Data radio bearer configuration method and apparatus, user equipment, and storage medium

Abstract

The present disclosure relates to a data radio bearer configuration method and device, user equipment and storage medium, which are applied to UE. The method comprises: in response to that the UE is switched from a first communication system to a second communication system and a target update process is completed in the second communication system, determining that a first DRB configured by a network side device for the UE is lost, the first DRB comprising a DRB corresponding to an IMS default bearer established in the first communication system; and obtaining a second DRB reconfigured by the network side device for the UE, the second DRB being used for reestablishing the IMS default bearer in the second communication system. According to the present disclosure, in the case that the network side abnormally releases the DRB corresponding to the IMS default bearer, the UE can timely restore the VoLTE service after completing the target update process, thereby ensuring the stability and reliability of the VoLTE service.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a data wireless bearer configuration method, apparatus, user equipment, and storage medium. Background Technology

[0002] Each generation upgrade of a communication system is a lengthy process. In the early stages of 5G commercialization, 5G network coverage can begin with hotspot coverage and gradually achieve full-area coverage. During this process, 4G networks will continue to undertake the task of wide-area coverage. Therefore, to ensure a good voice and data experience for users during the upgrade from 4G to 5G, a robust VoLTE (Voice over Long-Term Evolution) network is essential. In the early stages of 5G commercialization, UEs (User Equipment) may frequently need to switch between 4G and 5G communication systems.

[0003] According to the 3GPP (3rd Generation Partnership Project) protocol, in single registration mode, since there is an N26 interface that supports interoperability between the MME (Mobility Management Entity) network element of the 4G core network and the AMF (Access and Mobility Management Function) network element of the 5G core network, the user context can be switched between the two communication systems when the UE switches between the 4G and 5G communication systems. That is, in the communication system after the switch, the UE does not need to re-establish the existing bearer or re-register the existing service.

[0004] In related technologies, the UE typically determines whether the IMS default bearer is activated in the handover communication system based on the received NAS message. However, in the aforementioned related technologies, if there is an anomaly in the DRB configuration for the UE on the network side, the UE may experience prolonged periods without VoLTE service in the handover communication system, affecting normal user experience. Summary of the Invention

[0005] This disclosure provides a data wireless bearer configuration method, apparatus, user equipment, and computer-readable storage medium to address the shortcomings of related technologies.

[0006] According to a first aspect of the present disclosure, a data radio bearer configuration method is proposed, applied to a UE, the method comprising:

[0007] In response to the UE switching from a first communication system to a second communication system and completing a target update process in the second communication system, it is determined that the first data radio bearer (DRB) configured for the UE by the network-side device has been lost; wherein, the target update process includes the update process of the UE registering with the second communication system; the first DRB includes the DRB corresponding to the IMS default bearer already established in the first communication system;

[0008] Obtain the second DRB reconfigured by the network-side device for the UE; wherein the second DRB is used to re-establish the IMS default bearer in the second communication system.

[0009] Optionally, before switching from the first communication system to the second communication system, the method further includes:

[0010] Obtain the first DRB configured by the network-side device for the UE.

[0011] Optionally, before completing the target update process, the method further includes:

[0012] The network-side device receives a first Radio Resource Control (RRC) reconfiguration message; the first RRC reconfiguration message includes at least one DRB configured by the network-side device for the UE.

[0013] The determination that the first DRB configured for the UE by the network-side device has been lost includes:

[0014] In response to determining that the first DRB is not included in the at least one DRB, it is determined that the first DRB configured by the network-side device for the UE is lost.

[0015] Optionally, the first communication system includes a 4G communication system, the second communication system includes a 5G communication system, and the target update process is a mobility registration update process; obtaining the second DRB reconfigured by the network-side device for the UE includes:

[0016] Send a Protocol Data Unit (PDU) session establishment request message to the network-side device to request the establishment of the IMS default bearer;

[0017] The network-side device receives a second RRC reconfiguration message, which includes a second DRB reconfigured by the network-side device for the UE.

[0018] Send a second RRC reconfiguration complete message to the network-side device;

[0019] After receiving the PDU session establishment accept message sent by the network-side device, the IMS default bearer is re-established in the second communication system.

[0020] Optionally, the PDU session establishment request message includes a request parameter for the Proxy Call Session Control Function (P-CSCF) address, which is used to indicate to the network-side device that a request is made to establish an IMS default bearer; the PDU session establishment acceptance message includes a Data Network Name (DNN) parameter, which is used to indicate that the establishment of the IMS default bearer is complete.

[0021] Optionally, the first communication system includes a 5G communication system, the second communication system includes a 4G communication system, and the target update process is a Tracking Area Update (TAU) process; obtaining the second DRB reconfigured for the UE by the network-side device includes:

[0022] Send a Packet Data Network (PDN) connection request message to the network-side device to request the establishment of the IMS default bearer;

[0023] The network-side device receives a third RRC reconfiguration message, which includes a second DRB reconfigured by the network-side device for the UE.

[0024] Send a second RRC reconfiguration complete message to the network-side device;

[0025] Receive the Activate Default Evolution Packet System EPS Bearer Context Request message sent by the network-side device;

[0026] After sending an Activate Default EPS Bearer Context Accept message to the network-side device, the IMS default bearer is re-established in the second communication system.

[0027] Optionally, the PDN connection request message includes an Access Point Name (APN) parameter, which is used to indicate a request to establish an IMS default bearer.

[0028] According to a second aspect of the present disclosure, a data radio bearer configuration apparatus is provided, the apparatus comprising:

[0029] A determination module is configured to determine, in response to a UE switching from a first communication system to a second communication system and completing a target update process in the second communication system, that the first data radio bearer (DRB) configured for the UE by the network-side device has been lost; wherein the target update process includes the UE's registration update process with the second communication system; and the first DRB includes the DRB corresponding to the IMS default bearer already established in the first communication system.

[0030] The first acquisition module is used to acquire the second DRB reconfigured by the network-side device for the UE; wherein the second DRB is used to re-establish the IMS default bearer in the second communication system.

[0031] According to a third aspect of the present disclosure, a user equipment is provided, comprising:

[0032] processor;

[0033] Memory used to store processor-executable instructions;

[0034] The processor is used to implement the above-described data wireless bearer configuration method.

[0035] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, is used to implement the above-described data wireless bearer configuration method.

[0036] The technical solutions provided by the embodiments of this disclosure can include at least the following beneficial effects:

[0037] According to embodiments of this disclosure, in response to a switch from a first communication system to a second communication system and completion of a target update process in the second communication system, if it is determined that the first DRB configured for the UE by the network-side device is lost, the UE can obtain a second DRB reconfigured for the UE by the network-side device. The first DRB includes a DRB corresponding to the IMS default bearer already established in the first communication system, and the second DRB is used to re-establish the IMS default bearer in the second communication system. Therefore, the UE can determine whether the IMS default bearer already established in the first communication system can continue to provide VoLTE service in the second communication system after the switch, based on whether the first DRB corresponding to the IMS default bearer is lost. Furthermore, if it is determined that the first DRB is lost, in response to completion of the target update process in the second communication system after the switch, the UE can immediately obtain the second DRB reconfigured for it by the network-side device to re-establish the IMS default bearer in the second communication system after the switch. Thus, even if the network side abnormally releases the DRB corresponding to the IMS default bearer, the UE can promptly restore VoLTE service, ensuring the stability and reliability of the VoLTE service. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic flowchart illustrating a data radio bearer configuration method according to an embodiment of the present disclosure.

[0040] Figure 2 This is a schematic flowchart illustrating another data radio bearer configuration method according to embodiments of the present disclosure.

[0041] Figure 3 This is a schematic flowchart illustrating another data radio bearer configuration method according to embodiments of the present disclosure.

[0042] Figure 4 This is a schematic flowchart illustrating another data radio bearer configuration method according to embodiments of the present disclosure.

[0043] Figure 5 This is a schematic flowchart illustrating another data radio bearer configuration method according to embodiments of the present disclosure.

[0044] Figure 6 This is a signaling interaction diagram illustrating a data radio bearer configuration method according to an embodiment of the present disclosure.

[0045] Figure 7 This is a signaling interaction diagram illustrating another data radio bearer configuration method according to an embodiment of the present disclosure.

[0046] Figure 8 This is a schematic block diagram illustrating a data wireless bearer configuration apparatus according to embodiments of the present disclosure.

[0047] Figure 9 This is a schematic block diagram illustrating another data wireless bearer configuration apparatus according to embodiments of the present disclosure.

[0048] Figure 10 This is a schematic block diagram illustrating another data wireless bearer configuration apparatus according to embodiments of the present disclosure.

[0049] Figure 11 This is a schematic block diagram illustrating another data wireless bearer configuration apparatus according to embodiments of the present disclosure.

[0050] Figure 12 This is a schematic block diagram illustrating another data wireless bearer configuration apparatus according to embodiments of the present disclosure.

[0051] Figure 13 This is a schematic block diagram illustrating a data wireless bearer configuration apparatus according to embodiments of the present disclosure. Detailed Implementation

[0052] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0053] Each generation upgrade of a communication system is a lengthy process. In the early stages of 5G commercialization, 5G network coverage can begin with hotspot coverage and gradually achieve full-area coverage. During this process, 4G networks will continue to undertake the task of wide-area coverage. Therefore, to ensure users' voice and data experience during the upgrade from 4G to 5G, a robust VoLTE (Voice over Long-Term Evolution) network is essential.

[0054] For example, when a 5G phone is within 5G network coverage, it can prioritize using the 5G network; and when a 5G phone is outside 5G network coverage, it can use the 4G network. If a 5G phone moves from within 5G network coverage to outside 5G network coverage, it can switch from 5G to 4G, and the TAU procedure (Tracking Area Update procedure) will be executed on the 4G network; if a 5G phone moves from outside 5G network coverage to within 5G network coverage, it can switch from 4G to 5G, and the Registration procedure will be executed on the 5G network.

[0055] Therefore, in the early stages of commercial use of 5G communication systems, UE (User Equipment) may frequently need to switch between 4G and 5G communication systems.

[0056] According to the 3GPP (3rd Generation Partnership Project) protocol, in single registration mode, since there is an N26 interface that supports interoperability between the MME (Mobility Management Entity) network element of the 4G core network and the AMF (Access and Mobility Management Function) network element of the 5G core network, the user context can be switched between the two communication systems when the UE switches between the 4G and 5G communication systems. That is, in the communication system after the switch, the UE does not need to re-establish the existing bearer or re-register the existing service.

[0057] For example, after a UE switches from a 4G network to a 5G network, during the registration update process, the network side can use RRC (Radio Resource Control) reconfiguration messages to reconfigure the DRB (Data Radio Bearer) that was already configured for the UE in the 4G network and corresponds to the default IMS (IP Multimedia Subsystem) bearer for the UE in the 5G network. Therefore, after switching to a 5G network, the UE does not need to re-establish the default IMS bearer or re-register for IMS services.

[0058] For example, after a UE switches from a 5G network to a 4G network, during the registration update process, the network side can use RRC reconfiguration messages to reconfigure the DRB corresponding to the IMS default bearer that has been configured for the UE in the 5G network to the UE in the 4G network. Therefore, after the UE switches to the 4G network, it does not need to re-establish the IMS default bearer or re-register for the IMS service.

[0059] In related technologies, the received NAS (Non-Access Stratum) message indicates that in the post-handover communication system, either the PDN (Packet Data Network) connection corresponding to the IMS default bearer is active, or the PDU (Protocol Data Unit) session corresponding to the IMS default bearer is active. Following the aforementioned protocol provisions, the UE typically will not actively request to re-establish the IMS default bearer or re-register for IMS. However, if an anomaly occurs during DRB reconfiguration on the network side, the UE may experience prolonged VoLTE service in the post-handover communication system.

[0060] Analysis revealed that the problem arose because the network side lost the DRB corresponding to the IMS default bearer during the process of reconfiguring the DRB previously configured for the UE in the post-handover communication system via RRC reconfiguration messages. Since the DRB is the entity of the bearer, if the DRB no longer exists, the corresponding service cannot continue to be used. Therefore, the loss of the DRB corresponding to the IMS default bearer means that the IMS default bearer can no longer provide VoLTE service to the UE in the post-handover communication system.

[0061] Therefore, in the aforementioned technologies, when the DRB corresponding to the IMS default bearer is abnormally released on the network side, the IMS default bearer can no longer provide VoLTE service to the UE. However, the UE believes that there is no need to re-establish the IMS default bearer because the PDN connection or PDU corresponding to the IMS default bearer indicated in the received NAS message is already active. This results in the UE having no VoLTE service for a long time in the communication system after the handover, affecting the normal use of the user.

[0062] In view of this, this disclosure provides a technical solution for determining the actual activation status of the corresponding bearer based on the actual configuration status of the DRB. In implementation, during the handover process between two communication systems, if it is determined that the DRB corresponding to the IMS default bearer has been normally activated in the new communication system, then there is no need to re-establish the IMS default bearer or re-register IMS. Otherwise, even if the received NAS message indicates that the activation status of the IMS default bearer is normal, the UE can immediately and proactively obtain the DRB corresponding to the IMS default bearer reconfigured by the network side. That is, the UE can proactively request the re-establishment of the IMS default bearer and re-register IMS. Therefore, in the event that the network side abnormally releases the DRB corresponding to the IMS default bearer, VoLTE service can be restored promptly, rather than only discovering the lack of VoLTE service when the UE requests to initiate call or SMS services, thus ensuring the stability and reliability of VoLTE service.

[0063] The following describes the data wireless bearer configuration method provided in this disclosure through specific embodiments and application scenarios.

[0064] In the embodiments disclosed herein, the UE involved may include, but is not limited to, electronic devices such as mobile phones, tablets, wearable devices, sensors, and IoT devices. The UE can communicate with a base station. The base station may include, but is not limited to, a 4G base station, a 5G base station, a 6G base station, or a base station of any generation of communication system.

[0065] In the embodiments disclosed herein, the network-side equipment involved may include the base station and the core network corresponding to the base station. The core network may include, but is not limited to, EPC (Evolved Packet Core) and 5GC (5Generation Core).

[0066] Please see Figure 1 , Figure 1 This is a schematic flowchart illustrating a data radio bearer configuration method according to embodiments of the present disclosure. The method can be applied to the UE, such as... Figure 1 As shown, the method may include:

[0067] In step 102, in response to the UE switching from the first communication system to the second communication system and completing the target update process in the second communication system, it is determined that the first DRB configured by the network-side device for the UE is lost; wherein, the target update process includes the update process of the UE registering to the second communication system; the first DRB includes the DRB corresponding to the IMS default bearer established in the first communication system.

[0068] The IMS default bearer can be a bearer used to transmit IMS service signaling.

[0069] The first communication system and the second communication system can be 4G, 5G, or any other generation of communication system, and this disclosure does not impose any restrictions. Furthermore, the first communication system and the second communication system are different communication systems, and switching between them is possible. For example, the first communication system can be a 4G communication system, and the second communication system can be a 5G communication system. Or, for another example, the first communication system can be a 5G communication system, and the second communication system can be a 4G communication system.

[0070] Accordingly, the target update process may include the update process for the UE to register with the second communication system. For example, when the second communication system is a 4G communication system, the target update process may be a TAU process. As another example, when the second communication system is a 5G communication system, the target update process may be a registration update process. It should be noted that, in the registration update process, since the 5GS registration type parameter in the registration request message (i.e., REGISTRATION REQUEST message) sent by the UE to the network-side device can be set to "mobility registration updating", the registration update process can also be called a mobility registration update process. As yet another example, when the second communication system is any other generation of communication system, the target update process may be a corresponding update process, and this disclosure does not impose any limitations.

[0071] Accordingly, the UE completes the target update process in the second communication system. This can be understood as follows: when the second communication system is a 5G communication system, the UE completes the registration update process after sending a registration update completion message (i.e., a REGISTRATION COMPLETE message) to the network-side device; or, when the second communication system is a 4G communication system, the UE completes the TAU update process after sending a tracking area update completion message (i.e., a TRACKING AREA UPDATE COMPLETE message) to the network-side device.

[0072] The first DRB can be the DRB corresponding to the IMS default bearer that the network-side device has configured for the UE in the first communication system. It should be noted that, if the first DRB is not lost, after the UE switches from the first communication system to the second communication system, the network-side device should continue to configure the first DRB for the UE in the second communication system, and the first DRB will still serve as the DRB corresponding to the IMS default bearer.

[0073] For example, in the first communication system, the network-side device configures a first DRB for the UE as a DRB corresponding to the IMS default bearer already established in the first communication system; in response to the UE switching from the first communication system to the second communication system and completing the target update process in the second communication system, the UE can determine that the first DRB configured for it by the network-side device has been lost.

[0074] Optionally, in step 102, the UE can switch from the first communication system to the second communication system through any of the following methods: the UE initiates network reselection, the network-side device initiates network redirection, or network handover. This disclosure does not impose any limitations. For specific implementation methods of network reselection / redirection / handover, please refer to relevant technologies, which will not be elaborated here.

[0075] In step 104, the second DRB reconfigured by the network-side device for the UE is obtained; wherein the second DRB is used to re-establish the IMS default bearer in the second communication system.

[0076] The second DRB can be a DRB that the UE actively requests the network-side device to reconfigure for the UE in the second communication system when the first DRB is lost.

[0077] For example, in response to the UE switching from the first communication system to the second communication system and completing the target update process in the second communication system, if it is determined that the first DRB configured by the network-side device for the UE is lost, the UE can obtain the second DRB reconfigured by the network-side device for the UE in order to re-establish the IMS default bearer in the second communication system.

[0078] As can be seen from the above embodiments, in response to a UE switching from a first communication system to a second communication system and completing the target update process in the second communication system, if it is determined that the first DRB configured for the UE by the network-side device is lost, the UE can obtain the second DRB reconfigured for the UE by the network-side device. The first DRB includes the DRB corresponding to the IMS default bearer already established in the first communication system, and the second DRB is used to re-establish the IMS default bearer in the second communication system. Therefore, the UE can determine whether the IMS default bearer already established in the first communication system can continue to provide VoLTE service in the second communication system after the switch, based on whether the first DRB corresponding to the IMS default bearer is lost. Furthermore, if it is determined that the first DRB is lost, in response to completing the target update process in the second communication system after the switch, the UE can immediately obtain the second DRB reconfigured for it by the network-side device to re-establish the IMS default bearer in the second communication system after the switch. Thus, even if the network side abnormally releases the DRB corresponding to the IMS default bearer, the UE can promptly restore VoLTE service, ensuring the stability and reliability of VoLTE service.

[0079] Please see Figure 2 , Figure 2 It is based on Figure 1A schematic flowchart illustrating another data radio bearer configuration method based on the illustrated embodiment is shown. Figure 2 As shown, prior to the switch from the first communication system to the second communication system, the method may further include:

[0080] In step 202, the first DRB configured by the network-side device for the UE is obtained.

[0081] For example, if the UE is switching from another communication system to the first communication system before switching from the first communication system to the second communication system, then the UE has already completed the corresponding update process in the first communication system. In the corresponding update process of the first communication system, the UE can obtain the first DRB configured for the UE by the network-side device. Specifically, the UE can receive an RRC reconfiguration message sent by the network-side device, which may include the first DRB configured for the UE by the network-side device.

[0082] For example, if the UE is initially attached to the first communication system before switching from the first communication system to the second communication system, then during the attach process, the UE can obtain the first DRB configured for the UE by the network-side device. Specifically, the UE can receive an RRC reconfiguration message sent by the network-side device, which may include the first DRB configured for the UE by the network-side device.

[0083] As can be seen from the above embodiments, since the UE can first obtain the first DRB configured for the UE by the network-side device, and subsequently, in response to the UE switching from the first communication system to the second communication system and completing the target update process in the second communication system, if it is determined that the first DRB is lost, it can be determined that the IMS default bearer can no longer provide VoLTE service in the second communication system after the switch, and the UE can immediately obtain the second DRB reconfigured for the UE by the network-side device. Therefore, since the UE can obtain and record the first DRB corresponding to the IMS default bearer established in the first communication system before switching from the first communication system to the second communication system, and thus, in response to the UE switching from the first communication system to the second communication system and completing the target update process in the second communication system, it can determine whether the first DRB is lost, thereby improving the accuracy and reliability of configuring the DRB for the UE.

[0084] Please see Figure 3 , Figure 3 It is based on Figure 1A schematic flowchart illustrating another data radio bearer configuration method based on the illustrated embodiment is shown. Figure 3 As shown, before completing the target update process, the method may further include:

[0085] In step 302, a first RRC reconfiguration message is received from the network-side device; the first RRC reconfiguration message includes at least one DRB configured by the network-side device for the UE.

[0086] In this case, determining that the first DRB configured by the network-side device for the UE is lost may specifically include: in response to determining that the first DRB is not included in the at least one DRB, determining that the first DRB configured by the network-side device for the UE is lost.

[0087] It should be noted that, in response to determining that the first DRB is included in the at least one DRB, the UE can determine that the first DRB configured for the UE by the network-side device has not been lost, and the IMS default bearer has been normally mapped to the second communication system after the handover. There is no need to re-establish the IMS default bearer or re-register IMS.

[0088] The first RRC reconfiguration message can be used to reconfigure at least one DRB that the network-side device configured for the UE in the first communication system for the UE in the second communication system. For example, when the second communication system is a 4G communication system, the first RRC reconfiguration message can be an RRC ConnectionReconfiguration message; when the second communication system is a 5G communication system, the first RRC reconfiguration message can be an RRC Reconfiguration message.

[0089] It should be noted that, if the first DRB is not lost, the network-side device may configure at least one DRB for the UE, which may include at least: the first DRB corresponding to the IMS default bearer already established in the first communication system, and the DRB corresponding to the data default bearer already established in the first communication system.

[0090] For example, in the first communication system, the network-side device configures the DRB corresponding to the data default bearer as DRB ID1 for the UE, and configures the first DRB corresponding to the IMS default bearer as DRB ID2 for the UE. Before completing the target update process, the UE can receive a first RRC reconfiguration message sent by the network-side device. The first RRC reconfiguration message only includes the DRB ID1 corresponding to the data default bearer, but does not include the DRB ID2 corresponding to the IMS default bearer. In response to the completion of the target update process in the second communication system, since at least one DRB included in the first RRC reconfiguration message does not include the DRB ID2 corresponding to the IMS default bearer, it can be determined that the first DRB configured by the network-side device for the UE is lost. Therefore, the UE can immediately and actively obtain the second DRB reconfigured by the network-side device as DRB ID3.

[0091] It should be noted that in the embodiments shown above, the second DRB and the first DRB correspond to different DRB IDs, which is merely an exemplary description. In fact, since the first DRB has been lost, that is, the first DRB has been abnormally deactivated, the second DRB can also correspond to the same DRB ID as the first DRB. This disclosure does not impose any restrictions.

[0092] Additionally, it should be noted that, based on a similar method, the UE can also determine whether the DRB corresponding to the data default bearer already established in the first communication system is lost based on at least one DRB included in the first RRC reconfiguration message; furthermore, in response to determining that the at least one DRB does not include the DRB corresponding to the data default bearer, it can be determined that the DRB corresponding to the data default bearer configured by the network-side device for the UE is lost, and the UE can obtain the DRB reconfigured by the network-side device for the UE to re-establish the data default bearer in the second communication system.

[0093] As can be seen from the above embodiments, during the target update process, by receiving the first RRC reconfiguration message sent by the network-side device, the UE can obtain at least one DRB that the network-side device has configured for the UE in the first communication system; in response to the completion of the target update process, it can be determined whether the first DRB configured by the network-side device for the UE is lost based on whether the first DRB is included in the obtained at least one DRB, thereby improving the accuracy and reliability of configuring DRBs for the UE.

[0094] Please see Figure 4 , Figure 4 It is based on Figure 1 A schematic flowchart illustrating another data radio bearer configuration method based on the illustrated embodiment is shown. Figure 4 As shown, the first communication system may include a 4G communication system, the second communication system may include a 5G communication system, and the target update process may be a mobility registration update process; obtaining the second DRB reconfigured for the UE by the network-side device may specifically include:

[0095] In step 402, a PDU session establishment request message is sent to the network-side device to request the establishment of the IMS default bearer.

[0096] For example, in response to a UE switching from a 4G communication system to a 5G communication system and completing the mobility registration update process in the 5G communication system, it can be determined whether the first DRB configured by the network-side device for the UE has been lost; if the first DRB is lost, after completing the mobility registration update process in the 5G communication system, the UE can immediately send a PDU session establishment request message (i.e., PDU SESSIONESTABLISHMENT REQUEST message) to the network-side device to request the establishment of an IMS default bearer.

[0097] Optionally, in step 402, the PDU session establishment request message may include request parameters for the P-CSCF (Proxy-Call Session Control Function) address. These request parameters for the P-CSCF address can be used to instruct the network-side device to request the establishment of an IMS default bearer. For specific implementation details of the above embodiments, please refer to the relevant content in specification TS23.502, which will not be repeated here.

[0098] In step 404, a second RRC reconfiguration message sent by the network-side device is received, wherein the second RRC reconfiguration message includes a second DRB reconfigured by the network-side device for the UE.

[0099] In step 406, a second RRC reconfiguration complete message is sent to the network-side device.

[0100] For example, the UE can receive a second RRC reconfiguration message (i.e., an RRCReconfiguration message) sent by the network-side device. The second RRC reconfiguration message may include a second DRB (e.g., DRB ID3) reconfigured by the network-side device for the UE. In response to receiving the second RRC reconfiguration message, the UE can send a second RRC reconfiguration complete message (i.e., an RRC Reconfiguration Complete message) to the network-side device.

[0101] In step 408, after receiving the PDU session establishment acceptance message sent by the network-side device, the IMS default bearer is re-established in the second communication system.

[0102] For example, after sending the second RRC reconfiguration complete message to the network-side device, the UE can receive a PDU session establishment accept message (i.e., PDU SESSION ESTABLISHMENT ACCEPT message) sent by the network-side device, which indicates that the IMS default bearer has been re-established in the 5G communication system based on the second DRB.

[0103] Optionally, in step 408, the PDU session establishment acceptance message may include a DNN (Data Network Name) parameter, which can be used to indicate the completion of the IMS default bearer establishment.

[0104] Optionally, after step 408, the method may further include: performing IMS registration.

[0105] For example, after establishing the IMS default bearer, the UE can periodically send REGISTER messages to the network-side device to perform IMS registration; in response to receiving a 200 OK message from the network-side device, the IMS registration is completed.

[0106] As can be seen from the above embodiments, in response to the UE switching from a 4G communication system to a 5G communication system and completing the mobility registration update process in the 5G communication system, if the UE determines that the first DRB configured for the UE by the network-side device has been lost, it can obtain the second DRB reconfigured for the UE by the network-side device. Therefore, in the event that the network side abnormally releases the DRB corresponding to the IMS default bearer, the UE can immediately request the network-side device to re-establish the IMS default bearer after switching from a 4G communication system to a 5G communication system, thereby promptly obtaining the second DRB reconfigured for the UE by the network-side device, enabling timely restoration of VoLTE service and ensuring the stability and reliability of VoLTE service.

[0107] Please see Figure 5 , Figure 5 It is based on Figure 1 A schematic flowchart illustrating another data radio bearer configuration method based on the illustrated embodiment is shown. Figure 5 As shown, the first communication system may include a 5G communication system, the second communication system may include a 4G communication system, and the target update process may be a TAU process; obtaining the second DRB reconfigured for the UE by the network-side device may specifically include:

[0108] In step 502, a PDN connection request message for requesting the establishment of the IMS default bearer is sent to the network-side device.

[0109] For example, in response to a UE switching from a 5G communication system to a 4G communication system and completing the TAU process in the 4G communication system, it can be determined whether the first DRB configured by the network-side device for the UE has been lost; if the first DRB is lost, after completing the TAU process in the 4G communication system, the UE can immediately send a PDN connection request message (i.e., a PDN CONNECTIVITY REQUEST message) to the network-side device to request the establishment of an IMS default bearer.

[0110] Optionally, in step 502, the PDN connection request message may include an APN (Access Point Name) parameter, which can be used to indicate a request to establish an IMS default bearer. For specific implementation details of the above embodiments, please refer to the relevant content in 3GPP specification TS23.003, which will not be repeated here.

[0111] In step 504, a third RRC reconfiguration message sent by the network-side device is received, wherein the third RRC reconfiguration message includes a second DRB reconfigured by the network-side device for the UE.

[0112] In step 506, a second RRC reconfiguration complete message is sent to the network-side device.

[0113] For example, the UE can receive a third RRC reconfiguration message (i.e., an RRCConnection Reconfiguration message) sent by the network-side device. The third RRC reconfiguration message may include a second DRB (e.g., DRB ID3) reconfigured by the network-side device for the UE. In response to receiving the third RRC reconfiguration message, the UE can send a third RRC reconfiguration completion message (i.e., an RRC Connection ReconfigurationComplete message) to the network-side device.

[0114] In step 508, the network-side device sends an Activate Default EPS Bearer Context Request message.

[0115] In step 510, after sending an Activate Default EPS Bearer Context Accept Message to the network-side device, the IMS default bearer is re-established in the second communication system.

[0116] For example, after sending a third RRC reconfiguration completion message to the network-side device, the UE can receive an Activate Default EPS Bearer Context Request message (i.e., an ACTIVATE DEFAULT EPS BEARERCONTEXT REQUEST message) sent by the network-side device; in response to receiving the Activate Default EPS Bearer Context Request message, the UE can send an Activate Default EPS Bearer Context Accept message (i.e., an ACTIVATE DEFAULT EPSBEARER CONTEXT ACCEPT message) to the network-side device to indicate that the IMS default bearer has been re-established in the 4G communication system based on the second DRB.

[0117] Optionally, after step 510, the method may further include: performing IMS registration.

[0118] For example, after establishing the IMS default bearer, the UE can periodically send REGISTER messages to the network-side device to perform IMS registration; in response to receiving a 200 OK message from the network-side device, the IMS registration is completed.

[0119] As can be seen from the above embodiments, in response to the UE switching from a 5G communication system to a 4G communication system and completing the TAU process in the 4G communication system, if the UE determines that the first DRB configured for the UE by the network-side device has been lost, it can obtain the second DRB reconfigured for the UE by the network-side device. Therefore, in the event of an abnormal release of the DRB by the network side, after switching from a 5G communication system to a 4G communication system, the UE can immediately request the network-side device to re-establish the IMS default bearer, thereby promptly obtaining the second DRB reconfigured for the UE by the network-side device, enabling timely restoration of VoLTE service and ensuring the stability and reliability of VoLTE service.

[0120] Please see Figure 6 , Figure 6 This is a signaling interaction diagram illustrating a data radio bearer configuration method according to an embodiment of the present disclosure. Figure 6 As shown, the method can be applied to the UE; taking the UE switching from a 4G communication system to a 5G communication system as an example, the UE and the network-side device (RADIO NETWORK) can perform the following signaling interaction process to implement the data radio bearer configuration method.

[0121] The UE can send an ATTACH REQUEST message to the network-side device to request network attachment, which may include a PDN CONNECTIVITY REQUEST message to request the establishment of a default data bearer; wherein, the APN parameter carried in the PDNCONNECTIVITY REQUEST message can be the default APN parameter for the data service corresponding to each operator, such as cmnet, 3gnet, ctnet, etc.

[0122] The UE can receive an RRC Connection Reconfiguration message sent by the network-side device; this message may include the EBI 5 corresponding to the data service configured by the network-side device for the UE, and the DRB ID1 corresponding to the default data bearer.

[0123] The UE can send an RRC Connection Reconfiguration Complete message to the network-side device;

[0124] The UE can receive the ATTACH ACCEPT message sent by the network-side device;

[0125] The UE can receive the ACTIVATE DEFAULT EPS BEARER CONTEXTREQUEST message sent by the network-side device, which is used to activate the PDN connection corresponding to the data service for the UE;

[0126] The UE can send an ACTIVATE DEFAULT EPS BEARER CONTEXTACCEPT message to the network-side device to complete the establishment of a default data bearer in the 4G communication system.

[0127] The UE can send an ATTACH COMPLETE message to the network-side device to complete the initial attachment process in the 4G communication system.

[0128] The UE can send a PDNCONNECTIVITY REQUEST message to the network-side device to request the establishment of an IMS default bearer; wherein, the APN parameter carried in the PDN CONNECTIVITY REQUEST message can be "ims";

[0129] The UE can receive an RRC Connection Reconfiguration message sent by the network-side device; which may include the EBI 6 corresponding to the IMS service configured by the network-side device for the UE, and the DRB ID2 corresponding to the IMS default bearer;

[0130] The UE can send an RRC Connection Reconfiguration Complete message to the network-side device;

[0131] The UE can receive the ACTIVATE DEFAULT EPS BEARER CONTEXTREQUEST message sent by the network-side device, which is used to activate the PDN connection corresponding to the IMS service for the UE;

[0132] The UE can send an ACTIVATE DEFAULT EPS BEARER CONTEXTACCEPT message to the network-side device to complete the establishment of the IMS default bearer in the 4G communication system;

[0133] The UE can switch from the 4G communication system to the 5G communication system through any of the following methods: network redirection / switching / reselection;

[0134] The UE can send a REGISTRATION REQUEST message to the network-side device;

[0135] The UE can receive an RRC Reconfiguration message sent by the network-side device; this message may include PSI 1 for the data service configured by the network-side device for the UE, PSI 2 for the IMS service, and DRB ID1 for the default data bearer; it should be noted that EBI 5 and PSI 1, and EBI 6 and PSI 2 are in one-to-one correspondence.

[0136] The UE can send an RRC Reconfiguration Complete message to the network-side device;

[0137] The UE can receive the REGISTRATION ACCEPT message returned by the network-side device. It should be noted that the REGISTRATION ACCEPT message still indicates that PSI 1 corresponding to the data service and PSI 2 corresponding to the IMS service are both active. However, since the DRB ID2 corresponding to the IMS default bearer has been abnormally released by the RRCReconfiguration message, the IMS default bearer can no longer provide VoLTE service in the 5G communication system after the handover.

[0138] The UE can send a REGISTRATION COMPLETE message to the network-side device to complete the mobility registration update process in the 5G system;

[0139] Since the UE can determine that the DRB ID2 corresponding to the IMS default bearer is lost, the UE can send a PDU SESSION ESTABLISHMENT REQUEST message to the network-side device to request the re-establishment of the IMS default bearer; wherein, the PDU SESSION ESTABLISHMENT REQUEST message may include request parameters for the P-CSCF address;

[0140] The UE can receive an RRC Reconfiguration message returned by the network-side device, which may include the PSI 3 corresponding to the IMS service reconfigured by the network-side device for the UE, and the DRBID3 corresponding to the IMS default bearer;

[0141] The UE can send an RRC Reconfiguration Complete message to the network-side device;

[0142] The UE can receive a PDU SESSION ESTABLISHMENT ACCEPT message returned by the network-side device, which may include a DNN parameter of "ims" to indicate the completion of re-establishing the IMS default bearer in the 5G communication system;

[0143] The UE can send a REGISTER message to the network-side device to re-perform IMS registration;

[0144] The UE can receive a 200 OK message returned by the network-side device and complete the re-registration of IMS in the 5G communication system.

[0145] Please see Figure 7 , Figure 7 This is a signaling interaction diagram illustrating another data radio bearer configuration method according to embodiments of the present disclosure. Figure 7 As shown, the method can be applied to the UE; taking the UE switching from a 5G communication system to a 4G communication system as an example, the UE and the network-side device (RADIO NETWORK) can perform the following signaling interaction process to implement the data radio bearer configuration method.

[0146] The UE can send a PDU SESSIONESTABLISHMENT REQUEST message to the network-side device to request the establishment of a default data bearer;

[0147] The UE can receive an RRC Reconfiguration message sent by the network-side device; this message may include PSI 1 corresponding to the data service configured by the network-side device for the UE, and DRBID1 corresponding to the default data bearer;

[0148] The UE can send an RRC Reconfiguration Complete message to the network-side device;

[0149] The UE can receive the PDU SESSION ESTABLISHMENT ACCEPT message sent by the network-side device to complete the establishment of a default data bearer in the 5G communication system; the DNN parameters may include the default DNN parameters corresponding to each operator, such as cmnet, 3gnet, ctnet, etc.

[0150] The UE can send a PDU SESSIONESTABLISHMENT REQUEST message to the network-side device to request the establishment of an IMS default bearer;

[0151] The UE can receive an RRC Reconfiguration message sent by the network-side device; which may include the PSI 2 corresponding to the IMS service configured by the network-side device for the UE, and the DRBID2 corresponding to the IMS default bearer;

[0152] The UE can send an RRC Reconfiguration Complete message to the network-side device;

[0153] The UE can receive the PDU SESSION ESTABLISHMENT ACCEPT message sent by the network-side device to complete the establishment of the IMS default bearer in the 5G communication system; this can include a DNN parameter of "ims";

[0154] The UE can switch from the 4G communication system to the 5G communication system through any of the following methods: network redirection / switching / reselection;

[0155] The UE can send a TRACKING AREA UPDATE REQUEST message to the network-side device;

[0156] The UE can receive an RRC Connection Reconfiguration message sent by the network-side device; which may include EBI 5 for data services, EBI6 for IMS services, and DRB ID1 for the default data bearer configured by the network-side device for the UE.

[0157] The UE can send an RRC Connection Reconfiguration Complete message to the network-side device;

[0158] The UE can receive the TRACKING AREA UPDATE ACCEPT message returned by the network-side device. It should be noted that the REGISTRATION ACCEPT message still indicates that both EBI 5 corresponding to the data service and EBI 6 corresponding to the IMS service are active. However, since the DRB ID2 corresponding to the IMS default bearer has been abnormally released by the RRCConnection Reconfiguration message, the IMS default bearer can no longer provide VoLTE service in the switched 4G communication system.

[0159] The UE can send a TRACKING AREA UPDATE COMPLETE message to the network-side device, thus completing the TAU process in the 4G system;

[0160] Since the UE can determine that the DRB ID2 corresponding to the IMS default bearer is lost, the UE can send a PDN CONNECTIVITY REQUEST message to the network-side device to request the re-establishment of the IMS default bearer; wherein, the PDN CONNECTIVITY REQUEST message may include an APN parameter of "ims";

[0161] The UE can receive an RRC Connection Reconfiguration message returned by the network-side device, which may include the EBI7 corresponding to the IMS service reconfigured by the network-side device for the UE, and the DRB ID3 corresponding to the IMS default bearer;

[0162] The UE can send an RRC Connection Reconfiguration Complete message to the network-side device;

[0163] The UE can receive the ACTIVATE DEFAULT EPS BEARER CONTEXTREQUEST message sent by the network-side device, which is used to activate the PDN connection corresponding to the IMS service for the UE;

[0164] The UE can send an ACTIVATE DEFAULT EPS BEARER CONTEXTACCEPT message to the network-side device to re-establish the IMS default bearer in the 4G system;

[0165] The UE can send a REGISTER message to the network-side device to re-perform IMS registration;

[0166] The UE can receive a 200 OK message returned by the network-side device and complete the re-registration of IMS in the 4G communication system.

[0167] Regarding the above, as follows Figure 6 , Figure 7 For any aspects not described in detail in the illustrated embodiments, please refer to other embodiments shown in this disclosure, which will not be repeated here.

[0168] Corresponding to the aforementioned embodiments of the data radio bearer configuration method, this disclosure also provides embodiments of the data radio bearer configuration apparatus.

[0169] Please see Figure 8 , Figure 8 This is a schematic block diagram illustrating a data radio bearer configuration apparatus according to embodiments of the present disclosure. Figure 8 As shown, the device may include:

[0170] The determination module 802 is configured to determine, in response to the UE switching from a first communication system to a second communication system and completing a target update process in the second communication system, that the first data radio bearer (DRB) configured for the UE by the network-side device has been lost; wherein the target update process includes the update process of the UE registering with the second communication system; the first DRB includes the DRB corresponding to the IMS default bearer already established in the first communication system;

[0171] The first acquisition module 804 is used to acquire the second DRB reconfigured by the network-side device for the UE; wherein the second DRB is used to re-establish the IMS default bearer in the second communication system.

[0172] Please see Figure 9 , Figure 9 This is a schematic block diagram illustrating another data radio bearer configuration apparatus according to embodiments of the present disclosure. Figure 9 As shown, the device may further include:

[0173] The second acquisition module 902 is used to acquire the first DRB configured by the network-side device for the UE.

[0174] Please see Figure 10 , Figure 10 This is a schematic block diagram illustrating another data radio bearer configuration apparatus according to embodiments of the present disclosure. Figure 10 As shown, the device may further include:

[0175] The receiving module 1002 is configured to receive a first Radio Resource Control (RRC) reconfiguration message sent by the network-side device; the first RRC reconfiguration message includes at least one DRB configured by the network-side device for the UE;

[0176] Optionally, the determining module 802 may include:

[0177] A determination submodule is configured to determine, in response to determining that the first DRB configured by the network-side device for the UE is lost, the first DRB is lost if the at least one DRB is not included.

[0178] Please see Figure 11 , Figure 11 This is a schematic block diagram illustrating another data radio bearer configuration apparatus according to embodiments of the present disclosure. Figure 11 As shown, the first communication system includes a 4G communication system, the second communication system includes a 5G communication system, and the target update process is a mobility registration update process; the first acquisition module 804 may include:

[0179] The first sending submodule 1102 is used to send a Protocol Data Unit (PDU) session establishment request message to the network-side device for requesting the establishment of an IMS default bearer;

[0180] The first receiving submodule 1104 is used to receive a second RRC reconfiguration message sent by the network-side device, wherein the second RRC reconfiguration message includes a second DRB reconfigured by the network-side device for the UE.

[0181] The second sending submodule 1106 is used to send a second RRC reconfiguration completion message to the network-side device;

[0182] The second receiving submodule 1108 is used to re-establish the IMS default bearer in the second communication system after receiving the PDU session establishment accept message sent by the network-side device.

[0183] Optionally, the PDU session establishment request message includes a request parameter for the Proxy Call Session Control Function (P-CSCF) address, which is used to indicate to the network-side device that a request is made to establish an IMS default bearer; the PDU session establishment acceptance message includes a Data Network Name (DNN) parameter, which is used to indicate that the establishment of the IMS default bearer is complete.

[0184] Please see Figure 12 , Figure 12 This is a schematic block diagram illustrating another data radio bearer configuration apparatus according to embodiments of the present disclosure. Figure 12 As shown, the first communication system includes a 5G communication system, the second communication system includes a 4G communication system, and the target update process is a tracking area update (TAU) process; the first acquisition module 804 includes:

[0185] The third sending submodule 1202 is used to send a packet data network (PDN) connection request message to the network-side device to request the establishment of the IMS default bearer;

[0186] The third receiving submodule 1204 is used to receive a third RRC reconfiguration message sent by the network-side device, wherein the third RRC reconfiguration message includes a second DRB reconfigured by the network-side device for the UE;

[0187] The fourth sending submodule 1206 is used to send a second RRC reconfiguration complete message to the network-side device;

[0188] The fourth receiving submodule 1208 is used to receive the Activate Default Evolution Packet System EPS Bearer Context Request message sent by the network-side device;

[0189] The fifth sending submodule 1210 is used to re-establish the IMS default bearer in the second communication system after sending an activation default EPS bearer context accept message to the network-side device.

[0190] Optionally, the PDN connection request message includes an Access Point Name (APN) parameter, which is used to indicate a request to establish an IMS default bearer.

[0191] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments of the relevant methods, and will not be elaborated upon here.

[0192] For the device embodiments, since they basically correspond to the method embodiments, the relevant parts can be referred to in the description of the method embodiments. The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this disclosure according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0193] Accordingly, this disclosure also provides a user equipment, including:

[0194] processor;

[0195] Memory used to store processor-executable instructions;

[0196] The processor is used to implement the above-described data wireless bearer configuration method.

[0197] Accordingly, this disclosure also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described data wireless bearer configuration method.

[0198] like Figure 13 As shown, Figure 13 This is a schematic block diagram illustrating a data wireless bearer configuration device 1300 according to embodiments of the present disclosure. For example, device 1300 may be a mobile phone, computer, digital broadcasting terminal, messaging transceiver, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0199] Reference Figure 13The device 1300 may include one or more of the following components: a processing component 1302, a memory 1304, a power supply component 1306, a multimedia component 1308, an audio component 1310, an input / output (I / O) interface 1312, a sensor component 1314, and a communication component 1316.

[0200] Processing component 1302 typically controls the overall operation of device 1300, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1302 may include one or more processors 1320 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 1302 may include one or more modules to facilitate interaction between processing component 1302 and other components. For example, processing component 1302 may include a multimedia module to facilitate interaction between multimedia component 1308 and processing component 1302.

[0201] Memory 1304 is configured to store various types of data to support the operation of device 1300. Examples of such data include instructions for any application or method operating on device 1300, contact data, phonebook data, messages, pictures, videos, etc. Memory 1304 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0202] Power supply component 1306 provides power to various components of device 1300. Power supply component 1306 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 1300.

[0203] Multimedia component 1308 includes a screen that provides an output interface between the device 1300 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 1308 includes a front-facing camera and / or a rear-facing camera. When the device 1300 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0204] Audio component 1310 is configured to output and / or input audio signals. For example, audio component 1310 includes a microphone (MIC) configured to receive external audio signals when device 1300 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1304 or transmitted via communication component 1316. In some embodiments, audio component 1310 also includes a speaker for outputting audio signals.

[0205] I / O interface 1312 provides an interface between processing component 1302 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0206] Sensor assembly 1314 includes one or more sensors for providing status assessments of various aspects of device 1300. For example, sensor assembly 1314 may detect the on / off state of device 1300, the relative positioning of components such as the display and keypad of device 1300, changes in the position of device 1300 or a component of device 1300, the presence or absence of user contact with device 1300, the orientation or acceleration / deceleration of device 1300, and temperature changes of device 1300. Sensor assembly 1314 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1314 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 1314 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0207] Communication component 1316 is configured to facilitate wired or wireless communication between device 1300 and other devices. Device 1300 can access wireless networks based on communication standards, such as WiFi, 2G or 3G, 4G LTE, 5G NR, or combinations thereof. In one exemplary embodiment, communication component 1316 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1316 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0208] In an exemplary embodiment, the apparatus 1300 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described in any of the above embodiments.

[0209] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 1304 including instructions, which can be executed by a processor 1320 of the device 1300 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0210] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0211] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

[0212] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0213] The methods and apparatus provided in the embodiments of this disclosure have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A method for configuring a data wireless bearer, characterized in that, Applied to a user equipment (UE), the method includes: In response to the UE switching from a first communication system to a second communication system and completing a target update process in the second communication system, it is determined that the first data radio bearer (DRB) configured for the UE by the network-side device has been lost; wherein, the target update process includes the update process of the UE registering with the second communication system; the first DRB includes the DRB corresponding to the IMS default bearer already established in the first communication system; The second DRB reconfigured by the network-side device for the UE is obtained; wherein the second DRB is used to re-establish the IMS default bearer in the second communication system; wherein the second DRB is obtained based on a Protocol Data Unit (PDU) session establishment request message sent by the UE to the network-side device to request the establishment of the IMS default bearer, or based on a Packet Data Network (PDN) connection request message sent by the UE to the network-side device to request the establishment of the IMS default bearer; wherein the PDU session establishment request message includes a request parameter for the Proxy Call Session Control Function (P-CSCF) address, the request parameter for the P-CSCF address being used to indicate to the network-side device that the IMS default bearer is requested to be established; wherein the PDN connection request message includes an Access Point Name (APN) parameter, the APN parameter being used to indicate that the IMS default bearer is requested to be established. Before completing the target update process, the method further includes: The network-side device receives a first Radio Resource Control (RRC) reconfiguration message; the first RRC reconfiguration message includes at least one DRB configured by the network-side device for the UE. The determination that the first DRB configured for the UE by the network-side device has been lost includes: In response to determining that the first DRB is not included in the at least one DRB, it is determined that the first DRB configured by the network-side device for the UE is lost.

2. The method according to claim 1, characterized in that, Before the switch from the first communication system to the second communication system, the method further includes: Obtain the first DRB configured by the network-side device for the UE.

3. The method according to claim 1, characterized in that, The first communication system includes a 4G communication system, the second communication system includes a 5G communication system, and the target update process is a mobility registration update process; The step of obtaining the second DRB reconfigured for the UE by the network-side device includes: Send the PDU session establishment request message to the network-side device; The network-side device receives a second RRC reconfiguration message, which includes a second DRB reconfigured by the network-side device for the UE. Send a second RRC reconfiguration complete message to the network-side device; After receiving the PDU session establishment accept message sent by the network-side device, the IMS default bearer is re-established in the second communication system.

4. The method according to claim 3, characterized in that, The PDU session establishment acceptance message includes a data network name (DNN) parameter, which indicates the completion of IMS default bearer establishment.

5. The method according to claim 1, characterized in that, The first communication system includes a 5G communication system, the second communication system includes a 4G communication system, and the target update process is a tracking area update (TAU) process. The step of obtaining the second DRB reconfigured for the UE by the network-side device includes: Send the PDN connection request message to the network-side device; The network-side device receives a third RRC reconfiguration message, which includes a second DRB reconfigured by the network-side device for the UE. Send a second RRC reconfiguration complete message to the network-side device; Receive the Activate Default Evolution Packet System EPS Bearer Context Request message sent by the network-side device; After sending an Activate Default EPS Bearer Context Accept message to the network-side device, the IMS default bearer is re-established in the second communication system.

6. A data wireless bearer configuration device, characterized in that, The device includes: A determination module is configured to determine, in response to a UE switching from a first communication system to a second communication system and completing a target update process in the second communication system, that the first data radio bearer (DRB) configured for the UE by the network-side device has been lost; wherein the target update process includes the UE's registration update process with the second communication system; and the first DRB includes the DRB corresponding to the IMS default bearer already established in the first communication system. The first acquisition module is used to acquire the second DRB reconfigured by the network-side device for the UE; wherein the second DRB is used to re-establish the IMS default bearer in the second communication system; wherein the second DRB is obtained based on a Protocol Data Unit (PDU) session establishment request message sent by the UE to the network-side device to request the establishment of the IMS default bearer, or based on a Packet Data Network (PDN) connection request message sent by the UE to the network-side device to request the establishment of the IMS default bearer; wherein the PDU session establishment request message includes a request parameter for the Proxy Call Session Control Function (P-CSCF) address, the request parameter for the P-CSCF address being used to indicate to the network-side device that the request is to establish the IMS default bearer; wherein the PDN connection request message includes an Access Point Name (APN) parameter, the APN parameter being used to indicate that the request is to establish the IMS default bearer. The device further includes: The receiving module is configured to receive a first Radio Resource Control (RRC) reconfiguration message sent by the network-side device; the first RRC reconfiguration message includes at least one DRB configured by the network-side device for the UE; The determining module includes: A determination submodule is configured to determine, in response to determining that the first DRB configured by the network-side device for the UE is lost, the first DRB is lost if the at least one DRB is not included.

7. The apparatus according to claim 6, characterized in that, The device further includes: The second acquisition module is used to acquire the first DRB configured by the network-side device for the UE.

8. The apparatus according to claim 6, characterized in that, The first communication system includes a 4G communication system, the second communication system includes a 5G communication system, and the target update process is a mobility registration update process; The first acquisition module includes: The first sending submodule is used to send the PDU session establishment request message to the network-side device; The first receiving submodule is configured to receive a second RRC reconfiguration message sent by the network-side device, wherein the second RRC reconfiguration message includes a second DRB reconfigured by the network-side device for the UE. The second sending submodule is used to send a second RRC reconfiguration completion message to the network-side device; The second receiving submodule is used to re-establish the IMS default bearer in the second communication system after receiving the PDU session establishment accept message sent by the network-side device.

9. The apparatus according to claim 8, characterized in that, The PDU session establishment acceptance message includes a data network name (DNN) parameter, which indicates the completion of IMS default bearer establishment.

10. The apparatus according to claim 6, characterized in that, The first communication system includes a 5G communication system, the second communication system includes a 4G communication system, and the target update process is a tracking area update (TAU) process. The first acquisition module includes: The third sending submodule is used to send the PDN connection request message to the network-side device; The third receiving submodule is used to receive a third RRC reconfiguration message sent by the network-side device, wherein the third RRC reconfiguration message includes a second DRB reconfigured by the network-side device for the UE; The fourth sending submodule is used to send a second RRC reconfiguration complete message to the network-side device; The fourth receiving submodule is used to receive the Activate Default Evolution Packet System EPS Bearer Context Request message sent by the network-side device; The fifth sending submodule is used to re-establish the IMS default bearer in the second communication system after sending an activation default EPS bearer context accept message to the network-side device.

11. A user equipment, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is used to implement the method according to any one of claims 1 to 5.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the method of any one of claims 1 to 5.

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