CN113840350A - Path optimization method, entity and system for 5G core network and storage medium - Google Patents
Path optimization method, entity and system for 5G core network and storage medium Download PDFInfo
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Abstract
The present disclosure relates to a path optimization method, entity and system, and storage medium for a 5G core network. The path optimization method for the 5G core network comprises the following steps: a user plane functional entity acquires link state information; the user plane functional entity sends the link state information to the session management functional entity; the session management functional entity determines the optimal forwarding path of the user plane functional entity according to the link state information; and the session management functional entity issues the optimal forwarding path to the user plane functional entity for execution. The present disclosure may optimize a data forwarding path using link state information in a mobile core network.
Description
Technical Field
The present disclosure relates to the field of data communications, and in particular, to a path optimization method, an entity, a system, and a storage medium for a 5G core network.
Background
A plurality of UPFs (User Plane Function entities) exist in a 5G core network, each PDU (Protocol Data Unit) session may have a plurality of UPF forwarding paths, and how to select an UPF forwarding path is an important problem, and the performance of the entire system is affected by the quality of a path selection method.
Disclosure of Invention
In view of at least one of the above technical problems, the present disclosure provides a path optimization method, entity and system, and a storage medium for a 5G core network, which can optimize a data forwarding path using link state information in a mobile core network.
According to an aspect of the present disclosure, there is provided a path optimization method for a 5G core network, including:
a user plane functional entity acquires link state information;
the user plane functional entity sends the link state information to the session management functional entity;
the session management functional entity determines the optimal forwarding path of the user plane functional entity according to the link state information;
and the session management functional entity issues the optimal forwarding path to the user plane functional entity for execution.
In some embodiments of the present disclosure, the method for path optimization for a 5G core network further includes:
the session management functional entity issues a link acquisition instruction to the user plane functional entity;
and under the condition of receiving the link acquisition instruction, the user plane functional entity acquires link state information.
In some embodiments of the present disclosure, the issuing, by the session management functional entity, the link acquisition instruction to the user plane functional entity includes:
a session management functional entity adds a link state bit in a PFCP (Packet Forwarding Control Protocol) message to enable the link state bit;
and the session management functional entity issues the PFCP message as a link acquisition instruction to the user plane functional entity.
In some embodiments of the present disclosure, in the case that the link acquisition instruction is received, the obtaining, by the user plane functional entity, link state information includes:
after receiving the PFCP message, the user plane functional entity analyzes whether the link state bit is set;
and under the condition that the link state position is set, the user plane functional entity acquires the link state information.
In some embodiments of the present disclosure, the obtaining, by the user plane functional entity, link state information includes:
the user plane functional entity collects link state information by using a link state database generated by a link state routing protocol;
the user plane functional entity encodes the link state information into a new rule in a message forwarding control protocol (PFCP) message.
In some embodiments of the present disclosure, the sending, by the user plane functional entity, the link state information to the session management functional entity includes:
and the user plane functional entity sends the PFCP message containing the link state information to the session management functional entity.
In some embodiments of the present disclosure, the determining, by the session management function entity according to the link state information, an optimal forwarding path of the user plane function entity includes:
a session management functional entity receives a PFCP message containing link state information;
the session management functional entity decodes the PFCP message containing the link state information to acquire the link state information;
the session management function entity determines the shortest forwarding path of the user plane function entity.
In some embodiments of the present disclosure, the issuing, by the session management functional entity, the optimal forwarding path to the user plane functional entity for execution includes:
the session management functional entity issues the optimal forwarding path to the user plane functional entity in the form of a data packet detection rule and a forwarding behavior rule;
and the user plane functional entity executes the data packet detection rule and the forwarding behavior rule.
According to another aspect of the present disclosure, there is provided a user plane functional entity, including:
a link state collector for acquiring link state information;
the link state encoder is used for sending the link state information to the session management functional entity and indicating the session management functional entity to determine the optimal forwarding path of the user plane functional entity according to the link state information;
and the path execution module is used for receiving the optimal forwarding path issued by the session management functional entity and executing the optimal forwarding path.
In some embodiments of the present disclosure, the link state collector is configured to obtain the link state information when receiving a link acquisition instruction issued by the session management function entity.
In some embodiments of the present disclosure, the link state collector is configured to, after receiving a link acquisition instruction of a packet forwarding control protocol PFCP packet sent by the session management functional entity, analyze whether a link state bit is set, where the session management functional entity adds the link state bit in the PFCP packet to enable the link state bit; and acquiring the link state information under the condition that the link state position is set.
In some embodiments of the disclosure, the user plane functional entity further comprises a link state database generated by a link state routing protocol, wherein:
a link state collector for collecting link state information using a link state database;
the link state encoder is used for encoding the link state information into a newly added rule in a message forwarding control protocol (PFCP) message; and the PFCP message containing the link state information is sent to the session management function entity.
In some embodiments of the present disclosure, the path execution module is configured to receive an optimal forwarding path issued by the session management function entity in the form of a data packet detection rule and a forwarding behavior rule, and execute the data packet detection rule and the forwarding behavior rule.
According to another aspect of the present disclosure, there is provided a session management function entity, including:
an optimal path determining module, configured to determine an optimal forwarding path of the user plane functional entity according to the link state information obtained and reported by the user plane functional entity; and sending the optimal forwarding path to a user plane functional entity for execution.
In some embodiments of the present disclosure, the session management function entity further includes:
and the link acquisition instruction enabler is used for issuing a link acquisition instruction to the user plane functional entity and indicating the user plane functional entity to acquire the link state information under the condition of receiving the link acquisition instruction.
In some embodiments of the present disclosure, the link acquisition instruction enabler is configured to add a link status bit in a packet forwarding control protocol PFCP message, and enable the link status bit; and issuing the PFCP message as a link acquisition instruction to the user plane functional entity, and indicating the user plane functional entity to analyze whether the link state position is set or not after receiving the PFCP message, and acquiring the link state information under the condition of the set link state position.
In some embodiments of the present disclosure, the session management function entity further includes:
the link state decoder is used for receiving a message forwarding control protocol (PFCP) message which contains link state information and is reported by a user plane functional entity, wherein the user plane functional entity codes the link state information into a newly added rule in the message forwarding control protocol (PFCP) message; and decoding the PFCP message containing the link state information to acquire the link state information.
In some embodiments of the present disclosure, the session management function entity further includes:
and the optimal path issuing module is used for issuing the optimal forwarding path to the user plane functional entity in the form of a data packet detection rule and a forwarding behavior rule and instructing the user plane functional entity to execute the data packet detection rule and the forwarding behavior rule.
According to another aspect of the present disclosure, there is provided a path optimization system for a 5G core network, including a user plane function entity as described in any of the above embodiments, and a session management function entity as described in any of the above embodiments.
According to another aspect of the present disclosure, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, which when executed by a processor, implement the path optimization method for a 5G core network according to any of the above embodiments.
The present disclosure may optimize a data forwarding path using link state information in a mobile core network.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings 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 creative efforts.
Fig. 1 is a schematic diagram of some embodiments of a path optimization method for a 5G core network according to the present disclosure.
Fig. 2 is a schematic diagram of TLV format encoding in some embodiments of the present disclosure.
Fig. 3 is a schematic diagram of other embodiments of a path optimization method for a 5G core network according to the present disclosure.
Fig. 4 is a diagram illustrating LSB bits in a PFCP message according to some embodiments of the present disclosure.
Fig. 5 is a schematic diagram of some embodiments of a path optimization system for a 5G core network according to the present disclosure.
Fig. 6 is a schematic diagram of another embodiment of a path optimization system for a 5G core network according to the present disclosure.
Detailed Description
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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. 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 relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic diagram of some embodiments of a path optimization method for a 5G core network according to the present disclosure. Preferably, this embodiment may be performed by the path optimization system for a 5G core network of the present disclosure. The path optimization system for the 5G core network comprises a user plane functional entity and a session management functional entity. The method of the embodiment of fig. 1 may include steps 11-14, wherein:
in some embodiments of the present disclosure, step 11 may include steps 111-112, wherein:
and step 111, the user plane functional entity acquires link state information by using a link state database generated by a link state routing protocol.
In some embodiments of the present disclosure, the link state routing Protocol may be an IGP (Interior Gateway Protocol).
In some embodiments of the present disclosure, the IGP protocol may include an Open Shortest Path First (OSPF) protocol and an Intermediate System-to-Intermediate System (ISIS) protocol.
Step 112, the user plane functional entity encodes the link status information into a new rule in the PFCP message.
In some embodiments of the present disclosure, in step 112, the newly added Rule in the PFCP message is a newly added PFCP LSR (Link State Rule).
In some embodiments of the present disclosure, the PFCP protocol is a control protocol between SMF and UPF in a 5G core network.
In some embodiments of the present disclosure, step 112 may also include adding a new IE (Information Element) Type.
In some embodiments of the present disclosure, step 112 may further comprise: link state description information is added in a form of TLV (Type, length, Value) format encoding. Fig. 2 is a schematic diagram of TLV format encoding in some embodiments of the present disclosure.
In some embodiments of the present disclosure, the link state description information may include link state description information such as a node descriptor, a link descriptor, a prefix descriptor, and the like.
And step 12, the user plane functional entity sends the link state information to the session management functional entity.
In some embodiments of the present disclosure, step 12 may comprise: and the user plane functional entity sends the PFCP message containing the link state information to the session management functional entity.
In some embodiments of the present disclosure, step 13 may include steps 131-133, wherein:
step 131, the session management function entity receives the PFCP message containing the link state information.
Step 132, the session management functional entity decodes the PFCP message containing the link status information to obtain the link status information.
Step 133, the session management functional entity determines the shortest forwarding path of the user plane functional entity.
In some embodiments of the present disclosure, step 133 may comprise: the session management functional entity can determine the shortest forwarding path of the user plane functional entity in a shortest path tree mode.
And step 14, the session management functional entity issues the optimal forwarding path to the user plane functional entity for execution.
In some embodiments of the present disclosure, step 14 may include steps 141-142, wherein:
step 141, the session management functional entity issues the optimal Forwarding path to the user plane functional entity in the form of PDR (Packet Detection Rule) and FAR (Forwarding Action Rule).
And 142, the user plane functional entity executes the data packet detection rule and the forwarding behavior rule.
Based on the path optimization method for the 5G core network provided by the above embodiment of the present disclosure, a link state database generated by a link state routing protocol (such as OSPF and ISIS) may be used, and the UPF acquires a link state and encodes the link state into a new rule in the PFCP protocol, and sends a PFCP packet including link state information to the SMF, so that the SMF obtains the link state of the UPF network. The SMF can decode the PFCP message to obtain the link state information, thereby calculating the optimal path of the UPF, and then issuing the optimal path to the UPF for execution by PDR and FAR rules.
In the embodiment of the present disclosure, under the condition that a plurality of UPFs exist in a 5G core network and a plurality of UPF forwarding paths may exist in each PDU session, a shortest UPF forwarding path may be selected, thereby greatly improving the performance of the overall system.
Fig. 3 is a schematic diagram of other embodiments of a path optimization method for a 5G core network according to the present disclosure. Preferably, this embodiment may be performed by the path optimization system for a 5G core network of the present disclosure. The path optimization system for the 5G core network comprises a user plane functional entity and a session management functional entity. The method of the embodiment of fig. 3 may include steps 31-39, wherein:
and step 31, the session management functional entity issues a link acquisition instruction to the user plane functional entity.
In some embodiments of the present disclosure, step 31 may include steps 311-312, wherein:
step 311, the session management functional entity adds a link status bit in the message forwarding control protocol PFCP message, and enables the link status bit.
In some embodiments of the present disclosure, the step 311 may include adding a Link State Bit (Link State Bit) to the original PFCP protocol as a Link State acquisition instruction of the issued PFCP message.
In some embodiments of the present disclosure, step 311 may comprise: the LSB bit is added to the Reporting Triggers IE.
Fig. 4 is a diagram illustrating LSB bits in a PFCP message according to some embodiments of the present disclosure. As shown in fig. 4, when LSB is 1, it indicates that SMF enables UPF to link state acquisition function; when LSB is 0, SMF is indicated to enable UPF to link state collection function.
Step 312, the session management functional entity issues the PFCP message as a link acquisition instruction to the user plane functional entity.
In some embodiments of the present disclosure, step 33 may include steps 331-332, wherein:
in step 331, after receiving the PFCP message, the user plane functional entity analyzes whether the link status bit is set (i.e., whether LSB is 1).
In step 332, under the condition that the link state bit is set (i.e., LSB is 1), the user plane functional entity collects link state information by using a link state database generated by the link state routing protocol.
In some embodiments of the present disclosure, the link state routing protocol may be an IGP protocol.
In some embodiments of the present disclosure, the IGP protocol may include an OSPF protocol and an ISIS protocol.
In some embodiments of the present disclosure, step 34 may comprise: the user plane functional entity encodes the link state information into a new rule in the PFCP message.
In some embodiments of the present disclosure, the newly added rule in the PFCP message is a newly added PFCP LSR rule.
In some embodiments of the present disclosure, step 34 may also include adding a new IE Type.
In some embodiments of the present disclosure, step 34 may further comprise: link state descriptive information is added in the form of TLV format encoding as shown in fig. 2.
In some embodiments of the present disclosure, the link state description information may include link state description information such as a node descriptor, a link descriptor, a prefix descriptor, and the like.
In some embodiments of the present disclosure, step 35 may comprise: the UPF adds the encoding result of step 34 to the PFCP reply message.
Step 36, the SMF receives the PFCP message.
Step 38, the SMF calculates the shortest path and issues PDR and FAR rules to the UPF.
Step 39, the UPF executes PDR and FAR rules.
In the embodiment of fig. 3 in the present disclosure, the steps on the left side (step 31, step 36-step 39) may be performed by the session management function SMF; the steps on the right side (steps 32-35, step 39) may be performed by the user plane function entity UPF.
The embodiments of the present disclosure may obtain the link state information in the domain through an IGP protocol (such as OSPF protocol and ISIS protocol) running in the UPF, encode the link state information into a PFCP protocol field, and send the PFCP protocol field to the SMF, and the SMF decodes the packet and then determines the optimal forwarding path of the UPF according to the collected link state information.
The above embodiments of the present disclosure provide that in a mobile core network, a data forwarding path may be optimized by using link state information.
The above embodiments of the present disclosure propose that the PFCP protocol may be employed to communicate link state information.
The above embodiments of the present disclosure propose that LSB link state bits may be added to the PFCP protocol.
The above embodiments of the present disclosure propose that LSR link state rules may be added to the PFCP protocol.
The above embodiments of the present disclosure provide an LSR link status rule coding method that can use the PFCP protocol.
Fig. 5 is a schematic diagram of some embodiments of a path optimization system for a 5G core network according to the present disclosure. The path optimization system for a 5G core network of the present disclosure may include a session management functional entity 52 and at least one user plane functional entity 51, wherein:
a user plane functional entity 51, configured to obtain link state information; and sending the link state information to a session management function entity.
In some embodiments of the present disclosure, the user plane functional entity 51 may be configured to execute the action command issued by the SMF (forward, discard, buffer, etc.)
In some embodiments of the present disclosure, the user plane functional entity 51 may be configured to collect link state information using a link state database generated by a link state routing protocol; the user plane functional entity encodes the link state information into a newly added rule in the PFCP message; and sending the PFCP message containing the link state information to a session management function entity.
The session management functional entity 52 is configured to determine an optimal forwarding path of the user plane functional entity according to the link state information; and issuing the optimal forwarding path to the user plane functional entity 51 for execution.
In some embodiments of the present disclosure, as shown in fig. 5, the session management function entity 52 may be configured to obtain link state information from a link state database of the user plane function entity 51 according to SPF (Shortest Path First); the shortest forwarding path of the user plane functional entity can be determined by adopting a shortest path tree mode; and issuing the optimal forwarding path to the user plane functional entity in the forms of PDR rules and FAR rules.
In some embodiments of the present disclosure, the session management function entity 52 may be used to perform control management functions.
In some embodiments of the present disclosure, the session management function 52 may interact with 3 user plane functions 51(UPF-1, UPF-1 and UPF-1), as shown in FIG. 5.
Based on the path optimization system for the 5G core network provided by the above embodiment of the present disclosure, a link state database generated by a link state routing protocol (such as OSPF and ISIS) may be used, and the UPF acquires a link state and encodes the link state into a new rule in the PFCP protocol, and sends a PFCP packet including link state information to the SMF, so that the SMF obtains the link state of the UPF network. The SMF can decode the PFCP message to obtain the link state information, thereby calculating the optimal path of the UPF, and then issuing the optimal path to the UPF for execution by PDR and FAR rules.
In the embodiment of the present disclosure, under the condition that a plurality of UPFs exist in a 5G core network and a plurality of UPF forwarding paths may exist in each PDU session, a shortest UPF forwarding path may be selected, thereby greatly improving the performance of the overall system.
Fig. 6 is a schematic diagram of another embodiment of a path optimization system for a 5G core network according to the present disclosure. Fig. 6 also gives a schematic diagram of the specific structure and function of the session management function entity and the user plane function entity. The following describes specific structures and functions of the session management function entity SMF and the user plane function entity UPF with reference to fig. 6.
In some embodiments of the present disclosure, the PFCP protocol is a control protocol between SMF and UPF in a 5G core network.
As shown in fig. 6, the user plane function 51 of the present disclosure may include a link state collector 511, a link state encoder 512, and a path execution module 513, wherein:
and a link state collector 511, configured to obtain link state information.
In some embodiments of the present disclosure, the link state collector 511 may be further configured to obtain the link state information when receiving a link acquisition instruction issued by the session management function entity.
In some embodiments of the present disclosure, the link state collector 511 may be further configured to, after receiving a link acquisition instruction of a packet forwarding control protocol PFCP packet sent by the session management functional entity, analyze whether a link state bit is set, where the session management functional entity adds the link state bit in the PFCP packet to enable the link state bit; and acquiring the link state information under the condition that the link state position is set.
And the link state encoder 512 is configured to send the link state information to the session management functional entity, and instruct the session management functional entity to determine an optimal forwarding path of the user plane functional entity according to the link state information.
The path executing module 513 is configured to receive the optimal forwarding path issued by the session management function entity, and execute the optimal forwarding path.
In some embodiments of the present disclosure, the path executing module 513 may be configured to receive an optimal forwarding path issued by the session management function entity in the form of a data packet detection rule and a forwarding behavior rule, and execute the data packet detection rule and the forwarding behavior rule.
In some embodiments of the present disclosure, as shown in fig. 5, the user plane functional entity may further include a link state database 514 generated by a link state routing protocol, wherein:
link state collector 511, for collecting link state information using link state database 514.
A link state encoder 512, configured to encode the link state information into a new rule in a message forwarding control protocol PFCP message; and the PFCP message containing the link state information is sent to the session management function entity.
Based on the user plane functional entity provided in the foregoing embodiment of the present disclosure, the intra-domain link state information may be obtained through an IGP protocol (such as an OSPF protocol and an ISIS protocol) running in the UPF, and encoded into a PFCP protocol field to be sent to the SMF, and the SMF decodes a packet and then determines the optimal forwarding path of the UPF according to the collected link state information.
The above embodiments of the present disclosure provide that in a mobile core network, a data forwarding path may be optimized by using link state information.
The above embodiments of the present disclosure propose that the PFCP protocol may be employed to communicate link state information.
The above embodiments of the present disclosure propose that LSB link state bits may be added to the PFCP protocol.
The above embodiments of the present disclosure propose that LSR link state rules may be added to the PFCP protocol.
The above embodiments of the present disclosure provide an LSR link status rule coding method that can use the PFCP protocol.
As shown in fig. 6, the session management function entity 52 of the present disclosure may include an optimal path determination module 521, where:
an optimal path determining module 521, configured to determine an optimal forwarding path of the user plane functional entity according to the link state information obtained and reported by the user plane functional entity; and sending the optimal forwarding path to a user plane functional entity for execution.
In some embodiments of the present disclosure, as shown in fig. 6, the session management function entity may further include a link acquisition instruction enabler 522, where:
the link acquisition instruction enabler 522 is configured to issue a link acquisition instruction to the user plane functional entity 51, and instruct the user plane functional entity to acquire link state information when receiving the link acquisition instruction.
In some embodiments of the present disclosure, the link acquisition instruction enabler 522 may be configured to add a link status bit in a packet forwarding control protocol PFCP message, enabling the link status bit; the PFCP message is issued to the user plane functional entity as a link acquisition instruction, and the user plane functional entity 51 is instructed to analyze whether the link state bit is set after receiving the PFCP message, and acquire the link state information under the condition of the link state bit.
In some embodiments of the present disclosure, as shown in fig. 6, the session management function entity may further include a link state decoder 523, wherein:
a link state decoder 523, configured to receive a packet forwarding control protocol PFCP message that includes link state information and is reported by a user plane functional entity, where the user plane functional entity encodes the link state information into a new rule in the packet forwarding control protocol PFCP message; decoding the PFCP message containing the link state information to obtain the link state information; and then sends the link status information to the optimal path determining module 521.
In some embodiments of the present disclosure, as shown in fig. 6, the session management function entity may further include an optimal path issuing module 524, where:
the optimal path issuing module 524 is configured to issue the optimal forwarding path to the user plane functional entity in the form of a data packet detection rule and a forwarding behavior rule, and instruct the user plane functional entity 51 to execute the data packet detection rule and the forwarding behavior rule.
Based on the session management functional entity provided by the embodiment of the present disclosure, a link state database generated by UPF using a link state routing protocol (e.g., OSPF and ISIS) is used, the UPF collects link states and encodes the link states into a newly added rule in a PFCP protocol, and receives a PFCP message containing link state information sent by the UPF.
In the embodiment of the present disclosure, under the condition that a plurality of UPFs exist in a 5G core network and a plurality of UPF forwarding paths may exist in each PDU session, a shortest UPF forwarding path may be selected, thereby greatly improving the performance of the overall system.
According to another aspect of the present disclosure, a computer-readable storage medium is provided, where the computer-readable storage medium stores computer instructions, and the instructions, when executed by a processor, implement the path optimization method for a 5G core network according to any of the above embodiments (for example, the embodiments of fig. 1 or fig. 3).
Based on the computer-readable storage medium provided by the above-mentioned embodiment of the present disclosure, a link state database generated by a link state routing protocol (such as OSPF and ISIS) may be utilized, and the UPF collects a link state and encodes the link state into a new rule in the PFCP protocol, and sends a PFCP packet containing link state information to the SMF, so that the SMF obtains the link state of the UPF network. The SMF can decode the PFCP message to obtain the link state information, thereby calculating the optimal path of the UPF, and then issuing the optimal path to the UPF for execution by PDR and FAR rules.
In the embodiment of the present disclosure, under the condition that a plurality of UPFs exist in a 5G core network and a plurality of UPF forwarding paths may exist in each PDU session, a shortest UPF forwarding path may be selected, thereby greatly improving the performance of the overall system.
The user plane functional entities and session management functional entities described above may be implemented as a general purpose processor, a Programmable Logic Controller (PLC), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any suitable combination thereof, for performing the functions described herein.
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.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware to implement the above embodiments, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk, an optical disk, or the like.
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 (19)
1. A path optimization method for a 5G core network is characterized by comprising the following steps:
a user plane functional entity acquires link state information;
the user plane functional entity sends the link state information to the session management functional entity;
the session management functional entity determines the optimal forwarding path of the user plane functional entity according to the link state information;
and the session management functional entity issues the optimal forwarding path to the user plane functional entity for execution.
2. The path optimization method for a 5G core network according to claim 1, further comprising:
the session management functional entity issues a link acquisition instruction to the user plane functional entity;
and under the condition of receiving the link acquisition instruction, the user plane functional entity acquires link state information.
3. The path optimization method for the 5G core network according to claim 2, wherein the step of the session management functional entity issuing a link acquisition instruction to the user plane functional entity includes:
a session management functional entity adds a link state bit in a message forwarding control protocol (PFCP) message to enable the link state bit;
the session management functional entity issues the PFCP message as a link acquisition instruction to the user plane functional entity;
the obtaining, by the user plane functional entity, the link state information includes, in the case of receiving the link acquisition instruction:
after receiving the PFCP message, the user plane functional entity analyzes whether the link state bit is set;
and under the condition that the link state position is set, the user plane functional entity acquires the link state information.
4. The path optimization method for a 5G core network according to any of claims 1-3, wherein the obtaining of the link state information by the user plane function entity comprises:
the user plane functional entity collects link state information by using a link state database generated by a link state routing protocol;
the user plane functional entity encodes the link state information into a new rule in a message forwarding control protocol (PFCP) message.
5. The path optimization method for 5G core network according to claim 4, wherein the sending the link state information to the session management function entity by the user plane function entity comprises:
and the user plane functional entity sends the PFCP message containing the link state information to the session management functional entity.
6. The path optimization method for a 5G core network according to claim 5, wherein the determining, by the session management functional entity, the optimal forwarding path of the user plane functional entity according to the link state information comprises:
a session management functional entity receives a PFCP message containing link state information;
the session management functional entity decodes the PFCP message containing the link state information to acquire the link state information;
the session management function entity determines the shortest forwarding path of the user plane function entity.
7. The path optimization method for the 5G core network according to any one of claims 1 to 3, wherein the step of the session management functional entity issuing the optimal forwarding path to the user plane functional entity for execution includes:
the session management functional entity issues the optimal forwarding path to the user plane functional entity in the form of a data packet detection rule and a forwarding behavior rule;
and the user plane functional entity executes the data packet detection rule and the forwarding behavior rule.
8. A user plane functional entity, comprising:
a link state collector for acquiring link state information;
the link state encoder is used for sending the link state information to the session management functional entity and indicating the session management functional entity to determine the optimal forwarding path of the user plane functional entity according to the link state information;
and the path execution module is used for receiving the optimal forwarding path issued by the session management functional entity and executing the optimal forwarding path.
9. The user plane functional entity of claim 8,
and the link state collector is used for acquiring the link state information under the condition of receiving the link acquisition instruction issued by the session management functional entity.
10. The user plane functional entity of claim 9,
the system comprises a link state collector and a session management function entity, wherein the link state collector is used for analyzing whether a link state bit is set or not after receiving a link acquisition instruction of a message forwarding control protocol (PFCP) message sent by the session management function entity, and the session management function entity adds the link state bit in the PFCP message to enable the link state bit; and acquiring the link state information under the condition that the link state position is set.
11. The user plane functional entity according to any of claims 8-10, further comprising a link state database generated by a link state routing protocol, wherein:
a link state collector for collecting link state information using a link state database;
the link state encoder is used for encoding the link state information into a newly added rule in a message forwarding control protocol (PFCP) message; and the PFCP message containing the link state information is sent to the session management function entity.
12. The user plane functional entity according to any of claims 8-10,
and the path execution module is used for receiving the optimal forwarding path issued by the session management function entity in the form of a data packet detection rule and a forwarding behavior rule and executing the data packet detection rule and the forwarding behavior rule.
13. A session management function entity, comprising:
an optimal path determining module, configured to determine an optimal forwarding path of the user plane functional entity according to the link state information obtained and reported by the user plane functional entity; and sending the optimal forwarding path to a user plane functional entity for execution.
14. The session management function entity of claim 13, further comprising:
and the link acquisition instruction enabler is used for issuing a link acquisition instruction to the user plane functional entity and indicating the user plane functional entity to acquire the link state information under the condition of receiving the link acquisition instruction.
15. The session management function entity of claim 14,
the link acquisition instruction enabler is used for adding a link state bit in a message forwarding control protocol (PFCP) message and enabling the link state bit; and issuing the PFCP message as a link acquisition instruction to the user plane functional entity, and indicating the user plane functional entity to analyze whether the link state position is set or not after receiving the PFCP message, and acquiring the link state information under the condition of the set link state position.
16. The session management function entity according to any of claims 13-15, further comprising:
the link state decoder is used for receiving a message forwarding control protocol (PFCP) message which contains link state information and is reported by a user plane functional entity, wherein the user plane functional entity codes the link state information into a newly added rule in the message forwarding control protocol (PFCP) message; and decoding the PFCP message containing the link state information to acquire the link state information.
17. The session management function entity according to any of claims 13-15, further comprising:
and the optimal path issuing module is used for issuing the optimal forwarding path to the user plane functional entity in the form of a data packet detection rule and a forwarding behavior rule and instructing the user plane functional entity to execute the data packet detection rule and the forwarding behavior rule.
18. A path optimisation system for a 5G core network comprising a user plane function entity as claimed in any of claims 8 to 12 and a session management function entity as claimed in any of claims 13 to 17.
19. A computer-readable storage medium, characterized in that the computer-readable storage medium stores computer instructions which, when executed by a processor, implement the path optimization method for a 5G core network according to any one of claims 1-7.
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