematic diagram of a routing apparatus according to an embodiment of the present application, where the embodiment of the apparatus is applied to a terminal. The device includes:

a first routing rule obtaining unit 501, configured to obtain, after it is known that the terminal is successfully registered in a local IP multimedia subsystem IMS system to which the terminal belongs, a first routing rule used for indicating that the terminal accesses the local IMS system, where the first routing rule at least includes a mapping relationship between the local IMS system and first type number segment information, and the first type number segment information includes a number segment allocated to the local IMS system.

A second routing rule obtaining unit 502, configured to obtain, after learning that the terminal is successfully registered in the public network IMS system, a second routing rule used for instructing the terminal to access the public network IMS system, where the second routing rule at least includes a mapping relationship between the public network IMS system and second type number segment information, and the second type number segment information includes a number segment allocated to the public network IMS system.

A call service execution unit 503, configured to execute, for a call service to be executed, if a target number in the call service matches with first type number segment information in the first routing rule, the call service through a first protocol data unit PDU session associated with the local IMS system, which is established between 5G core network devices; and if the target number in the call service is matched with the second type number field information in the second routing rule, executing the call service through a second PDU session which is established between the target number and 5G core network equipment and is related to the public network IMS system.

Optionally, the apparatus further comprises:

a registering unit, configured to send a session initiation protocol SIP register request through a first PDU session with the 5G core network device, so that the 5G core network device forwards the SIP register request to a local IMS system to which a terminal belongs, and the terminal is enabled to register to the local IMS system successfully.

The obtaining unit 501 of the first routing rule obtains the first routing rule used for instructing the terminal to access the local IMS system, including:

and receiving the first routing rule issued by the 5G core network equipment through the first PDU session.

Optionally, the registering unit is further configured to send a session initiation protocol SIP registration request through a second PDU session between the 5G core network device, so that the 5G core network device forwards the SIP registration request to a public network IMS system, so that the terminal is successfully registered in the public network IMS system.

The obtaining, by the second routing rule obtaining unit 502, a second routing rule for instructing the terminal to access the public network IMS system includes:

and receiving the second routing rule issued by the 5G core network equipment through the second PDU session.

Optionally, the number segment allocated to the local IMS system is a pre-designated enterprise network number segment; and the number section allocated to the public network IMS system is a public network number section appointed in advance.

Optionally, the apparatus further comprises:

a first PDU session setup unit, configured to send a first PDU session setup request to the 5G core network device when a first PDU session setup event is detected; the first PDU session establishment request is used for instructing the 5G core network equipment to establish the first PDU session associated with the local IMS system between the terminal and the 5G core network equipment.

A second PDU session setup unit, configured to send a second PDU session setup request to the 5G core network device when a second PDU session setup event is detected; the second PDU session setup request is used to instruct the 5G core network device to setup the second PDU session for association with the public network IMS system between the terminal and the 5G core network device.

The above completes the description of the embodiment of the apparatus shown in fig. 5.

Referring to fig. 6, fig. 6 is a schematic diagram of a routing apparatus according to an embodiment of the present application, where the embodiment of the routing apparatus is applied to a 5G core network device. The device includes:

a first routing rule issuing unit 601, configured to issue, to a terminal after learning that the terminal is successfully registered in a local IP multimedia subsystem IMS system to which the terminal belongs, a first routing rule used for indicating that the terminal accesses the local IMS system, where the first routing rule at least includes a mapping relationship between the local IMS system and first type segment information, and the first type segment information includes a number segment allocated to the local IMS system.

A second routing rule issuing unit 602, configured to issue, to the terminal, a second routing rule for instructing the terminal to access the public network IMS system after it is known that the terminal is successfully registered in the public network IMS system, where the second routing rule at least includes a mapping relationship between the public network IMS system and second type number segment information, and the second type number segment information includes a number segment allocated to the public network IMS system.

Optionally, the step of the first routing rule issuing unit 601 knowing that the terminal successfully registers to the local IP multimedia subsystem IMS system to which the terminal belongs includes:

when a notification message of successful SIP registration sent by the local IMS system is received through the first PDU session, the terminal is informed of successful registration to the local IMS system to which the terminal belongs;

the second routing rule issuing unit 602 learns that the terminal is successfully registered in the public network IMS system, and includes:

and when receiving a notification message of successful SIP registration sent by the public network IMS system through the second PDU session, acquiring that a terminal is successfully registered in the public network IMS system.

Optionally, the apparatus further comprises:

a first PDU session establishing unit, configured to receive a first PDU session establishing request sent by the terminal; establishing the first PDU session between the terminal and the 5G core network device for association with the local IMS system based on the first PDU session establishment request.

A second PDU session establishing unit, configured to receive a second PDU session establishing request sent by the terminal; and establishing the second PDU session for associating with the public network IMS system between the terminal and the 5G core network equipment based on the second PDU session establishment request.

The above completes the description of the embodiment of the apparatus shown in fig. 6.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A routing method is applied to a terminal and comprises the following steps:

2. The method of claim 1, further comprising:

sending a Session Initiation Protocol (SIP) registration request through a first PDU session with the 5G core network equipment, so that the 5G core network equipment forwards the SIP registration request to a local IMS system to which a terminal belongs, and the terminal is successfully registered to the local IMS system;

the obtaining a first routing rule for indicating the terminal to access the local IMS system includes:

3. The method of claim 1, further comprising:

sending a Session Initiation Protocol (SIP) registration request through a second PDU session with the 5G core network equipment, so that the 5G core network equipment forwards the SIP registration request to a public network IMS system, and the terminal is successfully registered to the public network IMS system;

the obtaining of the second routing rule for indicating the terminal to access the public network IMS system includes:

4. A method according to any of claims 1 to 3, wherein the number segment to which the local IMS system is allocated is a pre-assigned enterprise number segment; and the number section allocated to the public network IMS system is a public network number section appointed in advance.

5. A method according to any one of claims 1 to 3, characterized in that the method is preceded by:

when a first PDU session establishment event is detected, sending a first PDU session establishment request to the 5G core network equipment; the first PDU session establishment request is used for instructing the 5G core network equipment to establish the first PDU session associated with the local IMS system between the terminal and the 5G core network equipment;

when a second PDU session establishment event is detected, sending a second PDU session establishment request to the 5G core network equipment; the second PDU session setup request is used to instruct the 5G core network device to setup the second PDU session for association with the public network IMS system between the terminal and the 5G core network device.

6. A routing method is applied to 5G core network equipment and is characterized by comprising the following steps:

7. The method of claim 6, wherein the learning that the terminal successfully registers with the local IP multimedia subsystem IMS system to which the terminal belongs comprises:

the acquiring that the terminal is successfully registered to the public network IMS system comprises the following steps:

8. The method of claim 6 or 7, further comprising:

receiving a first PDU session establishment request sent by the terminal; establishing the first PDU session for association with the local IMS system between the terminal and the 5G core network device based on the first PDU session establishment request;

receiving a second PDU session establishment request sent by the terminal; and establishing the second PDU session for associating with the public network IMS system between the terminal and the 5G core network equipment based on the second PDU session establishment request.

9. A routing apparatus, applied to a terminal, comprising:

a call service execution unit, configured to execute, for a call service to be executed, if a target number in the call service matches with first type number segment information in the first routing rule, the call service through a first protocol data unit PDU session associated with the local IMS system, which is established between 5G core network devices; and if the target number in the call service is matched with the second type number segment information in the second routing rule, executing the call service through a second PDU session which is established between the call service and the 5G core network equipment and is related to the public network IMS system.

10. A routing device is applied to a 5G core network device, and comprises: