CN112583713A - Traffic routing control method, network device, system and storage medium - Google Patents
Traffic routing control method, network device, system and storage medium Download PDFInfo
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- CN112583713A CN112583713A CN201910944779.5A CN201910944779A CN112583713A CN 112583713 A CN112583713 A CN 112583713A CN 201910944779 A CN201910944779 A CN 201910944779A CN 112583713 A CN112583713 A CN 112583713A
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Abstract
Embodiments of the present invention provide a traffic routing control method, a network device, a system, and a storage medium, where a first capability open interface and a second capability open interface that can respectively interact with AF and SMF for control information are extended on an anchor point UPF, so that AF and SMF can interact with each other through their capability open interfaces instead of through PCF, and because UPF is closer to an access point of an application user than PCF, it is beneficial to increase transmission speed of traffic routing control information, improve efficiency of SMF in managing traffic routing of the application user, thereby reducing perception of the application user on server switching and the like, and improving user experience.
Description
Technical Field
The present invention relates to the field of mobile communications, and in particular, to a traffic routing control method, a network device, a system, and a storage medium.
Background
In the related art, when a traffic or a route of an Application user needs to be adjusted, an AF (Application Function Network element) may send a request to a PCF (Packet Control Function Network element) of a core Network through an NEF (Network capability Exposure Function Network element) or an N5 interface, and then the PCF processes the request and sends the processed request to an SMF (Session Management Function Network element), so as to achieve a purpose of managing a user plane traffic route or a traffic Control rule of the Application user. However, as the PCF belongs to the core network, the PCF is far away from the user side, for example, one PCF may be deployed in several cities, in this case, once the application user is switched, the AF close to the user side interacts with the SMF through the PCF to realize the application user traffic or route control, the interaction is more complicated, which causes a problem of low control efficiency, and thus the user side has obvious perception on switching and the like, and experiences are poor.
Disclosure of Invention
The embodiment of the invention provides a flow routing control method, network equipment, a system and a storage medium, and mainly solves the technical problems that: in the related technology, the efficiency of the flow routing control of the interaction between the AF and the SMF is not high, and the user experience is poor.
To solve the foregoing technical problem, an embodiment of the present invention provides a first traffic routing control method, including:
AF confirms that a network element SMF needing a session management function is required to manage the flow routing of an application user;
the AF sends the traffic routing control information to the SMF through a capability openness interface of an anchor point UPF (User Plane Function, User Plane functional entity), where the anchor point UPF is a UPF serving as a PSA (Protocol Data Unit Session anchor), and the capability openness interface includes a first capability openness interface where the anchor point UPF interacts with the AF side and a second capability openness interface where the anchor point UPF interacts with the SMF side.
The embodiment of the present invention further provides a second traffic routing control method, including:
receiving, by an anchor point UPF, traffic routing control information sent by an AF through a first capability open interface, where the traffic routing control information is used to request the SMF to manage a traffic route of an application user, and the anchor point UPF is a UPF serving as a PSA to which the application user is attached;
and the anchor point UPF sends the flow routing control information to the SMF through a second capability open interface of the anchor point UPF.
The embodiment of the present invention further provides a third traffic routing control method, including:
the SMF receives traffic routing control information sent by the AF through a second capability open interface of an anchor point UPF, the traffic routing control information is received by the anchor point UPF from the AF through a first capability open interface of the SMF, and the anchor point UPF is a UPF serving as PSA (pressure sensitive adhesive) attached by an application user;
and the SMF manages the traffic routing of the application user according to the traffic routing control information.
The embodiment of the invention also provides network equipment, which comprises a processor, a memory and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is used for executing a first flow routing control program stored in the memory so as to realize the steps of the first flow routing control method; or, the processor is configured to execute a second traffic routing control program stored in the memory to implement the second traffic routing control method; or, the processor is configured to execute a third traffic routing control program stored in the memory, so as to implement the steps of the third traffic routing control method.
The embodiment of the invention also provides a network system which is characterized by comprising an AF, an anchor point UPF and an SMF, wherein the AF communicates with the anchor point UPF through a first capability open interface of the anchor point UPF, and the anchor point UPF communicates with the SMF through a second capability open interface of the anchor point UPF; the AF is a network device in which the processor executes a first traffic routing control program to implement the first traffic routing control method; the anchor point UPF is a network device for implementing the second traffic routing control method by executing a second traffic routing control program by the processor; the SMF is a network device in which the processor executes a third traffic routing control program to implement the third traffic routing control method.
The embodiment of the present invention further provides a storage medium, where the storage medium stores at least one of a first traffic routing control program, a second traffic routing control program, and a third traffic routing control program, and the first traffic routing control program is executable by one or more processors to implement the steps of the first traffic routing control program method; the second traffic routing control program may be executed by one or more processors to implement the steps of the second traffic routing control program method described above; the third traffic routing control program may be executed by one or more processors to implement the steps of the third traffic routing control program method described above.
The invention has the beneficial effects that:
according to the traffic routing control method, the network device, the system and the storage medium provided by the embodiment of the invention, when the AF determines that the SMF needs to be requested to manage the traffic routing of the application user, the AF sends the traffic routing control information to the anchor UPF serving as the PSA, and the anchor UPF sends the traffic routing control information to the SMF through the capability open interface of the anchor UPF so that the SMF can manage the traffic routing of the application user according to the traffic routing control information. The traffic routing control scheme provided by this embodiment extends the first capability open interface and the second capability open interface that can respectively interact with AF and SMF for control information on the anchor point UPF, so that AF and SMF can not pass through PCF any more when interacting, but can be implemented through their capability open interfaces based on UPF.
Additional features and corresponding advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is an interaction flowchart of a traffic routing control method according to a first embodiment of the present invention;
fig. 2 is a diagram illustrating an application user attaching to an anchor point UPF according to a first embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an application user attaching to two anchor points UPF according to a first embodiment of the present invention;
FIG. 4 is an interaction flow diagram of a subscription flow of a management event provided in an embodiment of the present invention;
fig. 5 is an interaction flowchart of a traffic routing control method according to a second example 1 of the present invention;
fig. 6 is an interaction flowchart of a traffic routing control method according to a second example 2 of the present invention;
fig. 7 is a schematic diagram of a hardware structure of a network device according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The first embodiment is as follows:
in order to solve the problem that in the related art, an AF only interacts with an SMF through a PCF, which results in low efficiency of traffic routing management control applied by the AF and the SMF, and affects user experience, this embodiment provides a traffic routing control method, please refer to an interaction flow chart of the traffic routing control method shown in fig. 1:
s102: the AF determines that it needs to request the SMF to manage the traffic routing for the application user.
If the AF determines that the current application user is switched or finds that the current traffic distribution rule cannot meet the requirements of the application user, the AF may determine that the AF needs to send traffic routing control information to the SMF to request the SMF to manage the traffic routing of the application user. It should be understood that the scenario that the AF determines that the traffic routing control message needs to be sent to the SMF is not limited to the above two scenarios, and the AF may determine that the traffic routing control message needs to be sent to the SMF as long as the AF determines that the traffic or the route of the application user needs to be managed by the SMF.
S104: and the AF sends the traffic routing control information to the anchor point UPF through a first capability open interface of the anchor point UPF.
In this embodiment, although traffic routing control information is transmitted through the UPF, the traffic routing control information is actually a kind of control information, and is not user plane data. In some examples, it is the control information used by the AF to request the SMF to manage the flow control rules for the application user. In some other examples of this embodiment, the traffic routing control information may also be control information that requests the SMF to control the user-plane traffic routing of the application user management application user.
When determining that it is necessary to send traffic routing control information to the SMF, the AF may generate traffic routing control information, and then send the traffic routing control information to the anchor UPF through the first capability open interface of the anchor UPF, so that the anchor UPF sends the traffic routing control information to the SMF.
In this embodiment, the anchor UPF is the UPF that is the PDU session anchor, i.e., the UPF that is the PSA to which the application user is attached. When an application is used by an application user, the user terminal that installs the application needs to be successfully attached to a PSA whose UPF corresponds to the anchor UPF of the application user.
It will be appreciated that in some cases the core network may select a PSA for the application user depending on policy, for example, in fig. 2: the application user UE 21 accesses through AN Access Network (AN) 22, and thereby attaches to AN anchor UPF 23, and the anchor UPF 23 is in communication connection with AN AF 24. The AF 24 may enable interaction with the SMF 25 via the anchor UPF 23.
In other examples of this embodiment, the core network may also select two or more PSAs for the application user, for example, in fig. 3: the application user UE 31 is accessed through AN 32, and is simultaneously attached to the first anchor UPF 34 and the second anchor UPF 35 through a UPF 33 which is AN UL CL (Uplink Classifier), so that the AF 36 can interact with the SMF37 through the first anchor UPF 34 or the second anchor UPF 35. In fig. 3, there are a total of three UPFs, two of which are PSAs and the other acts as an upstream classifier. In other examples, when an application user has two or more PSAs, the attachment at each session anchor Point may also be implemented by UPF (branch Point) which is BP.
In this embodiment, an anchor UPF generally includes two capability openness interfaces, one is a first capability openness interface interacting with the AF side, and the other is a second capability openness interface interacting with the SMF side. It will be appreciated that the interaction of the anchor UPF with the SMF side does not mean that the anchor UPF interacts directly with the SMF, as it is highly likely that the two will also interact indirectly through the aforementioned branching point or upstream classifier.
It is understood that, as the branch point or the upstream classifier, UPFs are also included, and these UPFs may also include two capability openness interfaces, one is a capability openness interface interacting with the SMF side, and the other is a capability openness interface interacting with the AF side, and these capability openness interfaces are all interfaces supporting interaction of control information.
S106: and the anchor point UPF sends the traffic routing control information to the SMF through the second capability open interface.
After receiving the traffic routing control information sent by the AF, the anchor UPF may send the traffic routing control information to the SMF through its second capability open interface. It can be understood that the UPF generally implements transmission of user plane data, but in this embodiment, the anchor UPF has an open interface with the second capability, and can implement transmission of control information between the SMF and the AF.
The anchor point UPF can directly send the flow routing control information to the SMF through the second capability open interface of the anchor point UPF without forwarding through other UPFs. However, in some other examples of this embodiment, the anchor UPF may also send the traffic routing control information to the UPF as a branch point or as an uplink classifier through its second capability open interface, and the branch point UPF or the uplink classifier UPF forwards the traffic routing control information to the SMF by using its capability open interface.
S108: and the SMF manages the traffic route of the application user according to the traffic route control information.
The SMF may receive traffic routing control information that the UPF directly or indirectly sends through its second capability open interface, and then manage the traffic routing of the application according to the traffic routing control information: and if the flow routing control information is flow control information, the SMF manages the flow control rule of the application user according to the flow control information. And if the traffic routing control information is the routing control information, the SMF manages the user plane traffic routing of the application user according to the routing control information. For example, if the SMF is requested to replace the server for the application subscriber in the traffic routing control information, the SMF may change the transmission path of the user plane traffic for the application subscriber according to the traffic routing control information. For another example, if the AF sends traffic routing control information to the SMF because a new PSA is established, the N6 interface route of the new PSA may also be included in the traffic routing control information.
In some examples of this embodiment, the AF and the SMF may further include other control information besides traffic routing control information, for example, in some examples of this embodiment, the AF may further send a management event subscription message to the SMF through a capability open interface of the anchor UPF, where the management event subscription message is used for the SMF to monitor a management event of an application user, and when the SMF monitors that a certain management event or certain management events subscribed to by the AF occur, the AF is notified by sending a management event notification, so that the AF determines whether to interact with the SMF according to the corresponding management event to request the SMF to manage traffic or route of the application user. Referring now to FIG. 4, an interaction flow diagram of a process for managing an event subscription is shown:
s402: and the AF sends the management event subscription message to the anchor UPF through a first capacity management interface of the anchor UPF.
In this embodiment, when the AF needs to subscribe to the SMF for the management event of an application user, the AF may send a management event subscription message to the anchor UPF, so as to send the management event subscription message to the SMF through the anchor UPF. In this embodiment, the management event corresponding to the application user includes establishment of a new PSA, release of a PSA, movement of the application user, and the like.
S404: and the anchor UPF sends the management event subscription message to the SMF through a second capability open interface of the anchor UPF.
Similar to forwarding traffic routing control information to the SMF, after receiving a management event subscription message sent by the AF through a first capability open interface of an anchor point UPF, the anchor point UPF may directly transmit the management event subscription message to the SMF through a second capability open interface thereof, and in the case of a branch point or an uplink classifier, the anchor point UPF may also send the management event subscription message to the UPF serving as the branch point or the uplink classifier through the second capability open interface thereof, and then forward the management event subscription message to the SMF by the UPF.
S406: the SMF monitors the management events subscribed to by the management event subscription message.
After receiving the management event subscription message sent by the AF from the anchor UPF through a direct or forwarding way, the SMF may monitor the management event subscribed in the management event subscription message. For example, assuming that the administrative event that manages the subscription of the event subscription message is the movement of the application user, the SMF needs to constantly monitor the current location of the application user.
S408: and the SMF sends a management event notice to the anchor UPF through the second capability open interface of the anchor UPF after at least one management event subscribed by the management event subscription message occurs.
After the SMF determines that the management event subscribed by the AF occurs, it may notify the AF through a management event notification, in this embodiment, the SMF may directly send the management event notification to the second capability open interface of the anchor UPF, or may forward the management event notification to the anchor UPF through the UPF serving as a branch point or an uplink classifier.
It is understood that in the management event subscription message sent by the AF to the SMF, only one management event may be subscribed to, or two or more management events may be subscribed to at the same time. In the process of monitoring the management event by the SMF according to the management event subscription message, the management event notification can be sent to the AF only after one management event subscribed by the AF is found, and the AF is notified after all the management events are not required to be generated.
S410: the anchor UPF sends a management event notification to the AF.
The anchor UPF receives the management event notification directly sent by the SMF through the second capability open interface, or after receiving the management event notification forwarded by the UPF serving as the branch point or the uplink classifier through the second capability open interface, the anchor UPF may send the management event notification to the AF through the first capability open interface. After receiving the management event notification, the AF may determine, according to the management event notification, management of the application user, for example, whether it needs to change its user plane traffic route or whether it needs to request the SMF to manage its traffic control rule, and if so, the AF may determine that it needs to send traffic routing control information to the SMF. It will be appreciated, therefore, that in some cases the AF determination that traffic routing control information needs to be sent to the SMF is determined from a management event notification received from the SMF.
In the traffic routing control method provided in the embodiment of the present invention, the AF may interact with the SMF through the capability open interface of the anchor UPF, so as to send traffic routing control information or a management event subscription message to the SMF, and the SMF may also send a management event notification to the UPF through the capability open interface of the anchor UPF, so that the anchor UPF sends the management event notification subscribed by the AF to the AF, so that the AF determines how to perform traffic routing management on the application user. The control information interaction scheme utilizes the characteristic that PSA sinks under the mobile edge computing deployment scene and is closer to the user side, and can quickly realize the interaction of control information, thereby improving the efficiency of SMF (simple message format) for controlling and managing the flow or route of an application user, reducing the perception of the user side and enhancing the user experience.
Example two:
in order to enable those skilled in the art to further clarify the advantages and details of the traffic routing control method, the present embodiment will be described with reference to the following example:
example 1:
in the initial attachment process, the core network selects a session anchor point for the user according to the policy, as shown in fig. 2, in the operation process, if the AF finds that the current server cannot meet the service requirement of the application user or needs to reconfigure the flow control rule of the application user, the AF interacts with the SMF through the capability open interface of the session anchor point to complete the change of the user plane path or the flow control rule. For a specific process, please refer to the flowchart shown in fig. 5:
s502: the application user successfully attaches to a session anchor point; this procedure can be seen in the 3GPP 23.502 protocol.
S504: the AF detects that the current server or the current flow control rule cannot meet the service requirement of the application user, and needs to change the flow routing or the flow control rule of the user plane.
S506: the AF sends a request message to the anchor UPF.
It will be appreciated that in this example, the request message may include traffic routing control information, or may be an administrative event subscription message for the AF to subscribe to certain administrative events of the application user, such as PSA new or release, etc.
S508: the anchor UPF sends the request message to the SMF through the second capability open interface.
S510: and after receiving the request of the AF, the SMF executes corresponding action according to the request information.
And performing corresponding actions according to the request information, wherein the actions comprise adding, replacing or deleting a UPF to change the user plane traffic route of the application user, or updating the flow control rule in the specified UPF, or recording the management event subscription message of the AF so as to inform the AF when the subscribed management event occurs.
Example 2:
in the initial attach process, the core network selects two session anchors to the user according to the policy, as shown in fig. 3. In operation, when the SMF finds that a management event subscribed to by the AF occurs, it sends a management event notification to the AF via the anchor UPF (or after forwarding to the anchor UPF via the BP/ULCL). The AF performs corresponding processing (e.g., server relocation) upon receiving the management event notification, and then the traffic routing control information sends N6 port routing details for the new PSA to the SMF. The specific process is shown in fig. 6, and includes the following steps:
s602: the application user successfully attaches to a session anchor point; this procedure can be seen in the 3GPP 23.502 protocol.
S604: the SMF monitors the management event of the AF subscription.
S606: the SMF sends a management event notification to the anchor UPF over the second capability open interface of the anchor UPF.
S608: and after receiving the management event notification, the anchor point UPF sends the management event notification to the AF through the capability open interface.
S610: the AF performs corresponding processing, such as server relocation, etc., upon receiving the management event notification.
S612: the AF sends traffic routing control information to the anchor point UPF carrying N6 port routing details for the new PSA.
S614: and the anchor point UPF sends the traffic routing control information to the SMF through the second capability open interface.
S616: the SMF adjusts the user plane traffic routing of the application user.
Example three:
the present embodiment provides a storage medium, in which one or more computer programs that can be read, compiled and executed by one or more processors are stored, and in the present embodiment, the storage medium may store at least one of a first traffic routing control program, a second traffic routing control program and a third traffic routing control program, where the first traffic routing control program can be used by one or more processors to execute a flow on an AF side implementing any one of the traffic routing control methods described in the foregoing embodiments. The second traffic routing control program may be used by one or more processors to execute a process of implementing any one of the traffic routing control methods described in the foregoing embodiments on the anchor UPF side. The third flow routing control program may be used for one or more processors to execute a process of implementing any one of the flow routing control methods SMF described in the foregoing embodiments.
The present embodiment further provides a network device, as shown in fig. 7: the network device 70 includes a processor 71, a memory 72, and a communication bus 73 for connecting the processor 71 and the memory 72, wherein the memory 72 may be the aforementioned storage medium storing at least one of the first flow routing control program, the second flow routing control program, and the third flow routing control program.
If the memory 72 is the storage medium storing the first traffic routing control program, the processor 71 may read the first traffic routing control program, compile and execute the flow on the AF side implementing the traffic routing control method described in the foregoing embodiment:
after determining that it is necessary to send traffic routing control information to the primary SMF, the processor 71 sends the traffic routing control information to the anchor UPF through the first capability open interface of the anchor UPF, so that the anchor UPF sends the traffic routing control information to the SMF through the second capability open interface of the anchor UPF.
In some examples of this embodiment, the application control management message includes any one of flow control information and routing control information, where the flow control information is used to request the SMF to manage the flow control rule of the application user; the routing control information is used to request the SMF to manage user plane traffic routing for the application user.
In some examples, the processor 71 may further send a management event subscription message to the SMF through the capability openinterface of the anchor UPF, the management event subscription message being used to request subscription of the at least one management event of the application user to the SMF.
Alternatively, in some examples, processor 71 may receive a management event notification sent by the SMF via a first capability open interface of the anchor UPF, the management event notification being received by the anchor UPF from the SMF via a second capability open interface of the anchor UPF; upon receiving the management event notification, processor 71 may determine that traffic routing control information needs to be sent to the SMF based on the management event notification.
For details of the method for implementing AF-side traffic routing by the processor 71 executing the first traffic routing control program, please refer to the description of the foregoing embodiments, which will not be described herein.
If the memory 72 is the storage medium storing the second traffic routing control program, the processor 71 may read the second traffic routing control program, compile and execute the process of implementing the traffic routing control method described in the foregoing embodiment on the anchor UPF side:
the processor 71 receives traffic routing control information sent by the AF through the first capability openness interface, and then sends the traffic routing control information to the SMF through the second capability openness interface.
In some examples of the present embodiment, the processor 71 receives the management event subscription message sent by the AF through the first capability open interface, and then the processor 71 sends the management event subscription message to the SMF through the second capability open interface.
Optionally, after the processor 71 sends the management event subscription message to the SMF through the second capability open interface of the processor, the processor may also receive a management event notification sent by the SMF through the second capability open interface; upon receiving the management event notification, the processor 71 sends the management event notification to the AF over the first capability openness interface.
In some examples, processor 71 may send traffic routing control information directly to the SMF over the second capability openinterface.
In other examples, the processor 71 may also send the traffic routing control information to the UPF as the branch point or the upstream classifier through the second capability openness interface, and then forward the traffic routing control information to the SMF by the UPF as the branch point or the upstream classifier.
For details of the method for implementing the UPF-side traffic routing control by the processor 71 executing the second traffic routing control program, please refer to the description of the foregoing embodiment, which is not described herein again.
If the memory 72 is the storage medium storing the third flow routing control program, the processor 71 may read the third flow routing control program, compile and execute the flow on the SMF side implementing the flow routing control method described in the foregoing embodiment:
the processor 71 receives traffic routing control information sent by the AF through the second capability open interface of the anchor UPF, and then manages traffic routing of the application user according to the traffic routing control information.
In some examples, when the processor 71 manages the traffic route of the application user according to the traffic route control information, if the traffic route control information is the flow control information, the processor 71 manages the flow control rule of the application user according to the flow control information. If the traffic routing control information is routing control information, processor 71 manages user plane traffic routing for the application user according to the routing control information.
Optionally, when the processor 71 receives the traffic routing control information sent by the AF through the second capability open interface of the anchor UPF, the processor may directly receive the traffic routing control information sent by the AF from the second capability open interface of the anchor UPF; the traffic routing control information may also be received from a UPF serving as a branch point or an uplink classifier, and the traffic routing control information is received from the AF by the anchor UPF through the first capability open interface and then sent to the UPF serving as the branch point or the uplink classifier through the second capability open interface.
In some examples of this embodiment, the processor 71 may further receive a management event subscription message sent by the AF through the second capability open interface of the anchor UPF, then monitor the management events subscribed by the management event subscription message, and send a management event notification to the anchor UPF through the second capability open interface after at least one management event subscribed by the management event subscription message occurs, so that the anchor UPF forwards the management event notification to the AF through the first capability open interface thereof.
For details of the method for implementing SMF-side flow route control by the processor 71 executing the third flow route control program, please refer to the description of the foregoing embodiments, which is not described herein again.
The embodiment also provides a network system, which includes an AF, an anchor UPF and an SMF, where the AF communicates with the anchor UPF through a first capability open interface of the anchor UPF, and the anchor UP may communicate with the SMF through a second capability open interface of the anchor UP.
The AF may be a network device that executes a first traffic routing control program for the processor 71 to implement an AF-side flow of the traffic routing control method. The anchor point UPF may be a network device that executes a second traffic routing control program for the processor 71 to implement a traffic routing control method and anchor point UPF side flow; the SMF may be a network device on the SMF side that implements the traffic routing control method by executing a third traffic routing control program by the processor 71.
The network device, the system and the storage medium provided by this embodiment enable AF and SMF to be implemented through an open capability interface thereof without passing through PCF when interacting, and because UPF is closer to an access point of an application user than PCF, it is beneficial to accelerate the transmission speed of traffic routing control information, and improve the efficiency of SMF in managing traffic routing of the application user, thereby reducing the perception of the application user on server switching and the like, and improving user experience.
It will be apparent to those skilled in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software (which may be implemented in program code executable by a computing device), firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed over computer-readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media), executed by a computing device, and in some cases may perform the steps shown or described in a different order than here. The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art. Thus, the present invention is not limited to any specific combination of hardware and software.
The foregoing is a more detailed description of embodiments of the present invention, and the present invention is not to be considered limited to such descriptions. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (15)
1. A traffic routing control method comprises the following steps:
an application function network element AF determines that a session management function network element SMF is required to be requested to manage the flow routing of an application user;
and the AF sends the flow routing control information to the SMF through a capability open interface of an anchor point user plane function network element (UPF), wherein the anchor point UPF is used as the UPF of a packet data unit session anchor Point (PSA) attached to the application user, and the capability open interface comprises a first capability open interface of the anchor point UPF interacting with the AF side and a second capability open interface of the anchor point UPF interacting with the SMF side.
2. The traffic routing control method according to claim 1, wherein the application control management message includes any one of traffic control information and routing control information, the traffic control information being used to request the SMF to manage the traffic control rule of the application user; the routing control information is used for requesting the SMF to manage the user plane traffic routing of the application user.
3. The traffic routing control method according to claim 1 or 2, characterized in that the traffic routing control method further comprises:
and the AF sends a management event subscription message to the SMF through a capability open interface of the anchor UPF, wherein the management event subscription message is used for requesting the SMF to subscribe at least one management event of the application user.
4. The traffic routing control method of claim 3, wherein the determining, by the AF, that the SMF needs to be requested to manage the traffic routing of the application user comprises:
the AF receives a management event notification sent by the SMF through a first capability open interface of the anchor UPF, and the management event notification is received by the anchor UPF from the SMF through a second capability open interface;
and the AF determines that the SMF is required to be requested to manage the traffic routing of the application user according to the management event notification.
5. A traffic routing control method comprises the following steps:
receiving, by an anchor point UPF, traffic routing control information sent by an AF through a first capability open interface, where the traffic routing control information is used to request the SMF to manage a traffic route of an application user, and the anchor point UPF is a UPF serving as a PSA to which the application user is attached;
and the anchor point UPF sends the flow routing control information to the SMF through a second capability open interface of the anchor point UPF.
6. The traffic routing control method according to claim 5, further comprising:
the anchor UPF receives a management event subscription message sent by the AF through the first capability open interface, wherein the management event subscription message is used for the AF to request the SMF to subscribe at least one management event of the application user;
and the anchor UPF sends the management event subscription message to the SMF through the second capability open interface of the anchor UPF.
7. The traffic routing control method according to claim 6, wherein after the anchor UPF sends the management event subscription message to the SMF through its second capability open interface, the method further comprises:
the anchor UPF receives the management event notification sent by the SMF through a second capability open interface of the anchor UPF;
and the anchor point UPF sends the management event notification to the AF through the first capability open interface.
8. The traffic routing control method of any of claims 5-7, wherein the anchor point UPF sending the traffic routing control information to the SMF over its second capability open interface comprises:
the anchor point UPF directly sends the flow routing control information to the SMF through a second capability open interface of the anchor point UPF;
or the like, or, alternatively,
and the anchor point UPF sends the traffic routing control information to a UPF serving as a branch point or an uplink classifier through a second capability open interface of the anchor point UPF, and the UPF serving as the branch point or the uplink classifier is used for forwarding the traffic routing control information to the SMF.
9. A traffic routing control method comprises the following steps:
the SMF receives traffic routing control information sent by the AF through a second capability open interface of an anchor point UPF, the traffic routing control information is received by the anchor point UPF from the AF through a first capability open interface of the SMF, and the anchor point UPF is a UPF serving as PSA (pressure sensitive adhesive) attached by an application user;
and the SMF manages the traffic routing of the application user according to the traffic routing control information.
10. The traffic routing control method of claim 9, wherein the SMF managing traffic routing for an application user according to the traffic routing control information comprises:
and if the flow routing control information is flow control information, the SMF manages the flow control rule of the application user according to the flow control information.
And if the traffic routing control information is routing control information, the SMF manages the user plane traffic routing of the application user according to the routing control information.
11. The traffic routing control method according to claim 9, wherein the receiving, by the SMF, the traffic routing control information sent by the AF through the second capability open interface of the anchor UPF includes:
the SMF directly receives the traffic routing control information sent by the AF from a second capability open interface of the anchor point UPF;
or the like, or, alternatively,
and the SMF receives traffic routing control information from a UPF (unified Power Filter) serving as a branch point or an uplink classifier, and the traffic routing control information is sent to the UPF serving as the branch point or the uplink classifier through the second capability open interface after being received from the AF through the first capability open interface by the anchor UPF.
12. The traffic routing control method according to any of claims 9 to 11, characterized in that the traffic routing control method comprises:
the SMF receives a management event subscription message sent by the AF through a second capability open interface of the anchor UPF;
the SMF monitors the management event subscribed by the management event subscription message;
and the SMF sends a management event notification to the anchor UPF through the second capability open interface after at least one management event subscribed by the management event subscription message occurs, wherein the anchor UPF is used for forwarding the management event notification to the AF through the first capability open interface.
13. A network device comprising a processor, a memory, and a communication bus;
the communication bus is used for realizing connection communication between the processor and the memory;
the processor is configured to execute a first traffic routing control program stored in the memory to implement the steps of the traffic routing control method according to any one of claims 1 to 4; or, the processor is configured to execute a second traffic routing control program stored in the memory to implement the steps of the traffic routing control method according to any one of claims 5 to 8; or, the processor is configured to execute a third flow routing control program stored in the memory to implement the steps of the flow routing control method according to any one of claims 9 to 12.
14. A network system is characterized in that the network system comprises an AF, an anchor point UPF and an SMF, wherein the AF communicates with the anchor point UPF through a first capability open interface of the anchor point UPF, and the anchor point UPF communicates with the SMF through a second capability open interface of the anchor point UPF; the AF is a network device in which the processor of claim 13 executes a first traffic routing control program to implement the traffic routing control method according to any one of claims 1 to 4; the anchor UPF is a network device in which the processor of claim 13 executes a second traffic routing control program to implement the traffic routing control method according to any one of claims 5 to 8; the SMF is a network device in which the processor of claim 13 executes a third flow routing control program to implement the flow routing control method according to any one of claims 9 to 12.
15. A storage medium storing at least one of a first traffic routing control program, a second traffic routing control program, and a third traffic routing control program, the first traffic routing control program being executable by one or more processors to implement the steps of the traffic routing control program method according to any one of claims 1 to 4; the second traffic routing control program being executable by one or more processors to implement the steps of the traffic routing control program method as claimed in any one of claims 5 to 8; the third traffic routing control program is executable by one or more processors to implement the steps of the traffic routing control program method according to any one of claims 9 to 12.
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