Communication method and related equipment
By introducing dual access procedures triggered by application function network elements in 5G networks, the problem of the lack of dual access support in the 3GPP standard has been solved, enabling better traffic redirection and switching functions, and improving application performance and user experience.
Patent Information
- Application Number
- CN202410578845.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-11-11
AI Technical Summary
The existing 3GPP standards fail to support application function network elements triggering dual access procedures, resulting in insufficient traffic redirection and switching functions in 5G networks, which affects application performance and user experience.
By sending dual access related information to the policy control function network element through the application function network element, the dual access process is triggered. The policy control function network element then re-formulates the relevant policies and notifies the radio access network equipment and terminal equipment to perform dual access operations, ensuring that the terminal equipment can access two networks simultaneously.
It enables flexible triggering of dual access processes in different scenarios, improves data transmission quality and traffic redirection capabilities, thereby enhancing application performance and user experience.
Smart Images
Figure CN120935547A_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of mobile communication technology, and more specifically, to a communication method, application function network element, policy control function network element, wireless access network equipment, terminal equipment, electronic equipment, computer-readable storage medium, and computer program product. Background Technology
[0002] Dual access refers to the transmission of user data from a terminal device across two access networks, such as across two 3GPP 5G access networks (i.e., radio access networks defined by 3GPP standards in a 5G network). This dual access technology can enhance the traffic redirection and switching capabilities in a 5G network.
[0003] Different application function (AF) network elements have different requirements for traffic redirection and switching, but the current 3GPP standard does not support AF-triggered dual access procedures, resulting in a decline in application performance and user experience.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention
[0005] This disclosure provides a communication method, an application function network element, a policy control function network element, a wireless access network device, a terminal device, an electronic device, a computer-readable storage medium, and a computer program product to overcome or at least partially solve the above-mentioned problems.
[0006] Other features and advantages of this disclosure will become apparent from the following detailed description, or may be learned in part from practice of this disclosure.
[0007] According to one aspect of this disclosure, a communication method is provided, executed by an application function network element, the method comprising: sending dual access related information to a policy control function network element; the dual access related information being used to instruct the policy control function network element to trigger a dual access procedure.
[0008] In some embodiments of this disclosure, sending dual access related information to the policy control function network element includes: sending the dual access related information to the policy control function network element through the network open function network element.
[0009] According to another aspect of this disclosure, a communication method is provided, executed by a policy control function network element, the method comprising: receiving dual access related information sent by an application function network element; the dual access related information being used to indicate triggering a dual access procedure; and triggering the dual access procedure based on the dual access related information.
[0010] In some embodiments of this disclosure, triggering the dual access process based on the dual access related information includes: re-formulating the dual access related policy based on the dual access related information; sending the dual access related policy to the radio access network device; the dual access related policy is used to instruct the radio access network device to perform a dual access operation.
[0011] In some embodiments of this disclosure, the dual access related policy is used to instruct the wireless access network device to perform an operation to change the data transmission mode to dual access for the terminal device based on a first identifier of the terminal device; the first identifier is assigned to the terminal device by a first network to which the terminal device has already been connected.
[0012] In some embodiments of this disclosure, the dual access related policy is used to instruct the radio access network device to notify the terminal device to perform a dual access establishment operation, so that the terminal device can access the second network, obtain a second identifier allocated to the terminal device by the second network, register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0013] In some embodiments of this disclosure, sending the dual access related policy to the radio access network device includes: sending the dual access related policy to the radio access network device through an access and mobility management function network element.
[0014] According to another aspect of this disclosure, a communication method is provided, performed by a wireless access network device, the method comprising: receiving a dual access related policy sent by a policy control function network element; and sending a dual access operation execution message to a terminal device according to the dual access related policy; the dual access operation execution message being used to instruct the terminal device to perform a dual access operation.
[0015] In some embodiments of this disclosure, the dual access operation execution message is used to instruct the terminal device to change the data transmission mode corresponding to the first identifier of the terminal device to dual access; the first identifier is assigned to the terminal device by the first network to which the terminal device has already connected.
[0016] In some embodiments of this disclosure, the dual access operation execution message is used to instruct the terminal device to access the second network, obtain the second identifier assigned to the terminal device by the second network, register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0017] In some embodiments of this disclosure, the dual access related policy is re-formulated by the policy control function network element based on the dual access related information sent by the application function network element; the dual access related information is used to indicate the triggering of the dual access process.
[0018] According to another aspect of this disclosure, a communication method is provided, executed by a terminal device, the method comprising: receiving a dual access operation execution message sent by a wireless access network device; and executing a dual access operation according to the dual access operation execution message.
[0019] In some embodiments of this disclosure, performing the dual access operation according to the dual access operation execution message includes: changing the data transmission mode corresponding to the first identifier of the terminal device to dual access according to the dual access operation execution message; the first identifier is assigned to the terminal device by the first network that the terminal device has already accessed.
[0020] In some embodiments of this disclosure, performing the dual access operation according to the dual access operation execution message includes: accessing a second network according to the dual access operation execution message, obtaining a second identifier allocated by the second network to the terminal device; registering and establishing a session according to the second identifier, and setting the data transmission mode corresponding to the second identifier to dual access.
[0021] In some embodiments of this disclosure, the dual access operation execution message is sent by the radio access network device in response to a dual access related policy; the dual access related policy is reformulated by the policy control function network element based on dual access related information and sent to the radio access network device; the dual access related information is sent by the application function network element to the policy control function network element to indicate the triggering of the dual access procedure.
[0022] According to another aspect of this disclosure, an application function network element is provided, including: an information sending unit, configured to send dual access related information to a policy control function network element; the dual access related information is used to instruct the policy control function network element to trigger a dual access procedure.
[0023] According to another aspect of this disclosure, a policy control function network element is provided, comprising: an information receiving unit for receiving dual access related information sent by an application function network element; the dual access related information is used to indicate triggering a dual access process; and a triggering unit for triggering the dual access process based on the dual access related information.
[0024] According to another aspect of this disclosure, a wireless access network device is provided, comprising: a policy receiving unit for receiving a dual access related policy sent by a policy control function network element; and an instruction sending unit for sending a dual access operation execution message to a terminal device according to the dual access related policy; wherein the dual access operation execution message is used to instruct the terminal device to perform a dual access operation.
[0025] According to another aspect of this disclosure, a terminal device is provided, comprising: an instruction receiving unit for receiving a dual access operation execution message sent by a wireless access network device; and an execution unit for executing a dual access operation according to the dual access operation execution message.
[0026] According to another aspect of this disclosure, an electronic device is provided, comprising: one or more processors; and a storage device configured to store one or more programs, which, when executed by the one or more processors, cause the one or more processors to implement the communication method as described in the above embodiments.
[0027] According to another aspect of this disclosure, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the communication method as described in the above embodiments.
[0028] According to another aspect of this disclosure, a computer program product is also provided, including a computer program that, when executed by a processor, implements the communication method as described in the above embodiments.
[0029] The communication method provided in this disclosure involves an application function network element sending dual access related information to a policy control function network element. This dual access related information is used to trigger a dual access process. Upon receiving the dual access related information, the policy control function network element triggers the dual access process. Therefore, supporting application function network elements to trigger dual access processes allows them to initiate such processes at different times and in different scenarios as needed. This enables application function network elements to better transmit data and obtain higher-quality traffic redirection and exchange functions, thereby improving application performance and user experience.
[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure, and are not intended to unduly limit this disclosure.
[0032] Figure 1A schematic diagram of a network architecture of a communication system to which embodiments of this disclosure apply is shown;
[0033] Figure 2 A flowchart of a communication method according to an embodiment of the present disclosure is shown;
[0034] Figure 3 A flowchart of a communication method according to yet another embodiment of this disclosure is shown;
[0035] Figure 4 A flowchart of a communication method according to yet another embodiment of this disclosure is shown;
[0036] Figure 5 A flowchart of a communication method according to yet another embodiment of this disclosure is shown;
[0037] Figure 6 An interaction diagram of a communication method according to an embodiment of the present disclosure is shown;
[0038] Figure 7 A schematic diagram of the structure of an AF network element according to an embodiment of the present disclosure is shown;
[0039] Figure 8 A schematic diagram of the structure of a PCF network element according to an embodiment of the present disclosure is shown;
[0040] Figure 9 A schematic diagram of the structure of a RAN device according to an embodiment of the present disclosure is shown;
[0041] Figure 10 A schematic diagram of the structure of a UE according to an embodiment of the present disclosure is shown;
[0042] Figure 11 A structural block diagram of an electronic device according to an embodiment of the present disclosure is shown. Detailed Implementation
[0043] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0044] Furthermore, the accompanying drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. Some block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.
[0045] It should be noted that the ordinal numbers such as "first" and "second" mentioned in the embodiments of this disclosure are used to distinguish multiple objects, and are not used to limit the order, timing, priority or importance of multiple objects. Furthermore, the descriptions of "first" and "second" do not limit the objects to necessarily being different.
[0046] The technical solutions of this disclosure can be applied to various communication systems, such as Global System of Mobile communication (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex systems, LTE Time Division Duplex systems, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication systems, 5G systems, or future evolved mobile communication systems, etc.
[0047] Figure 1 A schematic diagram of a network architecture for a communication system to which embodiments of this disclosure apply is shown. Figure 1As shown, the network architecture includes User Equipment (UE), Radio Access Network (RAN) equipment, Access and Mobility Management Function (AMF) network elements, Session Management Function (SMF) network elements, User Plane Function (UPF) network elements, Policy Control Function (PCF) network elements, Network Slice Selection Function (NSSF) network elements, Network Repository Function (NRF) network elements, Network Data Analytics Function (NWDAF) network elements, Unified Data Management (UDM) network elements, Unified Data Repository (UDR) network elements, Authentication Server Function (AUSF) network elements, Network Exposure Function (NEF) network elements, AF network elements, and a Data Network (DN) connecting to the operator's network.
[0048] The UE can be various electronic devices, deployed on land (including indoor or outdoor, handheld, wearable, or vehicle-mounted); on water (such as ships); or in the air (such as airplanes, balloons, and satellites). The UE can communicate with the core network without RAN equipment and exchange voice and / or data with RAN equipment.
[0049] RAN equipment is a device in the network used to connect UEs to the wireless network. It can include devices in the access network that communicate with wireless terminals through one or more sectors on the air interface. UEs can access AMF network elements through RAN equipment. Specifically, when a UE accesses an AMF network element through RAN equipment, the UE can access the AMF network element through network-side equipment such as 5G and later versions of base stations (e.g., 5G NR NB) or base stations in other communication systems (e.g., eNB base stations).
[0050] The AMF network element is mainly used for mobility management and access authentication / authorization of UEs, and is also responsible for transmitting user policies between UEs and PCF network elements.
[0051] SMF network elements are mainly used for session management, UE Internet Protocol address allocation and management, selection of manageable user plane functions, policy control, or terminal points for charging function interfaces, and downlink data notification, etc.
[0052] UPF network elements can be used for packet routing and forwarding, or QoS processing of user plane data. User data can be accessed to the DN through this network element.
[0053] PCF network elements are a unified policy framework used to guide network behavior, providing policy rule information for control plane functional network elements (such as AMF and SMF network elements).
[0054] The NSSF network element is mainly used to select the appropriate network slice for the UE's services.
[0055] NRF network elements are primarily used to provide registration and discovery functions for network elements or the services they provide.
[0056] NWDAF network elements can collect data from various network functions and perform analysis and prediction.
[0057] UDM network elements are mainly used to manage UE subscription information. For example, during the authentication process, they perform authentication vector calculation, key deduction, user identifier decryption, etc. In the resynchronization process, they verify AUTS according to the corresponding algorithm and initiate a re-authentication process.
[0058] UDR network elements are mainly used to store structured data information, including subscription information, policy information, and network data or service data with standard format definitions.
[0059] The AUSF network element is mainly used for security authentication of terminal devices.
[0060] The NEF network element is located between the 5G core network and external third-party application functions, and may also have some internal application functions. It is responsible for managing the network data that is open to the outside world. All external applications that want to access the internal data of the 5G core network must go through the NEF network element.
[0061] AF network elements are mainly used to convey the application side's requirements to the network side, such as QoS requirements and user status event subscriptions.
[0062] It should be understood that the aforementioned network elements or functions can be network components in hardware devices, software functions running on dedicated hardware, or virtualization functions instantiated on a platform (e.g., a cloud platform).
[0063] It should be understood that the naming in the embodiments of this disclosure is defined only for the convenience of distinguishing different functions and should not constitute any limitation on this disclosure. This disclosure does not preclude the possibility of using other naming in 5G networks and other future networks. For example, in 6G networks, some or all of the above-mentioned network elements may use the terminology from 5G, or may use other names, etc. In addition, the names of the messages (or signaling) transmitted between the above-mentioned network elements are merely examples and do not constitute any limitation on the function of the messages themselves.
[0064] It should be understood that the network architecture described above for the embodiments of this disclosure is merely an example, and the network architecture applicable to the embodiments of this disclosure is not limited thereto. Any network architecture capable of implementing the functions of the above-described network elements is applicable to the embodiments of this disclosure.
[0065] The network architecture and business scenarios described in this disclosure are intended to more clearly illustrate the technical solutions of this disclosure and do not constitute a limitation on the technical solutions provided in this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in this disclosure are also applicable to similar technical problems.
[0066] Figure 2 A flowchart of a communication method according to an embodiment of the present disclosure is shown. Figure 2 The communication method provided in the embodiment can be executed by the AF network element. For example... Figure 2 As shown, the communication method specifically includes the following steps.
[0067] Step S210: Send dual access related information to the PCF network element; wherein, the dual access related information is used to instruct the PCF network element to trigger the dual access procedure.
[0068] The AF network element can send dual access related information to the PCF network element according to the needs (different time / scenario, etc.). After receiving the dual access related information, the PCF network element will trigger the dual access procedure to ensure that the UE can access two or more access networks.
[0069] In this embodiment of the disclosure, the AF network element may determine that a dual access process needs to be triggered based on the following requirements.
[0070] Example 1, Load balancing requirement: If the current access network is overloaded, the AF network element can trigger a dual access process to distribute the user data traffic of the terminal device to the two networks by accessing two networks, so as to achieve load balancing and improve the overall performance and stability of the network.
[0071] Example 2, High Reliability Requirements: For application scenarios requiring high reliability, the AF (Automatic Access) element may determine that transmitting data in a single access network poses a risk. Therefore, the AF element can trigger a dual access process, connecting to two networks to ensure reliable data transmission and backup.
[0072] Example 3, Low Latency Requirements: For applications with high real-time requirements, such as high-definition video calls, the AF (Active Front-End) network element can determine that low latency requirements may not be met in a single access network. Therefore, the AF network element can trigger a dual access process, reducing data transmission latency by accessing two networks.
[0073] Example 4: Multi-service parallel requirements: In some scenarios, users may need to handle multiple different services simultaneously, which may have different requirements for bandwidth, latency, etc. To meet these requirements, the AF network element can trigger a dual access process, directing different service data traffic to different access networks to achieve better service performance.
[0074] Example 5: Temporary Capacity Increase Requirement: During specific times or events (such as holidays, promotional activities, etc.), network traffic may increase significantly. To meet this temporary capacity increase requirement, the AF network element can trigger a dual access procedure, redirecting some data traffic to another access network to alleviate the pressure on the current network.
[0075] It should be noted that the above are some examples of practical requirements that may trigger the dual access process. In actual applications, AF network elements can flexibly trigger the dual access process according to specific business scenarios and requirements.
[0076] In some embodiments of this disclosure, the dual access related information includes a dual access trigger identifier. The dual access trigger identifier is used to request the triggering of the dual access procedure. After receiving the dual access related information carrying the dual access trigger identifier, the PCF network element parses the dual access related information to obtain the dual access trigger identifier, and then triggers the dual access procedure based on the dual access trigger identifier.
[0077] In some embodiments of this disclosure, the dual access related information also includes: UE identifier, access type identifier, service / application identifier, access parameters, and access time.
[0078] In this context, UE identifier refers to the unique identifier of the UE that needs to execute the dual access procedure, such as the International Mobile Subscriber Identity (IMSI) or the device number of the terminal equipment. Access type / identifier refers to the type of network to be accessed, such as a 3GPP 5G network. Service / application identifier identifies the specific service or application that triggers the dual access procedure. Access parameters refer to parameters related to dual access, such as data traffic allocation ratios and Quality of Service (QoS) requirements. Access time can be used to indicate the effective period of dual access-related information and to indicate whether the dual access procedure needs to be triggered at a specific time.
[0079] In addition to the parameters mentioned above, dual access related information may also include other parameters, such as authentication and authorization information, which is used to authenticate and authorize terminal devices and ensures the security of the dual access process. Other information may be related to specific application scenarios and requirements.
[0080] It should be noted that the specific content and format of dual access related information may vary depending on different network architectures, standards and service requirements, and this disclosure does not limit such variations.
[0081] In some embodiments of this disclosure, sending dual access related information to the PCF network element includes: sending dual access related information to the PCF network element through the NEF network element.
[0082] The AF network element determines that a dual access procedure needs to be triggered based on demand and sends the dual access related information to the NEF network element. After receiving the dual access related information, the NEF network element sends it to the PCF network element, which then triggers the dual access procedure upon receiving the information, ensuring that the terminal device can access two or more access networks.
[0083] In this embodiment of the disclosure, after receiving the dual access related information sent by the AF network element, the NEF network element can convert the dual access related information and send the converted dual access related information to the PCF network element so that the PCF network element can better understand and process it.
[0084] In this embodiment, the network already accessed by the UE is the first network. By triggering the dual access procedure, the new network accessed by the UE is the second network. The PCF network element is a network element in the first network that provides services to the UE.
[0085] The communication method provided in this disclosure involves an AF (Active Front-End) network element sending dual-access related information to a PCF (Public Front-End) network element. This dual-access related information is used to trigger a dual-access process. Upon receiving this information, the PCF network element triggers the dual-access process. Therefore, supporting AF network elements in triggering dual-access processes allows them to initiate such processes at different times and in different scenarios as needed. This enables AF network elements to better transmit data and achieve superior traffic redirection and switching capabilities, thereby improving application performance and user experience.
[0086] Figure 3 A flowchart of a communication method according to yet another embodiment of this disclosure is shown. Figure 3 The communication method provided in the embodiment can be executed by a PCF network element. For example... Figure 3 As shown, the communication method specifically includes the following steps.
[0087] Step S310: Receive dual access related information sent by the AF network element; wherein, the dual access related information is used to indicate the triggering of the dual access procedure.
[0088] Step S320: Trigger the dual access process based on dual access related information.
[0089] In some embodiments of this disclosure, the AF network element can send dual access-related information to the PCF network element based on needs (different times / scenarios, etc.) to determine that a dual access procedure needs to be triggered. Upon receiving the dual access-related information, the PCF network element triggers the dual access procedure to ensure that the terminal device can access two or more access networks. The AF network element can flexibly trigger the dual access procedure according to specific service scenarios and needs. Examples include load balancing requirements, high reliability requirements, low latency requirements, multi-service parallel requirements, and temporary capacity expansion requirements.
[0090] In some embodiments of this disclosure, the dual access related information includes a dual access trigger identifier. The dual access trigger identifier is used to request the triggering of the dual access procedure. After receiving the dual access related information carrying the dual access trigger identifier, the PCF network element parses the dual access related information to obtain the dual access trigger identifier, and then triggers the dual access procedure based on the dual access trigger identifier.
[0091] In some embodiments of this disclosure, the dual access related information also includes: UE identifier, access type identifier, service / application identifier, access parameters, and access time. These parameters have already been explained above and will not be repeated here.
[0092] In some embodiments of this disclosure, triggering a dual access process based on dual access-related information includes: re-formulating a dual access-related policy based on the dual access-related information; and sending the dual access-related policy to the RAN device; wherein the dual access-related policy is used to instruct the RAN device to perform a dual access operation.
[0093] After receiving dual access related information, the PCF network element re-executes the dual access related policy, and then sends the dual access related policy to the RAN device, so that the RAN device can perform dual access operation based on the dual access related policy after receiving it.
[0094] In some embodiments of this disclosure, a dual access related policy is used to instruct the RAN device to perform an operation to change the data transmission mode to dual access for the UE based on the UE's first identifier.
[0095] In this embodiment, the network already accessed by the UE is the first network. By triggering the dual access procedure, the new network accessed by the UE is the second network. The PCF network element is a network element in the first network that provides services to the UE, and the UE accesses the first network through the RAN device.
[0096] The UE's first identifier is assigned to the UE by the first network and can be the UE's first subscription permanent identifier (SUPI). The PCF network element sends the dual access related policy to the RAN device. After receiving the dual access related policy, the RAN device parses the policy to obtain the UE's first SUPI and notifies the UE to change the data transmission mode corresponding to the first SUPI to dual access. This notification can include sending specific signaling or messages to the UE, informing it to change the data transmission mode corresponding to the first SUPI to dual access.
[0097] In some embodiments of this disclosure, the dual access related policy is used to instruct the RAN device to notify the UE to perform the dual access establishment operation, so that the UE can access the second network, obtain the second identifier allocated to the UE by the second network, register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0098] In this embodiment of the disclosure, the second identifier of the UE is assigned to the UE by the second network, and may be the second SUPI of the UE.
[0099] The PCF network element sends the dual access related policy to the RAN device. After receiving the dual access related policy, the RAN device notifies the UE to perform the dual access establishment operation based on the dual access related policy. The notification method may include sending specific signaling or messages to the UE to inform the UE to establish dual access.
[0100] After receiving a notification from the RAN device, the UE accesses the second network and obtains a second SUPI allocated to it by the second network. The UE uses the second SUPI to register and establish a corresponding session in the second network, and sets the data transmission mode corresponding to the second SUPI to dual access.
[0101] In some embodiments of this disclosure, sending dual access related policies to the RAN device includes: sending dual access related policies to the RAN device through the AMF network element.
[0102] In this embodiment, the AMF network element is a network element in the first network that provides services to the UE. After re-formulating the dual access related policy, the PCF network element sends the dual access related policy to the AMF network element and notifies the RAN device of the dual access related policy, so that the RAN device performs dual access operation based on the dual access related policy.
[0103] The communication method provided in this disclosure involves the AF network element sending dual access related information to the PCF network element. Upon receiving this information, the PCF network element triggers a dual access procedure. Specifically, after receiving the AF information, the PCF network element re-formulates the dual access related policy and sends it to the RAN device via the AMF network element. This causes the RAN device to notify the UE to perform a dual access operation, changing the data transmission mode corresponding to the first identifier (i.e., the first network already accessed by the UE, assigned to the UE) to dual access, accessing the second network, registering and establishing a session based on the second identifier (i.e., the second network assigned to the UE), and setting the data transmission mode corresponding to the second identifier to dual access. Ultimately, the UE simultaneously accesses both the first and second networks, enabling data transmission using both networks. This allows the AF network element to better transmit data through the established dual access procedure, achieving superior traffic redirection and switching functions, thereby improving application performance and user experience.
[0104] Figure 4 A flowchart of a communication method according to yet another embodiment of this disclosure is shown. Figure 4 The communication method provided in this embodiment can be executed by a RAN device. For example... Figure 4 As shown, the communication method specifically includes the following steps.
[0105] Step S410: Receive the dual access related policy sent by the PCF network element.
[0106] In some embodiments of this disclosure, the dual access related strategy is redefined by the PCF network element based on the dual access related information sent by the AF network element; wherein, the dual access related information is used to indicate the triggering of the dual access procedure.
[0107] The AF network element can determine whether the dual access process needs to be triggered based on demand. It sends the dual access-related information to the PCF network element through the NEF network element. After receiving the dual access-related information, the PCF network element re-formulates the dual access-related policy and sends the dual access-related policy to the AMF network element. The AMF network element then notifies the RAN device of the dual access-related policy.
[0108] In this embodiment, the network already accessed by the UE is the first network. By triggering the dual access procedure, the new network accessed by the UE is the second network. Specifically, the PCF network element and the AMF network element are network elements in the first network that provide services to the UE. The UE accesses the first network through the RAN device.
[0109] Step S420: According to the dual access related policy, a dual access operation execution message is sent to the UE; wherein, the dual access operation execution message is used to instruct the UE to perform a dual access operation.
[0110] After receiving the dual access related policy, the RAN device sends a dual access operation execution message to the UE based on the dual access related policy, so that the UE can perform dual access operation. In the end, the UE can access the first network and the second network at the same time and use the two networks for data transmission.
[0111] In some embodiments of this disclosure, the dual access operation execution message is used to instruct the UE to change the data transmission mode corresponding to the UE's first identifier to dual access.
[0112] Here, the first identifier is assigned to the UE by the first network it accesses, and can be the first SUPI. The RAN device parses the dual access related policies to obtain the UE's first SUPI and sends a dual access operation execution message to the UE, which carries the UE's first SUPI. After receiving the dual access operation execution message, the UE changes the data transmission mode corresponding to the first SUPI to dual access according to the UE's first SUPI.
[0113] In some embodiments of this disclosure, the dual access operation execution message is used to instruct the UE to access the second network, obtain the second identifier assigned to the UE by the second network, register and establish a session based on the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0114] The second identifier is assigned to the UE by the second network and can be the second SUPI. After parsing the dual access related policies, the RAN device sends a dual access operation execution message to the UE, informing the UE to access the second network (the new network). After successfully accessing the second network, the UE obtains the second SUPI assigned by the second network, registers and establishes the corresponding session in the second network using the second SUPI, and sets the data transmission mode corresponding to the SUPI to dual access.
[0115] The communication method provided in this disclosure involves the RAN device receiving a dual-access related policy and notifying the UE to perform a dual-access operation. This involves changing the data transmission mode corresponding to the first identifier (i.e., the one assigned to the UE by the first network it has already accessed) to dual access, accessing the second network, registering and establishing a session based on the second identifier (i.e., the one assigned to the UE by the second network), and setting the data transmission mode corresponding to the second identifier to dual access. Ultimately, the UE simultaneously accesses both the first and second networks, enabling data transmission using both networks. This allows the AF network element to better transmit data through the established dual-access process, achieving superior traffic redirection and switching functions, thereby improving application performance and user experience.
[0116] Figure 5 A flowchart of a communication method according to yet another embodiment of this disclosure is shown. Figure 5 The communication method provided in this embodiment can be executed by a terminal device. For example... Figure 5 As shown, the communication method specifically includes the following steps.
[0117] Step S510: Receive the dual access operation execution message sent by the RAN device.
[0118] In some embodiments of this disclosure, the dual access operation execution message is sent by the RAN device in response to the dual access related policy; the dual access related policy is reformulated by the PCF network element based on the dual access related information and sent to the RAN device; the dual access related information is sent by the AF network element to the PCF network element to indicate the triggering of the dual access procedure.
[0119] The AF (Asynchronous Activated Front) network element can determine if a dual access procedure needs to be triggered and send the relevant information to the PCF (Programmable Activated Front) network element via the NEF (Neural Front) network element. Upon receiving this information, the PCF network element re-formulates the dual access policy and sends it to the AMF (Advanced Management Front) network element. The AMF network element then notifies the RAN (Radio Access Registry) device of the dual access policy. Upon receiving the dual access policy, the RAN device sends a dual access operation execution message to the UE (User Equipment).
[0120] In this embodiment, the network already accessed by the UE is the first network. By triggering the dual access procedure, the new network accessed by the UE is the second network. Specifically, the PCF network element and the AMF network element are network elements in the first network that provide services to the UE. The UE accesses the first network through the RAN device.
[0121] Step S520: Perform the dual access operation according to the dual access operation execution message.
[0122] In some embodiments of this disclosure, performing a dual access operation according to a dual access operation execution message includes: changing the data transmission mode corresponding to the first identifier of the UE to dual access according to the dual access operation execution message.
[0123] Here, the first identifier is assigned to the UE by the first network it accesses, and can be the first SUPI. The RAN device carries the UE's first SUPI in the dual access operation execution message sent to the UE. After receiving the dual access operation execution message, the UE changes the data transmission mode corresponding to the first SUPI to dual access based on the UE's first SUPI.
[0124] In some embodiments of this disclosure, performing a dual access operation according to a dual access operation execution message includes: accessing a second network according to the dual access operation execution message, obtaining a second identifier allocated to the UE by the second network; registering and establishing a session according to the second identifier, and setting the data transmission mode corresponding to the second identifier to dual access.
[0125] The second identifier is assigned to the UE by the second network and can be the second SUPI. After receiving the dual access operation execution message sent by the RAN device, the UE determines that it needs to access the second network based on the message. The UE initiates the access procedure to the second network (the new network). After successfully accessing the second network, the UE obtains the second SUPI assigned to it by the second network, uses the second SUPI to register and establish a corresponding session in the second network, and sets the data transmission mode corresponding to the second SUPI to dual access.
[0126] The communication method provided in this disclosure involves a UE performing a dual access operation based on a dual access operation execution message sent by the RAN device. This involves changing the data transmission mode corresponding to the first identifier (i.e., the one assigned to the UE by the first network it has already accessed) to dual access, accessing the second network, registering and establishing a session based on the second identifier (i.e., the one assigned to the UE by the second network), and setting the data transmission mode corresponding to the second identifier to dual access. Ultimately, the UE simultaneously accesses both the first and second networks, enabling data transmission using both networks. This allows the AF network element to better transmit data through the established dual access process, achieving superior traffic redirection and switching functions, thereby improving application performance and user experience.
[0127] The following specific embodiments illustrate the communication method provided in the embodiments of this disclosure.
[0128] Figure 6 An interaction diagram of a communication method according to an embodiment of the present disclosure is shown. Figure 6The interaction process between the UE, RAN1 device, AMF1 network element, PCF1 network element, NEF network element, and AF network element is illustrated. Specifically, the UE accesses the first network through the RAN1 device, and the AMF1 and PCF1 network elements are network elements that provide services to UEs outside the first network. Figure 6 As shown, the interaction process may include the following steps.
[0129] In step S601, the AF network element determines that the dual access process needs to be triggered based on the requirements and sends the dual access related information to the NEF network element.
[0130] The dual access related information is used to instruct the PCF1 network element to trigger the dual access procedure. This information may include a dual access trigger identifier, which is used to request the triggering of the dual access procedure.
[0131] Dual access related information may also include: UE identifier, access type identifier, service / application identifier, access parameters, access time, etc.
[0132] In step S602, after receiving the dual access related information, the NEF network element sends the dual access related information to the PCF1 network element to inform the PCF1 network element to trigger the dual access process.
[0133] In step S603, after receiving the dual access related information, the PCF1 network element re-formulates the dual access related strategy based on the received information.
[0134] In step S604, the PCF1 network element sends the dual access related policies to the AMF1 network element.
[0135] In step S605, after receiving the dual access related policy sent by the PCF1 network element, the AMF1 network element notifies the RNA1 device of the dual access related policy.
[0136] In step S606, the RAN1 device performs a change of the data transmission mode for the UE to dual access based on the UE's SUPI1.
[0137] In this context, UE's SUPI1 is the SUPI assigned to the UE by the first network. After receiving the dual access related policy, RAN1 sends a dual access operation execution message to the UE based on the policy, which carries the UE's SUPI1. Upon receiving the dual access operation execution message, the UE changes the corresponding data transmission mode to dual access according to SUPI1.
[0138] In step S607, the RAN1 device notifies the UE to perform the dual access establishment operation.
[0139] In step S608, the UE registers and establishes a session using SUPI2, wherein the data transmission mode is dual access.
[0140] The UE's SUPI2 is a SUPI assigned to the UE by the second network. After receiving the dual access operation execution message sent by the RAN1 device, the UE determines that it needs to access the second network based on the message. The UE initiates the access procedure to the second network (the new network). After successfully accessing the second network, the UE obtains the SUPI2 assigned to it by the second network, uses SUPI2 to register and establish the corresponding session in the second network, and sets the data transmission mode corresponding to SUPI2 to dual access.
[0141] The UE can access the second network through the RAN2 device. The network elements that provide services to the UE in the second network include the AMF2 network element and the PCF2 network element.
[0142] The communication method provided in this disclosure supports AF network elements triggering dual access procedures, enabling AF network elements to initiate dual access procedures at different times / scenarios as needed. As a result, AF network elements can better transmit data through the established dual access procedures, obtain better traffic redirection and exchange functions, thereby improving application performance and user experience.
[0143] Figure 7 A schematic diagram of the structure of an AF network element according to an embodiment of this disclosure is shown. Figure 7 As shown, the AF network element 700 includes an information transmission unit 710.
[0144] The information sending unit 710 is used to send dual access related information to the PCF network element; wherein, the dual access related information is used to instruct the PCF network element to trigger the dual access procedure.
[0145] In some embodiments of this disclosure, the information sending unit 710 is further configured to: send dual access related information to the PCF network element via the NEF network element.
[0146] Since the principle of solving the problem in this AF network element embodiment is similar to that in the above method embodiment, the implementation of this AF network element embodiment can be referred to in the implementation of the above method embodiment, and the repeated parts will not be described again.
[0147] Figure 8 A schematic diagram of the structure of a PCF network element according to an embodiment of this disclosure is shown. Figure 8 As shown, the PCF network element 800 includes an information receiving unit 810 and a triggering unit 820.
[0148] The information receiving unit 810 is used to: receive dual access related information sent by the AF network element; wherein, the dual access related information is used to indicate the triggering of the dual access procedure. The triggering unit 820 is used to: trigger the dual access procedure according to the dual access related information.
[0149] In some embodiments of this disclosure, the triggering unit 820 is further configured to: reformulate the dual access related policy based on dual access related information; and send the dual access related policy to the RAN device; wherein the dual access related policy is used to instruct the RAN device to perform a dual access operation.
[0150] In some embodiments of this disclosure, a dual access related policy is used to instruct the RAN device to perform an operation to change the data transmission mode to dual access for the UE based on the UE's first identifier; wherein, the first identifier is assigned to the UE by the first network to which the UE has already accessed.
[0151] In some embodiments of this disclosure, the dual access related policy is used to instruct the RAN device to notify the UE to perform the dual access establishment operation, so that the UE can access the second network, obtain the second identifier allocated to the UE by the second network, register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0152] In some embodiments of this disclosure, the triggering unit 820 is also configured to: send dual access related policies to the RAN device through the AMF network element.
[0153] Since the principle of solving the problem in this PCF network element embodiment is similar to that in the above method embodiment, the implementation of this PCF network element embodiment can be referred to in the implementation of the above method embodiment, and the repeated parts will not be described again.
[0154] Figure 9 A schematic diagram of the structure of a RAN device according to an embodiment of this disclosure is shown. Figure 9 As shown, the RAN device 900 includes a policy receiving unit 910 and an instruction sending unit 920.
[0155] The policy receiving unit 910 is used to: receive dual access related policies sent by the PCF network element;
[0156] The instruction sending unit 920 is used to: send a dual access operation execution message to the UE according to the dual access related policy; wherein the dual access operation execution message is used to instruct the UE to perform a dual access operation.
[0157] In some embodiments of this disclosure, the dual access operation execution message is used to instruct the UE to change the data transmission mode corresponding to the UE's first identifier to dual access; the first identifier is assigned to the UE by the first network to which the UE has already accessed.
[0158] In some embodiments of this disclosure, the dual access operation execution message is used to instruct the UE to access the second network, obtain the second identifier assigned to the UE by the second network, register and establish a session based on the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0159] In some embodiments of this disclosure, the dual access related strategy is redefined by the PCF network element based on the dual access related information sent by the AF network element; the dual access related information is used to indicate the triggering of the dual access procedure.
[0160] Since the principle of solving the problem in this RAN device embodiment is similar to that in the above method embodiment, the implementation of this RAN device embodiment can be referred to in the above method embodiment, and repeated parts will not be described again.
[0161] Figure 10 A schematic diagram of the structure of a UE according to an embodiment of this disclosure is shown. Figure 10 As shown, UE 1000 includes an instruction receiving unit 1010 and an execution unit 1020.
[0162] The instruction receiving unit 1010 is used to receive a dual access operation execution message sent by the RAN device. The execution unit 1020 is used to execute the dual access operation according to the dual access operation execution message.
[0163] In some embodiments of this disclosure, the execution unit 1020 is further configured to: change the data transmission mode corresponding to the first identifier of the UE to dual access according to the dual access operation execution message; wherein the first identifier is assigned to the UE by the first network that the UE has already accessed.
[0164] In some embodiments of this disclosure, the execution unit 1020 is further configured to: access the second network according to the dual access operation execution message, obtain the second identifier allocated by the second network to the UE; register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
[0165] In some embodiments of this disclosure, the dual access operation execution message is sent by the RAN device in response to the dual access related policy; the dual access related policy is reformulated by the PCF network element based on the dual access related information and sent to the RAN device; the dual access related information is sent by the AF network element to the PCF network element to indicate the triggering of the dual access procedure.
[0166] Since the principle of solving the problem in this UE embodiment is similar to that in the above method embodiment, the implementation of this UE embodiment can be referred to in the above method embodiment, and repeated parts will not be described again.
[0167] Figure 11 A structural block diagram of an electronic device according to an embodiment of this disclosure is shown. It should be noted that... Figure 11 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of the embodiments disclosed herein.
[0168] like Figure 11As shown, the electronic device 1100 includes a central processing unit (CPU) 1101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1102 or a program loaded from a storage section 1108 into a random access memory (RAM) 1103. The RAM 1103 also stores various programs and data required for the operation of the electronic device 1100. The CPU 1101, ROM 1102, and RAM 1103 are interconnected via a bus 1104. An input / output (I / O) interface 1105 is also connected to the bus 1104.
[0169] The following components are connected to I / O interface 1105: an input section 1106 including a keyboard, mouse, etc.; an output section 1107 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1108 including a hard disk, etc.; and a communication section 1109 including a network interface card such as a LAN card, modem, etc. The communication section 1109 performs communication processing via a network such as the Internet. A drive 1110 is also connected to I / O interface 1105 as needed. Removable media 1111, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1110 as needed so that computer programs read from them can be installed into storage section 1108 as needed.
[0170] In particular, according to embodiments of this disclosure, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this disclosure include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1109, and / or installed from removable medium 1111. When the computer program is executed by central processing unit (CPU) 1101, it performs the functions defined above in the system of this disclosure.
[0171] It should be noted that the computer-readable medium disclosed herein may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, terminal device, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, terminal device, or device. In this disclosure, a computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit programs for use by or in connection with an instruction execution system, terminal device, or apparatus. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.
[0172] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.
[0173] The units described in the embodiments of this disclosure can be implemented in software or hardware. The described units can also be housed in a processor; for example, a processor may be described as including an information transmission unit. The names of these units do not necessarily limit the specific unit; for example, the information transmission unit may also be described as "a unit that transmits dual access related information to PCF network elements."
[0174] In another aspect, this disclosure also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or it may exist independently and not assembled into the electronic device. The computer-readable storage medium carries one or more programs that, when executed by the electronic device, cause the electronic device to perform the methods described in the following embodiments. For example, the electronic device may perform... Figure 2 The steps shown.
[0175] According to one aspect of this disclosure, a computer program product or computer program is provided, comprising computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in various optional implementations of the above embodiments.
[0176] It should be understood that any number of elements in the accompanying drawings is for illustrative purposes only and not for limitation, and any naming is for distinction only and has no limiting meaning.
[0177] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure 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.
[0178] 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.
Claims
1. A communication method, characterized in that, The method, executed by the application function network element, includes: Send dual access related information to the policy control function network element; the dual access related information is used to instruct the policy control function network element to trigger the dual access procedure.
2. The method according to claim 1, characterized in that, Sending dual access related information to the policy control function network element includes: The network open function network element sends the dual access related information to the policy control function network element.
3. A communication method, characterized in that, The method, executed by the policy control function network element, includes: Receive dual access related information sent by the application function network element; the dual access related information is used to indicate the triggering of the dual access process; The dual access process is triggered based on the dual access related information.
4. The method according to claim 3, characterized in that, The step of triggering the dual access process based on the dual access related information includes: Based on the dual access related information, the dual access related strategy is redefined; The dual access related policy is sent to the wireless access network device; the dual access related policy is used to instruct the wireless access network device to perform dual access operation.
5. The method according to claim 4, characterized in that, The dual access related policy is used to instruct the wireless access network device to perform an operation to change the data transmission mode to dual access for the terminal device according to the first identifier of the terminal device; the first identifier is assigned to the terminal device by the first network to which the terminal device has already been connected.
6. The method according to claim 4, characterized in that, The dual access related policy is used to instruct the wireless access network device to notify the terminal device to perform the dual access establishment operation, so that the terminal device can access the second network, obtain the second identifier allocated to the terminal device by the second network, register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
7. The method according to any one of claims 4 to 6, characterized in that, Sending the dual access related policy to the wireless access network device includes: The dual access related policy is sent to the radio access network device through the access and mobility management function network element.
8. A communication method, characterized in that, Performed by a wireless access network device, the method includes: Receive dual access related policies sent by the policy control function network element; According to the dual access related strategy, a dual access operation execution message is sent to the terminal device; the dual access operation execution message is used to instruct the terminal device to perform a dual access operation.
9. The method according to claim 8, characterized in that, The dual access operation execution message is used to instruct the terminal device to change the data transmission mode corresponding to the first identifier of the terminal device to dual access; the first identifier is assigned to the terminal device by the first network that the terminal device has already accessed.
10. The method according to claim 8, characterized in that, The dual access operation execution message is used to instruct the terminal device to access the second network, obtain the second identifier assigned to the terminal device by the second network, register and establish a session according to the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
11. The method according to any one of claims 8 to 10, characterized in that, The dual access related policy is re-formulated by the policy control function network element based on the dual access related information sent by the application function network element; the dual access related information is used to indicate the triggering of the dual access process.
12. A communication method, characterized in that, The method, executed by a terminal device, includes: Receive dual access operation execution messages sent by wireless access network devices; Perform the dual access operation according to the dual access operation execution message.
13. The method according to claim 12, characterized in that, The step of performing the dual access operation according to the dual access operation execution message includes: According to the dual access operation execution message, the data transmission mode corresponding to the first identifier of the terminal device is changed to dual access; the first identifier is assigned to the terminal device by the first network that the terminal device has already accessed.
14. The method according to claim 12, characterized in that, The step of performing the dual access operation according to the dual access operation execution message includes: According to the dual access operation execution message, access the second network and obtain the second identifier assigned to the terminal device by the second network; Register and establish a session based on the second identifier, and set the data transmission mode corresponding to the second identifier to dual access.
15. The method according to any one of claims 12 to 14, characterized in that, The dual access operation execution message is sent by the radio access network device in response to the dual access related policy; the dual access related policy is reformulated by the policy control function network element based on the dual access related information and sent to the radio access network device; the dual access related information is sent by the application function network element to the policy control function network element to indicate the triggering of the dual access process.
16. An application function network element, characterized in that, include: The information sending unit is used to send dual access related information to the policy control function network element; The dual access related information is used to instruct the policy control function network element to trigger the dual access process.
17. A policy control function network element, characterized in that, include: The information receiving unit is used to receive dual access related information sent by the application function network element; The dual access related information is used to indicate the triggering of the dual access process; The triggering unit is used to trigger the dual access process based on the dual access related information.
18. A wireless access network device, characterized in that, include: The policy receiving unit is used to receive dual access related policies sent by the policy control function network element; The instruction sending unit is configured to send a dual access operation execution message to the terminal device according to the dual access related strategy; the dual access operation execution message is used to instruct the terminal device to perform a dual access operation.
19. A terminal device, characterized in that, include: The instruction receiving unit is used to receive dual access operation execution messages sent by the wireless access network device; An execution unit is used to perform a dual access operation according to the dual access operation execution message.
20. An electronic device, characterized in that, include: One or more processors; A storage device configured to store one or more programs, which, when executed by one or more processors, cause the one or more processors to implement the method as described in any one of claims 1 to 15.
21. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 15.
22. A computer program product comprising a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 15.