CN114039947A - Terminal address allocation method, UPF, system and storage medium - Google Patents
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Abstract
The invention provides a terminal address allocation method, a UPF, a system and a storage medium, wherein the method comprises the following steps: the UPF receives a session establishment request message sent by the SMF; the UPF extracts user position information corresponding to the terminal from the session establishment request message, and allocates an IP address to the terminal based on the user position information; the UPF returns a session establishment response message to the SMF; wherein, the information carried in the session establishment response message includes: an IP address assigned to the terminal. The method, the UPF, the system and the storage medium of the invention increase the position information of the user in the session establishment request message sent by the SMF to the UPF, and the UPF carries out the user address allocation according to the position information of the user, thereby improving the service experience, reducing the workload of the configuration and maintenance of the network and improving the utilization rate of the IP address.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a terminal address assignment method, a UPF, a system, and a storage medium.
Background
In the 5G architecture, the user plane and the control plane are completely separated. When a User creates a data Session, according to the 3GPP standard, a User address may be allocated by a control Plane network element SMF (Session Management Function), or may be allocated by a User Plane network element UPF (User Plane Function). The user plane addresses are essentially owned by the UPF, and when the SMF and the UPF are deployed in many-to-many (that is, one UPF is controlled by a plurality of SMFs at the same time), if the SMF is used to allocate the user addresses, the address pool of each UPF needs to be divided into a plurality of sub-address pools in advance and configured in the SMF in advance, which results in large workload of network configuration and maintenance, reduced statistical reuse rate of IP addresses, and reduced utilization rate of IP addresses. However, if the user address is allocated by using the UPF, the UPF cannot allocate the user address based on the location information of the user, so that the UPF cannot be applied to some scenes in which the supervision control is required.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a terminal address allocation method, a UPF, a system and a storage medium.
According to a first aspect of the present disclosure, there is provided a terminal address allocation method, including: a user plane function UPF receives a session establishment request message sent by a session management function SMF; the UPF extracts user position information corresponding to a terminal from the session establishment request message, and allocates an IP address to the terminal based on the user position information; the UPF returns a session establishment response message to the SMF; wherein, the information carried in the session establishment response message includes: and allocating the IP address to the terminal.
Optionally, the allocating an IP address to the terminal based on the user location information includes: the UPF divides an IP address pool into a plurality of sub-address pools; the UPF sets the corresponding relation between the sub-address pool and the service position information; the UPF matches the user location information with the service location information and determines target service location information based on a matching result; and the UPF acquires a sub-address pool corresponding to the target service position information according to the corresponding relation, and acquires a free IP address from the sub-address pool and distributes the free IP address to the terminal.
Optionally, the user location information includes: identification information of the first tracking area TA; the service location information includes: identification information of the second tracking area TA.
Optionally, the SMF receives a PDU session creation request sent by an access and mobility management function, AMF; the SMF acquires the identification information of the terminal according to the PDU session establishment request, acquires a user signing parameter corresponding to the identification information of the terminal from a unified data management function (UDM), and verifies the terminal based on the user signing parameter; the SMF acquires a data network name DNN and the user position information corresponding to the terminal, and determines the UPF according to the DNN and the user position information; and the SMF sends the session establishment request message carrying the user position information to the UPF.
Optionally, after the terminal successfully registers, initiating the PDU session creation request to the AMF; the AMF forwards the PDU session creation request to the SMF.
Optionally, the session establishment request message includes: PFCP session setup request message.
According to a second aspect of the present disclosure, there is provided a user plane function UPF, comprising: a request receiving module, configured to receive a session establishment request message sent by a session management function SMF; an address allocation module, configured to extract user location information corresponding to a terminal from the session establishment request message, and allocate an IP address to the terminal based on the user location information; a response returning module, configured to return a session establishment response message to the SMF; wherein, the information carried in the session establishment response message includes: and allocating the IP address to the terminal.
Optionally, the address allocation module includes: a corresponding relation setting unit, configured to divide an IP address pool into a plurality of sub-address pools, and set a corresponding relation between the sub-address pools and service location information; the address acquisition unit is used for matching the user position information with the service position information and determining target service position information based on a matching result; and acquiring a sub-address pool corresponding to the target service position information according to the corresponding relation, and acquiring an idle IP address from the sub-address pool and distributing the idle IP address to the terminal.
Optionally, the user location information includes: identification information of the first tracking area TA; the service location information includes: identification information of the second tracking area TA; the session establishment request message includes: PFCP session setup request message.
According to a third aspect of the present disclosure, there is provided a UPF comprising: a memory; and a processor coupled to the memory, the processor configured to perform the method as described above based on instructions stored in the memory.
According to a fourth aspect of the present disclosure, there is provided a communication network system including: AMF, SMF and UPF as described above.
Optionally, the SMF is configured to receive a PDU session creation request sent by the AMF, obtain identification information of the terminal according to the PDU session creation request, and obtain a user subscription parameter corresponding to the identification information of the terminal from a unified data management function UDM; and acquiring a data network name DNN and the user position information corresponding to the terminal, determining the UPF according to the DNN and the user position information, and sending the session establishment request message carrying the user position information to the UPF.
Optionally, after the terminal successfully registers, initiating the PDU session creation request to the AMF; the AMF forwards the PDU session creation request to the SMF.
According to a fifth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer program instructions which, when executed by one or more processors, implement the steps of the method as described above.
The terminal address allocation method, the UPF, the system and the storage medium disclosed by the invention have the advantages that the position information of the user is added in the session establishment request message sent by the SMF to the UPF aiming at the problem that the UPF can not allocate the IP address according to the position information of the user at present, and the UPF allocates the user address according to the position information of the user, so that the service experience can be improved, the configuration and maintenance workload of a network is reduced, and the utilization rate of the IP address is improved.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without inventive exercise.
Fig. 1 is a schematic flowchart of an embodiment of a terminal address allocation method according to the present disclosure;
fig. 2 is a schematic flowchart of another embodiment of a terminal address allocation method according to the present disclosure;
fig. 3 is a message interaction flow diagram of a terminal address assignment method according to yet another embodiment of the present disclosure;
FIG. 4 is a block diagram of one embodiment of a UPF according to the present disclosure;
FIG. 5 is a block diagram of an address assignment module in one embodiment of a UPF according to the present disclosure;
FIG. 6 is a block diagram of another embodiment of a UPF according to the present disclosure;
fig. 7 is a block diagram of one embodiment of a communication network system according to the present disclosure.
Detailed Description
The present disclosure now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the disclosure are shown. The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The terms "first", "second", and the like are used hereinafter only for descriptive distinction and not for other specific meanings.
Fig. 1 is a schematic flowchart of an embodiment of a terminal address allocation method according to the present disclosure, as shown in fig. 1:
in step 101, the UPF receives a session establishment request message sent by the SMF.
The session establishment request message may be in various forms, such as a PFCP (Packet Forward Control Protocol) session establishment request message.
The terminal address allocation method disclosed by the invention aims at the problem that the UPF can not allocate the IP address according to the position information of the user at present, and provides a method for allocating the user terminal address of the 5G core network 5 GC; compared with the prior art that the SMF allocates the IP address according to the user position information, the configuration and maintenance workload of the network can be reduced, and the utilization rate of the IP address is improved.
In one embodiment, a plurality of methods may be employed to assign an IP address to a terminal based on user location information. For example, the UPF divides an IP address pool into a plurality of sub-address pools, and sets a correspondence between the sub-address pools and service location information. The user location information includes identification information of the first tracking area TA (tracking area) and the like, and the service location information includes identification information of the second tracking area TA and the like.
And the UPF matches the user position information with the service position information, determines target service position information based on a matching result, acquires a sub-address pool corresponding to the target service position information according to the corresponding relation, and acquires a free IP address from the sub-address pool to allocate the free IP address to the terminal.
In one embodiment, the UPF pre-configures the correspondence between the subaddress pool and the service location information, which may use TA identification. When creating a PDU (Packet Data Unit) session, a terminal requests to establish the PDU session, and a PFCP session establishment request message sent by an SMF to a UPF carries user location information (TA identity). And the UPF selects a proper sub-address pool for the user according to the corresponding relation between the received user position information and the pre-configured sub-address pool and the service position information, and allocates an IP address for the user terminal from the address pool so as to complete the PDU session establishment process.
And after the terminal is successfully registered, initiating a PDU session creation request to the AMF, and forwarding the PDU session creation request to the SMF by the AMF. The SMF receives a PDU session creation request sent by an access and mobility management function AMF, the SMF acquires identification information of a terminal according to the PDU session creation request, acquires user signing parameters corresponding to the identification information of the terminal from a unified Data management function UDM (unified Data management), and the SMF verifies the terminal based on the user signing parameters, so that the terminal can be verified based on the user signing parameters by using the existing terminal verification method. The identification information of the terminal can be a mobile phone number and the like.
The user terminal sends a PDU session establishment request to the AMF, wherein the PDU session establishment request carries the position information of the current terminal and the DNN of the session; the PDU session establishment request message sent by the AMF to the SMF carries the location information of the current terminal and the DNN of the session. The SMF acquires a data network name DNN corresponding to the terminal from the PDU session establishment request message, and determines a UPF according to the DNN and the user position information; and the SMF sends a session establishment request message carrying the user position information to the UPF. The SMF can acquire user subscription parameters and DNN from the UDM by using various existing methods, and determine UPF according to the DNN and user location information.
Fig. 2 is a schematic flowchart of another embodiment of a terminal address allocation method according to the present disclosure, as shown in fig. 2:
The UPF divides an IP address pool maintained by itself into a plurality of sub-address pools, each sub-address pool sets service location (Area) information corresponding to the sub-address pool, and establishes a corresponding relationship, and the service location information can be identified by a TA (tracking Area).
In step 202, the user terminal requests the establishment of a PDU session.
And after the user terminal is successfully registered, initiating a PDU session establishment request. The AMF (Access and Mobility Management Function) selects an SMF after receiving the PDU session creation request message, and forwards the PDU session creation request message to the SMF. Selection of SMF by AMF may utilize a variety of existing selection methods.
The SMF selects one UPF according to the PDU session establishment request information and sends a PFCP session establishment request message to the UPF, wherein the PFCP session establishment request message carries user position information, and the user position information can be identified by TA. The SMF sends a PFCP session establishment request message carrying the user position information to the UPF, the SMF can acquire the user position information by using various existing methods, and the SMF selects the UPF by using various existing selection methods.
And step 204, the UPF allocates an IP address to the user terminal according to the user position information.
The UPF determines a matched sub-address pool according to the user location information carried in the received PFCP session establishment request message and according to the correspondence between the sub-address pool and the location information pre-configured in step 201, and allocates an idle IP address for the user terminal from the sub-address pool.
And the UPF returns a PCFP session establishment response message to the SMF, wherein the PCFP session establishment response message carries the IP address distributed for the user terminal. And then, the UPF and the like cooperate with the network to complete the PDU session establishment flow of the user terminal. The PDU session establishment procedure can be accomplished using a variety of existing methods.
Fig. 3 is a schematic message interaction flow diagram of a terminal address assignment method according to another embodiment of the present disclosure, as shown in fig. 3:
step 301, the UPF pre-configures the corresponding relationship between each sub-address pool and the location information.
For example, the UPF divides the IP address pool into two sub address pools, and the UPF sets the correspondence between the sub address pool 1 and the service location information TA1, and the correspondence between the sub address pool 2 and the service location information TA2, respectively.
At step 302, the user successfully registers at 5 GC.
Step 303, the user initiates a PDU session setup request.
At step 304, the AMF discovers and selects an SMF. The AMF searches and selects a suitable SMF according to information such as DNN (Data Network Name), user location, etc. to NRF (Network Repository Function).
At step 305, the AMF forwards the PDU session setup request to the SMF.
In step 306, the SMF accesses the UDM to obtain the user subscription parameters.
In step 307, the SMF selects a UPF. For example, the SMF selects an appropriate UPF based on the DNN, user location information, etc.
In step 308, the SMF sends a PFCP session establishment request (carrying the TA) to the UPF. For example, the SMF sends a PFCP session establishment request to the UPF, where the PFCP session establishment request carries the current location information of the user (for example, TA 2).
In step 309, the UPF assigns an IP address to the user according to the TA (user location information).
The UPF matches the user location information T2 with the service location information, determines target service location information T2 based on the matching result, acquires the subaddress pool 2 corresponding to the target service location information T2 according to the corresponding relation between the subaddress pool and the service location information, and acquires a free IP address from the subaddress pool 2 to allocate to the terminal.
At step 310, the UPF returns a PFCP session setup response (carrying the UE IP address) to the SMF.
For example, the UPF returns a PFCP session establishment response message to the SMF, where the PFCP session establishment response message carries the IP address assigned to the terminal.
Step 311, the subsequent PDU session creation process is completed.
In one embodiment, as shown in FIG. 4, the present disclosure provides a user plane function UPF40 including a request receiving module 41, an address assignment module 42, and a response return module 43. The request receiving module 41 receives a session establishment request message sent by the SMF. The address assignment module 42 extracts user location information corresponding to the terminal from the session establishment request message, and assigns an IP address to the terminal based on the user location information. The response returning module 43 returns a session establishment response message to the SMF; wherein, the information carried in the session establishment response message includes: an IP address assigned to the terminal.
In one embodiment, as shown in fig. 5, the address allocation module 42 includes a correspondence setting unit 421 and an address obtaining unit 422. The correspondence setting unit 421 divides the IP address pool into a plurality of sub-address pools, and sets a correspondence between the sub-address pools and the service location information. The address obtaining unit 422 matches the user location information with the service location information, and determines target service location information based on the matching result; the address obtaining unit 422 obtains a sub-address pool corresponding to the target service location information according to the corresponding relationship, and obtains a free IP address from the sub-address pool to allocate to the terminal.
The user location information includes identification information of the first tracking area TA, and the like; the service location information includes identification information of the second tracking area TA, and the like; the session establishment request message includes a PFCP session establishment request message and the like.
Fig. 6 is a block diagram of yet another embodiment of a UPF according to the present disclosure. As shown in fig. 6, the apparatus may include a memory 61, a processor 62, a communication interface 63, and a bus 64. The memory 61 is used for storing instructions, the processor 62 is coupled to the memory 61, and the processor 62 is configured to implement the terminal address allocation method described above based on the instructions stored in the memory 61.
The memory 61 may be a high-speed RAM memory, a nonvolatile memory (NoN-volatile memory), or the like, and the memory 61 may be a memory array. The storage 61 may also be partitioned and the blocks may be combined into virtual volumes according to certain rules. The processor 62 may be a central processing unit CPU, or an application Specific Integrated circuit asic, or one or more Integrated circuits configured to implement the terminal address assignment method disclosed herein.
In one embodiment, as shown in fig. 7, the present disclosure provides a communication network system including an AMF 71, an SMF 72, and a UPF 73 as in any one of the above embodiments. The communication network system may be a 5GC network or the like. After the terminal is successfully registered, initiating a PDU session establishment request to the AMF 71; the AMF 71 forwards the PDU session creation request to the SMF 72.
The SMF 72 receives a PDU session creation request sent by the AMF 71, acquires identification information of a terminal according to the PDU session creation request, acquires a user signing parameter corresponding to the identification information of the terminal from a unified data management function (UDM), and verifies the terminal based on the user signing parameter. The SMF 72 acquires the data network name DNN and the user location information corresponding to the terminal, determines the UPF 73 according to the DNN and the user location information, and sends a session establishment request message carrying the user location information to the UPF 73.
In one embodiment, the present disclosure also provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer instructions, when executed by a processor, implement the terminal address allocation method according to any of the above embodiments.
The terminal address allocation method, the UPF, the system, and the storage medium provided in the embodiments above are directed to the problem that the UPF cannot allocate an IP address according to the location information of the user at present, where the location information of the user is added to the session establishment request message sent by the SMF to the UPF, and the UPF performs user address allocation according to the location information of the user, so that service experience can be improved, workload of configuration and maintenance of a network is reduced, and the utilization rate of the IP address is improved.
As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method and system of the present disclosure may be implemented in a number of ways. For example, the methods and systems of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
The description of the present disclosure has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the disclosure in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the disclosure and the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (14)
1. A terminal address allocation method comprises the following steps:
a user plane function UPF receives a session establishment request message sent by a session management function SMF;
the UPF extracts user position information corresponding to a terminal from the session establishment request message, and allocates an IP address to the terminal based on the user position information;
the UPF returns a session establishment response message to the SMF; wherein, the information carried in the session establishment response message includes: and allocating the IP address to the terminal.
2. The method of claim 1, the allocating an IP address for the terminal based on the user location information comprising:
the UPF divides an IP address pool into a plurality of sub-address pools;
the UPF sets the corresponding relation between the sub-address pool and the service position information;
the UPF matches the user location information with the service location information and determines target service location information based on a matching result;
and the UPF acquires a sub-address pool corresponding to the target service position information according to the corresponding relation, and acquires a free IP address from the sub-address pool and distributes the free IP address to the terminal.
3. The method of claim 2, wherein,
the user location information includes: identification information of the first tracking area TA; the service location information includes: identification information of the second tracking area TA.
4. The method of claim 1, further comprising:
the SMF receives a PDU session establishment request sent by an access and mobility management function (AMF);
the SMF acquires the identification information of the terminal according to the PDU session establishment request, acquires a user signing parameter corresponding to the identification information of the terminal from a unified data management function (UDM), and verifies the terminal based on the user signing parameter;
the SMF acquires a data network name DNN and the user position information corresponding to the terminal, and determines the UPF according to the DNN and the user position information;
and the SMF sends the session establishment request message carrying the user position information to the UPF.
5. The method of claim 4, further comprising:
after the terminal is successfully registered, initiating the PDU session establishment request to the AMF;
the AMF forwards the PDU session creation request to the SMF.
6. The method of any one of claims 1 to 5,
the session establishment request message includes: PFCP session setup request message.
7. A user plane function, UPF, comprising: :
a request receiving module, configured to receive a session establishment request message sent by a session management function SMF;
an address allocation module, configured to extract user location information corresponding to a terminal from the session establishment request message, and allocate an IP address to the terminal based on the user location information;
a response returning module, configured to return a session establishment response message to the SMF; wherein, the information carried in the session establishment response message includes: and allocating the IP address to the terminal.
8. The UPF of claim 7, wherein,
the address allocation module comprises:
a corresponding relation setting unit, configured to divide an IP address pool into a plurality of sub-address pools, and set a corresponding relation between the sub-address pools and service location information;
the address acquisition unit is used for matching the user position information with the service position information and determining target service position information based on a matching result; and acquiring a sub-address pool corresponding to the target service position information according to the corresponding relation, and acquiring an idle IP address from the sub-address pool and distributing the idle IP address to the terminal.
9. The UPF of claim 8, wherein,
the user location information includes: identification information of the first tracking area TA; the service location information includes: identification information of the second tracking area TA;
the session establishment request message includes: PFCP session setup request message.
10. A UPF, comprising:
a memory; and a processor coupled to the memory, the processor configured to perform the method of any of claims 1-3 based on instructions stored in the memory.
11. A communication network system comprising:
AMF, SMF and UPF according to any of claims 7 to 10.
12. The system of claim 11, wherein,
the SMF is used for receiving a PDU session creation request sent by the AMF, acquiring the identification information of the terminal according to the PDU session creation request, acquiring a user signing parameter corresponding to the identification information of the terminal from a unified data management function (UDM), and verifying the terminal based on the user signing parameter; and acquiring a data network name DNN and the user position information corresponding to the terminal, determining the UPF according to the DNN and the user position information, and sending the session establishment request message carrying the user position information to the UPF.
13. The system of claim 12, wherein,
after the terminal is successfully registered, initiating the PDU session establishment request to the AMF; the AMF forwards the PDU session creation request to the SMF.
14. A computer readable storage medium having stored thereon computer program instructions which, when executed by one or more processors, implement the steps of the method of any one of claims 1 to 6.
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| CN114598682A (en) * | 2022-04-26 | 2022-06-07 | 中国电信股份有限公司 | User address allocation method, device and system |
| CN114827908A (en) * | 2022-04-06 | 2022-07-29 | 中国联合网络通信集团有限公司 | VN group communication method, device, equipment and storage medium |
| CN114900499A (en) * | 2022-04-20 | 2022-08-12 | 中国电信股份有限公司 | IP address allocation method, device, equipment and storage medium |
| CN114980075A (en) * | 2022-05-05 | 2022-08-30 | 中国电信股份有限公司 | Address allocation method, session management function entity and communication system |
| CN115086276A (en) * | 2022-07-14 | 2022-09-20 | 中国联合网络通信集团有限公司 | Address management method, device, equipment and system |
| WO2024037502A1 (en) * | 2022-08-15 | 2024-02-22 | 中国电信股份有限公司 | Relay service method, relay node, network side, network device, and storage medium |
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