CN114423031B - Mapping method for 5G service quality flow and data radio bearer - Google Patents
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- H04W28/00—Network traffic management; Network resource management
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0252—Traffic management, e.g. flow control or congestion control per individual bearer or channel
- H04W28/0263—Traffic management, e.g. flow control or congestion control per individual bearer or channel involving mapping traffic to individual bearers or channels, e.g. traffic flow template [TFT]
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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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Abstract
The invention discloses a mapping method of 5G service quality Flow and data radio bearer, which successfully realizes the mapping of QoS Flow and DRB. The method comprises the following steps: (10) The core network sends the 5G service quality stream information which needs to be established and/or changed to the wireless access network node; (20) The wireless access network node determines a 5G service quality stream class according to the 5G service quality stream information; (30) The wireless access network node determines the mapping relation between each 5G service quality flow in each category and the data wireless bearing according to the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter; (40) The wireless access network node maps the 5G service quality stream to the existing or newly built data wireless bearing; (50) And the wireless access network node sends and receives user plane data on the corresponding data wireless network bearer according to the mapping relation between the 5G service quality stream and the data wireless bearer.
Description
Technical Field
The invention belongs to the technical field of wireless communication, in particular to a mapping method of a 5G service quality stream and a data wireless bearer.
Background
QoS (Quality of Service) is quality of service, qoS Flow is quality of service Flow.
The 5G network provides data interaction with the external data network for the UE by taking PDU Session (Protocol Data Unit Session ) as a unit, and can provide differentiated QoS guarantee for different services in a single PDU Session according to different service requirements.
In 4G networks, the network provides differentiated QoS guarantees for different services performed by the UE over EPS bearers (EPS bearers). Each EPS bearer corresponds to one S1-U bearer and one S5/S8 bearer from the core network perspective, and each EPS bearer corresponds to one data radio bearer (DRB, data Radio Bearer) from the air interface perspective. Therefore, in 4G networks, the minimum granularity of QoS control is EPS Bearer, and this granularity is embodied as a data radio Bearer on the air interface.
Compared to 4G networks, 5G networks have a great improvement in QoS control. On the core network side, the 5G cancels the concept of bearer, instead of PDU Session and QoS Flow (quality of service Flow), and each UE can support at most 256 PDU sessions, each PDU Session can support at most 64 QoS flows, and at the same time, a new 5QI is added, and further, the network can provide finer QoS Flow control for the UE, and correspondingly, on the air interface side, the 5G expands the number of DRBs that the UE can support to 29, and each DRB is uniquely affiliated to a certain PDU Session.
As can be seen from the foregoing description, the number of DRBs that can be supported by the UE is not equal to the number of PDU sessions and QoS flows that can be supported by the UE, and each DRB needs to be able to carry multiple QoS flows. For this reason, 3GPP introduced a new protocol layer SDAP (Service Data Adaptation Protocol) exclusively at L2 in the 5G network to complete the operations related to "QoS Flow and DRB mapping".
From the perspective of the 3GPP protocol, the 3GPP specifies the requirements and necessity of QoS Flow and DRB mapping, and the SDAP protocol provides a required tool for realizing QoS Flow and DRB mapping. However, the 3GPP protocol does not specify how to implement the mapping of QoS Flow and DRB, but leaves each communication device vendor to implement autonomously. Thus, the prior art has the following problems: a reasonable algorithm needs to be additionally introduced to complete mapping between QoS flows and DRBs, otherwise, qoS flows can only be mapped one-to-one with DRBs, and once the number of QoS flows required by a service being executed by a UE exceeds the number of DRBs (up to 29 DRBs) that the UE can accommodate, a wireless network node cannot provide all services required by the UE, which can seriously affect user experience, and at the same time, seriously affect throughput of the wireless access network node and throughput of a cell.
Disclosure of Invention
The invention aims to provide a mapping method of a 5G network service quality stream and a data radio bearer, which successfully realizes the mapping of QoS Flow and DRB.
The technical solution for realizing the purpose of the invention is as follows:
a mapping method of 5G service quality flow and data radio bearer includes the following steps:
(10) And 5G quality of service stream information transmission: the core network control plane node uses control plane interface signaling to send all 5G service quality stream information to be established and/or changed 5G service quality stream information to the wireless access network node, wherein the 5G service quality stream information comprises a service quality stream identifier, a 5G service quality parameter and a 5G service quality characteristic;
(20) 5G quality of service flow class determination: the wireless access network node determines a 5G service quality stream category according to the 5G service quality parameter and the 5G service quality characteristic and a configured transmission layer resource mapping strategy thereof;
the 5G service quality parameter comprises a 5G service quality identifier and an allocation and maintenance priority;
the 5G service quality characteristics comprise a data packet delay budget, a data packet error rate, a resource type, an average value calculation window and a maximum data burst capacity corresponding to the 5G service quality identifier;
The transmission layer resource mapping strategy comprises a mapping relation between a 5G service quality identifier and a transmission layer differential service code point and a mapping relation between the 5G service quality identifier and a virtual local area network priority;
the 5G quality of service stream class comprises 5G quality of service streams which can be mapped to the same data radio bearer and 5G quality of service streams which can only be mapped to the data radio bearer separately;
(30) And determining the mapping relation between the 5G service quality flow and the data radio bearer: the wireless access network node determines the data wireless bearing for accommodating each 5G service quality flow according to the corresponding relation between the 5G service quality configuration identifier and the data wireless bearing configuration parameter aiming at the 5G service quality flow in each category;
(40) Mapping of 5G quality of service flows to data radio bearers: the wireless access network node maps the 5G service quality stream to be built on the existing data radio bearer or the newly built data radio bearer according to the mapping relation between each 5G service quality stream and the data radio bearer, and simultaneously maps the built 5G service quality stream on other existing or newly built data radio bearers;
(50) User plane data transmission: and the wireless access network node sends and receives user plane data on the 5G service quality stream on the corresponding data wireless network bearer according to the mapping relation between the 5G service quality stream and the data wireless bearer.
Compared with the prior art, the invention has the remarkable advantages that:
mapping of QoS Flow and DRB is successfully realized: the invention firstly determines the category of each 5G service quality stream according to the 5G service quality parameters and 5G service quality characteristics of each 5G service quality stream to be established and modified and the strategy of mapping 5G service quality identifiers and transmission layer resources configured by wireless access network nodes, further determines the mapping relation between each 5G service quality stream and data wireless bearing according to the mapping relation between the 5G service quality identifiers and the data wireless bearing configuration parameters configured by the wireless access network nodes, finally, realizes the mapping from each 5G service quality stream to the data wireless bearing, and realizes the adjustment of the mapping relation from each 5G service quality stream to be modified to the data wireless bearing, thereby ensuring that the wireless access network nodes send and receive user plane data on the 5G service quality stream on the most preferable data wireless network bearing, and further optimizing the user experience and the throughput of the wireless access network nodes.
The invention is described in further detail below with reference to the drawings and the detailed description.
Drawings
Fig. 1 is a main flow chart of the mapping method of the present invention for 5G qos and data radio bearer.
Fig. 2 is a flowchart of a mapping relationship determining step between the 5G qos flows and the data radio bearers in fig. 1.
Fig. 3 is a flow chart of a first embodiment of the present invention.
Fig. 4 is a flow chart of a second embodiment of the present invention.
Fig. 5 is a flow chart of a third embodiment of the present invention.
Fig. 6 is a flow chart of a fourth embodiment of the present invention.
Fig. 7 is a flowchart of a fifth embodiment of the present invention.
Detailed Description
As shown in fig. 1, the mapping method of the present invention for mapping 5G qos flows to data radio bearers includes the following steps:
(10) And 5G quality of service stream information transmission: the core network control plane node uses control plane interface signaling to send all 5G service quality stream information to be established and/or changed 5G service quality stream information to the wireless access network node, wherein the 5G service quality stream information comprises a service quality stream identifier, a 5G service quality parameter and a 5G service quality characteristic;
(20) 5G quality of service flow class determination: the wireless access network node determines a 5G service quality stream category according to the 5G service quality parameter and the 5G service quality characteristic and a configured transmission layer resource mapping strategy thereof;
the 5G service quality parameter comprises a 5G service quality identifier and an allocation and maintenance priority;
The 5G service quality characteristics comprise a data packet delay budget, a data packet error rate, a resource type, an average value calculation window and a maximum data burst capacity corresponding to the 5G service quality identifier;
the transmission layer resource mapping strategy comprises a mapping relation between a 5G service quality identifier and a transmission layer differential service code point and a mapping relation between the 5G service quality identifier and a virtual local area network priority;
the 5G qos flow class includes 5G qos flows that can be mapped to the same data radio bearer and 5G qos flows that can only be mapped to the data radio bearer separately.
The (20) 5G quality of service stream class determination method specifically comprises the following steps:
the wireless access network node analyzes all 5G service quality characteristics of the 5G service quality flows to be established, established and modified in the protocol data unit session to which the 5G service quality flows to be established and modified belong, and classifies the 5G service quality flows with the same data packet delay budget and data packet error rate into the same category, or classifies the 5G service quality flows with the same data packet delay budget and data packet error rate into the same category; or the wireless access network node analyzes all 5G service quality characteristics of the 5G service quality flows to be established, established and modified in the protocol data unit session to which the 5G service quality flows to be established and modified belong, and classifies the 5G service quality flows with the same resource type, the same data packet delay budget and the same data packet error rate into the same category, or classifies the 5G service quality flows with the same resource type, the same data packet delay budget and the same data packet error rate into the same category.
The 5G QoS flow category which can be mapped to the same data radio bearer comprises at least two 5G QoS flows, and part or all of the parameters in the 5G QoS characteristics of the 5G QoS flows are the same, and part or all of the parameters in the 5G QoS flows are the same; the 5G qos flow class that can only be mapped solely to the data radio bearer contains only one 5G qos flow.
The wireless access network node analyzes the 5G service quality characteristic of the 5G service quality flow to be modified, and uses a new 5G service quality characteristic parameter sent by the control plane node of the core network.
Based on the 5G QoS flow category determining method, the wireless access network node evaluates the allocation and the retention priority in the 5G QoS parameters of the 5G QoS flows and classifies the 5G QoS flows with the same allocation and retention priority into the same category.
The resource types of the 5G quality of service flow include: a non-guaranteed bit rate type, a guaranteed bit rate type, and a delay-sensitive guaranteed bit rate type;
based on the 5G service quality stream category determining method, aiming at the 5G service quality stream with guaranteed bit rate type, the wireless access network node evaluates an average value calculation window in 5G service quality characteristics and classifies the 5G service quality streams with the same average value calculation window into the same category;
Based on the 5G quality of service stream category determining method, the wireless access network node evaluates the average value calculation window and the maximum data burst capacity in the 5G quality of service characteristic aiming at the time delay sensitive guaranteed bit rate type 5G quality of service stream, and classifies the 5G quality of service streams with the same average value calculation window and the same maximum data burst capacity into the same category.
Based on the 5G QoS flow category determining method, the wireless access network node evaluates the mapping relation between the 5G QoS identification of the 5G QoS flow and the transmission layer differential service code point (DSCP: differentiated Services Code Point) and the mapping relation between the 5G QoS identification and the virtual local area network Priority (VLAN Priority: virtual Local Area Network Priority), and classifies the 5G QoS flows with the same transmission layer differential service code point and virtual local area network Priority into the same category.
Based on the 5G QoS flow category determining method, the wireless access network node evaluates the wireless resource state, determines the 5G QoS flow category according to different parameters in the 5G QoS characteristics in different wireless resource states, and adjusts the 5G QoS characteristic parameters according to the changed wireless resource state, thereby adjusting the category of the existing 5G QoS flow.
The radio resource state comprises the radio resource state of the radio network node and/or the radio resource state of a cell managed by the radio network node;
the radio access network node evaluates the radio resource status based on the number of physical resource blocks available or currently in use, the number of user equipments that can be accommodated or currently accommodated, and the number of radio bearers that can be accommodated or currently accommodated.
(30) And determining the mapping relation between the 5G service quality flow and the data radio bearer: the wireless access network node determines the data wireless bearing for accommodating each 5G service quality flow according to the corresponding relation between the 5G service quality configuration identifier and the data wireless bearing configuration parameter aiming at the 5G service quality flow in each category;
as shown in fig. 2, the (30) determining the mapping relationship of the 5G qos flows includes:
(31) Configuration parameter correspondence is obtained: the wireless access network node obtains the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter;
(32) Determination of a mapping relationship between a 5G quality of service flow and a data radio bearer with a standard or predefined 5G quality of service identity: the wireless access network node determines a data wireless bearing accommodating a specific 5G service quality flow according to the category of the 5G service quality flow and the 5G service quality identifier and according to the corresponding relation between the 5G service quality identifier and the data wireless bearing configuration parameter, namely, determines the mapping relation between the 5G service quality flow and the data wireless bearing;
The step of determining (32) a mapping relationship between a 5G quality of service flow having a standard or predefined 5G quality identity and a data radio bearer comprises:
(321) The class of 5G quality of service flows is 5G quality of service flows that can only be mapped individually to data radio bearers: when the 5G service quality flow with the standard or the predefined 5G service quality identifier can only be mapped to the data radio bearer independently, the wireless access network node searches and acquires the data radio bearer configuration parameter in the corresponding relation between the 5G service quality identifier and the data radio bearer configuration parameter according to the 5G service quality identifier of the 5G service quality flow, establishes a new data radio bearer and further determines the mapping relation between the 5G service quality flow and the data radio bearer;
(322) The class of 5G quality of service flows is 5G quality of service flows that can be mapped to the same data radio bearer: when the 5G qos flow with the "standard or predefined 5G qos identifier" can be mapped to the same data radio bearer with other 5G qos flows, the radio access network node searches and obtains a data radio bearer configuration parameter in a correspondence between the 5G qos identifier and a data radio bearer configuration parameter based on the 5G qos identifier of the 5G qos flow, and if the configuration parameter is already used for an existing data radio bearer, the 5G qos flow will be mapped to the existing data radio bearer, otherwise, the 5G qos flow will be mapped to a newly established data radio bearer.
(33) Determination of 5G quality of service flow with dynamic 5G quality of service identification and data radio bearer mapping relation: and the wireless access network node determines the mapping relation between the 5G service quality stream with the dynamic 5G service quality identifier and the data wireless bearing according to the category of the 5G service quality stream.
The step of determining the mapping relation of the dynamic quality identification (33) comprises the following steps:
(331) The class of 5G quality of service flows is 5G quality of service flows that can only be mapped individually to data radio bearers: when the 5G service quality flow with the dynamic 5G service quality identifier can only be mapped to a data radio bearer independently, the wireless access network node judges whether a protocol data unit session to which the 5G service quality flow belongs has a default data radio bearer, and when the protocol data unit session has the default data radio bearer, the 5G service quality flow is mapped to the default data radio bearer; otherwise, the wireless access network node refuses the request for establishing or modifying the 5G service quality flow;
(332) The class of 5G quality of service flows is 5G quality of service flows that can be mapped to the same data radio bearer: when the 5G qos flows with the "dynamic 5G qos identity" can be mapped to the same data radio bearer as other 5G qos flows, if at least one of the 5G qos flows is affiliated with an existing data radio bearer, the 5G qos flows with the "dynamic 5G qos identity" will be mapped to the existing data radio bearer, otherwise, if none of the 5G qos flows is affiliated with the existing data radio bearer, the same operation as the 5G qos flows that can only be mapped to the data radio bearer alone is adopted.
(40) Mapping of 5G quality of service flows to data radio bearers: the wireless access network node maps the 5G service quality stream to be built on the existing data radio bearer or the newly built data radio bearer according to the mapping relation between each 5G service quality stream and the data radio bearer, and simultaneously maps the built 5G service quality stream on other existing or newly built data radio bearers;
(50) User plane data transmission: and the wireless access network node sends and receives user plane data on the 5G service quality stream on the corresponding data wireless network bearer according to the mapping relation between the 5G service quality stream and the data wireless bearer.
Embodiment one:
as shown in fig. 3, this embodiment describes a mapping method, system and apparatus of a 5G quality of service Flow (5G QoS Flow) and a data radio bearer (DRB: data Radio Bearer) in a non-resource limited scenario, so as to determine a specific mapping relationship between the 5G quality of service Flow and the data radio bearer in the non-resource limited scenario.
The non-resource-constrained scenario refers to a situation where radio resources of the radio access network node (Radio Access Network Node: gNB) are sufficient, in particular, the radio resources refer to the number of available physical resource blocks (PRB: physical Resource Block) of the radio network node, the number of User equipments (UE: user Equipment) that the radio network node can accommodate, the number of data radio bearers that the radio network node can accommodate, etc., or the number of available physical resource blocks of a cell on the radio network node, the number of User equipments that the cell on the radio network node can accommodate, the number of radio bearers (signaling radio bearers (SRBs: signalling Radio Bearer) that the cell on the radio network node can accommodate, etc.
The core network control plane node uses control plane interface signaling to send all 5G QoS flow information to be established to a radio access network node, wherein the 5G QoS flow information comprises a QoS flow identifier (QoS Flow Identifier), a 5G QoS Parameter (5G QoS Parameter) and a 5G QoS feature (5G QoS Characteristics).
The radio access network node determines a 5G quality of service flow which can be mapped to the same data radio bearer and a 5G quality of service flow which can only be mapped to the data radio bearer separately according to the 5G quality of service parameter and the 5G quality of service characteristic.
The 5G quality of service parameters include a 5G quality of service identifier (5QI:5G QoS Identifier) and an allocation and retention priority (ARP: allocation and Retention Priority), and the 5G quality of service characteristics include a packet delay budget (PDB: packet Delay Budget) and a packet error rate (Packet Error Rate) corresponding to the 5G quality of service identifier.
The radio access network node analyzes 5G quality of service characteristics of all 5G quality of service flows to be established and established within a protocol data unit Session (PDU Session: protocol Data Unit Session) to which the 5G quality of service flows to be established belong, and determines 5G quality of service flows having the same or an order of magnitude of the same packet delay budget and packet error rate based on the packet delay budget and packet error rate, and in particular, the 5G quality of service flows may be mapped to the same data radio bearer.
Preferably, the radio access network node may further evaluate the allocation and retention priorities in the 5G quality of service parameters on the basis of the packet delay budget and the packet error rate, thereby determining 5G quality of service flows having the same allocation and retention priorities, having the same or an order of magnitude of the packet delay budget and the packet error rate, in particular, the 5G quality of service flows may be mapped to the same data radio bearer.
In particular, while 5G quality of service flows that can be mapped to the same data radio bearer are determined, 5G quality of service flows that can only be mapped to the data radio bearer alone are also determined.
The wireless access network node determines the final mapping relation between the 5G service quality flow and the data wireless bearing, and mainly comprises the following steps:
1. the wireless access network node obtains the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter;
2. the radio access network node determines a mapping relation between a 5G quality of service flow with a "standard or predefined 5G quality of service identity" and a data radio bearer:
(1) If the 5G service quality flow with the standard or the predefined 5G service quality identifier can only be mapped to the data radio bearer independently, the wireless access network node acquires the data radio bearer configuration parameter in the corresponding relation between the configured 5G service quality identifier and the data radio bearer configuration parameter according to the 5G service quality identifier, so as to establish a new data radio bearer, and finally, the 5G service quality flow is mapped to the newly-established data radio bearer;
(2) If the 5G quality of service flow with the "standard or predefined 5G quality of service identifier" can be mapped to the same data radio bearer as other 5G quality of service flows, the radio access network node determines, according to the correspondence between the configured 5G quality of service identifier and the data radio bearer configuration parameters, the data radio bearer to which the 5G quality of service flow is ultimately mapped:
1) According to the corresponding relation between the 5G service quality identifiers configured by the wireless access network node and the data wireless bearing configuration parameters, if the 5G service quality identifiers of the 5G service quality flows which can be mapped to the same data wireless bearing correspond to the same data wireless bearing configuration parameters, the 5G service quality flows are mapped to the same data wireless bearing; if the 5G QoS identities of the 5G QoS flows that can be mapped to the same data radio bearer correspond to different radio bearer configuration parameters, respectively, then the 5G QoS flows will be mapped to different data radio bearers;
2) The 5G quality of service flow will be mapped onto an existing data radio bearer if the selected data radio bearer configuration parameters have been used for the data radio bearer, otherwise the radio network access node will establish a new data radio bearer and map the 5G quality of service flow onto the data radio bearer.
3. The radio access network node determines a mapping relation between a 5G service quality stream with a dynamic 5G service quality identifier and a data radio bearer:
(1) If the 5G service quality flow with the dynamic 5G service quality identifier can only be mapped to a data radio bearer independently, the wireless access network node judges whether a protocol data unit session to which the 5G service quality flow belongs has a default data radio bearer, and if the protocol data unit session has the default data radio bearer, the 5G service quality flow is mapped to the default data radio bearer; otherwise, the wireless access network node refuses the establishment request of the 5G service quality flow;
(2) If the 5G QoS flows with the dynamic 5G QoS identifier can be mapped to the same data radio bearer with other 5G QoS flows, if at least one of the 5G QoS flows is affiliated with the existing data radio bearer, the 5G QoS flows with the dynamic 5G QoS identifier will be mapped to the existing data radio bearer, otherwise, if none of the 5G QoS flows is affiliated with the existing data radio bearer, the mapping relation between the 5G QoS flows and the data radio bearer is determined by adopting the method described in 3- (1);
And the wireless access network node maps each 5G service quality stream to a corresponding data radio bearer according to the determined mapping relation between the 5G service quality stream and the data radio bearer, and further sends and receives user plane data on the 5G service quality stream on the corresponding data radio bearer.
Embodiment two:
as shown in fig. 4, this embodiment describes a mapping method, system and apparatus for a 5G qos flow and a data radio bearer in a resource constrained scenario, so as to determine a specific mapping relationship between the 5G qos flow and the data radio bearer in the resource constrained scenario.
The radio resources refer to the available physical resource block number of the radio network node, the number of user equipment which can be accommodated by the radio network node, the number of data radio bearers which can be accommodated by the radio network node, etc., or the available physical resource block number of a cell on the radio network node, the number of user equipment which can be accommodated by the cell on the radio network node, the number of radio bearers (signaling radio bearers and data radio bearers) which can be accommodated by the cell on the radio network node;
the resource limitation refers to: the number of user equipments of the radio access network node, the number of data radio bearers of the user equipments increase, which results in that the number of available physical resource blocks of the radio access network node or a cell on the radio access network node, the number of user equipments that can continue to be accommodated or the number of data radio bearers that can continue to be accommodated is below a certain threshold, or the number of physical resource blocks currently being used, the number of current user equipments or the number of current data radio bearers is above a certain threshold.
And the core network control plane node uses control plane interface signaling to send all 5G service quality stream information to be established to the wireless access network node, wherein the 5G service quality stream information comprises a service quality stream identifier, a 5G service quality parameter and a 5G service quality characteristic.
The radio access network node determining a 5G quality of service flow which can be mapped to the same data radio bearer and a 5G quality of service flow which can only be mapped to the data radio bearer separately according to the 5G quality of service parameter and the 5G quality of service feature, comprising:
the 5G quality of service parameters include a 5G quality of service identifier and an allocation and retention priority, the 5G quality of service characteristics include a Resource Type (Resource Type), a packet delay budget, and a packet error rate corresponding to the 5G quality of service identifier, wherein the Resource Type includes a guaranteed bit rate (GBR: guaranteed Bit Rate) Type, a Non-guaranteed bit rate (Non-Guaranteed Bit Rate) Type, and a delay-sensitive guaranteed bit rate (Delay Critical Guaranteed Bit Rate) Type;
the wireless access network node analyzes 5G service quality characteristics of all 5G service quality flows to be established and established in a protocol data unit session to which the 5G service quality flow to be established belongs, and determines the 5G service quality flows with the same resource type, the same or the same data packet delay budget and the same data packet error rate based on the resource type, the data packet delay budget and the data packet error rate, and particularly, the 5G service quality flows can be mapped to the same data radio bearer;
Preferably, the radio access network node may further evaluate the allocation and retention priorities in the 5G quality of service parameters on the basis of the resource type, the packet delay budget and the packet error rate, thereby determining 5G quality of service flows having the same allocation and retention priorities, having the same or an identical order of magnitude of packet delay budget and packet error rate, in particular, the 5G quality of service flows being capable of being mapped to the same data radio bearer;
preferably, for a 5G qos flow with a guaranteed bit rate of the resource type, the radio access network node may further evaluate an average calculation Window (Averaging Window) length in the 5G qos feature, and for a 5G qos flow with a guaranteed bit rate of the resource type that is delay sensitive, the radio access network node may further evaluate a maximum data burst capacity (Maximum Data Burst Volume) and an average calculation Window length in the 5G qos feature, thereby determining a 5G qos flow that may be mapped to the same data radio bearer;
in particular, while 5G quality of service flows that can be mapped to the same data radio bearer are determined, 5G quality of service flows that can only be mapped to the data radio bearer alone are also determined.
The wireless access network node determines the final mapping relation between the 5G service quality flow and the data wireless bearing, and mainly comprises the following steps:
1. the wireless access network node obtains the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter;
2. the radio access network node determines a mapping relation between a 5G quality of service flow with a "standard or predefined 5G quality of service identity" and a data radio bearer:
(1) The specific mapping relation determining process comprises the following steps: see description in "embodiment one";
(2) Preferably, for a 5G qos flow with a guaranteed bit rate and a delay sensitive guaranteed bit rate resource type, the radio access network node may map the type of 5G qos flow onto a separate data radio bearer, i.e. a new data radio bearer for the 5G qos flow to be established, and map the 5G qos flow onto the new data radio bearer.
3. The radio access network node determines a mapping relationship between a 5G qos flow with a "dynamic 5G qos identifier" and a data radio bearer, wherein a specific mapping relationship determination process is described in "embodiment one".
And the wireless access network node maps each 5G service quality stream to a corresponding data wireless bearing according to the determined mapping relation between the 5G service quality stream and the data wireless bearing, and further sends and receives user plane data on the 5G service quality stream on the corresponding data wireless network bearing.
Embodiment III:
as shown in fig. 5, this embodiment describes a mapping method, system and apparatus for mapping a 5G qos flow to a data radio bearer, so as to determine a specific mapping relationship between the 5G qos flow and the data radio bearer in a radio access network.
And the core network control plane node uses control plane interface signaling to send all 5G service quality stream information to be established to the wireless access network node, wherein the 5G service quality stream information comprises a service quality stream identifier, a 5G service quality parameter and a 5G service quality characteristic.
The radio access network node determining a 5G quality of service flow which can be mapped to the same data radio bearer and a 5G quality of service flow which can only be mapped to the data radio bearer separately according to the 5G quality of service parameter and the 5G quality of service feature, comprising:
the 5G service quality parameters comprise a 5G service quality identifier and an allocation and maintenance priority, and the 5G service quality characteristics comprise a resource type, a data packet delay budget and a data packet error rate corresponding to the 5G service quality identifier;
The wireless access network node analyzes 5G service quality characteristics of all 5G service quality flows to be established and established in a protocol data unit session to which the 5G service quality flows to be established belong, determines the 5G service quality flows with the same or the same order of magnitude of data packet delay budget and data packet error rate according to the data packet delay budget and the data packet error rate in a non-resource-limited scene, or determines the 5G service quality flows with the same resource type, the same or the same order of magnitude of data packet delay budget and data packet error rate according to the resource type, the data packet delay budget and the data packet error rate in a resource-limited scene, and particularly, the 5G service quality flows can be mapped to the same data radio bearer;
preferably, on the basis of the 5G quality of service characteristic, the radio access network node may further evaluate the allocation and retention priorities in the 5G quality of service parameters, thereby determining 5G quality of service flows having the same allocation and retention priorities and/or resource types, having the same or an order of magnitude of the data packet delay budget and the data packet error rate, in particular, the 5G quality of service flows being able to be mapped to the same data radio bearer;
Preferably, based on the 5G quality of service characteristic and the 5G quality of service parameter, the radio access network node may further evaluate a mapping relationship between a 5G quality of service identifier and a transport layer differential service code point (Differentiated Services Code Point) and a mapping relationship between a 5G quality of service identifier and a virtual local area network priority (Virtual Local Area Network Priority), so as to determine a 5G quality of service flow using the same transport layer resource, having the same or partially the same 5G quality of service characteristic and 5G quality of service parameter, and in particular, the 5G quality of service flow may be mapped to the same data radio bearer;
in particular, while 5G quality of service flows that can be mapped to the same data radio bearer are determined, 5G quality of service flows that can only be mapped to the data radio bearer alone are also determined.
The wireless access network node determines the final mapping relation between the 5G service quality flow and the data wireless bearing, and mainly comprises the following steps:
1. the wireless access network node obtains the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter;
2. the radio access network node determines a mapping relation between a 5G service quality stream with a standard or predefined 5G service quality identifier and a data radio bearer, wherein the specific mapping relation is determined by referring to the description in the embodiment I;
3. The radio access network node determines a mapping relation between a 5G service quality stream with a dynamic 5G service quality identifier and a data radio bearer, wherein the specific mapping relation is determined by referring to the description in the embodiment I;
and the wireless access network node maps each 5G service quality stream to a corresponding data wireless bearing according to the determined mapping relation between the 5G service quality stream and the data wireless bearing, and further sends and receives user plane data on the 5G service quality stream on the corresponding data wireless network bearing.
Embodiment four:
as shown in fig. 6, this embodiment describes a method, a system and an apparatus for mapping a 5G qos flow to a data radio bearer, so as to adjust the mapping relationship between the 5G qos flow and the data radio bearer when the 5G qos parameter and the 5G qos feature change.
The core network control plane node sends the changed 5G service quality stream information to a wireless access network node by using control plane interface signaling, wherein the 5G service quality stream information comprises a service quality stream identifier, a 5G service quality parameter and a 5G service quality characteristic, the 5G service quality parameter is distribution and maintenance priority, and the 5G service quality characteristic is average value calculation window length and maximum data burst capacity.
The radio access network node determines the data radio bearer currently corresponding to the 5G service quality flow according to the service quality flow identifier, and adjusts the mapping relation between the existing 5G service quality flow and the data radio bearer according to the new 5G service quality parameter and the 5G service quality characteristic, including:
in a non-resource limited scenario and a resource limited scenario, the radio access network node receives new 5G quality of service parameters and 5G quality of service characteristics for a specific 5G quality of service flow from a core network control plane node;
the radio access network node analyzes all established 5G service quality flows in a protocol data unit session to which the 5G service quality flows belong according to new 5G service quality parameters, namely allocation and maintenance priorities, based on a mapping method of the 5G service quality flows and data radio bearers currently adopted by the radio access network node (see description in embodiments one to three), and further, the mapping relation between the 5G service quality flows and the data radio bearers is redetermined;
preferably, for the guaranteed bit rate of the delay sensitivity of the resource type of the 5G qos flow, the radio access network node analyzes all established 5G qos flows in the protocol data unit session to which the 5G qos flow belongs based on the mapping method of the 5G qos flow and the data radio bearer currently adopted by the radio access network node (see description in embodiments one to three) according to the maximum data burst capacity in the new 5G qos feature, and further, redetermines the mapping relationship between the 5G qos flow and the data radio bearer;
Preferably, for the resource type of the 5G qos flow is a guaranteed bit rate or a guaranteed bit rate sensitive to delay, the radio access network node calculates a window length according to an average value in a new 5G qos feature, and based on a mapping method of the 5G qos flow and a data radio bearer currently adopted by the radio access network node (see description in embodiments one to three), analyzes all established 5G qos flows in a protocol data unit session to which the 5G qos flow belongs, and further redetermines a mapping relationship between the 5G qos flow and the data radio bearer;
if the re-determined mapping relation between the 5G service quality stream and the data radio bearer is the same as the previous mapping relation, the wireless access network node continues to use the existing mapping relation between the 5G service quality stream and the data radio bearer;
if the re-determined mapping relationship between the 5G service quality stream and the data radio bearer is different from the previous mapping relationship, the radio access network node determines the final mapping relationship between the 5G service quality stream and the data radio bearer, and mainly comprises the following steps:
1. the wireless access network node obtains the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter;
2. If the 5G QoS flow has a standard or predefined 5G QoS identifier, the specific mapping relation is determined by referring to the description in the embodiment I;
3. if the 5G QoS flow has a dynamic 5G QoS identifier, the specific mapping relation is determined by referring to the description in the embodiment I;
after determining the final mapping relation between the 5G qos flows and the data radio bearers, the radio access network node maps the 5G qos flows onto other existing data radio bearers by 5G qos flow remapping (5G QoS Flow Remapping) operation, or establishes new data radio bearers for accommodating the 5G qos flows.
And the wireless access network node maps each 5G service quality stream to a corresponding data wireless bearing according to the determined mapping relation between the 5G service quality stream and the data wireless bearing, and further sends and receives user plane data on the 5G service quality stream on the corresponding data wireless network bearing.
Fifth embodiment:
as shown in fig. 7, this embodiment describes a method, a system and an apparatus for mapping a 5G qos flow to a data radio bearer, so as to adjust the mapping relationship between the 5G qos flow and the data radio bearer when the resource status of a radio access network node changes.
The radio resources refer to the available physical resource block number of the radio network node, the number of user equipment which can be accommodated by the radio network node, the number of data radio bearers which can be accommodated by the radio network node, etc., or the available physical resource block number of a cell on the radio network node, the number of user equipment which can be accommodated by the cell on the radio network node, the number of radio bearers (signaling radio bearers and data radio bearers) which can be accommodated by the cell on the radio network node;
the resource limitation refers to: the number of user equipments of the radio access network node, the number of data radio bearers of the user equipments increase, which results in that the number of available physical resource blocks of the radio access network node or a cell on the radio access network node, the number of user equipments that can continue to be accommodated or the number of data radio bearers that can continue to be accommodated is below a certain threshold, or the number of physical resource blocks currently being used, the number of current user equipments or the number of current data radio bearers is above a certain threshold.
When the radio access network node resource status is changed from non-resource limited to resource limited, the radio network node adjusts a data radio bearer containing a plurality of 5G quality of service flows on a user equipment in a protocol data unit session unit, including:
The mapping, by the radio access network node, the 5G qos flows with different resource types onto different data radio bearers based on the resource types in the 5G qos feature, where the different 5G qos flows on the data radio bearers accommodating the plurality of 5G qos flows have different resource types, includes:
the data radio bearer accommodates 5G service quality flows with the resource type of guaranteed bit rate and non-guaranteed bit rate, and then the 5G service quality flows with the resource type of guaranteed bit rate are still mapped to the data radio bearer, and the 5G service quality flows with the resource type of non-guaranteed bit rate are mapped to other existing data radio bearers or new data radio bearers;
the data radio bearer accommodates a 5G service quality stream with a resource type of time delay sensitive guaranteed bit rate and guaranteed bit rate, the 5G service quality stream with the resource type of time delay sensitive guaranteed bit rate is still mapped to the data radio bearer, and the 5G service quality stream with the resource type of guaranteed bit rate is mapped to other existing data radio bearers or new data radio bearers;
The data radio bearer accommodates 5G service quality flows with the resource types of time delay sensitive guaranteed bit rate, guaranteed bit rate and non-guaranteed bit rate, and then the 5G service quality flows with the resource types of time delay sensitive guaranteed bit rate are still mapped to the data radio bearer, and the 5G service quality flows with the resource types of the guaranteed bit rate and the non-guaranteed bit rate are mapped to other existing data radio bearers or new data radio bearers respectively;
preferably, for a 5G qos flow with a guaranteed bit rate of the resource type, the radio access network node may further evaluate an average calculation window length in the 5G qos feature, and for a 5G qos flow with a guaranteed bit rate of the resource type that is delay sensitive, the radio access network node may further evaluate a maximum data burst capacity and an average calculation window length in the 5G qos feature, and further determine a data radio bearer for accommodating the 5G qos flow for the 5G qos flow separated from the original data radio bearer;
preferably, the radio access network node may additionally consider allocation and retention priority in the 5G qos parameters on the basis of the resource type, and further determine the data radio bearer for accommodating the 5G qos flow for the 5G qos flow separated from the original data radio bearer.
The radio access network node maps different 5G qos flows onto different data radio bearers based on the 5G qos characteristics, where the different 5G qos flows on the data radio bearers accommodating the plurality of 5G qos flows have the same resource type and the resource type is the guaranteed bit rate or the guaranteed bit rate sensitive to delay, and the method includes:
the data radio bearer accommodates a 5G service quality stream with a resource type of guaranteed bit rate, and the wireless access network node maps the 5G service quality stream with a longer average value calculation window length to other existing data radio bearers or new data radio bearers according to the average value calculation window length in the 5G service quality characteristic;
the data radio bearer accommodates a 5G service quality stream with a resource type of time delay sensitive guaranteed bit rate, and the wireless access network node maps the 5G service quality stream with longer average value calculation window length and/or larger maximum data burst capacity to other existing data radio bearers or new data radio bearers according to the maximum data burst capacity and average value calculation window length in the 5G service quality characteristic;
Preferably, the radio access network node may further evaluate the allocation and retention priority in the 5G quality of service parameter, and further determine a data radio bearer for accommodating the 5G quality of service flow separated from the original data radio bearer.
After determining that the 5G qos flow needs to be adjusted in relation to the existing mapping relation of the data radio bearer, the radio access network node determines the data radio bearer to be mapped for the 5G qos flow, where the 5G qos characteristics and/or the 5G qos parameters according to the mapping are consistent with the 5G qos characteristics and/or the 5G qos parameters according to which the 5G qos flow needs to be adjusted is screened, and the method can be seen in embodiments one to three.
After determining the final mapping relation between the 5G qos flows and the data radio bearers, the radio access network node maps the 5G qos flows onto other existing data radio bearers by 5G qos flow remapping (5G QoS Flow Remapping) or establishes new data radio bearers for accommodating the 5G qos flows.
And the wireless access network node maps each 5G service quality stream to a corresponding data wireless bearing according to the determined mapping relation between the 5G service quality stream and the data wireless bearing, and further sends and receives user plane data on the 5G service quality stream on the corresponding data wireless network bearing.
Claims (8)
1. A method for mapping a 5G quality of service flow to a data radio bearer, comprising the steps of:
(10) And 5G quality of service stream information transmission: the core network control plane node uses control plane interface signaling to send all 5G service quality stream information to be established and/or changed 5G service quality stream information to the wireless access network node, wherein the 5G service quality stream information comprises a service quality stream identifier, a 5G service quality parameter and a 5G service quality characteristic;
(20) 5G quality of service flow class determination: the wireless access network node determines a 5G service quality stream category according to the 5G service quality parameter and the 5G service quality characteristic and a configured transmission layer resource mapping strategy thereof;
the 5G service quality parameter comprises a 5G service quality identifier and an allocation and maintenance priority;
the 5G service quality characteristics comprise a data packet delay budget, a data packet error rate, a resource type, an average value calculation window and a maximum data burst capacity corresponding to the 5G service quality identifier;
the transmission layer resource mapping strategy comprises a mapping relation between a 5G service quality identifier and a transmission layer differential service code point and a mapping relation between the 5G service quality identifier and a virtual local area network priority;
The 5G quality of service stream class comprises 5G quality of service streams which can be mapped to the same data radio bearer and 5G quality of service streams which can only be mapped to the data radio bearer separately;
(30) And determining the mapping relation between the 5G service quality flow and the data radio bearer: the wireless access network node determines the data wireless bearing for accommodating each 5G service quality flow according to the corresponding relation between the 5G service quality configuration identifier and the data wireless bearing configuration parameter aiming at the 5G service quality flow in each category;
(40) Mapping of 5G quality of service flows to data radio bearers: the wireless access network node maps the 5G service quality stream to be built on the existing data radio bearer or the newly built data radio bearer according to the mapping relation between each 5G service quality stream and the data radio bearer, and simultaneously maps the built 5G service quality stream on other existing or newly built data radio bearers;
(50) User plane data transmission: the wireless access network node sends and receives user plane data on the 5G service quality stream on a corresponding data wireless network bearer according to the mapping relation between the 5G service quality stream and the data wireless bearer;
the step of determining the class of the 5G service quality stream specifically comprises the following steps:
The wireless access network node analyzes all 5G service quality characteristics of the 5G service quality flows to be established, established and modified in the protocol data unit session to which the 5G service quality flows to be established and modified belong, and classifies the 5G service quality flows with the same data packet delay budget and data packet error rate into the same category, or classifies the 5G service quality flows with the same data packet delay budget and data packet error rate into the same category; or the wireless access network node analyzes all 5G service quality characteristics of the 5G service quality flows to be established, established and modified in the protocol data unit session to which the 5G service quality flows to be established and modified belong, and classifies the 5G service quality flows with the same resource type, the same data packet delay budget and the data packet error rate into the same category, or classifies the 5G service quality flows with the same resource type, the same order of magnitude of data packet delay budget and the data packet error rate into the same category;
the step of determining (30) the mapping relation of the 5G service quality stream comprises the following steps:
(31) Configuration parameter correspondence is obtained: the wireless access network node obtains the corresponding relation between the configured 5G service quality identifier and the data wireless bearing configuration parameter;
(32) Determination of a mapping relationship between a 5G quality of service flow and a data radio bearer with a standard or predefined 5G quality of service identity: the wireless access network node determines a data wireless bearing accommodating a specific 5G service quality flow according to the category of the 5G service quality flow and the 5G service quality identifier and according to the corresponding relation between the 5G service quality identifier and the data wireless bearing configuration parameter, namely, determines the mapping relation between the 5G service quality flow and the data wireless bearing;
(33) Determination of 5G quality of service flow with dynamic 5G quality of service identification and data radio bearer mapping relation: the wireless access network node determines the mapping relation between the 5G service quality flow with dynamic 5G service quality identification and the data wireless bearing according to the category of the 5G service quality flow;
the step of determining (32) a mapping relationship between a 5G quality of service flow having a standard or predefined 5G quality identity and a data radio bearer comprises:
(321) The class of 5G quality of service flows is 5G quality of service flows that can only be mapped individually to data radio bearers: when the 5G service quality flow with the standard or the predefined 5G service quality identifier can only be mapped to the data radio bearer independently, the wireless access network node searches and acquires the data radio bearer configuration parameter in the corresponding relation between the 5G service quality identifier and the data radio bearer configuration parameter according to the 5G service quality identifier of the 5G service quality flow, establishes a new data radio bearer and further determines the mapping relation between the 5G service quality flow and the data radio bearer;
(322) The class of 5G quality of service flows is 5G quality of service flows that can be mapped to the same data radio bearer: when the 5G qos flow with the "standard or predefined 5G qos identifier" can be mapped to the same data radio bearer with other 5G qos flows, the radio access network node searches and obtains a data radio bearer configuration parameter in a correspondence between the 5G qos identifier and a data radio bearer configuration parameter based on the 5G qos identifier of the 5G qos flow, and if the configuration parameter is already used for an existing data radio bearer, the 5G qos flow will be mapped to the existing data radio bearer, otherwise, the 5G qos flow will be mapped to a newly established data radio bearer;
the step of determining the mapping relation of the dynamic quality identification (33) comprises the following steps:
(331) The class of 5G quality of service flows is 5G quality of service flows that can only be mapped individually to data radio bearers: when the 5G service quality flow with the dynamic 5G service quality identifier can only be mapped to a data radio bearer independently, the wireless access network node judges whether a protocol data unit session to which the 5G service quality flow belongs has a default data radio bearer, and when the protocol data unit session has the default data radio bearer, the 5G service quality flow is mapped to the default data radio bearer; otherwise, the wireless access network node refuses the request for establishing or modifying the 5G service quality flow;
(332) The class of 5G quality of service flows is 5G quality of service flows that can be mapped to the same data radio bearer: when the 5G qos flows with the "dynamic 5G qos identity" can be mapped to the same data radio bearer as other 5G qos flows, if at least one of the 5G qos flows is affiliated with an existing data radio bearer, the 5G qos flows with the "dynamic 5G qos identity" will be mapped to the existing data radio bearer, otherwise, if none of the 5G qos flows is affiliated with the existing data radio bearer, the same operation as the 5G qos flows that can only be mapped to the data radio bearer alone is adopted.
2. The method for mapping a 5G qos flow to a data radio bearer according to claim 1, wherein:
in the step of determining (20) the 5G qos class, the 5G qos class that can be mapped to the same data radio bearer includes at least two 5G qos flows, and some or all of the parameters in the 5G qos characteristics of the 5G qos flows are the same, and some or all of the parameters in the 5G qos parameters are the same; the 5G qos flow class that can only be mapped solely to the data radio bearer contains only one 5G qos flow.
3. The method for mapping a 5G qos flow to a data radio bearer according to claim 1, wherein:
the wireless access network node analyzes the 5G service quality characteristic of the 5G service quality flow to be modified, and uses a new 5G service quality characteristic parameter sent by the control plane node of the core network.
4. The method for mapping a 5G qos flow to a data radio bearer according to claim 1, wherein:
based on the 5G QoS flow category determining method, the wireless access network node evaluates the allocation and the retention priority in the 5G QoS parameters of the 5G QoS flows and classifies the 5G QoS flows with the same allocation and retention priority into the same category.
5. The method for mapping a 5G qos flow to a data radio bearer according to claim 1, wherein:
the resource types of the 5G quality of service flow include: a non-guaranteed bit rate type, a guaranteed bit rate type, and a delay-sensitive guaranteed bit rate type;
based on the 5G service quality stream category determining method, aiming at the 5G service quality stream with guaranteed bit rate type, the wireless access network node evaluates an average value calculation window in 5G service quality characteristics and classifies the 5G service quality streams with the same average value calculation window into the same category;
Based on the 5G quality of service stream category determining method, the wireless access network node evaluates the average value calculation window and the maximum data burst capacity in the 5G quality of service characteristic aiming at the time delay sensitive guaranteed bit rate type 5G quality of service stream, and classifies the 5G quality of service streams with the same average value calculation window and the same maximum data burst capacity into the same category.
6. The method for mapping a 5G qos flow to a data radio bearer according to claim 1, wherein:
based on the 5G service quality stream category determining method, the wireless access network node evaluates the mapping relation between the 5G service quality identification of the 5G service quality stream and the transmission layer differential service code point and the mapping relation between the 5G service quality identification and the virtual local area network priority, and classifies the 5G service quality streams with the same transmission layer differential service code point and virtual local area network priority into the same category.
7. The method for mapping a 5G qos flow to a data radio bearer according to claim 1, wherein:
based on the 5G QoS flow category determining method, the wireless access network node evaluates the wireless resource state, determines the 5G QoS flow category according to different parameters in the 5G QoS characteristics in different wireless resource states, and adjusts the 5G QoS characteristic parameters according to the changed wireless resource state, thereby adjusting the category of the existing 5G QoS flow.
8. The 5G quality of service flow and data radio bearer mapping method of claim 7, wherein:
the radio resource state comprises the radio resource state of the radio network node and/or the radio resource state of a cell managed by the radio network node;
the radio access network node evaluates the radio resource status based on the number of physical resource blocks available or currently in use, the number of user equipments that can be accommodated or currently accommodated, and the number of radio bearers that can be accommodated or currently accommodated.
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