Access management methods, policies and charging control nodes and communication systems

Abstract

This disclosure provides an access management method, a policy and charging control node, and a communication system. The access management method includes: determining a first frequency combination used by a user terminal at its current location; sending first indication information related to the first frequency to a first radio access point through a first access and mobility management node, so that the user terminal can access the first radio access point using the first frequency; and sending second indication information related to a second frequency to a second radio access point through a second policy and charging control node and a second access and mobility management node, so that the user terminal can access the second radio access point using the second frequency.

Description

Technical Field

[0001] This disclosure relates to the field of communications, and in particular to an access management method, policy and charging control node, and communication system. Background Technology

[0002] Currently, the ATSSS (Access Traffic Steer Switching Split) feature allows user terminals to access the core network through a 3GPP (3rd Generation Partnership Project) link (e.g., via a wireless base station or satellite) and simultaneously through a non-3GPP link (e.g., Wi-Fi). Summary of the Invention

[0003] The inventors noted that as satellite access technology matures, user terminals can simultaneously access the core network through two 3GPP links, improving network reliability when coverage by a single technology is insufficient and avoiding latency issues during switching between different technologies. However, when the base stations on the two 3GPP links are provided by different vendors, frequency conflicts may occur, leading to severe interference on both 3GPP links.

[0004] Accordingly, this disclosure provides an access management scheme that effectively avoids interference on the two 3GPP links by controlling the frequencies at which user terminals access the two 3GPP links respectively.

[0005] In a first aspect of this disclosure, an access management method is provided, applied to a first policy and charging control node. The method includes: determining a first frequency combination used by a user terminal at its current location, wherein the first frequency combination includes a first frequency supported by a first wireless access point and a second frequency supported by a second wireless access point, the second frequency being different from the first frequency; sending first indication information related to the first frequency to the first wireless access point through the first access and mobility management node, so that the user terminal can access the first wireless access point using the first frequency; and sending second indication information related to the second frequency to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can access the second wireless access point using the second frequency.

[0006] In some embodiments, a policy association is established with the user terminal based on a first association request sent by the first access and mobility management node for establishing a policy association with the user terminal; after receiving notification information that the user terminal has completed access or registration operations with the second access and mobility management node and established a policy association with the second policy and charging control node, a first frequency combination used by the user terminal at the current location is determined.

[0007] In some embodiments, determining the first frequency combination used by the user terminal at the current location includes: determining the first frequency combination used by the user terminal at the current location based on any one of pre-configuration information, analysis information provided by a network data analysis node, and information provided by the first access and mobility management node.

[0008] In some embodiments, the notification information is sent by the data storage node, the user terminal, or the second access and mobility management node.

[0009] In some embodiments, the system receives first location change information of the user terminal sent by the first wireless access point through the first access and mobility management node, wherein the first wireless access point sends the first location change information when the user terminal switches from the first wireless access point to a first target access point and the first target access point does not support the first frequency; based on the current location of the user terminal, it determines whether the first frequency combination can be adjusted to a second frequency combination, wherein the second frequency combination includes the second frequency and a third frequency supported by the first target access point, the third frequency being different from the first frequency and the second frequency; if the first frequency combination can be adjusted to the second frequency combination, then third indication information related to the third frequency is sent to the first wireless access point through the first access and mobility management node, so that the user terminal can switch from the first wireless access point to the first target access point using the third frequency.

[0010] In some embodiments, if the first frequency combination cannot be adjusted to the second frequency combination, a failure message is sent to the first wireless access point through the first access and mobility management node so that the user terminal can reselect a wireless access point.

[0011] In some embodiments, determining whether the first frequency combination can be adjusted to the second frequency combination includes: determining whether the first frequency combination can be adjusted to the second frequency combination based on pre-configuration information or analysis information provided by a network data analysis node.

[0012] In some embodiments, the system receives second location change information of the user terminal sent by the second wireless access point through the second access and mobility management node and the second policy and charging control node. The second wireless access point sends the second location change information when the user terminal switches from the second wireless access point to a second target access point, and the second target access point does not support the second frequency. Based on the current location of the user terminal, the system determines whether the first frequency combination can be adjusted to a third frequency combination, wherein the third frequency combination includes the first frequency and a fourth frequency supported by the second target access point, the fourth frequency being different from the first frequency and the second frequency. If the first frequency combination can be adjusted to the third frequency combination, fourth indication information related to the fourth frequency is sent to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can switch from the second wireless access point to the second target access point using the fourth frequency.

[0013] In some embodiments, if the first frequency combination cannot be adjusted to the third frequency combination, a failure message is sent to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can reselect a radio access point.

[0014] In some embodiments, determining whether the first frequency combination can be adjusted to the third frequency combination includes: determining whether the first frequency combination can be adjusted to the third frequency combination based on pre-configuration information or analysis information provided by a network data analysis node.

[0015] In a second aspect of this disclosure, a policy and charging control node is provided, wherein the policy and charging control node is a first policy and charging control node, comprising: a first processing module configured to determine a first frequency combination used by a user terminal at its current location, wherein the first frequency combination includes a first frequency supported by a first wireless access point and a second frequency supported by a second wireless access point, the second frequency being different from the first frequency; and a second processing module configured to send first indication information related to the first frequency to the first wireless access point through the first access and mobility management node, so that the user terminal can access the first wireless access point using the first frequency; and to send second indication information related to the second frequency to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can access the second wireless access point using the second frequency.

[0016] In some embodiments, the first processing module is configured to establish a policy association with the user terminal based on a first association request sent by the first access and mobility management node for establishing a policy association with the user terminal; and after receiving notification information that the user terminal has completed access or registration operations with the second access and mobility management node and established a policy association with the second policy and charging control node, determine the first frequency combination used by the user terminal at the current location.

[0017] In some embodiments, the first processing module is configured to determine the first frequency combination used by the user terminal at the current location based on any one of pre-configuration information, analysis information provided by a network data analysis node, and information provided by the first access and mobility management node.

[0018] In some embodiments, the notification information is sent by the data storage node, the user terminal, or the second access and mobility management node.

[0019] In some embodiments, the first processing module is configured to receive first location change information of the user terminal sent by the first wireless access point through the first access and mobility management node, wherein the first wireless access point sends the first location change information when the user terminal switches from the first wireless access point to a first target access point and the first target access point does not support the first frequency; based on the current location of the user terminal, determine whether the first frequency combination can be adjusted to a second frequency combination, wherein the second frequency combination includes the second frequency and a third frequency supported by the first target access point, the third frequency being different from the first frequency and the second frequency; the second processing module is configured to, if the first frequency combination can be adjusted to the second frequency combination, send third indication information related to the third frequency to the first wireless access point through the first access and mobility management node, so that the user terminal can switch from the first wireless access point to the first target access point using the third frequency.

[0020] In some embodiments, the second processing module is configured to send a failure message to the first wireless access point through the first access and mobility management node if the first frequency combination cannot be adjusted to the second frequency combination, so that the user terminal can reselect a wireless access point.

[0021] In some embodiments, the first processing module is configured to determine, based on pre-configuration information or analysis information provided by a network data analysis node, whether the first frequency combination can be adjusted to the second frequency combination.

[0022] In some embodiments, the first processing module is configured to receive second location change information of the user terminal sent by the second wireless access point through the second access and mobility management node and the second policy and charging control node, wherein the second wireless access point sends the second location change information when the user terminal switches from the second wireless access point to the second target access point and the second target access point does not support the second frequency; based on the current location of the user terminal, determine whether the first frequency combination can be adjusted to a third frequency combination, wherein the third frequency combination includes the first frequency and a fourth frequency supported by the second target access point, the fourth frequency being different from the first frequency and the second frequency; the second processing module is configured to, if the first frequency combination can be adjusted to the third frequency combination, send fourth indication information related to the fourth frequency to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can switch from the second wireless access point to the second target access point using the fourth frequency.

[0023] In some embodiments, the second processing module is configured to send a failure message to the second radio access point through the second policy and charging control node and the second access and mobility management node if the first frequency combination cannot be adjusted to the third frequency combination, so that the user terminal can reselect a radio access point.

[0024] In some embodiments, the first processing module is configured to determine, based on pre-configuration information or analysis information provided by a network data analysis node, whether the first frequency combination can be adjusted to the third frequency combination.

[0025] In a third aspect of this disclosure, a policy and charging control node is provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute instructions stored in the memory to implement the method as described in any of the above embodiments.

[0026] In a fourth aspect of this disclosure, a communication system is provided, comprising: a first policy and charging control node, wherein the first policy and charging control node is the policy and charging control node described in any of the above embodiments; and a user terminal configured to send a first request to a first access and mobility management node via a first wireless access point, send a second request to a second access and mobility management node via a second wireless access point, access the first wireless access point using the first frequency according to first indication information related to a first frequency sent by the first policy and charging control node via the first access and mobility management node and the first wireless access point, and access the first wireless access point via the second policy and charging control node and the second access and mobility management node according to the first policy and charging control node. The second access and mobility management node is configured to complete the access and registration operation of the user terminal according to the first request, and send a first association request to the first policy and charging control node for establishing a policy association with the user terminal; the second access and mobility management node is configured to complete the access or registration operation of the user terminal according to the second request, and send a second association request to the second policy and charging control node for establishing a policy association with the user terminal; the second policy and charging control node is configured to establish a policy association with the user terminal according to the second association request.

[0027] In some embodiments, the user terminal is configured to send the second request to the second wireless access point after sending the first request, provided that it is determined, based on pre-configuration information, that it is able to access the second wireless access point.

[0028] In some embodiments, the first access and mobility management node is configured to, after completing the access and registration operation of the user terminal according to the first request, determine whether the user terminal can access the core network through the second radio access point. If the user terminal can access the core network through the second radio access point, the node sends an indication message for the user terminal to send the second request to the user terminal through the first radio access point. The user terminal is configured to send the second request to the second radio access point according to the indication message.

[0029] In some embodiments, the first access and mobility management node is configured to determine whether the user terminal can access the core network through the second wireless access point based on the current location of the user terminal or information provided by the data storage node.

[0030] In some embodiments, the system further includes a data storage node configured to send the notification information to the first policy and charging control node through the first access and mobility management node after receiving an indication that the second access and mobility management node has completed the access or registration operation of the user terminal and that the second policy and charging control node has established a policy association with the user terminal.

[0031] In some embodiments, the first wireless access point is configured to, when the user terminal switches from the first wireless access point to the first target access point and the first target access point does not support the first frequency, send the user terminal's first location change information to the first policy and charging control node through the first access and mobility management node; send third indication information related to the third frequency sent by the first policy and charging control node through the first access and mobility management node to the user terminal; and the user terminal is configured to switch from the first wireless access point to the first target access point using the third frequency.

[0032] In some embodiments, the first wireless access point is configured to send failure information sent by the first policy and charging control node through the first access and mobility management node to the user terminal; the user terminal is configured to reselect a wireless access point based on the failure information.

[0033] In some embodiments, the second wireless access point is configured to, when the user terminal switches from the second wireless access point to the second target access point and the second target access point does not support the second frequency, send the second location change information of the user terminal to the first policy and charging control node through the second access and mobility management node and the second policy and charging control node; send fourth indication information related to the fourth frequency sent by the first policy and charging control node through the second policy and charging control node and the second access and mobility management node to the user terminal; the user terminal is configured to switch from the second wireless access point to the second target access point using the fourth frequency.

[0034] In some embodiments, the second wireless access point is configured to send failure information sent by the first policy and charging control node through the second policy and charging control node and the second access and mobility management node to the user terminal; the user terminal is configured to reselect a wireless access point based on the failure information.

[0035] In some embodiments, the first policy and charging control node and the second policy and charging control node are the same policy and charging control node.

[0036] According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions that, when executed by a processor, implement the method as described in any of the above embodiments.

[0037] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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 flowchart illustrating an access management method according to an embodiment of the present disclosure;

[0040] Figure 2 This is a schematic diagram of the structure of a policy and charging control node according to an embodiment of this disclosure;

[0041] Figure 3 This is a schematic diagram of the structure of a policy and billing control node according to another embodiment of this disclosure;

[0042] Figure 4 This is a schematic diagram of the structure of a communication system according to an embodiment of the present disclosure;

[0043] Figure 5 This is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure;

[0044] Figure 6 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure;

[0045] Figure 7 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure;

[0046] Figure 8 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure;

[0047] Figure 9 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure;

[0048] Figure 10 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure;

[0049] Figure 11This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure;

[0050] Figure 12 This is a flowchart illustrating an access management method according to another embodiment of the present disclosure;

[0051] Figure 13 This is a flowchart illustrating an access management method according to yet another embodiment of the present disclosure;

[0052] Figure 14 This is a flowchart illustrating an access management method according to yet another embodiment of this disclosure. Detailed Implementation

[0053] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0054] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this disclosure.

[0055] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0056] Technologies, methods and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods and equipment should be considered part of the authorization specification.

[0057] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0058] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0059] Figure 1 This is a flowchart illustrating an access management method according to an embodiment of the present disclosure. In some embodiments, the following access management method is executed by a first policy and charging control node.

[0060] In step 101, a first frequency combination is determined for the user terminal at the current location, wherein the first frequency combination includes a first frequency supported by a first wireless access point and a second frequency supported by a second wireless access point, the second frequency being different from the first frequency.

[0061] In some embodiments, a first frequency combination used by the user terminal at the current location may be determined if preset conditions are met.

[0062] For example, a policy association is established with the user terminal based on a first association request sent by the first access and mobility management node for establishing a policy association with the user terminal.

[0063] It should be noted that the user terminal sends a first request to the first access and mobility management node through the first wireless access point. The first access and mobility management node completes the access and registration operation of the user terminal according to the first request and sends a first association request to the first policy and charging control node.

[0064] Next, after receiving notification that the user terminal has completed the access or registration operation with the second access and mobility management node and established a policy association with the second policy and charging control node, the first frequency combination used by the user terminal at the current location is determined.

[0065] In some embodiments, the notification information is sent by a data storage node, a user terminal, or a second access and mobility management node.

[0066] It should be noted that the user terminal sends a second request to the second access and mobility management node through the second wireless access point. The second access and mobility management node completes the user terminal's access or registration operation based on the second request and sends a second association request to the second policy and charging control node. The second policy and charging control node establishes a policy association with the user terminal based on the second association request. After receiving, through the user terminal or the second access and mobility management node, an indication that the second access and mobility management node has completed the user terminal's access or registration operation and that the second policy and charging control node has established a policy association with the user terminal, the data storage node (e.g., a UDM (Unified Data Management) node or a UDR (Unified Data Repository)) sends a notification to the first policy and charging control node through the first access and mobility management node.

[0067] In some embodiments, after completing the access and registration operation of the user terminal according to the first request, the first access and mobility management node determines whether the user terminal can access the core network through the second radio access point. If the user terminal can access the core network through the second radio access point, the first access and mobility management node sends an indication message to the user terminal indicating that the user terminal has sent a second request to the second access and mobility management node through the second radio access point. For example, the first access and mobility management node sends the indication message to the user terminal indicating that the user terminal has sent a second request through the first radio access point.

[0068] In some embodiments, the first access and mobility management node determines whether the user terminal can access the core network through the second radio access point based on the current location of the user terminal or by using information provided by the data storage node.

[0069] In some embodiments, after sending the first request, the user terminal, if it determines that it can access the second wireless access point based on pre-configuration information, sends a second request to the second wireless access point.

[0070] In some embodiments, the first policy and charging control node determines the first frequency combination used by the user terminal at the current location based on any one of pre-configuration information, analysis information provided by the network data analysis node, and information provided by the first access and mobility management node.

[0071] In step 102, the first indication information related to the first frequency is sent to the first wireless access point through the first access and mobility management node so that the user terminal can access the first wireless access point using the first frequency.

[0072] For example, the first wireless access point sends first indication information related to the first frequency to the user terminal so that the user terminal can access the first wireless access point using the first frequency.

[0073] In step 103, the second indication information related to the second frequency is sent to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can access the second radio access point using the second frequency.

[0074] For example, the second wireless access point sends second indication information related to the second frequency to the user terminal so that the user terminal can access the second wireless access point using the second frequency.

[0075] In the access management method provided in the above embodiments of this disclosure, by allocating frequencies for user terminals to access the first wireless access point and the second wireless access point, it is ensured that user terminals can effectively avoid interference on the two links when accessing them.

[0076] In some embodiments, if the location of a user terminal changes while the user terminal is simultaneously connected to a first wireless access point and a second wireless access point, the user terminal may connect to a new wireless access point.

[0077] For example, a user terminal accesses a first wireless access point using a first frequency and a second wireless access point using a second frequency. Due to a change in the user terminal's location, the user terminal switches from the first wireless access point to a first target access point. During this process, because the first target access point does not support the first frequency used by the user terminal to access the first wireless access point, the first wireless access point sends the user terminal's location change information to the first policy and charging control node through the first access and mobility management node. The first policy and charging control node performs the following processing.

[0078] 1) Receive the first location change information of the user terminal sent by the first wireless access point through the first access and mobility management node.

[0079] 2) Based on the current location of the user terminal, determine whether the first frequency combination can be adjusted to the second frequency combination, wherein the second frequency combination includes the second frequency and the third frequency supported by the first target access point, and the third frequency is different from the first frequency and the second frequency.

[0080] For example, the first policy and billing control node determines whether the first frequency combination can be adjusted to the second frequency combination based on pre-configured information or analysis information provided by the network data analysis node.

[0081] 3) If the first frequency combination can be adjusted to the second frequency combination, the third indication information related to the third frequency is sent to the first radio access point through the first access and mobility management node, so that the user terminal can use the third frequency to access the first target access point, thereby realizing the handover from the first radio access point to the first target access point.

[0082] For example, the first wireless access point sends third indication information related to the third frequency to the user terminal so that the user terminal can access the first target access point using the third frequency.

[0083] Therefore, before the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the second wireless access point. After the user terminal's location changes, the user terminal simultaneously accesses both the first target access point and the second wireless access point.

[0084] In some embodiments, if the first frequency combination cannot be adjusted to the second frequency combination, the first policy and charging control node sends a failure message to the first radio access point through the first access and mobility management node, so that the user terminal can reselect a radio access point.

[0085] For example, a user terminal accesses a first wireless access point using a first frequency and a second wireless access point using a second frequency. Due to a change in the user terminal's location, the user terminal switches from the second wireless access point to a second target access point. During this process, because the second target access point does not support the second frequency used by the user terminal to access the second wireless access point, the second wireless access point will send the user terminal's location change information to the first policy and charging control node through the second access and mobility management node and the second policy and charging control node. The first policy and charging control node performs the following processing.

[0086] 1) Receive second location change information of the user terminal sent by the second wireless access point through the second access and mobility management node and the second policy and charging control node.

[0087] 2) Based on the current location of the user terminal, determine whether the first frequency combination can be adjusted to the third frequency combination, wherein the third frequency combination includes the first frequency and the fourth frequency supported by the second target access point, and the fourth frequency is different from the first frequency and the second frequency.

[0088] For example, the first policy and billing control node determines whether the first frequency combination can be adjusted to the third frequency combination based on pre-configured information or analysis information provided by the network data analysis node.

[0089] 3) If the first frequency combination can be adjusted to the third frequency combination, the fourth indication information related to the fourth frequency is sent to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can use the fourth frequency to access the second target access point, thereby realizing the handover from the second radio access point to the second target access point.

[0090] For example, the second wireless access point sends fourth indication information related to the fourth frequency to the user terminal so that the user terminal can access the second target access point using the fourth frequency.

[0091] Therefore, before the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the second wireless access point. After the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the target access point.

[0092] In some embodiments, if the first frequency combination cannot be adjusted to the third frequency combination, the first policy and charging control node sends a failure message to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can reselect a radio access point.

[0093] Figure 2 This is a schematic diagram of the structure of a policy and charging control node according to an embodiment of this disclosure. Figure 2 As shown, the policy and billing control node includes a first processing module 21 and a second processing module 22.

[0094] The first processing module 21 is configured to determine a first frequency combination used by the user terminal at the current location, wherein the first frequency combination includes a first frequency supported by a first wireless access point and a second frequency supported by a second wireless access point, the second frequency being different from the first frequency.

[0095] In some embodiments, the first processing module 21 may determine the first frequency combination used by the user terminal at the current location if preset conditions are met.

[0096] For example, the first processing module 21 establishes a policy association with the user terminal based on the first association request sent by the first access and mobility management node for establishing a policy association with the user terminal.

[0097] It should be noted that the user terminal sends a first request to the first access and mobility management node through the first wireless access point. The first access and mobility management node completes the access and registration operation of the user terminal according to the first request and sends a first association request to the first policy and charging control node.

[0098] Next, the first processing module 21 is configured to determine the first frequency combination used by the user terminal at its current location after receiving notification information that the user terminal has completed access or registration with the second access and mobility management node and established a policy association with the second policy and charging control node.

[0099] In some embodiments, the notification information is sent by a data storage node, a user terminal, or a second access and mobility management node.

[0100] It should be noted that the user terminal sends a second request to the second access and mobility management node through the second wireless access point. The second access and mobility management node completes the user terminal's access or registration operation based on the second request and sends a second association request to the second policy and charging control node. The second policy and charging control node establishes a policy association with the user terminal based on the second association request. After receiving the indication from the second access and mobility management node that the user terminal's access or registration operation has been completed and that the second policy and charging control node has established a policy association with the user terminal, the data storage node sends a notification message to the first policy and charging control node through the first access and mobility management node.

[0101] In some embodiments, after completing the access and registration operation of the user terminal according to the first request, the first access and mobility management node determines whether the user terminal can access the core network through the second radio access point. If the user terminal can access the core network through the second radio access point, the first access and mobility management node sends an indication message to the user terminal indicating that the user terminal should send a second request to the second access and mobility management node through the second radio access point, so that the user terminal can send a second request to the second access and mobility management node through the second radio access point. For example, the first access and mobility management node sends the indication message to the user terminal indicating that the user terminal should send a second request through the first radio access point.

[0102] In some embodiments, the first access and mobility management node determines whether the user terminal can access the core network through the second radio access point based on the current location of the user terminal or by using information provided by the data storage node.

[0103] In some embodiments, after sending the first request, if the user terminal determines that it can access the second wireless access point based on pre-configuration information, it sends a second request to the second access and mobility management node through the second wireless access point.

[0104] In some embodiments, the first processing module 21 determines the first frequency combination used by the user terminal at the current location based on pre-configuration information or analysis information provided by the network data analysis node.

[0105] The second processing module 22 is configured to send first indication information related to the first frequency to the first radio access point through the first access and mobility management node, so that the user terminal can access the first radio access point using the first frequency. Furthermore, the second processing module 22 sends second indication information related to the second frequency to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can access the second radio access point using the second frequency.

[0106] For example, a first wireless access point sends first indication information related to a first frequency to a user terminal, so that the user terminal can access the first wireless access point using the first frequency. A second wireless access point sends second indication information related to a second frequency to the user terminal, so that the user terminal can access the second wireless access point using the second frequency.

[0107] In some embodiments, if the location of a user terminal changes while the user terminal is simultaneously connected to a first wireless access point and a second wireless access point, the user terminal may connect to a new wireless access point.

[0108] For example, a user terminal accesses a first wireless access point using a first frequency and a second wireless access point using a second frequency. Due to a change in the user terminal's location, the user terminal switches from the first wireless access point to a first target access point. During this process, because the first target access point does not support the first frequency used by the user terminal to access the first wireless access point, the first wireless access point sends the user terminal's first location change information to the first policy and charging control node through the first access and mobility management node. The first processing module 21 and the second processing module 22 in the first policy and charging control node perform the following operations.

[0109] The first processing module 21 is configured to receive first location change information of a user terminal sent by the first wireless access point through the first access and mobility management node.

[0110] The first processing module 21 is configured to determine, based on the current location of the user terminal, whether the first frequency combination can be adjusted to the second frequency combination, wherein the second frequency combination includes a second frequency and a third frequency supported by the first target access point, and the third frequency is different from the first frequency and the second frequency.

[0111] For example, the first processing module 21 determines whether the first frequency combination can be adjusted to the second frequency combination based on the pre-configuration information or the analysis information provided by the network data analysis node.

[0112] The second processing module 22 is configured to, if the first frequency combination can be adjusted to the second frequency combination, send third indication information related to the third frequency to the first radio access point through the first access and mobility management node, so that the user terminal can switch from the first radio access point to the first target access point using the third frequency.

[0113] Therefore, before the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the second wireless access point. After the user terminal's location changes, the user terminal simultaneously accesses both the first target access point and the second wireless access point.

[0114] In some embodiments, if the first frequency combination cannot be adjusted to the second frequency combination, the second processing module 22 sends a failure message to the first wireless access point through the first access and mobility management node so that the user terminal can reselect a wireless access point.

[0115] For example, a user terminal accesses a first wireless access point using a first frequency and a second wireless access point using a second frequency. Due to a change in the user terminal's location, the user terminal switches from the second wireless access point to a second target access point. During this process, because the second target access point does not support the second frequency used by the user terminal to access the second wireless access point, the second wireless access point sends the user terminal's location change information to the first policy and charging control node through the second access and mobility management node and the second policy and charging control node. The first processing module 21 and the second processing module 22 in the policy and charging control node perform the following operations.

[0116] The first processing module 21 is configured to receive second location change information of a user terminal sent by the second wireless access point through the second access and mobility management node and the second policy and charging control node.

[0117] The first processing module 21 is configured to determine, based on the current location of the user terminal, whether the first frequency combination can be adjusted to the third frequency combination, wherein the third frequency combination includes the first frequency and a fourth frequency supported by the second target access point, and the fourth frequency is different from the first frequency and the second frequency.

[0118] For example, the first processing module 21 determines whether the first frequency combination can be adjusted to the third frequency combination based on the pre-configuration information or the analysis information provided by the network data analysis node.

[0119] The second processing module 22 is configured to, if the first frequency combination can be adjusted to the third frequency combination, send the fourth indication information related to the fourth frequency to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can switch from the second radio access point to the second target access point using the fourth frequency.

[0120] Therefore, before the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the second wireless access point. After the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the target access point.

[0121] In some embodiments, if the first frequency combination cannot be adjusted to the third frequency combination, the second processing module 22 sends a failure message to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can reselect the wireless access point.

[0122] Figure 3 This is a schematic diagram of the structure of a policy and charging control node according to another embodiment of this disclosure. Figure 3 As shown, the policy and billing control node includes a memory 31 and a processor 32.

[0123] Memory 31 is used to store instructions, and processor 32 is coupled to memory 31. Processor 32 is configured to execute instructions based on memory storage, as shown in the example. Figure 1 The method involved in any of the embodiments.

[0124] like Figure 3 As shown, the policy and billing control node also includes a communication interface 33 for exchanging information with other devices. Additionally, the policy and billing control node includes a bus 34, through which the processor 32, communication interface 33, and memory 31 communicate with each other.

[0125] The memory 31 may include high-speed RAM, and may also include non-volatile memory, such as at least one disk storage device. The memory 31 may also be a memory array. The memory 31 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

[0126] Furthermore, processor 32 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present disclosure.

[0127] This disclosure also relates to a computer-readable storage medium storing computer instructions that, when executed by a processor, implement... Figure 1 The method involved in any of the embodiments.

[0128] Figure 4 This is a schematic diagram of the structure of a communication system according to an embodiment of this disclosure. Figure 4 As shown, the communication system includes a user terminal 41, a first radio access point 42, a second radio access point 43, a first access and mobility management node 44, a second access and mobility management node 45, a first policy and charging control node 46, and a second policy and charging control node 47. The first policy and charging control node 46 is... Figure 2 or Figure 3 The policy and billing control node involved in any of the embodiments.

[0129] User terminal 41 is configured to send a first request to a first access and mobility management node 44 via a first wireless access point 42, send a second request to a second access and mobility management node 45 via a second wireless access point 43, access the first wireless access point 42 using a first frequency according to a first indication information related to a first frequency sent by a first policy and charging control node 46 through the first access and mobility management node 44 and the first wireless access point 42, and access the second wireless access point 43 using a second frequency according to a second indication information related to a second frequency sent by the first policy and charging control node 46 through a second policy and charging control node 47, the second access and mobility management node 45 and the second wireless access point 43.

[0130] The first access and mobility management node 44 is configured to complete the access and registration operation of the user terminal 41 according to the first request, and send a first association request to the first policy and charging control node 46 for establishing a policy association with the user terminal 41.

[0131] The second access and mobility management node 45 is configured to complete the access or registration operation of the user terminal 41 according to the second request, and send a second association request to the second policy and charging control node 47 for establishing a policy association with the user terminal 41.

[0132] The second policy and billing control node 47 is configured to establish a policy association with the user terminal 41 in accordance with the second association request.

[0133] In some embodiments, the user terminal 41 is configured to send a second request to the second wireless access point 43 after sending a first request, if it is determined from pre-configuration information that it is able to access the second wireless access point 43.

[0134] In some embodiments, the first access and mobility management node 44 is configured to, after completing the access and registration operation of the user terminal 41 according to the first request, determine whether the user terminal can access the core network through the second radio access point 43. If the user terminal 41 can access the core network through the second radio access point 43, then it sends an indication message for the user terminal 41 to send a second request to the user terminal 41 through the first radio access point 42. The user terminal 41 is configured to send a second request to the second radio access point 43 according to the indication message.

[0135] In some embodiments, the first access and mobility management node 44 is configured to determine whether the user terminal 41 can access the core network through the second wireless access point based on the current location of the user terminal or information provided by the data storage node.

[0136] Figure 5 This is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure. Figure 5 and Figure 4 The difference is that, in Figure 5 In the embodiment shown, the communication system further includes a data storage node 48, a first session control node 49, a second session control node 410, a first user plane network element 411, and a second user plane network element 412.

[0137] The data storage node 48 is configured to send a notification message to the first policy and charging control node 46 through the first access and mobility management node 44 after receiving an indication message from the second access and mobility management node 45 that the user terminal has completed the access or registration operation and the second policy and charging control node 47 has established a policy association with the user terminal.

[0138] For example, the data storage node 48 is configured to receive, via the user terminal 41 or the second access and mobility management node 45, an instruction from the second access and mobility management node 45 to complete the access or registration operation of the user terminal, and for the second policy and charging control node 47 to establish a policy association with the user terminal.

[0139] After accessing the first wireless access point 42 using the first frequency, user terminal 41 accesses the data network 413 through the first user plane network element 411. After accessing the second wireless access point 43 using the second frequency, user terminal 41 accesses the data network 413 through the second user plane network element 412 and the first user plane network element 411. Since user plane data is anchored by the same user plane network element 411, user data splitting, migration, and separation are achieved.

[0140] Figure 6 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure. Figure 6 and Figure 5 The difference is that, in Figure 6 In the illustrated embodiment, the first policy and charging control node 46 interacts with the second policy and charging control node 47 through a security isolation network element 414. The security isolation network element 414 only performs information forwarding and signaling conversion.

[0141] Figure 7 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure. Figure 7 and Figure 4 The difference is that, in Figure 7 In the embodiment shown, the communication system further includes a first target access point 421.

[0142] For example, when user terminal 41 accesses the first wireless access point 42 and the second wireless access point 43, and the location of user terminal 41 changes, user terminal 41 switches from the first wireless access point 42 to the first target access point 421. During this process, since the first target access point 421 does not support the first frequency used by user terminal 41 to access the first wireless access point 42, the first wireless access point 42 will send the user terminal's location change information to the first policy and charging control node 46 through the first access and mobility management node 44.

[0143] The first wireless access point 42 transmits the third indication information related to the third frequency, which is sent by the first policy and charging control node 46 through the first access and mobility management node 44, to the user terminal 41. Thus, the user terminal 41 accesses the first target access point 421 using the third frequency.

[0144] Therefore, before the location of user terminal 41 changes, user terminal 41 simultaneously accesses the first wireless access point 42 and the second wireless access point 43. After the location of user terminal 41 changes, user terminal 41 simultaneously accesses the first target access point 421 and the second wireless access point 43, such as... Figure 8 As shown.

[0145] In some embodiments, the first wireless access point 42 is further configured to send failure information sent by the first policy and charging control node 46 through the first access and mobility management node 44 to the user terminal 41. The user terminal 41 then selects a new wireless access point based on the failure information.

[0146] Figure 9 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure. Figure 9 and Figure 4 The difference is that, in Figure 9 In the embodiment shown, the communication system further includes a second target access point 431.

[0147] For example, when user terminal 41 accesses the first wireless access point 42 and the second wireless access point 43, and the location of user terminal 41 changes, user terminal 41 switches from the second wireless access point 43 to the second target access point 431. During this process, since the second target access point 431 does not support the second frequency used by user terminal 41 to access the second wireless access point 43, the second wireless access point 43 will send the user terminal's location change information to the first policy and charging control node 46 through the second access and mobility management node 45 and the second policy and charging control node 47.

[0148] The second wireless access point 43 transmits the fourth indication information related to the fourth frequency, which is sent by the first policy and charging control node 46 through the second policy and charging control node 47 and the second access and mobility management node 45, to the user terminal 41. The user terminal 41 then uses the fourth frequency to access the second target access point 431.

[0149] Therefore, before the location of user terminal 41 changes, user terminal 41 simultaneously accesses the first wireless access point 42 and the second wireless access point 43. After the location of user terminal 41 changes, user terminal 41 simultaneously accesses the first wireless access point 42 and the second target access point 431, such as... Figure 10 As shown.

[0150] In some embodiments, the second wireless access point 43 sends the failure information sent by the first policy and charging control node 46 through the second policy and charging control node 47 and the second access and mobility management node 45 to the user terminal 41. The user terminal 41 then selects a new wireless access point based on the failure information.

[0151] Figure 11 This is a schematic diagram of the structure of a communication system according to yet another embodiment of the present disclosure. Figure 11 and Figure 4 The difference is that, in Figure 4 In the illustrated embodiment, the communication system includes a first policy and charging control node 46 and a second policy and charging control node 47. The first policy and charging control node 46 and the second policy and charging control node 47 can be the same network element, i.e. Figure 7 The strategy and billing control node 40 in the middle.

[0152] Figure 12 This is a flowchart illustrating an access management method according to another embodiment of the present disclosure.

[0153] In step 121, the user terminal sends a first request to the first access and mobility management node through the first wireless access point. The first access and mobility management node completes the access and registration operation of the user terminal according to the first request. The first access and mobility management node sends a first association request to the first policy and charging control node, and the first policy and charging control node establishes a policy association with the user terminal.

[0154] In step 122a, the first access and mobility management node determines, based on the current location of the user terminal, that the user terminal can access the core network through the second radio access point. In this case, the first access and mobility management node sends a prompt message to the user terminal through the first radio access point.

[0155] In step 122b, the first access and mobility management node uses the information provided by the data storage node to determine that the user terminal can access the core network through the second radio access point. In this case, the first access and mobility management node sends a prompt message to the user terminal through the first radio access point.

[0156] In step 122c, the user terminal discovers a second wireless access point that it can access based on the pre-configured information.

[0157] In step 123, the user terminal sends a second request to the second access and mobility management node through the second wireless access point. The second access and mobility management node completes the access or registration operation of the user terminal based on the second request. The second access and mobility management node sends a second association request to the second policy and charging control node, and the second policy and charging control node establishes a policy association with the user terminal.

[0158] In step 124, the data storage node sends the notification information sent by the second access and mobility management node, indicating that the user terminal has completed the access or registration operation, to the first access and mobility management node.

[0159] In step 125, the first access and mobility management node sends the received notification information to the first policy and charging control node.

[0160] In step 126, the first policy and charging control node determines the first frequency combination used by the user terminal at its current location based on any one of the pre-configuration information, the analysis information provided by the network data analysis node, and the frequency information provided by the first wireless access point. The first frequency combination includes a first frequency supported by the first wireless access point and a second frequency supported by the second wireless access point, wherein the second frequency is different from the first frequency.

[0161] In step 127, the first policy and charging control node sends first indication information related to the first frequency to the user terminal through the first access and mobility management node and the first radio access point.

[0162] In step 128, the first policy and charging control node sends the second indication information related to the second frequency to the second policy and charging control node.

[0163] In step 129, the second policy and charging control node sends second indication information related to the second frequency to the user terminal through the second access and mobility management node and the second radio access point.

[0164] In step 1210, the user terminal adjusts the access frequency, using the first frequency to access the first wireless access point and the second frequency to access the second wireless access point, so as to transmit data through different user plane network elements.

[0165] Figure 13 This is a flowchart illustrating an access management method according to another embodiment of the present disclosure. In this embodiment, a user terminal accesses a first wireless access point and a second wireless access point. Due to a change in the location of the user terminal, the user terminal switches from the first wireless access point to a first target access point. During this process, since the first target access point does not support the first frequency used by the user terminal to access the first wireless access point, the first wireless access point sends the user terminal's location change information to the first policy and charging control node through the first access and mobility management node. The relevant processing flow is as follows.

[0166] In step 131, the user terminal accesses the first wireless access point using the first frequency and accesses the second wireless access point using the second frequency, so as to transmit data through different user plane network elements.

[0167] In step 132, if the location of the user terminal changes, the user terminal determines to switch from the first wireless access point to the first target access point. If the first target access point does not support the user terminal's access to the first frequency used by the first wireless access point, the first wireless access point sends the user terminal's location change information to the first policy and charging control node through the first access and mobility management node.

[0168] In step 133, the first policy and charging control node determines the second frequency combination used by the user terminal at its current location based on pre-configured information or analysis information provided by the network data analysis node. The second frequency combination includes a third frequency supported by the first target access point and a second frequency supported by the second wireless access point, wherein the third frequency is different from the first and second frequencies.

[0169] In step 134, the first policy and charging control node sends the third indication information related to the third frequency to the first radio access point through the first access and mobility management node.

[0170] In step 135, the user terminal uses the third frequency to access the first target access point, thereby completing the handover from the first wireless access point to the first target access point.

[0171] Therefore, before the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the second wireless access point. After the user terminal's location changes, the user terminal simultaneously accesses both the first target access point and the second wireless access point.

[0172] In some embodiments, if the first policy and charging control node cannot adjust the first frequency combination to the second frequency combination, the first policy and charging control node sends a failure message to the first radio access point through the first access and mobility management node so that the user terminal can reselect a radio access point.

[0173] Figure 14 This is a flowchart illustrating an access management method according to another embodiment of the present disclosure. In this embodiment, a user terminal accesses a first wireless access point and a second wireless access point. Due to a change in the user terminal's location, the user terminal switches from the second wireless access point to a second target access point. During this process, since the second target access point does not support the second frequency used by the user terminal to access the second wireless access point, the second wireless access point sends the user terminal's location change information to the first policy and charging control node through the second access and mobility management node and the second policy and charging control node. The relevant processing flow is as follows.

[0174] In step 141, the user terminal accesses the first wireless access point using the first frequency and accesses the second wireless access point using the second frequency, so as to transmit data through different user plane network elements.

[0175] In step 142, if the location of the user terminal changes, the user terminal determines to switch from the second radio access point to the second target access point. If the second target access point does not support the user terminal's access to the second frequency used by the second radio access point, the second radio access point sends the user terminal's location change information to the second policy and charging control node through the second access and mobility management node.

[0176] In step 143, the second policy and charging control node sends the location change information of the user terminal to the first policy and charging control node.

[0177] In step 144, the first policy and charging control node determines the third frequency combination used by the user terminal at its current location based on pre-configured information or analysis information provided by the network data analysis node. The third frequency combination includes the first frequency and a fourth frequency supported by the second target access point, the fourth frequency being different from the first and second frequencies.

[0178] In step 145, the first policy and charging control node sends the fourth indication information related to the fourth frequency to the second policy and charging control node.

[0179] In step 146, the second policy and charging control node sends the fourth indication information related to the fourth frequency to the second radio access point through the second access and mobility management node.

[0180] In step 147, the user terminal uses the fourth frequency to access the second target access point, thereby completing the handover from the second wireless access point to the second target access point.

[0181] Therefore, before the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the second wireless access point. After the user terminal's location changes, the user terminal simultaneously accesses both the first wireless access point and the target access point.

[0182] In some embodiments, if the first policy and charging control node cannot adjust the first frequency combination to the third frequency combination, the first policy and charging control node sends the failure information to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can reselect a radio access point.

[0183] By implementing the above embodiments of this disclosure, the following beneficial effects can be obtained:

[0184] 1) When a user terminal accesses two links simultaneously, it is not necessary for the wireless access points on the two links to be base stations from the same manufacturer, thus solving the wireless interference problem caused by dual access. For example, this disclosure can be applied to scenarios where a user terminal accesses both satellite and terrestrial base stations simultaneously, effectively reducing the latency caused by handover.

[0185] 2) Effectively improve user terminal throughput in areas with limited wireless power.

[0186] 3) It is beneficial for operators to operate multiple cross-generational technology networks (such as 4G / 5G / 6G coexistence), so that user terminals can use multiple wireless resources at the same time and make more rational use of the advantages of different frequencies.

[0187] 4) It facilitates wireless resource collaboration between different operators.

[0188] In some embodiments, the functional units described above may be implemented as general-purpose processors, programmable logic controllers (PLCs), digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof for performing the functions described herein.

[0189] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk.

[0190] The description in this disclosure is provided for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the disclosure to its forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of this disclosure and to enable those skilled in the art to understand this disclosure and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An access management method, applied to a first policy and billing control node, the method comprising: Determine a first frequency combination used by the user terminal at its current location, wherein the first frequency combination includes a first frequency supported by a first wireless access point and a second frequency supported by a second wireless access point, the second frequency being different from the first frequency; The first indication information related to the first frequency is sent to the first wireless access point through the first access and mobility management node, so that the user terminal can access the first wireless access point using the first frequency; The second indication information related to the second frequency is sent to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can access the second wireless access point using the second frequency.

2. The method according to claim 1, wherein, Determining the first frequency combination used by the user terminal at its current location includes: A policy association is established with the user terminal according to a first association request sent by the first access and mobility management node for establishing a policy association with the user terminal; After receiving notification that the user terminal has completed access and registration with the second access and mobility management node and established a policy association with the second policy and charging control node, the system determines the first frequency combination used by the user terminal at its current location.

3. The method according to claim 1, wherein, Determining the first frequency combination used by the user terminal at its current location includes: Based on any one of the pre-configuration information, the analysis information provided by the network data analysis node, and the information provided by the first access and mobility management node, the first frequency combination used by the user terminal at the current location is determined.

4. The method according to claim 2, wherein, The notification information is sent by the data storage node, the user terminal, or the second access and mobility management node.

5. The method according to any one of claims 1-4, further comprising: The first location change information of the user terminal is received by the first wireless access point through the first access and mobility management node, wherein the first wireless access point sends the first location change information when the user terminal switches from the first wireless access point to the first target access point and the first target access point does not support the first frequency. Based on the current location of the user terminal, it is determined whether the first frequency combination can be adjusted to the second frequency combination, wherein the second frequency combination includes the second frequency and a third frequency supported by the first target access point, and the third frequency is different from the first frequency and the second frequency. If the first frequency combination can be adjusted to the second frequency combination, then the third indication information related to the third frequency is sent to the first wireless access point through the first access and mobility management node, so that the user terminal can use the third frequency to switch from the first wireless access point to the first target access point.

6. The method according to claim 5, further comprising: If the first frequency combination cannot be adjusted to the second frequency combination, a failure message is sent to the first wireless access point through the first access and mobility management node so that the user terminal can reselect a wireless access point.

7. The method according to claim 5, wherein, Determining whether the first frequency combination can be adjusted to the second frequency combination includes: Based on the pre-configuration information or the analysis information provided by the network data analysis node, determine whether the first frequency combination can be adjusted to the second frequency combination.

8. The method according to any one of claims 1-4, further comprising: The second wireless access point receives second location change information of the user terminal sent by the second wireless access point through the second access and mobility management node and the second policy and charging control node, wherein the second wireless access point sends the second location change information when the user terminal switches from the second wireless access point to the second target access point and the second target access point does not support the second frequency. Based on the current location of the user terminal, it is determined whether the first frequency combination can be adjusted to a third frequency combination, wherein the third frequency combination includes the first frequency and a fourth frequency supported by the second target access point, and the fourth frequency is different from the first frequency and the second frequency. If the first frequency combination can be adjusted to the third frequency combination, then the fourth indication information related to the fourth frequency is sent to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can use the fourth frequency to switch from the second radio access point to the second target access point.

9. The method according to claim 8, further comprising: If the first frequency combination cannot be adjusted to the third frequency combination, a failure message is sent to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can reselect a radio access point.

10. The method according to claim 8, wherein, Determining whether the first frequency combination can be adjusted to the third frequency combination includes: Based on the pre-configuration information or the analysis information provided by the network data analysis node, determine whether the first frequency combination can be adjusted to the third frequency combination.

11. A policy and charging control node, wherein the policy and charging control node is a first policy and charging control node, comprising: The first processing module determines a first frequency combination used by the user terminal at its current location, wherein the first frequency combination includes a first frequency supported by a first wireless access point and a second frequency supported by a second wireless access point, and the second frequency is different from the first frequency. The second processing module is configured to send first indication information related to the first frequency to the first wireless access point through the first access and mobility management node, so that the user terminal can access the first wireless access point using the first frequency. The second indication information related to the second frequency is sent to the second wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can access the second wireless access point using the second frequency.

12. The node according to claim 11, wherein, The first processing module is configured to establish a policy association with the user terminal based on a first association request sent by the first access and mobility management node for establishing a policy association with the user terminal; and after receiving notification information that the user terminal has completed access or registration operations with the second access and mobility management node and established a policy association with the second policy and charging control node, determine the first frequency combination used by the user terminal at the current location.

13. The node according to claim 11, wherein, The first processing module is configured to determine the first frequency combination used by the user terminal at the current location based on any one of the pre-configuration information, the analysis information provided by the network data analysis node, and the information provided by the first access and mobility management node.

14. The node according to claim 12, wherein, The notification information is sent by the data storage node, the user terminal, or the second access and mobility management node.

15. The node according to any one of claims 11-14, wherein, The first processing module is configured to receive first location change information of the user terminal sent by the first wireless access point through the first access and mobility management node, wherein the first wireless access point sends the first location change information when the user terminal switches from the first wireless access point to a first target access point and the first target access point does not support the first frequency; and determine, based on the current location of the user terminal, whether the first frequency combination can be adjusted to a second frequency combination, wherein the second frequency combination includes the second frequency and a third frequency supported by the first target access point, the third frequency being different from the first frequency and the second frequency; The second processing module is configured to send third indication information related to the third frequency to the first wireless access point through the first access and mobility management node if the first frequency combination can be adjusted to the second frequency combination, so that the user terminal can switch from the first wireless access point to the first target access point using the third frequency.

16. The node according to claim 15, wherein, The second processing module is configured to send a failure message to the first wireless access point through the first access and mobility management node if the first frequency combination cannot be adjusted to the second frequency combination, so that the user terminal can reselect a wireless access point.

17. The node according to claim 15, wherein, The first processing module is configured to determine, based on pre-configuration information or analysis information provided by network data analysis nodes, whether the first frequency combination can be adjusted to the second frequency combination.

18. The node according to any one of claims 11-14, wherein, The first processing module is configured to receive second location change information of the user terminal sent by the second wireless access point through the second access and mobility management node and the second policy and charging control node, wherein the second wireless access point sends the second location change information when the user terminal switches from the second wireless access point to the second target access point and the second target access point does not support the second frequency; and determine, based on the current location of the user terminal, whether the first frequency combination can be adjusted to a third frequency combination, wherein the third frequency combination includes the first frequency and a fourth frequency supported by the second target access point, the fourth frequency being different from the first frequency and the second frequency; The second processing module is configured to, if the first frequency combination can be adjusted to the third frequency combination, send fourth indication information related to the fourth frequency to the second radio access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal can use the fourth frequency to switch from the second radio access point to the second target access point.

19. The node according to claim 18, wherein, The second processing module is configured to send a failure message to the second radio access point through the second policy and charging control node and the second access and mobility management node if the first frequency combination cannot be adjusted to the third frequency combination, so that the user terminal can reselect a radio access point.

20. The node according to claim 18, wherein, The first processing module is configured to determine, based on pre-configuration information or analysis information provided by network data analysis nodes, whether the first frequency combination can be adjusted to the third frequency combination.

21. A policy and billing control node, comprising: Memory; A processor, coupled to a memory, configured to implement the method as described in any one of claims 1-10 based on memory-stored instruction execution.

22. A communication system, comprising: The first strategy and charging control node is the strategy and charging control node as described in any one of claims 11-21; The user terminal is configured to send a first request to a first access and mobility management node through a first wireless access point, send a second request to a second access and mobility management node through a second wireless access point, access the first wireless access point using the first frequency according to a first indication information related to a first frequency sent by the first policy and charging control node through the first access and mobility management node and the first wireless access point, and access the second wireless access point using the second frequency according to a second indication information related to a second frequency sent by the first policy and charging control node through the second policy and charging control node, the second access and mobility management node and the second wireless access point. The first access and mobility management node is configured to complete the access and registration operation of the user terminal according to the first request, and send a first association request to the first policy and charging control node for establishing a policy association with the user terminal; The second access and mobility management node is configured to complete the access or registration operation of the user terminal according to the second request, and send a second association request to the second policy and charging control node for establishing a policy association with the user terminal; The second policy and billing control node is configured to establish a policy association with the user terminal based on the second association request.

23. The system according to claim 22, wherein, The user terminal is configured to send the second request to the second wireless access point after sending the first request, provided that it has determined, based on pre-configuration information, that it can access the second wireless access point.

24. The system according to claim 22, wherein, The first access and mobility management node is configured to, after completing the access and registration operation of the user terminal according to the first request, determine whether the user terminal can access the core network through the second wireless access point. If the user terminal can access the core network through the second wireless access point, the node will send the indication information of the user terminal sending the second request to the user terminal through the first wireless access point. The user terminal is configured to send the second request to the second wireless access point according to the instruction information.

25. The system according to claim 24, wherein, The first access and mobility management node is configured to determine whether the user terminal can access the core network through the second wireless access point based on the current location of the user terminal or information provided by the data storage node.

26. The system of claim 22, further comprising: The data storage node is configured to send a notification message to the first policy and charging control node through the first access and mobility management node after receiving an indication message from the second access and mobility management node that the second policy and charging control node has completed the access or registration operation of the user terminal and established a policy association with the user terminal.

27. The system according to any one of claims 22-26, wherein, The first wireless access point is configured to, when the user terminal switches from the first wireless access point to the first target access point and the first target access point does not support the first frequency, send the first location change information of the user terminal to the first policy and charging control node through the first access and mobility management node; and send the third indication information related to the third frequency sent by the first policy and charging control node through the first access and mobility management node to the user terminal. The user terminal is configured to switch from the first wireless access point to the first target access point using the third frequency.

28. The system according to claim 27, wherein, The first wireless access point is configured to send failure information sent by the first policy and charging control node through the first access and mobility management node to the user terminal; The user terminal is configured to reselect a wireless access point based on the failure information.

29. The system according to any one of claims 22-26, wherein, The second wireless access point is configured to, when the user terminal switches from the second wireless access point to the second target access point and the second target access point does not support the second frequency, send the second location change information of the user terminal to the first policy and charging control node through the second access and mobility management node and the second policy and charging control node; and send the fourth indication information related to the fourth frequency sent by the first policy and charging control node through the second policy and charging control node and the second access and mobility management node to the user terminal. The user terminal is configured to switch from the second wireless access point to the second target access point using the fourth frequency.

30. The system according to claim 29, wherein, The second wireless access point is configured to send failure information sent by the first policy and charging control node through the second policy and charging control node and the second access and mobility management node to the user terminal. The user terminal is configured to reselect a wireless access point based on the failure information.

31. The system according to any one of claims 22-26, wherein, The first policy and billing control node and the second policy and billing control node are the same policy and billing control node.

32. A computer-readable storage medium, wherein, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the method as described in any one of claims 1-10.

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