CN115835176A

CN115835176A - Processing method, device and medium for EPLMN list in core network roaming scene

Info

Publication number: CN115835176A
Application number: CN202211354132.5A
Authority: CN
Inventors: 师瑜; 周晶; 丁志东
Original assignee: China United Network Communications Group Co Ltd
Current assignee: China United Network Communications Group Co Ltd
Priority date: 2022-11-01
Filing date: 2022-11-01
Publication date: 2023-03-21
Anticipated expiration: 2042-11-01
Also published as: CN115835176B

Abstract

The invention provides a processing method, a device and a medium of an EPLMN list under a core network roaming scene, wherein the method comprises the following steps: receiving an EPLMN list sent by home network core network equipment, wherein the EPLMN list carries a roaming PLMN of a visited network equivalent to a home PLMN of a home network; judging whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the capability information of the terminal and the pre-stored capability information of the visited network; if yes, deleting the roaming PLMN in the EPLMN list; if not, the roaming PLMN in the EPLMN list is reserved. The method, the device and the medium can solve the problem that the terminal is easy to have the situation that the voice service cannot be used and the user experience is seriously influenced when the terminal reselects or redirects to a visiting 5G network after the terminal receives the EPLMN list in the prior art.

Description

Processing method, device and medium for EPLMN list in core network roaming scene

Technical Field

The present invention relates to the field of network technologies, and in particular, to a method, an apparatus, and a medium for processing an EPLMN list in a core network roaming scenario.

Background

The 5G core network roaming refers to that in an independent networking (SA) mode, a home network side 5G user uses a 5G service in a 5G roaming area by accessing a visited network side 5G network. According to the scenes, the network architecture of the 5G core network roaming can be divided into the core network roaming under the scene of 'signal of home network' and the core network roaming under the scene of 'signal of no home network'. In a home Network signal scenario, when a 5G terminal is initially accessed, it needs to attach/register to a 4G/5G core Network of a home Network, and when the home 4G/5G Network expects that a user can enter a visited 5G Network under a condition of insufficient coverage, an Equivalent Public Land Mobile Network (EPLMN) list (EPLMN list) is issued to the terminal, and after receiving the EPLMN list, the terminal knows that a current PLMN (Public Land Mobile Network ) is an EPLMN, and the terminal meets a reselection requirement, or when the Network indicates that the terminal is redirected to a roaming PLMN, the terminal can be redirected to the visited 5G Network, however, after the terminal moves to the visited 5G Network, a situation that a voice service cannot be used easily occurs, and user experience is seriously affected.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a method, an apparatus, and a medium for processing an EPLMN list in a core network roaming scenario, so as to solve the problem in the prior art that after a terminal receives the EPLMN list, the terminal is easily unable to use a voice service by reselecting or redirecting to a visited 5G network, which seriously affects user experience.

In a first aspect, the present invention provides a method for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, which is applied to a terminal, and the method includes:

receiving an EPLMN list sent by home network core network equipment, wherein the EPLMN list carries a roaming PLMN of a visited network equivalent to a home PLMN of the home network;

judging whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the capability information of the terminal and the capability information of a prestored visited network;

if yes, deleting the roaming PLMN in the EPLMN list;

if not, the roaming PLMN in the EPLMN list is reserved.

Further, before the receiving the EPLMN list sent by the home network core network device, the method further includes:

sending an attach request/registration request to the home network core network device, where the attach request/registration request carries registration information of the terminal, and the registration information includes: the location information of the terminal, and/or the International Mobile Subscriber Identity (IMSI), and/or the International Mobile Equipment Identity (IMEI), and/or the international Mobile Subscriber Integrated Services Digital Network (MSISDN) of the terminal, so that the home network core network equipment judges whether the terminal meets the core network roaming condition according to the location information, and/or the IMSI, and/or the IMEI, and/or the MSISDN of the terminal;

the receiving the EPLMN list sent by the home network core network device specifically includes:

and receiving an attachment acceptance message/registration acceptance message which is sent by the core network equipment of the home network and carries the EPLMN list when the terminal is judged to meet the roaming condition of the core network.

Further, before the determining whether the roaming PLMN in the EPLMN list needs to be deleted according to the capability information of the terminal and the pre-stored capability information of the visited network, the method further includes:

acquiring and storing the capability information of the visit network from a core network roaming platform; or,

acquiring and storing the capability information of the visiting network through a palm business hall application program of a home network; or,

and receiving and storing the capability information of the visited network, which is sent by the core network equipment of the home network.

Further, the determining whether to delete the roaming PLMN in the EPLMN list according to the capability information of the terminal and the pre-stored capability information of the visited network specifically includes:

and judging whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the VoNR capability of the new air interface voice of the terminal and/or the EPS FB capability of the evolved packet switched domain fallback and the VoNR capability and the EPS FB capability of the visited network.

Further, the determining, according to the new voice over air interface (VoNR) capability and/or evolved packet switching (EPS FB) capability of the terminal and the VoNR capability and EPS FB capability of the visited network, whether the roaming PLMN in the EPLMN list needs to be deleted specifically includes at least one of:

if the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, determining that the roaming PLMN in the EPLMN list is not required to be deleted;

if the visited network supports VoNR capability and EPS FB capability, the terminal does not support VoNR capability and EPS FB capability and is a non-voice terminal, judging that the roaming PLMN in the EPLMN list does not need to be deleted;

if the visited network supports the VoNR capability but does not support the EPS FB capability, and the terminal supports the VoNR capability, judging that the roaming PLMN in the EPLMN list does not need to be deleted;

if the visited network supports the VoNR capability but not the EPS FB capability, and the terminal does not support the VoNR capability but supports the EPS FB capability, determining that the roaming PLMN in the EPLMN list needs to be deleted;

if the visited network supports the VoNR capability but does not support the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, judging that the roaming PLMN in the EPLMN list is not required to be deleted;

if the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the EPS FB capability, judging that the roaming PLMN in the EPLMN list does not need to be deleted;

if the visited network does not support the VoNR capability but supports the EPS FB capability, the terminal supports the VoNR capability but does not support the EPS FB capability, and the roaming PLMN in the EPLMN list needs to be deleted;

if the visited network does not support the VoNR capability but supports the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, judging that the roaming PLMN in the EPLMN list does not need to be deleted;

if the visited network does not support the VoNR capability or the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, determining that the roaming PLMN in the EPLMN list needs to be deleted;

and if the visited network does not support the VoNR capability and the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, judging that the roaming PLMN in the EPLMN list is not required to be deleted.

Further, after the deleting the roaming PLMN in the EPLMN list, the method further comprises:

and deleting the frequency point of the visit network in the supported frequency band information.

In a second aspect, the present invention provides a method for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, which is applied to a core network device of a home network, and the method includes:

and sending an EPLMN list to the terminal, wherein the EPLMN list carries roaming PLMN of a visited network equivalent to home PLMN of the home network, so that the terminal judges whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the self capability information and the pre-stored capability information of the visited network, and deletes the roaming PLMN in the EPLMN list when the judgment result is yes, and retains the roaming PLMN in the EPLMN list when the judgment result is no.

Further, the sending the EPLMN list to the terminal specifically includes:

judging whether the terminal meets the roaming condition of the core network;

and if so, sending the EPLMN list to the terminal.

Further, before the determining whether the terminal meets the core network roaming condition, the method further includes:

receiving an attach request/registration request sent by the terminal, where the attach request/registration request carries registration information of the terminal, and the registration information includes: the terminal comprises position information of the terminal, and/or an International Mobile Subscriber Identity (IMSI), and/or an International Mobile Equipment Identity (IMEI), and/or an international Mobile Subscriber Integrated Services Digital Network (MSISDN);

the determining whether the terminal meets the core network roaming condition specifically includes:

and judging whether the terminal meets the roaming condition of the core network or not according to the position information, and/or the IMSI, and/or the IMEI, and/or the MSISDN of the terminal.

Further, the sending the EPLMN list to the terminal specifically includes:

and sending an attachment acceptance message/registration acceptance message carrying the EPLMN list to the terminal.

Further, before the attach accept message/register accept message further carries the capability information of the visited network, and the method sends the attach accept message/register accept message carrying the EPLMN list to the terminal, the method further includes:

and acquiring the capability information of the visited network, wherein the capability information of the visited network comprises a new air interface voice (VoNR) capability and an evolved packet circuit domain fallback (EPS FB) capability.

In a third aspect, the present invention provides a device for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, where the device is disposed in a terminal, and the device includes:

the system comprises a list receiving module, a list sending module and a list sending module, wherein the list receiving module is used for receiving an EPLMN list sent by home network core network equipment, and the EPLMN list carries a roaming PLMN of a visited network equivalent to a home PLMN of a home network;

a deletion judging module, connected to the list receiving module, for judging whether the roaming PLMN in the EPLMN list needs to be deleted according to the capability information of the terminal and the pre-stored capability information of the visited network;

the first processing module is connected with the deletion judging module and is used for deleting the roaming PLMN in the EPLMN list when the judgment result of the deletion judging module is yes;

and the second processing module is connected with the deletion judging module and is used for keeping the roaming PLMN in the EPLMN list when the judgment result of the deletion judging module is negative.

In a fourth aspect, the present invention provides an apparatus for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, where the apparatus is disposed in a core network device of a home network, and the apparatus includes:

the list sending module is used for sending an EPLMN list to the terminal, wherein the EPLMN list carries roaming PLMN of a visited network equivalent to the home PLMN of the home network, so that the terminal judges whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the self capability information and the pre-stored capability information of the visited network, and when the judgment result is yes, the roaming PLMN in the EPLMN list is deleted, and when the judgment result is no, the roaming PLMN in the EPLMN list is reserved.

In a fifth aspect, the present invention provides an apparatus for processing a peer-to-peer public land mobile network EPLMN list in a core network roaming scenario, including a memory and a processor, where the memory stores a computer program, and the processor is configured to execute the computer program to implement the method for processing the peer-to-peer public land mobile network EPLMN list in the core network roaming scenario described in the first aspect or the second aspect.

In a sixth aspect, the present invention provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the method for processing the peer-to-peer public land mobile network EPLMN list in the core network roaming scenario of the first aspect or the second aspect.

According to the processing method, device and medium of the EPLMN list in the core network roaming scene, when a terminal receives the EPLMN list sent by home network core network equipment, whether the roaming PLMN in the EPLMN list needs to be deleted is judged according to the capability information of the terminal and the pre-stored capability information of a visited network, if yes, the roaming PLMN in the EPLMN list is deleted, so that when the terminal cannot use the voice service of the visited network, the terminal does not roam to the visited network through reselection or redirection, frequent network selection operation of the terminal can be reduced, user experience is improved, and if not, the roaming PLMN in the EPLMN list is reserved, so that when the terminal can use the voice service of the visited network, roaming to the visited network through reselection or redirection is achieved, the problem that the voice service cannot be used easily when the terminal receives the EPLMN list in the prior art is solved, and the user experience is seriously affected.

Drawings

Fig. 1 is a schematic diagram of a core network roaming architecture in a home network signal scenario according to an embodiment of the present invention;

fig. 2 is a flowchart of a processing method of a peer-to-peer public land mobile network EPLMN list in a core network roaming scenario according to embodiment 1 of the present invention;

fig. 3 is a flowchart of a processing method of a peer-to-peer public land mobile network EPLMN list in a core network roaming scenario according to embodiment 2 of the present invention;

fig. 4 is a schematic structural diagram of a processing apparatus for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario according to embodiment 3 of the present invention;

fig. 5 is a schematic structural diagram of a processing apparatus for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario according to embodiment 4 of the present invention;

fig. 6 is a schematic structural diagram of a processing device for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario according to embodiment 5 of the present invention.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present invention, the following detailed description will be made with reference to the accompanying drawings.

It is to be understood that the specific embodiments and figures described herein are merely illustrative of the invention and are not limiting of the invention.

It is to be understood that the embodiments and features of the embodiments can be combined with each other without conflict.

It is to be understood that, for the convenience of description, only parts related to the present invention are shown in the drawings of the present invention, and parts not related to the present invention are not shown in the drawings.

It should be understood that each unit and module related in the embodiments of the present invention may correspond to only one physical structure, may also be composed of multiple physical structures, or multiple units and modules may also be integrated into one physical structure.

It will be understood that, without conflict, the functions, steps, etc. noted in the flowchart and block diagrams of the present invention may occur in an order different from that noted in the figures.

It is to be understood that the flowchart and block diagrams of the present invention illustrate the architecture, functionality, and operation of possible implementations of systems, apparatus, devices and methods according to various embodiments of the present invention. Each block in the flowchart or block diagrams may represent a unit, module, segment, code, which comprises executable instructions for implementing the specified function(s). Furthermore, each block or combination of blocks in the block diagrams and flowchart illustrations can be implemented by a hardware-based system that performs the specified functions or by a combination of hardware and computer instructions.

It is to be understood that the units and modules involved in the embodiments of the present invention may be implemented by software, and may also be implemented by hardware, for example, the units and modules may be located in a processor.

Summary of the application

In recent years, 5G technology is rapidly developed, however, the deployment investment cost of a 5G network is high, and the development speed of the 5G network is greatly restricted, so that the 5G shared network technology is more and more concerned as a network cost optimization mode, and a 5G co-established shared network is divided into two network architectures, namely, 5G access network sharing and 5G core network roaming. The roaming of the 5G core network refers to that, in an independent networking (SA) mode, a home network side 5G user uses a 5G service in a 5G roaming area by accessing a visited network side 5G network. The 5G access networks and the core networks of the two parties of the 5G core network roaming operator are independently constructed and managed, and users independently manage. The main stream 5G core network roaming is realized by adopting a home routing mode, namely roaming user data returns to a home network, and services are provided by the home network. In a network providing 5G core network roaming, a data service, an IMS (IP Multimedia Subsystem) based voice/video service, and an SMS over IP short message service should be provided to a user, and both parties of an operator providing the 5G core network roaming service should provide corresponding services to a roaming user based on an internetwork roaming agreement.

At present, according to different scenes, a network architecture of 5G core network roaming can be divided into core network roaming in a scene of "having a home network signal" and core network roaming in a scene of "not having a home network signal". The core network roaming defined by 3GPP mainly refers to an international roaming scenario, that is, when there is no home network signal, the terminal may Access using a visited network 5G service, there are no N26 interface and N14 interface between the 4G/5G core network of the home network and the 5G core network of the roaming network, the N26 interface is an interface between a home network MME (Mobility Management Entity) and a roaming network AMF (Access and Mobility Management Function), and the N14 interface is an interface between the home network AMF and the roaming network AMF. However, in many areas, when there is a home 4G network, the user also wants to be able to access and use the 5G network, and therefore, core network roaming with home network signaling is also very important.

Fig. 1 shows a schematic diagram of a core network roaming architecture in a home network signal scenario, where in the home network signal scenario, a 5G terminal needs to attach/register to a 4G/5G core network of a home network first when initially accessing, and when the home 4G/5G network desires that a user can enter a visited 5G network under a condition of insufficient coverage, an EPLMN list (EPLMN list) is issued to the terminal, a roaming PLMN of the visited network is set as an equivalent PLMN of the home network, and the roaming PLMN is set as a high-priority PLMN. For example, the operator a and the operator B deploy a core network roaming scheme in a signal scenario, and the operator B may provide a Voice Over New Radio (VoNR) Voice service for the user UEA of the operator a, but cannot provide an EPS FB (evolved packet circuit domain Fallback) service for the user of the operator a because the operator B does not open an N26 interface with the operator a. When the UEA attaches/registers to the network a, the 4G/5G network of the operator a issues the EPLMN list to the UEA, and sets the PLMN a and the PLMN X as equivalent PLMNs, and then the UEA can meet the requirements of reselecting and redirecting from the operator network a to the 5G network of the operator B. However, a terminal supporting the VoNR and a terminal not supporting the VoNR coexist in the network of the operator a, and when the terminal UEA not supporting the VoNR roams to the 5G network of the operator B, the network of the operator B cannot provide the voice service for the UEA, and the terminal may return to 4G in an off-line re-search manner or cannot use the voice service, which greatly affects user experience.

In view of the above technical problems, the present application provides a method, an apparatus, and a medium for processing an EPLMN list in a core network roaming scenario, where when a terminal receives an EPLMN list sent by a home network core network device, it determines whether the roaming PLMN in the EPLMN list needs to be deleted according to capability information of the terminal and pre-stored capability information of a visited network, and if so, deletes the roaming PLMN in the EPLMN list, so that when the terminal cannot use a voice service of the visited network, roaming to the visited network is not performed by reselection or redirection, and frequent network selection operations of the terminal can be reduced, which improves user experience, and if not, the roaming PLMN in the EPLMN list is retained, so that roaming to the visited network can be performed by reselection or redirection when the terminal can use the voice service of the visited network.

Having described the general principles of the present application, various non-limiting embodiments of the present application will now be described with reference to the accompanying drawings.

Example 1:

the embodiment provides a method for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, which is applied to a terminal, and as shown in fig. 2, the method includes:

step S101: receiving an EPLMN list sent by core network equipment of a home network, wherein the EPLMN list carries roaming PLMN of a visited network equivalent to the home PLMN of the home network.

In this embodiment, when the home network is a 4G network, the home network core network device may be an MME of the home network, and when the home network is a 5G network, the home network core network device may be an AMF of the home network.

Optionally, before receiving the EPLMN list sent by the home network core network device, the method may further include:

sending an attach request/registration request to the home network core network device, where the attach request/registration request carries registration information of the terminal, and the registration information includes: the location information of the terminal, and/or an IMSI (International Mobile Subscriber Identity), and/or an IMEI (International Mobile Equipment Identity), and/or an MSISDN (International Mobile Subscriber integrated services digital network), so that the home network core network device determines whether the terminal meets a core network roaming condition according to the location information of the terminal, and/or the IMSI, and/or the IMEI, and/or the MSISDN.

In this embodiment, when the terminal attaches to the 4G home network, the attach request (attach request) is sent to the core network device of the home network, where the attach request carries the Registration information of the terminal, and when the terminal registers in the 5G home network, the Registration request (Registration request) is sent to the core network device of the home network, where the Registration information of the terminal is carried. The registration information may include: the location information of the terminal, such as TAC (Tracking Area Code), IMSI, IMEI, MSISDN, IMS (IP Multimedia Subsystem) Voice capability (IMS PS Voice preferred, IMS packet domain Voice preferred, CS Voice as secondary, circuit domain Voice preferred second), short message capability, emergency call capability, and the like, is directly sent to the home network core network through NAS messages.

In this embodiment, different operators may set different core network roaming conditions according to implementation situations, for example, the home network core network device may determine whether the terminal satisfies the core network roaming condition only according to TAC location information or IMSI of the terminal, or may determine whether the terminal satisfies the core network roaming condition according to a combination of the TAC location information and the IMSI.

Optionally, the receiving the EPLMN list sent by the home network core network device specifically includes:

In this embodiment, when the core network device of the home network determines that the terminal meets the core network roaming condition, an EPLMN list is configured for the terminal, so as to set the roaming PLMN of the visited network as an equivalent PLMN of the home network, and the terminal does not need to report the VoNR capability, and the EPLMN list is sent to the terminal through an attach accept message (attach accept)/Registration accept message (Registration accept).

Step S102: judging whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the capability information of the terminal and the pre-stored capability information of the visited network;

in this embodiment, the terminal may obtain and store the capability information of the visited network in advance, where the capability information of the visited network may include a VoNR capability, an EPS FB capability, an IMS emergency call capability, and so on.

Optionally, before determining whether to delete the roaming PLMN in the EPLMN list according to the capability information of the terminal and the capability information of the pre-stored visited network, the method further includes:

In this embodiment, the terminal may acquire and store the capability information of the visited network in advance through any one of the following manners:

a) The terminal directly acquires the capability information of the visited network from the core network roaming platform;

b) The terminal acquires the capability of the visiting network through a third-party platform (considering that the home network and the visiting network may not have capability intercommunication interfaces and may not be capable of transmitting information), and the third-party platform only issues the capability information of the home network and the visiting network aiming at the terminal, so that the home network and the visiting network do not need to know the states of the home network and the visiting network in real time, and the problems of mutual data transmission and safety brought by an open interface between operators are solved. The third party platform can be, for example, a palm business hall APP of the home network, and as long as the terminal successfully resides on the home network, the palm business hall APP pushes the capability information of the visited network to the terminal in real time;

c) The home network and the visited network communicate the capability information in advance, namely the core network of the home network and the core network of the visited network both pre-store the capability information of both sides, and the home network core network equipment can send the capability information of the visited network to the terminal through the attachment acceptance message/registration acceptance message.

In this embodiment, it may be specifically determined whether the roaming PLMN in the EPLMN list needs to be deleted according to the VoNR capability and/or the EPS FB capability of the terminal and the VoNR capability and the EPS FB capability of the visited network.

Optionally, the determining, according to the VoNR capability and/or the EPS FB capability of the terminal and the VoNR capability and the EPS FB capability of the visited network, whether to delete the roaming PLMN in the EPLMN list specifically includes at least one of the following:

if the visited network supports the VoNR capability and the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, judging that the roaming PLMN in the EPLMN list is not required to be deleted;

if the visited network does not support the VoNR capability but supports the EPS FB capability, and the terminal supports the VoNR capability but does not support the EPS FB capability, determining that the roaming PLMN in the EPLMN list needs to be deleted;

if the visited network does not support the VoNR capability but supports the EPS FB capability, the terminal does not support the VoNR capability and the EPS FB capability and is a non-voice terminal, judging that the roaming PLMN in the EPLMN list is not required to be deleted;

if the visited network does not support the VoNR capability or the EPS FB capability, the terminal does not support the VoNR capability or the EPS FB capability, and the terminal is a non-voice terminal, it is determined that the roaming PLMN in the EPLMN list does not need to be deleted.

In this embodiment, after obtaining the EPLMN list, the terminal finds that the roaming PLMN (PLMNIDB) of the visited network is equivalent to the home PLMN (PLMNIDA) of the home network, and then starts to check the capability information of the terminal and the visited network, so as to determine whether the roaming PLMN in the EPLMN list needs to be deleted, for example, it may be determined whether the roaming PLMN in the EPLMN list needs to be deleted according to table 1, as shown in table 1, if the determination result is needed, it indicates that the roaming PLMN in the EPLMN list needs to be deleted, and if the determination result is not needed, it indicates that the roaming PLMN in the EPLMN list is retained.

Table 1: the corresponding relation between the capability information of the terminal and the visited network and whether the roaming PLMN needs to be deleted or not is as follows:

in this embodiment, on the basis of the VoNR capability and the EPS FB capability, it may further be determined whether the roaming PLMN in the EPLMN list needs to be deleted according to other capabilities, such as:

(a) The terminal supports visiting network frequency points, supports EPSFB and does not support VoNR; the visited network supports VoNR and does not support EPSFB, and the roaming PLMN in the EPLMN list needs to be deleted for the terminal with voice priority; for the terminal with data priority, the roaming PLMN in the EPLMN list does not need to be deleted (the mobile phone type terminal can not perform voice service on the visited network);

(b) The terminal does not support visiting network frequency points, EPSFB and VoNR; the visited network supports VoNR and supports EPSFB, and then the roaming PLMN in the EPLMN list needs to be deleted (since the terminal does not support the visited network frequency point, the terminal cannot be accessed to the visited network);

(c) The terminal supports visited network frequency points, supports EPSFB, supports VoNR, supports IMS emergency call, supports VoNR, does not support EPSFB, does not support IMS emergency call, and needs to delete roaming PLMN in EPLMN list (although the terminal meets core network roaming conditions, the terminal needs to return to home network for emergency call service);

(d) The visited network supports VoNR and EPSFB but does not support IMS emergency call, and the terminal supports EPSFB, voNR and IMS emergency call, so that the roaming PLMN in the EPLMN list does not need to be deleted.

Step S103: and if so, deleting the roaming PLMN in the EPLMN list.

In this embodiment, when it is determined that the roaming PLMN in the EPLMN list needs to be deleted according to the capability information of the terminal and the pre-stored capability information of the visited network, the roaming PLMN in the EPLMN list is deleted, so that it can be ensured that the terminal roams to the visited network without reselection or redirection when the terminal cannot use the voice service of the visited network, and the frequent network selection operation of the terminal can be reduced, thereby improving the user experience.

Optionally, after the deleting the roaming PLMN in the EPLMN list, the method further includes:

In this embodiment, in order to more thoroughly avoid the misoperation to the visited network, the terminal updates its own capability information, that is, deletes the frequency point information of the visited network in the supported frequency band information, and the home network does not require the terminal to redirect or switch to the visited network frequency point.

Step S104: if not, the roaming PLMN in the EPLMN list is reserved.

In this embodiment, when it is determined that it is not necessary to delete the roaming PLMN in the EPLMN list according to the capability information of the terminal and the pre-stored capability information of the visited network, the roaming PLMN in the EPLMN list is retained, so that it is ensured that the terminal can roam to the visited network by reselection or redirection when the terminal can use the voice service of the visited network.

According to the processing method of the peer-to-peer public land mobile network EPLMN list in the core network roaming scene provided by the embodiment of the invention, when the terminal receives the EPLMN list sent by the home network core network equipment, whether the roaming PLMN in the EPLMN list needs to be deleted is judged according to the capability information of the terminal and the pre-stored capability information of the visited network, if so, the roaming PLMN in the EPLMN list is deleted, so that when the terminal cannot use the voice service of the visited network, roaming to the visited network is not carried out through reselection or redirection, the frequent network selection operation of the terminal can be reduced, the user experience is improved, and if not, the roaming PLMN in the EPLMN list is reserved, so that when the terminal can use the voice service of the visited network, roaming to the visited network can be carried out through reselection or redirection, and the problem that the voice service cannot be used easily when the terminal receives the EPLMN list in the prior art and is reselected or redirected to the visited network is solved, and the user experience is seriously influenced.

Example 2:

as shown in fig. 3, this embodiment provides a method for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, which is applied to a core network device of a home network, and the method includes:

step S201: and sending an EPLMN list to the terminal, wherein the EPLMN list carries a roaming PLMN of a visited network equivalent to a home PLMN of the home network, so that the terminal judges whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the self capability information and the pre-stored capability information of the visited network, deletes the roaming PLMN in the EPLMN list when the judgment result is yes, and retains the roaming PLMN in the EPLMN list when the judgment result is no.

Optionally, the sending the EPLMN list to the terminal specifically includes:

judging whether the terminal meets the roaming condition of the core network;

and if so, sending the EPLMN list to the terminal.

Optionally, before determining whether the terminal satisfies the core network roaming condition, the method further includes:

and judging whether the terminal meets the roaming condition of the core network or not according to the position information, and/or IMSI, and/or IMEI, and/or MSISDN of the terminal.

Optionally, the sending the EPLMN list to the terminal specifically includes:

In this embodiment, when the core network device of the home network determines that the terminal satisfies the core network roaming condition, an EPLMN list is configured for the terminal, so as to set the roaming PLMN of the visited network as an equivalent PLMN of the home network, and without the terminal reporting the VoNR capability, and the EPLMN list is sent to the terminal through an attach accept message (attach accept)/Registration accept message (Registration accept).

Optionally, before the attach accept message/registration accept message further carries capability information of the visited network, and the method further includes:

In this embodiment, the home network and the visited network communicate capability information in advance, that is, the core network of the home network and the core network of the visited network both have capability information of both sides in advance, and the home network core network device may send the capability information of the visited network to the terminal through the attach accept message/the register accept message.

Example 3:

as shown in fig. 4, the present embodiment provides a device for processing an equivalent public land mobile network EPLMN list in a core network roaming scenario, which is disposed in a terminal and configured to execute a method for processing an equivalent public land mobile network EPLMN list in a core network roaming scenario in embodiment 1, where the device includes:

a list receiving module 11, configured to receive an EPLMN list sent by a core network device of a home network, where the EPLMN list carries a roaming PLMN of a visited network equivalent to a home PLMN of the home network;

a deletion judging module 12, connected to the list receiving module 11, for judging whether to delete the roaming PLMN in the EPLMN list according to the capability information of the terminal and the capability information of the pre-stored visited network;

a first processing module 13, connected to the deletion judging module 12, configured to delete the roaming PLMN in the EPLMN list if the deletion judging module judges that the result is yes;

a second processing module 14, connected to the deletion judging module 12, configured to, if the result of the deletion judging module is negative, retain the roaming PLMN in the EPLMN list.

Optionally, the apparatus further comprises:

a request sending module, configured to send an attach request/registration request to the core network device of the home network, where the attach request/registration request carries registration information of the terminal, and the registration information includes: the location information of the terminal, and/or the International Mobile Subscriber Identity (IMSI), and/or the International Mobile Equipment Identity (IMEI), and/or the international Mobile Subscriber Integrated Services Digital Network (MSISDN) of the terminal, so that the home network core network equipment judges whether the terminal meets the core network roaming condition according to the location information, and/or the IMSI, and/or the IMEI, and/or the MSISDN of the terminal;

the list receiving module 11 is specifically configured to receive an attach accept message/registration accept message that is sent by the home network core network device and carries the EPLMN list when determining that the terminal meets the core network roaming condition.

Optionally, the apparatus further comprises:

the visit capability acquisition module is used for acquiring and storing the capability information of the visit network from the core network roaming platform; or, acquiring and storing the capability information of the visiting network through a palm business hall application program of the home network; or, receiving and storing the capability information of the visited network sent by the home network core network device.

Optionally, the deletion judging module 12 is specifically configured to:

Optionally, the deletion determining module 12 is specifically configured to at least one of:

if the visited network supports the VoNR capability and the EPS FB capability, and the terminal supports at least one of the VoNR capability and the EPS FB capability, it is determined that the roaming PLMN in the EPLMN list does not need to be deleted;

if the visited network does not support the VoNR capability but supports the EPS FB capability and the terminal supports the EPS FB capability, judging that the roaming PLMN in the EPLMN list does not need to be deleted;

Optionally, the apparatus further comprises:

and the frequency point deleting module is used for deleting the frequency point of the visit network in the supported frequency band information.

Example 4:

as shown in fig. 5, the present embodiment provides a device for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, where the device is disposed in a core network device of a home network and configured to execute the method for processing the EPLMN list of the peer-to-peer public land mobile network in the core network roaming scenario in embodiment 2, and the device includes:

a list sending module 21, configured to send an EPLMN list to the terminal, where the EPLMN list carries a roaming PLMN of a visited network equivalent to a home PLMN of the home network, so that the terminal determines, according to capability information of the terminal and pre-stored capability information of the visited network, whether to delete the roaming PLMN in the EPLMN list, and when a determination result is yes, deletes the roaming PLMN in the EPLMN list, and when a determination result is no, retains the roaming PLMN in the EPLMN list.

Optionally, the list sending module 21 specifically includes:

a roaming condition judging unit, configured to judge whether the terminal satisfies a core network roaming condition;

and the list sending unit is used for sending the EPLMN list to the terminal when the judgment result of the roaming condition judgment unit is yes.

Optionally, the apparatus further comprises:

a request receiving module, configured to receive an attach request/registration request sent by the terminal, where the attach request/registration request carries registration information of the terminal, and the registration information includes: the terminal comprises position information of the terminal, and/or an International Mobile Subscriber Identity (IMSI), and/or an International Mobile Equipment Identity (IMEI), and/or an international Mobile Subscriber Integrated Services Digital Network (MSISDN);

the roaming condition judging unit is specifically configured to judge whether the terminal satisfies a core network roaming condition according to the location information of the terminal, and/or the IMSI, and/or the IMEI, and/or the MSISDN.

Optionally, the list sending module 21 is specifically configured to send an attach accept message/registration accept message carrying the EPLMN list to the terminal.

Optionally, the attach accept message/registration accept message further carries capability information of the visited network, and the apparatus further includes:

and the capability acquisition module is used for acquiring the capability information of the visited network, wherein the capability information of the visited network comprises a new air interface voice (VoNR) capability and an evolved packet circuit domain fallback (EPS FB) capability.

Example 5:

referring to fig. 6, the present embodiment provides an apparatus for processing a peer-to-peer public land mobile network EPLMN list in a core network roaming scenario, including a memory 31 and a processor 32, where the memory 31 stores a computer program, and the processor 32 is configured to run the computer program to perform the processing method of the peer-to-peer public land mobile network EPLMN list in the core network roaming scenario in embodiment 1 or embodiment 2.

The memory 31 is connected to the processor 32, the memory 31 may be a flash memory, a read-only memory or other memories, and the processor 32 may be a central processing unit or a single chip microcomputer.

Example 6:

this embodiment provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, implements the processing method for the peer-to-peer public land mobile network EPLMN list in the core network roaming scenario in embodiment 1 or embodiment 2.

The computer-readable storage media include volatile or nonvolatile, removable or non-removable media implemented in any method or technology for storage of information such as computer-readable instructions, data structures, computer program modules or other data. Computer-readable storage media include, but are not limited to, RAM (Random Access Memory), ROM (Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), flash Memory or other Memory technology, CD-ROM (Compact disk Read-Only Memory), digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.

Embodiments 2 to 6 provide a method, an apparatus, and a medium for processing an EPLMN list in a core network roaming scenario, where when a terminal receives an EPLMN list sent by a home network core network device, it is determined whether the roaming PLMN in the EPLMN list needs to be deleted according to capability information of the terminal and capability information of a pre-stored visited network, and if so, the roaming PLMN in the EPLMN list is deleted, so that it can be ensured that when the terminal cannot use a voice service of the visited network, roaming to the visited network is not performed through reselection or redirection, and frequent network selection operations of the terminal can be reduced, user experience is improved, and if not, the roaming PLMN in the EPLMN list is retained, so that when the terminal can use the voice service of the visited network, roaming to the visited network can be performed through reselection or redirection, and a problem that when the terminal receives the EPLMN list in the related art, the terminal easily reselects or redirects to the visited 5G network to cause a situation that the terminal cannot use the voice service is solved, and user experience is seriously affected.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A processing method of an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario is applied to a terminal, and the method comprises the following steps:

receiving an EPLMN list sent by home network core network equipment, wherein the EPLMN list carries a roaming PLMN of a visited network equivalent to a home public land mobile network PLMN of a home network;

judging whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the capability information of the terminal and the pre-stored capability information of the visited network;

if yes, deleting the roaming PLMN in the EPLMN list;

if not, the roaming PLMN in the EPLMN list is reserved.

2. The method of claim 1, wherein before receiving the EPLMN list sent by the home network core network device, the method further comprises:

the receiving an EPLMN list sent by a core network device of a home network specifically includes:

3. The method of claim 1, wherein before determining whether the roaming PLMN in the EPLMN list needs to be deleted according to the capability information of the terminal and the pre-stored capability information of the visited network, the method further comprises:

4. The method according to claim 1, wherein the determining whether the roaming PLMN in the EPLMN list needs to be deleted according to the capability information of the terminal and the pre-stored capability information of the visited network specifically includes:

5. The method according to claim 4, wherein the determining whether the roaming PLMN in the EPLMN list needs to be deleted according to a new air interface voice (VoNR) capability and/or an evolved packet circuit domain fallback (EPS FB) capability of the terminal and a VoNR capability and an EPS FB capability of a visited network specifically includes at least one of:

if the visited network supports the VoNR capability but does not support the EPS FB capability, and the terminal does not support the VoNR capability but supports the EPS FB capability, it is determined that the roaming PLMN in the EPLMN list needs to be deleted;

6. The method of claim 5, wherein after the deleting the roaming PLMN in the EPLMN list, the method further comprises:

7. A processing method of a peer-to-peer public land mobile network (EPLMN) list in a core network roaming scenario is applied to a home network core network device, and the method comprises the following steps:

sending an EPLMN list to the terminal, wherein the EPLMN list carries roaming PLMN of a visited network equivalent to a home public land mobile network PLMN of the home network, so that the terminal judges whether the roaming PLMN in the EPLMN list needs to be deleted or not according to the capability information of the terminal and the prestored PLMN capability information, and deletes the roaming PLMN in the EPLMN list when the judgment result is yes, and retains the roaming PLMN in the EPLMN list when the judgment result is no.

8. The method according to claim 7, wherein the sending the EPLMN list to the terminal specifically includes:

judging whether the terminal meets the roaming condition of the core network;

and if so, sending the EPLMN list to the terminal.

9. The method of claim 8, wherein before the determining whether the terminal satisfies the core network roaming condition, the method further comprises:

receiving an attachment request/registration request sent by the terminal, where the attachment request/registration request carries registration information of the terminal, and the registration information includes: the terminal comprises position information of the terminal, and/or an International Mobile Subscriber Identity (IMSI), and/or an International Mobile Equipment Identity (IMEI), and/or an international Mobile Subscriber Integrated Services Digital Network (MSISDN);

10. The method according to claim 7, wherein the sending the EPLMN list to the terminal specifically includes:

11. The method of claim 10, wherein the attach accept message/register accept message further carries capability information of the visited network, and before sending the attach accept message/register accept message carrying the EPLMN list to the terminal, the method further comprises:

12. An apparatus for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, configured to be set in a terminal, the apparatus comprising:

the system comprises a list receiving module, a list sending module and a list sending module, wherein the list receiving module is used for receiving an EPLMN list sent by a home network core network device, and the EPLMN list carries a roaming PLMN of a visited network equivalent to a home public land mobile network PLMN of a home network;

and the second processing module is connected with the deletion judging module and used for keeping the roaming PLMN in the EPLMN list when the judgment result of the deletion judging module is negative.

13. An apparatus for processing an EPLMN list of a peer-to-peer public land mobile network in a core network roaming scenario, the apparatus being configured to a core network device of a home network, the apparatus comprising:

a list sending module, configured to send an EPLMN list to the terminal, where the EPLMN list carries a roaming PLMN of a visited network equivalent to a home public land mobile network PLMN of the home network, so that the terminal determines, according to its own capability information and pre-stored capability information of the visited network, whether to delete the roaming PLMN in the EPLMN list, and when a determination result is yes, deletes the roaming PLMN in the EPLMN list, and when a determination result is no, retains the roaming PLMN in the EPLMN list.

14. Apparatus for processing an EPLMN list for a peer public land mobile network in a core network roaming scenario, comprising a memory having a computer program stored therein and a processor configured to execute the computer program to perform the method for processing an EPLMN list for a peer public land mobile network in a core network roaming scenario according to any of claims 1 to 6 or to perform the method for processing an EPLMN list for a peer public land mobile network in a core network roaming scenario according to any of claims 7 to 11.

15. A computer-readable storage medium, having stored thereon a computer program which, when being executed by a processor, implements the method for processing a peer-to-peer public land mobile network EPLMN list in a core network roaming scenario according to any of claims 1 to 6, or implements the method for processing a peer-to-peer public land mobile network EPLMN list in a core network roaming scenario according to any of claims 7 to 11.