CN112235833B - Dynamic configuration method of data flow parameters and session management functional entity - Google Patents
Dynamic configuration method of data flow parameters and session management functional entity Download PDFInfo
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- CN112235833B CN112235833B CN202011098075.XA CN202011098075A CN112235833B CN 112235833 B CN112235833 B CN 112235833B CN 202011098075 A CN202011098075 A CN 202011098075A CN 112235833 B CN112235833 B CN 112235833B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
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
Technical Field
The disclosure belongs to the technical field of communication, and in particular relates to a data flow parameter dynamic configuration method, a session management functional entity and wireless access equipment.
Background
In a 5G network, the UPF will set the MFBR per QoS (Quality of Service ) flow for GBR traffic, i.e. it is restricted that it cannot exceed the MFBR while guaranteeing that the QoS flow has a minimum bandwidth of GFBR (Guaranteed Flow Bit Rate ) according to the network's authorization.
In particular, for delay-sensitive GBR traffic, an MDBV is also set, which represents the maximum amount of data that the 5G access network needs to transmit within the access network PDB (Packet Delay Budget ). In the prior art, it is common practice to temporarily apply for additional MDBVs to PCFs (Policy Control Function, policy control function entities) to meet the requirements. However, since the delay of the core network experienced by the delay-sensitive GBR service data flow is often unpredictable, the conventional method cannot timely eliminate the influence of the sudden delay on the delay-sensitive service, and the influence exceeds the preset PDB.
Disclosure of Invention
The present disclosure provides a data flow parameter dynamic configuration method, a session management functional entity, and a wireless access device, which address the above-mentioned shortcomings in the prior art.
As a first aspect of the present disclosure, there is provided a data flow parameter dynamic configuration method, including:
receiving a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate GBR service session;
determining a dynamic maximum data burst capacity MDBV strategy applicable to the GBR service, and sending an indication message carrying the dynamic MDBV strategy to a radio access equipment (RAN);
receiving a preemption request which is sent by the RAN and used for preempting the maximum stream bit rate (MFBR), wherein the preemption request comprises a data stream identifier and a session identifier of a first data stream;
if finding that the second data flow which can be preempted in the MFBR business session and the MFBR business session exists currently, modifying the MFBR of the second data flow;
and sending 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.
Preferably, the preemption request further includes an MDBV increment, and the searching for a second data flow in the MFBR service session capable of being preempted currently includes:
determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; and the radio resource corresponding to the difference value between the modified MFBR of the second data stream and the original MFBR is larger than or equal to the radio resource corresponding to the MDBV increment.
Preferably, when the first data stream and the second data stream are both downlink data streams, the method further comprises:
transmitting the data flow identifier, the session identifier and the modified MFBR of the second data flow to a user plane function entity UPF, so that the UPF determines a 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;
receiving a parameter changed message sent by the RAN;
receiving a parameter restored message sent by the RAN, wherein the parameter restored message is sent by the RAN after the completion of forwarding the first data stream according to the modified MDBV;
and sending a message indicating recovery parameters to the UPF so that the UPF forwards the second data stream according to the original MFBR.
As a second aspect of the present disclosure, there is provided a data flow parameter dynamic configuration method, including:
receiving an indication message sent by a session management function entity SMF;
if a first data stream is currently forwarded to a user terminal and the data packet delay budget PDB of the first data stream is detected to be unable to be guaranteed, a preemption request for preempting the data stream of the MFBR is sent to the SMF, wherein the preemption request comprises a data stream identifier and a session identifier of the first data stream;
and receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF, modifying the MDBV of the first data flow according to the increment of the preset dynamic maximum data burst capacity MDBV, and forwarding the first data flow according to the modified MDBV.
Preferably, after receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF, the method further includes:
determining a corresponding second data stream according to the data stream identifier and the session identifier, and forwarding the second data stream according to the modified MFBR;
and sending a parameter changed message to the SMF.
Preferably, the method further comprises:
after the first data stream is forwarded, forwarding the first data stream according to an original MDBV, and forwarding the second data stream according to an original MFBR;
and sending a parameter restored message to the SMF.
As a third aspect of the present disclosure, there is provided a session management functional entity, including:
the receiving module is used for receiving a request sent by the user terminal for creating or modifying the delay-sensitive guaranteed bit rate GBR service session;
a determining module, configured to determine a 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 a radio access equipment RAN;
the receiving module is further configured to receive a preemption request for preempting a data stream of the maximum stream bit rate MFBR sent by the RAN, where the preemption request includes a data stream identifier and a session identifier of the first data stream;
a modifying module, configured to modify an MFBR of a second data flow if it is found that the MFBR service session and the second data flow in the MFBR service session can be preempted currently;
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.
Preferably, the preemption request includes an MDBV increment, and the modifying module searches for a second data flow currently capable of being preempted in the MFBR service session and the MFBR service session, including:
determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; and the radio resource corresponding to the difference value between the modified MFBR of the second data stream and the original MFBR is larger than or equal to the radio resource corresponding to the MDBV increment.
Preferably, when the first data stream and the second data stream are both downlink data streams, the sending module is further configured to send the data stream identifier, the session identifier, and the modified MFBR of the second data stream to a user plane function entity UPF, so that the UPF determines a corresponding second data stream according to the data stream identifier and the session identifier, and forwards the second data stream according to the modified MFBR;
the receiving module is also used for receiving a parameter changed message sent by the RAN; receiving a parameter restored message sent by the RAN, wherein the parameter restored message is sent by the RAN after the completion of forwarding the first data stream according to the modified MDBV;
the sending module is further configured to send a message indicating recovery parameters to the UPF, so that the UPF forwards the second data stream according to the original MFBR.
As a fourth aspect of the present disclosure, there is provided a wireless access device including:
the receiving module is used for receiving the indication message sent by the session management function entity SMF;
and the sending module is used for sending a preemption request for preempting the data flow of the MFBR to the SMF if the first data flow is forwarded to the user terminal currently and the packet delay budget PDB of the first data flow is detected to be unable to be ensured, wherein the preemption request comprises the data flow identifier and the session identifier of the first data flow.
The receiving module is also used for receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF;
the modification module is used for modifying the MDBV of the first data flow according to the preset increment of the dynamic maximum data burst capacity MDBV;
and the first forwarding module is used for forwarding the first data flow according to the modified MDBV.
Preferably, the method further comprises:
the determining module is used for determining a corresponding second data stream according to the data stream 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 further configured to send a parameter changed message to the SMF.
Preferably, the method further comprises:
the third forwarding module is used for forwarding the first data stream according to the original MDBV after the first data stream is forwarded;
a fourth forwarding module, configured to forward the second data flow according to an original MFBR;
the sending module is further configured to send a parameter restored message to the SMF.
In the embodiment of the disclosure, after the SMF sends an indication message carrying a dynamic MDBV policy to the radio access equipment RAN, the SMF receives a request for sending a data stream preempting the maximum stream bit rate MFBR, which indicates that the first data stream currently being forwarded by the RAN is a data stream requiring an MDBV increase. If the SMF finds that the second data flow which can be preempted in the MFBR business session and the MFBR business session exists currently, the MFBR of the second data flow is modified, and the data flow identification, the session identification and the 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.
Drawings
Fig. 1 is a flowchart of a method for dynamically configuring data flow parameters according to an embodiment of the present disclosure;
FIG. 2 is another flow chart of a method for dynamically configuring data flow parameters according to an embodiment of the present disclosure;
fig. 3 is a signaling diagram of a dynamic configuration method for data flow parameters according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a session management functional entity according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a wireless access device according to an embodiment of the present disclosure.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present disclosure, the present disclosure will be described in further detail with reference to the accompanying drawings and detailed description.
For delay sensitive GBR traffic, when the delay experienced by the QoS flow due to the core network may cause the packet to reach the user UE beyond a predetermined PDB, forwarding is performed in bursts to ensure that the PDB requirements of the QoS flow are met, but with a preset MDBV the packet beyond the PDB will likely be exceeded. In order to solve the problem that the method of temporarily applying extra MDBV to PCF to meet the requirement in the prior art is difficult to timely eliminate the influence of bursty time delay on time-sensitive services and exceeds the preset PDB. The disclosure provides a dynamic configuration method for data flow parameters, a session management functional entity and wireless access equipment. The following detailed description is provided with reference to the accompanying drawings of the embodiments provided by the present disclosure, respectively.
Fig. 1 shows a flowchart of a data flow parameter dynamic configuration method provided by an embodiment of the present disclosure. The dynamic configuration method of the data stream parameters can be applied to the session management functional entity and is also applicable to the uplink data stream forwarding and the downlink data stream forwarding. As shown in fig. 1, the method for dynamically configuring data flow parameters provided in this embodiment includes the following steps.
Step 101, a request sent by a user terminal for creating or modifying a delay-sensitive GBR service session is received.
Step 102, determining a dynamic MDBV policy applicable to the GBR service.
And step 103, sending an indication message carrying the dynamic MDBV strategy to the RAN.
In this step, the SMF sends an indication message carrying the dynamic MDBV policy to the RAN to cause the RAN to configure GBR traffic according to the dynamic MDBV policy.
Step 104, a preemption request sent by the RAN to preempt the data stream of the maximum stream bit rate MFBR is received.
The first data flow is a QoS flow, the first data flow is delayed by the core network, 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.
If it is found that there is a second data flow currently capable of being preempted in the MFBR service session and the MFBR service session, then the MFBR of the second data flow is modified, step 105.
And step 106, transmitting the data flow identification, the session identification 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.
In the embodiment of the disclosure, after the SMF sends an indication message carrying a dynamic MDBV policy to the radio access equipment RAN, the SMF receives a request for sending a data stream preempting the maximum stream bit rate MFBR, which indicates that the first data stream currently being forwarded by the RAN is a data stream requiring an MDBV increase. If the SMF finds that the second data flow which can be preempted in the MFBR business session and the MFBR business session exists currently, the MFBR of the second data flow is modified, and the data flow identification, the session identification and the 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.
Further, the preemption request includes an MDBV increment, and in step 104, searching for a second data flow currently capable of being preempted in the MFBR service session and the MFBR service session includes:
determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; wherein, the radio resource corresponding to the difference value between the modified MFBR and the original MFBR of the second data stream is greater than or equal to the radio resource corresponding to the MDBV increment.
In this step, for example, the MFBR of the data stream is 10MB/s, but the data stream is currently transmitted using only 2MB/s, and thus, the data stream may be a data stream that can currently be preempted by the MFBR, and the MFBR of the data stream may be modified to any value between 2MB/s or more and 10MB/s or less. And, a second data flow is determined according to the MDBV increment, and an MFBR service session corresponding to the second data flow is determined. For example, if the MDBV is increased by 4MB/s, the difference between the MFBR of the modified second data stream and 10MB/s should be greater than or equal to 4MB/s, and the MFBR of the modified second data stream is an arbitrary value between greater than or equal to 2MB/s and less than or equal to 6MB/s, so that the radio resources corresponding to the MFBR of the second data stream are only sufficient to be allocated to the first data stream. A data stream that can currently be preempted by the MFBR that satisfies the above condition is selected as the second data stream. The first data flow is a QoS flow.
Further, when the first data stream and the second data stream are both downlink data streams, the method further includes:
and sending the data flow identifier, the session identifier and the modified MFBR of the second data flow to a user plane function 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.
And receiving the parameter changed message sent by the RAN.
And receiving a parameter restored message sent by the RAN, wherein the parameter restored message is sent by the RAN after the completion of forwarding the first data stream according to the modified MDBV.
And sending a message indicating recovery parameters to the UPF so that the UPF forwards the second data stream according to the original MFBR.
Fig. 2 shows another flowchart of a data flow parameter dynamic configuration method provided by an embodiment of the present disclosure. The dynamic configuration method of the data stream parameters can be applied to wireless access equipment and is simultaneously applicable to uplink data stream forwarding and downlink data stream forwarding. As shown in fig. 2, the method for dynamically configuring data flow parameters provided in 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 stream is currently being forwarded to the user terminal and it is detected that the PDB of the first data stream cannot be guaranteed, a preemption request for preempting the data stream of the MFBR is sent to the SMF.
The preemption request comprises a data flow identifier and a session identifier of a first data flow, wherein the first data flow is a QoS flow.
And 203, receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF.
In step 204, the MDBV of the first data stream is modified according to the predetermined increment of the dynamic maximum data burst size MDBV.
And step 205, forwarding the first data stream according to the modified MDBV.
In the embodiment of the present disclosure, after receiving an indication message sent by a session management function entity SMF, if the RAN detects that a first data stream currently being forwarded is a data stream requiring to increase an MDBV, the RAN sends a preemption request for preempting a data stream with a maximum stream bit rate MFBR to the SMF. The RAN receives the data flow identification, the session identification 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. 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.
Further, after receiving the data flow identifier, the session identifier, and the modified MFBR sent by the SMF (i.e. step 203), the method further includes: determining a corresponding second data stream according to the data stream identifier and the session identifier, and forwarding the second data stream according to the modified MFBR; and sending a parameter changed message to the SMF.
Further, the method further comprises: after the first data stream is forwarded, forwarding the first data stream according to the original MDBV, and forwarding the second data stream according to the original MFBR; and sending a parameter restored message to the SMF.
Fig. 3 shows a signaling diagram of a method for dynamically configuring data flow parameters according to an embodiment of the present disclosure. In order to more clearly understand the technical solution of the present disclosure, the method for dynamically configuring data flow parameters provided in this embodiment is described in detail with reference to a signaling diagram shown in fig. 3.
Step (1), the user terminal sends a request to the SMF for creating or modifying a delay-sensitive GBR traffic session.
And (2) the SMF determines a dynamic MDBV strategy applicable to the GBR service.
In this step, the SMF determines the dynamic MDBV policy applicable to GBR traffic in two ways. The first way is that the SMF requests dynamic service rules from PCF, inquires whether GBR service of current user is suitable for dynamic MDBV strategy, if PCF determines whether GBR service of user terminal is suitable for dynamic MDBV strategy according to mobile communication network configuration scheduling strategy, then sends indication message of suitable dynamic MDBV strategy to SMF. In the second way, the SMF determines, according to the locally configured policy, a dynamic MDBV policy applicable to the user terminal.
And (3) the SMF sends an indication message carrying the dynamic MDBV strategy to the RAN.
In this step, the SMF sends an indication message carrying the dynamic MDBV policy to the RAN, so that the RAN configures GBR traffic currently being forwarded according to the dynamic MDBV policy.
And (4) if the RAN is forwarding the first data stream to the user terminal currently and the PDB of the first data stream is detected to be unable to be guaranteed, sending a preemption request for preempting the data stream of the MFBR to the SMF.
The preemption request comprises a data flow identifier and a session identifier of a first data flow, wherein the first data flow is a QoS flow.
In this step, if the PDB of the first data flow currently being forwarded by the RAN to the user terminal cannot be guaranteed, that is, it indicates that the preset MDBV needs to be increased at the same time, the first data flow may cause packet loss due to the delay of the core network. The RAN sends a preemption request to the SMF to preempt the MFBR's data flow. Radio resources capable of preempting the data stream of the MFBR are allocated to the first data stream for 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, and ensure the PDB of the first data stream. The preemption request also comprises a preset MDBV increment.
And (5), if the SMF finds that the second data flow which can be preempted in the MFBR business session and the MFBR business session exists currently, modifying 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, the QoS requirement of the data flow of the GBR service can be satisfied as long as the forwarding rate of the data flow of the GBR service is guaranteed not to be lower than the GFBR. For example, the MFBR of the data stream is 10MB/s, but the data stream is currently transmitted using only 2MB/s, and thus, the data stream may be a data stream that can currently be preempted by the MFBR, and the MFBR of the data stream may be modified to any value between 2MB/s or more and 10MB/s or less. And determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; wherein, the radio resource corresponding to the difference value between the modified MFBR and the original MFBR of the second data stream is greater than or equal to the radio resource corresponding to the MDBV increment. For example, if the MDBV is increased by 4MB/s, the difference between the MFBR of the modified second data stream and 10MB/s should be greater than or equal to 4MB/s, and the MFBR of the modified second data stream is an arbitrary value between greater than or equal to 2MB/s and less than or equal to 6MB/s, so that the radio resources corresponding to the MFBR of the second data stream are only sufficient to be allocated to the first data stream. Selecting a data stream that satisfies the above condition and that can currently be preempted by the MFBR as the second data stream will decrease the MFBR of the second data stream. The second data flow is a QoS flow.
In a preferred embodiment, the SMF searches for a second data stream that can currently be preempted by the MFBR, and may pre-designate a data stream, a data stream that is counted by the network, or a data stream that is selected by the user.
It should be noted that there may be multiple second data flows, that is, multiple second data flows are searched at the same time, and MFBR of the multiple second data flows is reduced at the same time, so as to satisfy that radio resources corresponding to the multiple second data flows MFBR are allocated to the first data flow sufficiently.
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 further sends a data flow identifier and a session identifier of the first data flow to the RAN for indicating that the SMF is preempting the MFBR for the first data flow, i.e. the mapping between the first data flow and the second data flow preempting the MFBR and the modified MFBR is sent to the SMF.
Step (7), the RAN modifies the MDBV of the first data flow according to the preset MDBV increment.
In this step, since the RAN presets the MDBV increment and the second data flow found by the SMF is also determined based on the MDBV increment, when the RAN receives the data flow identifier, the session identifier, and the modified MFBR of the second data flow sent by the SMF, it indicates that the SMF has found a second data flow that can be preempted by the MFBR, and the RAN may increment the MDBV of the first data flow being forwarded by the preset MDBV increment. That is, the allocation of radio resources corresponding to the MFBR of the second data stream to the first data stream is realized, so as to improve the MDBV of the first data stream.
And (8) the RAN forwards the first data flow according to the modified MDBV.
And (9) the RAN determines a corresponding second data stream according to the data stream identification and the session identification.
The RAN forwards the second data stream according to the modified MFBR, step (10).
Step (11), the RAN sends a parameter changed message to the SMF.
And (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.
Step (13), the RAN sends a parameter restored message to the SMF.
The steps (1) to (13) are applicable to both upstream forwarding and downstream forwarding.
In a preferred implementation, if the embodiment of the disclosure is only applicable to downstream forwarding, step (6) further includes the SMF sending the data flow identifier, the session identifier, and the modified MFBR of the second data flow to the UPF. UPF is a device on the core network side. When the UPF receives the data flow identifier, the session identifier and the modified MFBR sent by the SMF, determining a corresponding second data flow according to the data flow identifier and the session identifier, forwarding the second data flow according to the modified MFBR, and sending an MFBR parameter configured message to the SMF by the UPF. After step (13), it indicates that the first data flow on the RAN side has been forwarded, and that both the MDBV and the MFBR of the first data flow have been restored, at which point the SMF sends a message indicating restoration parameters to the UPF, and the UPF may forward the second data flow according to the original MFBR, and the UPF sends a message indicating restoration of MFBR parameters to the SMF.
It should be noted that, if the embodiments of the present disclosure are only applicable to forwarding the downlink data stream, the corresponding user terminal of the second data stream must be in the same radio resource allocation area, for example, the same sector, as the first data stream. If the terminal corresponding to the second data flow leaves the current resource coverage area because of movement, the newly created session MFBR 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 may increase the MFBR of the newly created session. In performing steps (8) -10) and UPF forwarding the second data stream according to the modified MFBR, if the terminal corresponding to the first data stream leaves the current resource coverage area because of movement, the SMF may select a third data stream in the new coverage area to satisfy the need of the first data stream for the MDVB and simultaneously restore the MFBR of the second data stream. If the embodiment of the disclosure is suitable for forwarding the uplink data stream, all the uplink data streams are sourced from the same user terminal, so that it is not necessary to determine whether the first data stream and the second data stream are in the same resource allocation region, because the first data stream and the second data stream are always in the same resource allocation region.
Fig. 4 shows a schematic structural diagram of a session management functional 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 functional entity provided by the embodiment of the disclosure includes the following modules.
A receiving module 11, 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 12, configured to determine a dynamic maximum data burst capacity MDBV policy applicable to the GBR service.
A sending module 13, configured to send an indication message carrying the dynamic MDBV policy to the radio access equipment RAN.
The receiving module 11 is further configured to receive a preemption request sent by the RAN for preempting a data stream of the maximum stream bit rate MFBR, where the preemption request includes a data stream identifier and a session identifier of the first data stream.
A modifying module 14, configured to modify the MFBR of the second data flow if the second data flow capable of being preempted in the MFBR service session and the MFBR service session is found.
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 first data flow according to the modified MDBV.
Preferably, the preemption request includes an MDBV increment, and the modifying module searches for a second data flow currently capable of being preempted in the MFBR service session and the MFBR service session, including:
determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; and the radio resource corresponding to the difference value between the modified MFBR of the second data stream and the original MFBR is larger than or equal to the radio resource corresponding to the 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, the session identifier, and the modified MFBR of the second data flow to the user plane function entity UPF, so that the UPF determines a 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 further configured to receive a parameter changed message sent by the RAN; and receiving a parameter restored message sent by the RAN, wherein the parameter restored message is sent by the RAN after the completion of forwarding the first data stream according to the modified MDBV.
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 stream according to the original MFBR.
Fig. 5 illustrates a schematic structural diagram of a wireless access device provided in 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 disclosure includes the following modules.
A receiving module 21, configured to receive an indication message sent by the session management function entity SMF.
And the sending module 22 is configured to send, 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 for preempting the data flow of the MFBR to the SMF, where the preemption request includes a data flow identifier and a session identifier of the first data flow.
The receiving module 21 is further configured to receive the data flow identifier, the session identifier, 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 size MDBV increment.
A first forwarding module 24, configured to forward the first data flow according to the modified MDBV.
Preferably, the method further comprises:
and the determining module is used for determining a corresponding second data flow according to the data flow identifier and the session identifier.
And the second forwarding module is used for forwarding the second data flow according to the modified MFBR.
The sending module is further configured to send a parameter changed message to the SMF.
Preferably, the method further comprises:
and the third forwarding module is used for forwarding the first data stream according to the original MDBV after the first data stream is forwarded.
And the fourth forwarding module is used for forwarding the second data flow according to the original MFBR.
The sending module is further configured to send a parameter restored message to the SMF.
It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.
Claims (8)
1. A method for dynamically configuring parameters of a data stream, comprising:
receiving a request sent by a user terminal for creating or modifying a delay-sensitive guaranteed bit rate GBR service session;
determining a dynamic maximum data burst capacity MDBV strategy applicable to the GBR service, and sending an indication message carrying the dynamic MDBV strategy to a radio access equipment (RAN);
receiving a preemption request of preempting a data stream of a maximum stream bit rate (MFBR) sent by a RAN, wherein the preemption request comprises a data stream identifier and a session identifier of a first data stream;
if finding that the second data flow which can be preempted in the MFBR business session and the MFBR business session exists currently, modifying the MFBR of the second data flow;
transmitting 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; the preemption request further includes an MDBV increment, and the finding that there is a second data flow in the MFBR service session that can be preempted currently and the MFBR service session includes:
determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; and the radio resource corresponding to the difference value between the modified MFBR of the second data stream and the original MFBR is larger than or equal to the radio resource corresponding to the MDBV increment.
2. The method of dynamic configuration of data stream parameters according to claim 1, wherein when the first data stream and the second data stream are both downstream data streams, the method further comprises:
transmitting the data flow identifier, the session identifier and the modified MFBR of the second data flow to a user plane function entity UPF, so that the UPF determines a 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;
receiving a parameter changed message sent by the RAN;
receiving a parameter restored message sent by the RAN, wherein the parameter restored message is sent by the RAN after the completion of forwarding the first data stream according to the modified MDBV;
and sending a message indicating recovery parameters to the UPF so that the UPF forwards the second data stream according to the original MFBR.
3. A method for dynamically configuring parameters of a data stream, comprising:
receiving an indication message sent by a session management function entity SMF;
if a first data stream is currently forwarded to a user terminal and the data packet delay budget PDB of the first data stream is detected to be unable to be guaranteed, sending a preemption request for preempting the data stream with the maximum stream bit rate MFBR to an SMF, wherein the preemption request comprises a data stream identifier and a session identifier of the first data stream;
receiving a data flow identifier, a session identifier and a modified MFBR sent by an SMF, modifying the MDBV of the first data flow according to a preset dynamic maximum data burst capacity MDBV increment, and forwarding the first data flow according to the modified MDBV; after receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF, the method further includes:
determining a corresponding second data stream according to the data stream identifier and the session identifier, and forwarding the second data stream according to the modified MFBR;
and sending a parameter changed message to the SMF.
4. A method for dynamically configuring data flow parameters according to claim 3, wherein the method further comprises:
after the first data stream is forwarded, forwarding the first data stream according to an original MDBV, and forwarding the second data stream according to an original MFBR;
and sending a parameter restored message to the SMF.
5. A session management functional entity, comprising:
the receiving module is used for receiving a request sent by the user terminal for creating or modifying the delay-sensitive guaranteed bit rate GBR service session;
a determining module, configured to determine a 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 a radio access equipment RAN;
the receiving module is further configured to receive a preemption request for preempting a data stream of the maximum stream bit rate MFBR sent by the RAN, where the preemption request includes a data stream identifier and a session identifier of the first data stream;
a modifying module, configured to modify an MFBR of a second data flow if it is found that the MFBR service session and the second data flow in the MFBR service session can be preempted currently;
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; the preemption request further includes an MDBV increment, and the modification module searches a second data flow in the MFBR service session which can be preempted currently and the MFBR service session, including:
determining a second data flow according to the MDBV increment, and determining an MFBR service session corresponding to the second data flow; and the radio resource corresponding to the difference value between the modified MFBR of the second data stream and the original MFBR is larger than or equal to the radio resource corresponding to the MDBV increment.
6. The session management functional entity of 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 a data flow identifier, a session identifier, and a modified MFBR of the second data flow to a user plane functional entity UPF, so that the UPF determines a 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 for receiving a parameter changed message sent by the RAN; receiving a parameter restored message sent by the RAN, wherein the parameter restored message is sent by the RAN after the completion of forwarding the first data stream according to the modified MDBV;
the sending module is further configured to send a message indicating recovery parameters to the UPF, so that the UPF forwards the second data stream according to the original MFBR.
7. A wireless access device, comprising:
the receiving module is used for receiving the indication message sent by the session management function entity SMF;
a sending module, configured to send, if a first data stream is currently being forwarded to a user terminal and it is detected that a packet delay budget PDB of the first data stream cannot be guaranteed, a preemption request for preempting a data stream of an MFBR to an SMF, where the preemption request includes a data stream identifier and a session identifier of the first data stream;
the receiving module is also used for receiving the data flow identifier, the session identifier and the modified MFBR sent by the SMF;
the modification module is used for modifying the MDBV of the first data flow according to the preset increment of the dynamic maximum data burst capacity MDBV;
the first forwarding module is used for forwarding the first data flow according to the modified MDBV;
the determining module is used for determining a corresponding second data stream according to the data stream 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 further configured to send a parameter changed message to the SMF.
8. The wireless access device of claim 7, further comprising:
the third forwarding module is used for forwarding the first data stream according to the original MDBV after the first data stream is forwarded;
a fourth forwarding module, configured to forward the second data flow according to an original MFBR;
the sending module is further configured to send a parameter restored message to the SMF.
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