WO2022105711A1

WO2022105711A1 - Ims registration method, terminal device and storage medium

Info

Publication number: WO2022105711A1
Application number: PCT/CN2021/130632
Authority: WO
Inventors: 杨新伟; 李哲; 郭浩平; 童笑; 徐立凡; 姜印清
Original assignee: 华为技术有限公司
Priority date: 2020-11-20
Filing date: 2021-11-15
Publication date: 2022-05-27
Also published as: CN114520804A

Abstract

Embodiments of the present application apply to the technical field of communications, and provide an IMS registration method, a terminal device and a storage medium. The terminal device receives a PDU session rejection message in a 5G network. The PDU session rejection message is used for indicating that IMS registration by the terminal device in the 5G network is rejected, and comprises a rejection cause value. When the terminal device falls back to a 4G network, and it is determined that no retry indication information is acquired and that the rejection cause value is a preset cause value, the IMS is registered in the 4G network. Since the terminal device can immediately initiate the IMS registration after falling back to the 4G network, the IMS registration rate is improved.

Description

IMS registration method, terminal device and storage medium

This application claims the priority of the Chinese patent application with the application number 202011314974.9 and the application name "IMS registration method, terminal equipment and storage medium" filed with the State Intellectual Property Office on November 20, 2020, the entire contents of which are incorporated by reference in in this application.

technical field

The embodiments of the present application relate to the field of communication technologies, and in particular, to an IMS registration method, a terminal device, and a storage medium.

Background technique

With the development of communication technology, the mobile communication system has developed from the second generation mobile communication system (2G) to the fifth generation mobile communication system (5G). Among them, the voice service is a very important service. In 2G or 3G networks, voice services are mainly carried by the circuit switched (CS) domain. In 4G or 5G networks, voice services are mainly carried by the IP multimedia subsystem (IMS) domain. With the popularization of 4G and 5G networks, more and more voice services are carried by the IMS domain. The voice service carried in the IMS domain has a higher-definition call experience than the voice service carried in the CS domain, which is the development direction of the voice service in the future.

When a terminal device initiates an IMS registration in a 5G standalone architecture (SA) network and is rejected by the network, in some scenarios, the terminal device will fall back to the 4G network and start a penalty timer. The terminal device cannot perform IMS registration before the penalty timer expires, resulting in a low IMS registration rate.

SUMMARY OF THE INVENTION

The embodiments of the present application provide an IMS registration method, a terminal device and a storage medium, which improve the IMS registration rate.

A first aspect provides an IMS registration method, comprising: receiving a PDU session rejection message in a 5G network, the PDU session rejection message is used to indicate that a terminal device is rejected when initiating an IMS registration in the 5G network, and the PDU session rejection message includes the rejection Reason value. When the terminal device falls back to the 4G network, and it is determined that the retry indication information is not obtained and the rejection cause value is determined to be a preset cause value, the IMS registration is initiated in the 4G network.

The IMS registration method provided in the first aspect, for a scenario where the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information, when the terminal device falls back to the 4G network, determine the reason for the rejection of the IMS registration failure in the 5G network When the value is the preset cause value and the IMS of the 4G network is available, the IMS registration can be initiated in the 4G network immediately without considering the penalty timer. In this way, the terminal device can initiate IMS registration immediately after falling back to the 4G network, which improves the IMS registration rate, and ensures that the voice service can be carried out in a timely manner in the 4G network, which improves the call quality of the voice service and improves the user's call experience.

In a possible implementation manner, determining that the retry indication information is not obtained includes: determining that the PDU session rejection message does not carry the retry indication information, and the USIM card of the terminal device does not set the retry indication information.

In a possible implementation manner, the preset cause values include: operator definition prohibited, service option not supported, requested service option not subscribed, and missing or unknown DNN in the slice.

In a possible implementation manner, after it is determined that the retry indication information is not obtained and the rejection cause value is a preset cause value, the method further includes: starting a penalty timer, and the penalty timer is used to indicate the duration that the terminal device cannot initiate the IMS registration. .

In this implementation manner, when the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information, the penalty timer can still be started. However, the IMS registration initiated by the terminal device after falling back to the 4G network is not affected by the penalty timer. That is to say, if the terminal device falls back to the 4G network, it is determined that the rejection reason for IMS registration failure in the 5G network is the preset reason value and When the IMS of the 4G network is available, the IMS registration can still be initiated in the 4G network immediately, which improves the IMS registration rate and ensures that the voice service can be carried out in a timely manner in the 4G network.

In a possible implementation manner, starting the penalty timer includes: if the first penalty timer configured by the 5G network is obtained, starting the first penalty timer.

In a possible implementation manner, the method further includes: if the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is configured in the USIM card of the terminal device, starting the second penalty timer.

In a possible implementation manner, it also includes: if the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is not configured in the USIM card of the terminal device, starting the preset third penalty timer .

In a possible implementation manner, after determining that the retry indication information is not obtained and determining that the rejection cause value is a preset cause value, the method further includes: not starting a penalty timer, and the penalty timer is used to indicate that the terminal device cannot initiate the continuation of the IMS registration. time.

In this implementation manner, for a scenario where the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information, the terminal device will not start the penalty timer. By not starting the penalty timer, the IMS registration process in this scenario is simplified, and the execution efficiency is improved.

In a possible implementation manner, the preset cause value is stored in the blacklist.

In this implementation manner, since the blacklist is configurable, the cost and complexity of subsequent maintenance and modification are reduced.

In a second aspect, a terminal device is provided, including: a receiving module configured to receive a PDU session rejection message in a 5G network, where the PDU session rejection message is used to indicate that the terminal device is rejected when IMS registration is initiated in the 5G network, and the PDU session The rejection message includes a rejection reason value; the processing module is used for initiating IMS registration in the 4G network when the terminal device falls back to the 4G network and determines that the retry indication information is not obtained and the rejection reason value is a preset reason value.

In a possible implementation manner, the processing module is specifically configured to: determine that the PDU session rejection message does not carry the retry indication information, and the USIM card of the terminal device does not set the retry indication information.

In a possible implementation manner, the processing module is further configured to: start a penalty timer after determining that the retry indication information is not obtained and that the rejection cause value is a preset cause value, and the penalty timer is used to indicate that the terminal device cannot initiate the IMS. The duration of the registration.

In a possible implementation manner, the processing module is specifically configured to: start the first penalty timer if the first penalty timer configured by the 5G network is obtained.

In a possible implementation manner, the processing module is further configured to: start the second penalty timer if the first penalty timer configured by the 5G network is not obtained and the second penalty timer is configured in the USIM card of the terminal device. .

In a possible implementation manner, the processing module is further configured to: if the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is not configured in the USIM card of the terminal device, start the preset third penalty timer. Punishment timer.

In a possible implementation manner, the processing module is further configured to: after it is determined that the retry indication information is not obtained and the rejection cause value is a preset cause value, the penalty timer is not started, and the penalty timer is used to indicate that the terminal device cannot initiate Duration of IMS registration.

In a third aspect, a terminal device is provided, the terminal device includes a processor, the processor is configured to be coupled to a memory, and read instructions in the memory and cause the terminal device to execute the method provided in the first aspect according to the instructions.

In a fourth aspect, a terminal device is provided, including a processor and a memory, where the processor is configured to call a program stored in the memory to execute the method provided in the first aspect above.

A fifth aspect provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a computer or a processor, the method provided in the first aspect above is implemented.

In a sixth aspect, a program product is provided, the program product includes a computer program, the computer program is stored in a readable storage medium, and at least one processor of a device can read the computer program from the readable storage medium , the at least one processor executes the computer program so that the device implements the method provided in the first aspect above.

Description of drawings

FIG. 1 is an architectural diagram of a communication system to which an embodiment of the application is applicable;

2 is a schematic diagram of an interface when a mobile phone resides in a 5G network;

Fig. 3 is a kind of interface schematic diagram when the mobile phone resides in the 4G network;

Fig. 4 is a kind of flow chart that terminal equipment carries out IMS registration;

Fig. 5 is a kind of interface change schematic diagram of the mobile phone in the process shown in Fig. 4;

6 is a flowchart of an IMS registration method provided by an embodiment of the present application;

Fig. 7 is a kind of interface change schematic diagram of the mobile phone in the process shown in Fig. 6;

FIG. 8 is another flowchart of the IMS registration method provided by the embodiment of the present application;

FIG. 9 is another flowchart of the IMS registration method provided by the embodiment of the present application;

FIG. 10 is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

FIG. 11 is another schematic structural diagram of a terminal device provided by an embodiment of the present application.

Detailed ways

The embodiments of the present application are described below with reference to the accompanying drawings.

The IMS registration method provided in the embodiment of the present application can be applied to a terminal device. Exemplarily, FIG. 1 is an architectural diagram of a communication system to which this embodiment of the present application is applicable. As shown in FIG. 1 , the communication system may include 4G base stations, 5G base stations, core network equipment (not shown) and terminal equipment. Among them, the base station in the 4G network can be called a 4G base station (evolved nodeB, eNB), and the base station in the 5G network can be called a 5G base station (5G nodeB, gNB). As shown in FIG. 1 , the terminal device 1 can communicate with a 4G base station and/or a 5G base station. Specifically, if the terminal device 1 resides in the 4G network, it can perform IMS registration with the core network device through the 4G base station, so as to perform the voice service in the 4G network. If the terminal device 1 resides in the 5G network, it can perform IMS registration with the core network device through the 5G base station, so as to perform voice services in the 5G network.

4G base stations or 5G base stations can be connected to core network equipment wirelessly or wiredly. The core network equipment and the 4G base station or 5G base station can be independent and different physical equipment, or the functions of the core network equipment and the functions of the 4G base station or 5G base station can be integrated on the same physical equipment, or can be integrated on one physical equipment. Some functions of core network equipment and some functions of 4G base stations or 5G base stations are included.

Optionally, the core network equipment of the 4G network and the core network equipment of the 5G network may be the same or different.

A 4G base station or a 5G base station is a device on the network side for transmitting and receiving signals, such as a radio access network (RAN) node that connects a terminal device to a wireless network. The wireless coverage area of a 4G base station or a 5G base station may include one or more cells. A terminal device within the coverage of a cell communicates with a 4G base station or a 5G base station through transmission resources (eg, frequency domain resources, spectrum resources, or time-frequency resources) of the cell. Optionally, in an implementation manner, a 4G base station or a 5G base station may include a centralized unit (centralized unit, CU) node, or a distributed unit (distributed unit, DU) node, or a RAN device including a CU node and a DU node. Optionally, the type of the 4G base station or the 5G base station may include but is not limited to: a macro base station, a micro base station, a home base station (Femeto), or an access point (Access Point, AP). Optionally, the 5G base station in FIG. 1 may be a 5G base station in the 5G SA networking.

A terminal device, also called user equipment (UE), mobile station (MS), or mobile terminal (MT), is a device that provides voice/data connectivity to users. At present, some examples of terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, PDA, mobile internet device (MID), wearable device, virtual reality (VR) device, augmented Augmented reality (AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, smart grid Wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc.

When the terminal device performs IMS registration in the 4G network or in the 5G network, an icon displayed on the desktop of the terminal device can indicate whether the IMS registration is successful. Taking the terminal device as a mobile phone as an example, exemplarily, when the mobile phone performs IMS registration in the 5G network, FIG. 2 is a schematic diagram of an interface when the mobile phone resides in the 5G network. Figures (a) and (b) in Figure 2 are scenarios where the mobile phone successfully registers with the IMS in the 5G network, and (c) in Figure 2 is the scenario where the mobile phone fails to register with the IMS in the 5G network. As shown in (a) of FIG. 2 , the desktop 100 of the mobile phone may include icons of multiple application programs, and further include

icons

111 and 121 . Icon 121 is used to indicate that the mobile phone is currently residing in the 5G network, and icon 111 is used to indicate that the mobile phone has successfully registered with the IMS in the 5G network, the user's voice service is carried by the IMS domain, and the user will have a higher-definition call experience. The difference between (b) in FIG. 2 and (a) in FIG. 2 is that the icons indicating successful IMS registration of the mobile phone are different. Specifically, in (a) of FIG. 2 , the icon 111 is displayed as the letters “HD”, and in (b) of FIG. 2 , the icon 112 is displayed as the letters “VoLTE”. In (c) of FIG. 2, the desktop 100 of the mobile phone only includes the icon 121, indicating that the mobile phone is currently residing in the 5G network, but has not successfully registered with the IMS.

Similarly, when the mobile phone performs IMS registration in the 4G network, FIG. 3 is a schematic diagram of an interface when the mobile phone resides in the 4G network. The picture (a) in FIG. 3 is a scene in which the mobile phone successfully registers with the IMS in the 4G network, and the picture (b) in FIG. 3 is the scene in which the mobile phone fails to register with the IMS in the 4G network. The difference between (a) in FIG. 3 and (a) in FIG. 2 is that the icons indicating that the mobile phone resides on the network are different, and the same is that the icons indicating the successful IMS registration of the mobile phone are the same. Specifically, in (a) of FIG. 3, the icon 122 is displayed as the letters "4G", indicating that the mobile phone resides in the 4G network, and in (a) of FIG. 2, the icon 121 is displayed as the letters "5G" , indicating that the phone resides on the 5G network. Among them, the icons 111 are the same, and both are displayed as letters "HD".

It should be noted that FIG. 2 and FIG. 3 are only examples, and do not limit the icon indicating that the terminal device resides on the network and the icon indicating whether the IMS registration of the terminal device is successful.

When the terminal device initiates IMS registration in the 5GSA network and is rejected by the network side, in some scenarios, the terminal device will fall back to the 4G network and start a penalty timer. The process will be described below with reference to FIG. 4 .

As shown in Figure 4, the terminal device currently resides on the 5G network, and the IMS registration method may include:

S401. The terminal device receives the PDU session rejection message sent by the 5G base station.

Wherein, the packet data unit (packet data unit, PDU) session rejection message is used to indicate that the terminal device is rejected when initiating IMS registration in the 5G network, and the PDU session rejection message includes a rejection reason value. The rejection reason value can be found in Section 6.4.1.4.3 of the 3rd Generation Partnership Project (3GPP) protocol 24501. For example, see Table 1 for some rejection reason values.

Table 1

S402. The terminal device determines whether retry indication information is acquired.

The retry indication information (also referred to as re-attempt) is used to instruct the terminal device to perform operations after the IMS registration fails in the 5G network.

Optionally, the PDU session rejection message may include retry indication information, and/or the global subscriber identity module (universal subscriber identity module, USIM) card of the terminal device may be configured with retry indication information.

Optionally, acquiring the retry indication information may include: acquiring the retry indication information in the PDU session rejection message, or acquiring the retry indication information in the USIM card.

Optionally, if the PDU session rejection message includes the first retry indication information, and the USIM card includes the second retry indication information, the first retry indication information is determined as the retry indication information obtained by the terminal device.

Optionally, the retry indication information is not acquired, which may include: the PDU session rejection message does not include the retry indication information, and the USIM card does not include the retry indication information.

If the terminal device obtains the retry indication information, S406 is performed, and subsequent operations are performed according to the retry indication information.

If the terminal device does not acquire the retry indication information, S403 is performed.

S403. The terminal device determines whether the rejection cause value in the PDU session rejection message is #8, #32, #33 or #70.

If the terminal device determines that the rejection reason value in the PDU session rejection message is not #8, #32, #33 or #70 (see Table 1), it will perform S407, and perform subsequent operations according to the relevant provisions in the communication protocol.

If the terminal device determines that the rejection reason value in the PDU session rejection message is #8, #32, #33 or #70, S404 is executed.

S404. The terminal device determines whether a penalty timer is configured on the network side.

The penalty timer configured on the network side is used to indicate the duration that the terminal device cannot initiate IMS registration. This application does not limit the specific duration of the penalty timer configured on the network side.

If the terminal device determines that a penalty timer is configured on the network side, S408 is executed to start the penalty timer configured on the network side. Before the penalty timer expires, the terminal device cannot initiate IMS registration.

If the terminal device determines that the penalty timer is not configured on the network side, S405 is executed.

S405. The terminal device determines whether a penalty timer is configured in the USIM card.

The penalty timer configured in the USIM card is used to indicate the duration that the terminal device cannot initiate IMS registration. This application does not limit the specific duration of the penalty timer configured in the USIM card.

If the terminal device determines that the penalty timer is configured in the USIM card, S409 is executed to start the penalty timer configured in the USIM card. Before the penalty timer expires, the terminal device cannot initiate IMS registration.

If the terminal device determines that the penalty timer is not configured in the USIM card, S410 is executed to start the preset penalty timer. The preset penalty timer is used to indicate the duration that the terminal device cannot initiate IMS registration. This application does not limit the specific duration of the preset penalty timer, for example, 12 minutes.

S406. Perform subsequent operations according to the retry indication information.

S407. Perform subsequent operations according to the communication protocol.

S408. Start the penalty timer configured on the network side.

S409. Start the penalty timer configured in the USIM card.

S410. Start a preset penalty timer.

It should be noted that when the terminal device fails to register with the IMS in the 5G network, it can fall back to the 4G network. The flowchart shown in FIG. 4 does not show the steps for the terminal device to fall back to the 4G network. In practical application, the step of returning the terminal device to the 4G network may be performed after S401.

Optionally, this application does not limit the implementation manner of the terminal device falling back to the 4G network, which can be an existing process, for example, implemented through a tracking area update (tracking area update, TAU) process.

It can be seen that for the scenario where the terminal device fails to register with the IMS in the 5G network and does not obtain the retry indication information, the terminal device will start the penalty timer. The penalty timer may be one of the penalty timer configured on the network side shown in the dotted box in FIG. 4 , the penalty timer configured in the USIM card, and the preset penalty timer. The terminal device cannot initiate IMS registration before the penalty timer expires. Usually, the IMS access point name (APN) does not change depending on whether the access technology is 4G or 5G, which leads to the penalty timer still running and taking effect after the terminal device falls back to the 4G network, even if the 4G wireless access technology When the IMS is available, the terminal device still cannot initiate IMS registration in the 4G network, and can initiate IMS registration in the 4G network only after the penalty timer expires. This results in lower IMS registration rates. In addition, the terminal device cannot initiate a voice service on the 4G network before the penalty timer expires. If a voice service is initiated, it will fall back to the CS domain of the 2G network or 3G network, affecting the user's voice service, reducing the voice call quality, and reducing the user's The calling experience is poor. Moreover, if the 2G network or 3G network in the area where the user is located is unavailable, the terminal device cannot perform the voice service, which affects the basic functions of the voice service.

FIG. 5 is a schematic diagram of an interface change of the mobile phone in the process shown in FIG. 4 . As shown in (a) of FIG. 5, the desktop 100 of the mobile phone may include an icon 121, indicating that the mobile phone is currently residing in the 5G network, but there is no

icon

111 or 112 in FIG. 2, indicating that the mobile phone is registered in the 5G network IMS fail. After that, the mobile phone falls back to the 4G network. As shown in (b) of FIG. 5 , the desktop 100 of the mobile phone may include an icon 122 to indicate that the mobile phone is currently residing in the 4G network, but there is no icon 111 in FIG. The mobile phone did not successfully register with the IMS in the 4G network.

The IMS registration method provided in the embodiment of the present application can be applied to a scenario where the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information. When the terminal device falls back to the 4G network and determines that the rejection reason value for IMS registration failure in the 5G network is the preset reason value and the IMS of the 4G network is available, it can immediately initiate the IMS registration in the 4G network without considering the penalty timer. duration. Since the terminal equipment can immediately initiate IMS registration after falling back to the 4G network, the IMS registration rate is improved, and it is ensured that the voice service can be carried out in a timely manner in the 4G network, which improves the call quality of the voice service and improves the user's call experience.

The technical solutions of the present application will be described in detail below through specific embodiments. The following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

The embodiments of the present application may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The terms "first", "second", "third", "fourth", etc. (if any) in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. .

FIG. 6 is a flowchart of an IMS registration method provided by an embodiment of the present application. In the IMS registration method provided by this embodiment, the execution subject may be a terminal device. As shown in FIG. 6 , the IMS registration method provided in this embodiment may include:

S601. Receive a PDU session rejection message in the 5G network.

The PDU session rejection message is used to indicate that the terminal device is rejected when initiating IMS registration in the 5G network, and the PDU session rejection message includes a rejection reason value.

Wherein, for the PDU session rejection message, reference may be made to the relevant description in S401 in FIG. 4 above, and the principles are similar, which will not be repeated here.

S602. When the terminal device falls back to the 4G network, and it is determined that the retry indication information is not obtained and the rejection cause value is determined to be a preset cause value, initiate IMS registration in the 4G network.

For the retry indication information, reference may be made to the relevant description in S402 in FIG. 4 above, and the principles are similar, and details are not repeated here.

The specific content of the preset cause value is not limited in this embodiment. Optionally, see Table 1, the preset cause values may include but are not limited to: operator-defined prohibition (#8 reason value), service option not supported (#32 cause value), requested service option not subscribed (# Reason value #33) and missing or unknown DNNs in the slice (reason value #70).

Optionally, the preset reason value can be stored in the blacklist. This embodiment does not limit the storage location and storage manner of the blacklist. For example, the blacklist can be a table. By storing the preset cause value in the blacklist, in the process of adding, deleting or modifying the preset cause value, the blacklist can be operated. Since the blacklist can be configured, the cost and cost of subsequent maintenance and modification are reduced. the complexity.

It can be seen that, in the IMS registration method provided in this embodiment, for the scenario where the terminal device fails to register with the IMS in the 5G network and does not obtain the retry indication information, when the terminal device falls back to the 4G network, it is determined that the IMS registration fails in the 5G network. When the rejection reason value is the preset reason value and the IMS of the 4G network is available, the IMS registration can be initiated in the 4G network immediately, without considering the penalty timer. In this way, the terminal device can initiate IMS registration immediately after it falls back to the 4G network, which improves the IMS registration rate, and ensures that the voice service can be carried out in a timely manner in the 4G network, which improves the call quality of the voice service and improves the user's call experience. .

FIG. 7 is a schematic diagram of an interface change of the mobile phone in the process shown in FIG. 6 . As shown in (a) of FIG. 7 , the desktop 100 of the mobile phone may include an icon 121, indicating that the mobile phone is currently residing in the 5G network, but there is no

icon

111 or 112 in FIG. 2, indicating that the mobile phone is registered in the 5G network IMS fail. After that, the mobile phone falls back to the 4G network. As shown in (b) of FIG. 7 , the desktop 100 of the mobile phone may include an icon 111 and an icon 122 . Icon 122 indicates that the mobile phone is currently residing on the 4G network, and icon 111 indicates that the mobile phone has successfully registered with the IMS in the 4G network, the user's voice service can be carried by the IMS domain in time, and the user will have a higher-definition call experience.

Optionally, in S602, it is determined that no retry indication information is obtained, which may include:

It is determined that the PDU session rejection message does not carry retry indication information, and the global subscriber identity card USIM card of the terminal device does not have retry indication information set.

For details, refer to the relevant description in S402 in FIG. 4 , the principles are similar, and details are not repeated here.

Optionally, in an implementation manner, after it is determined in S602 that the retry indication information is not obtained and the rejection cause value is determined to be a preset cause value, the IMS registration method provided by this embodiment may further include:

The penalty timer is started, and the penalty timer is used to indicate the duration that the terminal device cannot initiate IMS registration.

In this implementation manner, when the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information, the penalty timer can still be started. However, the IMS registration initiated by the terminal device after falling back to the 4G network is not affected by the penalty timer. That is to say, if the terminal device falls back to the 4G network, it is determined that the rejection reason for IMS registration failure in the 5G network is the preset reason value and When the IMS of the 4G network is available, the IMS registration can still be initiated in the 4G network immediately, which improves the IMS registration rate and ensures that the voice service can be performed in a timely manner in the 4G network. Moreover, since the process of starting the penalty timer is consistent with the existing process, the modification of the existing process is avoided, which is easy to implement.

The execution sequence between the terminal device starting the penalty timer and the terminal device falling back to the 4G network is not limited in this embodiment.

Optionally, the penalty timer may include any one of the following: a penalty timer configured on the network side, a penalty timer configured in the USIM card, and a preset penalty timer.

Optionally, start a penalty timer, which may include:

If the first penalty timer configured by the 5G network is obtained, the first penalty timer is started.

If the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is configured in the USIM card of the terminal device, the second penalty timer is started.

If the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is not configured in the USIM card of the terminal device, the preset third penalty timer is started.

For details, please refer to the related descriptions in S404-S405 and S408-S410 in FIG. 4 , the principles are similar, and details are not repeated here.

Optionally, in another implementation manner, after it is determined in S602 that the retry indication information is not obtained and the rejection cause value is determined to be a preset cause value, the IMS registration method provided by this embodiment may further include:

The penalty timer is not started, and the penalty timer is used to indicate the duration that the terminal device cannot initiate IMS registration.

Optionally, FIG. 8 is another flowchart of the IMS registration method provided by the embodiment of the present application. In another embodiment of the present application, based on the embodiment shown in FIG. 6 , a specific implementation manner of the IMS registration method is provided. In this embodiment, when the terminal device fails to register with the IMS in the 5G network and does not obtain the retry indication information, a penalty timer may be started.

As shown in FIG. 8 , the IMS registration method provided in this embodiment may include:

For details of S401 to S410, reference may be made to the relevant description in FIG. 4, the principles are similar, and details are not repeated here.

S801, the terminal device initiates IMS registration in the 4G network.

It should be noted that when the terminal device fails to register with the IMS in the 5G network, it can fall back to the 4G network. The flowchart shown in FIG. 8 does not show the steps for the terminal device to fall back to the 4G network. In practical application, the step of returning the terminal device to the 4G network may be performed after S401.

In the IMS registration method provided in this embodiment, when the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information, a penalty timer can be started. When the terminal device falls back to the 4G network, and it is determined that the rejection reason value of the IMS registration failure in the 5G network is the preset reason value and the IMS of the 4G network is available, it can immediately initiate the IMS registration in the 4G network, and the penalty timer is actually invalid. . In this way, the terminal device can initiate IMS registration immediately after it falls back to the 4G network, which improves the IMS registration rate, and ensures that the voice service can be carried out in a timely manner in the 4G network, which improves the call quality of the voice service and improves the user's call experience. .

Optionally, FIG. 9 is another flowchart of the IMS registration method provided by the embodiment of the present application. In yet another embodiment of the present application, on the basis of the embodiment shown in FIG. 6 , another specific implementation manner of the IMS registration method is provided. In this embodiment, when the terminal device fails to register with the IMS in the 5G network and does not obtain retry indication information, the penalty timer is not started. The preset reason value may be stored in the blacklist.

As shown in FIG. 9 , the IMS registration method provided by this embodiment may include:

If the terminal device does not acquire the retry indication information, S901 is performed.

S901. The terminal device judges whether the rejection reason value in the PDU session rejection message is the reason value in the blacklist.

If the terminal device determines that the rejection reason value in the PDU session rejection message is not the reason value in the blacklist, S407 is performed, and subsequent operations are performed according to the relevant provisions in the communication protocol.

If the terminal device determines that the rejection reason value in the PDU session rejection message is the reason value in the blacklist, S902 is executed.

S902, the terminal device does not start the penalty timer, and initiates IMS registration in the 4G network.

S407. Perform subsequent operations according to the communication protocol.

Among them, S401 , S402 , S406 and S407 may refer to the description of the relevant steps in FIG. 4 for details, and the principles are similar, and will not be repeated here.

It should be noted that when the terminal device fails to register with the IMS in the 5G network, it can fall back to the 4G network. The flowchart shown in FIG. 9 does not show the steps for the terminal device to fall back to the 4G network. In practical application, the step of returning the terminal device to the 4G network may be performed after S401.

In the IMS registration method provided in this embodiment, the terminal device does not start the penalty timer when the IMS registration fails in the 5G network and the retry indication information is not obtained. When the terminal device falls back to the 4G network, and it is determined that the rejection reason value of the IMS registration failure in the 5G network is the preset reason value and the IMS of the 4G network is available, the IMS registration can be immediately initiated in the 4G network, which improves the IMS registration rate, and , which ensures that the voice service can be carried out in a timely manner in the 4G network, improves the call quality of the voice service, and improves the user's call experience.

FIG. 10 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. As shown in FIG. 10 , the terminal device provided in this embodiment may include:

The receiving module 1001 is configured to receive a PDU session rejection message in a 5G network. The PDU Session Reject message is used to indicate that the terminal device is rejected when initiating IMS registration in the 5G network, and the PDU Session Reject message includes a rejection reason value.

The processing module 1002 is configured to initiate IMS registration in the 4G network when the terminal device falls back to the 4G network and determines that the retry indication information has not been obtained and that the rejection cause value is a preset cause value.

Optionally, the processing module 1002 is specifically used for:

It is determined that the PDU session rejection message does not carry retry indication information, and no retry indication information is set in the USIM card of the terminal device.

Optionally, the preset reason values include: operator-defined prohibition, service option not supported, requested service option not subscribed, and missing or unknown DNN in the slice.

Optionally, the processing module 1002 is further configured to:

After it is determined that the retry indication information is not acquired and the rejection cause value is determined to be a preset cause value, a penalty timer is started, and the penalty timer is used to indicate the duration that the terminal device cannot initiate IMS registration.

Optionally, the processing module 1002 is specifically used for:

Optionally, the processing module 1002 is further configured to:

After it is determined that the retry indication information is not acquired and the rejection cause value is the preset cause value, the penalty timer is not started, and the penalty timer is used to indicate the duration that the terminal device cannot initiate the IMS registration.

Optionally, the preset reason value is stored in the blacklist.

The terminal device provided in this embodiment can execute the IMS registration method provided by the method embodiment of this application, and the technical principle and technical effect are similar, and details are not described herein again.

It can be understood that, in order to realize the above-mentioned functions, the terminal device includes corresponding hardware and/or software modules for executing each function. The present application can be implemented in hardware or in the form of a combination of hardware and computer software in conjunction with the algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functionality for each particular application in conjunction with the embodiments, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the terminal device may be divided into functional modules according to the foregoing method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation. It should be noted that the names of the modules in the embodiments of the present application are schematic, and the names of the modules are not limited in actual implementation.

Please refer to FIG. 11 , which shows another structure of a terminal device provided by an embodiment of the present application. The terminal device includes: a processor 1101 , a receiver 1102 , a transmitter 1103 , a memory 1104 , and a bus 1105 . The processor 1101 includes one or more processing cores, and the processor 1101 executes various functional applications and information processing by running software programs and modules. The receiver 1102 and the transmitter 1103 may be implemented as a communication component, which may be a baseband chip. The memory 1104 is connected to the processor 1101 through the bus 1105 . The memory 1104 may be configured to store at least one program instruction, and the processor 1101 may be configured to execute the at least one program instruction, so as to implement the technical solutions of the foregoing embodiments. The implementation principle and technical effect thereof are similar to the related embodiments of the above method, and are not repeated here.

When the terminal is powered on, the processor can read the software program in the memory, interpret and execute the instructions of the software program, and process the data of the software program. When it is necessary to send data through the antenna, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the control circuit in the control circuit. The control circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. send. When data is sent to the terminal, the control circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for the convenience of description, FIG. 11 only shows one memory and a processor. In an actual terminal, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

As an optional implementation manner, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication data, and the central processing unit is mainly used to execute software programs and process data of the software programs. Those skilled in the art can understand that the baseband processor and the central processing unit may be integrated into one processor, or may be independent processors, which are interconnected through technologies such as a bus. Those skilled in the art can understand that a terminal may include multiple baseband processors to adapt to different network standards, a terminal may include multiple central processors to enhance its processing capability, and various components of the terminal may be connected through various buses. The baseband processor can also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data may be built in the processor, or may be stored in the memory in the form of a software program, and the processor executes the software program to realize the baseband processing function. The memory can be integrated in the processor or independent of the processor. The memory includes a cache, which can store frequently accessed data/instructions.

In this embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or The methods, steps and logic block diagrams disclosed in the embodiments of this application are executed. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SS), etc., or may also be a volatile memory (volatile memory), for example Random-access memory (RAM). Memory is, without limitation, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data. The methods provided by the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, network equipment, user equipment, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line, DSL), or wireless (eg, infrared, wireless, microwave, etc.) A readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The available media can be magnetic media (eg, floppy disks, hard disks, magnetic tapes) ), optical media (eg, digital video disc (DWD), or semiconductor media (eg, SSD), etc.).

The embodiments of the present application provide a computer program product, which enables the terminal to execute the technical solutions in the foregoing embodiments when the computer program product runs on a terminal. The implementation principle and technical effect thereof are similar to those of the above-mentioned related embodiments, which will not be repeated here.

The embodiments of the present application provide a computer-readable storage medium, on which program instructions are stored, and when the program instructions are executed by a terminal, the terminal executes the technical solutions of the foregoing embodiments. The implementation principle and technical effect thereof are similar to those of the above-mentioned related embodiments, which will not be repeated here. To sum up, the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

An IMS registration method, comprising:

Receive a packet data unit PDU session rejection message in the 5G network; the PDU session rejection message is used to indicate that the terminal device is rejected when initiating the IP Multimedia Subsystem IMS registration in the 5G network, and the PDU session rejection message includes the rejection reason value;

When the terminal device falls back to the 4G network, and it is determined that the retry indication information is not obtained and that the rejection cause value is a preset cause value, the IMS registration is initiated in the 4G network.
The method according to claim 1, wherein the determining that retry indication information is not obtained comprises:

It is determined that the PDU session rejection message does not carry the retry indication information, and the retry indication information is not set in the global subscriber identity card USIM card of the terminal device.
The method according to claim 1, wherein the preset reason value comprises: operator definition prohibited, service option not supported, requested service option not subscribed, and missing or unknown data network name DNN in slice.
The method according to any one of claims 1 to 3, wherein after determining that retry indication information is not obtained and determining that the rejection cause value is a preset cause value, the method further comprises:

A penalty timer is started, and the penalty timer is used to indicate the duration for which the terminal device cannot initiate IMS registration.
The method according to claim 4, wherein the starting the penalty timer comprises:

If the first penalty timer configured by the 5G network is obtained, the first penalty timer is started.
The method according to claim 5, wherein the method further comprises:

If the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is configured in the USIM card of the terminal device, the second penalty timer is started.
The method according to claim 5 or 6, wherein the method further comprises:

If the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is not configured in the USIM card of the terminal device, a preset third penalty timer is started.
The method according to any one of claims 1 to 3, wherein after determining that retry indication information is not obtained and determining that the rejection cause value is a preset cause value, the method further comprises:

A penalty timer is not started, and the penalty timer is used to indicate the duration for which the terminal device cannot initiate IMS registration.
The method according to any one of claims 1 to 3, wherein the preset cause value is stored in a blacklist.
A terminal device, characterized in that it includes:

a receiving module, configured to receive a packet data unit PDU session rejection message in the 5G network; the PDU session rejection message is used to indicate that the terminal device is rejected when initiating the IP Multimedia Subsystem IMS registration in the 5G network, the The PDU Session Reject message includes the Reject Reason value;

The processing module is configured to initiate IMS registration in the 4G network when the terminal device falls back to the 4G network and determines that the retry indication information is not obtained and that the rejection cause value is a preset cause value.
The terminal device according to claim 10, wherein the processing module is specifically configured to:

It is determined that the PDU session rejection message does not carry the retry indication information, and the retry indication information is not set in the global subscriber identity card USIM card of the terminal device.
The terminal device according to claim 10, wherein the preset reason value comprises: operator defined prohibition, service option not supported, requested service option not subscribed, and missing or unknown data network name DNN in the slice.
The terminal device according to any one of claims 10 to 12, wherein the processing module is further configured to:

After it is determined that the retry indication information is not acquired and the rejection cause value is determined to be a preset cause value, a penalty timer is started, and the penalty timer is used to indicate the duration that the terminal device cannot initiate IMS registration.
The terminal device according to claim 13, wherein the processing module is specifically configured to:

If the first penalty timer configured by the 5G network is obtained, the first penalty timer is started.
The terminal device according to claim 14, wherein the processing module is further configured to:

If the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is configured in the USIM card of the terminal device, the second penalty timer is started.
The terminal device according to claim 14 or 15, wherein the processing module is further configured to:

If the first penalty timer configured by the 5G network is not obtained, and the second penalty timer is not configured in the USIM card of the terminal device, a preset third penalty timer is started.
The terminal device according to any one of claims 10 to 12, wherein the processing module is further configured to:

After it is determined that the retry indication information is not acquired and the rejection cause value is determined to be a preset cause value, a penalty timer is not started, and the penalty timer is used to indicate the duration that the terminal device cannot initiate IMS registration.
The terminal device according to any one of claims 10 to 12, wherein the preset cause value is stored in a blacklist.
A terminal device is characterized by comprising a processor and a memory, wherein the processor is configured to call a program stored in the memory to execute the method according to any one of claims 1 to 9.
A computer-readable storage medium, characterized in that, the computer-readable storage medium stores computer instructions, when the computer instructions are executed on a terminal device, the terminal device is made to perform any one of claims 1 to 9. one of the methods described.