CN114520804A

CN114520804A - IMS registration method, terminal device and storage medium

Info

Publication number: CN114520804A
Application number: CN202011314974.9A
Authority: CN
Inventors: 杨新伟; 李哲; 郭浩平; 童笑; 徐立凡; 姜印清
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2022-05-20
Also published as: WO2022105711A1

Abstract

The embodiment of the application is applicable to the technical field of communication, and provides an IMS registration method, terminal equipment and a storage medium. The terminal equipment receives a PDU session rejection message in the 5G network, the PDU session rejection message is used for indicating that the terminal equipment is rejected when registering the IMS in the 5G network, the PDU session rejection message comprises a rejection reason value, when the terminal equipment falls back to the 4G network, and the terminal equipment does not acquire retry indication information and determines that the rejection reason value is a preset reason value, the IMS is registered in the 4G network. The IMS registration can be initiated immediately after the terminal equipment falls back to the 4G network, so that the IMS registration rate is improved.

Description

IMS registration method, terminal device and storage medium

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to an IMS registration method, terminal equipment and a storage medium.

Background

With the development of communication technology, mobile communication systems have evolved from second-generation mobile communication systems (2G) to fifth-generation mobile communication systems (5G). Among them, voice service is a very important service. In 2G or 3G networks, voice traffic is carried mainly by the Circuit Switched (CS) domain, and in 4G or 5G networks, voice traffic is carried mainly by the IP Multimedia Subsystem (IMS) domain. With the popularity of 4G and 5G networks, voice traffic is increasingly being carried by the IMS domain. The voice service carried by the IMS domain has a clearer conversation experience compared with the voice service carried by the CS domain, and is a development direction of the future voice service.

When a terminal device initiates IMS registration in a 5G independent networking (SA) network, which is rejected by the network, the terminal device may fall back to the 4G network and start a penalty timer in some scenarios. The terminal equipment cannot register the IMS before the penalty timer is overtime, so that the IMS registration rate is low.

Disclosure of Invention

The embodiment of the application provides an IMS registration method, terminal equipment and a storage medium, and improves the IMS registration rate.

In a first aspect, an IMS registration method is provided, including: receiving a PDU session reject message in the 5G network, the PDU session reject message indicating that the terminal device is rejected when initiating IMS registration in the 5G network, the PDU session reject message including a reject cause value. And when the terminal equipment falls back to the 4G network and determines that the retry indication information is not acquired and the reject reason value is the preset reason value, initiating IMS registration in the 4G network.

In the IMS registration method provided in the first aspect, for a scenario where the terminal device fails to perform IMS registration in the 5G network and does not acquire retry indication information, when the terminal device falls back to the 4G network, and it is determined that the reject cause value of the IMS registration failure in the 5G network is the preset cause value and the IMS of the 4G network is available, the IMS registration may be immediately initiated in the 4G network, without considering a penalty timer. Therefore, the terminal equipment can immediately initiate IMS registration after falling back to the 4G network, the IMS registration rate is improved, the voice service can be ensured to be timely carried out in the 4G network, the call quality of the voice service is improved, and the call experience of a user is improved.

In one possible implementation, the determining that no retry indication information is obtained includes: and determining that the PDU session rejection message does not carry retry indication information and no retry indication information is set in a USIM card of the terminal equipment.

In one possible implementation, the preset cause value includes: the operator defines forbidden, service option not supported, requested service option not subscribed and missing or unknown DNNs in the slice.

In a possible implementation manner, after determining that the retry indication information is not acquired and determining that the reject reason value is the preset reason value, the method further includes: and starting a penalty timer, wherein the penalty timer is used for indicating the duration of the time that the terminal equipment can not initiate the IMS registration.

In this implementation, the terminal device may still start the penalty timer when the IMS registration fails in the 5G network and the retry indication information is not obtained. However, the terminal device initiates the IMS registration after falling back to the 4G network without being affected by the penalty timer, that is, when the terminal device falls back to the 4G network and determines that the reject cause value of the IMS registration failure in the 5G network is the preset cause value and the IMS of the 4G network is available, the IMS registration can still be immediately initiated in the 4G network, so that the IMS registration rate is improved, and the voice service can be ensured to be performed in the 4G network in time.

In one possible implementation, starting a penalty timer includes: and 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: and if the first penalty timer configured by the 5G network is not acquired and the second penalty timer is configured in the USIM card of the terminal equipment, starting the second penalty timer.

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

In a possible implementation manner, after determining that the retry indication information is not acquired and determining that the reject reason value is the preset reason value, the method further includes: and not starting a penalty timer, wherein the penalty timer is used for indicating the duration of the time that the terminal equipment cannot initiate the IMS registration.

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

In one possible implementation, the predetermined cause value is stored in a black list.

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

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

In a possible implementation manner, the processing module is specifically configured to: and determining that the PDU session rejection message does not carry retry indication information and no retry indication information is set in a USIM card of the terminal equipment.

In one possible implementation, the preset cause value includes: the operator defines forbidden, service option unsupported, requested service option unsubscribed, and missing or unknown DNNs in slices.

In a possible implementation manner, the processing module is further configured to: and after determining that the retry indication information is not acquired and determining that the rejection reason value is the preset reason value, starting a penalty timer, wherein the penalty timer is used for indicating the duration of the terminal equipment which cannot initiate the IMS registration.

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

In one possible implementation, the processing module is further configured to: and if the first penalty timer configured by the 5G network is not acquired and the second penalty timer is configured in the USIM card of the terminal equipment, starting the second penalty timer.

In one possible implementation, the processing module is further configured to: and if the first penalty timer configured by the 5G network is not acquired and the second penalty timer is not configured in the USIM card of the terminal equipment, starting a preset third penalty timer.

In a possible implementation manner, the processing module is further configured to: and after determining that the retry indication information is not acquired and that the rejection reason value is the preset reason value, not starting a penalty timer, wherein the penalty timer is used for indicating the duration that the terminal equipment cannot initiate the IMS registration.

In a third aspect, a terminal device is provided, where the terminal device includes a processor, and the processor is configured to couple with a memory, read an instruction in the memory, and cause the terminal device to execute the method provided in the first aspect according to the instruction.

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

In a fifth aspect, a computer-readable storage medium is provided, in which instructions are stored, which when executed on a computer or processor, implement the method provided in the above first aspect.

In a sixth aspect, a program product is provided, the program product comprising a computer program stored in a readable storage medium, the computer program being readable from the readable storage medium by at least one processor of an apparatus, the at least one processor executing the computer program to cause the apparatus to carry out the method provided by the first aspect above.

Drawings

Fig. 1 is an architecture diagram of a communication system to which embodiments of the present application are applicable;

FIG. 2 is a schematic diagram of an interface of a mobile phone residing in a 5G network;

FIG. 3 is a schematic diagram of an interface of a mobile phone residing in a 4G network;

fig. 4 is a flowchart of IMS registration performed by a terminal device;

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

fig. 6 is a flowchart of an IMS registration method according to an embodiment of the present application;

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

fig. 8 is another flowchart of an IMS registration method according to an embodiment of the present application;

fig. 9 is a flowchart of an IMS registration method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 11 is another schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the drawings.

The IMS registration method provided by the embodiment of the application can be applied to terminal equipment. Fig. 1 is an architecture diagram of a communication system to which an embodiment of the present application is applicable. As shown in fig. 1, the communication system may include a 4G base station, a 5G base station, a core network device (not shown), and a terminal device. Herein, a base station in the 4G network may be referred to as a 4G base station (eNB), and a base station in the 5G network may be referred to as 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, IMS registration may be performed with the core network device through the 4G base station, so that a voice service is performed in the 4G network. If the terminal device 1 resides in the 5G network, IMS registration may be performed with the core network device through the 5G base station, so that a voice service is performed in the 5G network.

The 4G base station or the 5G base station may be connected to the core network device in a wireless or wired manner. The core network device and the 4G base station or the 5G base station may be separate physical devices, or the function of the core network device and the function of the 4G base station or the 5G base station may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the 4G base station or the 5G base station.

Optionally, the core network device of the 4G network may be the same as or different from the core network device of the 5G network.

A 4G base station or a 5G base station is a device in the network side for transmitting and receiving signals, such as a Radio Access Network (RAN) node that accesses 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. Terminal devices within the coverage of a cell communicate with a 4G base station or a 5G base station via transmission resources (e.g., frequency domain resources, spectrum resources, or time-frequency resources) of the cell. Optionally, in an implementation manner, the 4G base station or the 5G base station may include a Centralized Unit (CU) node, or a Distributed Unit (DU) node, or a RAN device including a CU node and a DU node. Optionally, the types of the 4G base station or the 5G base station may include but are not limited to: a macro base station, a micro base station, a home base station (Femeto), or an Access Point (AP). Alternatively, the 5G base station in fig. 1 may be a 5G base station in a 5G SA networking.

A terminal device, also called a User Equipment (UE), a Mobile Station (MS), or a Mobile Terminal (MT), is a device that provides voice/data connectivity to a user. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (smart security), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like.

When the terminal device performs IMS registration in the 4G network or in the 5G network, an icon displayed in the desktop of the terminal device may indicate whether the IMS registration is successful. Taking a terminal device as a mobile phone as an example, when the mobile phone performs IMS registration in a 5G network, fig. 2 is an interface schematic diagram when the mobile phone resides in the 5G network. Fig. 2 (a) and (b) illustrate a scenario in which IMS registration of a mobile phone in a 5G network is successful, and fig. 2 (c) illustrates a scenario in which IMS registration of a mobile phone in a 5G network is failed. As shown in fig. 2 (a), the desktop 100 of the mobile phone may include icons of a plurality of applications, and further includes an icon 111 and an icon 121. The icon 121 is used to indicate that the mobile phone currently resides in the 5G network, the icon 111 is used to indicate that IMS registration of the mobile phone in the 5G network is successful, the voice service of the user is carried by the IMS domain, and the user will have higher-definition call experience. The difference between the diagram (b) in fig. 2 and the diagram (a) in fig. 2 is that: the icons indicating successful IMS registration of the mobile phone are different. Specifically, in fig. 2 (a), the icon 111 is displayed as the letter "HD", and in fig. 2 (b), the icon 112 is displayed as the letter "VoLTE". In fig. 2 (c), only icon 121 is included in desktop 100 of the handset, indicating that the handset is currently resident 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 interface diagram of the mobile phone residing in the 4G network. Fig. 3 (a) is a scenario in which IMS registration of the mobile phone in the 4G network is successful, and fig. 3 (b) is a scenario in which IMS registration of the mobile phone in the 4G network is failed. The diagram (a) in fig. 3 is different from the diagram (a) in fig. 2 in the icon indicating that the handset is camping on the network, and the same in the icon indicating that the IMS registration of the handset is successful. Specifically, in fig. 3 (a), icon 122 is shown with the letter "4G" indicating that the handset resides in a 4G network, and in fig. 2 (a), icon 121 is shown with the letter "5G" indicating that the handset resides in a 5G network. Wherein the icons 111 are identical and are all displayed as letters "HD".

It should be noted that fig. 2 and 3 are only examples, and form no limitation on the icon indicating that the terminal device resides in the network and the icon indicating whether 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 may fall back to the 4G network and start a penalty timer. This process is described below in conjunction with fig. 4.

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

s401, the terminal equipment receives PDU conversation rejection information sent by the 5G base station.

Wherein, a Packet Data Unit (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 reject cause value. The reject cause value can be found in section 6.4.1.4.3 of third generation partnership project (3 GPP) protocol 24583. For example, some rejection cause values can be found in table 1.

TABLE 1

S402, the terminal equipment judges whether retry indication information is acquired.

Wherein, the retry indication information (also called re-attempt) is used for indicating the operation of the terminal device after the IMS registration fails in the 5G network.

Optionally, the PDU session reject message may include retry indication information, and/or a Universal Subscriber Identity Module (USIM) card of the terminal device may be configured with the retry indication information.

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

Optionally, if the PDU session reject message includes the first retry indication information, and the USIM card includes the second retry indication information, the first retry indication information is determined to be the retry indication information acquired by the terminal device.

Optionally, the obtaining of the retry indication information may include: the PDU session reject message does not include retry indication information, and the USIM card does not include retry indication information.

And if the terminal device acquires the retry indication information, executing S406, and executing subsequent operation according to the retry indication information.

If the terminal device does not acquire the retry instruction information, S403 is executed.

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

If the terminal device determines that the rejection cause value in the PDU session reject message is not #8, #32, #33, or #70 (see table 1), S407 is performed, and the subsequent operation is performed according to the relevant specification in the communication protocol.

If the terminal apparatus judges that the rejection cause value in the PDU session reject message is #8, #32, #33, or #70, S404 is performed.

S404, the terminal equipment judges whether a penalty timer is configured on the network side.

The penalty timer configured at the network side is used for indicating the duration of the terminal equipment which can not initiate the IMS registration. The specific duration of the penalty timer configured on the network side is not limited.

If the terminal device judges that the network side is configured with the penalty timer, S408 is executed, the penalty timer configured on the network side is started, and before the penalty timer is overtime, the terminal device can not initiate IMS registration.

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

S405, the terminal equipment judges whether a penalty timer is configured in the USIM card.

And the penalty timer configured in the USIM card is used for indicating the duration of the time that the terminal equipment cannot initiate IMS registration. The specific duration of the penalty timer configured in the USIM card is not limited.

If the terminal equipment judges that the USIM card is configured with the punishment timer, S409 is executed, the punishment timer configured in the USIM card is started, and before the punishment timer is overtime, the terminal equipment can not initiate IMS registration.

And if the terminal equipment judges that the penalty timer is not configured in the USIM card, executing S410 and starting a preset penalty timer. The preset penalty timer is used for indicating the duration that the terminal equipment cannot initiate the IMS registration. The specific duration of the predetermined penalty timer is not limited, for example, 12 minutes.

S406, executing the subsequent operation according to the retry indication information.

And S407, executing subsequent operations according to the communication protocol.

And S408, starting a penalty timer configured on the network side.

And S409, starting a penalty timer configured in the USIM card.

And S410, starting a preset penalty timer.

It should be noted that, when the IMS registration of the terminal device in the 5G network fails, the terminal device may fall back to the 4G network, and the step of falling back to the 4G network by the terminal device is not shown in the flowchart shown in fig. 4. In practical applications, the step of the terminal device falling back to the 4G network may be performed after S401.

Optionally, the implementation manner of dropping the terminal device back to the 4G network is not limited in the present application, and may be an existing flow, for example, implemented by a Tracking Area Update (TAU) flow.

As can be seen, for a scenario in which the terminal device fails to register in the IMS in the 5G network and does not acquire the retry indication information, the terminal device starts a penalty timer. The penalty timer may be one of a penalty timer configured on the network side, a penalty timer configured in the USIM card, and a preset penalty timer, which are shown in a dashed box in fig. 4. The terminal equipment can not initiate IMS registration before the penalty timer is overtime. Generally, an IMS Access Point Name (APN) does not change depending on whether the access technology is 4G or 5G, which causes the penalty timer to still run and take effect after the terminal device falls back to the 4G network, even if IMS is available under the 4G radio access technology, the terminal device still cannot initiate IMS registration in the 4G network, and only after the penalty timer is overtime, the terminal device can initiate IMS registration in the 4G network. This results in a lower IMS registration rate. Moreover, the terminal device cannot initiate a voice service in the 4G network before the penalty timer expires, and if the terminal device initiates the voice service, the terminal device will fall back to the CS domain of the 2G network or the 3G network, which affects the voice service of the user, reduces the voice call quality, and the user experience of the call is very poor. Moreover, if the 2G network or the 3G network in the area where the user is located is unavailable, the terminal device cannot perform the voice service, which affects the basic function 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 fig. 5 (a), an icon 121 may be included in the desktop 100 of the handset to indicate that the handset currently resides in the 5G network, but there is no

icon

111 or 112 in fig. 2 to indicate that the handset has failed IMS registration in the 5G network. Thereafter, the handset falls back to the 4G network, as shown in fig. 5 (b), an icon 122 may be included in the desktop 100 of the handset, indicating that the handset currently resides in the 4G network, but there is no icon 111 in fig. 3, which indicates that the handset has not successfully IMS registered in the 4G network.

The IMS registration method provided by the embodiment of the application can be applied to a scene that the IMS registration of the terminal equipment fails in the 5G network and the retry indication information is not acquired. When the terminal equipment falls back to the 4G network, the rejection reason value of IMS registration failure in the 5G network is determined to be the preset reason value and the IMS of the 4G network is available, the IMS registration can be immediately initiated in the 4G network, and the time length of a punishment timer does not need to be considered. The IMS registration can be immediately initiated after the terminal equipment falls back to the 4G network, so that the IMS registration rate is improved, the voice service can be timely carried out in the 4G network, the call quality of the voice service is improved, and the call experience of a user is improved.

The technical solution of the present application will be described in detail by specific examples. The following embodiments may be combined with each other and may not be described in detail in some embodiments for the same or similar concepts or processes.

Embodiments of the present application may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. The terms "first," "second," "third," "fourth," and the like in the embodiments of the present application, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Fig. 6 is a flowchart of an IMS registration method according to an embodiment of the present application. In the IMS registration method provided in 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, receiving a PDU session rejection message in the 5G network.

The PDU session rejection message is used for indicating that the terminal equipment is rejected when initiating IMS registration in the 5G network, and comprises a rejection reason value.

The PDU session reject message may refer to the related description in S401 in fig. 4, and has similar principles, which are not described herein again.

And S602, when the terminal equipment falls back to the 4G network, and the retry indication information is not acquired and the reject reason value is determined to be a preset reason value, initiating IMS registration in the 4G network.

The retry indication information may refer to the related description in S402 in fig. 4, and the principle is similar, which is not described herein again.

The present embodiment does not limit the specific content of the preset reason value. Alternatively, referring to table 1, the preset cause values may include, but are not limited to: the operator defines forbidden (# cause value No. 8), service option not supported (# cause value No. 32), requested service option not subscribed (# cause value No. 33), and DNN missing or unknown in slice (# cause value No. 70).

Alternatively, the preset cause value may be stored in a black list. The present embodiment does not limit the storage location and the storage manner of the black list. For example, the blacklist may be a table. The preset reason value is stored in the blacklist, and the blacklist can be operated in the subsequent process of increasing, deleting or modifying the preset reason value, so that the cost and the complexity of subsequent maintenance and modification are reduced due to the configurable blacklist.

As can be seen, in the IMS registration method provided in this embodiment, for a scenario where the terminal device fails to perform IMS registration in the 5G network and does not acquire retry indication information, when the terminal device falls back to the 4G network, and it is determined that the reject cause value of the IMS registration failure in the 5G network is the preset cause value and the IMS of the 4G network is available, the IMS registration may be immediately initiated in the 4G network, without considering a penalty timer. Therefore, the terminal equipment can immediately initiate IMS registration after falling back to the 4G network, the IMS registration rate is improved, the voice service can be timely carried out in the 4G network, the call quality of the voice service is improved, and the call experience of a user is improved.

Fig. 7 is a schematic diagram of an interface change of the mobile phone in the process shown in fig. 6. As shown in fig. 7 (a), an icon 121 may be included in the desktop 100 of the handset to indicate that the handset currently resides in the 5G network, but there is no

icon

111 or 112 in fig. 2 to indicate that the handset has failed IMS registration in the 5G network. Thereafter, the handset falls back to the 4G network, and as shown in fig. 7 (b),

icons

111 and 122 may be included in the desktop 100 of the handset. Icon 122 indicates that the mobile phone currently resides in the 4G network, icon 111 indicates that IMS registration of the mobile phone in the 4G network is successful, the voice service of the user can be timely carried by the IMS domain, and the user will have higher-definition call experience.

Optionally, in S602, determining that the retry indication information is not acquired may include:

and determining that the PDU session rejection message does not carry retry indication information and no retry indication information is set in a Universal Subscriber Identity Module (USIM) card of the terminal equipment.

Specifically, reference may be made to the relevant description in S402 in fig. 4, and the principle is similar, which is not described herein again.

Optionally, in an implementation manner, after determining that the retry indication information is not acquired and determining that the reject reason value is the preset reason value in S602, the IMS registration method provided in this embodiment may further include:

and starting a penalty timer, wherein the penalty timer is used for indicating the duration of the time that the terminal equipment can not initiate the IMS registration.

In this implementation, the terminal device may still start the penalty timer when the IMS registration fails in the 5G network and the retry indication information is not obtained. However, the terminal device initiates IMS registration after dropping back to the 4G network without being affected by the penalty timer, that is, when the terminal device drops back to the 4G network and determines that the reject cause value of IMS registration failure in the 5G network is the preset cause value and the IMS of the 4G network is available, IMS registration can still be immediately initiated in the 4G network, so that the IMS registration rate is improved, and the voice service can be ensured to be performed in the 4G network in time. Moreover, the process of starting the penalty timer is consistent with the existing process, so that the modification of the existing process is avoided, and the method is easy to realize.

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 at the network side, a penalty timer configured in the USIM card and a preset penalty timer.

Optionally, starting the penalty timer may include:

and if the first penalty timer configured by the 5G network is obtained, starting the first penalty timer.

And if the first penalty timer configured by the 5G network is not acquired and the second penalty timer is configured in the USIM card of the terminal equipment, starting the second penalty timer.

And if the first penalty timer configured by the 5G network is not acquired and the second penalty timer is not configured in the USIM card of the terminal equipment, starting a preset third penalty timer.

Specifically, reference may be made to the relevant descriptions in S404 to S405 and S408 to S410 in fig. 4, which have similar principles and are not described herein again.

Optionally, in another implementation manner, after determining that the retry indication information is not acquired and determining that the reject reason value is the preset reason value in S602, the IMS registration method provided in this embodiment may further include:

and not starting a penalty timer, wherein the penalty timer is used for indicating the duration of the time that the terminal equipment cannot initiate the IMS registration.

Optionally, fig. 8 is another flowchart of an IMS registration method provided in the embodiment of the present application. In another embodiment of the present application, a specific implementation manner of the IMS registration method is provided on the basis of the embodiment shown in fig. 6. In this embodiment, the terminal device may start a penalty timer when IMS registration fails in the 5G network and no retry indication information is acquired.

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

s401 to S410, which may specifically refer to the related description in fig. 4, the principle is 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 IMS registration of the terminal device in the 5G network fails, the terminal device may fall back to the 4G network, and the step of falling back to the 4G network by the terminal device is not shown in the flowchart shown in fig. 8. In practical applications, the step of the terminal device falling back to the 4G network may be performed after S401.

In the IMS registration method provided in this embodiment, when the terminal device fails to perform IMS registration in the 5G network and does not acquire retry indication information, the penalty timer may be started. When the terminal device falls back to the 4G network, and the rejection reason value of IMS registration failure in the 5G network is determined to be the preset reason value and the IMS of the 4G network is available, IMS registration can be immediately initiated in the 4G network, and the penalty timer is actually in an invalid state. Therefore, the terminal equipment can immediately initiate IMS registration after falling back to the 4G network, the IMS registration rate is improved, the voice service can be timely carried out in the 4G network, the call quality of the voice service is improved, and the call experience of a user is improved.

Optionally, fig. 9 is another flowchart of an IMS registration method provided in the embodiment of the present application. In 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 IMS registration fails in the 5G network and the retry indication information is not acquired, the terminal device does not start the penalty timer. Wherein the preset reason value can be stored in a black list.

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

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

S901, the terminal equipment judges whether the rejection reason value in the PDU conversation rejection message is the reason value in the blacklist.

If the terminal equipment judges that the rejection reason value in the PDU conversation rejection message is not the reason value in the blacklist, S407 is executed, and the subsequent operation is executed according to the relevant regulations in the communication protocol.

If the terminal device determines that the reject cause value in the PDU session reject message is a cause value in the blacklist, S902 is performed.

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

And S407, performing subsequent operations according to the communication protocol.

S401, S402, S406, and S407 may specifically refer to the description of the relevant steps in fig. 4, and the principles are similar, and are not described herein again.

It should be noted that, when the IMS registration of the terminal device in the 5G network fails, the terminal device may fall back to the 4G network, and the step of falling back to the 4G network by the terminal device is not shown in the flowchart shown in fig. 9. In practical applications, the step of the terminal device falling back to the 4G network may be performed after S401.

In the IMS registration method provided in this embodiment, when the terminal device fails to perform IMS registration in the 5G network and does not acquire retry indication information, the penalty timer is not started. When the terminal equipment falls back to the 4G network, the rejection reason value of IMS registration failure in the 5G network is determined to be the preset reason value, and the IMS of the 4G network is available, IMS registration can be immediately initiated in the 4G network, the IMS registration rate is improved, moreover, the voice service can be timely carried out in the 4G network, the call quality of the voice service is improved, and the call experience of a user is improved.

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

a receiving module 1001, configured to receive a PDU session reject 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 includes a reject cause value.

The processing module 1002 is configured to initiate an 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 reject cause value is the preset cause value.

Optionally, the processing module 1002 is specifically configured to:

and determining that the PDU session rejection message does not carry retry indication information and no retry indication information is set in a USIM card of the terminal equipment.

Optionally, the preset cause values include: the operator defines forbidden, service option not supported, requested service option not subscribed and missing or unknown DNNs in the slice.

Optionally, the processing module 1002 is further configured to:

and after determining that the retry indication information is not acquired and determining that the rejection reason value is the preset reason value, starting a penalty timer, wherein the penalty timer is used for indicating the duration of the terminal equipment which cannot initiate the IMS registration.

Optionally, the processing module 1002 is specifically configured to:

Optionally, the processing module 1002 is further configured to:

and if the first penalty timer configured by the 5G network is not acquired and a second penalty timer is configured in a USIM card of the terminal equipment, starting the second penalty timer.

Optionally, the processing module 1002 is further configured to:

and after determining that the retry indication information is not acquired and determining that the rejection reason value is the preset reason value, not starting a penalty timer, wherein the penalty timer is used for indicating the duration of the time that the terminal equipment cannot initiate the IMS registration.

Optionally, the preset reason value is stored in a black list.

The terminal device provided in this embodiment may execute the IMS registration method provided in this embodiment of the present invention, and the technical principle and the technical effect are similar, which are not described herein again.

It will be appreciated that the terminal device, in order to implement the above-described functions, comprises corresponding hardware and/or software modules for performing the respective functions. The present application is capable of being implemented in hardware or a combination of hardware and computer software in conjunction with the exemplary algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, with the embodiment described in connection with the particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the terminal device may be divided into the functional modules according to the above method example, 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, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation. It should be noted that the names of the modules in the embodiments of the present application are illustrative, 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 in an embodiment of the present application, where 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 one communication component, which may be a baseband chip. The memory 1104 is coupled to the processor 1101 by a bus 1105. The memory 1104 may be used for storing at least one program instruction, and the processor 1101 is used for executing the at least one program instruction to implement the technical solutions of the above-mentioned embodiments. The implementation principle and technical effect are similar to those of the embodiments related to the method, and are not described herein again.

When the terminal is started, the processor can read the software program in the memory, interpret and execute the instruction of the software program, and process the data of the software program. When data needs to be sent through the antenna, the processor performs baseband processing on the data to be sent, and then outputs baseband signals to a control circuit in the control circuit, and the control circuit performs radio frequency processing on the baseband signals and then sends the radio frequency signals to the outside through the antenna in the form of electromagnetic waves. When data is sent to the terminal, the control circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data.

Those skilled in the art will appreciate that fig. 11 shows only one memory and processor for ease of illustration. 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, and the like, which is not limited in this application.

As an alternative implementation manner, the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used for processing communication data, and the central processing unit is mainly used for executing a software program and processing data of the software program. Those skilled in the art will appreciate that the baseband processor and the central processing unit may be integrated into a single processor, or may be separate processors, interconnected via bus, etc. Those skilled in the art will appreciate that the terminal may include a plurality of baseband processors to accommodate different network formats, a plurality of central processors to enhance its processing capability, and various components of the terminal may be connected by various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the 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 may be integrated within the processor or may be separate from the processor. The memory includes a Cache, which may store frequently accessed data/instructions.

In the embodiments 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, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SS), and may also be a volatile memory (volatile memory), for example, a random-access memory (RAM). The memory is 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, not limited thereto.

The memory in the embodiments of the present application may also be circuitry or any other device capable of performing 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, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored in, or transmitted from, a computer-readable storage medium to another computer-readable storage medium, for example, from one website, computer, server, or data center, over a wired (e.g., coaxial cable, fiber optics, Digital Subscriber Line (DSL), or wireless (e.g., infrared, wireless, microwave, etc.) network, the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more integrated servers, data centers, etc., the available medium may be magnetic medium (e.g., floppy disk, hard disk, magnetic tape), optical medium (e.g., digital video disc (digital video disc, DWD), or a semiconductor medium (e.g., SSD), etc.

The embodiment of the present application provides a computer program product, which, when running on a terminal, enables the terminal to execute the technical solutions in the above embodiments. The principle and technical effects are similar to those of the related embodiments, and are not described herein again.

The embodiment of the present application provides a computer-readable storage medium, on which program instructions are stored, and when the program instructions are executed by a terminal, the terminal is enabled to execute the technical solutions of the above embodiments. The principle and technical effects are similar to those of the related embodiments, and are not described herein again. In summary, the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and these modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An IMS registration method, comprising:

receiving a packet data unit, PDU, session reject message in a 5G network; the PDU session rejection message is used for indicating that terminal equipment is rejected when initiating IP multimedia subsystem IMS registration in the 5G network, and the PDU session rejection message comprises a rejection reason value;

and when the terminal equipment falls back to the 4G network and determines that retry indication information is not acquired and the reject reason value is a preset reason value, initiating IMS registration in the 4G network.

2. The method of claim 1, wherein the determining that no retry indication information is obtained comprises:

and determining that the PDU session rejection message does not carry the retry indication information, and the retry indication information is not set in a Universal Subscriber Identity Module (USIM) card of the terminal equipment.

3. The method of claim 1, wherein the preset cause value comprises: the operator defines forbidden, service option not supported, requested service option not subscribed and missing or unknown data network names DNN in the slice.

4. The method according to any one of claims 1 to 3, wherein after determining that no retry indication information is obtained and determining that the reject cause value is a preset cause value, the method further comprises:

and starting a penalty timer, wherein the penalty timer is used for indicating the duration of the terminal equipment which can not initiate the IMS registration.

5. The method of claim 4, wherein starting a penalty timer comprises:

6. The method of claim 5, further comprising:

7. The method of claim 5 or 6, further comprising:

8. The method according to any one of claims 1 to 3, wherein after determining that no retry indication information is obtained and determining that the reject cause value is a preset cause value, the method further comprises:

and not starting a penalty timer, wherein the penalty timer is used for indicating the duration of the time that the terminal equipment can not initiate the IMS registration.

9. A method according to any one of claims 1 to 3, characterized in that the preset cause value is stored in a black list.

10. A terminal device, comprising:

a receiving module, configured to receive a packet data unit PDU session reject message in a 5G network; the PDU session rejection message is used for indicating that the terminal equipment is rejected when initiating IP multimedia subsystem IMS registration in the 5G network, and the PDU session rejection message comprises a rejection reason value;

and the processing module is used for initiating IMS registration in the 4G network when the terminal equipment falls back to the 4G network, and determines that retry indication information is not acquired and the reject reason value is a preset reason value.

11. The terminal device of claim 10, wherein the processing module is specifically configured to:

12. The terminal device according to claim 10, wherein the preset cause value comprises: the operator defines forbidden, service option not supported, requested service option not subscribed and missing or unknown data network names DNN in the slice.

13. The terminal device according to any one of claims 10 to 12, wherein the processing module is further configured to:

and after determining that the retry indication information is not acquired and determining that the rejection reason value is a preset reason value, starting a penalty timer, wherein the penalty timer is used for indicating the duration of the terminal equipment which cannot initiate IMS registration.

14. The terminal device of claim 13, wherein the processing module is specifically configured to:

15. The terminal device of claim 14, wherein the processing module is further configured to:

16. The terminal device according to claim 14 or 15, wherein the processing module is further configured to:

and if the first punishment timer configured by the 5G network is not acquired and a second punishment timer is not configured in a USIM card of the terminal equipment, starting a preset third punishment timer.

17. The terminal device according to any one of claims 10 to 12, wherein the processing module is further configured to:

and after determining that the retry indication information is not acquired and that the rejection reason value is a preset reason value, not starting a penalty timer, wherein the penalty timer is used for indicating the duration of the terminal equipment which cannot initiate IMS registration.

18. The terminal device according to any of claims 10 to 12, wherein the preset cause value is stored in a black list.

19. A terminal device comprising a processor and a memory, the processor being configured to invoke a program stored in the memory to perform the method of any one of claims 1 to 9.

20. A computer readable storage medium storing computer instructions which, when run on a terminal device, cause the terminal device to perform the method of any one of claims 1 to 9.