CN112235833B - Dynamic configuration method of data flow parameters and session management functional entity - Google Patents

Abstract

The present disclosure provides a data flow parameter dynamic configuration method, a session management functional entity and a wireless access device, where the method includes: receiving a request sent by a user terminal for creating or modifying a delay-sensitive GBR service session; determining an MDBV policy applicable to the GBR service, and sending an indication message carrying the dynamic MDBV policy to the RAN; receiving a request of preempting a data stream of a maximum stream bit rate (MFBR) sent by a RAN; if the second data flow which can be preempted in the MFBR business session and the MFBR business session is found, the MFBR of the second data flow is modified; the data flow identification, session identification and modified MFBR of the second data flow are sent to the RAN. Radio resources of a second data stream that can preempt the MFBR are allocated to the first data stream for use in enhancing the MDBV of the first data stream. So that the RAN can forward the first data stream according to the improved MDBV, avoid packet loss of the first data stream, timely eliminate the influence of bursty time delay on time delay sensitive services, and ensure the PDB of the first data stream.

Description

Data stream parameter dynamic configuration method, session management functional entity

technical field

The disclosure belongs to the technical field of communication, and in particular relates to a method for dynamically configuring data flow parameters, a session management functional entity and wireless access equipment.

Background technique

In the 5G network, according to the authorization of the network, UPF will set MFBR according to each QoS (Quality of Service, quality of service) flow for GBR services, that is, the minimum bandwidth of the QoS flow is guaranteed to be GFBR (Guaranteed Flow BitRate, guaranteed flow bit rate ) while limiting it to not exceed MFBR.

In particular, for delay-sensitive GBR services, MDBV is also set. MDBV indicates the maximum amount of data that the 5G access network needs to transmit within the access network PDB (Packet Delay Budget, packet delay budget). In the prior art, a conventional method is to temporarily apply for an additional MDBV to a PCF (Policy Control Function, policy control functional entity) to meet the demand. However, since the core network delay experienced by the delay-sensitive GBR service data flow is often unpredictable, conventional methods cannot eliminate the impact of sudden delay on delay-sensitive services in time, and the preset PDB will be exceeded.

Contents of the invention

Aiming at the above-mentioned deficiencies in the prior art, the present disclosure provides a data flow parameter dynamic configuration method, a session management functional entity and a wireless access device.

As a first aspect of the present disclosure, a method for dynamically configuring data flow parameters is provided, including:

Receiving a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate GBR service session;

Determine the dynamic maximum data burst capacity MDBV policy applicable to the GBR service, and send an indication message carrying the dynamic MDBV policy to the wireless access device RAN;

Receive a preemption request sent by the RAN to preempt the maximum stream bit rate MFBR, where the preemption request includes the data stream identifier and session identifier of the first data stream;

If it is found that there are currently MFBR service sessions that can be preempted and the second data flow in the MFBR service session, modify the MFBR of the second data flow;

Sending the data flow identifier, session identifier, and modified MFBR of the second data flow to the RAN, so that the RAN modifies the MDBV of the first data flow, and forwards the first data flow according to the modified MDBV.

Preferably, the preemption request also includes an MDBV increment, and the search for the current MFBR service session that can be preempted and the second data flow in the MFBR service session include:

Determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the The wireless resource corresponding to the above MDBV increment.

Preferably, when the first data flow and the second data flow are both downlink data flows, the method further includes:

Send the data flow identifier, session identifier and modified MFBR of the second data flow to the user plane functional entity UPF, so that the UPF determines the corresponding second data flow according to the data flow identifier and the session identifier, and according to the modified The subsequent MFBR forwards the second data flow;

Receive the parameter changed message sent by the RAN;

Receiving the parameter recovery message sent by the RAN, the parameter recovery message is sent by the RAN after forwarding the first data stream according to the modified MDBV;

Sending a parameter recovery indication message to the UPF, so that the UPF forwards the second data flow according to the original MFBR.

As a second aspect of the present disclosure, a method for dynamically configuring data flow parameters is provided, including:

receiving an indication message sent by the session management function entity SMF;

If the first data flow is currently being forwarded to the user terminal, and it is detected that the packet delay budget PDB of the first data flow cannot be guaranteed, a preemption request is sent to the SMF to preempt the data flow of the MFBR, and the preemption request includes the first A data flow identifier and a session identifier of a data flow;

Receive the data stream identifier, session identifier and modified MFBR sent by the SMF, modify the MDBV of the first data stream according to the preset dynamic maximum data burst capacity MDBV increment, and forward the first data stream according to the modified MDBV data flow.

Preferably, after receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF, it also includes:

determining a corresponding second data flow according to the data flow identifier and the session identifier, and forwarding the second data flow according to the modified MFBR;

Send parameter changed message to SMF.

Preferably, the method also includes:

After the forwarding of the first data flow is completed, forward the first data flow according to the original MDBV, and forward the second data flow according to the original MFBR;

Send parameter restored message to SMF.

As a third aspect of the present disclosure, a session management functional entity is provided, including:

A receiving module, configured to receive a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate GBR service session;

A determining module, configured to determine the dynamic maximum data burst capacity MDBV policy applicable to the GBR service;

A sending module, configured to send an indication message carrying the dynamic MDBV policy to the wireless access device RAN;

The receiving module is also used to receive the preemption request sent by the RAN to preempt the data stream of the maximum stream bit rate MFBR, and the preemption request includes the data stream identifier and the session identifier of the first data stream;

A modification module, configured to modify the MFBR of the second data flow if it is found that there is currently a MFBR service session that can be preempted and a second data flow in the MFBR service session;

The sending module is further configured to send the data flow identifier, the session identifier, and the modified MFBR of the second data flow to the RAN, so that the RAN modifies the MDBV of the first data flow, and forwards the first data flow according to the modified MDBV. data flow.

Preferably, the preemption request includes an MDBV increment, and in the modification module, searching for the current MFBR service session that can be preempted and the second data flow in the MFBR service session includes:

Determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the The wireless resource corresponding to the above MDBV increment.

Preferably, when the first data flow and the second data flow are both downlink data flows, the sending module is further configured to send the data flow identifier, session identifier and modified MFBR of the second data flow sending to the user plane functional entity UPF, so that the UPF determines the corresponding second data flow according to the data flow identifier and the session identifier, and forwards the second data flow according to the modified MFBR;

The receiving module is also used to receive the parameter changed message sent by the RAN; receive the parameter restored message sent by the RAN, and the parameter restored message is sent by the RAN after forwarding the first data stream according to the modified MDBV;

The sending module is further configured to send a parameter recovery instruction message to the UPF, so that the UPF forwards the second data flow according to the original MFBR.

As a fourth aspect of the present disclosure, a wireless access device is provided, including:

A receiving module, configured to receive an indication message sent by a session management function entity SMF;

The sending module is configured to send a preemption request to the SMF to preempt the data flow of the MFBR if the first data flow is currently being forwarded to the user terminal, and it is detected that the packet delay budget PDB of the first data flow cannot be guaranteed, and the The preemption request includes a data flow identifier and a session identifier of the first data flow.

The receiving module is also used to receive the data stream identifier, the session identifier and the modified MFBR sent by the SMF;

A modification module, configured to modify the MDBV of the first data stream according to the preset dynamic maximum data burst capacity MDBV increase;

The first forwarding module is configured to forward the first data flow according to the modified MDBV.

Preferably, it also includes:

A determining module, configured to determine a corresponding second data flow according to the data flow identifier and the session identifier;

A second forwarding module, configured to forward the second data flow according to the modified MFBR;

The sending module is also used to send a parameter changed message to the SMF.

Preferably, it also includes:

A third forwarding module, configured to forward the first data stream according to the original MDBV after the forwarding of the first data stream is completed;

A fourth forwarding module, configured to forward the second data flow according to the original MFBR;

The sending module is also used to send a parameter recovery message to the SMF.

In the embodiment of the present disclosure, after the SMF sends an indication message carrying a dynamic MDBV policy to the wireless access device RAN, the SMF receives a request to send a data flow that preempts the maximum flow bit rate MFBR, indicating that the first data flow currently being forwarded by the RAN is Need to increase the data flow of MDBV. If the SMF finds that there are currently MFBR service sessions that can be preempted and the second data flow in the MFBR service session, then modify the MFBR of the second data flow, and send the data flow identifier, session identifier, and modified MFBR of the second data flow to RAN. The radio resource of the second data flow capable of preempting the MFBR is allocated to the first data flow, so as to improve the MDBV of the first data flow. So that the RAN can forward the first data flow according to the improved MDBV, avoid packet loss of the first data flow, timely eliminate the impact of sudden delay on delay-sensitive services, and ensure the PDB of the first data flow.

Description of drawings

FIG. 1 is a flow chart of a method for dynamically configuring data flow parameters provided by an embodiment of the present disclosure;

FIG. 2 is another flow chart of a method for dynamically configuring data stream parameters provided by an embodiment of the present disclosure;

FIG. 3 is a signaling diagram of a method for dynamically configuring data flow parameters provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a session management functional entity provided by an embodiment of the present disclosure;

Fig. 5 is a schematic structural diagram of a wireless access device provided by an embodiment of the present disclosure.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

For delay-sensitive GBR services, when the delay experienced by the QoS flow due to the core network may cause the data packet to reach the user UE exceeding the predetermined PDB, it will be forwarded in bursts to ensure that the PDB requirements of the QoS flow are met , but using the preset MDBV may exceed the data packets of the PDB. In order to solve the problem of temporarily applying for an additional MDBV to the PCF to meet the demand in the prior art, it is difficult to timely eliminate the impact of sudden delay on delay-sensitive services, which will exceed the preset PDB. The present disclosure provides a data flow parameter dynamic configuration method, a session management functional entity and a wireless access device. The following will be described in detail one by one with reference to the drawings of the embodiments provided in the present disclosure.

Fig. 1 shows a flowchart of a method for dynamically configuring data flow parameters provided by an embodiment of the present disclosure. The data flow parameter dynamic configuration method can be applied to the session management functional entity, and is applicable to both upstream data flow forwarding and downstream data flow forwarding. As shown in FIG. 1 , the method for dynamically configuring data flow parameters provided by this embodiment includes the following steps.

Step 101, receiving a request for creating or modifying a delay-sensitive GBR service session sent by a user terminal.

Step 102, determine the dynamic MDBV policy applicable to the GBR service.

Step 103, sending an indication message carrying a dynamic MDBV policy to the wireless access device RAN.

In this step, the SMF sends an indication message carrying a dynamic MDBV policy to the RAN, so that the RAN configures the GBR service according to the dynamic MDBV policy.

Step 104, receiving the preemption request sent by the RAN to preempt the data stream of the maximum stream bit rate MFBR.

Wherein, the first data flow is a QoS flow, the first data flow has experienced the delay of the core network, and packet loss may occur, the PDB of the first data flow cannot be guaranteed, and the MDBV of the first data flow needs to be increased. The preemption request includes a data flow identifier and a session identifier of the first data flow.

Step 105: If it is found that there are currently MFBR service sessions that can be preempted and the second data flow in the MFBR service session, modify the MFBR of the second data flow.

Step 106: Send the data flow identifier, session identifier and modified MFBR of the second data flow to the RAN, so that the RAN modifies the MDBV of the first data flow and forwards the first data flow according to the modified MDBV.

In the embodiment of the present disclosure, after the SMF sends an indication message carrying a dynamic MDBV policy to the wireless access device RAN, the SMF receives a request to send a data flow that preempts the maximum flow bit rate MFBR, indicating that the first data flow currently being forwarded by the RAN is Need to increase the data flow of MDBV. If the SMF finds that there are currently MFBR service sessions that can be preempted and the second data flow in the MFBR service session, then modify the MFBR of the second data flow, and send the data flow identifier, session identifier, and modified MFBR of the second data flow to RAN. The radio resource of the second data flow capable of preempting the MFBR is allocated to the first data flow, so as to improve the MDBV of the first data flow. So that the RAN can forward the first data flow according to the improved MDBV, avoid packet loss of the first data flow, timely eliminate the impact of sudden delay on delay-sensitive services, and ensure the PDB of the first data flow.

Further, the preemption request includes an MDBV increment. In the step 104, searching for the second data flow in the MFBR service session and the MFBR service session that can be preempted currently includes:

Determine the second data flow according to the MDBV increase, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the corresponding MDBV increase wireless resources.

In this step, for example, the MFBR of the data stream is 10MB/s, but the current transmission of the data stream only uses 2MB/s. Therefore, the data stream can be a data stream that can currently preempt the MFBR, and the MFBR of the data stream can be modified. MFBR is any value greater than or equal to 2MB/s and less than 10MB/s. In addition, it is also necessary to determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow. For example, if the MDBV increase is 4MB/s, the difference between the modified MFBR of the second data stream and 10MB/s should be greater than or equal to 4MB/s, and the modified MFBR of the second data stream should be greater than or equal to 2MB/s And less than or equal to any value between 6MB/s, the radio resource corresponding to the second data flow MFBR is enough to be allocated to the first data flow. A data flow that satisfies the above conditions and can currently be preempted by the MFBR is selected as the second data flow. The first data flow is a QoS flow.

Further, when the first data flow and the second data flow are both downlink data flows, the method further includes:

Send the data flow identifier, session identifier and modified MFBR of the second data flow to the user plane functional entity UPF, so that the UPF determines the corresponding second data flow according to the data flow identifier and the session identifier, and according to the modified The subsequent MFBR forwards the second data flow.

Receive the parameter changed message sent by the RAN.

Receiving a parameter recovery message sent by the RAN, where the parameter recovery message is sent by the RAN after forwarding the first data stream according to the modified MDBV is completed.

Sending a parameter recovery indication message to the UPF, so that the UPF forwards the second data flow according to the original MFBR.

Fig. 2 shows another flow chart of the method for dynamically configuring data flow parameters provided by an embodiment of the present disclosure. The method for dynamically configuring data flow parameters can be applied to wireless access equipment, and is applicable to forwarding of uplink data flow and forwarding of downlink data flow. As shown in FIG. 2 , the method for dynamically configuring data flow parameters provided by this embodiment includes the following steps.

Step 201, receiving an indication message sent by a session management function entity SMF.

Step 202: If the first data flow is currently being forwarded to the user terminal, and it is detected that the PDB of the first data flow cannot be guaranteed, send a preemption request to the SMF to preempt the data flow of the MFBR.

Wherein, the preemption request includes a data flow identifier and a session identifier of the first data flow, and the first data flow is a QoS flow.

Step 203, receiving the data stream identifier, session identifier and modified MFBR sent by the SMF.

Step 204: Modify the MDBV of the first data stream according to the preset dynamic maximum data burst capacity MDBV increment.

Step 205, forward the first data flow according to the modified MDBV.

In the embodiment of the present disclosure, after the RAN receives the instruction message sent by the session management function entity SMF, if the RAN detects that the first data flow currently being forwarded is a data flow that needs to increase the MDBV, it sends a message to the SMF to preempt the maximum flow bit rate MFBR A preemption request for a data stream. The RAN receives the data flow identifier, the session identifier and the modified MFBR sent by the SMF, modifies the MDBV of the first data flow according to the preset MDBV increment, and forwards the first data flow according to the modified MDBV. The radio resource of the second data flow capable of preempting the MFBR is allocated to the first data flow, so as to improve the MDBV of the first data flow. So that the RAN can forward the first data flow according to the improved MDBV, avoid packet loss of the first data flow, timely eliminate the impact of sudden delay on delay-sensitive services, and ensure the PDB of the first data flow.

Further, after receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF (ie step 203), it also includes: determining the corresponding second data flow according to the data flow identifier and the session identifier, and forwarding according to the modified MFBR The second data flow: sending a parameter changed message to the SMF.

Further, the method further includes: after the forwarding of the first data flow is completed, forwarding the first data flow according to the original MDBV, and forwarding the second data flow according to the original MFBR; sending a parameter recovery message to the SMF.

Fig. 3 shows a signaling diagram of a method for dynamically configuring data flow parameters provided by an embodiment of the present disclosure. In order to understand the technical solution of the present disclosure more clearly, the method for dynamically configuring data flow parameters provided in this embodiment will be described in detail in conjunction with the signaling diagram shown in FIG. 3 .

In step (1), the user terminal sends a request for creating or modifying a delay-sensitive GBR service session to the SMF.

In step (2), the SMF determines the dynamic MDBV policy applicable to the GBR service.

In this step, the SMF determines the dynamic MDBV policy applicable to the GBR service in two ways. The first method is that the SMF requests the dynamic service rules from the PCF to query whether the current user's GBR service is applicable to the dynamic MDBV strategy. If the PCF determines whether the user terminal's GBR service is applicable to the dynamic MDBV strategy according to the mobile communication network configuration scheduling strategy, Then send an indication message that the user terminal carries an applicable dynamic MDBV policy to the SMF. The second way is that the SMF determines the dynamic MDBV policy applicable to the user terminal according to the locally configured policy.

In step (3), the SMF sends an indication message carrying a dynamic MDBV policy to the RAN.

In this step, the SMF sends an indication message carrying a dynamic MDBV policy to the RAN, so that the RAN configures the currently forwarding GBR service according to the dynamic MDBV policy.

Step (4): If the RAN is currently forwarding the first data flow to the user terminal, and detects that the PDB of the first data flow cannot be guaranteed, then send a preemption request to the SMF to preempt the data flow of the MFBR.

Wherein, the preemption request includes a data flow identifier and a session identifier of the first data flow, and the first data flow is a QoS flow.

In this step, if the PDB of the first data flow that the RAN is currently forwarding to the user terminal cannot be guaranteed, that is, it indicates that the preset MDBV needs to be increased at the same time, and the first data flow may cause packet loss due to the delay of the core network . The RAN sends a preemption request for preempting the data flow of the MFBR to the SMF. The radio resource of the data flow capable of preempting the MFBR is allocated to the first data flow, so as to increase the MDBV of the first data flow. So that the RAN can forward the first data flow according to the improved MDBV, avoid packet loss of the first data flow, and ensure the PDB of the first data flow. The preemption request also includes a preset MDBV increment.

In step (5), if the SMF finds that there is currently an MFBR service session that can be preempted and a second data flow in the MFBR service session, then modify the MFBR of the second data flow.

In this step, since the data flow of the GBR service does not always reach the peak value defined by the MFBR, and as long as the forwarding rate of the data flow of the GBR service is not lower than the GFBR, the QoS requirement of the data flow of the GBR service can be met. For example, the MFBR of the data flow is 10MB/s, but the current transmission of the data flow only takes 2MB/s. Therefore, the data flow can be a data flow that can currently preempt the MFBR, and modify the MFBR of the data flow to be greater than or equal to 2MB Any value between /s and less than 10MB/s. In addition, it is also necessary to determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the MDBV The radio resources corresponding to the increment. For example, if the MDBV increase is 4MB/s, the difference between the modified MFBR of the second data stream and 10MB/s should be greater than or equal to 4MB/s, and the modified MFBR of the second data stream should be greater than or equal to 2MB/s And less than or equal to any value between 6MB/s, the radio resource corresponding to the second data flow MFBR is enough to be allocated to the first data flow. A data flow that satisfies the above conditions and can currently be preempted by the MFBR is selected as the second data flow, and the MFBR of the second data flow will be reduced. The second data flow is a QoS flow.

In a preferred implementation manner, the SMF searches for the second data flow that can currently be preempted by the MFBR. A data flow may also be pre-specified, or a data flow calculated through the network, or a data flow selected by the user.

It should be noted that there may be multiple second data streams, that is, multiple second data streams are found at the same time, and the MFBR of the multiple second data streams is reduced at the same time, so that the radio resources corresponding to the multiple second data streams MFBR are sufficient. assigned to the first data stream.

In step (6), the SMF sends the data flow identifier, the session identifier and the modified MFBR of the second data flow to the RAN.

In a preferred embodiment, the SMF also sends the data flow identifier and session identifier of the first data flow to the RAN to indicate that the SMF performs MFBR preemption for the first data flow, that is, the first data flow and the preemption The mapping relationship between the second data stream of the MFBR and the modified MFBR are sent to the SMF.

In step (7), the RAN modifies the MDBV of the first data stream according to the preset MDBV increment.

In this step, because the RAN presets the MDBV increment, and the second data flow found by the SMF is also determined based on the MDBV increment, the RAN receives the data flow identifier, the session identifier, and the second data flow sent by the SMF. When the MFBR is modified, it indicates that the SMF has found the second data flow that can preempt the MFBR, and the RAN can increase the MDBV of the first data flow being forwarded according to the preset MDBV increment. That is, it is realized that the radio resource corresponding to the MFBR of the second data flow is allocated to the first data flow, so as to improve the MDBV of the first data flow.

In step (8), the RAN forwards the first data flow according to the modified MDBV.

In step (9), the RAN determines the corresponding second data flow according to the data flow identifier and the session identifier.

Step (10), RAN forwards the second data flow according to the modified MFBR.

In step (11), the RAN sends a parameter changed message to the SMF.

Step (12), after the first data flow is forwarded, the RAN forwards the first data flow according to the original MDBV, and forwards the second data flow according to the original MDBV.

In step (13), the RAN sends a parameter recovery message to the SMF.

It should be noted that the above steps (1) to (13) are applicable to both forwarding of uplink data flow and forwarding of downlink data flow.

In a preferred implementation manner, if the embodiment of the present disclosure is only applicable to downlink data flow forwarding, step (6) also includes that the SMF sends the data flow identifier, session identifier and modified MFBR of the second data flow to UPF. The UPF is a device on the core network side. When UPF receives the data flow identifier, session identifier and modified MFBR sent by SMF, it determines the corresponding second data flow according to the data flow identifier and session identifier, forwards the second data flow according to the modified MFBR, and UPF sends MFBR parameters configured message. After step (13), it indicates that the first data flow on the RAN side has been forwarded, and the MDBV and MFBR of the first data flow have been restored. At this time, the SMF sends an instruction recovery parameter message to the UPF, and the UPF can forward the first data flow according to the original MFBR. In the second data stream, the UPF sends a message that the MFBR parameter has been restored to the SMF.

It should be noted that if the embodiment of the present disclosure is only applicable to downlink data flow forwarding, the user terminal corresponding to the second data flow must be in the same radio resource allocation area as the first data flow, for example, the same sector. If the terminal corresponding to the second data flow leaves the current resource coverage area due to movement, the MFBR of the newly created session will not change the MDBV of the first data flow before the forwarding of the first data flow in the RAN is completed. And after step (13), the SMF can increase the MFBR of the newly created session. In the process of performing steps (8)-steps (10) and UPF forwarding the second data flow according to the modified MFBR, if the terminal corresponding to the first data flow leaves the current resource coverage area due to movement, the SMF can The region selects the third data stream to meet the requirement of the first data stream for MDVB, and restores the MFBR of the second data stream at the same time. If the embodiments of the present disclosure are applicable to uplink data flow forwarding, all uplink data flows originate from the same user terminal, so it is not necessary to determine whether the first data flow and the second data flow are in the same resource allocation area, because the first data flow It is always in the same resource allocation area as the second data flow.

Fig. 4 shows a schematic structural diagram of a session management function entity provided by an embodiment of the present disclosure. Based on the same technical concept as the embodiment corresponding to FIG. 1 , as shown in FIG. 4 , the session management function entity provided by the embodiment of the present disclosure includes the following modules.

The receiving module 11 is configured to receive a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate (GBR) service session.

The determination module 12 is configured to determine the dynamic maximum data burst capacity MDBV policy applicable to the GBR service.

The sending module 13 is configured to send an indication message carrying the dynamic MDBV policy to the wireless access device RAN.

The receiving module 11 is further configured to receive a preemption request sent by the RAN to preempt a data stream with a maximum stream bit rate of MFBR, and the preemption request includes a data stream ID and a session ID of the first data stream.

The modification module 14 is configured to modify the MFBR of the second data flow if it is found that there is currently an MFBR service session that can be preempted and a second data flow in the MFBR service session.

The sending module 13 is further configured to send the data flow identifier, the session identifier, and the modified MFBR of the second data flow to the RAN, so that the RAN modifies the MDBV of the first data flow, and forwards the second data flow according to the modified MDBV. a data stream.

Preferably, the preemption request includes an MDBV increment, and in the modification module, searching for the current MFBR service session that can be preempted and the second data flow in the MFBR service session includes:

Determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the The wireless resource corresponding to the above MDBV increment.

Preferably, when the first data flow and the second data flow are both downlink data flows, the sending module 13 is further configured to send the data flow identifier, session identifier and modified The MFBR is sent to the user plane functional entity UPF, so that the UPF determines the corresponding second data flow according to the data flow identifier and the session identifier, and forwards the second data flow according to the modified MFBR.

The receiving module 11 is also configured to receive a parameter changed message sent by the RAN; receive a parameter restored message sent by the RAN, and the parameter restored message is sent by the RAN after forwarding the first data stream according to the modified MDBV is completed.

The sending module 13 is further configured to send a message indicating recovery parameters to the UPF, so that the UPF forwards the second data flow according to the original MFBR.

Fig. 5 shows a schematic structural diagram of a wireless access device provided by an embodiment of the present disclosure. Based on the same technical concept as the embodiment corresponding to FIG. 2 , as shown in FIG. 5 , the wireless access device provided by the embodiment of the present disclosure includes the following modules.

The receiving module 21 is configured to receive the indication message sent by the session management function entity SMF.

The sending module 22 is configured to send a preemption request to the SMF to preempt the data flow of the MFBR if the first data flow is currently being forwarded to the user terminal, and it is detected that the packet delay budget PDB of the first data flow cannot be guaranteed. The preemption request includes a data flow identifier and a session identifier of the first data flow.

The receiving module 21 is also used for receiving the data stream ID, the session ID and the modified MFBR sent by the SMF.

A modifying module 23, configured to modify the MDBV of the first data stream according to a preset dynamic maximum data burst capacity MDBV increment.

The first forwarding module 24 is configured to forward the first data flow according to the modified MDBV.

Preferably, it also includes:

A determining module, configured to determine a corresponding second data flow according to the data flow identifier and the session identifier.

A second forwarding module, configured to forward the second data flow according to the modified MFBR.

The sending module is also used to send a parameter changed message to the SMF.

Preferably, it also includes:

The third forwarding module is configured to forward the first data stream according to the original MDBV after the forwarding of the first data stream is completed.

The fourth forwarding module is configured to forward the second data flow according to the original MFBR.

The sending module is also used to send a parameter recovery message to the SMF.

It can be understood that, the above implementations are only exemplary implementations adopted to illustrate the principle of the present disclosure, but the present disclosure is not limited thereto. For those skilled in the art, without departing from the spirit and essence of the present disclosure, various modifications and improvements can be made, and these modifications and improvements are also regarded as the protection scope of the present disclosure.

Claims (8)

1. A data flow parameter dynamic configuration method, characterized in that, comprising: Receiving a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate GBR service session; Determine the dynamic maximum data burst capacity MDBV policy applicable to the GBR service, and send an indication message carrying the dynamic MDBV policy to the wireless access device RAN; Receive the preemption request sent by the RAN to preempt the data stream of the maximum stream bit rate MFBR, where the preemption request includes the data stream identifier and the session identifier of the first data stream; If it is found that there are currently MFBR service sessions that can be preempted and the second data flow in the MFBR service session, modify the MFBR of the second data flow; Send the data flow identification, session identification and modified MFBR of the second data flow to the RAN, so that the RAN modifies the MDBV of the first data flow, and forwards the first data flow according to the modified MDBV; The preemption request also includes an MDBV increment, and the finding that there are currently MFBR service sessions that can be preempted and the second data flow in the MFBR service session includes: Determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the The wireless resource corresponding to the above MDBV increment. 2. The method for dynamically configuring data stream parameters according to claim 1, wherein when both the first data stream and the second data stream are downstream data streams, the method further comprises: Send the data flow identifier, session identifier and modified MFBR of the second data flow to the user plane functional entity UPF, so that the UPF determines the corresponding second data flow according to the data flow identifier and the session identifier, and according to the modified The subsequent MFBR forwards the second data flow; Receive the parameter changed message sent by the RAN; Receiving the parameter recovery message sent by the RAN, the parameter recovery message is sent by the RAN after forwarding the first data stream according to the modified MDBV; Sending a parameter recovery indication message to the UPF, so that the UPF forwards the second data flow according to the original MFBR. 3. A method for dynamically configuring data flow parameters, comprising: receiving an indication message sent by the session management function entity SMF; If the first data flow is currently being forwarded to the user terminal, and it is detected that the packet delay budget PDB of the first data flow cannot be guaranteed, a preemption request is sent to the SMF to preempt the data flow of the maximum flow bit rate MFBR, and the preemption The request includes a data flow identifier and a session identifier of the first data flow; Receive the data stream identifier, session identifier and modified MFBR sent by the SMF, modify the MDBV of the first data stream according to the preset dynamic maximum data burst capacity MDBV increment, and forward the first data stream according to the modified MDBV Data flow; after receiving the data flow identifier, session identifier and modified MFBR sent by SMF, it also includes: determining a corresponding second data flow according to the data flow identifier and the session identifier, and forwarding the second data flow according to the modified MFBR; Send parameter changed message to SMF. 4. The method for dynamically configuring data flow parameters according to claim 3, wherein the method further comprises: After the forwarding of the first data flow is completed, forward the first data flow according to the original MDBV, and forward the second data flow according to the original MFBR; Send parameter restored message to SMF. 5. A session management functional entity, characterized in that, comprising: A receiving module, configured to receive a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate GBR service session; A determining module, configured to determine the dynamic maximum data burst capacity MDBV policy applicable to the GBR service; A sending module, configured to send an indication message carrying the dynamic MDBV policy to the wireless access device RAN; The receiving module is also used to receive the preemption request sent by the RAN to preempt the data stream of the maximum stream bit rate MFBR, and the preemption request includes the data stream identifier and the session identifier of the first data stream; A modification module, configured to modify the MFBR of the second data flow if it is found that there is currently a MFBR service session that can be preempted and a second data flow in the MFBR service session; The sending module is further configured to send the data flow identifier, the session identifier, and the modified MFBR of the second data flow to the RAN, so that the RAN modifies the MDBV of the first data flow, and forwards the first data flow according to the modified MDBV. Data stream; the preemption request also includes an MDBV increment, and in the modification module, searching for the second data stream in the MFBR service session and the MFBR service session that can be preempted currently includes: Determine the second data flow according to the MDBV increment, and determine the MFBR service session corresponding to the second data flow; wherein, the wireless resource corresponding to the difference between the modified MFBR and the original MFBR of the second data flow is greater than or equal to the The wireless resource corresponding to the above MDBV increment. 6. The session management function entity according to claim 5, wherein when the first data flow and the second data flow are both downlink data flows, the sending module is further configured to send the second data flow The data flow identifier, session identifier and modified MFBR of the second data flow are sent to the user plane functional entity UPF, so that UPF determines the corresponding second data flow according to the data flow identifier and session identifier, and forwards it according to the modified MFBR second data stream; The receiving module is also used to receive the parameter changed message sent by the RAN; receive the parameter restored message sent by the RAN, and the parameter restored message is sent by the RAN after forwarding the first data stream according to the modified MDBV; The sending module is further configured to send a parameter recovery instruction message to the UPF, so that the UPF forwards the second data flow according to the original MFBR. 7. A wireless access device, characterized in that it comprises: A receiving module, configured to receive an indication message sent by a session management function entity SMF; The sending module is configured to send a preemption request to the SMF to preempt the data flow of the MFBR if the first data flow is currently being forwarded to the user terminal, and it is detected that the packet delay budget PDB of the first data flow cannot be guaranteed, and the The preemption request includes a data flow identifier and a session identifier of the first data flow; The receiving module is also used to receive the data stream identifier, the session identifier and the modified MFBR sent by the SMF; A modification module, configured to modify the MDBV of the first data stream according to the preset dynamic maximum data burst capacity MDBV increase; A first forwarding module, configured to forward the first data flow according to the modified MDBV; A determining module, configured to determine a corresponding second data flow according to the data flow identifier and the session identifier; A second forwarding module, configured to forward the second data flow according to the modified MFBR; The sending module is also used to send a parameter changed message to the SMF. 8. The wireless access device according to claim 7, further comprising: A third forwarding module, configured to forward the first data stream according to the original MDBV after the forwarding of the first data stream is completed; A fourth forwarding module, configured to forward the second data flow according to the original MFBR; The sending module is also used to send a parameter recovery message to the SMF.

Images