CN110831076A - PDU session processing method and device - Google Patents

PDU session processing method and device Download PDF

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Publication number
CN110831076A
CN110831076A CN201810912183.2A CN201810912183A CN110831076A CN 110831076 A CN110831076 A CN 110831076A CN 201810912183 A CN201810912183 A CN 201810912183A CN 110831076 A CN110831076 A CN 110831076A
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access network
network node
pdu session
qos requirement
default
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CN110831076B (en
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郭雅莉
王胡成
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Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Abstract

The invention relates to the technical field of wireless communication, in particular to a PDU session processing method and a device, which are used for solving the problem that no clear solution exists in the prior art for managing the PDU session of which the default QoS flow is of a GBR type. An SMF entity of the embodiment of the invention determines the guaranteed bit rate information corresponding to the default QoS flow of the PDU session established for UE; the SMF entity sends a first QoS requirement containing the information of the guaranteed bit rate to a first access network node, and indicates that the first QoS requirement corresponds to a default QoS flow, so that the first access network node establishes a PDU session after determining that air interface resources can meet the first QoS requirement. The embodiment of the invention can avoid the network exception processing caused by refusing the establishment of the default QoS flow but accepting the establishment of other QoS flows due to insufficient resources, improve the reliability of the network and reduce the signaling processing burden of the network.

Description

PDU session processing method and device
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for processing a PDU session.
Background
A Packet Data Unit (PDU) session is a session between a terminal and a Data Network (DN) to provide a PDU connectivity service. The PDU connectivity service refers to a service that provides PDU exchange between a terminal and a DN determined by a Data Network Name (DNN).
In a next generation (NextGen) network, User Equipment (UE) performs data transmission via PDU (packet data unit) sessions, and multiple PDU sessions can be established after each UE attaches to the network. A plurality of data flows with different Quality of Service (QoS) requirements, called QoS flows, may be transmitted in each PDU session. When each PDU session is established, the network side needs to establish a default QoS flow for the PDU session, and the default QoS flow must exist all the time in the life cycle of the PDU session, so as to ensure the basic data connectivity of the PDU session. The QoS flow is divided into two types of Guaranteed Bit Rate (GBR) and non-Guaranteed Bit Rate (non-GBR), for the QoS flow of GBR type, the access network node can allocate enough air interface resources to guarantee the data transmission of the Guaranteed Bit Rate set for one QoS flow, and if the air interface resources are insufficient, the Guaranteed Bit Rate of the Qos flow of GBR type can not be Guaranteed, the QoS flow can be released.
At present, the default QoS flow of the PDU session is of a non-GBR type, and because the guaranteed code rate is not set for the QoS flow of the non-GBR type, resources do not need to be reserved for the default QoS flow to guarantee data transmission, the PDU session cannot be established due to insufficient resources and the default QoS flow is released. However, when the default QoS flow of a PDU session is of GBR type, there is no clear solution for how to manage the PDU session in which the default QoS flow is of GBR type.
Disclosure of Invention
The invention provides a PDU session processing method and a device, which are used for solving the problem that no clear solution exists in the prior art for managing the PDU session of which the default QoS flow is of a GBR type.
Based on the foregoing problem, in a first aspect, an embodiment of the present invention provides a method for processing a PDU session, where the method includes:
the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow of the PDU session established for the UE;
and the SMF entity sends a first QoS requirement containing the guaranteed bit rate information to a first access network node currently accessed by the UE, and indicates that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the determining, by the SMF entity, guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for the UE includes:
the SMF entity determines the guaranteed code rate information corresponding to the default QoS flow according to the guaranteed code rate information included in at least one PCC rule corresponding to the default QoS flow; or
And the SMF entity receives the default guaranteed bit rate information notified by the PCF entity and takes the default guaranteed bit rate information as the guaranteed bit rate information corresponding to the default QoS flow.
Optionally, after the SMF entity sends the first QoS requirement including the guaranteed bit rate information to the first access network node currently accessed by the UE, the method further includes:
the SMF entity receives a first response message which is sent by the first access network node and represents that the PDU session is successfully established; wherein the first response message is sent by the first access network node after determining that the air interface resource can meet the first QoS requirement corresponding to the default QoS flow.
Optionally, after the SMF entity sends the first QoS requirement including the guaranteed bit rate information to the first access network node currently accessed by the UE, the method further includes:
the SMF entity receives a second response message which is sent by the first access network node and represents that the PDU session is failed to be established, and deletes the PDU session; and sending, by the first access network node, the second response message after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the method further includes:
and the SMF entity sends a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE, so that the first access network node allocates resources for the default QoS flow according to the second QoS requirement when determining that air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, and establishes the PDU session.
Optionally, after the SMF entity receives a first response message indicating that the PDU session establishment is successful, where the first response message is sent by the first access network node, the method further includes:
after the SMF entity receives a first indication message which is sent by the first access network node and represents that the PDU session is deleted, the PDU session is deleted; the first indication message is sent after the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, after the SMF entity receives a first response message indicating that the PDU session establishment is successful, where the first response message is sent by the first access network node, the method further includes:
after receiving a second indication message which is sent by the first access network node and indicates that a default QoS flow is updated, the SMF entity updates the stored context information according to the second QoS requirement contained in the second indication message; and the second indication message is sent after the first access network node allocates resources to the default QoS flow according to the second QoS requirement after determining that the changed air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the method further includes:
the SMF entity determines a default bearer in a target mobile communication system corresponding to the default QoS flow and determines a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; wherein the target mobile communication system is different from a mobile communication system currently accessed by the UE;
the SMF entity sending the third QoS requirement to the first access network node; and the first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is handed over to the base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources to the default bearer according to the third QoS requirement.
In a second aspect, an embodiment of the present invention further provides a method for processing a PDU session, where the method includes:
a first access network node receives a first QoS requirement which is sent by an SMF entity and contains code rate guarantee information, and the first QoS requirement corresponds to an indication of a default QoS flow of a PDU session which is established for UE by the SMF entity; the first access network node is an access network node currently accessed by the UE;
and the first access network node establishes the PDU session after determining that the air interface resource can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, after the first access network node establishes the PDU session after determining that the air interface resource can meet the first QoS requirement, the method further includes:
and the first access network node sends a first response message indicating that the PDU session is successfully established to the SMF entity.
Optionally, the method further includes:
and after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node sends a second response message indicating that the PDU session establishment fails to the SMF entity, so that the SMF entity deletes the PDU session after receiving the second response message.
Optionally, the method further includes:
the first access network node receives a second QoS requirement which is sent by the SMF entity and contains a 5QI of a non-GBR type;
and when determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node allocates resources for the default QoS flow according to the second QoS requirement, and establishes the PDU session.
Optionally, after the first response message indicating that the PDU session establishment is successful, the method further includes, after the first response message is sent by the first access network node to the SMF entity:
the first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
and the first access network node deletes the PDU session and sends a first indication message for indicating the deletion of the PDU session to the SMF entity.
Optionally, after the first response message indicating that the PDU session establishment is successful, the method further includes, after the first response message is sent by the first access network node to the SMF entity:
the first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
the first access network node allocating resources to the default QoS flow according to the second QoS requirement;
the first access network node sends a second indication message to the SMF entity indicating that a default QoS flow is updated.
Optionally, after the first response message indicating that the PDU session establishment is successful, the method further includes, after the first response message is sent by the first access network node to the SMF entity:
after determining that the PDU session established for the UE needs to be switched to a second access network node, the first access network node notifies the second access network node of QoS flow information of the PDU session, where the QoS flow information includes the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow, so that the second access network node allows switching of the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, after the first access network node notifies the second access network node of the QoS flow information of the PDU session, the method further includes:
the first access network node receives a third indication message which is sent by a second access network node and indicates that the PDU session is allowed to be switched, and the PDU session is switched; and the third indication message is sent after the second access network node determines that the PDU session is allowed to be switched according to the fact that air interface resources can meet the first QoS requirement.
Optionally, after the first access network node notifies the second access network node of the QoS flow information of the PDU session, the method further includes:
the first access network node receives a fourth indication message which is sent by a second access network node and indicates that the PDU session is not allowed to be switched, and determines that the PDU session cannot be switched; and the fourth indication message is sent by the second access network node after determining that the PDU session is not allowed to be switched according to that air interface resources cannot meet the first QoS requirement.
Optionally, before the first response message indicating that the PDU session establishment is successful, the method further includes:
the first access network node receives a third QoS requirement which is corresponding to a default bearer and contains 5QI of a non-GBR type, wherein the third QoS requirement is sent by the SMF entity; the default bearer is a bearer in a target mobile communication system corresponding to the default QoS flow, and the target mobile communication system is different from a mobile communication system currently accessed by the UE;
after the first response message indicating that the PDU session establishment is successful, sent by the first access network node to the SMF entity, the method further includes:
the first access network node determines that the UE is switched to a base station in the target mobile communication system;
and the first access network node sends the third QoS requirement to a base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
In a third aspect, an embodiment of the present invention further provides a method for processing a PDU session, where the method includes:
a second access network node receives QoS flow information of a PDU session sent by a first access network node which is currently accessed by UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second access network node allows the PDU session to be switched after determining that the air interface resource can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, after the second access network node determines that the air interface resource can meet the first QoS requirement, and then allows to switch the PDU session, the method further includes:
and the second access network node sends a third indication message indicating that the PDU session is allowed to be switched to the first access network node, so that the first access network node switches the PDU session after receiving the third indication message.
Optionally, the method further includes:
and after determining that the air interface resource cannot meet the first QoS requirement, the second access network node sends a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node, so that the first access network node determines that the PDU session cannot be switched after receiving the fourth indication message.
Optionally, the QoS flow information further includes a second QoS requirement containing a 5QI of non-GBR type corresponding to the default QoS flow, and the method further includes:
and after determining that the air interface resources cannot meet the first QoS requirement, the second access network node allocates resources for the default QoS flow according to the second QoS requirement and allows switching of the PDU session.
In a fourth aspect, an embodiment of the present invention provides a session management function SMF entity, including: a processor, a memory;
the processor is used for reading the program in the memory and executing:
determining guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for UE;
and sending a first QoS requirement containing the information of the guaranteed bit rate to a first access network node currently accessed by the UE, and indicating that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that air interface resources can meet the first QoS requirement.
In a fifth aspect, an embodiment of the present invention provides a first access network node, including: a processor, a memory;
the processor is used for reading the program in the memory and executing:
receiving a first QoS requirement which is sent by an SMF entity and contains information of guaranteed code rate, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for UE; the first access network node is an access network node currently accessed by the UE;
and after determining that the air interface resource can meet the first QoS requirement, establishing the PDU session.
In a sixth aspect, an embodiment of the present invention provides a second access network node, including: a processor, a memory;
the processor is used for reading the program in the memory and executing:
a second access network node receives QoS flow information of a PDU session sent by a first access network node which is currently accessed by UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second access network node allows the PDU session to be switched after determining that the air interface resource can meet the first QoS requirement.
In a seventh aspect, an embodiment of the present invention provides a second session management function SMF entity, including:
the device comprises a determining module, a sending module and a receiving module, wherein the determining module is used for determining the guaranteed bit rate information corresponding to the default QoS flow of the PDU session established for the UE;
a sending module, configured to send a first QoS requirement that includes the guaranteed bit rate information to a first access network node to which the UE currently accesses, and indicate that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that an air interface resource can meet the first QoS requirement.
In an eighth aspect, an embodiment of the present invention provides a second first access network node, including:
a first receiving module, configured to receive a first QoS requirement that includes guaranteed bit rate information and is sent by an SMF entity, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for a UE; the first access network node is an access network node currently accessed by the UE;
and the first processing module is configured to establish the PDU session after determining that the air interface resource can meet the first QoS requirement.
In a ninth aspect, an embodiment of the present invention provides a second access network node, including:
the second receiving module is used for receiving the QoS flow information of the PDU session sent by the first access network node which is currently accessed by the UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second processing module is used for allowing the PDU session to be switched after the air interface resource is determined to meet the first QoS requirement.
In a tenth aspect, embodiments of the present invention provide a computer-readable medium on which a computer program is stored, the program, when executed by a processor, implementing the steps of the method according to any one of the first aspect, the steps of the method according to any one of the second aspect, or the steps of the method according to any one of the third aspect.
Because the default QoS flow of the PDU session established for the UE is of a GBR type; the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow of the PDU session established for the UE; sending a first QoS requirement containing the guaranteed bit rate information to a first access network node, so that the first access network node judges whether the PDU session can be established according to the received first QoS requirement; establishing a PDU session after a first access network node determines that air interface resources can meet a first QoS requirement; therefore, the abnormal conditions of network exception handling and more signaling interaction handling caused by the fact that the establishment of default QoS flows is refused but the establishment of other QoS flows is admitted due to insufficient air interface resources can be avoided; the reliability risk of the network is improved, the signaling processing burden of the network is reduced, and the system performance is further improved.
Drawings
FIG. 1 is a diagram of a system architecture according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a PDU session processing system according to an embodiment of the present invention;
fig. 3 is a flowchart of a PDU session processing according to a first embodiment of the present invention;
fig. 4 is a flowchart illustrating a PDU session processing procedure according to a second embodiment of the present invention;
FIG. 5 is a flow chart of a third PDU session process according to the embodiment of the present invention;
FIG. 6 is a flowchart illustrating a fourth PDU session process according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a fifth PDU session processing procedure according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a sixth PDU session processing procedure according to an embodiment of the present invention;
fig. 9 is a flowchart of a seventh PDU session processing according to the embodiment of the present invention;
fig. 10 is a flowchart illustrating an eighth PDU session processing procedure according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a first SMF entity according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a first access network node according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a first second access network node according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a second SMF entity according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of a second first access network node according to an embodiment of the present invention;
fig. 16 is a schematic structural diagram of a second access network node according to the embodiment of the present invention;
fig. 17 is a flowchart of a PDU session processing method according to a first embodiment of the present invention;
fig. 18 is a flowchart of a PDU session processing method according to a second embodiment of the present invention;
fig. 19 is a flowchart of a processing method for a PDU session according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention will be described in further detail below with reference to the accompanying drawings.
Fig. 1 illustrates a schematic diagram of a system architecture suitable for an embodiment of the present invention, as shown in fig. 1, in a future 5G system architecture, a terminal 101 may communicate with a core network via an access network entity 102, and the terminal may refer to a UE, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent or a user equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G network, etc. For convenience of description, fig. 1 only illustrates 1 terminal, and in an actual network, multiple terminals may coexist, which is not described herein again.
AN Access Network (AN) entity 102, which may also be referred to as a Radio Access Network (R) entity, hereinafter referred to as AN Access Network entity (R) AN entity, is mainly responsible for providing a wireless connection for the terminal 101, and ensuring reliable transmission of uplink and downlink data of the terminal 101. The Access network entity 102 may be a gbb (generation Node B) in a 5G System, a Base Transceiver Station (BTS) in a Global System for mobile communications (GSM) System or a Code Division Multiple Access (CDMA) System, a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, an evolved Node B (eNB, eNodeB) in a Long Term Evolution (LTE) System, or the like.
A Session Management Function (SMF) Entity 103, which may be configured to perform a part of functions of a Mobility Management Entity (MME) in the LTE system, and is mainly responsible for establishing a Session, managing the Session, and the like for the terminal 101. A suitable User Plane Function (UPF) entity may be selected for the terminal 101 according to the location information of the terminal 101.
The user plane functional entity 104 is a functional network element of the user plane of the terminal 101, and has main functions including packet routing and forwarding, Quality of Service (QoS) processing of user plane data, and the like.
An Access and Mobility Management (AMF) entity 105 has the main functions of a termination point of a radio Access network control plane, a termination point of a non-Access signaling, Mobility Management, lawful interception, Access authorization or authentication, and the like.
A Policy Control Function (PCF) entity 106 is mainly responsible for the functions of establishing, releasing, and changing the transmission path of the user plane.
An Authentication Server Function (AUSF) entity 107, whose main functions include user Authentication and the like.
A User Data Management (UDM) entity 108 is mainly responsible for managing the subscription Data of the User, and the like.
The Data Network (DN) 109 may refer to a Network providing services for the terminal 101, for example, some DNs may provide an internet function for the terminal 101, and some DNs may provide a multimedia message function for the terminal 101.
Also shown in fig. 1 are possible implementations of interfaces in various entities, such as an N2 interface between the access network entity 102 and the AMF entity 109, an N9 interface between the access network entity 102 and the UPF entity 104, and so on, which are not described in detail herein.
It should be noted that the above system architecture is only an example of the system architecture applicable to the embodiment of the present invention, and the system architecture applicable to the embodiment of the present invention may also add other entities or reduce part of the entities compared to the system architecture shown in fig. 1.
A PDU session is a connection between a terminal and a DN, providing a PDU connectivity service. The terminal may establish multiple PDU sessions to connect to the same DN or different DNs. The terminal may also establish PDU sessions served by different UPFs to connect to the same DN.
The PDU session establishment procedure is generally divided into three parts: a first part, a preparation process of user plane resources of PDU session; a second part, establishing the air interface resource of PDU conversation; and a third part, namely, the subsequent flow of the PDU session, for example, after the PDU session is established, the (R) AN entity sends the port number of the (R) AN entity to the UPF entity, so as to complete the confirmation of the established PDU session.
And aiming at the second part in the PDU session establishment process, respectively establishing air interface resources for each QoS flow in the PDU session according to the QoS requirement corresponding to each QoS flow in the PDU session. At least one QoS flow is included in one PDU session, wherein one QoS flow is a default QoS flow. A default QoS flow refers to a flow that is processed by default QoS rules. If the establishment of the air interface resource of the default QoS flow of the PDU session fails, the establishment of the PDU session is marked to fail. If the establishment of the air interface resources of the default QoS flow of the PDU session is successful, even if the establishment of the air interface resources of other QoS flows included in the PDU session fails, the PDU session may be considered to be successfully established.
In conjunction with the foregoing description, as shown in fig. 2, a PDU session processing system provided in an embodiment of the present invention includes: UE 20, first access network node 21, AMF entity 22, SMF entity 23;
the first access network node 21 is an access network node to which the UE 20 is currently accessed;
the SMF entity 23 is configured to determine guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for the UE; sending a first QoS requirement containing the guaranteed bit rate information to a first access network node currently accessed by the UE, and indicating that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that air interface resources can meet the first QoS requirement;
a first access network node 21, configured to receive a first QoS requirement that includes information on a guaranteed bit rate and is sent by an SMF entity, and the first QoS requirement corresponds to an indication of a default QoS flow of a PDU session established by the SMF entity for a UE; the first access network node is an access network node currently accessed by the UE; after determining that the air interface resource can meet the first QoS requirement, establishing the PDU session;
the AMF entity 22 is configured to transparently transmit data to be transmitted between the SMF entity 23 and the first access network node 21.
In the initial establishment process of the PDU session, the default QoS flow of the PDU session is of a GBR (Guaranteed bit rate) type;
the SMF entity determines the guarantee code rate information corresponding to the default QoS flow of the PDU session by requesting a QoS decision from the PCF entity and determining the guarantee code rate information corresponding to the default QoS flow according to the QoS decision returned by the PCF entity; or the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow according to the local strategy or the subscription information of the UE. The following description will be made separately.
Optionally, the SMF entity determines, according to the following manner, guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for the UE:
in the method 1, an SMF entity determines guaranteed bit rate information corresponding to the default QoS flow according to guaranteed bit rate information included in at least one Policy and Charging Control (PCC) rule corresponding to the default QoS flow.
Specifically, a PCF entity sends a plurality of PCC rules to an SMF entity, and the SMF entity determines at least one PCC rule corresponding to a default QoS flow from the plurality of PCC rules; each PCC rule includes a guaranteed code rate.
When the guaranteed code rate information corresponding to the default QoS flow is determined, adding the guaranteed code rates contained in each PCC rule in at least one PCC rule corresponding to the default QoS flow to obtain the guaranteed code rate information corresponding to the default QoS flow;
for example, PCC rules corresponding to default QoS flows include: PCC rule 1, PCC rule 2, PCC rule 3; wherein, the guaranteed code rate contained in the PCC rule 1 is 1M, the guaranteed code rate contained in the PCC rule 2 is 2M, and the guaranteed code rate contained in the PCC rule 3 is 3M; then the information of the guaranteed code rate corresponding to the default QoS flow is: 1M +2M +3M ═ 6M.
In mode 2, the SMF entity receives the default guaranteed bit rate information notified by the PCF entity, and uses the default guaranteed bit rate information as the guaranteed bit rate information corresponding to the default QoS stream.
Specifically, the PCF entity carries default guaranteed bit rate information in the QoS decision, which is determined by the PCF entity to be directly sent to the SMF entity through the QoS decision;
correspondingly, after receiving the QoS decision sent by the PCF entity, the SMF entity obtains default guaranteed bit rate information from the QoS decision, and takes the default guaranteed bit rate information as guaranteed bit rate information corresponding to the default QoS stream.
Mode 3, the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow according to the local strategy or the subscription information of the UE;
it should be noted that, in the mode 3, the mode that the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow is a mode in the prior art, and details are not described here.
In the process of establishing the PDU session, a first access network node is required to distribute air interface resources for the PDU session; specifically, the first access network node allocates air interface resources for each QoS flow of the PDU session according to the QoS requirement of each QoS flow sent by the SMF entity;
wherein, the QoS requirement of the default QoS flow is called as a first QoS requirement;
when the SMF entity sends the first QoS requirement to the first access network node, it further needs to indicate that the first QoS requirement corresponds to the default QoS flow, so that the first access network node allocates resources for the default QoS flow according to the first QoS requirement.
The first QoS requirement includes, but is not limited to:
guaranteed code rate information, 5QI (5G QoS Indicator, 5G QoS indication) of GBR type.
It should be noted that, when the SMF entity sends the first QoS requirement to the first access network node, it also sends other QoS flows that need to be established in the PDU session and the corresponding QoS requirements to the first access network node;
an alternative embodiment is: the SMF entity sends one or more QoS flows needing to be established in the PDU session and the QoS requirement of each QoS flow to a first access network node, the SMF entity indicates one QoS flow as a default QoS flow, and the first QoS requirement corresponding to the default QoS flow comprises guaranteed code rate information and 5QI of a GBR type.
When the first access network node allocates resources for the default QoS flow according to the first QoS requirement, the default QoS flow is of a GBR type; the first access network node needs to judge whether the air interface resource can meet the first QoS requirement corresponding to the default QoS flow, so as to judge whether the PDU session can be successfully established;
and when the first access network node determines that the air interface resources can meet the first QoS requirement corresponding to the default QoS flow, continuing to allocate resources for other QoS flows in the PDU session.
The following is a description based on different results.
1. And when determining that the air interface resource can meet a first QoS requirement corresponding to the default QoS flow, the first access network node determines to establish the PDU session.
And after determining that the air interface resources can meet the first QoS requirement and establishing the PDU session, the first access network node sends a first response message indicating that the PDU session is successfully established to the SMF entity.
As shown in fig. 3, a first PDU session processing flow chart provided in the embodiment of the present invention is provided.
Step 301, during the initial establishment of PDU session, the SMF entity requests a QoS decision from the PCF entity.
Step 302, the PCF entity returns a QoS decision to the SMF entity.
Step 303, the SMF entity determines that a PDU session needs to be established, and determines one or more QoS flows included in the PDU session and the QoS requirement of each QoS flow;
in step 303, the SMF entity determines a default QoS flow of the PDU session, and the guaranteed bit rate information and the 5QI of the GBR type corresponding to the default QoS flow.
Step 304, the SMF entity sends the PDU session establishment request to the first access network node through the AMF entity, and the AMF entity transparently transmits the request of the SMF entity; the method comprises the steps of including one or more QoS flows needing to be established in the PDU session and the QoS requirement of each QoS flow, indicating one QoS flow as a default QoS flow and indicating a first QoS requirement corresponding to the default QoS flow; the first QoS requirement includes guaranteed rate information and 5QI of GBR type.
Step 305, the first access network node performs air interface resource configuration according to the QoS requirement of each QoS flow in the received PDU session establishment requirement.
Step 306, after the first access network node determines that the air interface resource can meet the first QoS requirement, a first response message indicating that the PDU session is successfully established is sent to the SMF entity through the AMF entity.
2. When determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the embodiment of the present invention provides two optional implementation manners.
The first mode is as follows:
after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node sends a second response message indicating that the PDU session establishment fails to an SMF entity;
correspondingly, after receiving a second response message which is sent by the first access network node and indicates that the PDU session is failed to be established, the SMF entity deletes the PDU session.
It should be noted that, after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node does not allocate resources to other QoS flows in the PDU session.
As shown in fig. 4, a second PDU session processing flow chart provided in the embodiment of the present invention is provided.
Step 401, during the initial establishment process of PDU session, the SMF entity requests the PCF entity for QoS decision.
Step 402, the PCF entity returns a QoS decision to the SMF entity.
Step 403, the SMF entity determines that a PDU session needs to be established, and determines one or more QoS flows included in the PDU session and the QoS requirement of each QoS flow;
in step 403, the SMF entity determines a default QoS flow of the PDU session, and the guaranteed bit rate information and the 5QI of the GBR type corresponding to the default QoS flow.
Step 404, the SMF entity sends the PDU session establishment request to the first access network node through the AMF entity, and the AMF entity transparently transmits the request of the SMF entity; the method comprises the steps of including one or more QoS flows needing to be established in the PDU session and the QoS requirement of each QoS flow, indicating one QoS flow as a default QoS flow and indicating a first QoS requirement corresponding to the default QoS flow; the first QoS requirement includes guaranteed rate information and 5QI of GBR type.
Step 405, the first access network node performs air interface resource allocation according to the QoS requirement of each QoS flow in the received PDU session establishment requirement.
Step 406, after the first access network node determines that the air interface resource cannot meet the first QoS requirement, a second response message indicating that the PDU session establishment fails is sent to the SMF entity through the AMF entity.
Step 407, the SMF entity deletes the PDU session.
The second mode is as follows:
the SMF entity sends a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE;
and after determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node allocates resources for the default QoS flow according to the second QoS requirement, and establishes the PDU session.
It should be noted that, in an alternative manner, when the SMF entity sends the first QoS requirement to the first access network node and indicates that the first QoS requirement corresponds to the default QoS flow, the SMF entity sends a second QoS requirement containing 5QI of non-GBR type to the first access network node and indicates that the second QoS requirement corresponds to the default QoS flow;
that is to say, the SMF entity in the embodiment of the present invention sends two types of QoS requirements corresponding to a default QoS flow to the first access node, where the two types of QoS requirements are a first QoS requirement containing guaranteed code rate information and a second QoS requirement containing a 5QI of non-GBR type; and the second QoS requirement does not contain the information of the guaranteed code rate, and the default QoS flow established by the second QoS requirement is a non-GBR type QoS flow.
In the embodiment of the invention, when the first access network node determines that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node establishes the default QoS flow by using the alternative second QoS requirement, and normally allocates resources for other QoS flows in the PDU session.
After the first access network node establishes the default QoS flow by using the second QoS requirement, a response message of PDU session establishment success is fed back to the SMF entity through the AMF entity, and the QoS flow which is established successfully and/or fails is fed back to the SMF entity.
In the embodiment of the invention, the access network node allocates resources for the default QoS flow of the PDU session according to the first QoS requirement, and after the PDU session is successfully established, different processing operations need to be carried out on the PDU session when the air interface resources change or the access network node accessed by UE changes. The following is a detailed description based on different scenarios.
In case one, the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
When the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the embodiment of the present invention provides two optional ways to process the established PDU session:
the first mode is as follows:
the first access network node deletes the PDU session and sends a first indication message for indicating the deletion of the PDU session to the SMF entity;
correspondingly, after receiving the first indication message which is sent by the first access network node and indicates that the PDU session is deleted, the SMF entity deletes the PDU session.
Specifically, the first access network node sends the first indication message to the SMF entity through the AMF entity.
As shown in fig. 5, in the embodiment of the present invention, when the air interface resource after the change of the first access network node cannot meet the first QoS requirement corresponding to the default QoS flow, a flowchart for processing a PDU session is performed.
Step 501, a first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
step 502, the first access network node determines to delete the PDU session and all QoS flows in the PDU session;
step 503, the first access network node sends a first indication message indicating that the PDU session is deleted to the SMF entity through the AMF entity;
and step 504, after receiving the first indication message, the SMF entity deletes the PDU session.
The second mode is as follows:
the first access network node allocates resources for the default QoS flow according to the second QoS requirement; and sending a second indication message indicating that the default QoS flow is updated to the SMF entity;
correspondingly, after receiving a second indication message which is sent by the first access network node and indicates that the default QoS flow is updated, the SMF entity updates the stored context information according to the second QoS requirement included in the second indication message.
Specifically, the first access network node sends the second indication message to the SMF entity through the AMF entity.
It should be noted that, when the condition for processing the PDU session in the second manner is adopted, the SMF entity sends the second QoS requirement corresponding to the default QoS flow of the PDU session to the first access network node at the initial stage of establishing the PDU session; wherein the second QoS requirement is a 5QI QoS requirement comprising a non-GBR type.
That is to say, the first access network node stores the second QoS requirement (alternative QoS requirement) containing the 5QI of the non-GBR type corresponding to the default QoS flow of the PDU session, and after the first access network node determines that the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the second QoS requirement is used to reallocate resources to the default QoS flow.
After receiving the second indication message, the SMF entity replaces the first QoS requirement in the stored context information with a second QoS requirement; i.e., indicating that the default QoS flow is established according to the second QoS requirements.
As shown in fig. 6, in the embodiment of the present invention, when the air interface resource after the change of the first access network node cannot meet the first QoS requirement corresponding to the default QoS flow, a flowchart for processing a PDU session is performed.
601, the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet a first QoS requirement corresponding to the default QoS flow;
step 602, the first access network node allocates resources for the default QoS flow according to the stored second QoS requirement;
step 603, the first access network node sends a second indication message indicating that the default QoS flow is updated to the SMF entity through the AMF entity;
step 604, after receiving the second indication message, the SMF entity updates the stored context information according to the second QoS requirement included in the second indication message.
In case two, the UE moves and needs to be handed over from the source access node to the target access node.
In case two, the access network node to which the UE currently accesses is the first access network node, and the target access node to which the UE needs to be switched is the second access network node.
If the UE moves, the first access network node determines that the UE needs to be switched to a second access network node;
after determining that a PDU session established for UE is switched to a second access network node, a first access network node informs the second access network node of QoS flow information of the PDU session;
correspondingly, the second access network node receives the QoS flow information of the PDU session sent by the first access network node;
the QoS flow information includes, but is not limited to, the following information:
the first QoS requirement, the first QoS requirement corresponding to an indication of a default QoS flow.
After receiving the QoS flow information, the second access network node judges whether air interface resources can meet the first QoS requirement, and therefore whether PDU conversation is allowed to be switched is determined;
the following first describes a manner in which the second access network node processes the PDU session after determining that the air interface resource can meet the first QoS requirement:
specifically, after the second access network node determines that the air interface resource can meet the first QoS requirement, switching the PDU session is allowed.
After determining that the PDU session is allowed to be switched, the second access network node sends a third indication message indicating that the PDU session is allowed to be switched to the first access network node;
correspondingly, the first access network node receives a third indication message which is sent by the second access network node and indicates that the PDU session is allowed to be switched, and the PDU session is switched.
As shown in fig. 7, the embodiment of the present invention is a flowchart for processing a PDU session when a UE needs to be handed over from a first access node to a second access node.
Step 701, a first access node determines that UE needs to be switched to a second access node, and the first access node sends a switching request to an AMF entity;
wherein, the switching request comprises QoS flow information of PDU conversation; the QoS flow information includes a first QoS requirement, an indication that the first QoS requirement corresponds to a default QoS flow, and QoS flow requirements of other QoS flows.
Step 702, the AMF entity sends the PDU session identification to be switched to the SMF entity.
Step 703, the SMF entity determines whether to allow the PDU session to be switched; and when the SMF entity determines to allow the PDU session switching, informing the AMF entity of allowing the PDU session switching.
Step 704, the AMF entity sends the PDU session identification to be switched and the QoS flow information of the PDU session to the second access node;
the QoS flow information includes a first QoS requirement, an indication that the first QoS requirement corresponds to a default QoS flow, and QoS flow requirements of other QoS flows.
Step 705, after the second access network node determines that the air interface resource can meet the first QoS requirement, a third indication message indicating that the PDU session is allowed to be switched is sent to the AMF entity.
Step 706, the AMF entity sends a third indication message indicating that the PDU session is allowed to be switched to the first access node.
Step 707, the AMF entity informs the SMF entity that the PDU session is allowed to be switched.
It should be noted that, the execution of step 706 and step 707 does not differ in sequence, and may also be executed simultaneously.
Step 708, the first access node switches the PDU session.
After the second access network node determines that the air interface resource cannot meet the first QoS requirement, the second access network node of the embodiment of the present invention provides two optional ways of processing the PDU session:
the first mode is as follows:
after determining that the air interface resource cannot meet the first QoS requirement, the second access network node sends a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node;
correspondingly, the first access network node receives a fourth indication message which is sent by the second access network node and indicates that the PDU session is not allowed to be switched, and determines that the PDU session cannot be switched.
As shown in fig. 8, the embodiment of the present invention is a flowchart for processing a PDU session when a UE needs to be handed over from a first access node to a second access node.
Step 1101, the first access node determines that the UE needs to be switched to the second access node, and the first access node sends a switching request to the AMF entity;
wherein, the switching request comprises QoS flow information of PDU conversation; the QoS flow information includes a first QoS requirement, an indication that the first QoS requirement corresponds to a default QoS flow, and QoS flow requirements of other QoS flows.
Step 1102, the AMF entity sends the PDU session identifier to be switched to the SMF entity.
Step 1103, the SMF entity determines whether to allow the PDU session to be switched; and when the SMF entity determines to allow the PDU session switching, informing the AMF entity of allowing the PDU session switching.
Step 1104, the AMF entity sends the PDU session identification to be switched and the QoS flow information of the PDU session to the second access node;
the QoS flow information includes a first QoS requirement, an indication that the first QoS requirement corresponds to a default QoS flow, and QoS flow requirements of other QoS flows.
Step 1105, after the second access network node determines that the air interface resource can not meet the first QoS requirement, a fourth indication message indicating that the PDU session is not allowed to be switched is sent to the AMF entity.
Step 1106, the AMF entity sends a fourth indication message indicating that the PDU session is not allowed to be switched to the first access node.
Step 1107, the AMF entity informs the SMF entity that the PDU session is not allowed to be switched.
It should be noted that, the execution of step 1106 and step 1107 do not differ in sequence, and may also be executed simultaneously.
Step 1108, the first access node determines not to switch the PDU session.
The second mode is as follows:
and after determining that the air interface resources cannot meet the first QoS requirement, the second access network node allocates resources for the default QoS flow according to the second QoS requirement and allows switching of the PDU session.
It should be noted that, when the condition for processing the PDU session in the second manner is adopted, the SMF entity sends the second QoS requirement corresponding to the default QoS flow of the PDU session to the first access network node at the initial stage of establishing the PDU session; wherein the second QoS requirement is a 5QI QoS requirement comprising a non-GBR type.
That is, the first access network node stores the second QoS requirement (candidate QoS requirement) containing the 5QI of non-GBR type corresponding to the default QoS flow of the PDU session, and when the first access network node transmits the QoS flow information of the PDU session to the second access network node, the QoS flow information further includes the second QoS requirement containing the 5QI of non-GBR type;
and after determining that the air interface resources cannot meet the first QoS requirement, the second access network node allocates resources for the default QoS flow according to a second QoS requirement in the received QoS flow information and allows switching of the PDU session.
As shown in fig. 9, the embodiment of the present invention is a flowchart for processing a PDU session when a UE needs to be handed over from a first access node to a second access node.
Step 901, the first access node determines that the UE needs to be switched to the second access node, and the first access node sends a switching request to the AMF entity;
wherein, the switching request comprises QoS flow information of PDU conversation; the QoS flow information includes a first QoS requirement, an indication that the first QoS requirement corresponds to a default QoS flow, a second QoS requirement comprising a 5QI of non-GBR type, an indication that the second QoS requirement corresponds to a default QoS flow, and QoS flow requirements of other QoS flows.
And step 902, the AMF entity sends the PDU session identification to be switched to the SMF entity.
Step 903, the SMF entity judges whether to allow the PDU session to be switched; and when the SMF entity determines to allow the PDU session switching, informing the AMF entity of allowing the PDU session switching.
Step 904, the AMF entity sends the PDU session identification to be switched and the QoS flow information of the PDU session to the second access node;
the QoS flow information includes a first QoS requirement, an indication that the first QoS requirement corresponds to a default QoS flow, a second QoS requirement including a 5QI of non-GBR type, an indication that the second QoS requirement corresponds to a default QoS flow, and QoS flow requirements of other QoS flows.
Step 905, after the second access network node determines that the air interface resource cannot meet the first QoS requirement, allocating resources for the default QoS flow according to the second QoS requirement in the received QoS flow information.
Step 906, the second access network node sends a fifth indication message to the AMF entity indicating that the PDU session is allowed to be switched.
Step 907, the AMF entity sends a fifth indication message to the first access node indicating that the handover of the PDU session is allowed.
Step 908, the AMF entity informs the SMF entity that the PDU session is allowed to be switched.
It should be noted that, the execution of step 907 and step 908 does not differ in sequence, and may also be executed simultaneously.
Step 909, the first access node switches the PDU session.
And in case III, the UE moves across systems and needs to be switched from the source mobile communication system to the target mobile communication system.
In case three, the source mobile communication system to which the UE is currently accessed is a 5G system, and the target mobile communication system to which the UE needs to be switched is a 4G system; and, the UE accesses the first access network node in the 5G system, and the UE accesses the base station in the 4G system.
Since the default QoS flow of the PDU session in the 5G system may be of GBR type, but the default QoS flow is not supported in the 4G system as GBR type; if the UE can move across the system, in the initial establishment process of the PDU session, the SMF sends the QoS requirements of a plurality of QoS flows in the PDU session to the first access network node, and the QoS flows of the PDU session are switched to the QoS requirements of corresponding bearers of the 4G system. Since the 4G system does not support the scenario where the default bearer is GBR, if the default QoS flow of the 5G system is of GBR type, the SMF needs to map the default QoS flow to the default bearer of the 4G system of a non-GBR type.
Optionally, the SMF entity determines a default bearer in the target mobile communication system corresponding to the default QoS flow, and determines a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; the SMF entity sends the third QoS requirement to the first access network node.
The first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is switched to the base station in the target mobile communication system; so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
Specifically, the first access network node in the 5G system and the base station in the 4G system cannot directly transmit data/signaling; when the first access network node sends the third QoS requirement to the base station in the target mobile communication system, the first access network node firstly sends the third QoS requirement to the AMF entity, the AMF entity sends the third QoS requirement to be sent to the MME in the 4G system, and the MME sends the third QoS requirement to the base station.
As shown in fig. 10, the embodiment of the present invention is a flowchart for processing a PDU session when a UE moves across systems.
Step 1001, when an initial PDU session of the 5G system is established by the UE, the SMF entity sends QoS requirements of a plurality of QoS flows in the PDU session to the first access network node through the AMF entity, and the QoS requirements of a corresponding bearer switched to the 4G system by the plurality of QoS flows;
the default QoS flow of the PDU conversation in the 5G system corresponds to a first QoS requirement, and the first QoS requirement comprises code rate guarantee information; the default bearer mapped by the default QoS flow after switching to the 4G system corresponds to a third QoS requirement comprising a 5QI of non-GBR type.
Step 1002, the first access network node determines that the UE needs to be handed over to a base station in the 4G system.
Step 1003, the first access network node sends a switching request to the AMF entity; the switching request comprises a PDU session identifier to be switched and a QoS requirement of a corresponding bearer after the switching request is switched to the 4G system; the default bearer is of non-GBR type.
Step 1004, the AMF entity sends the received PDU session identifier to be switched and the QoS requirement of the bearer to the MME.
Step 1005, the MME forwards the received PDU session identifier to be switched and the QoS requirement of the bearer to the base station in the 4G system.
Step 1006, the base station establishes the PDU session according to the received PDU session identifier to be switched and the QoS requirement of the bearer.
As shown in fig. 11, a session management function SMF entity according to a first embodiment of the present invention includes: a processor 1100, a memory 1101, and a bus interface.
The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 in performing operations. The bus architecture may include any number of interconnected buses and bridges, particularly linked together by various circuits of the one or more processors 1100 and the one or more memories 1101. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1100 is responsible for managing the bus architecture and general processing, and the memory 1101 may store data used by the processor 1100 in performing operations.
The processes disclosed in the embodiments of the present invention can be implemented in the processor 1100, or implemented by the processor 1100. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1100. The processor 1100 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1101, and the processor 1100 reads information in the memory 1101, and completes the steps of the signal processing flow in combination with hardware thereof.
Specifically, the processor 1100 is configured to read a program in the memory 1101 and execute:
determining guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for UE;
and sending a first QoS requirement containing the information of the guaranteed bit rate to a first access network node currently accessed by the UE, and indicating that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the processor 1100 is specifically configured to:
determining guaranteed code rate information corresponding to the default QoS flow according to guaranteed code rate information included in at least one PCC rule corresponding to the default QoS flow; or
And receiving default guaranteed bit rate information notified by the PCF entity, and taking the default guaranteed bit rate information as guaranteed bit rate information corresponding to the default QoS flow.
Optionally, the processor 1100 is further configured to:
after a first QoS requirement containing the guaranteed bit rate information is sent to a first access network node which the UE is currently accessed to, receiving a first response message which is sent by the first access network node and represents that the PDU session is successfully established; wherein the first response message is sent by the first access network node after determining that the air interface resource can meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the processor 1100 is further configured to:
after sending a first QoS requirement containing the guaranteed bit rate information to a first access network node currently accessed by the UE, receiving a second response message which is sent by the first access network node and indicates that the PDU session is failed to be established, and deleting the PDU session; and sending, by the first access network node, the second response message after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the processor 1100 is further configured to:
and sending a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE, so that the first access network node allocates resources for the default QoS flow according to the second QoS requirement when determining that air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, and establishes the PDU session.
Optionally, the processor 1100 is further configured to:
after receiving a first response message which is sent by the first access network node and indicates that the PDU session is successfully established, and receiving a first indication message which is sent by the first access network node and indicates that the PDU session is deleted, deleting the PDU session; the first indication message is sent after the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the processor 1100 is further configured to:
after receiving a first response message which is sent by the first access network node and indicates that the PDU session is successfully established, and receiving a second indication message which is sent by the first access network node and indicates that the default QoS flow is updated, updating the stored context information according to the second QoS requirement contained in the second indication message; and the second indication message is sent after the first access network node allocates resources to the default QoS flow according to the second QoS requirement after determining that the changed air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the processor 1100 is further configured to:
determining a default bearer in a target mobile communication system corresponding to the default QoS flow, and determining a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; wherein the target mobile communication system is different from a mobile communication system currently accessed by the UE;
sending the third QoS requirement to the first access network node; and the first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is handed over to the base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources to the default bearer according to the third QoS requirement.
As shown in fig. 12, a first access network node according to the embodiment of the present invention includes: a processor 1200, a memory 1201, a transceiver 1202, and a bus interface.
The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1201 may store data used by the processor 1200 in performing operations. The bus architecture may include any number of interconnected buses and bridges, particularly linked together by various circuits of the one or more processors 1200 and the one or more memories 1201. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1201 may store data used by the processor 1200 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 1200, or implemented by the processor 1200. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1200. The processor 1200 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1201, and the processor 1200 reads information in the memory 1201 and completes steps of the signal processing flow in combination with hardware thereof.
Specifically, the processor 1200 is configured to read a program in the memory 1201 and execute:
receiving a first QoS requirement which is sent by an SMF entity and contains information of guaranteed code rate, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for UE; the first access network node is an access network node currently accessed by the UE;
and after determining that the air interface resource can meet the first QoS requirement, establishing the PDU session.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the processor 1200 is further configured to:
and after the first access network node determines that the air interface resource can meet the first QoS requirement, the PDU session is established, and then a first response message indicating that the PDU session is successfully established is sent to the SMF entity.
Optionally, the processor 1200 is further configured to:
and after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, sending a second response message to the SMF entity, wherein the second response message indicates that the PDU session is failed to be established, so that the SMF entity deletes the PDU session after receiving the second response message.
Optionally, the processor 1200 is further configured to:
receiving a second QoS requirement comprising a 5QI of non-GBR type sent by the SMF entity;
and when determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, allocating resources for the default QoS flow according to the second QoS requirement, and establishing the PDU session.
Optionally, the processor 1200 is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established, determining that air interface resources are changed, wherein the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow; and deleting the PDU session, and sending a first indication message representing the deletion of the PDU session to the SMF entity.
Optionally, the processor 1200 is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established, determining that air interface resources are changed, wherein the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow; allocating resources for the default QoS flow according to the second QoS requirement; sending a second indication message indicating to update a default QoS flow to the SMF entity.
Optionally, the processor 1200 is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session established for the UE needs to be switched to a second access network node is determined, the QoS flow information of the PDU session is notified to the second access network node, where the QoS flow information includes the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow, so that the second access network node allows switching of the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, the processor 1200 is further configured to:
after the QoS flow information of the PDU session is notified to the second access network node, receiving a third indication message which is sent by the second access network node and indicates that the PDU session is allowed to be switched, and switching the PDU session; and the third indication message is sent after the second access network node determines that the PDU session is allowed to be switched according to the fact that air interface resources can meet the first QoS requirement.
Optionally, the processor 1200 is further configured to:
after the QoS flow information of the PDU session is notified to the second access network node, receiving a fourth indication message which is sent by the second access network node and indicates that the PDU session is not allowed to be switched, and determining that the PDU session cannot be switched; and the fourth indication message is sent by the second access network node after determining that the PDU session is not allowed to be switched according to that air interface resources cannot meet the first QoS requirement.
Optionally, the processor 1200 is further configured to:
receiving a third QoS requirement which is corresponding to a default bearer and contains a 5QI of a non-GBR type and is sent by the SMF entity before a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established; the default bearer is a bearer in a target mobile communication system corresponding to the default QoS flow, and the target mobile communication system is different from a mobile communication system currently accessed by the UE;
the processor is further configured to:
determining that the UE is handed over to a base station in the target mobile communication system after a first response message indicating that the PDU session establishment is successful, which is sent to the SMF entity; and sending the third QoS requirement to a base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
As shown in fig. 13, an access network node according to a second embodiment of the present invention includes: a processor 1300, a memory 1301, a transceiver 1302, and a bus interface.
The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1301 may store data used by the processor 1300 in performing operations. The bus architecture may include any number of interconnected buses and bridges, particularly linked together by various circuits of the one or more processors 1300 and the one or more memories 1301. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1300 is responsible for managing the bus architecture and general processing, and the memory 1301 may store data used by the processor 1300 in performing operations.
The processes disclosed in the embodiments of the present invention may be implemented in the processor 1300 or implemented by the processor 1300. In implementation, the steps of the signal processing flow may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 1300. The processor 1300 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1301, and the processor 1300 reads information in the memory 1301 and completes the steps of the signal processing flow in combination with hardware thereof.
Specifically, the processor 1300 is configured to read the program in the memory 1301 and execute:
a second access network node receives QoS flow information of a PDU session sent by a first access network node which is currently accessed by UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second access network node allows the PDU session to be switched after determining that the air interface resource can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the processor 1300 is further configured to:
after determining that the air interface resource can meet the first QoS requirement and switching of the PDU session is allowed, sending a third indication message indicating that switching of the PDU session is allowed to the first access network node, so that the first access network node switches the PDU session after receiving the third indication message.
Optionally, the processor 1300 is further configured to:
after determining that the air interface resource cannot meet the first QoS requirement, sending a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node, so that the first access network node determines that the PDU session cannot be switched after receiving the fourth indication message.
Optionally, the QoS flow information further includes a second QoS requirement corresponding to the default QoS flow and including a 5QI of non-GBR type, and the processor 1300 is further configured to:
and after determining that the air interface resources cannot meet the first QoS requirement, allocating resources for the default QoS flow according to the second QoS requirement, and allowing the PDU session to be switched.
As shown in fig. 14, a second session management function SMF entity provided in an embodiment of the present invention includes:
a determining module 1401, configured to determine guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for a UE;
a sending module 1402, configured to send a first QoS requirement including the guaranteed bit rate information to a first access network node currently accessed by the UE, and indicate that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that an air interface resource can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the processor 1100 is specifically configured to:
determining guaranteed code rate information corresponding to the default QoS flow according to guaranteed code rate information included in at least one PCC rule corresponding to the default QoS flow; or
And receiving default guaranteed bit rate information notified by the PCF entity, and taking the default guaranteed bit rate information as guaranteed bit rate information corresponding to the default QoS flow.
Optionally, the determining module 1401 is further configured to:
after a first QoS requirement containing the guaranteed bit rate information is sent to a first access network node which the UE is currently accessed to, receiving a first response message which is sent by the first access network node and represents that the PDU session is successfully established; wherein the first response message is sent by the first access network node after determining that the air interface resource can meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the sending module 1402 is further configured to:
after sending a first QoS requirement containing the guaranteed bit rate information to a first access network node currently accessed by the UE, receiving a second response message which is sent by the first access network node and indicates that the PDU session is failed to be established, and deleting the PDU session; and sending, by the first access network node, the second response message after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the sending module 1402 is further configured to:
and sending a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE, so that the first access network node allocates resources for the default QoS flow according to the second QoS requirement when determining that air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, and establishes the PDU session.
Optionally, the sending module 1402 is further configured to:
after receiving a first response message which is sent by the first access network node and indicates that the PDU session is successfully established, and receiving a first indication message which is sent by the first access network node and indicates that the PDU session is deleted, deleting the PDU session; the first indication message is sent after the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the sending module 1402 is further configured to:
after receiving a first response message which is sent by the first access network node and indicates that the PDU session is successfully established, and receiving a second indication message which is sent by the first access network node and indicates that the default QoS flow is updated, updating the stored context information according to the second QoS requirement contained in the second indication message; and the second indication message is sent after the first access network node allocates resources to the default QoS flow according to the second QoS requirement after determining that the changed air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the sending module 1402 is further configured to:
determining a default bearer in a target mobile communication system corresponding to the default QoS flow, and determining a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; wherein the target mobile communication system is different from a mobile communication system currently accessed by the UE;
sending the third QoS requirement to the first access network node; and the first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is handed over to the base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources to the default bearer according to the third QoS requirement.
As shown in fig. 15, a second first access network node according to an embodiment of the present invention includes:
a first receiving module 1501, configured to receive a first QoS requirement that includes information on a guaranteed bit rate and is sent by an SMF entity, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for a UE; the first access network node is an access network node currently accessed by the UE;
a first processing module 1502, configured to establish the PDU session after determining that the air interface resource can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the first processing module 1502 is further configured to:
and after determining that the air interface resource can meet the first QoS requirement and establishing the PDU session, sending a first response message indicating that the PDU session is successfully established to the SMF entity.
Optionally, the first processing module 1502 is further configured to:
and after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, sending a second response message to the SMF entity, wherein the second response message indicates that the PDU session is failed to be established, so that the SMF entity deletes the PDU session after receiving the second response message.
Optionally, the first receiving module 1501 is further configured to:
receiving a second QoS requirement comprising a 5QI of non-GBR type sent by the SMF entity;
the first processing module 1502 is further configured to:
and when determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, allocating resources for the default QoS flow according to the second QoS requirement, and establishing the PDU session.
Optionally, the first processing module 1502 is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established, determining that air interface resources are changed, wherein the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow; and deleting the PDU session, and sending a first indication message representing the deletion of the PDU session to the SMF entity.
Optionally, the first processing module 1502 is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established, determining that air interface resources are changed, wherein the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow; allocating resources for the default QoS flow according to the second QoS requirement; sending a second indication message indicating to update a default QoS flow to the SMF entity.
Optionally, the first processing module 1502 is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session established for the UE needs to be switched to a second access network node is determined, the QoS flow information of the PDU session is notified to the second access network node, where the QoS flow information includes the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow, so that the second access network node allows switching of the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, the first processing module 1502 is further configured to:
after the QoS flow information of the PDU session is notified to the second access network node, receiving a third indication message which is sent by the second access network node and indicates that the PDU session is allowed to be switched, and switching the PDU session; and the third indication message is sent after the second access network node determines that the PDU session is allowed to be switched according to the fact that air interface resources can meet the first QoS requirement.
Optionally, the first processing module 1502 is further configured to:
after the QoS flow information of the PDU session is notified to the second access network node, receiving a fourth indication message which is sent by the second access network node and indicates that the PDU session is not allowed to be switched, and determining that the PDU session cannot be switched; and the fourth indication message is sent by the second access network node after determining that the PDU session is not allowed to be switched according to that air interface resources cannot meet the first QoS requirement.
Optionally, the first processing module 1502 is further configured to:
receiving a third QoS requirement which is corresponding to a default bearer and contains a 5QI of a non-GBR type and is sent by the SMF entity before a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established; the default bearer is a bearer in a target mobile communication system corresponding to the default QoS flow, and the target mobile communication system is different from a mobile communication system currently accessed by the UE;
the first processing module 1502 is further configured to:
determining that the UE is handed over to a base station in the target mobile communication system after a first response message indicating that the PDU session establishment is successful, which is sent to the SMF entity; and sending the third QoS requirement to a base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
As shown in fig. 16, a second access network node according to an embodiment of the present invention includes:
a second receiving module 1601, configured to receive QoS flow information of a PDU session sent by a first access network node to which the UE currently accesses; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
a second processing module 1602, configured to allow switching of the PDU session after determining that the air interface resource can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the second processing module 1602 is further configured to:
after determining that the air interface resource can meet the first QoS requirement and switching of the PDU session is allowed, sending a third indication message indicating that switching of the PDU session is allowed to the first access network node, so that the first access network node switches the PDU session after receiving the third indication message.
Optionally, the second processing module 1602 is further configured to:
after determining that the air interface resource cannot meet the first QoS requirement, sending a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node, so that the first access network node determines that the PDU session cannot be switched after receiving the fourth indication message.
Optionally, the QoS flow information further includes a second QoS requirement containing a 5QI of non-GBR type corresponding to the default QoS flow, and the second processing module 1602 is further configured to:
and after determining that the air interface resources cannot meet the first QoS requirement, allocating resources for the default QoS flow according to the second QoS requirement, and allowing the PDU session to be switched.
A computer-readable storage medium is further provided in an embodiment of the present invention, and a computer program is stored thereon, where the computer program, when executed by a processor, implements the steps of the SMF entity in the embodiment of the present invention, or the steps of the first access network node in the embodiment of the present invention, or the steps of the second access network node in the embodiment of the present invention.
Based on the same inventive concept, the embodiment of the present invention further provides a method for processing a PDU session, and since the device corresponding to the method is an SMF entity in the system for processing a PDU session in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the method can be implemented by referring to the implementation of the device, and repeated details are omitted.
As shown in fig. 17, a flowchart of a method for processing a PDU session according to a first embodiment of the present invention is shown.
Step 1701, the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow of the PDU session established for the UE;
step 1702, the SMF entity sends a first QoS requirement including the guaranteed bit rate information to a first access network node to which the UE is currently accessed, and indicates that the first QoS requirement corresponds to the default QoS flow, so that the first access network node establishes the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, the determining, by the SMF entity, guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for the UE includes:
the SMF entity determines the guaranteed code rate information corresponding to the default QoS flow according to the guaranteed code rate information included in at least one PCC rule corresponding to the default QoS flow; or
And the SMF entity receives the default guaranteed bit rate information notified by the PCF entity and takes the default guaranteed bit rate information as the guaranteed bit rate information corresponding to the default QoS flow.
Optionally, after the SMF entity sends the first QoS requirement including the guaranteed bit rate information to the first access network node currently accessed by the UE, the method further includes:
the SMF entity receives a first response message which is sent by the first access network node and represents that the PDU session is successfully established; wherein the first response message is sent by the first access network node after determining that the air interface resource can meet the first QoS requirement corresponding to the default QoS flow.
Optionally, after the SMF entity sends the first QoS requirement including the guaranteed bit rate information to the first access network node currently accessed by the UE, the method further includes:
the SMF entity receives a second response message which is sent by the first access network node and represents that the PDU session is failed to be established, and deletes the PDU session; and sending, by the first access network node, the second response message after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the method further includes:
and the SMF entity sends a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE, so that the first access network node allocates resources for the default QoS flow according to the second QoS requirement when determining that air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, and establishes the PDU session.
Optionally, after the SMF entity receives a first response message indicating that the PDU session establishment is successful, where the first response message is sent by the first access network node, the method further includes:
after the SMF entity receives a first indication message which is sent by the first access network node and represents that the PDU session is deleted, the PDU session is deleted; the first indication message is sent after the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, after the SMF entity receives a first response message indicating that the PDU session establishment is successful, where the first response message is sent by the first access network node, the method further includes:
after receiving a second indication message which is sent by the first access network node and indicates that a default QoS flow is updated, the SMF entity updates the stored context information according to the second QoS requirement contained in the second indication message; and the second indication message is sent after the first access network node allocates resources to the default QoS flow according to the second QoS requirement after determining that the changed air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow.
Optionally, the method further includes:
the SMF entity determines a default bearer in a target mobile communication system corresponding to the default QoS flow and determines a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; wherein the target mobile communication system is different from a mobile communication system currently accessed by the UE;
the SMF entity sending the third QoS requirement to the first access network node; and the first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is handed over to the base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources to the default bearer according to the third QoS requirement.
Based on the same inventive concept, the embodiment of the present invention further provides a second method for processing a PDU session, and since the device corresponding to the method is the first access network node in the system for processing a PDU session in the embodiment of the present invention, and the principle of the method for solving the problem is similar to that of the device, the method can be implemented by referring to the implementation of the device, and repeated details are omitted.
As shown in fig. 18, a flowchart of a processing method for a PDU session according to a second embodiment of the present invention is shown.
Step 1801, a first access network node receives a first QoS requirement containing information of guaranteed bit rate sent by an SMF entity, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for a UE; the first access network node is an access network node currently accessed by the UE;
step 1802, after determining that the air interface resource can meet the first QoS requirement, the first access network node establishes the PDU session.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, after the first access network node establishes the PDU session after determining that the air interface resource can meet the first QoS requirement, the method further includes:
and the first access network node sends a first response message indicating that the PDU session is successfully established to the SMF entity.
Optionally, the method further includes:
and after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node sends a second response message indicating that the PDU session establishment fails to the SMF entity, so that the SMF entity deletes the PDU session after receiving the second response message.
Optionally, the method further includes:
the first access network node receives a second QoS requirement which is sent by the SMF entity and contains a 5QI of a non-GBR type;
and when determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node allocates resources for the default QoS flow according to the second QoS requirement, and establishes the PDU session.
Optionally, after the first response message indicating that the PDU session establishment is successful, the method further includes, after the first response message is sent by the first access network node to the SMF entity:
the first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
and the first access network node deletes the PDU session and sends a first indication message for indicating the deletion of the PDU session to the SMF entity.
Optionally, after the first response message indicating that the PDU session establishment is successful, the method further includes, after the first response message is sent by the first access network node to the SMF entity:
the first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
the first access network node allocating resources to the default QoS flow according to the second QoS requirement;
the first access network node sends a second indication message to the SMF entity indicating that a default QoS flow is updated.
Optionally, after the first response message indicating that the PDU session establishment is successful, the method further includes, after the first response message is sent by the first access network node to the SMF entity:
after determining that the PDU session established for the UE needs to be switched to a second access network node, the first access network node notifies the second access network node of QoS flow information of the PDU session, where the QoS flow information includes the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow, so that the second access network node allows switching of the PDU session after determining that air interface resources can meet the first QoS requirement.
Optionally, after the first access network node notifies the second access network node of the QoS flow information of the PDU session, the method further includes:
the first access network node receives a third indication message which is sent by a second access network node and indicates that the PDU session is allowed to be switched, and the PDU session is switched; and the third indication message is sent after the second access network node determines that the PDU session is allowed to be switched according to the fact that air interface resources can meet the first QoS requirement.
Optionally, after the first access network node notifies the second access network node of the QoS flow information of the PDU session, the method further includes:
the first access network node receives a fourth indication message which is sent by a second access network node and indicates that the PDU session is not allowed to be switched, and determines that the PDU session cannot be switched; and the fourth indication message is sent by the second access network node after determining that the PDU session is not allowed to be switched according to that air interface resources cannot meet the first QoS requirement.
Optionally, before the first response message indicating that the PDU session establishment is successful, the method further includes:
the first access network node receives a third QoS requirement which is corresponding to a default bearer and contains 5QI of a non-GBR type, wherein the third QoS requirement is sent by the SMF entity; the default bearer is a bearer in a target mobile communication system corresponding to the default QoS flow, and the target mobile communication system is different from a mobile communication system currently accessed by the UE;
after the first response message indicating that the PDU session establishment is successful, sent by the first access network node to the SMF entity, the method further includes:
the first access network node determines that the UE is switched to a base station in the target mobile communication system;
and the first access network node sends the third QoS requirement to a base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
Based on the same inventive concept, a third method for processing a PDU session is also provided in the embodiments of the present invention, and since the device corresponding to the method is the second access network node in the system for processing a PDU session in the embodiments of the present invention, and the principle of the method for solving the problem is similar to that of the device, the method can be implemented by referring to the implementation of the device, and repeated details are omitted.
As shown in fig. 19, a flowchart of a processing method for a PDU session according to a third embodiment of the present invention is shown.
Step 1901, the second access network node receives QoS flow information of a PDU session sent by the first access network node to which the UE currently accesses; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
step 1902, after determining that the air interface resource can meet the first QoS requirement, the second access network node allows to switch the PDU session.
Optionally, the first QoS requirement further includes a 5QI of GBR type.
Optionally, after the second access network node determines that the air interface resource can meet the first QoS requirement, and then allows to switch the PDU session, the method further includes:
and the second access network node sends a third indication message indicating that the PDU session is allowed to be switched to the first access network node, so that the first access network node switches the PDU session after receiving the third indication message.
Optionally, the method further includes:
and after determining that the air interface resource cannot meet the first QoS requirement, the second access network node sends a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node, so that the first access network node determines that the PDU session cannot be switched after receiving the fourth indication message.
Optionally, the QoS flow information further includes a second QoS requirement containing a 5QI of non-GBR type corresponding to the default QoS flow, and the method further includes:
and after determining that the air interface resources cannot meet the first QoS requirement, the second access network node allocates resources for the default QoS flow according to the second QoS requirement and allows switching of the PDU session.
The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.
Accordingly, the subject application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Furthermore, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (54)

1. A method for handling a packet data unit, PDU, session, the method comprising:
a Session Management Function (SMF) entity determines guaranteed bit rate information corresponding to a default quality of service (QoS) flow of a Protocol Data Unit (PDU) session established for User Equipment (UE);
and the SMF entity sends a first QoS requirement containing the guaranteed code rate information to a first access network node currently accessed by the UE and indicates that the first QoS requirement corresponds to the default QoS flow.
2. The method of claim 1, wherein the first QoS requirement further comprises a 5QI of GBR type.
3. The method of claim 1, wherein the SMF entity determining guaranteed code rate information corresponding to a default QoS flow for a PDU session established for the UE comprises:
the SMF entity determines the guaranteed bit rate information corresponding to the default QoS flow according to the guaranteed bit rate information included in at least one Policy and Charging Control (PCC) rule corresponding to the default QoS flow; or
And the SMF entity receives default guaranteed bit rate information notified by a policy control function PCF entity and takes the default guaranteed bit rate information as guaranteed bit rate information corresponding to the default QoS flow.
4. The method of any of claims 1 to 3, wherein after the SMF entity sends the first QoS requirement including the guaranteed code rate information to a first access network node currently accessed by the UE, the method further comprises:
the SMF entity receives a first response message which is sent by the first access network node and represents that the PDU session is successfully established; wherein the first response message is sent by the first access network node after determining that the air interface resource can meet the first QoS requirement corresponding to the default QoS flow.
5. The method of any of claims 1 to 3, wherein after the SMF entity sends the first QoS requirement including the guaranteed code rate information to a first access network node currently accessed by the UE, the method further comprises:
the SMF entity receives a second response message which is sent by the first access network node and represents that the PDU session is failed to be established, and deletes the PDU session; and sending, by the first access network node, the second response message after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
6. The method of claim 4, further comprising:
and the SMF entity sends a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE, so that the first access network node allocates resources for the default QoS flow according to the second QoS requirement when determining that air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, and establishes the PDU session.
7. The method of claim 4, wherein after the SMF entity receives a first response message sent by the first access network node indicating that PDU session establishment was successful, further comprising:
after the SMF entity receives a first indication message which is sent by the first access network node and represents that the PDU session is deleted, the PDU session is deleted; the first indication message is sent after the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
8. The method of claim 6, wherein after the SMF entity receives a first response message sent by the first access network node indicating that PDU session establishment was successful, further comprising:
after receiving a second indication message which is sent by the first access network node and indicates that a default QoS flow is updated, the SMF entity updates the stored context information according to the second QoS requirement contained in the second indication message; and the second indication message is sent after the first access network node allocates resources to the default QoS flow according to the second QoS requirement after determining that the changed air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow.
9. The method of claim 4, further comprising:
the SMF entity determines a default bearer in a target mobile communication system corresponding to the default QoS flow and determines a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; wherein the target mobile communication system is different from a mobile communication system currently accessed by the UE;
the SMF entity sending the third QoS requirement to the first access network node; and the first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is handed over to the base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources to the default bearer according to the third QoS requirement.
10. A method for processing PDU session, the method comprising:
a first access network node receives a first QoS requirement which is sent by an SMF entity and contains code rate guarantee information, and the first QoS requirement corresponds to an indication of a default QoS flow of a PDU session which is established for UE by the SMF entity; the first access network node is an access network node currently accessed by the UE;
and the first access network node establishes the PDU session after determining that the air interface resource can meet the first QoS requirement.
11. The method of claim 10, wherein the first QoS requirement further comprises a 5QI of GBR type.
12. The method of claim 10 or 11, wherein after the first access network node establishes the PDU session after determining that air interface resources can meet the first QoS requirement, further comprising:
and the first access network node sends a first response message indicating that the PDU session is successfully established to the SMF entity.
13. The method of claim 10 or 11, further comprising:
and after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node sends a second response message indicating that the PDU session establishment fails to the SMF entity, so that the SMF entity deletes the PDU session after receiving the second response message.
14. The method of claim 12, further comprising:
the first access network node receives a second QoS requirement which is sent by the SMF entity and contains a 5QI of a non-GBR type;
and when determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, the first access network node allocates resources for the default QoS flow according to the second QoS requirement, and establishes the PDU session.
15. The method of claim 12, further comprising, after the first response message sent by the first access network node to the SMF entity indicating that PDU session establishment was successful:
the first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
and the first access network node deletes the PDU session and sends a first indication message for indicating the deletion of the PDU session to the SMF entity.
16. The method of claim 14, wherein after the first response message sent by the first access network node to the SMF entity indicating that the PDU session establishment was successful, further comprising:
the first access network node determines that air interface resources change, and the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow;
the first access network node allocating resources to the default QoS flow according to the second QoS requirement;
the first access network node sends a second indication message to the SMF entity indicating that a default QoS flow is updated.
17. The method of claim 12, further comprising, after the first response message sent by the first access network node to the SMF entity indicating that PDU session establishment was successful:
after determining that the PDU session established for the UE needs to be switched to a second access network node, the first access network node notifies the second access network node of QoS flow information of the PDU session, where the QoS flow information includes the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow, so that the second access network node allows switching of the PDU session after determining that air interface resources can meet the first QoS requirement.
18. The method of claim 17, wherein after the first access network node notifies the second access network node of QoS flow information for the PDU session, further comprising:
the first access network node receives a third indication message which is sent by a second access network node and indicates that the PDU session is allowed to be switched, and the PDU session is switched; and the third indication message is sent after the second access network node determines that the PDU session is allowed to be switched according to the fact that air interface resources can meet the first QoS requirement.
19. The method of claim 17, wherein after the first access network node notifies the second access network node of QoS flow information for the PDU session, further comprising:
the first access network node receives a fourth indication message which is sent by a second access network node and indicates that the PDU session is not allowed to be switched, and determines that the PDU session cannot be switched; and the fourth indication message is sent by the second access network node after determining that the PDU session is not allowed to be switched according to that air interface resources cannot meet the first QoS requirement.
20. The method of claim 12, wherein prior to the first response message sent by the first access network node to the SMF entity indicating that the PDU session establishment was successful, further comprising:
the first access network node receives a third QoS requirement which is corresponding to a default bearer and contains 5QI of a non-GBR type, wherein the third QoS requirement is sent by the SMF entity; the default bearer is a bearer in a target mobile communication system corresponding to the default QoS flow, and the target mobile communication system is different from a mobile communication system currently accessed by the UE;
after the first response message indicating that the PDU session establishment is successful, sent by the first access network node to the SMF entity, the method further includes:
the first access network node determines that the UE is switched to a base station in the target mobile communication system;
and the first access network node sends the third QoS requirement to a base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
21. A method for processing PDU session, the method comprising:
a second access network node receives QoS flow information of a PDU session sent by a first access network node which is currently accessed by UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second access network node allows the PDU session to be switched after determining that the air interface resource can meet the first QoS requirement.
22. The method of claim 21, wherein the first QoS requirement further comprises a 5QI of GBR type.
23. The method of claim 21 or 22, wherein after the second access network node determines that air interface resources can meet the first QoS requirement, allowing the PDU session to be switched, further comprising:
and the second access network node sends a third indication message indicating that the PDU session is allowed to be switched to the first access network node, so that the first access network node switches the PDU session after receiving the third indication message.
24. The method of claim 21 or 22, further comprising:
and after determining that the air interface resource cannot meet the first QoS requirement, the second access network node sends a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node, so that the first access network node determines that the PDU session cannot be switched after receiving the fourth indication message.
25. The method of claim 21 or 22, wherein the QoS flow information further includes a second QoS requirement comprising a 5QI of non-GBR type corresponding to the default QoS flow, the method further comprising:
and after determining that the air interface resources cannot meet the first QoS requirement, the second access network node allocates resources for the default QoS flow according to the second QoS requirement and allows switching of the PDU session.
26. A session management function, SMF, entity, comprising: a processor, a memory;
the processor is used for reading the program in the memory and executing:
determining guaranteed bit rate information corresponding to a default QoS flow of a PDU session established for UE;
and sending a first QoS requirement containing the information of the guaranteed code rate to a first access network node currently accessed by the UE, and indicating that the first QoS requirement corresponds to the default QoS flow.
27. The SMF entity of claim 26, wherein the first QoS requirement further comprises a 5QI of GBR type.
28. The SMF entity of claim 26, wherein the processor is specifically configured to:
determining guaranteed code rate information corresponding to the default QoS flow according to guaranteed code rate information included in at least one PCC rule corresponding to the default QoS flow; or
And receiving default guaranteed bit rate information notified by the PCF entity, and taking the default guaranteed bit rate information as guaranteed bit rate information corresponding to the default QoS flow.
29. The SMF entity of any of claims 26 to 28, wherein said processor is further configured to:
after a first QoS requirement containing the guaranteed bit rate information is sent to a first access network node which the UE is currently accessed to, receiving a first response message which is sent by the first access network node and represents that the PDU session is successfully established; wherein the first response message is sent by the first access network node after determining that the air interface resource can meet the first QoS requirement corresponding to the default QoS flow.
30. The SMF entity of any of claims 26 to 28, wherein said processor is further configured to:
after sending a first QoS requirement containing the guaranteed bit rate information to a first access network node currently accessed by the UE, receiving a second response message which is sent by the first access network node and indicates that the PDU session is failed to be established, and deleting the PDU session; and sending, by the first access network node, the second response message after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
31. The SMF entity of claim 29, wherein the processor is further configured to:
and sending a second QoS requirement containing 5QI of a non-GBR type to a first access network node currently accessed by the UE, so that the first access network node allocates resources for the default QoS flow according to the second QoS requirement when determining that air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, and establishes the PDU session.
32. The SMF entity of claim 29, wherein the processor is further configured to:
after receiving a first response message which is sent by the first access network node and indicates that the PDU session is successfully established, and receiving a first indication message which is sent by the first access network node and indicates that the PDU session is deleted, deleting the PDU session; the first indication message is sent after the first access network node determines that the air interface resource changes, and the changed air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow.
33. The SMF entity of claim 31, wherein the processor is further configured to:
after receiving a first response message which is sent by the first access network node and indicates that the PDU session is successfully established, and receiving a second indication message which is sent by the first access network node and indicates that the default QoS flow is updated, updating the stored context information according to the second QoS requirement contained in the second indication message; and the second indication message is sent after the first access network node allocates resources to the default QoS flow according to the second QoS requirement after determining that the changed air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow.
34. The SMF entity of claim 29, wherein the processor is further configured to:
determining a default bearer in a target mobile communication system corresponding to the default QoS flow, and determining a third QoS requirement of 5QI containing a non-GBR type corresponding to the default bearer; wherein the target mobile communication system is different from a mobile communication system currently accessed by the UE;
sending the third QoS requirement to the first access network node; and the first access network node sends the third QoS requirement to the base station in the target mobile communication system after determining that the UE is handed over to the base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources to the default bearer according to the third QoS requirement.
35. A first access network node, comprising: a processor, a memory;
the processor is used for reading the program in the memory and executing:
receiving a first QoS requirement which is sent by an SMF entity and contains information of guaranteed code rate, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for UE; the first access network node is an access network node currently accessed by the UE;
and after determining that the air interface resource can meet the first QoS requirement, establishing the PDU session.
36. The first access network node of claim 35, wherein the first QoS requirement further includes a 5QI of GBR type.
37. The first access network node in claim 35 or 36, wherein the processor is further configured to:
and after determining that the air interface resource can meet the first QoS requirement and establishing the PDU session, sending a first response message indicating that the PDU session is successfully established to the SMF entity.
38. The first access network node in claim 35 or 36, wherein the processor is further configured to:
and after determining that the air interface resource cannot meet the first QoS requirement corresponding to the default QoS flow, sending a second response message to the SMF entity, wherein the second response message indicates that the PDU session is failed to be established, so that the SMF entity deletes the PDU session after receiving the second response message.
39. The first access network node of claim 37, wherein the processor is further configured to:
receiving a second QoS requirement comprising a 5QI of non-GBR type sent by the SMF entity;
and when determining that the air interface resources cannot meet the first QoS requirement corresponding to the default QoS flow, allocating resources for the default QoS flow according to the second QoS requirement, and establishing the PDU session.
40. The first access network node of claim 37, wherein the processor is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established, determining that air interface resources are changed, wherein the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow; and deleting the PDU session, and sending a first indication message representing the deletion of the PDU session to the SMF entity.
41. The first access network node of claim 39, wherein the processor is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established, determining that air interface resources are changed, wherein the changed air interface resources cannot meet a first QoS requirement corresponding to the default QoS flow; allocating resources for the default QoS flow according to the second QoS requirement; sending a second indication message indicating to update a default QoS flow to the SMF entity.
42. The first access network node of claim 37, wherein the processor is further configured to:
after a first response message which is sent to the SMF entity and indicates that the PDU session established for the UE needs to be switched to a second access network node is determined, the QoS flow information of the PDU session is notified to the second access network node, where the QoS flow information includes the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow, so that the second access network node allows switching of the PDU session after determining that air interface resources can meet the first QoS requirement.
43. The first access network node of claim 42, wherein the processor is further configured to:
after the QoS flow information of the PDU session is notified to the second access network node, receiving a third indication message which is sent by the second access network node and indicates that the PDU session is allowed to be switched, and switching the PDU session; and the third indication message is sent after the second access network node determines that the PDU session is allowed to be switched according to the fact that air interface resources can meet the first QoS requirement.
44. The first access network node of claim 42, wherein the processor is further configured to:
after the QoS flow information of the PDU session is notified to the second access network node, receiving a fourth indication message which is sent by the second access network node and indicates that the PDU session is not allowed to be switched, and determining that the PDU session cannot be switched; and the fourth indication message is sent by the second access network node after determining that the PDU session is not allowed to be switched according to that air interface resources cannot meet the first QoS requirement.
45. The first access network node of claim 37, wherein the processor is further configured to:
receiving a third QoS requirement which is corresponding to a default bearer and contains a 5QI of a non-GBR type and is sent by the SMF entity before a first response message which is sent to the SMF entity and indicates that the PDU session is successfully established; the default bearer is a bearer in a target mobile communication system corresponding to the default QoS flow, and the target mobile communication system is different from a mobile communication system currently accessed by the UE;
the processor is further configured to:
determining that the UE is handed over to a base station in the target mobile communication system after a first response message indicating that the PDU session establishment is successful, which is sent to the SMF entity; and sending the third QoS requirement to a base station in the target mobile communication system, so that the base station in the target mobile communication system allocates resources for the default bearer according to the third QoS requirement.
46. A second access network node, comprising: a processor, a memory;
the processor is used for reading the program in the memory and executing:
a second access network node receives QoS flow information of a PDU session sent by a first access network node which is currently accessed by UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second access network node allows the PDU session to be switched after determining that the air interface resource can meet the first QoS requirement.
47. The second access network node of claim 46, wherein the first QoS requirement further comprises a 5QI of GBR type.
48. The second access network node in claims 46 or 47, wherein the processor is further configured to:
after determining that the air interface resource can meet the first QoS requirement and switching of the PDU session is allowed, sending a third indication message indicating that switching of the PDU session is allowed to the first access network node, so that the first access network node switches the PDU session after receiving the third indication message.
49. The second access network node in claims 46 or 47, wherein the processor is further configured to:
after determining that the air interface resource cannot meet the first QoS requirement, sending a fourth indication message indicating that the PDU session is not allowed to be switched to the first access network node, so that the first access network node determines that the PDU session cannot be switched after receiving the fourth indication message.
50. The second access network node in claim 46 or 47, wherein the QoS flow information further includes a second QoS requirement for a 5QI containing a non-GBR type corresponding to the default QoS flow, and wherein the processor is further configured to:
and after determining that the air interface resources cannot meet the first QoS requirement, allocating resources for the default QoS flow according to the second QoS requirement, and allowing the PDU session to be switched.
51. A session management function, SMF, entity, comprising:
the device comprises a determining module, a sending module and a receiving module, wherein the determining module is used for determining the guaranteed bit rate information corresponding to the default QoS flow of the PDU session established for the UE;
a sending module, configured to send a first QoS requirement including the guaranteed bit rate information to a first access network node currently accessed by the UE, and indicate that the first QoS requirement corresponds to the default QoS flow.
52. A first access network node, comprising:
a first receiving module, configured to receive a first QoS requirement that includes guaranteed bit rate information and is sent by an SMF entity, and an indication that the first QoS requirement corresponds to a default QoS flow of a PDU session established by the SMF entity for a UE; the first access network node is an access network node currently accessed by the UE;
and the first processing module is configured to establish the PDU session after determining that the air interface resource can meet the first QoS requirement.
53. A second access network node, comprising:
the second receiving module is used for receiving the QoS flow information of the PDU session sent by the first access network node which is currently accessed by the UE; the QoS flow information comprises the first QoS requirement and an indication that the first QoS requirement corresponds to a default QoS flow;
and the second processing module is used for allowing the PDU session to be switched after the air interface resource is determined to meet the first QoS requirement.
54. A computer-readable medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 9, or the steps of the method according to any one of claims 10 to 20, or the steps of the method according to any one of claims 21 to 25.
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