CN115484657A - Information sending method, device, system and storage medium - Google Patents

Abstract

The disclosure provides an information sending method, device, system and storage medium, and relates to the field of wireless communication. The method includes: after receiving the service message, the first network SEPP identifies the destination identifier carried by the target domain name in the service message; and sends the service message to the second network SEPP corresponding to the destination according to the PLMN identifier and the destination identifier . When forwarding service messages, the SEPP of the present disclosure increases the identification of the destination identifier, and then forwards the service message to the SEPP corresponding to the destination of the corresponding network according to the PLMN identifier and the destination identifier, thereby reducing circuitous routing and getting rid of the number of SEPP deployments Constrained by peer operator influence.

Description

Information sending method, device, system and storage medium

technical field

The present disclosure relates to the field of wireless communication, and in particular, to an information sending method, device, system and storage medium.

Background technique

In the 5G core network inter-network roaming networking architecture, operators implement 5G signaling interconnection and security protection through SEPP (Security Edge Protection Proxy, Security Edge Protection Proxy). SEPP is based on PLMN (Public Lands Mobile Network, public land mobile network) ID for addressing. When two operators perform roaming and docking, usually there is only one PLMN ID for each. If the number of SEPPs of both parties is more than one or different, according to The PLMN ID can only be forwarded to the SEPP with fixed configuration, and cannot achieve flexible forwarding of routes, and cannot be forwarded to the SEPP in the region/province where the target NF (Network Function, network function) is located, resulting in circuitous routes and increasing the difficulty of operation and maintenance. Not flexible enough.

Contents of the invention

A technical problem to be solved by the present disclosure is to provide an information sending method, device, system and storage medium, which can reduce roundabout routing and get rid of the constraint that the number of SEPP deployments is influenced by the operator at the opposite end.

According to one aspect of the present disclosure, a method for sending information is proposed, including: after receiving the service message, the first network security edge protection agent SEPP identifies the destination identifier carried by the target domain name in the service message; and according to the public land mobile network PLMN The identifier and the destination identifier are used to send the service message to the second network SEPP corresponding to the destination.

In some embodiments, the service message includes a service discovery message sent by the network element of the network storage function NRF of the first network, and the information sending method further includes: the first network SEPP receives the service discovery response message returned by the second network SEPP, wherein the service discovery The response message includes the destination identifier of the target NF; and the service discovery response message is sent to the first network function NF network element through the first network NRF network element.

In some embodiments, the service message further includes a service request message sent by the network element of the first network NF, and the service request message includes the destination identifier of the target NF, wherein, the first network SEPP sends the service request message according to the PLMN identifier and the destination identifier. The request message is sent to the corresponding second network SEPP.

In some embodiments, the second network SEPP sends the service request message to the target NF according to the destination identifier of the target NF.

In some embodiments, when the NRF network element of the first network configures the information of the NRF network element of the second network, the destination identifier is added to the domain name information of the NRF network element of the second network.

In some embodiments, the NF network element of the second network carries the destination identifier when registering with the NRF network element of the second network.

In some embodiments, the destination identifier includes at least one of an area identifier and a province identifier.

According to another aspect of the present disclosure, an information sending device is also proposed, including: an identification identification module configured to identify the destination identification carried by the target domain name in the service message after receiving the service message; and a message transceiving module, It is configured to send the service message to the second network security edge protection proxy SEPP corresponding to the destination according to the public land mobile network PLMN identifier and the destination identifier.

In some embodiments, the service message includes a service discovery message sent by a network element of the network storage function NRF of the first network, wherein the message transceiving module is further configured to receive a service discovery response message returned by the second network SEPP, wherein the service discovery response The message includes the destination identifier of the target NF, and sends the service discovery response message to the first network function NF network element through the first network NRF network element.

In some embodiments, the service message further includes a service request message sent by the network element of the first network NF, and the service request message includes the destination identifier of the target NF, wherein the message transceiving module is configured to, according to the PLMN identifier and the destination identifier, The service request message is sent to the corresponding second network SEPP.

In some embodiments, the destination identifier includes at least one of an area identifier and a province identifier.

According to another aspect of the present disclosure, an information sending device is also proposed, including: a memory; and a processor coupled to the memory, the processor is configured to execute the above information sending method based on instructions stored in the memory.

According to another aspect of the present disclosure, an information sending system is also proposed, including: the above-mentioned information sending device; and a second network SEPP configured to receive a service message sent by the information sending device.

In some embodiments, the NRF network element of the second network is configured to receive a registration request from the NF network element of the second network, where the registration request includes a destination identifier, and return a service discovery response message to the SEPP of the second network, wherein the service The discovery response message includes the destination identifier of the target NF; and the NRF network element of the first network is configured to add the destination identifier to the domain name information of the NRF network element of the second network when configuring the information of the NRF network element of the second network .

According to another aspect of the present disclosure, a non-transitory computer-readable storage medium is also proposed, on which computer program instructions are stored, and when the instructions are executed by a processor, the above information sending method is implemented.

In the embodiment of the present disclosure, SEPP increases the identification of the destination identifier when forwarding the service message, and then forwards the service message to the SEPP corresponding to the destination of the corresponding network according to the PLMN identifier and the destination identifier, which reduces routing detours , to get rid of the constraint that the number of SEPP deployments is affected by the peer operator.

Other features of the present disclosure and advantages thereof will become apparent through the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which constitute a part of this specification, illustrate the embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.

The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

FIG. 1 is a schematic flowchart of some embodiments of the information sending method of the present disclosure;

FIG. 2 is a schematic flowchart of other embodiments of the information sending method of the present disclosure;

FIG. 3 is a schematic flowchart of other embodiments of the information sending method of the present disclosure;

FIG. 4 is a schematic flowchart of other embodiments of the information sending method of the present disclosure;

FIG. 5 is a schematic flowchart of other embodiments of the information sending method of the present disclosure;

FIG. 6 is a schematic flowchart of other embodiments of the information sending method of the present disclosure;

FIG. 7 is a schematic structural diagram of some embodiments of an information sending device of the present disclosure;

FIG. 8 is a schematic structural diagram of other embodiments of the information sending device of the present disclosure; and

Fig. 9 is a schematic structural diagram of some embodiments of the information sending system of the present disclosure.

detailed description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

The following description of at least one exemplary embodiment is merely illustrative in nature and in no way intended as any limitation of the disclosure, its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values.

It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic flowchart of some embodiments of the information sending method of the present disclosure.

In step 110, after receiving the service message, the first network SEPP identifies the destination identifier carried by the target domain name in the service message.

In some embodiments, the service message includes a service discovery message sent by an NRF (Network Repository Function, network storage function) network element of the first network, or a service request message sent by an NF network element of the first network.

The destination identifier includes an area identifier or a province identifier.

In some embodiments, the first network is a visited network or a home network. For example, when the NF network element of the home network registers with the NRF network element, an area identifier or a province identifier is added to the domain name. When configuring the information of the home network NRF NE on the visited network NRF NE, add the region or province identifier to the domain name information.

In step 120, according to the PLMN identifier and the destination identifier, the service message is sent to the second network SEPP corresponding to the destination.

If the first network is a visited network, the second network is a home network, and if the first network is a home network, the second network is a visited network.

The network receiving the service message can be determined according to the PLMN identifier, and the region or province where the SEPP receiving the service message is located can be determined according to the destination identifier.

In the above embodiment, when forwarding the service message, the identification of the destination identifier is added, and then the service message can be forwarded to the SEPP of the corresponding network corresponding to the destination according to the PLMN identifier and the destination identifier, which reduces routing detours and gets rid of The number of SEPP deployments is subject to the constraints of the peer operator.

Fig. 2 is a schematic flowchart of other embodiments of the information sending method of the present disclosure. In this embodiment, the first network is a visited network, and the second network is a home network as an example.

In step 210, the NF network element of the visited network initiates a service discovery request to the NRF network element of the visited network.

In step 220, the network element of the visited network NRF determines that the service discovery request needs to be sent to the user's home network NRF, and then sends the service discovery request to the visited network SEPP.

In some embodiments, the NRF network element of the visited network determines whether to send the service discovery request to the user's home network NRF according to information such as a number segment or a DNN (Data Network Name, Data Network Name).

The NRF network element of the visited network can forward the information sent to the NRF network element of the external network to the designated SEPP of the local network by configuring the SEPP routing information of the local network according to the pilot situation of inter-network roaming in the current network.

In step 230, the visited network SEPP judges whether the target domain name of the service discovery request carries an area identifier or a province identifier, and if so, executes step 240; otherwise, executes step 250.

The target domain name is the domain name of the NRF network element of the home network.

In step 240, the visited network SEPP forwards the service discovery request to the home network SEPP of the corresponding region or province according to the PLMN identifier and the region identifier or province identifier, and then step 260 is performed.

For example, in the signaling process shown in Figure 3, SEPP1 in the VPLMN (Visited Public Land Mobile Network) receives a Service Request (service request), and the signaling is, for example, (request URI=<NF- id>.nf.region-name/province_name.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org). Send the message to SEPP2 of the HPLMN (Home Public Land Mobile Network, belonging to the public land mobile network) according to region-name=north (the region is identified as the North District), or, according to region-name=south (the region is identified as the South District) The message is sent to SEPP3 of HPLMN.

In step 250, process according to the existing flow.

In step 260, the visited network SEPP receives the service discovery response message returned by the home network SEPP, wherein the service discovery response message includes the destination identifier of the target NF.

In some embodiments, the home network SEPP forwards the service discovery request to the home network NRF network element. After the home network NRF network element receives the request, the FQDN (Fully QualifiedDomain Name, fully qualified domain name) in the returned NF profile (configuration file) ) field contains a region ID or a province ID.

In the existing process, the FQDN field in the NF profile returned by the NRF network element of the home network does not contain the region identifier or the province identifier.

In step 270, the visited network SEPP sends the service discovery response message to the visited network NF network element through the visited network NRF network element.

In the signaling process shown in Figure 4, the NRF located in the serving PLMN queries the parameters of the NRF located in the home PLMN through each network element, and the signaling is, for example, GET.../nf-instances? <query parameters>, the NRF located in the home PLMN returns 200 OK to the NRF located in the serving PLMN (FQDN=<NF-id>.nf.region-name/province_name.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org ), where the FQDN field includes region-name or Province-name (province identifier).

In the above embodiment, in the service discovery process, the routing method of SEPP is enhanced to realize the forwarding of signaling messages by province or region, so that the 5G core network inter-network roaming interconnection solution is more flexible, and the operation and maintenance is reduced. difficulty.

Fig. 5 is a schematic flowchart of other embodiments of the information sending method of the present disclosure. In this embodiment, the first network is a visited network, and the second network is a home network as an example.

In step 510, the visited network NF sends a service request message to the visited network SEPP, and the service request message includes the destination identifier of the target NF.

Because the FQDN field in the NF profile returned by the service discovery process contains the region identifier or the province identifier, therefore, in the service request initiated by the visited network NF, the target address domain name includes the region identifier or the province identifier.

In step 520, the visited network SEPP sends the service request message to the corresponding home network SEPP according to the PLMN ID and the destination ID.

In step 530, the home network SEPP sends a service request message to the target NF network element.

In the above embodiment, in the service request process, by adding the area identifier and the province identifier, the SEPP of the visited network can send the service request message to the SEPP of the corresponding destination of the corresponding network, and then forward it to the target NF network element, reducing the routing Detours reduce the difficulty of operation and maintenance, and get rid of the constraint that the number of SEPP deployments is affected by the opposite operator.

Fig. 6 is a schematic flowchart of another embodiment of the information sending method of the present disclosure, the embodiment includes a service discovery process and a service request process. In this embodiment, vNRF represents the visited network NRF, vSEPP represents the visited network SEPP, hSEPP represents the home network SEPP, hNRF represents the home network NRF, NF Service Consumer represents the NF service user, and NF service Producer represents the NF service provider.

In step 610, when the NF service Producer registers with the hNRF located in the North District, it adds the region identifier and the province identifier to the domain name.

For example, NF service Producer sends Registration signaling to NRF, (FQDN=<NF-id>.nf.region_name/province_name.5gc.

mnc<MNC>.mcc<MCC>.3gppnetwork.org).

In step 620, the NF Service Consumer initiates a service discovery request to the vNRF. The signaling is, for example, Nnrf_NFDiscovery_Request.

In step 630, the vNRF receives the service discovery request, judges that it needs to be sent to the external network hNRF according to the number segment/DNN and other information, forwards the service discovery request to vSEPP, and the target URI (Uniform Resource Identifier, Uniform Resource Identifier) domain name carries the region/province logo.

The signaling is, for example, Nnrf_NFDiscovery_Request (target domain name=<hNRF-NF-id>.nf.region-name/province_name.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org).

In step 640, vSEPP judges that the target domain name carries region_name/province_name, and forwards the service discovery request to hSEPP of the corresponding region/province according to PLMN ID+region_name/province_name. For example, to hSEPP located in the North District.

The signaling is, for example, Nnrf_NFDiscovery_Request(region_name=north).

At step 650, the hSEPP forwards the service discovery request to the target hNRF.

The signaling is, for example, Nnrf_NFDiscovery_Request(region_name=north).

In step 660, the target hNRF returns target NF information to hSEPP, that is, the domain name of the NF service Producer, and the domain name includes the region/province identifier.

The signaling is, for example, Nnrf_NFDiscovery_Response (FQDN of NF=<NF-id>.nf.region-name/province_name.5gc.

mnc<MNC>.mcc<MCC>.3gppnetwork.org).

In step 670, hSEPP returns a service discovery response to vSEPP, carrying the region/province identifier of the NF service Producer.

The signaling is, for example, Nnrf_NFDiscovery_Response.

In step 680, the vSEPP returns a service discovery response to the vNRF, carrying the region/province identifier of the NF service Producer.

The signaling is, for example, Nnrf_NFDiscovery_Response.

When the vNRF configures the peer NRF information, add the region/province identifier to the domain name information.

At step 690, the vNRF returns a service discovery response to the NF Service Consumer.

The signaling is, for example, Nnrf_NFDiscovery_Response.

In step 6100, the NF Service Consumer initiates a service request to the vSEPP, and the target address is an NF in a different network.

The signaling is, for example, Service Request (target domain name=<NF-id>.nf.region-name/province_name.5gc.mnc.mcc.3gppnetwork.org).

In step 6110, the vSEPP forwards the service request message to the hSEPP of the corresponding region/province according to the PLMN ID+region_name/province_name of the target domain name.

The signaling is, for example, Service Request (region-name=north).

In step 6120, hSEPP sends the service request message to the target NF service Producer, that is, sends a Service Request.

In step 6130, the target NF service Producer returns a ServiceResponse to hSEPP.

In step 6140, hSEPP returns a Service Response to vSEPP.

In step 6150, vSEPP returns a Service Response to the NF Service Consumer.

In the above embodiment, when the NF registers with the NRF, the region/province identifier is added to the domain name information. When the visited NRF configures the home network NRF information, the domain name information is added with the region/province identifier. When the number of SEPPs between the roaming operators is more than one or not, when SEPP forwards the signaling, it increases the recognition of the region/province identifier, and forwards the signaling to the SEPP closest to the target NF according to the PLMN ID+region/province identifier, reducing path detours and O&M complexity , making the 5G core network roaming interconnection scheme more flexible.

FIG. 7 is a schematic structural diagram of some embodiments of an information sending device according to the present disclosure. The device is located in the SEPP of the first network, and includes an identification recognition module 710 and a message sending and receiving module 720 .

The identifier recognition module 710 is configured to recognize the destination identifier carried by the target domain name in the service message after receiving the service message.

In some embodiments, the service message includes a service discovery message sent by an NRF network element of the first network, or a service request message sent by an NF network element of the second network.

In some embodiments, the destination identification includes a region identification or a province identification.

The message transceiving module 720 is configured to send the service message to the second network SEPP corresponding to the destination according to the PLMN identifier and the destination identifier.

In some embodiments, if the service message is a service discovery message sent by an NRF network element of the first network, the message transceiving module 720 is further configured to receive a service discovery response message returned by the second network SEPP, wherein, in the service discovery response message Including the destination identifier of the target NF, the service discovery response message is sent to the NF network element of the first network through the NRF network element of the first network.

In some embodiments, if the service message is a service request message sent by a network element of the first network NF, and the service request message includes the destination identifier of the target NF, the message transceiving module 720 is configured to, according to the PLMN identifier and the destination identifier, The service request message is sent to the corresponding second network SEPP.

In the foregoing embodiments, if the first network is a visited network, the second network is a home network, and if the first network is a home network, the second network is a visited network.

In the above embodiment, by increasing the identification of the destination identifier, the service message can be forwarded to the SEPP corresponding to the destination of the corresponding network according to the PLMN identifier and the destination identifier, so that the routing function of the SEPP can be made more flexible, and route detours can be reduced. , to get rid of the constraint that the number of SEPP deployments is affected by the peer operator.

FIG. 8 is a schematic structural diagram of other embodiments of an information sending device of the present disclosure, and the device 800 includes a memory 810 and a processor 820 . Wherein: the storage 810 may be a disk, a flash memory or any other non-volatile storage medium. The memory is used to store the instructions in the above embodiments. Processor 820 is coupled to memory 810 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 820 is used to execute instructions stored in memory.

In some embodiments, processor 820 is coupled to memory 810 via BUS 830 . The device 800 can also be connected to an external storage system 850 through a storage interface 840 to call external data, and can also be connected to a network or another computer system (not shown) through a network interface 860 . No more detailed introduction here.

In this embodiment, the data instruction is stored in the memory, and the instruction is processed by the processor, so that the SEPP routing can be enhanced to reduce routing detours.

Fig. 9 is a schematic structural diagram of some embodiments of the information sending system of the present disclosure. The system includes the information sending device located in the first network SEPP 910 and the second network SEPP 920 in the above embodiment, wherein the information sending device has been introduced in detail in the above embodiment and will not be further elaborated here.

The second network SEPP 920 is configured to receive service messages sent by the first network SEPP 910 . The service message may be a service discovery message or a service request message. The second network SEPP 920 returns a service discovery response or a service request response to the first network SEPP 910 .

The system also includes a second network NRF network element 930 and a first network NRF network element 940 .

The second network NRF network element 930 is configured to receive a registration request from a second network NF network element, the registration request includes a destination identifier, and return a service discovery response message to the second network SEPP, wherein the service discovery response message includes a destination identifier NF's destination identifier.

The NRF network element 940 of the first network is configured to add the destination identifier to the domain name information of the NRF network element of the second network when configuring the information of the NRF network element of the second network. The network element 940 of the first network NRF receives the service discovery request, judges that it needs to be sent to the user's second network NRF according to information such as the number segment/DNN, and then sends the service discovery request to the SEPP of the local network.

In the foregoing embodiments, if the first network is a visited network, the second network is a home network, and if the first network is a home network, the second network is a visited network.

The above-mentioned embodiments can realize the forwarding of signaling messages according to provinces/regions, making the 5G core network inter-network roaming interconnection scheme more flexible, reducing routing circuitousness, reducing the difficulty of operation and maintenance, and getting rid of the constraint that the number of SEPP deployments is affected by the peer operator .

In some other embodiments, a computer-readable storage medium stores computer program instructions thereon, and when the instructions are executed by a processor, the steps of the methods in the above-mentioned embodiments are implemented. Those skilled in the art should understand that the embodiments of the present disclosure may be provided as methods, apparatuses, or computer program products. Accordingly, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. .

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each procedure and/or block in the flowchart and/or block diagram and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

So far, the present disclosure has been described in detail. Certain details known in the art have not been described in order to avoid obscuring the concept of the present disclosure. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only, rather than limiting the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims (15)

1. A method for sending information, comprising: After receiving the service message, the first network security edge protection agent SEPP identifies the destination identifier carried by the target domain name in the service message; and Send the service message to the second network SEPP corresponding to the destination according to the public land mobile network PLMN identifier and the destination identifier. 2. The information sending method according to claim 1, wherein the service message includes a service discovery message sent by a first network network storage function (NRF) network element, and the information sending method further includes: The first network SEPP receives the service discovery response message returned by the second network SEPP, where the service discovery response message includes the destination identifier of the target NF; and Send the service discovery response message to the first network network function NF network element through the first network NRF network element. 3. The information sending method according to claim 2, wherein the service message further includes a service request message sent by a network element of the first network NF, and the service request message includes a destination identifier of the target NF, wherein, The first network SEPP sends the service request message to the corresponding second network SEPP according to the PLMN identifier and the destination identifier. 4. The information sending method according to claim 3, further comprising: The second network SEPP sends the service request message to the target NF according to the destination identifier of the target NF. 5. The information sending method according to claim 2, further comprising: When the NRF network element of the first network configures the information of the NRF network element of the second network, the destination identifier is added to the domain name information of the NRF network element of the second network. 6. The information sending method according to claim 2, further comprising: When the NF network element of the second network registers with the NRF network element of the second network, it carries the destination identifier. 7. The information sending method according to any one of claims 1 to 6, wherein, The destination identifier includes at least one of an area identifier and a province identifier. 8. An information sending device, comprising: The identification identification module is configured to, after receiving the service message, identify the destination identification carried by the target domain name in the service message; and The message transceiving module is configured to send the service message to the second network security edge protection proxy SEPP corresponding to the destination according to the public land mobile network PLMN identifier and the destination identifier. 9. The information sending device according to claim 8, wherein the service message includes a service discovery message sent by a first network network storage function (NRF) network element, wherein, The message transceiving module is further configured to receive a service discovery response message returned by the second network SEPP, wherein the service discovery response message includes a destination identifier of the target NF, and pass the service discovery response message through the The NRF network element of the first network sends to the network function NF network element of the first network. 10. The information sending device according to claim 9, wherein the service message further includes a service request message sent by a network element of the first network NF, and the service request message includes a destination identifier of the target NF, wherein, The message transceiving module is configured to send the service request message to the corresponding second network SEPP according to the PLMN identifier and the destination identifier. 11. The information sending device according to any one of claims 8 to 10, wherein, The destination identifier includes at least one of an area identifier and a province identifier. 12. An information sending device, comprising: storage; and A processor coupled to the memory, the processor configured to execute the information sending method according to any one of claims 1 to 7 based on instructions stored in the memory. 13. An information sending system, comprising: The information sending device according to any one of claims 8 to 12; The second network SEPP is configured to receive the service message sent by the information sending device. 14. The information sending system according to claim 13, further comprising: The NRF network element of the second network is configured to receive the registration request of the NF network element of the second network, the registration request includes a destination identifier, and return a service discovery response message to the SEPP of the second network, wherein the service the destination identification of the target NF is included in the discovery response message; and The NRF network element of the first network is configured to add the destination identifier to the domain name information of the NRF network element of the second network when configuring the information of the NRF network element of the second network. 15. A non-transitory computer-readable storage medium, on which computer program instructions are stored, and when the instructions are executed by a processor, the information sending method according to any one of claims 1 to 7 is implemented.

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