CN113099402A - Network access method of terminal equipment, electronic equipment and storage medium - Google Patents
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Abstract
The embodiment of the invention relates to the technical field of communication, and discloses a network access method of terminal equipment, electronic equipment and a storage medium. The method is applied to a first network element for charging and policy control in a first network, and acquires the subscription data of the terminal equipment by requesting a second network element for providing a subscription data management function in the first network according to an access request of the terminal equipment; if the subscription data of the terminal equipment cannot be acquired, sending the access request to a third network element used for charging and policy control in the second network, and triggering the third network element to process the access request; and responding to the access request according to the processing result of the access request fed back by the third network element, so that the 4G core network can be communicated with the 5G core network, and the interaction requirement of the 4G core network and the 5G core network is met on the premise of not requiring the reconstruction of other network elements.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a network access method of terminal equipment, electronic equipment and a storage medium.
Background
The third generation Partnership Project (3 GPP) introduced a 5G network as a fifth generation mobile communication network. At present, the network elements in the network architecture based on the service interface proposed by the 3GPP include: the Policy Control Function (PCF) is responsible for QoS, charging, and access mobility Policy Control. An Access and Mobility Management Function (AMF) is responsible for user Mobility Management and connection Management. A Session Management Function (SMF) which supports the establishment, modification and release of 3GPP and Non-3GPP sessions and is responsible for the allocation and Management of user IP addresses; and implementing and terminating the unified control strategy.
The inventors of the present invention found that: in the 5G network deployment process, an MME (Mobility Management Entity) is selected according to an operator of a user terminal capability route, and before the existing network MME is completely modified, the interaction requirement between the 4G core network and the 5G core network is brought, but a network element in the existing network is difficult to meet the interaction requirement.
Disclosure of Invention
An object of embodiments of the present invention is to provide a network access method for a terminal device, an electronic device, and a storage medium, so that an interaction requirement between a 4G core network and a 5G core network is met without modifying a peripheral network element MME (Mobility Management Entity), a DRA (Diameter Routing Agent, Diameter Routing Agent node), an OCS (online Charging system), a PGW (PDN GateWay), and the like.
In order to solve the above technical problem, an embodiment of the present invention provides a network access method, which is applied to a first network element for charging and policy control in a first network, and includes: requesting a second network element used for providing a signing data management function in the first network to acquire signing data of the terminal equipment according to an access request of the terminal equipment; if the subscription data of the terminal equipment cannot be acquired, sending the access request to a third network element used for charging and policy control in the second network, and triggering the third network element to process the access request; and responding the access request according to the processing result of the access request fed back by the third network element.
The embodiment of the present invention further provides a network access method, which is applied to a third network element for charging and policy control in a second network, and includes: receiving an access request of terminal equipment sent by a first network element for charging and policy control in a first network; requesting a fourth network element for providing a subscription data management function in the second network to acquire subscription data of the terminal equipment; processing the access request according to the signing data; and sending the processing result of the access request to the first network element.
An embodiment of the present invention also provides an electronic device, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the network access method as described above.
Embodiments of the present invention also provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the computer program implements the network access method as described above.
Compared with the prior art, the embodiment of the invention has the advantages that the PCRF/PCF network elements in the 4G and 5G core networks are simply modified, when the access request of the terminal equipment is received, the second network element used for providing the subscription data management function in the first network is requested to acquire the subscription data of the terminal equipment, the access request is sent to the third network element used for charging and policy control in the second network for processing under the condition of not acquiring the subscription data, the access request is responded according to the processing result fed back by the third network element, the intercommunication between the 4G and 5G core networks is realized, and the interaction requirements of the 4G core network and the 5G core network are met.
In addition, the network speed of the first network is higher than that of the second network, the first network element is a policy control function network element PCF, and the third network element is a policy and charging rule function network element PCRF; sending the access request to a third network element for charging and policy control in the second network, comprising: converting the interface type of the access request from the N7 interface type into a Gx interface type; the converted access request is forwarded to a PCRF, and the PCRF is triggered to process the access request; responding the access request according to the processing result of the access request fed back by the third network element, wherein the responding step comprises the following steps: receiving a service response message which is fed back by the PCRF and indicates that the interface type of the processing result is a Gx interface type; converting the interface type of the service response message from the Gx interface type to the N7 interface type; and sending the service response message converted into the N7 interface type. When the 5G core network receives an access request of a 5G terminal and a terminal user is not a 5G user, the 5G core network cannot make a decision on the request, and because the N7 interface type is similar to a Gx interface type protocol, and the conversion process is simple, the PCF converts the interface type of the access request from the N7 interface type into the Gx interface type and forwards the Gx interface type to the PCRF for processing, so that the intercommunication between the 4G core network and the 5G core network can be realized on the premise that the network element transformation cost in the 5G core network and the 4G core network is low, and the interaction requirements of the 4G core network and the 5G core network are met.
In addition, the network speed of the first network is lower than that of the second network, the first network element is a Policy and Charging Rule Function (PCRF) network element, and the third network element is a Policy Control Function (PCF) network element; the sending the access request to a third network element for charging and policy control in the second network includes: sending an access request of a Gx interface type to the PCF, and triggering the PCF to process the access request; the responding the access request according to the processing result of the access request fed back by the third network element includes: receiving a service response message which is fed back by the PCF and indicates that the interface type of the processing result is a Gx interface type; and sending the service response message of the Gx interface type. When the 4G core network receives the access request of the 4G terminal and the terminal user is not the 4G user, the 4G core network cannot make a decision on the request, and the PCF can directly identify the message of the Gx interface type, so the PCRF directly forwards the access request to the PCRF for processing, and the intercommunication between the 4G core network and the 5G core network is realized.
In addition, the access request is an access request sent by a session management function network element SMF; sending the service response message converted into the N7 interface type, including: and sending the service response message converted into the N7 interface type to the SMF. The SMF network element in the 5G core network receives the message of the N7 interface type, converts the service response message of the Gx interface type into the N7 type for receiving by the SMF, and realizes the interaction requirement of the 4G core network and the 5G core network.
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One or more embodiments are illustrated by the corresponding figures in the drawings, which are not meant to be limiting.
Fig. 1 is a flowchart of a network access method of a terminal device according to a first embodiment of the present invention;
fig. 2 is an interaction flow diagram of a network access method of a terminal device according to a first embodiment of the present invention;
fig. 3 is a flowchart of a network access method of a terminal device according to a second embodiment of the present invention;
fig. 4 is an interaction flow diagram of a network access method of a terminal device according to a first embodiment of the present invention;
fig. 5 is a flowchart of a network access method of a terminal device according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to a fourth embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present invention, and the embodiments may be mutually incorporated and referred to without contradiction.
A first embodiment of the present invention relates to a network access method of a terminal device, which is applied to a first network element for charging and policy control in a first network, and a specific flow is shown in fig. 1, where the method includes: requesting a second network element used for providing a signing data management function in the first network to acquire signing data of the terminal equipment according to an access request of the terminal equipment; if the subscription data of the terminal equipment cannot be acquired, sending the access request to a third network element used for charging and policy control in the second network, and triggering the third network element to process the access request; and responding the access request according to the processing result of the access request fed back by the third network element.
The following describes implementation details of the network access method of the terminal device according to this embodiment in a specific manner, and the following description is only provided for facilitating understanding of the implementation details and is not necessary for implementing this embodiment.
In this embodiment, a network access method of a terminal device is described by taking, as an example, a Policy Control Function (Policy Control Function) PCF network element in a 5G core network as a first network, where the network access method of the terminal device in this embodiment is shown in fig. 1, and specifically includes:
Specifically, the SMF is a Session Management Function (SMF) network element in a 5G network architecture based on a service interface, which is proposed by the third Generation Partnership Project (3 GPP), and supports establishment, modification and release of 3GPP and Non-3GPP sessions, and is responsible for allocation and Management of user network IP addresses and implementation and termination of a unified control policy. When the terminal device initiates an access request to the 5G core network, a Mobility Management Entity (MME) first routes the access request according to the capability of the terminal device, that is, the 5G terminal is accessed to the 5G core network, and the 4G terminal is accessed to the 4G core network. In the 5G core network, the SMF first receives the access request and forwards the access request to the PCF network element for decision-making processing. Therefore, in this step, the PCF network element receives the access request of the terminal device sent by the SMF, and processes the access request of the terminal device.
Specifically, the second network element is a Unified Data storage (UDR) network element in the 5G core network and is responsible for providing the user subscription Data management and mobility management functions. After receiving an access request from terminal equipment of the SMF, the PCF requests the UDR for signing data of a user initiating the request, wherein the signing data comprises signing attributes of the user, different signing attributes represent network service authority of the user, and if the user signs a 4G network, the user can only obtain services provided by the 4G network; if the user signs up for 5G, it means that the user can obtain the service provided by the 5G network. If the PCF acquires the subscription data of the user in the UDR network element of the 5G network, it indicates that the terminal user has subscription information of the 5G network, and the PCF may make a decision on the access request of the user. If the PCF fails to obtain the subscription data of the user in the UDR network element of the 5G network, it indicates that the terminal user does not have the subscription information of the 5G network, and the PCF cannot accurately make a decision on the access request of the user, and then the process proceeds to step 103. The MME may only recognize the capability of the terminal device and cannot distinguish subscription information of a user to which the terminal device belongs, that is, cannot allocate a 4G user using a 5G terminal to a 4G core network to perform access request processing. . . In this step, PCF obtains the subscription data of the terminal device from UDR, and determines whether the user to which the terminal device belongs is a 5G user according to the feedback result of UDR.
Specifically, the second network is a 4G network, and the third network element is a Policy and Charging Rules Function (PCRF) network element in the 4G network, which selects and provides available Policy and Charging control decisions for the core network. In 3GPP, the PCRF in the 4G core network uses the Gx interface to receive and send messages, while the SMF in the 5G network uses the N7 interface to receive and send messages, and the PCF may directly process the N7 interface type messages sent by the SMF, while the PCRF cannot process the N7 interface type messages. Therefore, before forwarding the access request of the terminal to the third network element, the PCF needs to convert the interface type of the access request from the N7 interface type to the Gx interface type, and then forward the converted access request to the PCRF, triggering the PCRF to process the access request. In a specific example, after receiving the access request sent by the PCF, the PCRF requests the UDR in the second network for subscription data of the terminal initiating the request, then processes the access request according to the subscription data, and feeds back the processing result to the PCF in the first network.
And step 104, responding to the access request according to the processing result of the access request fed back by the third network element.
Specifically, after the third network element PCRF processes the access request, the returned processing result is fed back to the PCF in the form of a service response message, and since the interface type of the service response message sent by the PCRF is the Gx interface type, the PCF converts the service response message into the N7 type and then forwards the N7 type to the SMF after receiving the service response message, and the SMF returns the processing result of the access request to the terminal initiating the access request.
If the subscription data of the terminal device is acquired in step 102, the process proceeds to step 105, and an access request is responded according to the acquired subscription data.
Specifically, after requesting the UDR to acquire the subscription data of the terminal device, the PCF determines that the terminal device can obtain the service of the 5G network if the UDR returns the subscription data of the terminal device, and the PCF may perform decision processing on the access request of the user directly according to the acquired subscription data, and after obtaining the processing result, returns a service response message to the SMF.
In a specific implementation, an interaction flow of the 5G core network and the 4G core network in this embodiment is shown in fig. 2, and includes: step 201, the SMF firstly initiates a service request to the PCF according to the received access request of the terminal device;
step 202, PCF requests UDR in 5G core network to obtain subscription data;
step 203, the UDR returns a response of the subscription data acquisition request to the PCF; if the subscription information of the terminal initiating the access request does not exist, the PCF converts the service request in step 201 from an N7 interface message to a Gx interface message;
if the subscription information of the terminal initiating the access request exists, the PCF makes a processing decision on the access request.
Step 204, the PCF sends the converted service request to the PCRF;
step 205, the PCRF requests the UDR in the 4G core network to acquire subscription data;
step 206, the UDR returns the signing data to the PCRF;
step 207, the PCRF responds to the processing result of the service request from the PCF; the PCF converts the processing result from the N7 interface message into a Gx interface message;
in step 208, the PCF returns a response to the service request to the SMF.
Compared with the prior art, the embodiment modifies PCF/PCRF network elements in the 5G and 4G networks, so that the 5G core network and the 4G core network realize message intercommunication and forwarding, the interaction requirements of the 5G core network and the 4G core network are met with lower modification cost, and the problem of processing the network access request of the terminal equipment in the 5G and 4G network coexistence environment is solved.
A second embodiment of the present invention relates to a network access method for a terminal device. The second embodiment is different from the first embodiment in that: in the first embodiment, the network access method of the terminal device is specifically described by taking the first network as a 5G network as an example; in the present embodiment, a network access method of a terminal device will be specifically described by taking an example in which the first network is a 4G network. When the first network is a 4G network, since the PCF network element can process the message of the Gx interface type, the PCRF of the first network element in the 4G network can directly forward the access request of the terminal to the PCF network element in the 5G network without performing interface type conversion on the access request.
As shown in fig. 3, the network access method of the terminal device in this embodiment specifically includes:
Specifically, the PGW is a network element in the 4G network, which is responsible for establishing, modifying, and releasing a session, and is responsible for allocating and managing an IP address of the UE, and implementing and terminating a unified control policy.
Specifically, the second network element is a UDR in the 4G network, and after receiving the access request sent by the PGW, the PCRF requests the UDR to acquire subscription data of the terminal device, and determines how to process the access request according to whether the subscription data is acquired.
Specifically, the third network element is a PCF in the 5G network, and when the PCRF does not acquire the subscription data of the terminal device, the access request is forwarded to the PCF.
And step 304, responding to the access request according to the processing result of the access request fed back by the third network element.
And 305, responding to the access request according to the acquired subscription data, and returning a processing result to the PGW.
In a specific implementation, an interaction flow of the 4G core network and the 5G core network in this embodiment is shown in fig. 4, and includes:
step 402, the PCRF requests the UDR in the 5G core network to acquire subscription data;
step 403, the UDR returns a response of the subscription data acquisition request to the PCRF;
if the PCRF does not acquire the subscription data, step 404 is performed, and the PCRF sends the service request to the PCF;
if the PCRF obtains the subscription data, the PCRF processes the access request, and then performs step 408.
Step 405, PCF requests UDR in 4G core network to obtain subscription data;
step 406, the UDR returns subscription data to the PCF;
step 407, PCF responds to PCRF processing result of service request;
in step 408, the PCRF returns a response of the service request to the PGW.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
The third embodiment of the present invention relates to a network access method for a terminal device, which is applied to a third network element PCRF for charging and policy control in a second network. The second network in the present embodiment may be a 5G network or a 4G network.
The following describes a network access method of a terminal device in this embodiment, taking the second network as 4G as an example, and as shown in fig. 5, the method specifically includes:
Specifically, the first network element is a PCF network element in a 5G core network for charging and policy control. The interface type of the access request of the terminal device sent by the first network element is Gx type. And when the PCF in the first network requests the UDR in the first network for the subscription data of the terminal equipment and cannot acquire the subscription data, the PCF forwards the access request to the PCRF.
Specifically, the fourth network element is an UDR network element in a 4G core network for providing a subscription data management function.
Specifically, since the access request of the terminal device is forwarded from the PCF in the 5G core network to the 4G core network, indicating that the subscription attribute of the user carried by the terminal device is 4G, the PCRF can directly perform decision processing on the access request according to the subscription data after acquiring the subscription data returned by the UDR.
Specifically, after the PCRF obtains the processing result, the processing result is returned to the PCF in the 5G network, and the 5G core network returns the service response of the access request to the user.
Similarly, if the second network is 5G and the first network is 4G, the first network element is PCF, and the third network element is PCRF. After receiving the access request sent by the PCRF, the PCF requests the UDR in the second network to obtain subscription data of the terminal device of the access request, and makes a processing decision on the access request according to the obtained subscription data.
The specific implementation of this embodiment is completely the same when the second network is a 4G network and the first network is a 5G network, and the specific implementation details have been described in the above flow, and are not described again here.
It is to be understood that this embodiment is an example of the present invention, which is implemented in cooperation with the first or second embodiment. The related technical details mentioned in the first embodiment or the second embodiment are still valid in this embodiment, and the technical effects that can be achieved in the first embodiment or the second embodiment can also be achieved in this embodiment, and are not described herein again in order to reduce repetition. Accordingly, the related-art details mentioned in the present embodiment can also be applied to the first embodiment or the second embodiment.
A fourth embodiment of the invention relates to an electronic device, as shown in fig. 6, comprising at least one processor 601; and a memory 602 communicatively coupled to the at least one processor 601; the memory 602 stores instructions executable by the at least one processor 601, and the instructions are executed by the at least one processor 601 to enable the at least one processor 601 to execute the network access method of the terminal device in the first to third embodiments.
Where the memory 602 and the processor 601 are coupled by a bus, the bus may comprise any number of interconnected buses and bridges that couple one or more of the various circuits of the processor 601 and the memory 602 together. The bus may also connect various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver may be one element or a plurality of elements, such as a plurality of receivers and transmitters, providing a means for communicating with various other apparatus over a transmission medium. The data processed by the processor 601 is transmitted over a wireless medium via an antenna, which further receives the data and transmits the data to the processor 601.
The processor 601 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. While memory 602 may be used to store data used by processor 601 in performing operations.
A fifth embodiment of the present invention relates to a computer-readable storage medium storing a computer program. The computer program realizes the above-described method embodiments when executed by a processor.
That is, as can be understood by those skilled in the art, all or part of the steps in the method for implementing the embodiments described above may be implemented by a program instructing related hardware, where the program is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the method described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
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