CN114039947B - 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; 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 allocates the user address according to the position information of the user, thereby improving service experience, reducing the configuration maintenance workload 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 allocation method, UPF, system, and storage medium.
Background
In the 5G architecture, the user plane is completely separated from the control plane. When a user creates a data session, the user address may be allocated by the control plane network element SMF (Session Management Function ) or by the user plane network element UPF (User Plane Function ) according to the 3GPP standard. The user plane addresses are essentially all of the UPFs, and when the SMFs and the UPFs are in a multi-to-multi deployment (i.e. one UPF is controlled by a plurality of SMFs) scene, if the SMFs are used for distributing the user addresses, the address pool of each UPF needs to be divided into a plurality of sub-address pools in advance and is configured in the SMFs in advance, so that the configuration and maintenance workload of the network is high, the statistical multiplexing rate of the IP addresses is reduced, and the utilization rate of the IP addresses is reduced. However, if the user address is allocated using the UPF, the UPF cannot allocate the user address based on the location information of the user, resulting in being not applicable to some scenarios requiring supervision control.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide a terminal address allocation method, UPF, system and storage medium.
According to a first aspect of the present disclosure, there is provided a terminal address allocation method, including: the 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; the information carried in the session establishment response message includes: and the IP address is allocated to the terminal.
Optionally, the assigning an IP address to the terminal based on the user location information includes: the UPF divides the 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 position information with the service position information, and determines target service position 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, acquires an idle IP address from the sub-address pool and distributes 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.
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 creation request, acquires user subscription parameters corresponding to the identification information of the terminal from a unified data management function (UDM), and verifies the terminal based on the user subscription parameters; 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, the terminal initiates 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 establishment 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 return module, configured to return a session establishment response message to the SMF; the information carried in the session establishment response message includes: and the IP address is allocated to the terminal.
Optionally, the address allocation module includes: the corresponding relation setting unit is used for dividing the IP address pool into a plurality of sub address pools and setting the corresponding relation between the sub address pools and the service position information; an address acquisition unit for matching the user location information with the service location information and determining target service location 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 to be distributed 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 establishment 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 comprising: AMF, SMF, and UPF as described above.
Optionally, the SMF is configured to receive a PDU session creation request sent by the AMF, obtain, according to the PDU session creation request, identification information of the terminal, and obtain, from a unified data management function UDM, a user subscription parameter corresponding to the identification information of the terminal; 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, the terminal initiates 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 perform the steps of the method as described above.
According to the terminal address allocation method, the UPF, the system and the storage medium, the problem that the current UPF cannot allocate the IP address according to the position information of the user is solved, the position information of the user is added in the session establishment request message sent by the SMF to the UPF, the UPF allocates the user address according to the position information of the user, service experience can be improved, the configuration maintenance workload of the 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 solutions in the prior art, a brief description will be given below of the drawings required for the embodiments or the description of the prior art, it being obvious that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a flow diagram of one embodiment of a terminal address assignment method according to the present disclosure;
fig. 2 is a flow chart illustrating another embodiment of a terminal address assignment method according to the present disclosure;
fig. 3 is a schematic message interaction flow diagram of yet another embodiment of a terminal address assignment method according to the present disclosure;
FIG. 4 is a block diagram of one embodiment of a UPF in accordance with the present disclosure;
FIG. 5 is a block diagram of an address assignment module in one embodiment of a UPF in accordance with the present disclosure;
FIG. 6 is a block diagram of another embodiment of a UPF in accordance with 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 following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without making any inventive effort are within the scope of protection of this disclosure.
The following "first", "second", etc. are used merely to describe differences and are not otherwise specifically meant.
Fig. 1 is a flow chart illustrating an embodiment of a terminal address allocation method according to the present disclosure, as shown in fig. 1:
step 101, the upf receives a session establishment request message sent by the SMF.
The session establishment request message may be various, for example, PFCP (Packet Forward Control Protocol, packet forwarding control protocol) session establishment request message, or the like.
Step 102, the upf extracts the 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 terminal can be a mobile phone, a tablet computer and the like.
Step 103, the UPF returns a session establishment response message to the SMF; the information carried in the session establishment response message includes: an IP address assigned to the terminal.
The terminal address allocation method aims at the problem that the current UPF cannot allocate an IP address according to the position information of the user, and provides a method for allocating the user terminal address of the 5G core network 5GC, wherein the position information of the user is added in a session establishment request message sent by the SMF to the UPF, and the UPF allocates the user address according to the position information of the user, so that service experience can be improved; compared with the prior art that the SMF distributes the IP address according to the user position information, the configuration maintenance workload of the network can be reduced, and the utilization rate of the IP address is improved.
In one embodiment, assigning an IP address to a terminal based on user location information may employ a variety of methods. For example, the UPF divides the IP address pool into a plurality of sub address pools, and the UPF sets a correspondence relationship between the sub address pools and service location information. The user location information includes identification information of the first tracking area TA (Tracking Area), etc., and the service location information includes identification information of the second tracking area TA, etc.
The UPF matches the user position information with the service position information, determines target service position information based on the matching result, acquires a sub-address pool corresponding to the target service position information according to the corresponding relation, acquires an idle IP address from the sub-address pool and distributes the idle IP address to the terminal.
In one embodiment, the UPF pre-configures the correspondence between the sub-address pool and the service location information, which may use TA identification. When a PDU (Packet Data Unit) session is created, the terminal requests to establish the PDU session, and the SMF carries user location information (TA identifier) in a PFCP session establishment request message sent to the UPF. 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 service position information, and distributes an IP address for the user terminal from the address pool so as to complete the PDU session establishment flow.
After the terminal is successfully registered, the terminal initiates a PDU session creation request to the AMF, and the AMF forwards the PDU session creation request to the SMF. The SMF receives the PDU session creation request sent by the access and mobility management function AMF, the SMF obtains the identification information of the terminal according to the PDU session creation request, obtains the user subscription parameter corresponding to the identification information of the terminal from the unified data management function UDM (Unified Data Management), and verifies the terminal based on the user subscription parameter, and can verify the terminal based on the user subscription parameter by using the existing terminal verification method. The identification information of the terminal may be a mobile phone number or 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 DNN of the current session; the PDU session establishment request message sent from the AMF to the SMF carries the location information of the current terminal and the DNN of the current session. The SMF acquires a data network name DNN corresponding to the terminal from the PDU session establishment request message, and determines UPF according to the DNN and the user position information; the SMF sends a session setup request message carrying user location information to the UPF. The SMF may obtain the user subscription parameters and DNN from the UDM using a variety of existing methods, and determine the UPF based on the DNN and the user location information.
Fig. 2 is a flow chart illustrating another embodiment of a terminal address allocation method according to the present disclosure, as shown in fig. 2:
step 201, the upf configures a correspondence between the address pool and the location information.
The UPF divides an IP address pool maintained by the UPF into a plurality of sub address pools, each sub address pool is respectively provided with corresponding service position (Area) information, a corresponding relation is established, and the service position information can be identified by a TA (tracking Area).
Step 202, the user terminal requests to establish a PDU session.
After successful registration, the user terminal initiates a PDU session creation request. The AMF (Access and Mobility Management Function ) selects one SMF after receiving the PDU session creation request message and forwards the PDU session creation request message to the SMF. AMF selection SMF can utilize a variety of existing selection methods.
In step 203, the smf sends a PFCP session establishment request to the UPF, where the PFCP session establishment request carries user location information.
The SMF selects one UPF according to the PDU session creation request information and sends a PFCP session creation request message to the UPF, wherein the PFCP session creation request message carries user location information which can be identified by TA. The SMF sends a PFCP session establishment request message carrying the user location information to the UPF, and the SMF may acquire the user location information from the user location information using existing various methods, and the SMF selects the UPF using existing various selection methods.
In step 204, the upf allocates an IP address to the user terminal according to the user location information.
The UPF determines a matched sub-address pool according to the corresponding relationship between the sub-address pool and the location information pre-configured in step 201 according to the user location information carried in the received PFCP session establishment request message, and allocates an idle IP address to the user terminal from the sub-address pool.
Step 205, the PDU session establishment procedure is completed.
The UPF returns a PCFP session establishment response message to the SMF, wherein the PCFP session establishment response message carries the IP address allocated 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 may be accomplished using a variety of methods available.
Fig. 3 is a schematic message interaction flow diagram of still another embodiment of a terminal address allocation method according to the present disclosure, as shown in fig. 3:
in step 301, the upf pre-configures the correspondence 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 a correspondence between the sub address pool 1 and the service location information TA1, and a correspondence between the sub address pool 2 and the service location information TA2, respectively.
In step 302, the user successfully registers at 5 GC.
Step 303, the user initiates a PDU session establishment request.
At step 304, the AMF discovers and selects the SMF. The AMF searches for and selects an appropriate SMF based on the DNN (Data Network Name ), user location, etc. information to the NRF (Network Repository Function ).
The amf forwards the PDU session establishment request to the SMF, step 305.
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 DNN, user location information, and the like.
Step 308, the smf sends a PFCP session setup request (carrying TA) to the UPF. For example, the SMF sends a PFCP session establishment request to the UPF, where the PFCP session establishment request carries current location information (e.g. TA 2) of the user.
In step 309, the upf assigns an IP address to the user according to TA (user location information).
The UPF matches the user position information T2 with the service position information, determines the target service position information T2 based on the matching result, acquires the sub-address pool 2 corresponding to the target service position information T2 according to the corresponding relation between the sub-address pool and the service position information, and acquires an idle IP address from the sub-address pool 2 to be distributed to the terminal.
Step 310, the upf returns a PFCP session establishment answer (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 allocated to the terminal.
Step 311, the subsequent PDU session creation procedure 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 allocating module 42, and a response returning 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 return module 43 returns a session establishment response message to the SMF; 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 acquisition unit 422. The correspondence setting unit 421 divides the IP address pool into a plurality of sub address pools, sets correspondence between the sub address pools and the service location information. The address acquisition 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 acquisition unit 422 acquires a sub-address pool corresponding to the target service location information according to the correspondence relation, acquires an empty IP address from the sub-address pool, and allocates the empty IP address to the terminal.
The user position information includes identification information of the first tracking area TA, etc.; the service location information includes identification information of the second tracking area TA, etc.; the session establishment request message includes a PFCP session establishment request message, etc.
Fig. 6 is a block diagram of yet another embodiment of a UPF in accordance with 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, and 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, or the memory 61 may be a memory array. The memory 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 (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the terminal address assignment methods of the present disclosure.
In one embodiment, as shown in fig. 7, the present disclosure provides a communication network system comprising an AMF 71, an SMF 72, and a UPF 73 in any of the above embodiments. The communication network system may be a 5GC network or the like. After successful registration, the terminal initiates a PDU session creation request to the AMF 71; AMF 71 forwards the PDU session creation request to SMF 72.
The SMF 72 receives the PDU session creation request sent by the AMF 71, obtains the identification information of the terminal according to the PDU session creation request, obtains the user subscription parameter corresponding to the identification information of the terminal from the unified data management function UDM, and verifies the terminal based on the user subscription parameter. The SMF 72 acquires the data network name DNN and 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 that, when executed by a processor, implement the terminal address allocation method according to any of the above embodiments.
According to the terminal address allocation method, the UPF, the system and the storage medium provided by the embodiment, aiming at the problem that the current UPF cannot allocate the IP address according to the position information of the user, the position information of the user is added in the session establishment request message sent by the SMF to the UPF, 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 maintenance workload of the network can be reduced, and the utilization rate of the IP address can be improved.
It will be apparent to those skilled in the art that 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, etc.) 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 flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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. In order to avoid obscuring the concepts of the present disclosure, some details known in the art are not described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The methods and systems 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, firmware. The above-described sequence of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the sequence specifically described above unless specifically stated otherwise. Furthermore, in some embodiments, the present disclosure may also be implemented 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 those of ordinary skill in the art. The embodiments were 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 (12)
1. A terminal address allocation method, comprising:
the user plane function UPF receives a session establishment request message sent by a session management function SMF;
the UPF extracts user location information corresponding to a terminal from the session establishment request message, assigns an IP address to the terminal based on the user location information, and includes:
the UPF divides the 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 position information with the service position information, and determines target service position information based on a matching result; the UPF acquires a sub-address pool corresponding to the target service position information according to the corresponding relation, acquires an idle IP address from the sub-address pool and distributes the idle IP address to the terminal;
the UPF returns a session establishment response message to the SMF; the information carried in the session establishment response message includes: and the IP address is allocated to the terminal.
2. The method of claim 1, 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.
3. The method of claim 1, further comprising:
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 creation request, acquires user subscription parameters corresponding to the identification information of the terminal from a unified data management function (UDM), and verifies the terminal based on the user subscription parameters;
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.
4. A method as in claim 3, further comprising:
after the terminal is successfully registered, initiating the PDU session creation request to the AMF;
the AMF forwards the PDU session creation request to the SMF.
5. The method according to claim 1 to 4, wherein,
the session establishment request message includes: PFCP session establishment request message.
6. 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;
wherein, the address allocation module includes:
the corresponding relation setting unit is used for dividing the IP address pool into a plurality of sub address pools and setting the corresponding relation between the sub address pools and the service position information;
an address acquisition unit for matching the user location information with the service location information and determining target service location information based on a matching result; acquiring a sub-address pool corresponding to the target service position information according to the corresponding relation, acquiring an idle IP address from the sub-address pool and distributing the idle IP address to the terminal;
a response return module, configured to return a session establishment response message to the SMF; the information carried in the session establishment response message includes: and the IP address is allocated to the terminal.
7. The UPF of claim 6, wherein the user location information comprises: 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 establishment request message.
8. A UPF, comprising:
a memory; and a processor coupled to the memory, the processor configured to perform the method of any of claims 1-2 based on instructions stored in the memory.
9. A communication network system, comprising:
AMF, SMF and UPF according to any of claims 6 to 8.
10. The system of claim 9, 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 user subscription parameters corresponding to the identification information of the terminal from a unified data management function (UDM), and checking the terminal based on the user subscription parameters; 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.
11. The system of claim 10, wherein,
after the terminal is successfully registered, initiating the PDU session creation request to the AMF; the AMF forwards the PDU session creation request to the SMF.
12. 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 of claims 1 to 5.
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| CN114827908B (en) * | 2022-04-06 | 2023-06-30 | 中国联合网络通信集团有限公司 | VN group communication method, device, equipment and storage medium |
| CN114900499B (en) * | 2022-04-20 | 2023-10-03 | 中国电信股份有限公司 | IP address allocation method, device, equipment and storage medium |
| 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 |
| 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 |
| CN115086276B (en) * | 2022-07-14 | 2023-04-25 | 中国联合网络通信集团有限公司 | Address management method, device, equipment and system |
| CN117641434A (en) * | 2022-08-15 | 2024-03-01 | 中国电信股份有限公司 | Relay service method, relay node, network device, and storage medium |
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