A method and system for dynamic adjustment of QOS flow based on dedicated QOS flow of 5G communication

Abstract

The application discloses a kind of 5G communication based on the QOS flow dynamic adjustment method and system of special QOS flow, and the session establishment request initiated by terminal UE is received by SMF network element, and special QOS flow is established for terminal UE;SMF network element issues the PDR of special QOS flow to UPF network element;UPF network element receives and carries out service detection to terminal UE according to PDR, and if the service detected meets PDR, then service event is reported to SMF network element;SMF network element carries out state switching according to the service event reported by UPF network element to the GBR or Non-GBR of special QOS flow;The application monitors the service information of terminal UE by UPF network element in real time, and informs SMF network element of the service use change condition of terminal UE, and dynamically adjusts QOS flow attribute according to the received notification information, adjusts QOS flow to GBR or Non-GBR, to meet the use of exclusive bandwidth of customer while realizing the full and effective use of 5G network bandwidth resource, avoid the waste of bandwidth resource.

Description

[0001] This case is a divisional application based on the invention patent filed on July 21, 2021, with application number 202110822629.4 and titled "A Dynamic Adjustment Method and System for QOS Flow". Technical Field

[0002] This invention relates to the field of communication technology, and in particular to a method and system for dynamic adjustment of QoS stream based on dedicated QoS stream in 5G communication. Background Technology

[0003] In 5G mobile communication systems, QoS guarantees are achieved based on QoS flows (quality of service). A QoS flow is the smallest granularity for QoS forwarding processing in a 5G system. 5G systems support both guaranteed bit rate (GBR) and non-GBR QoS flows, allocating different QoS flows according to service needs. The use of QoS flows is primarily controlled by the 5G core network element SMF (Session Management Function).

[0004] In existing technologies, the 5G core network typically pre-allocates QoS flows to the user equipment (UE). These flows are established and distributed to the UE in a single transaction when it establishes a PDU session. Under this technology, the GBR QoS flows can provide dedicated bandwidth guarantees for the UE, improving customer satisfaction with the 5G network. However, the GBR QoS flows allocated to the UE still consume bandwidth resources even when not in use. If the number of GBR QoS flows is large and the UE is not consistently using them, this leads to a significant waste of network bandwidth resources. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a method and system for dynamic adjustment of QoS flow, so as to realize the full and effective utilization of 5G network bandwidth resources and avoid the waste of bandwidth resources.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A method for establishing a dedicated QoS stream in 5G communication, comprising the following steps:

[0008] S1, the SMF network element of the 5G core network receives the session establishment request initiated by the terminal UE and establishes a dedicated QoS stream for the terminal UE;

[0009] Step S1 specifically involves:

[0010] S11. The SMF network element receives a session establishment request initiated by the UE, obtains the UE's subscription information from the UDM network element according to the session establishment request, and determines whether the subscription information indicates that the UE's service requires GBR broadband guarantee.

[0011] S12. If the subscription information indicates that the service of the terminal UE requires GBR broadband guarantee, then the SMF network element establishes a default QoS flow of Non-GBR and a dedicated QoS flow with an initial state of Non-GBR for the terminal UE.

[0012] A method for dynamic adjustment of QoS flow based on dedicated QoS flow in 5G communication, comprising the following steps:

[0013] S1. Establish a dedicated QoS stream, which is obtained by the method for establishing a dedicated QoS stream in 5G communication described above;

[0014] S2. The SMF network element sends the PDR of the dedicated QoS flow to the UPF network element;

[0015] S3. The UPF network element receives and performs service detection on the terminal UE according to the PDR. If the detected service conforms to the PDR, the UPF network element reports the service event to the SMF network element.

[0016] S4. The SMF network element determines whether the service event is a service start or service end based on the service event reported by the UPF network element, and switches the state of the dedicated QoS flow's GBR or Non-GBR according to the QoS parameter information of the service.

[0017] A method for dynamically adjusting QoS flow, comprising:

[0018] S1. The SMF network element receives a session establishment request initiated by the terminal UE and establishes a dedicated QoS stream for the terminal UE.

[0019] S2. The SMF network element sends the PDR of the dedicated QoS flow to the UPF network element;

[0020] S3. The UPF network element receives and performs service detection on the terminal UE according to the PDR. If the detected service conforms to the PDR, the UPF network element reports the service event to the SMF network element.

[0021] S4. The SMF network element switches the state of the dedicated QoS flow's GBR or Non-GBR according to the service event reported by the UPF network element.

[0022] To solve the above-mentioned technical problems, another technical solution adopted by the present invention is as follows:

[0023] A 5G core network SMF element stores a computer program. When the SMF element executes the computer program, it is used to: receive a session establishment request initiated by a terminal UE and establish a dedicated QoS stream for the terminal UE.

[0024] Specifically, it is used to: receive a session establishment request initiated by a terminal UE, obtain the subscription information of the terminal UE from the UDM network element according to the session establishment request, and determine whether the subscription information indicates that the terminal UE's service requires GBR broadband protection; if the subscription information indicates that the terminal UE's service requires GBR broadband protection, then the SMF network element establishes a default QoS flow of Non-GBR and a dedicated QoS flow with an initial state of Non-GBR for the terminal UE.

[0025] A 5G communication QoS flow dynamic adjustment system based on dedicated QoS flow, with SMF network element and UPF network element for communication connection;

[0026] The SMF network element adopts one of the SMF network elements of a 5G core network described above;

[0027] The SMF network element is also used to issue the PDR of the dedicated QoS flow to the UPF network element; based on the service event reported by the UPF network element, it determines whether the service event is the start or end of the service, and switches the state of the dedicated QoS flow's GBR or Non-GBR according to the QoS parameter information of the service.

[0028] The UPF network element is used to receive and perform service detection on the terminal UE according to the PDR. If a service that conforms to the PDR is detected, the UPF network element reports the service event to the SMF network element.

[0029] A dynamic adjustment system for QoS flow, including SMF network elements and UPF network elements with packet communication connections;

[0030] The SMF network element is used to receive a session establishment request initiated by the terminal UE, establish a dedicated QoS flow for the terminal UE, issue a PDR for the dedicated QoS flow to the UPF network element, and switch the state of the dedicated QoS flow's GBR or Non-GBR according to the service event reported by the UPF network element.

[0031] The UPF network element is used to receive and perform service detection on the terminal UE according to the PDR. If a service that conforms to the PDR is detected, the UPF network element reports the service event to the SMF network element.

[0032] The beneficial effects of this invention are as follows: This invention uses the UPF network element to monitor the service information of the terminal UE in real time and notify the SMF network element of changes in the service usage of the terminal UE. The SMF network element dynamically adjusts the QoS flow attributes according to the received notification information, adjusting the QoS flow to GBR or Non-GBR, thereby achieving full and effective utilization of 5G network bandwidth resources while satisfying the customer's use of dedicated bandwidth, and avoiding the waste of bandwidth resources. Attached Figure Description

[0033] Figure 1 This is a flowchart of a dynamic adjustment method for QoS flow according to an embodiment of the present invention;

[0034] Figure 2 This is a structural diagram of a dynamic adjustment system for QoS flow according to an embodiment of the present invention;

[0035] Figure 3 This is a sequence diagram of the dedicated QoS flow establishment process for a dynamic adjustment method of QoS flow according to an embodiment of the present invention.

[0036] Figure 4 This is a flowchart illustrating a specific dynamic adjustment process for QoS flow according to an embodiment of the present invention.

[0037] Label Explanation:

[0038] 1. A dynamic adjustment system for QoS flow; 2. SMF; 3. UPF. Detailed Implementation

[0039] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0040] Please refer to Figure 1 , Figure 3 and Figure 4 A method for dynamically adjusting QoS flows, comprising:

[0041] S1. The SMF network element receives a session establishment request initiated by the terminal UE and establishes a dedicated QoS stream for the terminal UE.

[0042] S2. The SMF network element sends the PDR of the dedicated QoS flow to the UPF network element;

[0043] S3. The UPF network element receives and performs service detection on the terminal UE according to the PDR. If the detected service conforms to the PDR, the UPF network element reports the service event to the SMF network element.

[0044] S4. The SMF network element switches the state of the dedicated QoS flow's GBR or Non-GBR according to the service event reported by the UPF network element.

[0045] As can be seen from the above description, the beneficial effects of the present invention are as follows: The present invention uses the UPF network element to monitor the service information of the terminal UE in real time and notifies the SMF network element of the changes in the service usage of the terminal UE. The SMF network element dynamically adjusts the QoS flow attributes according to the received notification information, adjusting the QoS flow to GBR or Non-GBR, thereby satisfying the customer's use of dedicated bandwidth while realizing the full and effective utilization of 5G network bandwidth resources and avoiding the waste of bandwidth resources.

[0046] Further, step S1 specifically includes:

[0047] S11. The SMF network element receives a session establishment request initiated by the UE, obtains the UE's subscription information from the UDM network element according to the session establishment request, and determines whether the subscription information indicates that the UE's service requires GBR broadband guarantee.

[0048] S12. If the subscription information indicates that the service of the terminal UE requires GBR broadband guarantee, then the SMF network element establishes a default QoS flow of Non-GBR and a dedicated QoS flow with an initial state of Non-GBR for the terminal UE.

[0049] As described above, the system determines whether a terminal needs GBR broadband protection based on the contract information. For UE terminals that need GBR broadband protection, an additional dedicated QoS flow with an initial state of Non-GBR is created in addition to the default QoS flow established for Non-GBR.

[0050] Further, step S2 specifically includes:

[0051] The SMF network element sends the information of the dedicated QoS flow and the corresponding PDR to the UPF network element, and enables the UPF network element to report the usage of the dedicated QoS flow.

[0052] Step S3 specifically involves:

[0053] The UPF network element receives the information of the dedicated QoS stream and the PDR, determines the dedicated QoS stream corresponding to the terminal UE based on the information of the dedicated QoS stream, and performs service detection on the terminal UE based on the PDR. If the detection of the start or end of a service that conforms to the PDR is detected, the corresponding service event is reported to the SMF network element.

[0054] As described above, the SMF network element sends information about the dedicated QoS stream and the corresponding Packet Detection Rule (PDR) to the UPF network element, enabling the UPF to detect the services of the terminal UE and enable the usage reporting function, so that the SMF can obtain the usage information of the dedicated QoS stream in a timely manner.

[0055] Further, step S4 specifically includes:

[0056] S41. The SMF network element receives the service event reported by the UPF and determines whether the service event is a service start or a service end.

[0057] S42. If the service event is the start of a service, the SMF network element obtains the QoS parameter information corresponding to the service from the PCF network element, and modifies the dedicated QoS to GBR state according to the QoS parameter information.

[0058] S42. If the service event is the end of service, the SMF network element will modify the dedicated QoS flow to Non-GBR state.

[0059] As described above, after receiving a service event reported by the UPF, the SMF network element will change the dedicated QoS flow to GBR state if the service event starts, in order to ensure bandwidth for the service. After receiving a service end event, it will switch back to Non-GBR state to release bandwidth resources.

[0060] Please refer to Figure 2 A dynamic adjustment system for QoS flow, comprising SMF network elements and UPF network elements for communication connection;

[0061] The SMF network element is used to receive a session establishment request initiated by the terminal UE, establish a dedicated QoS flow for the terminal UE, issue a PDR for the dedicated QoS flow to the UPF network element, and switch the state of the dedicated QoS flow's GBR or Non-GBR according to the service event reported by the UPF network element.

[0062] The UPF network element is used to receive and perform service detection on the terminal UE according to the PDR. If a service that conforms to the PDR is detected, the UPF network element reports the service event to the SMF network element.

[0063] As can be seen from the above description, the beneficial effects of the present invention are as follows: The present invention uses the UPF network element to monitor the service information of the terminal UE in real time and notifies the SMF network element of the changes in the service usage of the terminal UE. The SMF network element dynamically adjusts the QoS flow attributes according to the received notification information, adjusting the QoS flow to GBR or Non-GBR, thereby satisfying the customer's use of dedicated bandwidth while realizing the full and effective utilization of 5G network bandwidth resources and avoiding the waste of bandwidth resources.

[0064] Furthermore, the SMF network element is specifically used to receive a session establishment request initiated by the terminal UE, obtain the subscription information of the terminal UE from the UDM network element according to the session establishment request, and determine whether the subscription information indicates that the terminal UE's service requires GBR broadband guarantee; if the subscription information indicates that the terminal UE's service requires GBR broadband guarantee, then a default QoS flow with a non-GBR and a dedicated QoS flow with an initial state of non-GBR are established for the terminal UE.

[0065] As described above, the system determines whether a terminal needs GBR broadband protection based on the contract information. For UE terminals that need GBR broadband protection, an additional dedicated QoS flow with an initial state of Non-GBR is created in addition to the default QoS flow established for Non-GBR.

[0066] Furthermore, the SMF network element is specifically used to send the information of the dedicated QoS flow and the corresponding PDR to the UPF network element, and to enable the UPF network element to report the usage of the dedicated QoS flow.

[0067] The UPF network element is specifically used to receive the information of the dedicated QoS stream and the PDR, determine the dedicated QoS stream corresponding to the terminal UE based on the information of the dedicated QoS stream, and perform service detection on the terminal UE based on the PDR. When a service start or end that conforms to the PDR is detected, the corresponding service event is reported to the SMF network element.

[0068] As described above, the SMF network element sends information about the dedicated QoS stream and the corresponding Packet Detection Rule (PDR) to the UPF network element, enabling the UPF to detect the services of the terminal UE and enable the usage reporting function, so that the SMF can obtain the usage information of the dedicated QoS stream in a timely manner.

[0069] Furthermore, the SMF network element is specifically used to receive service events reported by the UPF, and determine whether the service event is a service start or a service end; if the service event is a service start, the SMF network element obtains the QoS parameter information corresponding to the service from the PCF network element, and modifies the dedicated QoS to GBR state according to the QoS parameter information; if the service event is a service end, the SMF network element modifies the dedicated QoS flow to Non-GBR state.

[0070] As described above, after receiving a service event reported by the UPF, the SMF network element will change the dedicated QoS flow to GBR state if the service event starts, in order to ensure bandwidth for the service. After receiving a service end event, it will switch back to Non-GBR state to release bandwidth resources.

[0071] Please refer to Figure 1 , Figure 3 and Figure 4 Embodiment 1 of the present invention is as follows:

[0072] A method for dynamically adjusting QoS flow, comprising:

[0073] S1. The SMF network element receives a session establishment request initiated by the terminal UE and establishes a dedicated QoS stream for the terminal UE.

[0074] Step S1 specifically involves:

[0075] S11. The SMF network element receives a session establishment request initiated by the UE, obtains the UE's subscription information from the UDM network element according to the session establishment request, and determines whether the subscription information indicates that the UE's service requires GBR broadband guarantee.

[0076] S12. If the subscription information indicates that the service of the terminal UE requires GBR broadband guarantee, then the SMF network element establishes a default QoS flow of Non-GBR and a dedicated QoS flow with an initial state of Non-GBR for the terminal UE.

[0077] In this embodiment, the SMF network element receives a PDU session establishment request from the terminal UE and obtains the terminal UE's subscription information from the UDM network element. If the terminal subscription information indicates that some services of the terminal UE require bandwidth guarantees, the SMF network element needs to establish two QoS flows for the terminal UE: a default QoS flow and a dedicated QoS flow. The default QoS flow is a Non-GBR QoS flow defined by the 3GPP standard, allowing all services to pass. The dedicated QoS flow is initially configured as a Non-GBR QoS flow, which only allows specific services to pass.

[0078] S2. The SMF network element sends the PDR of the dedicated QoS flow to the UPF network element;

[0079] Step S2 specifically involves:

[0080] The SMF network element sends the information of the dedicated QoS flow and the corresponding PDR to the UPF network element, and enables the UPF network element to report the usage of the dedicated QoS flow.

[0081] In this embodiment, on the 5G core network side, the SMF network element sends QoS flow information to the UPF network element. For dedicated QoS flows, the SMF network element sends the dedicated QoS flow's PDR (Packet Detection Rule) to the UPF network element, enabling the URR (Usage Reporting Rule) function for the dedicated QoS flow. The reporting trigger conditions are the start and end of the service.

[0082] S3. The UPF network element receives and performs service detection on the terminal UE according to the PDR. If the detected service conforms to the PDR, the UPF network element reports the service event to the SMF network element.

[0083] Step S3 specifically involves:

[0084] The UPF network element receives the information of the dedicated QoS stream and the PDR, determines the dedicated QoS stream corresponding to the terminal UE based on the information of the dedicated QoS stream, and performs service detection on the terminal UE based on the PDR. If the detection of the start or end of a service that conforms to the PDR is detected, the corresponding service event is reported to the SMF network element.

[0085] In this embodiment, the UPF network element detects the services of the terminal UE based on the PDR corresponding to the dedicated QoS stream issued by the SMF network element. When it is detected that the terminal UE starts using a service that conforms to the PDR through the dedicated QoS stream, the UPF network element reports the service start event to the SMF network element through the URR function.

[0086] S4. The SMF network element switches the state of the dedicated QoS flow's GBR or Non-GBR according to the service event reported by the UPF network element.

[0087] Step S4 specifically involves:

[0088] S41. The SMF network element receives the service event reported by the UPF and determines whether the service event is a service start or a service end.

[0089] S42. If the service event is the start of a service, the SMF network element obtains the QoS parameter information corresponding to the service from the PCF network element, and modifies the dedicated QoS to GBR state according to the QoS parameter information.

[0090] S42. If the service event is the end of service, the SMF network element will modify the dedicated QoS flow to Non-GBR state.

[0091] In this embodiment, after receiving a service start event reported by the UPF network element via the URR function, the SMF network element obtains the QoS parameter information configured for the service from the PCF network element. Using this configured QoS parameter information, the SMF network element modifies the dedicated QoS stream to a GBR QoS stream, providing bandwidth assurance for critical services. When the UPF network element detects the termination of a service at the terminal UE, it reports a service termination event to the SMF network element via the URR function. Upon receiving the service termination event reported by the UPF network element via the URR function, the SMF network element modifies the dedicated QoS stream to a Non-GBR QoS stream to release bandwidth resources.

[0092] Please refer to Figure 2 Embodiment two of the present invention is as follows:

[0093] A dynamic adjustment system for QoS flows includes an SMF network element and a UPF network element connected by a communication link. The SMF network element executes steps S1, S2, and S4 of a dynamic adjustment method for QoS flows according to Embodiment 1, and the UPF network element executes step S3 of the dynamic adjustment method for QoS flows according to Embodiment 1.

[0094] In summary, the present invention provides a dynamic adjustment method and system for QoS flows. The UPF network element monitors the service information of the terminal UE in real time and notifies the SMF network element of changes in the terminal UE's service usage. Based on the received notification information, the SMF network element dynamically adjusts the QoS flow attributes. At the start of a service, the dedicated QoS flow is modified to GBR state to ensure bandwidth availability. After the service ends, it switches back to Non-GBR state to release bandwidth resources. This achieves full and effective utilization of 5G network bandwidth resources while satisfying customers' need for dedicated bandwidth, avoiding bandwidth waste.

[0095] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for dynamic adjustment of QoS flow based on dedicated QoS flow in 5G communication, characterized in that, Including the following steps: S1. Establish a dedicated QoS stream; S2. The SMF network element sends the PDR of the dedicated QoS flow to the UPF network element; S3. The UPF network element receives and performs service detection on the terminal UE according to the PDR. If the detected service conforms to the PDR, the UPF network element reports the service event to the SMF network element. S4. The SMF network element determines whether the service event is a service start or a service end based on the service event reported by the UPF network element, and switches the state of the dedicated QoS flow's GBR or Non-GBR according to the QoS parameter information of the service. The method for establishing the dedicated QoS stream includes the following steps: S1, the SMF network element of the 5G core network receives the session establishment request initiated by the terminal UE and establishes a dedicated QoS stream for the terminal UE; Step S1 specifically involves: S11. The SMF network element receives a session establishment request initiated by the UE, obtains the UE's subscription information from the UDM network element according to the session establishment request, and determines whether the subscription information indicates that the UE's service requires GBR broadband guarantee. S12. If the subscription information indicates that the service of the terminal UE requires GBR broadband guarantee, then the SMF network element establishes a default QoS flow of Non-GBR and a dedicated QoS flow with an initial state of Non-GBR for the terminal UE. The default QoS flow is a Non-GBR QoS flow defined by the 3GPP standard, which allows all services to pass through; the initial configuration of the dedicated QoS flow is a Non-GBR QoS flow, which only allows specific services to pass through.

2. The method for dynamic adjustment of QoS flow based on dedicated QoS flow in 5G communication according to claim 1, characterized in that, Step S2 specifically involves: The SMF network element sends the information of the dedicated QoS flow and the corresponding PDR to the UPF network element, and enables the UPF network element to report the usage of the dedicated QoS flow. Step S3 specifically involves: The UPF network element receives the information of the dedicated QoS stream and the PDR, determines the dedicated QoS stream corresponding to the terminal UE based on the information of the dedicated QoS stream, and performs service detection on the terminal UE based on the PDR. If the detection of the start or end of a service that conforms to the PDR is detected, the corresponding service event is reported to the SMF network element.

3. The method for dynamic adjustment of QoS flow based on dedicated QoS flow in 5G communication according to claim 1, characterized in that, Step S4 includes the following steps: S41. The SMF network element receives a service event reported by the UPF and determines whether the service event is a service start or a service end. S42. If the service event is the start of a service, the SMF network element obtains the QoS parameter information corresponding to the service from the PCF network element, and modifies the dedicated QoS to GBR state according to the QoS parameter information. S43. If the service event is the end of service, the SMF network element will modify the dedicated QoS flow to Non-GBR state.

4. A 5G communication QoS stream dynamic adjustment system based on a dedicated QoS stream, characterized in that, The communication connection is between the SMF network element and the UPF network element; The SMF network element is also used to issue the PDR of the dedicated QoS flow to the UPF network element; based on the service event reported by the UPF network element, it determines whether the service event is the start or end of the service, and switches the state of the dedicated QoS flow's GBR or Non-GBR according to the QoS parameter information of the service. The UPF network element is used to receive and perform service detection on the terminal UE according to the PDR. If a service that matches the PDR is detected, the UPF network element will report the service event to the SMF network element. When the SMF network element executes a computer program, it is used to: receive a session establishment request initiated by the terminal UE and establish a dedicated QoS stream for the terminal UE; Specifically, it is used to: receive a session establishment request initiated by a terminal UE, obtain the subscription information of the terminal UE from the UDM network element according to the session establishment request, and determine whether the subscription information indicates that the terminal UE's service requires GBR broadband guarantee; if the subscription information indicates that the terminal UE's service requires GBR broadband guarantee, then the SMF network element establishes a default QoS flow of Non-GBR and a dedicated QoS flow with an initial state of Non-GBR for the terminal UE; The default QoS flow is a Non-GBR QoS flow defined by the 3GPP standard, which allows all services to pass through; the initial configuration of the dedicated QoS flow is a Non-GBR QoS flow, which only allows specific services to pass through.

5. A 5G communication dynamic adjustment system based on a dedicated QoS stream according to claim 4, characterized in that, The SMF network element is also used to send the information of the dedicated QoS flow and the corresponding PDR to the UPF network element, and to enable the UPF network element to report the usage of the dedicated QoS flow. The UPF network element is specifically used to receive the information of the dedicated QoS stream and the PDR, determine the dedicated QoS stream corresponding to the terminal UE based on the information of the dedicated QoS stream, and perform service detection on the terminal UE based on the PDR. When a service start or end that conforms to the PDR is detected, the corresponding service event is reported to the SMF network element.

6. A 5G communication dynamic adjustment system based on a dedicated QoS stream according to claim 4, characterized in that, The SMF network element is specifically used to receive service events reported by the UPF, and determine whether the service event is a service start or a service end. If the service event is a service start, the SMF network element obtains the QoS parameter information corresponding to the service from the PCF network element, and modifies the dedicated QoS to GBR state according to the QoS parameter information. If the service event is a service end, the SMF network element modifies the dedicated QoS flow to Non-GBR state.

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