Access management method, policy and charging control node, and communication system

Abstract

The present disclosure provides an access management method, a policy and charging control node, and a communication system. The access management method comprises: determining a first frequency combination used by a user terminal at a current position; sending, to a first wireless access point by means of a first access and mobility management node, first indication information related to a first frequency, so that the user terminal uses the first frequency to access the first wireless access point; and sending, to a second wireless access point by means of a second policy and charging control node and a second access and mobility management node, second indication information related to a second frequency, so that the user terminal uses the second frequency to access the second wireless access point.

Description

Access management method, policy and charging control node and communication system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure is based on and claims priority to an application with CN application number 202311240786.X and filing date September 25, 2023. The disclosure content of the CN application is hereby introduced into this disclosure as a whole. Technical Field

[0003] The present disclosure relates to the field of communications, and in particular to an access management method, a policy and charging control node, and a communication system. Background Art

[0004] 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 (for example, through a wireless base station or satellite) and a non-3GPP (such as Wi-Fi (Wireless Fidelity)) link at the same time.

[0005] Summary of the Invention

[0006] In a first aspect of the present 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 a 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; sending first indication information related to the first frequency to the first wireless access point via the first access and mobility management node, so that the user terminal accesses 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 via the second policy and charging control node and the second access and mobility management node, so that the user terminal accesses the second wireless access point using the second frequency.

[0007] In some embodiments, a policy association is established with the user terminal based on a first association request sent by a first access and mobility management node for establishing a policy association with the user terminal; after receiving notification information that the user terminal completes the access or registration operation with the second access and mobility management node and establishes 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.

[0008] In some embodiments, determining the first frequency combination adopted by the user terminal at the current location includes: determining the first frequency combination adopted 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.

[0009] In some embodiments, the notification information is sent by a data storage node, the user terminal or the second access and mobility management node.

[0010] In some embodiments, first location change information of the user terminal is received from the first wireless access point via 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, the first wireless access point 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, 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, third indication information related to the third frequency is sent to the first wireless access point via the first access and mobility management node, so that the user terminal switches from the first wireless access point to the first target access point using the third frequency.

[0011] 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 via the first access and mobility management node so that the user terminal reselects a wireless access point.

[0012] 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 according to pre-configured information or analysis information provided by a network data analysis node.

[0013] In some embodiments, second location change information of the user terminal is received from the second wireless access point via 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 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 method 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 via the second policy and charging control node and the second access and mobility management node, so that the user terminal switches from the second wireless access point to the second target access point using the fourth frequency.

[0014] In some embodiments, if the first frequency combination cannot be adjusted to the third frequency combination, a failure message is sent to the second wireless access point via the second policy and charging control node and the second access and mobility management node, so that the user terminal reselects a wireless access point.

[0015] 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 according to pre-configured information or analysis information provided by a network data analysis node.

[0016] In a second aspect of the present 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 a 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; a second processing module configured to send first indication information related to the first frequency to the first wireless access point via the first access and mobility management node, so that the user terminal accesses the first wireless access point using the first frequency; and send second indication information related to the second frequency to the second wireless access point via the second policy and charging control node and the second access and mobility management node, so that the user terminal accesses the second wireless access point using the second frequency.

[0017] 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; after receiving notification information that the user terminal completes the access or registration operation with the second access and mobility management node and establishes 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.

[0018] 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 the network data analysis node, and information provided by the first access and mobility management node.

[0019] In some embodiments, the notification information is sent by a data storage node, the user terminal or the second access and mobility management node.

[0020] 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 via 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; 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; and 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 via the first access and mobility management node, so that the user terminal switches from the first wireless access point to the first target access point using the third frequency.

[0021] In some embodiments, the second processing module is configured to send failure information 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 reselects a wireless access point.

[0022] In some embodiments, the first processing module is configured to determine whether the first frequency combination can be adjusted to the second frequency combination according to pre-configured information or analysis information provided by a network data analysis node.

[0023] 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 via 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 is handed over from the second wireless access point to a second target access point and the second target access point does not support the second frequency; 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; and 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 via the second policy and charging control node and the second access and mobility management node, so that the user terminal can hand over from the second wireless access point to the second target access point using the fourth frequency.

[0024] In some embodiments, if the first frequency combination cannot be adjusted to the third frequency combination, the second processing module is configured to send 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 reselects a wireless access point.

[0025] In some embodiments, the first processing module is configured to determine whether the first frequency combination can be adjusted to the third frequency combination according to pre-configured information or analysis information provided by a network data analysis node.

[0026] In a third aspect of the present 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 the method according to any of the above embodiments based on instructions stored in the memory.

[0027] In a fourth aspect of the present disclosure, a communication system is provided, including: a first policy and charging control node, the first policy and charging control node being the policy and charging control node described in any one of the foregoing embodiments; and a user terminal, configured to send a first request to a first access and mobility management node through a first wireless access point, and to 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 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 send a second request to a second access and mobility management node according to the first policy and charging control node through the second policy and charging control node and the second access and mobility management node. and second indication information related to the second frequency sent by the second wireless access point, accessing the second wireless access point using the second frequency; the first access and mobility management node is configured to complete the access and registration operations of the user terminal according to the first request, and send a first association request for establishing a policy association with the user terminal to the first policy and charging control node; the second access and mobility management node is configured to complete the access or registration operations of the user terminal according to the second request, and send a second association request for establishing a policy association with the user terminal to the second policy and charging control node; the second policy and charging control node is configured to establish a policy association with the user terminal according to the second association request.

[0028] In some embodiments, after sending the first request, the user terminal is configured to, if it is determined according to pre-configuration information that the second wireless access point can be accessed, send the second request to the second wireless access point.

[0029] In some embodiments, the first access and mobility management node is configured to, after completing access and registration operations for 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, send an indication message for the user terminal to send the second request to the user terminal through the first wireless access point; and the user terminal is configured to send the second request to the second wireless access point according to the indication message.

[0030] 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 using information provided by a data storage node.

[0031] In some embodiments, the above-mentioned system also includes a data storage node, which is configured to send the notification information to the first policy and charging control node through the first access and mobility management node after receiving the indication information that the second access and mobility management node completes the access or registration operation of the user terminal and the second policy and charging control node establishes a policy association with the user terminal.

[0032] In some embodiments, the first wireless access point is configured to, when the user terminal is handed over 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 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 third indication information related to a 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 hand over from the first wireless access point to the first target access point using the third frequency.

[0033] 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; and the user terminal is configured to reselect a wireless access point according to the failure information.

[0034] In some embodiments, the second wireless access point is configured to, when the user terminal is handed over 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 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 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; and the user terminal is configured to use the fourth frequency to hand over from the second wireless access point to the second target access point.

[0035] 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; and the user terminal is configured to reselect a wireless access point based on the failure information.

[0036] 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.

[0037] According to a fifth aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method described in any of the above embodiments is implemented.

[0038] According to a sixth aspect of an embodiment of the present disclosure, a computer program is provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, the method described in any of the above embodiments is implemented.

[0039] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] FIG1 is a schematic diagram of a flow chart of an access management method according to an embodiment of the present disclosure;

[0042] FIG2 is a schematic diagram of the structure of a policy and charging control node according to an embodiment of the present disclosure;

[0043] FIG3 is a schematic diagram of the structure of a policy and charging control node according to another embodiment of the present disclosure;

[0044] FIG4 is a schematic structural diagram of a communication system according to an embodiment of the present disclosure;

[0045] FIG5 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0046] FIG6 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0047] FIG7 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0048] FIG8 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0049] FIG9 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0050] FIG10 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0051] FIG11 is a schematic structural diagram of a communication system according to another embodiment of the present disclosure;

[0052] FIG12 is a flow chart of an access management method according to another embodiment of the present disclosure;

[0053] FIG13 is a schematic flow chart of an access management method according to another embodiment of the present disclosure;

[0054] FIG14 is a flow chart of an access management method according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0056] Unless specifically stated otherwise, the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure.

[0057] 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.

[0058] 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.

[0059] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0060] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0061] The inventors noted that as satellite access technology matures, user terminals can access the core network via two 3GPP links simultaneously. This improves network reliability when a single technology's coverage is insufficient and avoids latency issues associated with handovers between different technologies. However, if the base stations in the two 3GPP links are provided by different vendors, frequency conflicts may occur, resulting in severe interference between the two 3GPP links.

[0062] Accordingly, the present disclosure provides an access management solution that effectively avoids interference generated on the two 3GPP links by controlling the frequencies at which a user terminal accesses two 3GPP links respectively.

[0063] Figure 1 is a flow chart of 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 and includes steps 101-103.

[0064] In step 101, a first frequency combination used by a user terminal at a current location is determined, where 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.

[0065] In some embodiments, the first frequency combination used by the user terminal at the current location may be determined when a preset condition is met.

[0066] For example, according to a first association request sent by the first access and mobility management node for establishing a policy association with the user terminal, a policy association is established with the user terminal.

[0067] 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 operations of the user terminal according to the first request, and sends a first association request to the first policy and charging control node.

[0068] Next, after receiving notification information that the user terminal completes the access or registration operation with the second access and mobility management node and establishes 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.

[0069] In some embodiments, the notification information is sent by a data storage node, a user terminal, or a second access and mobility management node.

[0070] 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 access or registration operation of the user terminal according to 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 according to the second association request. After receiving the indication information from the user terminal or the second access and mobility management node that the second access and mobility management node completes the access or registration operation of the user terminal and the second policy and charging control node establishes 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 information to the first policy and charging control node through the first access and mobility management node.

[0071] In some embodiments, after completing access and registration operations for the user terminal in accordance with the first request, the first access and mobility management node determines 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 first access and mobility management node sends, to the user terminal, an instruction indicating that the user terminal is sending the second request to the second access and mobility management node through the second wireless access point. For example, the first access and mobility management node sends the instruction indicating that the user terminal is sending the second request to the user terminal through the first wireless access point.

[0072] In some embodiments, the first access and mobility management node determines 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 using information provided by the data storage node.

[0073] In some embodiments, after sending the first request, the user terminal sends a second request to the second wireless access point if it determines that it can access the second wireless access point according to the pre-configuration information.

[0074] In some embodiments, the first policy and charging control node determines a first frequency combination used by the user terminal at the current location based on any one of pre-configured information, analysis information provided by the network data analysis node, and information provided by the first access and mobility management node.

[0075] In step 102, first indication information related to a first frequency is sent to a first wireless access point via a first access and mobility management node, so that a user terminal accesses the first wireless access point using the first frequency.

[0076] 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 accesses the first wireless access point using the first frequency.

[0077] In step 103, 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 accesses the second wireless access point using the second frequency.

[0078] 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 accesses the second wireless access point using the second frequency.

[0079] In the access management method provided in the above embodiment of the present disclosure, by allocating frequencies for accessing the first wireless access point and the second wireless access point to the user terminal, interference between the two links is effectively avoided when the user terminal accesses the two links.

[0080] In some embodiments, when a user terminal accesses a first wireless access point and a second wireless access point at the same time, if the location of the user terminal changes, the user terminal may access a new wireless access point.

[0081] For example, a user terminal accesses a first wireless access point using a first frequency and accesses a second wireless access point using a second frequency. 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, 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 location change information of the user terminal to the first policy and charging control node via the first access and mobility management node. The first policy and charging control node performs the following processing.

[0082] 1) Receive first location change information of a user terminal sent by a first wireless access point via a first access and mobility management node.

[0083] 2) According to the current location of the user terminal, determine whether the first frequency combination can be adjusted to a second frequency combination, where 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.

[0084] For example, the first policy and charging control node determines whether the first frequency combination can be adjusted to the second frequency combination according to pre-configured information or analysis information provided by the network data analysis node.

[0085] 3) If the first frequency combination can be adjusted to the second frequency combination, 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 accesses the first target access point using the third frequency, thereby achieving handover from the first wireless access point to the first target access point.

[0086] 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 accesses the first target access point using the third frequency.

[0087] Thus, before the location of the user terminal changes, the user terminal accesses the first wireless access point and the second wireless access point simultaneously. After the location of the user terminal changes, the user terminal accesses the first target access point and the second wireless access point simultaneously.

[0088] 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 wireless access point through the first access and mobility management node, so that the user terminal reselects a wireless access point.

[0089] For another example, a user terminal accesses a first wireless access point using a first frequency and accesses 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 location change information of the user terminal to the first policy and charging control node via 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.

[0090] 1) Receive second location change information of a user terminal sent by a second wireless access point through a second access and mobility management node and a second policy and charging control node.

[0091] 2) According to the current location of the user terminal, determine whether the first frequency combination can be adjusted to a third frequency combination, where 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.

[0092] For example, the first policy and charging control node determines whether the first frequency combination can be adjusted to the third frequency combination according to pre-configured information or analysis information provided by the network data analysis node.

[0093] 3) 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 accesses the second target access point using the fourth frequency, thereby achieving handover from the second wireless access point to the second target access point.

[0094] 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 accesses the second target access point using the fourth frequency.

[0095] Thus, before the location of the user terminal changes, the user terminal accesses the first wireless access point and the second wireless access point simultaneously. After the location of the user terminal changes, the user terminal accesses the first wireless access point and the second target access point simultaneously.

[0096] 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 wireless access point through the second policy and charging control node and the second access and mobility management node, so that the user terminal reselects a wireless access point.

[0097] FIG2 is a schematic diagram of the structure of a policy and charging control node according to an embodiment of the present disclosure. As shown in FIG2 , the policy and charging control node includes a first processing module 21 and a second processing module 22 .

[0098] The first processing module 21 is configured to determine a first frequency combination used by the user terminal at a current location, wherein 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, and the second frequency is different from the first frequency.

[0099] In some embodiments, the first processing module 21 may determine a first frequency combination used by the user terminal at the current location if a preset condition is met.

[0100] For example, the first processing module 21 establishes a policy association with the user terminal according to the first association request sent by the first access and mobility management node for establishing a policy association with the user terminal.

[0101] 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 operations of the user terminal according to the first request, and sends a first association request to the first policy and charging control node.

[0102] Next, the first processing module 21 is configured to determine the first frequency combination used by the user terminal at the current location after receiving notification information that the user terminal completes the access or registration operation with the second access and mobility management node and establishes a policy association with the second policy and charging control node.

[0103] In some embodiments, the notification information is sent by a data storage node, a user terminal, or a second access and mobility management node.

[0104] 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 access or registration operation of the user terminal 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 information indicating that the second access and mobility management node completes the access or registration operation of the user terminal and that the second policy and charging control node establishes a policy association with the user terminal, the data storage node sends a notification information to the first policy and charging control node through the first access and mobility management node.

[0105] In some embodiments, after completing access and registration operations for the user terminal in accordance with the first request, the first access and mobility management node determines 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 first access and mobility management node sends, to the user terminal, instruction information indicating that the user terminal is sending a second request to the second access and mobility management node through the second wireless access point, so that the user terminal is sending the second request to the second access and mobility management node through the second wireless access point. For example, the first access and mobility management node sends the instruction information indicating that the user terminal is sending the second request to the user terminal through the first wireless access point.

[0106] In some embodiments, the first access and mobility management node determines 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 using information provided by the data storage node.

[0107] In some embodiments, after sending the first request, the user terminal sends a second request to the second access and mobility management node through the second wireless access point if it determines that it can access the second wireless access point according to the pre-configuration information.

[0108] In some embodiments, the first processing module 21 determines the first frequency combination used by the user terminal at the current location according to pre-configured information or analysis information provided by the network data analysis node.

[0109] The second processing module 22 is configured to send first indication information related to the first frequency to the first wireless access point via the first access and mobility management node, so that the user terminal accesses the first wireless access point using the first frequency. Furthermore, the second processing module 22 sends second indication information related to the second frequency to the second wireless access point via the second policy and charging control node and the second access and mobility management node, so that the user terminal accesses the second wireless access point using the second frequency.

[0110] 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 accesses 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 accesses the second wireless access point using the second frequency.

[0111] In some embodiments, when a user terminal accesses a first wireless access point and a second wireless access point at the same time, if the location of the user terminal changes, the user terminal may access a new wireless access point.

[0112] For example, a user terminal accesses a first wireless access point using a first frequency and accesses a second wireless access point using a second frequency. 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 first location change information of the user terminal to the first policy and charging control node via 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.

[0113] The first processing module 21 is configured to receive first location change information of a user terminal sent by a first wireless access point through a first access and mobility management node.

[0114] The first processing module 21 is configured to determine whether the first frequency combination can be adjusted to a second frequency combination according to the current location of the user terminal, 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.

[0115] For example, the first processing module 21 determines whether the first frequency combination can be adjusted to the second frequency combination according to pre-configured information or analysis information provided by the network data analysis node.

[0116] 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 wireless access point through the first access and mobility management node, so that the user terminal switches from the first wireless access point to the first target access point using the third frequency.

[0117] Thus, before the location of the user terminal changes, the user terminal accesses the first wireless access point and the second wireless access point simultaneously. After the location of the user terminal changes, the user terminal accesses the first target access point and the second wireless access point simultaneously.

[0118] In some embodiments, if the first frequency combination cannot be adjusted to the second frequency combination, the second processing module 21 sends a failure message to the first wireless access point through the first access and mobility management node, so that the user terminal reselects a wireless access point.

[0119] For another example, a user terminal accesses a first wireless access point using a first frequency and accesses a second wireless access point using a second frequency. Due to a change in the location of the user terminal, 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 location change information of the user terminal to the first policy and charging control node via 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.

[0120] The first processing module 21 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.

[0121] The first processing module 21 is configured to determine, based on a current location of the user terminal, whether the first frequency combination can be adjusted to a third frequency combination, where 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.

[0122] For example, the first processing module 21 determines whether the first frequency combination can be adjusted to the third frequency combination according to pre-configured information or analysis information provided by the network data analysis node.

[0123] The second processing module 22 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.

[0124] Thus, before the location of the user terminal changes, the user terminal accesses the first wireless access point and the second wireless access point simultaneously. After the location of the user terminal changes, the user terminal accesses the first wireless access point and the second target access point simultaneously.

[0125] 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 reselects a wireless access point.

[0126] FIG3 is a schematic diagram of the structure of a policy and charging control node according to another embodiment of the present disclosure. As shown in FIG3 , the policy and charging control node includes a memory 31 and a processor 32 .

[0127] The memory 31 is used to store instructions. The processor 32 is coupled to the memory 31 . The processor 32 is configured to execute the method involved in any embodiment in FIG. 1 based on the instructions stored in the memory.

[0128] As shown in Figure 3, the policy and charging control node also includes a communication interface 33 for exchanging information with other devices. Furthermore, the policy and charging control node also includes a bus 34 through which the processor 32, the communication interface 33, and the memory 31 communicate with each other.

[0129] Memory 31 may include high-speed RAM memory or non-volatile memory, such as at least one disk drive. Memory 31 may also be a memory array. Memory 31 may also be divided into blocks, and the blocks may be combined into virtual volumes according to certain rules.

[0130] Furthermore, the processor 32 may be a central processing unit (CPU), or may be an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the present disclosure.

[0131] The present disclosure also relates to a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the method involved in any embodiment of FIG. 1 is implemented.

[0132] Figure 4 is a schematic diagram of the structure of a communication system according to one embodiment of the present disclosure. As shown in Figure 4, the communication system includes a user terminal 41, a first wireless access point 42, a second wireless 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. First policy and charging control node 46 is the policy and charging control node involved in any of the embodiments of Figures 2 or 3.

[0133] The user terminal 41 is configured to send a first request to the first access and mobility management node 44 through the first wireless access point 42, and send a second request to the second access and mobility management node 45 through the second wireless access point 43. Based on first indication information related to the first frequency sent by the first policy and charging control node 46 through the first access and mobility management node 44 and the first wireless access point 42, the user terminal 41 accesses the first wireless access point 42 using the first frequency. Based on second indication information related to the second frequency sent by the first policy and charging control node 46 through the second policy and charging control node 47, the second access and mobility management node 45, and the second wireless access point 43, the user terminal 41 accesses the second wireless access point 43 using the second frequency.

[0134] The first access and mobility management node 44 is configured to complete the access and registration operations of the user terminal 41 according to the first request, and send a first association request for establishing a policy association with the user terminal 41 to the first policy and charging control node 46 .

[0135] 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 for establishing a policy association with the user terminal 41 to the second policy and charging control node 47 .

[0136] The second policy and charging control node 47 is configured to establish a policy association with the user terminal 41 according to the second association request.

[0137] In some embodiments, after sending the first request, the user terminal 41 is configured to send a second request to the second wireless access point 43 if it is determined according to the pre-configuration information that the second wireless access point 43 can be accessed.

[0138] In some embodiments, after completing the access and registration operations for the user terminal 41 according to the first request, the first access and mobility management node 44 is configured to determine whether the user terminal can access the core network through the second wireless access point 43. If the user terminal 41 can access the core network through the second wireless access point 43, the first access and mobility management node 44 is configured to send an instruction for the user terminal 41 to send the second request to the user terminal 41 through the first wireless access point 42. The user terminal 41 is configured to send the second request to the second wireless access point 43 according to the instruction.

[0139] 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 using information provided by the data storage node.

[0140] Figure 5 is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure. Figure 5 differs from Figure 4 in that, in the embodiment shown in Figure 5 , 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 .

[0141] The data storage node 48 is configured to send notification information to the first policy and charging control node 46 through the first access and mobility management node 44 after receiving indication information that the second access and mobility management node 45 completes the access or registration operation of the user terminal and the second policy and charging control node 47 establishes a policy association with the user terminal.

[0142] For example, the data storage node 48 is configured to receive indication information through the user terminal 41 or the second access and mobility management node 45 that the second access and mobility management node 45 completes the access or registration operation of the user terminal and the second policy and charging control node 47 establishes a policy association with the user terminal.

[0143] After user terminal 41 accesses first wireless access point 42 using a first frequency, it accesses data network 413 through first user plane network element 411. After user terminal 41 accesses second wireless access point 43 using a second frequency, it accesses data network 413 through second user plane network element 412 and first user plane network element 411. Because user plane data is anchored by the same user plane network element 411, user data is offloaded, migrated, and separated.

[0144] Figure 6 is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure. Figure 6 differs from Figure 5 in that, in the embodiment shown in Figure 6, first policy and charging control node 46 interacts with second policy and charging control node 47 via secure isolation network element 414. Secure isolation network element 414 performs only information forwarding and signaling conversion.

[0145] FIG7 is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure. FIG7 differs from FIG4 in that, in the embodiment shown in FIG7 , the communication system further includes a first target access point 421 .

[0146] For example, user terminal 41 accesses first wireless access point 42 and second wireless access point 43. Due to a change in the location of user terminal 41, user terminal 41 switches from first wireless access point 42 to first target access point 421. During this process, because first target access point 421 does not support the first frequency used by user terminal 41 to access first wireless access point 42, first wireless access point 42 sends user terminal location change information to first policy and charging control node 46 via first access and mobility management node 44.

[0147] The first wireless access point 42 sends the third indication information related to the third frequency sent by the first policy and charging control node 46 through the first access and mobility management node 44 to the user terminal 41. As a result, the user terminal 41 accesses the first target access point 421 using the third frequency.

[0148] Thus, before the location of the user terminal 41 changes, the user terminal 41 simultaneously accesses the first wireless access point 42 and the second wireless access point 43. After the location of the user terminal 41 changes, the user terminal 41 simultaneously accesses the first target access point 421 and the second wireless access point 43, as shown in FIG8 .

[0149] In some embodiments, the first wireless access point 42 is further configured to send the 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 reselects a wireless access point according to the failure information.

[0150] FIG9 is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure. FIG9 differs from FIG4 in that, in the embodiment shown in FIG9 , the communication system further includes a second target access point 431 .

[0151] For example, user terminal 41 accesses first wireless access point 42 and second wireless access point 43. Due to a change in the location of user terminal 41, user terminal 41 switches from second wireless access point 43 to second target access point 431. During this process, because second target access point 431 does not support the second frequency used by user terminal 41 to access second wireless access point 43, second wireless access point 43 sends user terminal location change information to first policy and charging control node 46 via second access and mobility management node 45 and second policy and charging control node 47.

[0152] The second wireless access point 43 sends the fourth indication information related to the fourth frequency 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 accesses the second target access point 431 using the fourth frequency.

[0153] Thus, before the location of the user terminal 41 changes, the user terminal 41 simultaneously accesses the first wireless access point 42 and the second wireless access point 43. After the location of the user terminal 41 changes, the user terminal 41 simultaneously accesses the first wireless access point 42 and the second target access point 431, as shown in FIG10 .

[0154] 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 reselects a wireless access point according to the failure information.

[0155] Figure 11 is a schematic diagram of the structure of a communication system according to another embodiment of the present disclosure. Figure 11 differs from Figure 4 in that, in the embodiment shown in Figure 4, the communication system includes a first policy and charging control node 46 and a second policy and charging control node 47. First policy and charging control node 46 and second policy and charging control node 47 can be the same network element, namely, policy and charging control node 40 in Figure 7.

[0156] FIG12 is a flow chart of an access management method according to another embodiment of the present disclosure.

[0157] 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 user terminal's access and registration operations based on 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.

[0158] 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 wireless access point. In this case, the first access and mobility management node sends a prompt message to the user terminal through the first wireless access point.

[0159] 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 wireless access point. In this case, the first access and mobility management node sends a prompt message to the user terminal through the first wireless access point.

[0160] In step 122c, the user terminal discovers a second wireless access point that it can access based on the pre-configured information.

[0161] 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 for 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. The second policy and charging control node establishes a policy association with the user terminal.

[0162] In step 124, the data storage node sends the notification information of completing the access or registration operation of the user terminal, which is sent by the second access and mobility management node, to the first access and mobility management node.

[0163] In step 125, the first access and mobility management node sends the received notification information to the first policy and charging control node.

[0164] In step 126, the first policy and charging control node determines a first frequency combination used by the user terminal at the current location based on any one of the preconfigured 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, where the second frequency is different from the first frequency.

[0165] 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 wireless access point.

[0166] In step 128, the first policy and charging control node sends second indication information related to the second frequency to the second policy and charging control node.

[0167] 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 wireless access point.

[0168] In step 1210, the user terminal adjusts the access frequency, 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.

[0169] Figure 13 is a schematic flow diagram of 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 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 information about the user terminal's location change to the first policy and charging control node via the first access and mobility management node. The relevant processing flow is as follows.

[0170] In step 131, a user terminal accesses a first wireless access point using a first frequency and accesses a second wireless access point using a second frequency, so as to transmit data through different user plane network elements.

[0171] In step 132, if the location of the user terminal changes, the user terminal determines to switch from the first wireless access point to a first target access point. If 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 location change information of the user terminal to the first policy and charging control node via the first access and mobility management node.

[0172] In step 133, the first policy and charging control node determines a second frequency combination to be used by the user terminal at the current location based on preconfigured 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, where the third frequency is different from the first frequency and the second frequency.

[0173] In step 134, the first policy and charging control node sends third indication information related to the third frequency to the first wireless access point through the first access and mobility management node.

[0174] In step 135, the user terminal accesses the first target access point using the third frequency, thereby completing the handover from the first wireless access point to the first target access point.

[0175] Thus, before the location of the user terminal changes, the user terminal accesses the first wireless access point and the second wireless access point simultaneously. After the location of the user terminal changes, the user terminal accesses the first target access point and the second wireless access point simultaneously.

[0176] 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 wireless access point through the first access and mobility management node, so that the user terminal reselects a wireless access point.

[0177] Figure 14 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, 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 transmits information about the user terminal's location change to the first policy and charging control node via the second access and mobility management node and the second policy and charging control node. The relevant processing flow is as follows.

[0178] In step 141, a user terminal accesses a first wireless access point using a first frequency and accesses a second wireless access point using a second frequency, so as to transmit data through different user plane network elements.

[0179] In step 142, if the location of the user terminal changes, the user terminal determines to switch from the second wireless access point to a second target access point. If 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 location change information of the user terminal to the second policy and charging control node via the second access and mobility management node.

[0180] 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.

[0181] In step 144, the first policy and charging control node determines a third frequency combination to be used by the user terminal at the current location based on preconfigured 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, where the fourth frequency is different from the first frequency and the second frequency.

[0182] In step 145, the first policy and charging control node sends fourth indication information related to the fourth frequency to the second policy and charging control node.

[0183] In step 146, the second policy and charging control node sends fourth indication information related to the fourth frequency to the second wireless access point through the second access and mobility management node.

[0184] In step 147, the user terminal accesses the second target access point using the fourth frequency, thereby completing the handover from the second wireless access point to the second target access point.

[0185] Thus, before the location of the user terminal changes, the user terminal accesses the first wireless access point and the second wireless access point simultaneously. After the location of the user terminal changes, the user terminal accesses the first wireless access point and the second target access point simultaneously.

[0186] 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 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 reselects a wireless access point.

[0187] By implementing the above embodiments of the present disclosure, the following beneficial effects can be achieved:

[0188] 1) When a user terminal accesses two links simultaneously, it is not necessary to require the wireless access points on both links to be from the same manufacturer, thus resolving the wireless interference issue caused by dual access. For example, this disclosure can be applied to scenarios where a user terminal simultaneously accesses a satellite and a ground base station, effectively reducing the delay caused by handover.

[0189] 2) Effectively deliver user terminal throughput in certain wireless power-limited areas.

[0190] 3) It is beneficial for operators to operate multiple cross-generation 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.

[0191] 4) It is conducive to achieving wireless resource collaboration among operators.

[0192] In some embodiments, the functional units described above may be implemented as general-purpose processors, programmable logic controllers (PLC), digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any appropriate combination thereof, for performing the functions described in the present disclosure.

[0193] Those skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware, or by a program to instruct the relevant hardware, and the program may be stored in a computer-readable storage medium, which may be a read-only memory, a disk, or an optical disk, etc.

[0194] The description of the present disclosure is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present disclosure and to enable those skilled in the art to understand the present disclosure and design various embodiments with various modifications suitable for specific applications.

Claims

1. An access management method, applied to a first policy and charging control node, the method comprising: Determine a first frequency combination used by the user terminal at a 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; 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 accesses the first wireless access point using the first frequency; 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 accesses the second wireless access point using the second frequency.

2. The access management method according to claim 1, wherein: Determining a first frequency combination used by the user terminal at the current location includes: Establishing a policy association 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 information that the user terminal completes access and registration operations with the second access and mobility management node and establishes 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.

3. The access management method according to claim 1, wherein: Determining a first frequency combination used by the user terminal at the current location includes: 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.

4. The access management method according to claim 1, wherein: The notification information is sent by the data storage node, the user terminal or the second access and mobility management node.

5. The access management method according to any one of claims 1 to 4, further comprising: receiving 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; Determining, according to a 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, 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, 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 uses the third frequency to switch from the first wireless access point to the first target access point.

6. The access management 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 reselects a wireless access point.

7. The access management method according to claim 5, wherein: Determining whether the first frequency combination can be adjusted to a second frequency combination includes: According to the pre-configuration information or the analysis information provided by the network data analysis node, it is determined whether the first frequency combination can be adjusted to the second frequency combination.

8. The access management method according to any one of claims 1 to 4, further comprising: receiving 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 a second target access point and the second target access point does not support the second frequency; determining, according to 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 is 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 uses the fourth frequency to switch from the second wireless access point to the second target access point.

9. The access management method according to claim 8, further comprising: If the first frequency combination cannot be adjusted to the third frequency combination, failure information 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 reselects a wireless access point.

10. The access management method according to claim 8, wherein: Determining whether the first frequency combination can be adjusted to a third frequency combination includes: According to the pre-configuration information or the analysis information provided by the network data analysis node, it is determined 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: A first processing module determines a first frequency combination used by the user terminal at a 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; 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 accesses the first wireless access point using the first frequency; 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 accesses the second wireless access point using the second frequency.

12. The policy and charging control node according to claim 11, wherein: The first processing module is configured to establish a policy association 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; upon receiving the first association request sent by the user terminal After the terminal completes the access or registration operation with the second access and mobility management node and establishes the notification information of the 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.

13. The policy and charging control 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 pre-configuration information, analysis information provided by a network data analysis node, and information provided by the first access and mobility management node.

14. The policy and charging control node according to claim 11, wherein: The notification information is sent by the data storage node, the user terminal or the second access and mobility management node.

15. The policy and charging control node according to any one of claims 11 to 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; determine whether the first frequency combination can be adjusted to a second frequency combination according to the current location of the user terminal, 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; 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 switches from the first wireless access point to the first target access point using the third frequency.

16. The policy and charging control node according to claim 15, wherein: The second processing module is configured to send failure information 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 reselects a wireless access point.

17. The policy and charging control node according to claim 15, wherein: The first processing module is configured to determine whether the first frequency combination can be adjusted to the second frequency combination according to pre-configuration information or analysis information provided by a network data analysis node.

18. The policy and charging control node according to any one of claims 11 to 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 a second target access point and the second target access point does not support the second frequency; determine whether the first frequency combination can be adjusted to a third frequency combination according to the current location of the user terminal, 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; 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 switches from the second wireless access point to the second target access point using the fourth frequency.

19. The policy and charging control node according to claim 18, wherein: The second processing module is configured to send failure information to the second wireless 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 reselects a wireless access point.

20. The policy and charging control node according to claim 18, wherein: The first processing module is configured to determine whether the first frequency combination can be adjusted to the third frequency combination according to pre-configuration information or analysis information provided by a network data analysis node.

21. A policy and charging control node, comprising: Memory; A processor is coupled to the memory, and the processor is configured to execute the access management method according to any one of claims 1 to 10 based on instructions stored in the memory.

22. A communication system comprising: A first policy and charging control node, wherein the first policy and charging control node is the policy and charging control node according to any one of claims 11 to 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 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 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 access and registration operations of the user terminal according to the first request, and send a first association request for establishing a policy association with the user terminal to the first policy and charging control node; 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 for establishing a policy association with the user terminal to the second policy and charging control node; The second policy and charging control node is configured to establish a policy association with the user terminal according to the second association request.

23. The communication system according to claim 22, wherein: The user terminal is configured to, after sending the first request, send the second request to the second wireless access point if it is determined according to pre-configuration information that the second wireless access point can be accessed.

24. The communication system according to claim 22, wherein: The first access and mobility management node is configured to, after completing the access and registration operations 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, and if the user terminal can access the core network through the second wireless access point, send 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 wireless access point the second ask.

25. The communication 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 according to the current location of the user terminal or using information provided by a data storage node.

26. The communication system according to claim 22, further comprising: The data storage node is configured to send the notification information to the first policy and charging control node through the first access and mobility management node after receiving the indication information that the second access and mobility management node completes the access or registration operation of the user terminal and the second policy and charging control node establishes a policy association with the user terminal.

27. The communication system according to any one of claims 22 to 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 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 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 communication 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 according to the failure information.

29. The communication system according to any one of claims 22 to 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, The second access and mobility management node and the second policy and charging control node send the second location change information of the user terminal to the first policy and charging control node; the first policy and charging control node sends 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 communication 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 according to the failure information.

31. A communication system according to any one of claims 22 to 26, wherein: The first policy and charging control node and the second policy and charging control node are the same policy and charging control node.

32. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer instructions, and when the instructions are executed by a processor, the access management method according to any one of claims 1 to 10 is implemented.

33. A computer program, comprising computer instructions, wherein when the computer instructions are executed by a processor, the access management method according to any one of claims 1 to 10 is implemented.

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