CN112399523B - URSP checking method and device - Google Patents

Abstract

The embodiment of the application provides a URSP checking method and device, relates to the technical field of communication, and solves the technical problem that whether a monitoring terminal correctly executes a URSP issued by core network equipment or not in the prior art. The URSP checking method comprises the following steps: PCF equipment receives URSP checking request from original SMF equipment; since the URSP check request includes: the terminal sends the original URSP and PSI of the original URSP carried when the PDU session establishment request is sent to the original SMF equipment, therefore, the PCF equipment determines the target URSP corresponding to the PSI and checks the original URSP according to the target URSP.

Description

A URSP verification method and device

technical field

The invention relates to the field of communication technology, in particular to a URSP checking method and device.

Background technique

In the 3rd generation partnership project (3GPP) R15 stage, the 5th generation (5G) core network already has policy configuration solutions for some terminals and services, and defines terminal routing selection strategies (user equipment routing selection policy, URSP). Core network equipment further refines the control of terminal service sessions through URSP policies.

However, since there are many types of terminals, the capabilities of different terminals may vary greatly, and some terminals may not be able to correctly execute the URSP issued by the network. In this case, how to monitor whether the terminal correctly executes the URSP issued by the core network device is a technical problem that needs to be solved urgently.

Contents of the invention

The present application provides a URSP verification method and device, which solves the technical problem in the prior art that it is impossible to monitor whether a terminal is correctly executing the URSP issued by the core network equipment.

In order to achieve the above object, the application adopts the following technical solutions:

In the first aspect, a URSP verification method is provided, which is applied to a PCF device, including: the PCF device receives the URSP verification request from the SMF device; since the URSP verification request includes: the original PDU session establishment request carried by the terminal to the original SMF device The URSP and the PSI of the original URSP, therefore, the PCF device determines the target URSP corresponding to the PSI, and checks the original URSP according to the target URSP.

It can be seen that the PDU session establishment request sent by the terminal to the original SMF device carries the original URSP and the PSI of the original URSP, and the original SMF device sends a URSP verification request to the PCF device before establishing a PDU session with the terminal. Since the URSP verification request includes: the original URSP and the PSI of the original URSP carried when the terminal sends the PDU session establishment request to the original SMF device, the PCF device determines the target URSP corresponding to the PSI, and checks the original URSP according to the target URSP to solve the problem. It solves the technical problem that the existing technology cannot monitor whether the terminal correctly executes the URSP issued by the core network equipment, and ensures the reliability and controllability of the terminal service.

In a second aspect, a URSP checking device is provided, which is applied to PCF equipment, and includes: a receiving unit, a determining unit, and a checking unit. The receiving unit is configured to receive the terminal routing selection policy URSP verification request from the original session management function SMF device. The URSP verification request includes: the original URSP carried when the terminal sends the protocol data unit PDU session establishment request to the original SMF device and the policy partition identifier PSI of the original URSP. A determining unit, configured to determine a target URSP corresponding to the PSI received by the receiving unit. The processing unit is configured to check the original URSP according to the target URSP determined by the determining unit.

In a third aspect, a URSP verification device is provided, including a memory and a processor. The memory is used to store instructions executed by the computer, and the processor and the memory are connected through a bus. When the URSP verification device is running, the processor executes the computer-executable instructions stored in the memory, so that the URSP verification device executes the URSP verification method described in the first aspect.

The URSP verification device may be a network device, or a part of the network device, such as a chip system in the network device. The chip system is used to support the network device to implement the functions involved in the first aspect and any possible implementation thereof, for example, receiving, determining, and distributing the data and/or information involved in the above-mentioned URSP verification method. The chip system includes a chip, and may also include other discrete devices or circuit structures.

In a fourth aspect, a computer-readable storage medium is provided, the computer-readable storage medium includes computer-executable instructions, and when the computer-executable instructions are run on a computer, the computer is made to execute the URSP verification method described in the first aspect.

In the fifth aspect, a computer program product is provided, the computer program product includes computer instructions, and when the computer instructions are run on the computer, the computer is made to execute the URSP verification method as described in the above first aspect and its various possible implementations .

It should be noted that all or part of the above computer instructions may be stored on the first computer-readable storage medium. Wherein, the first computer-readable storage medium may be packaged together with the processor of the URSP verification device, or may be separately packaged with the processor of the URSP verification device, which is not limited in this application.

For the description of the second aspect, the third aspect, the fourth aspect and the fifth aspect of the present invention, you can refer to the detailed description of the first aspect; and, the description of the second aspect, the third aspect, the fourth aspect and the fifth aspect For the beneficial effect, reference may be made to the analysis of the beneficial effect in the first aspect, which will not be repeated here.

In this application, the names of the above-mentioned URSP verification devices do not limit the equipment or functional modules themselves. In actual implementation, these equipment or functional modules may appear with other names. As long as the functions of each device or functional module are similar to those of the present invention, they fall within the scope of the claims of the present invention and their equivalent technologies.

These and other aspects of the invention will be more clearly understood in the following description.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system provided by an embodiment of the present application;

Fig. 2 is a schematic diagram of the hardware structure of a URSP verification device provided by the embodiment of the present application;

Fig. 3 is a schematic diagram of the hardware structure of another URSP verification device provided by the embodiment of the present application;

Fig. 4 is a schematic flow chart of a URSP checking method provided by the embodiment of the present application;

Fig. 5 is a schematic structural diagram of a URSP verification device provided by an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same or similar items with basically the same functions and functions. Personnel can understand that words such as "first" and "second" are not limiting the quantity and execution order.

In order to facilitate understanding of the present application, related concepts involved in the embodiments of the present application are now described.

Access and mobility management function (AMF) equipment

The AMF device is a device in the core network of the fifth generation mobile networks (5G), and is mainly used to implement registration management, connection management, mobility management, user accessibility management, participation in authentication and authorization. Management functions of the control plane such as management.

In this embodiment of the present application, the first core network device may be a first AMF device in the first core network, and the second core network device may be a second AMF device in the second core network.

For ease of description, the embodiment of the present application takes the first core network device as the first AMF device and the second core network device as the second AMF device as an example for description.

Session management function (SMF) device

The SMF device is a device in the 5G core network. It is mainly responsible for session management related work, including establishment, modification, release, etc. The specific functions include Internet Protocol (IP) address allocation, selection and control of users during session establishment. face, configure service routing and uplink traffic guidance, determine session and service continuity modes, configure user port function equipment quality of service (quality of service, QOS) policies, etc.

Policy control function (PCF) device

The PCF device is a device in the 5G core network. It is mainly used to obtain the policy information signed by the user terminal and deliver the policy information to the AMF device and the SMF device.

Terminal routing selection policy (user equipment routing selection policy, URSP)

3GPP defines the URSP mechanism within the framework of the 5G core network. Through URSP, core network devices can further refine the control of terminal service sessions. A standard URSP marks a specific service type through a traffic descriptor (Traffic Descriptor), and the corresponding policy rules are defined as shown in Table 1.

Table 1

The content definition of the routing descriptor list in URSP is shown in Table 2.

Table 2

In practical applications, the PCF device signs the URSP at the granularity of each terminal, and sends the URSP corresponding to the terminal to the terminal through the UE policy control process when the terminal is registered to the 5G network. After receiving the corresponding URSP, the terminal stores and activates the URSP at the operating system level. When the terminal uses the service that matches the corresponding traffic descriptor in the URSP, the terminal will adapt the corresponding URSP and request for subsequent service session establishment. Carry the corresponding identifier related to session control.

Exemplarily, the PCF device signs a URSP for the first service of the terminal, and the standard for matching the flow descriptor is an IP address. It is assumed that the IP address of the server corresponding to the first service is 1.1.1.1. When the terminal initiates the first service to access the destination address 1.1.1.1, the terminal judges that it needs to match and execute the IP descriptor to configure the URSP whose destination address is 1.1.1.1, then the terminal carries the route corresponding to the route configured in the URSP in the subsequent service session establishment request Select the parameter value specified in the descriptor list (such as S-NSSAI=00000001, DNN=5gnet, etc.).

As described in the background, since there are many types of terminals, the capabilities of different terminals may vary greatly, and some terminals may not be able to correctly execute the URSP issued by the network. In this case, how to monitor whether the terminal correctly executes the URSP issued by the core network device is a technical problem that needs to be solved urgently.

When how to monitor whether the terminal correctly executes the URSP delivered by the core network equipment, it is first determined that the process of delivering the URSP to the terminal by the standard PCF equipment defined by 3GPP includes S1-S4.

S1. The terminal sends a registration request to the AMF device.

S2. The AMF device requests the URSP from the PCF device.

S3. The PCF device delivers the URSP corresponding to the terminal to the AMF device.

S4. The AMF device forwards the URSP issued by the PCF device to the terminal.

After the URSP sending process ends, the process of establishing a PDI session between the terminal and the AMF device includes S5-S7.

S5. The terminal sends a PDU session establishment request to the AMF device. The request includes the DNN and S-NSSAI specified in the routing descriptor list in the URSP, and N1 SM information (related to session management transmitted through the N1 interface), which includes the PDU session Establishment request, the PDU session establishment request includes all parameter values (DNN/S-NSSAI/SSC Mode/etc) specified by the routing descriptor in URSP.

S6. The AMF device transparently transmits (that is, only forwards but does not parse) the N1 SM information to the SMF device, and at the same time forwards the DNN and S-NSSAI carried in the registration request of the terminal to the SMF device.

S7. The SMF device completes the establishment of subsequent PDU sessions according to the session control parameter (PDU session type/SSC Mode) carried in the PDU session establishment request in the N1 SM information and the DNN/S-NSSAI carried in the terminal registration request forwarded by the AMF device, This includes requesting policy information related to session management from the PCF device. It should be noted that the session management policy and the terminal routing selection policy belong to different policy types, and the functions implemented and included contents are different from each other.

It can be seen from the above that the nodes involved in URSP delivery mainly include terminals, AMF devices, and PCF devices, and the subsequent PDU session establishment process mainly involves nodes including terminals, AMF devices, SMF devices, and PCF devices. Therefore, when monitoring whether the terminal correctly executes the URSP delivered by the core network device, there are several potential execution points for the ability to check the URSP execution status, namely: AMF device, SMF device, or PCF device.

For the AMF device, because the AMF device will not parse the content of the N1 SM information during the establishment of the PDU session, the AMF device cannot obtain the complete URSP parameter content, and the AMF device cannot be used as the execution point for verification.

For SMF devices, since the URSP delivery process does not go through SMF, and multiple PDU sessions established by a single terminal may be established through different SMF devices, it is impossible to know in advance which SMF device should store the URSP (for subsequent comparison verification), so the SMF device cannot be used as the execution point of the verification.

For the PCF device, the PCF itself stores the full amount of URSP rule information of the terminal. The standard mechanism defined by the existing 3GPP can ensure that the AMF device and the SMF device select the same PCF device during the registration process and the PDU session establishment process of the terminal. At the same time, when there is a PCF device, the SMF device must interact with the PCF device to obtain session management related policies during the PDU session establishment process, and the existing process can be reused to report the parameters requested by the terminal to the PCF device.

Therefore, in response to the above problems, the embodiment of the present application provides a URSP verification method, including: the terminal sends a PDU session establishment request to the original SMF device to carry the original URSP and the PSI of the original URSP, and the original SMF device establishes a PDU session with the terminal before , first send a URSP verification request to the PCF device. Since the URSP verification request includes: the original URSP and the PSI of the original URSP carried when the terminal sends the PDU session establishment request to the original SMF device, the PCF device determines the target URSP corresponding to the PSI, and checks the original URSP according to the target URSP to solve the problem. It solves the technical problem that the existing technology cannot monitor whether the terminal correctly executes the URSP issued by the core network equipment, and ensures the reliability and controllability of the terminal service.

The URSP verification method provided in the embodiment of the present application is applicable to the communication system 10 . FIG. 1 shows a structure of the communication system 10 . As shown in FIG. 1 , the communication system 10 includes: a terminal 11 , an AMF device 12 , an SMF device 13 and a PCF device 14 .

Wherein, terminal 11 is connected with AMF device 12 through N1 interface; AMF device 12 is connected with SMF device 13 through N11 interface; SMF device 13 is connected with PCF device 14 through N7 interface; AMF device 12 is connected with PCF device 14 through N15 interface.

The above N1 interface, N11 interface, N7 interface and N15 interface are all standard interfaces defined by 3GPP.

The terminal 11 in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem. The wireless terminal can communicate with one or more core networks via a radio access network (Radio Access Network, RAN). Wireless terminals can be mobile terminals, such as mobile phones (or "cellular" phones) and computers with mobile terminals, and can also be portable, pocket, hand-held, computer built-in or vehicle-mounted mobile devices, which are connected to wireless terminals. Access to a network to exchange language and/or data, for example, mobile phones, tablet computers, notebook computers, netbooks, personal digital assistants (Personal Digital Assistant, PDA).

It should be noted that the embodiments of the present application may also be applied to communication systems of other mobile communication technologies, for example, fourth generation mobile networks (4th generation mobile networks, 4G). When the embodiment of the present application is applied to communication systems of other mobile communication technologies, the above-mentioned 5G core network equipment may be core network equipment with the same function in communication systems of other mobile communication technologies. For example, the function of the PCF device is the same as that of the policy and charging rules function (PCRF) device in the 4G core network. Therefore, when the embodiment of the present application is applied to a 4G communication system, the PCF device in the embodiment of the present application can be replaced with a PCRF device.

The basic hardware structures of the terminal 11, AMF device 12, SMF device 13 and PCF device 14 in FIG. 1 are similar, and all include the elements included in the URSP verification device shown in FIG. 2 . Taking the URSP verification device shown in FIG. 2 as an example, the hardware structures of terminal 11, AMF device 12, SMF device 13 and PCF device 14 in FIG. 1 are introduced below.

FIG. 2 shows a schematic diagram of a hardware structure of the URSP verification device provided by the embodiment of the present application. As shown in FIG. 2 , the URSP verification device includes a processor 21 , a memory 22 , a communication interface 23 and a bus 24 . The processor 21 , the memory 22 and the communication interface 23 may be connected through a bus 24 .

The processor 21 is the control center of the URSP verification device, and may be one processor, or a general term for multiple processing elements. For example, the processor 21 may be a general-purpose central processing unit (central processing unit, CPU), or other general-purpose processors. Wherein, the general-purpose processor may be a microprocessor or any conventional processor.

As an embodiment, the processor 21 may include one or more CPUs, such as CPU 0 and CPU 1 shown in FIG. 2 .

Memory 22 may be read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM) or other types that can store information and instructions The dynamic storage device can also be an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a magnetic disk storage medium or other magnetic storage devices, or can be used to carry or store instructions or data structures desired program code and any other medium that can be accessed by a computer, but not limited thereto.

In a possible implementation manner, the memory 22 may exist independently of the processor 21, and the memory 22 may be connected to the processor 21 through the bus 24 for storing instructions or program codes. When the processor 21 invokes and executes the instructions or program codes stored in the memory 22, it can realize the URSP verification method provided by the embodiment of the present invention.

In another possible implementation manner, the memory 22 may also be integrated with the processor 21 .

The communication interface 23 is used for connecting with other devices through a communication network. The communication network may be an Ethernet, a wireless access network, a wireless local area network (wireless local area networks, WLAN) and the like. The communication interface 23 may include a receiving unit for receiving data, and a sending unit for sending data.

The bus 24 may be an Industry Standard Architecture (Industry Standard Architecture, ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, EISA) bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 2 , but it does not mean that there is only one bus or one type of bus.

It should be pointed out that the structure shown in FIG. 2 does not constitute a limitation to the URSP verification device. In addition to the components shown in Figure 2, the URSP verification device may include more or fewer components than shown, or combine certain components, or have a different arrangement of components.

Fig. 3 shows another hardware structure of the URSP verification device in the embodiment of the present application. As shown in FIG. 3 , the URSP verification device may include a processor 31 and a communication interface 32 . Processor 31 is coupled with communication interface 32 .

For functions of the processor 31, reference may be made to the description of the processor 21 above. In addition, the processor 31 also has a storage function, and reference may be made to the function of the above-mentioned memory 22 .

The communication interface 32 is used to provide data to the processor 31 . The communication interface 32 may be an internal interface of the URSP checking device, or an external interface of the URSP checking device (equivalent to the communication interface 23).

It should be pointed out that the structure shown in Figure 2 (or Figure 3) does not constitute a limitation to the URSP verification device, except for the components shown in Figure 2 (or Figure 3), the URSP verification device may include More or fewer components, or combinations of certain components, or different arrangements of components.

The URSP verification method provided by the embodiment of the present application will be described in detail below in conjunction with the communication system shown in FIG. 1 and the URSP verification device shown in FIG. 2 (or FIG. 3 ).

Fig. 4 is a schematic flowchart of a URSP verification method provided by the embodiment of the present application. As shown in Figure 4, the URSP verification method includes the following S401-S413.

S401. The terminal sends a PDU session establishment request to the original SMF device.

It should be understood that during the process of terminal registration to the 5G network, that is, before the terminal sends a PDU session establishment request to the original SMF device, the PCF device has issued the URSP signed by the terminal to the terminal. For specific steps, reference may be made to the procedures S1-S4 in which the standard PCF device delivers the URSP to the terminal as defined by the above-mentioned 3GPP.

After the PCF device delivers the URSP to the terminal, the terminal sends a PDU session establishment request to the AMF device. The PDU session establishment request carries the original URSP and N1 SM information (possibly including PDU session type and SSC Mode). In addition, the terminal additionally includes a policy section ID (PSI) corresponding to the executed URSP in the N1 SM information, which is used for the subsequent PCF device to search for the URSP corresponding to the PSI from multiple stored URSPs. The AMF device transparently transmits the N1 SM information to the original SMF device, and simultaneously forwards the DNN/S-NSSAI requested by the terminal to the original SMF device.

S402. The PCF device receives the URSP verification request from the original SMF device.

Wherein, the URSP verification request includes: the original URSP and the PSI of the original URSP carried when the terminal sends the PDU session establishment request to the original SMF device.

Specifically, after receiving the PDU session establishment request sent by the terminal, the original SMF device sends a URSP verification request to the PCF device, and the request message carries the URSP-related session control parameter values (PDU session type) carried in the N1 SM information. /SSC Mode), and the original URSP and PSI of the original URSP carried when the terminal sends a PDU session establishment request to the original SMF device. Wherein, the original URSP includes the DNN/S-NSSAI carried in the terminal registration request forwarded by the AMF device.

S403. The PCF device determines a target URSP corresponding to the PSI.

After receiving the URSP verification request from the original SMF device, since the URSP verification request includes: the original URSP and the PSI of the original URSP carried when the terminal sends a PDU session establishment request to the original SMF device, the PCF device checks the original URSP from the stored multiple URSP Find the URSP corresponding to the PSI.

S404. The PCF device checks the original URSP according to the target URSP.

After determining the target URSP corresponding to the PSI, the PCF device checks the original URSP according to the target URSP.

Specifically, when the PCF device checks the original URSP according to the target URSP, if the parameters in the target URSP correspond to the parameters in the original URSP, S405-S406 will be executed; if the data network name DNN in the target URSP is the same as that in the original URSP The DNN of the target URSP is consistent, the network slice selection auxiliary information S-NSSAI in the target URSP is consistent with the S-NSSAI in the original URSP, and other parameters in the target URSP are inconsistent with other parameters in the original URSP, then execute S406-S407; if the target If the DNN in the URSP is inconsistent with the DNN in the original URSP, or the S-NSSAI in the target URSP is inconsistent with the S-NSSAI in the original URSP, execute S408-S412.

S405. The PCF device sends a first response message to the original SMF device.

Specifically, if the parameters in the target URSP correspond one-to-one with the parameters in the original URSP, it means that the original URSP is consistent with the target URSP, that is, the terminal correctly executes the URSP issued by the PCF device. In this case, the PCF device sends a first response message to the original SMF device. Wherein, the first response message is used to instruct the original SMF device to establish a PDU session with the terminal according to the original URSP.

S406. The original SMF device establishes a PDU session with the terminal according to the original URSP.

Optionally, the PDU session may be a session such as user plane function UPF device selection, user plane tunnel establishment, and the like.

S407. The PCF device sends a second response message to the original SMF device.

Specifically, if the data network name DNN in the target URSP is consistent with the DNN in the original URSP, the network slice selection auxiliary information S-NSSAI in the target URSP is consistent with the S-NSSAI in the original URSP, and other parameters in the target URSP are the same as Other parameters in the original URSP are inconsistent, indicating that the DNN and S-NSSAI in the original URSP match, but other parameters do not match. In this case, the AMF device does not need to reselect the SMF device, but only needs to modify the parameters in the original URSP that do not match the target URSP, and send the second response message to the original SMF device. Wherein, the second response message is used to instruct the original SMF device to establish a PDU session with the terminal according to the target URSP.

S408. The original SMF device establishes a PDU session with the terminal according to the target URSP.

S409. The PCF device sends a third response message to the original SMF device.

Specifically, if the DNN in the target URSP is inconsistent with the DNN in the original URSP, or the S-NSSAI in the target URSP is inconsistent with the S-NSSAI in the original URSP, it means that the original SMF device selected by the AMF device may not meet the requirements of the target URSP. Achieved business guarantee effect. In this case, the PCF device sends a third response message to the original SMF device. Wherein, the third response message is used to instruct the original SMF device to send reselection information to the AMF device according to the target URSP; the reselection information is used to instruct the AMF device to select a target SMF device satisfying the target URSP according to the target URSP.

S410. The original SMF device sends reselection information to the AMF device according to the target URSP.

Specifically, after the PCF device sends the third response message to the original SMF device, the original SMF device sends an SMF device reselection message to the AMF device, and the message carries the correct DNN and S-NSSAI of the PDU session requested by the terminal to be established, namely If the DNN and S-NSSAI in the target URSP sent by the PCF device need to modify other parameters in the original URSP at the same time, the original SMF device should send the corrected parameters (ie, the target URSP) to the AMF device.

S411. The AMF device selects a target SMF device satisfying the target URSP according to the target URSP.

Specifically, after receiving the reselection information sent by the original SMF device according to the target URSP, the AMF reports the SMF device reselection based on the DNN and S-NSSAI in the target URSP received from the original SMF device, and selects the target that satisfies the target URSP. SMF devices.

S412. The AMF device forwards the PDU session establishment request sent by the terminal to the target SMF device.

After determining the target SMF device, the AMF device sends a PDU session establishment request to the target SMF device, and carries the session control parameters (DNN, S-NSSAI, PDU session type, SSC Mode, etc.).

S413. The target SMF device establishes a PDU session with the terminal according to the target URSP.

After receiving the PDU session establishment request sent by the terminal forwarded by the AMF device, the target SMF device completes the establishment of subsequent PDU session user plane resources, acquisition and execution of session management policies, and returns a PDU session establishment response to the terminal through the AMF device , to complete the establishment of the PDU session.

The embodiment of the present application provides a URSP verification method, including: PCF device receives URSP verification request from SMF device; since URSP verification request includes: original URSP and original URSP information carried when terminal sends PDU session establishment request to original SMF device PSI, therefore, the PCF device determines the target URSP corresponding to the PSI, and checks the original URSP according to the target URSP.

It can be seen that the PDU session establishment request sent by the terminal to the original SMF device carries the original URSP and the PSI of the original URSP, and the original SMF device sends a URSP verification request to the PCF device before establishing a PDU session with the terminal. Since the URSP verification request includes: the original URSP and the PSI of the original URSP carried when the terminal sends the PDU session establishment request to the original SMF device, the PCF device determines the target URSP corresponding to the PSI, and checks the original URSP according to the target URSP to solve the problem. It solves the technical problem that the existing technology cannot monitor whether the terminal correctly executes the URSP issued by the core network equipment, and ensures the reliability and controllability of the terminal service.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of methods. In order to realize the above functions, it includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software in combination with the example units and algorithm steps described in the embodiments disclosed herein. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention.

In the embodiment of the present application, the functional modules of the URSP verification device can be divided according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. Optionally, the division of modules in this embodiment of the present application is schematic, and is only a logical function division, and there may be another division manner in actual implementation.

As shown in FIG. 5 , it is a schematic structural diagram of a URSP verification device 50 provided in the embodiment of the present application. The URSP verification device 50 is used to solve the technical problem that the existing technology cannot monitor whether the terminal correctly executes the URSP issued by the core network equipment, for example, it is used to execute the URSP verification method shown in FIG. 4 . The URSP checking apparatus 50 is applied to PCF equipment, and includes: a receiving unit 501 , a determining unit 502 and a checking unit 503 .

The receiving unit 501 is configured to receive a URSP verification request from the SMF device; the URSP verification request includes: the original URSP carried when the terminal sends a PDU session establishment request to the original SMF device and the PSI of the original URSP. For example, referring to FIG. 4 , the receiving unit 501 is configured to execute S402.

The determining unit 502 is configured to determine a target URSP corresponding to the PSI received by the receiving unit 501 . For example, referring to FIG. 4 , the determining unit 502 is configured to execute S403.

A processing unit, configured to check the original URSP according to the target URSP determined by the determining unit 502 . For example, referring to FIG. 4, the processing unit is configured to execute S404.

Optionally, the URSP verification apparatus further includes: a sending unit 504 .

The sending unit 504 is configured to send a first response message to the original SMF device if the parameters in the target URSP checked by the checking unit 503 correspond one-to-one with the parameters in the original URSP. The first response message is used to instruct the original SMF device to establish a PDU session with the terminal according to the original URSP. For example, referring to FIG. 4 , the sending unit 504 is configured to execute S405.

Optionally, the sending unit 504 is also configured to: if the data network name DNN in the target URSP checked by the checking unit 503 is consistent with the DNN in the original URSP, and the network slice selection auxiliary information S-NSSAI in the target URSP is the same as that in the original URSP If the S-NSSAI is consistent and other parameters in the target URSP are inconsistent with other parameters in the original URSP, a second response message is sent to the original SMF device. The second response message is used to instruct the original SMF device to establish a PDU session with the terminal according to the target URSP. For example, referring to FIG. 4 , the sending unit 504 is configured to execute S407.

Optionally, the sending unit 504 is further configured to: if the DNN in the target URSP checked by the checking unit 503 is inconsistent with the DNN in the original URSP, or the S-NSSAI in the target URSP is inconsistent with the S-NSSAI in the original URSP, send The original SMF device sends a third response message. The third response message is used to instruct the original SMF device to send reselection information to the access and mobility management function AMF device according to the target URSP. The reselection information is used to instruct the AMF device to select a target SMF device satisfying the target URSP according to the target URSP. For example, referring to FIG. 4 , the sending unit 504 is configured to execute S409.

An embodiment of the present application also provides a computer-readable storage medium, where the computer-readable storage medium includes computer-executable instructions. When the computer executes the instructions and runs on the computer, the computer is made to execute the various steps performed by the URSP verification device in the URSP verification method provided in the above embodiments.

The embodiment of the present application also provides a computer program product, which can be directly loaded into the memory and contains software codes. After the computer program product is loaded and executed by a computer, it can implement the URSP verification method provided by the above embodiment. , the various steps performed by the URSP verification device.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using a software program, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When computer-executed instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. A computer can be a general purpose computer, special purpose computer, computer network, or other programmable device. Computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, e.g. Coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) transmission to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or may contain one or more data storage devices such as servers and data centers that can be integrated with the medium. Available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media (eg, solid state disk (solid state disk, SSD)) and the like.

Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above-mentioned functional modules is used as an example for illustration. In practical applications, the above-mentioned functions can be allocated according to needs It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division, and there may be other division methods in actual implementation. For example a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. A unit described as a separate component may or may not be physically separated, and a component shown as a unit may be one physical unit or multiple physical units, which may be located in one place or distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units. If an integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. A URSP checking method is applied to a Policy Control Function (PCF) device and comprises the following steps:

receiving a terminal routing strategy URSP checking request from an original session management function SMF device; the URSP check request includes: the terminal sends a Protocol Data Unit (PDU) session establishment request to the original SMF equipment, wherein the request carries an original URSP and a policy partition identifier (PSI) of the original URSP;

determining a target URSP corresponding to the PSI;

checking the original URSP according to the target URSP;

if the data network name DNN in the target URSP is consistent with the DNN in the original URSP, the network slice selection auxiliary information S-NSSAI in the target URSP is consistent with the S-NSSAI in the original URSP, and other parameters in the target URSP are not consistent with other parameters in the original URSP, sending a second response message to the original SMF equipment; and the second response message is used for indicating the original SMF equipment to establish a PDU session with the terminal according to the target URSP.

2. The URSP verification method of claim 1, further comprising:

if the parameters in the target URSP correspond to the parameters in the original URSP one by one, sending a first response message to the original SMF equipment; the first response message is used for indicating the original SMF equipment to establish a PDU session with the terminal according to the original URSP.

3. The URSP verification method of claim 1, further comprising:

if the DNN in the target URSP is inconsistent with the DNN in the original URSP or the S-NSSAI in the target URSP is inconsistent with the S-NSSAI in the original URSP, sending a third response message to the original SMF equipment; the third response message is used for indicating the original SMF equipment to send reselection information to access and mobility management function (AMF) equipment according to the target URSP; and the reselection information is used for indicating the AMF equipment to select the target SMF equipment meeting the target URSP according to the target URSP.

4. A URSP checking apparatus, applied to a PCF device, comprising: the device comprises a receiving unit, a determining unit, a checking unit and a sending unit;

the receiving unit is used for receiving a terminal routing strategy URSP checking request from an original session management function SMF device; the URSP check request includes: the terminal sends a Protocol Data Unit (PDU) session establishment request to the original SMF equipment, wherein the request carries an original URSP and a policy partition identifier (PSI) of the original URSP;

the determining unit is configured to determine a target URSP corresponding to the PSI received by the receiving unit;

the checking unit is configured to check the original URSP according to the target URSP determined by the determining unit;

the sending unit is configured to send a second response message to the original SMF device if the data network name DNN in the target URSP checked by the checking unit is consistent with the DNN in the original URSP, the network slice selection assistance information S-NSSAI in the target URSP is consistent with the S-NSSAI in the original URSP, and other parameters in the target URSP are not consistent with other parameters in the original URSP; and the second response message is used for indicating the original SMF equipment to establish a PDU session with the terminal according to the target URSP.

5. The URSP checking apparatus of claim 4,

the sending unit is configured to send a first response message to the original SMF device if the parameters in the target URSP checked by the checking unit correspond to the parameters in the original URSP one to one; the first response message is used for indicating the original SMF equipment to establish a PDU session with the terminal according to the original URSP.

6. The URSP checking apparatus according to claim 4 or 5,

the sending unit is further configured to send a third response message to the original SMF device if the DNN in the target URSP checked by the checking unit is inconsistent with the DNN in the original URSP, or the S-NSSAI in the target URSP is inconsistent with the S-NSSAI in the original URSP; the third response message is used for indicating the original SMF equipment to send reselection information to access and mobility management function (AMF) equipment according to the target URSP; and the reselection information is used for indicating the AMF equipment to select the target SMF equipment meeting the target URSP according to the target URSP.

7. A URSP verification apparatus, comprising a memory and a processor; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus;

the processor executes the computer-executable instructions stored by the memory to cause the URSP checking apparatus to perform the URSP checking method of any one of claims 1-3 when the URSP checking apparatus is operating.

8. A computer-readable storage medium comprising computer-executable instructions that, when executed on a computer, cause the computer to perform the URSP verification method of any of claims 1-3.

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