WO2019223690A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2019223690A1
WO2019223690A1 PCT/CN2019/087827 CN2019087827W WO2019223690A1 WO 2019223690 A1 WO2019223690 A1 WO 2019223690A1 CN 2019087827 W CN2019087827 W CN 2019087827W WO 2019223690 A1 WO2019223690 A1 WO 2019223690A1
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WO
WIPO (PCT)
Prior art keywords
quality
network device
access network
service flow
information
Prior art date
Application number
PCT/CN2019/087827
Other languages
English (en)
French (fr)
Inventor
孙海洋
熊春山
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to KR1020207036641A priority Critical patent/KR102434931B1/ko
Priority to BR112020023685-3A priority patent/BR112020023685A2/pt
Priority to EP19807377.7A priority patent/EP3790314B1/en
Priority to AU2019272364A priority patent/AU2019272364C1/en
Priority to EP23208341.0A priority patent/EP4354832A2/en
Priority to JP2020565351A priority patent/JP7048763B2/ja
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to ES19807377T priority patent/ES2967399T3/es
Publication of WO2019223690A1 publication Critical patent/WO2019223690A1/zh
Priority to US17/100,190 priority patent/US11575754B2/en
Priority to JP2022047594A priority patent/JP2022109906A/ja
Priority to US18/154,537 priority patent/US20230147304A1/en
Priority to US18/365,564 priority patent/US20240048624A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H04W36/0044—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information of quality context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/56—Provisioning of proxy services
    • H04L67/562—Brokering proxy services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/38—Reselection control by fixed network equipment
    • H04W36/385—Reselection control by fixed network equipment of the core network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/14—Session management
    • H04L67/141—Setup of application sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
    • H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0268—Traffic management, e.g. flow control or congestion control using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR]

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device.
  • a terminal device may establish at least one packet data unit (PDU) session between an access network device and a core network device, and for each PDU session, at least one quality of service ( quality of service (QoS) flow, and each QoS flow is configured with service quality requirements when transmitting data packets using the data radio bearer (DRB) corresponding to the QoS flow.
  • PDU packet data unit
  • QoS quality of service
  • the access network device can notify the core network device of the notification control status corresponding to the QoS flow, and the notification control status is used to indicate The service quality requirements of the QoS flow cannot be met, so that the core network device makes a policy decision on the QoS flow again.
  • the policy decision is, for example, deleting or modifying the QoS flow.
  • the established PDU session in the terminal device can be switched between access network devices. Accordingly, the QoS flow corresponding to the PDU session is also You can switch between access network devices.
  • the DRB established by the source access network device before the switchover and the DRB established by the target access network device after the switchover may be different, the QoS flow when using different DRBs corresponding to the same QoS flow before and after the switchover to transmit data packets The notification control status may also be different.
  • the notification control status of the QoS flow recorded by the core network device is likely to be notified by the source access network device before the switchover, resulting in the target access after the switchover.
  • the notification control status of the QoS flow recorded by the network device and the notification control status of the QoS flow recorded by the core network device may be out of sync, which makes it easy for the core network device to make an incorrect policy decision on the QoS flow.
  • the present application provides a communication method and device, which are used to solve the problem that when the QoS flow is switched at the access network side, the notification control status of the QoS flow recorded at the access network side and the core network side is not synchronized after the handover.
  • a communication method in a process in which at least one QoS flow is switched from a first access network device to a second access network device, the first access network device sends the first access network device to the first access network device.
  • the two access network devices send first information, which is used to indicate that the first access network device has notified the core network device that the quality of service requirements of the at least one QoS flow cannot be met.
  • the second access network device may send the second information to the core network device, and the second information is used to notify the core network device
  • the quality of service requirements of the first QoS flow in the at least one QoS flow can be satisfied, wherein the first QoS flow is a QoS that has been switched from the first access network device to the second access network device flow.
  • the session management function (SMF) network element in the core network device may notify the policy control after receiving the information that the quality of service requirements of the first QoS flow sent by the second access network device can be satisfied.
  • the service quality requirements of the first QoS flow described in a policy (control, function, PCF) network element can be met.
  • the first access network device may notify the second access network device of status information that at least one QoS flow requirement of the core network device has not been met.
  • the quality of service requirements of the first QoS flow that the second access network device can successfully switch by default can be met, and the core network device can be notified The quality of service requirements of the successfully switched QoS flow can be met.
  • the notification control state of the QoS flow perceived by the core network side can be synchronized with the notification control state of the QoS flow recorded by the access network side after the switching, which can avoid the core The network side made the wrong strategic decision.
  • the first information may include an identifier of the at least one QoS flow.
  • the first information may include an identifier of the at least one QoS flow and a notification control status of the at least one QoS flow.
  • the notification control status is a first status, and the first status is used to indicate all The quality of service requirements of at least one QoS flow cannot be met.
  • the first access network device may enable the second access network device to learn about the condition of at least one QoS flow recorded on the core network side. After the switchover, the latest notification control status of the QoS flow is notified to the core network side to ensure that the notification control status recorded by the two is synchronized.
  • the first access network device may send the first information to the second access network device through an interface connected to the second access network device.
  • the first information may be forwarded through the core network side.
  • the first access network device may send the first information to the second access network device through an access and mobility management function (AMF) network element.
  • AMF access and mobility management function
  • the AMF network element may forward the first information in a transparent forwarding manner.
  • the second access network device sends the second information to the core network device, if it detects that the quality of service requirements of the first QoS flow cannot be met, it may immediately send the The core network device sends third information, and the third information is used to notify the core network device that the quality of service of the first QoS flow cannot be satisfied.
  • the above implementation provided in this application can enable the core network device to sense the latest notification control status of QoS flow in time.
  • the SMF network element may determine the received first access network After the notification control state of the at least one QoS flow sent by the device is the first state, the PCF network element is notified that the quality of service requirement of the first QoS flow can be satisfied.
  • the first state is used to indicate that the quality of service requirements of the at least one QoS flow cannot be met.
  • the SMF network element can selectively notify the PCF network element of the latest notification control state of the QoS flow that is inconsistent with the notification control state recorded by the core network side and the access network side after the handover. Consistent QoS flow without re-notification.
  • a communication method is provided.
  • the second access network device may report to the core network device.
  • Send fourth information which is used to notify the core network device that the quality of service requirements of the at least one QoS flow can be met.
  • the SMF network element may send fifth information to the PCF network element, where the fifth information is used A notification control state for notifying the PCF network element of the at least one QoS flow can be satisfied.
  • the at least one QoS flow is all QoS flows that have been successfully switched from the first access network device to the second access network device and need to be notified and controlled.
  • the first access network device before the handover may not be involved, and the second access network device may directly notify the core network device of the notification control status of all the QoS flow after the successful handover, so that the core network device can be timely Perceive notification control status of QoS flow after switching, so that the notification control status of QoS flow detected by the core network side is synchronized with the notification control status of QoS flow recorded by the access network side after the switchover, in order to prevent the core network side from making errors Strategic decisions.
  • the second access network device after the second access network device sends the fourth information to the PCF network element, if it detects that the quality of service requirement of the at least one QoS flow cannot be satisfied, it may immediately notify the The quality of service of the at least one QoS flow of the core network device cannot be satisfied.
  • the above implementation provided in this application can enable the core network device to sense the latest notification control status of QoS flow in time.
  • the SMF network element may determine the received at least one QoS flow sent by the first access network device. After notifying that the control state is the first state, sending fifth information to the PCF network element. The first state is used to indicate that the quality of service requirements of the at least one QoS flow cannot be met.
  • the SMF network element can selectively notify the PCF network element of the latest notification control state of the QoS flow that is inconsistent with the notification control state recorded by the core network side and the access network side after the handover. Consistent QoS flow without re-notification.
  • a communication method is provided.
  • the SMF network element determines the received notification control status of at least one QoS flow sent by the first access network device, and when the second QoS flow in the at least one QoS flow
  • the SMF network element determines a third QoS flow in the second QoS flow where the notification control state is the first state.
  • the SMF network element updates the notification control state of the third QoS flow to a second state, and sends sixth information to the PCF network element, where the sixth information is used to notify the PCF network element
  • the notification control state of the third QoS flow is a second state.
  • the first state is used to indicate that the quality of service requirements of the at least one QoS flow cannot be met
  • the second state is used to indicate that the quality of service requirements of the at least one QoS flow can be met.
  • the SMF network element can default to the previously recorded QoS requirements that cannot be met, and the service quality requirements of the QoS flow can be satisfied again, and then notify the PCF network element to enable the PCF network.
  • the unit can sense the status of the QoS flow after a successful handover in time, thereby avoiding making wrong decisions.
  • the SMF network element may further receive seventh information sent by the AMF network element, and the seventh The information includes an identification of the second QoS flow that has been switched from the first access network device to the second access network device. So that the SMF network element can learn the QoS flow that has been successfully switched.
  • a communication method is provided.
  • the SMF network element may determine that at least one QoS flow is switched from the first access network device to the second access network device, and the SMF network element may send the first to the PCF network element.
  • Eight pieces of information which are used to instruct the at least one QoS flow to be switched from the first access network device to the second access network device.
  • the PCF network element may determine the QoS flow in which the notification control state is the first state in the at least one QoS flow, and update the determined QoS flow's notification control state to The second state.
  • the first state is used to indicate that the determined service quality requirements of the QoS flow cannot be satisfied
  • the second state is used to indicate that the determined service quality requirements of the QoS flow can be satisfied.
  • the PCF network element may be configured with a handover indication trigger (handover indication trigger). After receiving the third information sent by the SMF network element notifying that at least one QoS flow has been successfully switched, it may be triggered to perform an update of the QoS flow. Actions to notify control status.
  • the SMF network element can notify the PCF network element that at least one QoS flow has been successfully switched, so that the PCF network element may sense the QoS flow switch in time, and then update the notification control status of the successfully switched QoS flow in time, so as to The guarantee is synchronized with the notification control status of the QoS flow recorded on the access network side after the handover, to avoid making wrong decisions.
  • the present application provides a first communication device, where the communication device has a function of implementing the first access network device according to the first aspect, for example, the communication device includes the first access network device to execute
  • the above-mentioned first aspect relates to the modules or units or means corresponding to the steps, and the functions or modules or units or means (means) may be implemented by software, or by hardware, or may be implemented by hardware executing corresponding software. .
  • the communication device may include a processing module and a transceiver module.
  • the processing module and the transceiver module may perform corresponding functions related to the first access network device in the method provided in the first aspect or any one of the possible implementation manners of the first aspect.
  • the communication device may include a processor, and may further include a transceiver, where the transceiver is used to transmit and receive signals, and the processor executes program instructions to complete the first aspect and any of the first aspects. The method performed by the first access network device in a possible implementation manner.
  • the communication device may further include one or more memories, where the memories are configured to be coupled to the processor, and the memories store necessary computer program instructions and / or functions necessary to implement functions of the first access network device according to the first aspect. data.
  • the processor may execute computer program instructions stored in the memory to complete the foregoing first aspect and the method performed by the first access network device in any possible implementation manner of the first aspect.
  • the present application provides a second communication device, where the communication device has a function of implementing the first access network device or the second access network device according to the second aspect, for example, the communication device includes the second access device.
  • the network access device executes the modules or units or means corresponding to the steps involved in the first aspect or the second aspect, and the functions or modules or units or means can be implemented by software or hardware.
  • the corresponding software can be implemented by hardware execution.
  • the communication device may include a processing module and a transceiver module.
  • the processing module and the transceiver module may perform the corresponding functions related to the second access network device in the method provided in the first aspect or any possible implementation manner of the first aspect, or the processing module and the transceiver module may perform the foregoing first Corresponding functions related to the second access network device in the method provided in the second aspect or any one of the possible implementation manners of the second aspect.
  • the communication device may include a processor, and may further include a transceiver, where the transceiver is used to transmit and receive signals, and the processor executes program instructions to complete the first aspect and any of the first aspects.
  • the method performed by the second access network device in a possible implementation manner, or the method performed by the second access network device in the second aspect and any possible implementation manner of the second aspect is completed.
  • the communication device may further include one or more memories, where the memories are used for coupling with the processor, and the memories store necessary computer programs for implementing functions of the second access network device according to the first aspect or the second aspect. Instructions and / or data.
  • the processor may execute computer program instructions stored in the memory to complete the first aspect and the method performed by the first access network device in any possible implementation manner of the first aspect, or complete the second aspect and the second aspect. The method performed by the second access network device in any possible implementation of the aspect.
  • the present application provides a third communication device, the communication device having a function of realizing the SMF network element involved in any one of the first to fourth aspects, for example, the communication device includes the SMF network
  • the communication device includes the SMF network
  • the module or unit or means corresponding to the steps in any one of the first to fourth aspects described above may be implemented by the element, and the function or module or unit or means may be implemented by software or hardware. Corresponding software can also be implemented by hardware.
  • the communication device may include a processing module and a transceiver module.
  • the processing module and the transceiver module may perform corresponding functions related to the SMF network element in the method provided by any one of the first aspect to the fourth aspect and the method provided by any possible implementation manner of the aspect.
  • the communication device may include a processor, and may further include a transceiver, where the transceiver is used to transmit and receive signals, and the processor executes program instructions to complete any of the first to fourth aspects described above.
  • the communication device may further include one or more memories, which are used for coupling with the processor, and store the necessary computer programs for realizing the functions of the SMF network element according to any one of the first to fourth aspects. Instructions and / or data.
  • the processor may execute computer program instructions stored in the memory to complete any one of the first to fourth aspects described above and a method performed by an SMF network element in any possible implementation manner of this aspect.
  • the present application provides a fourth communication device, the communication device having a function of realizing the PCF network element involved in the fourth aspect, for example, the communication device includes the PCF network element to execute the above-mentioned fourth aspect.
  • the module or unit or means corresponding to the steps, and the function or module or unit or means can be implemented by software, or by hardware, or by executing corresponding software by hardware.
  • the communication device may include a processing module and a transceiver module.
  • the processing module and the transceiver module may perform corresponding functions related to the PCF network element in the fourth aspect and the method provided by any one of the possible implementation manners of the fourth aspect.
  • the communication device may include a processor, and may further include a transceiver.
  • the transceiver is used to transmit and receive signals.
  • the processor executes program instructions to complete the fourth aspect and the fourth aspect. The method performed by the PCF network element in any possible implementation of the aspect.
  • the communication device may further include one or more memories, which are used for coupling with the processor, and store the necessary computer program instructions and / or data for realizing the functions of the PCF network element according to the fourth aspect.
  • the processor may execute computer program instructions stored in the memory to complete the fourth aspect and the method performed by the PCF network element in any possible implementation manner of the fourth aspect.
  • the present application provides a communication system including a first communication device according to the fifth aspect, a second communication device according to the sixth aspect, a third communication device according to the seventh aspect, And the fourth communication device according to the eighth aspect.
  • the present application provides a chip that can be connected to a memory, and is used to read and execute a software program stored in the memory to implement the methods described in the above aspects.
  • the present application provides a computer storage medium storing computer-readable instructions.
  • the computer reads and executes the computer-readable instructions, the computer causes the computer to execute the methods described in the foregoing aspects. .
  • the present application also provides a computer program product containing a software program, which when executed on a computer, causes the computer to execute the methods described in the above aspects.
  • FIG. 1 is a network architecture diagram of a 5G communication system provided by this application.
  • FIG. 2 is a QoS flow-based QoS model provided by the present application
  • FIG. 3 is a schematic flowchart of establishing a QoS flow provided by this application.
  • FIG. 5 is a schematic diagram of an interaction process between a first RAN device and a second RAN device in a scenario provided by Embodiment 1 of the present application;
  • FIG. 6 is a schematic diagram of an interaction process between a first RAN device and a second RAN device in scenario 2 provided in Embodiment 1 of the present application;
  • FIG. 7 is a schematic flowchart of a communication method provided in Embodiment 2 of the present application.
  • FIG. 8 is a schematic flowchart of a notification control state of a second RAN device notifying a core network device of at least one QoS flow in Embodiment 2 of the present application;
  • Embodiment 9 is a schematic flowchart of a communication method provided in Embodiment 3 of the present application.
  • FIG. 10 is a schematic flowchart of a communication method provided in Embodiment 4 of the present application.
  • 11 to 18 are schematic structural diagrams of a communication device according to an embodiment of the present application.
  • FIG. 1 exemplarily illustrates a network architecture diagram of a 5G communication system. among them:
  • Terminal devices can include handheld devices with wireless communication capabilities, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE) and mobile stations (mobile station, MS), terminal equipment, etc.
  • UE user equipment
  • MS mobile stations
  • the RAN device may include a base station, for example, an access node (AP), a next generation node B (gNB), a next generation eNodeB (gNB), and a transceiver in a 5G system.
  • Point transmission point, TRP
  • TP transmission point
  • RAN devices are collectively referred to as RAN devices for ease of description.
  • User plane function (UPF) network element As a user plane function network element, it can connect to external data networks.
  • the main functions include: packet routing and transmission, packet inspection, service usage reporting, QoS processing, legal monitoring, User plane related functions such as uplink packet detection and downlink data packet storage.
  • AMF network element its main functions include: connection management, mobility management, registration management, access authentication and authorization, reachability management, security context management and other access and mobility-related functions.
  • SMF network element its main functions include: session management (such as session establishment, modification and release, including tunnel maintenance between UPF and RAN), selection and control of UPF, service and session continuity (SSC) Mode selection, roaming and other session related functions.
  • session management such as session establishment, modification and release, including tunnel maintenance between UPF and RAN
  • SSC service and session continuity
  • PCF network elements whose main functions include policy-related functions such as unified policy formulation, provision of policy control, and acquisition of contract information related to policy decisions.
  • Application function (AF) network elements can be either a third-party application control platform or a device deployed by an operator. Its main functions include providing application-related information and providing services for multiple application servers.
  • DN Data network
  • main function is to provide specific data services, such as operator services, Internet access or third-party services.
  • the above content mainly describes the network elements or devices that may be involved in this application.
  • the network architecture shown in FIG. 1 is only an exemplary description, and does not limit the network architecture of the communication system applicable to this application.
  • the communication system to which this application is applicable may also include other network elements or devices, and this application does not list them one by one.
  • the connection form between the network elements or devices in the communication system applicable to the present application may be a reference point-based form shown in FIG. 1 or a service-based interface form.
  • the communication systems applicable to this application can also be divided into non-roaming scenarios and roaming scenarios. Among them, the roaming scenario can be further divided into a local breakout scenario and a home routed scenario.
  • the network architectures of the communication systems in these communication scenarios may be different, but they are all applicable to the embodiments of the present application.
  • a terminal device can establish at least one PDU session between the RAN device and the UPF on the core network side. For each PDU session, the terminal device, the RAN device, and the UPF network element can be established. At least one QoS flow.
  • FIG. 3 exemplarily illustrates a flowchart of establishing a QoS flow. The interaction flow between each network element or device includes:
  • Step 301 The SMF network element instructs the terminal device, the RAN device, and the UPF network element to establish a QoS flow according to a local policy or a policy and charging control (PCC) rule sent by the PCF network element.
  • the specific establishment process is divided into three stages: Step 301A, the SMF network element sends service data flow (SDF) information to the UPF network element, which includes QoS control information; step 301B, the SMF network element sends the AMF network element to the AMF network element.
  • the (R) AN device sends a QoS profile for QoS flow.
  • the SMF network element sends a QoS rule to the terminal device through the AMF network element and / or the (R) AN device, which contains QoS control information.
  • the content contained in the QoS configuration file and the QoS control information are basically the same, and both are generated by the SMF according to a local policy or a PCC rule.
  • Step 302 A QoS flow is established between the terminal device, the RAN device, and the UPF network element.
  • the (R) AN device can establish the DRB of the air interface according to the QoS configuration file, and store the binding relationship between the QoS flow and the DBR.
  • the QoS control is performed according to the SDF information sent by the SMF network element. It carries a Quality of Service Flow Identifier (QFI) used to identify the QoS flow.
  • QFI Quality of Service Flow Identifier
  • the RAN device When the RAN device receives the downlink data packet, it can analyze the QFI in the packet header to confirm the available QoS flow, and according to the stored QoS flow and DRB. Binding relationship, the downlink data packet is transmitted on the corresponding DRB.
  • the RAN device In the upstream direction, when a terminal device needs to send an uplink data packet, it can determine the QoS flow according to the QoS rule, and carry the QFI in the header of the uplink data packet, and then place the uplink data packet according to the binding relationship between QoS flow and DBR.
  • the header of the uplink data packet forwarded to the UPF network element carries the QFI according to the QFI in the packet header, and the UPF network element receives the uplink data packet sent by the RAN device.
  • the upstream packet is transmitted using the correct QoS flow.
  • the established QoS flow can include two types:
  • the first type is: guaranteed bit rate (GBR) QoS flow.
  • the QoS configuration file may include 5G QoS identifier (5G), identification and reservation priority (ARP), and guaranteed flow bit rate (guaranteed) used to identify QoS attribute information. flow bit rate (GFBR), and maximum bit rate (MBR).
  • the QoS configuration file may also include notification control information.
  • GBR QoS flow is the GBR QoS flow that requires notification control, otherwise it is not required to perform notification control GBR QoS flow.
  • the RAN device When transmitting a packet on the DRB corresponding to a certain GBR QoS flow, if the RAN device detects that the quality of service requirements of the GBR QoS flow cannot be met, and the GBR QoS flow is configured to require notification control, then the RAN device The AMF network element can be notified to the SMF network element that the service quality requirements of the GBR QoS flow cannot be met, so that the SMF network element modifies or deletes the GBR QoS flow according to local policies, or the SMF network element instructs the PCF network element to modify or delete the GBR QoS flow.
  • the bit rate of the transmitted data packet does not reach the expected bit rate specified by the GFBR, it can be considered that the service quality requirements of the GBR QoS flow cannot be met.
  • the transmission delay (or packet loss rate, etc.) of a data packet does not meet the transmission delay (or packet loss rate, etc.) included in 5QI, the quality of service requirements of the GBR QoS flow can also be considered Cannot be satisfied.
  • Type two is: non-guaranteed bit rate (non-GBR) QoS flow.
  • non-GBR non-guaranteed bit rate
  • 5QI, ARP, etc. may be included in the QoS configuration file.
  • the problem may occur that the notification control status recorded on the RAN side and the notification control status recorded on the core network side are not synchronized, making it easier for the core network side to QoS flow makes wrong policy decisions.
  • the QoS flow corresponding to PDU sessions can also be performed between RAN devices.
  • the DRB established by the source RAN device before the handover may be different from the DRB established by the target RAN device after the handover, before the handover is performed, the DRB established by the source RAN device corresponding to the QoS flow is used to transmit the quality of service requirements. It cannot be met, but after the handover, it is likely that the quality of service requirements can be met again when using the QoS flow corresponding to the DRB established by the target RAN device to transmit data packets.
  • the SMF network element and the PCF network element do not perceive the QoS flow switching between the RAN devices, the QoS flow notification control status recorded by the SMF network element and the PCF network element is likely to be the source RAN device before the switch
  • the SMF network element or PCF network element may make a wrong policy decision when re-making a policy decision on the QoS flow that the quality of service requirements notified by the source RAN device cannot be met. For example, if the quality of service requirements of the QoS flow in the target RAN device after the handover can be met, delete the QoS flow or reduce the quality of service requirements of the QoS flow.
  • the embodiments of the present application propose a communication method and device.
  • the notification control state of the QoS flow after the switch is fed back to the core network side in time so that The notification control state of the QoS flow maintained in the core network side and the RAN device after the handover can be kept as synchronized as possible.
  • the scenario in which QoS flow is switched between RAN devices in the embodiments of the present application is not limited to the scenario where a terminal device switches between RAN devices, but also other scenarios where QoS flow switching between RAN devices may occur.
  • the QoS flow switching between the RAN devices may also occur.
  • the QoS flow may also be switched from the master RAN device to the slave RAN device, or from the slave RAN device to the master RAN. device.
  • the communication method provided in the present application is described in detail below with reference to specific embodiments. Among them, it should be understood that the terms “first" and “second” mentioned below are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance, nor as indicating or implying order. Wait.
  • the source RAN corresponding to the QoS flow switch is referred to as the first RAN device
  • the target RAN device corresponding to the QoS flow switch is referred to as the second RAN device.
  • FIG. 4 is a schematic flowchart of a communication method provided in Embodiment 1 of the present application.
  • the method includes:
  • Step 401 During the process of switching at least one QoS flow from the first RAN device to the second RAN device, the first RAN device sends first information to the second RAN device, and the first information is used to indicate that the first RAN device has notified the core.
  • the quality of service requirements of at least one QoS flow of network equipment cannot be met.
  • the first RAN device has notified the core network device that the quality of service requirements of at least one QoS flow cannot be met. It can be understood that the first RAN device recently notified the core network device of the at least one QoS flow.
  • the notification control state is a state where the quality of service requirements cannot be met.
  • the notification control state is divided into a first state and a second state, where the first state is used to indicate that the quality of service requirements of QoS flow cannot be met, and the second state is used to indicate the quality of service requirements of QoS flow Can be satisfied.
  • At least one QoS flow is a QoS flow that requires notification control. It should be understood that the QoS flow that needs to be notified in this application is not limited to the GBR QoS flow, but may also be any other QoS flow that needs to be notified to the core network equipment if the quality of service requirements are not met.
  • the first RAN device may include in the first information sent to the second RAN device
  • the first RAN device may carry the identifier of the at least one QoS flow and the notification control status of the at least one QoS flow in the first information sent to the second RAN device, and the notification control status is the first status. .
  • the first RAN device can detect whether the quality of service requirements of the established QoS flow can be met.
  • the at least one QoS flow cannot be met, and the at least one QoS flow needs notification control.
  • the first RAN device may notify the core network device that the notification control status of the at least one QoS flow is the first state.
  • the first RAN device may also notify the core network again.
  • the at least one QoS flow of the device is in a second state. Based on this, the first RAN device may locally record the notification control status of the QoS flow notified to the core network device, for example, it may record a sending condition table of a quality of service notification control (QoS notification control, QNC).
  • QoS notification control QoS notification control
  • the QNC sending situation table may record the QoS flow identifier and the notification control status corresponding to the latest QoS flow notified to the core network device.
  • the QoS flow identifier is, for example, QFI
  • the notification control status is divided into a first status and a second status.
  • Table 1 exemplarily lists a sending table of QNC:
  • the QoS flow recorded by the first RAN device is identified by # 1 ⁇ # n.
  • the corresponding notification control status is "1”
  • it is characterized as the first status that is, the quality of service requirements of the QoS flow cannot be met.
  • the corresponding notification control state is "0”
  • it is characterized as the second state that is, the service quality requirements of QoS flow can be satisfied.
  • each time the first RAN device notifies the core network device of the notification control status of the QoS flow it may correspondingly update the QNC transmission status table of the local record. For example, for QoS flow # 1, the notification control status currently recorded in Table 1 is "1".
  • the first RAN device When the first RAN device detects that at least one QoS flow needs to be switched from the first RAN device to the second RAN device, it may notify the second RAN device of the content of the latest QNC transmission situation table recorded, or it may also The second RAN device is notified of the content of the QoS flow whose control status is "1" in the recorded latest QNC transmission situation table.
  • the QNC transmission status table may record only the identifier of at least one QoS flow whose notification control status is the first state recently notified to the core network device, that is, the service that was last notified to the core network device. Identification of at least one QoS flow whose quality requirements cannot be met.
  • Table 2 exemplarily lists a QNC sending situation table:
  • At least one QoS flow recorded by the first RAN device is identified by # 1 to #n.
  • each time the first RAN device notifies the core network device of the notification control status of the QoS flow it may update the recorded transmission status table of the QNC.
  • QoS flow # 1 is currently recorded in Table 2, which indicates that the quality of service requirements of QoS flow # 1 cannot be met. If the quality of service requirements of QoS flow # 1 can be detected again later, When it is satisfied, the first RAN device can notify the core network device that the quality of service requirement of QoS flow # 1 can be met again. Accordingly, the QoS flow # 1 recorded in Table 2 can be deleted. Similarly, if it is later detected that the quality of service requirements of other QoS flows other than the QoS flows recorded in Table 2 cannot be satisfied, and the core network equipment is notified, other QoS flow identifiers may be added in Table 2.
  • the first RAN device When the first RAN device detects that at least one QoS flow needs to be switched from the first RAN device to the second RAN device, it may notify the second RAN device of the content of the latest QNC transmission situation table recorded.
  • the above examples are merely exemplary illustrations, and in the embodiment of the present application, the form in which the first RAN device sends the first information to the second RAN device is not limited to this.
  • Step 402 After receiving the first information sent by the first RAN device, the second RAN device sends the second information to the core network device, where the second information is used to notify the core network device of the first QoS in the at least one QoS flow.
  • the service quality requirements of flow can be met, where the first QoS flow is all the QoS flows that have been successfully switched from the first RAN device to the second RAN device and need to be notified. .
  • the second RAN device may first determine from at least one QoS flow that the QoS that has been successfully switched from the first RAN device to the second RAN device, that is, the first QoS. flow, and the quality of service requirements of the first QoS flow that can be successfully switched over by default can be met.
  • Scenario 1 There is a directly connected Xn interface between the first RAN device and the second RAN device.
  • the handover process may be a handover based on the Xn interface.
  • Step 501 The first RAN device directly sends a handover request (handover request) to the second RAN device, where the handover request carries the identifier of the at least one QoS flow that the first RAN device notified to the core network device recently, and
  • the at least one notification control state of the QoS flow, the notification control state is a first state, that is, the quality of service requirement of the QoS flow cannot be met.
  • Step 502 The second RAN device sends a handover request confirmation response (handover request acknowledgement) to the first RAN device.
  • Scenario 2 There is no directly connected Xn interface between the first RAN device and the second RAN device, and the core network device participates in the handover process, for example, it may be a handover based on the N2 interface.
  • Step 601 The first RAN device sends a handover request (handover required) to a first AMF network element serving the first RAN device.
  • the handover required includes the first notification from the first RAN device to the core network device.
  • the notification control status is the first state, which means that the quality of service requirements of the QoS flow cannot be met.
  • the identification of the at least one QoS flow and the notification control status of the at least one QoS flow may be contained in a source-to-target transparent container (source-to-target transparent container), where the container contains the first
  • source-to-target transparent container the container contains the first
  • the AMF network element only plays a role of forwarding, and does not sense the content therein.
  • Step 602 The first AMF network element selects a second AMF network element that provides services to the second RAN device.
  • Step 603 The first AMF network element sends a UE context creation request (namf_communication_createUEcontextrequest) to the second AMF network element, which carries an identifier of the at least one QoS flow and a notification control status of the at least one QoS flow.
  • Step 604 A session management context update process of a PDU session is performed between the second AMF network element and the SMF network element, so as to perform a session establishment process based on the N4 interface.
  • Step 605 The second AMF network element sends a handover request (handover request) to the second RAN device, where the handover request carries the identifier of the at least one QoS flow that the first RAN device notified to the core network device last time, and the Notification control status for at least one QoS flow.
  • handover request carries the identifier of the at least one QoS flow that the first RAN device notified to the core network device last time, and the Notification control status for at least one QoS flow.
  • Step 606 The second RAN device sends a handover request confirmation response (handover request acknowledgement) to the second AMF network element.
  • Step 607 A session management context update process of a PDU session is performed between the second AMF network element and the SMF network element, so as to perform a session modification process based on the N4 interface.
  • Step 608 The second AMF network element sends a UE context creation response (namf_communication_createUEcontext response) to the first AMF network element.
  • the second RAN device detects at least one When the first QoS flow in the QoS flow is successfully switched from the first RAN device to the second RAN device, in order to timely inform the core network device of the latest notification control status of the successfully switched first QoS flow, in the embodiment of the present application, the The two RAN devices directly notify the core network device that the quality of service requirements of the first QoS flow that can be successfully switched can be met.
  • the first RAN device or the second RAN device can notify the core network device of the notification control status of the QoS flow in the following two ways:
  • the first RAN device or the second RAN device can notify the SMF network element of the notification control status of the QoS flow through the AMF network element.
  • the SMF network element learns the notification control status of the QoS flow, it can Local policy to execute the process of modifying the session management policy, to modify or delete the QoS flow.
  • the first RAN device or the second RAN device may notify the SMF network element of the notification control status of the QoS flow through the AMF network element, and the SMF network element may further indicate the notification control status of the QoS flow of the PCF network element so that The SMF network element and the PCF network element execute the process of modifying the session management policy based on the dynamic PCC rules to implement the modification or deletion of the QoS flow.
  • the SMF network element receives the information that the quality of service requirements of the first QoS flow among at least one QoS flow sent by the second RAN device can be satisfied, that is, the second information, the SMF network element The PCF network element can be notified that the quality of service requirements of the first QoS flow can be met.
  • the second RAN device after the second RAN device notifies the core network device that the quality of service requirements of the first QoS flow in the at least one QoS flow can be met, in an implementation manner, if the second RAN device subsequently detects the first QoS flow, third information may be immediately sent to the core network device, and the third information is used to notify the core network device that the quality of service requirements of the first QoS flow cannot be met.
  • the above implementation method proposed in this application can reduce the delay, so that the core network device can timely detect the QoS flow of the core network side. Latest notification control status.
  • the notification control state of the at least one QoS flow can also be transferred from the first RAN device to the second RAN synchronously.
  • the second RAN device can accurately know the notification control status of at least one QoS flow that the first RAN device has notified to the core network device, which is equivalent to knowing the notification control status of the QoS flow recorded by the current core network device .
  • the second RAN device can notify the core network device of the notification control status of the QoS flow after the switch, so that the notification control status of the QoS flow that is perceived by the core network side and the QoS flow recorded by the access network side after the switch are Notification control status is synchronized, which can avoid making wrong policy decisions.
  • FIG. 7 is a schematic flowchart of a communication method provided in Embodiment 2 of the present application.
  • the method includes:
  • Step 701 When at least one QoS flow is switched from the first RAN device to the second RAN device, the second RAN device sends fourth information to the core network device, where the fourth information is used to notify the core network device of the at least one QoS. Flow's quality of service needs can be met.
  • At least one QoS flow described in the second embodiment of the present application can be understood as all QoS flows that have been successfully switched from the first RAN device to the second RAN device and need to be notified.
  • the second RAN device may send the fourth information to the AMF network element, and then the AMF network element forwards the fourth information to the SMF network element, so as to notify the SMF network element that the quality of service requirements of the at least one QoS flow can be met. . Further, after receiving the fourth information sent by the second RAN device, the SMF network element may further send fifth information to the PCF network element, and the fifth information is used to notify the PCF network element that the quality of service requirements of the at least one QoS flow can be satisfied.
  • the SMF network element may update the recorded notification control status of the at least one QoS flow.
  • the notification control state is divided into a first state and a second state.
  • the first state is used to indicate that the quality of service requirements of at least one QoS flow cannot be met, and the second state is used to indicate that the quality of service requirements of at least one QoS flow can be satisfied. Satisfy.
  • the SMF network element may also confirm whether to notify the PCF network element of the notification control status of at least one updated QoS flow according to the specific situation.
  • the SMF network element may determine whether it is from the first RAN after receiving the fourth information.
  • the device receives the information that the at least one QoS flow notification control state is the first state: if the determination result is no, it means that the core network side did not receive the quality of service requirement of the at least one QoS flow before the switchover. Satisfied notification.
  • the SMF network element does not need to repeatedly notify the PCF network element that at least one QoS flow notification control state is the second state.
  • the SMF network element may determine the most recent reception After the notification control state of the at least one QoS flow notified by the first RAN device is the first state, sending the fifth letter to the PCF network element , PCF to inform the network element notifies the at least one QoS flow control state to a second state.
  • the following describes the process in which the second RAN device notifies the core network device of the notification control status of at least one QoS flow in the second embodiment with reference to specific scenarios, as shown in FIG. 8:
  • the terminal device passes the PDU session between the first RAN device and the first UPF network element serving the first RAN device, and has been switched to the terminal device passes the second RAN device and the second UPF network element serving the second RAN device. PDU sessions between them, and at least one QoS flow is also switched from an end-to-end path composed of terminal equipment, first RAN equipment, and first UPF to an end-to-end composed of terminal equipment, second RAN equipment, and second UPF End of the path.
  • Step 801 The second RAN device sends an N2 message to the AMF network element.
  • the N2 message includes an identifier of the PDU session and N2 session management (SM) information.
  • the N2SM message includes the QFI of the at least one QoS flow and the notification control status of the at least one QoS flow, that is, the second status.
  • the N2SM message may further include QFIs of other QoS flows whose quality of service requirements cannot be met and need to be notified, and notification control status of the other QoS flows, and the notification control status of the other QoS flows is the first. A state.
  • Step 802 The AMF network element sends a PDU session session management context update request (nsmf_PDUsession_updateSMcontextrequest) to the SMF network element.
  • the request may include the QFI of the at least one QoS flow and the notification control status of the at least one QoS flow.
  • the notification control state of the at least one QoS flow is a second state.
  • the request may further include the QFI of the other QoS flow and the notification control status of the other QoS flow, and the notification control status of the other QoS flow is the first state.
  • Step 803 After the SMF network element receives the request, the SMF network element determines whether it needs to notify the PCF network element of the QoS flow whose notification control status is the second state reported by the second RAN device.
  • the SMF network element may initiate a session management policy modification process according to the existing flow, so as to implement deletion or modification of the QoS flow.
  • the second RAN device may send the notification control status of at least one QoS that needs to be notified from the first RAN device to the core network device so that the core network device can timely and accurately Perceive the notification control status of QoS flow after handover, so that core network devices can be prevented from making wrong policy decisions.
  • FIG. 9 is a schematic flowchart of a communication method provided in Embodiment 3 of the present application.
  • the method includes:
  • Step 901 The SMF network element determines the notification control status of at least one QoS flow received by the first RAN device.
  • the at least one QoS flow described in the third embodiment of the present application can be understood as the corresponding QoS flow that needs to be notified in the PDU session of the terminal device before the handover.
  • the notification control state is divided into a first state and a second state.
  • the first state is used to indicate that the service quality requirements of QoS flow cannot be met
  • the second state is used to indicate that the service quality requirements of QoS flow can be met.
  • Step 902 When the second QoS flow in the at least one QoS flow has been switched from the first RAN device to the second RAN device, the SMF network element determines the first notification in the second QoS flow that the control state is the first state. Three QoS flows, and update the notification control state of the third QoS flow to the second state.
  • Step 903 The SMF network element sends sixth information to the PCF unit, where the sixth information is used to notify the PCF network element that the third QoS notification control state is the second state.
  • the SMF network element may receive seventh information sent by the AMF network element, and the seventh information may include an identifier of the second QoS flow that has been successfully switched from the first RAN device to the second RAN device, and may also The information includes the identifier of the PDU session that has been successfully switched by the first RAN device to the second RAN device, so that the SMF network element determines the successfully switched PDU session and the second QoS flow information.
  • the first RAN device or the second RAN device may successfully switch the PDU session, And the second QoS flow is notified to the AMF network element, and then the AMF network element is notified to the SMF network element.
  • the AMF network element can sense the successfully switched PDU session and the second QoS flow during the switching process. , And then can successfully switch the PDU session and the second QoS flow directly through the SMF network element.
  • the SMF network element may first determine whether the notification control status of the second QoS flow in the notification control status of the at least one QoS flow that was recently received from the first RAN device is First state. For the third QoS flow in the second QoS flow that is notified that the control state is the first state, it can be defaulted that the quality of service requirements of the third QoS flow can be met again, and the PCF network element can be notified of the quality of service of the third QoS flow Needs can be met again.
  • the SMF network element may not need to repeatedly notify the PCF network element Notification control status of the fourth QoS flow.
  • the SMF network element may notify the PCF network element according to the existing flow, so that the PCF network element re-strategizes these QoS flows decision making.
  • the SMF network element may notify the PCF network element of the notification control status of the QoS flow in the process of initiating a session management policy association modification (SM, policy, association, and modification) process.
  • the PCF network element is configured with a policy control request trigger (policy control request trigger).
  • policy control request trigger policy control request trigger
  • the PCF network element can recognize the notification sent by the SMF network element, which contains information that the quality of service requirements of the third QoS flow can be met, and then The PCF network element may make a policy decision according to the notification sent by the SMF network element, and send the result of the policy decision to the SMF network element.
  • the SMF network element can default to the previously recorded QoS requirements that cannot be met, and the service quality requirements of the QoS flow can be satisfied again, and then notify the PCF network element to enable the PCF network.
  • the unit can sense the status of the QoS flow after a successful handover in time, thereby avoiding making wrong decisions.
  • FIG. 10 is a schematic flowchart of a communication method provided in Embodiment 4 of the present application. The method includes:
  • Step 1001 The SMF network element determines that at least one QoS flow has been switched from the first RAN device to the second RAN device.
  • the at least one QoS flow can be understood as a QoS flow that has been successfully switched from the first RAN device to the second RAN device.
  • the SMF network element may determine that at least one QoS flow is successfully switched successfully under the notification of the AMF network element. For details, refer to the related description in the third embodiment.
  • Step 1002 The SMF network element sends eighth information to the PCF network element, where the eighth information is used to indicate that at least one QoS flow has been switched from the first RAN device to the second RAN device.
  • the SMF network element may notify the PCF network element that at least one QoS flow has been successfully switched in the process of initiating a session management policy association modification (SM, policy association modification) process. Further, the PCF network element updates the notification control status of at least one QoS flow recorded.
  • the notification control state is divided into a first state and a second state. The first state is used to indicate that the service quality requirements of QoS flow cannot be met, and the second state is used to indicate that the service quality requirements of QoS flow can be met.
  • Step 1003 After receiving the eighth information, the PCF network element determines the QoS flow whose notification control status is the first status in the at least one QoS flow, and updates the determined notification control status of the QoS flow to the second status. .
  • the PCF network element may be configured with a handover indication trigger (handover indication trigger). After receiving the eighth information sent by the SMF network element notifying that at least one QoS flow has been successfully switched, it may be triggered to perform an update of the QoS flow. Actions to notify control status. Furthermore, the PCF network element can make a policy decision according to the latest updated QoS flow notification control status, and send the result of the policy decision to the SMF network element.
  • handover indication trigger handover indication trigger
  • the SMF network element may notify the PCF network element that at least one QoS flow switching is successful after determining that at least one QoS flow switching is successful, and then the PCF network element updates at least one QoS flow notification control state, so that the PCF The network element can sense the status of the QoS flow after a successful handover in time to avoid making wrong decisions as much as possible.
  • the embodiment of the present application provides a communication device, which is provided with the function of implementing the first RAN device in the first method embodiment.
  • the communication device includes the first RAN device to execute the first method of the method.
  • the module or unit or means corresponding to the steps, and the function or module or unit or means can be implemented by software, or by hardware, or by executing corresponding software by hardware.
  • FIG. 11 is a schematic structural diagram of a communication device 1100 according to an embodiment of the present application.
  • the device 1100 includes a processor 1101 and a transceiver 1102.
  • the processor 1101 is configured to support a first RAN device to perform the functions involved in the first method embodiment.
  • the transceiver 1102 is configured to support a function of receiving and sending messages by the first RAN device.
  • the apparatus 1100 may further include a memory 1103.
  • the processor 1101 and the transceiver 1102 are connected to the memory 1103.
  • the memory 1103 is configured to store a computer program necessary to implement the functions of the first RAN device involved in the first method embodiment.
  • the processor 1101 is configured to execute computer program instructions stored in the memory 1103 to control the transceiver 1102 to send and receive signals, and complete the steps of the first RAN device performing corresponding functions in the first method embodiment.
  • the processor 1101 is configured to use the transceiver 1102 to send to the second access network device during a process in which at least one quality of service flow is switched from the communication device 1100 to a second access network device.
  • Sending first information the first information is used to indicate that the communication device 1100 has notified a core network device that a quality of service requirement of the at least one quality of service flow cannot be met.
  • the first information may include an identifier of the at least one quality of service flow and a notification control status of the at least one quality of service flow, and the notification control status is a first status.
  • the first state is used to indicate that a quality of service requirement of the at least one quality of service flow cannot be met.
  • the processor 1101 is specifically configured to: use the transceiver 1102 to send the first access network device to the second access network device through an interface connected to the second access network device. A message; or, using the transceiver 1102 to send the first message to the second access network device through an AMF network element.
  • FIG. 12 shows a schematic structural diagram of a communication device 1200 according to an embodiment of the present application.
  • the device 1200 includes a processing module 1201 and a transceiver module 1202.
  • the processing module 1201 corresponds to the processor 1101 described in the communication device 1100
  • the transceiver module 1202 corresponds to the transceiver 1102 described in the communication device 1100.
  • Each of the processing modules 1201 can be used to implement the first method involved in the first method embodiment.
  • the specific implementation process can refer to the first embodiment of the above method and the related description in the above communication device 1100, which will not be repeated here.
  • This embodiment of the present application provides another communication device, where the communication device has a function of implementing the second RAN device involved in the first or second method embodiment.
  • the communication device includes the second RAN device to execute the foregoing.
  • the first or second method embodiments involve the modules or units or means corresponding to the steps.
  • the functions or modules or units or means (means) can be implemented by software, or by hardware.
  • FIG. 13 shows a schematic structural diagram of a communication device 1300 according to an embodiment of the present application.
  • the device 1300 includes a processor 1301 and a transceiver 1302.
  • the processor 1301 is configured to support a second RAN device to perform the functions involved in the first or second method embodiment.
  • the transceiver 1302 is configured to support a function of sending and receiving messages by the second RAN device.
  • the apparatus 1300 may further include a memory 1303, where the processor 1301, the transceiver 1302, and the memory 1303 are connected, and the memory 1303 is configured to store necessary functions for implementing functions of the second RAN device involved in the first or second method embodiment.
  • Computer program instructions The processor 1301 is configured to execute the computer program instructions stored in the memory 1303 to control the transceiver 1302 to send and receive signals, and to complete the steps of the second RAN device in the first or second method to perform corresponding functions.
  • the processor 1301 is configured to use the transceiver 1302 to receive first information sent by the first access network device, where the first information is used to indicate the first connection The network access device has notified the core network device that the quality of service requirements of at least one quality of service flow cannot be met.
  • the processor 1301 is further configured to use the transceiver 1302 to send second information to the core network device, where the second information is used to notify the core network device of a first service in the at least one quality of service flow The quality of service requirement of the quality flow can be satisfied, wherein the first quality of service flow is a quality of service flow that has been switched from the first access network device to the communication device 1300.
  • the processor 1301 is further configured to use the transceiver 1302 to send third information to the core network device when it is detected that the quality of service requirement of the first quality of service flow cannot be met, and the first The three pieces of information are used to notify the core network device that the quality of service of the first quality of service flow cannot be satisfied.
  • the processor 1301 when at least one quality of service flow has been switched from the first access network device to the communication device 1300, the processor 1301 is configured to use the transceiver 1302 to send to the core network device Fourth information, the fourth information is used to notify the core network device that a quality of service requirement of the at least one quality of service flow can be satisfied.
  • the at least one quality of service flow is all quality of service flows that have been switched from the first access network device to the communication device 1300 and need to be notified and controlled.
  • FIG. 14 shows a schematic structural diagram of a communication device 1400 according to an embodiment of the present application.
  • the device 1400 includes a processing module 1401 and a transceiver module 1402.
  • the processing module 1401 corresponds to the processor 1301 described in the above-mentioned communication device 1300
  • the transceiver module 1402 corresponds to the transceiver 1302 described in the above-mentioned communication device 1300, and can be used to implement the first method embodiment or the method embodiment, respectively.
  • the specific implementation process can refer to the first method embodiment or the second method embodiment and the related description in the above communication device 1300, which will not be repeated here.
  • the embodiment of the present application provides another communication device, and the communication device has a function of implementing the SMF network element involved in any one of the method embodiments 1 to 4, for example, the communication device includes the SMF network element
  • the communication device includes the SMF network element
  • the module or unit or means corresponding to the steps in any one of the method embodiments 1 to 4 above is performed.
  • the function or module or unit or means may be implemented by software or hardware. , Can also be implemented by hardware to execute the corresponding software.
  • FIG. 15 shows a schematic structural diagram of a communication device 1500 according to an embodiment of the present application.
  • the device 1500 includes a processor 1501 and a transceiver 1502.
  • the processor 1501 is configured to support an SMF network element to perform the functions involved in any one of the method embodiments 1 to 4 above.
  • the transceiver 1502 is configured to support a function of sending and receiving messages by an SMF network element.
  • the device 1500 may further include a memory 1503, where the processor 1501, the transceiver 1502, and the memory 1503 are connected, and the memory 1503 is configured to store an SMF network element involved in any one of the method embodiments 1 to 4 described above.
  • the computer program instructions necessary for the function.
  • the processor 1501 is configured to execute the computer program instructions stored in the memory 1503 to control the transceiver 1502 to transmit and receive signals, and to complete the execution of the SMF network element in any one of the method embodiments 1 to 4 above. Steps for the corresponding function.
  • the processor 1501 may be configured to use the transceiver 1502 to receive a notification control state of at least one quality of service flow sent by a second access network device, where the at least one quality of service flow is already Switching from the first access network device to the quality of service flow of the second access network device, the notification control state is a second state, and the second state is used to indicate the quality of service of the at least one quality of service flow Needs can be met.
  • the processor 1501 may be further configured to use the transceiver 1502 to send fifth information to a PCF network element, where the fifth information is used to notify the PCF network element that a quality of service requirement of the at least one quality of service flow can be determined. Satisfy.
  • the processor 1501 may be further configured to determine, by the processor 1501, the received first access network before sending the fifth information to the PCF network element by using the transceiver 1502.
  • the notification control state of the at least one quality of service flow sent by the device is a first state, and the first state is used to indicate that the quality of service requirements of the at least one quality of service flow cannot be met.
  • the processor 1501 may be configured to determine a notification control status of at least one quality of service flow sent by the first access network device. Further, the processor 1501 may be further configured to determine that the second quality of service flow in the at least one quality of service flow has been switched from the first access network device to the second access network device. The third quality of service flow in the second quality of service flow notifying that the control state is the first state. Further, the processor 1501 may be further configured to update the notification control state of the third quality of service flow to a second state, and use the transceiver 1502 to send sixth information to a PCF network element, where the first Six pieces of information are used to notify the PCF network element that the notification control state of the third quality of service flow is a second state.
  • the first state is used to indicate that the service quality requirements of the at least one quality of service flow cannot be met
  • the second state is used to indicate that the service quality requirements of the at least one quality of service flow can be met.
  • the processor 1501 may be further configured to use the transceiver 1502 to receive seventh information sent by an AMF network element, where the seventh information includes that the first access network device has been switched to the seventh information.
  • the identifier of the second quality of service flow of the second access network device may be further configured to use the transceiver 1502 to receive seventh information sent by an AMF network element, where the seventh information includes that the first access network device has been switched to the seventh information.
  • the processor 1501 may be used to determine at least one QoS flow switching from the first access network device to the second access network device, and further, the processor 1501 may be further configured to use a transceiver 1502 sends eighth information to a PCF network element, where the eighth information is used to instruct the at least one QoS flow to be switched from the first access network device to the second access network device.
  • FIG. 16 shows a schematic structural diagram of a communication device 1600 provided in an embodiment of the present application.
  • the device 1600 includes a processing module 1601 and a transceiver module 1602.
  • the processing module 1601 corresponds to the processor 1501 described in the above-mentioned communication device 1500
  • the transceiver module 1602 corresponds to the transceiver 1502 described in the above-mentioned communication device 1500, which can be respectively used to implement any one of the above method embodiments 1-4.
  • Corresponding functions of the SMF network element involved in the method embodiment, and the specific implementation process may refer to any one of the method embodiments 1 to 4 and the related description in the communication device 1500, which will not be repeated here.
  • the embodiment of the present application provides another communication device, which has the function of implementing the PCF network element in the fourth embodiment of the method.
  • the communication device includes the PCF network element to perform the steps involved in the fourth embodiment of the method.
  • the corresponding module or unit or means (means), the function or module or unit or means (means) can be implemented by software, or by hardware, and can also be implemented by hardware executing corresponding software.
  • FIG. 17 shows a schematic structural diagram of a communication device 1700 according to an embodiment of the present application.
  • the device 1700 includes a processor 1701 and a transceiver 1702.
  • the processor 1701 is configured to support a PCF network element to perform the functions involved in the fourth method embodiment.
  • the transceiver 1702 is configured to support a function of sending and receiving messages by a PCF network element.
  • the device 1700 may further include a memory 1703, where a processor 1701, a transceiver 1702, and a memory 1703 are connected, and the memory 1703 is configured to store computer program instructions necessary to implement functions of the PCF network element involved in the fourth method embodiment.
  • the processor 1701 is configured to execute computer program instructions stored in the memory 1703 to control the transceiver 1702 to transmit and receive signals, and complete the steps of performing corresponding functions by the PCF network element in the fourth method embodiment.
  • the processor 1701 may be configured to use the transceiver 1702 to receive eighth information sent by an SMF network element, where the eighth information is used to indicate that the at least one QoS flow is transmitted by the first access network.
  • the device switches to the second access network device.
  • the processor 1701 may determine the QoS flow in which the notification control state is the first state in the at least one QoS flow, and update the determined notification control state of the QoS flow to the second state.
  • the first state is used to indicate that the determined service quality requirements of the QoS flow cannot be satisfied
  • the second state is used to indicate that the determined service quality requirements of the QoS flow can be satisfied.
  • FIG. 18 shows a schematic structural diagram of a communication device 1800 according to an embodiment of the present application.
  • the device 1800 includes a processing module 1801 and a transceiver module 1802.
  • the processing module 1801 corresponds to the processor 1701 described in the communication device 1700
  • the transceiver module 1802 corresponds to the transceiver 1702 described in the communication device 1700, which can be used to implement the PCF network involved in the fourth method embodiment.
  • the specific implementation process can refer to the fourth embodiment of the above method and the related description in the above communication device 1700, which will not be repeated here.
  • the communication device is not limited to the above structure.
  • the specific structure may further include an antenna array, a duplexer, and a baseband processing section.
  • processors in the embodiment of the present application may be a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), and an application-specific integrated circuit (application-specific integrated circuit (ASIC), field programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of this application.
  • a processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.
  • the memory may be integrated in the processor, or may be provided separately from the processor.
  • the embodiment of the present application further provides a communication system, which includes the above-mentioned first RAN device, second RAN device, SMF network element, and PCF network element.
  • An embodiment of the present application further provides a chip, which may be connected to a memory, for reading and executing a software program stored in the memory, so as to implement any one of the methods involved in the foregoing method embodiments.
  • An embodiment of the present application further provides a computer storage medium.
  • the computer storage medium stores computer-readable instructions.
  • the computer reads and executes the computer-readable instructions, any of the methods described in the foregoing method embodiments can be completed. Methods.
  • An embodiment of the present application further provides a computer program product including a software program, which when executed on a computer, causes the computer to execute any one of the methods involved in the foregoing method embodiments.
  • this application may be provided as a method, a system, or a computer program product. Therefore, this application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, this application may take the form of a computer program product implemented on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, etc.) containing computer instructions.

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Abstract

一种通信方法及装置，该方法中，在至少一个服务质量流由第一接入网设备切换至第二接入网设备的过程中，第一接入网设备向第二接入网设备发送第一信息，所述第一信息用于指示所述第一接入网设备已经通知核心网设备所述至少一个服务质量流的服务质量需求不能被满足。第二接入网设备接收到所述第一接入网设备发送的第一信息后，可以向核心网设备发送第二信息，所述第二信息用于通知核心网设备所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足，第一服务质量流为已经由所述第一接入网设备切换至所述第二接入网设备的服务质量流。由此可以尽可能使服务质量流切换后接入网侧与核心网侧记录的服务质量流的通知控制状态相同步。

Description

一种通信方法及装置
本申请要求于2018年5月21日提交中国国家知识产权局、申请号为201810491245.7、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
下一代通信系统中，终端设备可以通过接入网设备与核心网设备之间建立至少一个分组数据单元(packet data unit，PDU)会话，其中，针对每一个PDU会话，可以建立至少一个服务质量(quality of service，QoS)流(flow)，每个QoS flow配置了使用该QoS flow对应的数据无线承载(data radio bearer，DRB)传输数据包时的服务质量需求。当使用某一个QoS flow对应的DRB传输数据包时不能满足该QoS flow的服务质量需求时，接入网设备可以通知核心网设备该QoS flow对应的通知控制状态、且该通知控制状态用于指示该QoS flow的服务质量需求不能被满足，以便核心网设备对该QoS flow重新进行策略决策，其中，策略决策例如为对该QoS flow进行删除或修改等操作。
在一些通信场景下，如终端设备在接入网设备之间进行切换时，终端设备中已建立好的PDU会话可以在接入网设备之间进行切换，相应地，PDU会话对应的QoS flow也可以在接入网设备之间进行切换。但是，由于切换前的源接入网设备建立的DRB与切换后的目标接入网设备建立的DRB可能有所不同，故切换前后使用同一个QoS flow对应的不同DRB传输数据包时该QoS flow的通知控制状态也可能不相同。由于核心网设备感知不到QoS flow在接入网设备之间的切换，故核心网设备记录的QoS flow的通知控制状态很可能还是切换前源接入网设备通知的，导致切换后目标接入网设备记录的QoS flow的通知控制状态与核心网设备记录的QoS flow的通知控制状态可能出现不同步的问题，使得核心网设备容易对QoS flow做出错误的策略决策。
发明内容
本申请提供一种通信方法及装置，用以解决QoS flow在接入网侧切换时可能出现切换后接入网侧与核心网侧记录的QoS flow的通知控制状态不同步的问题。
第一方面，提供一种通信方法，该方法中，在至少一个QoS flow由第一接入网设备切换至第二接入网设备的过程中，所述第一接入网设备向所述第二接入网设备发送第一信息，所述第一信息用于指示所述第一接入网设备已经通知核心网设备所述至少一个QoS flow的服务质量需求不能被满足。所述第二接入网设备接收到所述第一接入网设备发送的第一信息后，可以向所述核心网设备发送第二信息，所述第二信息用于 通知所述核心网设备所述至少一个QoS flow中第一QoS flow的服务质量需求能够被满足，其中，所述第一QoS flow为已经由所述第一接入网设备切换至所述第二接入网设备的QoS flow。
进一步地，核心网设备中的会话管理功能(session management function，SMF)网元在接收到第二接入网设备发送的第一QoS flow的服务质量需求能够被满足的信息后，可以通知策略控制功能(policy control function，PCF)网元所述第一QoS flow的服务质量需求能够被满足。
上述方法中，在QoS flow发生切换过程中，第一接入网设备可以将已经通知给核心网设备的至少一个QoS flow的服务质量需求不能被满足的状态信息通知给第二接入网设备，在至少一个QoS flow中第一QoS flow成功切换到了第二接入网设备后，第二接入网设备可以默认成功切换的第一QoS flow的服务质量需求能够被满足，进而可以通知核心网设备成功切换的QoS flow的服务质量需求能够被满足，这样，可以使核心网侧感知到的QoS flow的通知控制状态与切换后接入网侧记录的QoS flow的通知控制状态相同步，可以避免核心网侧做出错误的策略决策。
在一种可能的实现方式中，所述第一信息中可以包括所述至少一个QoS flow的标识。或者，所述第一信息中可以包括所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态，所述通知控制状态为第一状态，所述第一状态用于指示所述至少一个QoS flow的服务质量需求不能够被满足。上述方式中，第一接入网设备通过向第二接入网设备发送所述第一信息，可以使得第二接入网设备可以获知核心网侧记录的至少一个QoS flow的情况，后续可以将切换后最新的QoS flow的通知控制状态通知给核心网侧，以保证两者记录的通知控制状态相同步。
在一种可能的实现方式中，所述第一接入网设备可以通过与所述第二接入网设备相连的接口向所述第二接入网设备发送所述第一信息。
当第一接入网设备和第二接入网设备之间没有相连的接口时，第一信息可以通过核心网侧进行转发。一种实现方式中，所述第一接入网设备可以通过接入和移动性管理功能(access and mobility management function，AMF)网元向所述第二接入网设备发送所述第一信息。其中，AMF网元可以采用透明转发的方式转发所述第一信息。
在一种可能的实现方式中，第二接入网设备在向所述核心网设备发送第二信息之后，若检测到所述第一QoS flow的服务质量需求又不能被满足时，可以立即向所述核心网设备发送第三信息，所述第三信息用于通知所述核心网设备所述第一QoS flow的服务质量需不能够被满足。相比现有技术中还需要等待一段时间才能重新上报QoS flow的通知控制状态的方式，本申请提供的上述实现方式，可以使得核心网设备能够及时感知QoS flow的最新通知控制状态。
在一种可能的实现方式中，SMF网元在接收到第二接入网设备发送的第一QoS flow的服务质量需求能够被满足的信息后，可以在确定接收的所述第一接入网设备发送的所述至少一个QoS flow的通知控制状态为第一状态后，通知PCF网元所述第一QoS flow的服务质量需求能够被满足。其中，所述第一状态用于指示所述至少一个QoS flow的服务质量需求不能够被满足。上述方式中，SMF网元可以有选择性地将核心网侧与切换后的接入网侧记录的通知控制状态不一致的QoS flow的最新通知控制状态通 知给PCF网元，对于记录的通知控制状态一致的QoS flow，可以不用重新通知。
第二方面，提供一种通信方法，该方法中，当至少一个QoS flow已经由第一接入网设备切换至所述第二接入网设备时，第二接入网设备可以向核心网设备发送第四信息，所述第四信息用于通知所述核心网设备所述至少一个QoS flow的服务质量需求能够被满足。进一步地，SMF网元接收到第二接入网设备发送的至少一个QoS flow的服务质量需求能够被满足的信息后，SMF网元可以向PCF网元发送第五信息，所述第五信息用于通知所述PCF网元所述至少一个QoS flow的通知控制状态能够被满足。其中，可选的，所述至少一个QoS flow为已经由第一接入网设备成功切换至所述第二接入网设备、且需要进行通知控制的所有QoS flow。
上述方法中，可以无需切换前的第一接入网设备参与，由第二接入网设备直接将成功切换后的全部QoS flow的通知控制状态通知给核心网设备，以使核心网设备可以及时感知切换后的QoS flow的通知控制状态，使得核心网侧感知到的QoS flow的通知控制状态与切换后接入网侧记录的QoS flow的通知控制状态相同步，以避免核心网侧做出错误的策略决策。
在一种可能的实现方式中，第二接入网设备在向PCF网元发送第四信息之后，若检测到所述至少一个QoS flow的服务质量需求又不能被满足时，可以立即通知所述核心网设备所述至少一个QoS flow的服务质量需不能够被满足。相比现有技术中还需要等待一段时间才能重新上报QoS flow的通知控制状态的方式，本申请提供的上述实现方式，可以使得核心网设备能够及时感知QoS flow的最新通知控制状态。
在一种可能的实现方式中，SMF网元在接收到第二接入网设备发送的第四信息之后，可以在确定接收的所述第一接入网设备发送的所述至少一个QoS flow的通知控制状态为第一状态后，向PCF网元发送第五信息。其中，所述第一状态用于指示所述至少一个QoS flow的服务质量需求不能够被满足。上述方式中，SMF网元可以有选择性地将核心网侧与切换后的接入网侧记录的通知控制状态不一致的QoS flow的最新通知控制状态通知给PCF网元，对于记录的通知控制状态一致的QoS flow，可以不用重新通知。
第三方面，提供一种通信方法，该方法中，SMF网元确定接收的第一接入网设备发送的至少一个QoS flow的通知控制状态，当所述至少一个QoS flow中的第二QoS flow已经由所述第一接入网设备切换至第二接入网设备时，所述SMF网元确定所述第二QoS flow中所述通知控制状态为第一状态的第三QoS flow。进一步地，所述SMF网元将所述第三QoS flow的所述通知控制状态更新为第二状态，并向PCF网元发送第六信息，所述第六信息用于通知所述PCF网元所述第三QoS flow的所述通知控制状态为第二状态。其中，所述第一状态用于指示所述至少一个QoS flow的服务质量需求不能够被满足，所述第二状态用于指示所述至少一个QoS flow的服务质量需求能够被满足。
上述方法中，考虑到QoS flow发生切换时，一般情况下是因为源接入网设备中QoS flow的服务质量不能满足需求，需要切换到能够满足服务质量需求的目标接入网设备中。基于此，SMF网元在确定出成功切换的QoS flow后，可以默认之前记录的服务质量需求不能被满足的QoS flow的服务质量需求又可以重新被满足，进而通知给 PCF网元，使PCF网元可以及时感知成功切换后的QoS Flow的状态，从而避免做出错误决策。
在一种可能的实现方式中，SMF网元确定所述第二QoS flow中通知控制状态为第一状态的第三QoS flow之前，还可以接收AMF网元发送的第七信息，所述第七信息包括已经由所述第一接入网设备切换至所述第二接入网设备的所述第二QoS flow的标识。以便SMF网元可以获知已经成功切换的QoS flow。
第四方面，提供一种通信方法，该方法中，SMF网元可以确定至少一个QoS flow由第一接入网设备切换至第二接入网设备，进而SMF网元可以向PCF网元发送第八信息，所述第八信息用于指示所述至少一个QoS flow由所述第一接入网设备切换至所述第二接入网设备。PCF网元接收到SMF网元发送的第八信息后，可以确定所述至少一个QoS flow中所述通知控制状态为第一状态的QoS flow，并将确定出的QoS flow的通知控制状态更新为第二状态。其中，所述第一状态用于指示确定出的QoS flow的服务质量需求不能够被满足，所述第二状态用于指示确定出的QoS flow的服务质量需求能够被满足。
一种实现方式中，PCF网元可以配置切换指示触发器(handover indication trigger)，当接收到SMF网元发送的通知至少一个QoS flow已经切换成功的第三信息后，可以触发执行更新QoS flow的通知控制状态的操作。
上述方法中，SMF网元可以通知PCF网元至少一个QoS flow已经切换成功，使得PCF网元可能及时感知到QoS flow的切换，进而及时更新的成功切换的QoS flow的通知控制状态，以便尽可能的保证与切换后的接入网侧记录的QoS flow的通知控制状态相同步，避免做出错误决策。
第五方面，本申请提供第一种通信装置，所述通信装置具备实现上述第一方面涉及的第一接入网设备的功能，比如，所述通信装置包括所述第一接入网设备执行上述第一方面中涉及步骤所对应的模块或单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
在一种可能的设计中，该通信装置可以包括处理模块、和收发模块。处理模块和收发模块可执行上述第一方面或第一方面的任意一种可能的实现方式所提供的方法中第一接入网设备涉及的相应功能。
在另一种可能的设计中，该通信装置可以包括处理器，还可以包括收发器，所述收发器用于收发信号，所述处理器执行程序指令，以完成上述第一方面以及第一方面任意可能的实现方式中第一接入网设备执行的方法。
其中，所述通信装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存实现上述第一方面涉及的第一接入网设备的功能的必要计算机程序指令和/或数据。所述处理器可执行所述存储器存储的计算机程序指令，完成上述第一方面以及第一方面任意可能的实现方式中第一接入网设备执行的方法。
第六方面，本申请提供第二种通信装置，所述通信装置具备实现上述第一方面或者第二方面涉及的第二接入网设备的功能，比如，所述通信装置包括所述第二接入网设备执行上述第一方面或者第二方面中涉及步骤所对应的模块或单元或手段(means)， 所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
在一种可能的设计中，该通信装置可以包括处理模块、和收发模块。处理模块和收发模块可执行上述第一方面或第一方面的任意一种可能的实现方式所提供的方法中第二接入网设备涉及的相应功能，或者，处理模块和收发模块可执行上述第二方面或第二方面的任意一种可能的实现方式所提供的方法中第二接入网设备涉及的相应功能。
在另一种可能的设计中，该通信装置可以包括处理器，还可以包括收发器，所述收发器用于收发信号，所述处理器执行程序指令，以完成上述第一方面以及第一方面任意可能的实现方式中第二接入网设备执行的方法，或者，完成上述第二方面以及第二方面任意可能的实现方式中第二接入网设备执行的方法。
其中，所述通信装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存实现上述第一方面或者第二方面涉及的第二接入网设备的功能的必要计算机程序指令和/或数据。所述处理器可执行所述存储器存储的计算机程序指令，完成上述第一方面以及第一方面任意可能的实现方式中第一接入网设备执行的方法，或者，完成上述第二方面以及第二方面任意可能的实现方式中第二接入网设备执行的方法。
第七方面，本申请提供第三种通信装置，所述通信装置具备实现上述第一方面至第四方面任意一个方面中涉及的SMF网元的功能，比如，所述通信装置包括所述SMF网元执行上述第一方面至第四方面任意一个方面中涉及步骤所对应的模块或单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
在一种可能的设计中，该通信装置可以包括处理模块、和收发模块。处理模块和收发模块可执行上述第一方面至第四方面任意一个方面以及该方面中任意一种可能的实现方式所提供的方法中SMF网元涉及的相应功能。
在另一种可能的设计中，该通信装置可以包括处理器，还可以包括收发器，所述收发器用于收发信号，所述处理器执行程序指令，以完成上述第一方面至第四方面任意一个方面以及该方面任意可能的实现方式中SMF网元执行的方法。
其中，所述通信装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存实现上述第一方面至第四方面任意一个方面涉及的SMF网元的功能的必要计算机程序指令和/或数据。所述处理器可执行所述存储器存储的计算机程序指令，完成上述第一方面至第四方面任意一个方面以及该方面任意可能的实现方式中SMF网元执行的方法。
第八方面，本申请提供第四种通信装置，所述通信装置具备实现第四方面中涉及的PCF网元的功能，比如，所述通信装置包括所述PCF网元执行上述第四方面中涉及步骤所对应的模块或单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
在一种可能的设计中，该通信装置可以包括处理模块、和收发模块。处理模块和收发模块可执行上述第四方面以及所述第四方面中任意一种可能的实现方式所提供的方法中PCF网元涉及的相应功能。
在另一种可能的设计中，该通信装置可以包括处理器，还可以包括收发器，所述 收发器用于收发信号，所述处理器执行程序指令，以完成上述第四方面以及所述第四方面中任意可能的实现方式中PCF网元执行的方法。
其中，所述通信装置还可以包括一个或多个存储器，所述存储器用于与处理器耦合，其保存实现上述第四方面涉及的PCF网元的功能的必要计算机程序指令和/或数据。所述处理器可执行所述存储器存储的计算机程序指令，完成上述第四方面以及所述第四方面任意可能的实现方式中PCF网元执行的方法。
第九方面，本申请提供一种通信系统，所述通信系统包括第五方面涉及的第一种通信装置、第六方面涉及的第二种通信装置、第七方面涉及的第三种通信装置、以及第八方面涉及的第四种通信装置。
第十方面，本申请提供一种芯片，所述芯片可以与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述各方面所述的方法。
第十一方面，本申请提供一种计算机存储介质，所述计算机存储介质存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述各方面所述的方法。
第十二方面，本申请还提供一种包含软件程序的计算机程序产品，当其在计算机上运行时，使得计算机执行上述各方面所述的方法。
附图说明
图1为本申请提供的一种5G通信系统的网络架构图；
图2为本申请提供的一种基于QoS flow的QoS模型；
图3为本申请提供的一种建立QoS flow的流程示意图；
图4为本申请实施例一提供的通信方法的流程示意图；
图5为本申请实施例一提供的场景一下第一RAN设备与第二RAN设备之间的交互流程的示意图；
图6为本申请实施例一提供的场景二下第一RAN设备与第二RAN设备之间的交互流程的示意图；
图7为本申请实施例二提供的通信方法的流程示意图；
图8为本申请实施例二中第二RAN设备通知核心网设备至少一个QoS flow的通知控制状态的流程示意图；
图9为本申请实施例三提供的通信方法的流程示意图；
图10为本申请实施例四提供的通信方法的流程示意图；
图11～图18为本申请实施例提供的通信装置的结构示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。
首先，对本申请提供的技术方案可适用的通信系统进行说明。
本申请提供的技术方案可适用在各种通信系统中，例如长期演进(long term evolution，LTE)系统、第五代(5th generation，5G)通信系统、以及其它类似的通 信系统。图1示例性示出了一种5G通信系统的网络架构图。其中：
终端设备，可以包括具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(user equipment，UE)，移动台(mobile station，MS)，终端设备(terminal equipment)等。
(无线)接入网(radio access network，(R)AN)设备，可以用于实现无线物理层功能、无线资源管理、无线接入控制以及移动性管理等功能。RAN设备可以包括基站，例如为5G系统中的接入节点(access point，AP)、下一代节点B(next generation Node B，gNB)、下一代演进型节点B(ng-eNB，gNB)、收发点(transmission receive point，TRP)、传输点(transmission point，TP)或某种其它接入节点等。需要理解的是，下文的描述，将RAN)设备统称为RAN设备，以便于描述。
用户面功能(user plane function，UPF)网元，作为用户面的功能网元，可以连接外部数据网络，主要功能包含：数据包路由和传输、包检测、业务用量上报、QoS处理、合法监听、上行包检测、下行数据包存储等用户面相关的功能。
AMF网元，其主要功能包含：连接管理、移动性管理、注册管理、接入认证和授权、可达性管理、安全上下文管理等接入和移动性相关的功能。
SMF网元，其主要功能包含：会话管理(如会话建立、修改和释放，包含UPF和RAN之间的隧道维护)、UPF的选择和控制、业务和会话连续性(service and session continuity，SSC)模式选择、漫游等会话相关的功能。
PCF网元，其主要功能包含：统一策略制定、策略控制的提供和获取策略决策相关的签约信息等策略相关的功能。
应用功能(application function，AF)网元，既可以是第三方的应用控制平台，也可以是运营商部署的设备，其主要功能包括提供应用相关的信息，为多个应用服务器提供服务。
数据网络(data network，DN)，其主要功能是提供具体的数据业务，如运营商服务，互联网接入或者第三方业务。
上述内容主要对本申请中可能涉及到的网元或设备进行说明。需要理解的是，图1所示的网络架构仅作为示例性说明，并不对本申请可适用的通信系统的网络架构构成限定。本申请可适用的通信系统中还可以包括其它网元或设备，本申请不在一一列举。并且，本申请可适用的通信系统中各网元或设备之间的连接形式既可以采用图1所示的基于参考点的形式，还可以是基于服务化接口的形式。此外，本申请可适用的通信系统还可以分为非漫游场景、以及漫游场景，其中，漫游场景可以进一步划分为本地疏导(local breakout，)场景、以及归属路由(home routed)场景。这些通信场景下通信系统的网络架构可能有所区别，但均可适用于本申请实施例中。
目前，在5G通信系统中，为了保证业务端到端的服务质量，提出了一种基于QoS flow的QoS模型。参照图2所示，终端设备可以通过RAN设备与核心网侧的UPF之间建立至少一个PDU会话(PDU session)，针对每个PDU会话，终端设备、RAN设备、UPF网元之间可以建立起至少一个QoS flow。图3中示例性示出了一种建立QoS flow的流程示意图，各网元或设备间交互流程包括：
步骤301、SMF网元根据本地策略或者PCF网元发送的策略和计费控制(policy and  charging control，PCC)规则指示终端设备、RAN设备、UPF网元建立QoS flow。具体的建立过程分为三个阶段：步骤301A、SMF网元向UPF网元发送业务数据流(service data flow，SDF)信息，其中包含QoS控制信息；步骤301B、SMF网元通过AMF网元向(R)AN设备发送QoS flow的QoS配置文件(QoS profile)；步骤301C、SMF网元通过AMF网元和/或(R)AN设备向终端设备发送QoS规则，其中包含QoS控制信息。需要说明的是，QoS配置文件与QoS控制信息中包含的内容基本相同，均为SMF根据本地策略或PCC规则生成的。
步骤302、终端设备、RAN设备、UPF网元之间建立QoS flow。(R)AN设备可以根据QoS配置文件建立空口的DRB，并存储QoS flow与DBR的绑定关系。终端设备、RAN设备、UPF网元之间传输数据包时，下行方向上，当UPF网元接收到下行数据包时，根据SMF网元发送的SDF信息执行QoS控制，在下行数据包的包头中携带用于标识QoS flow的服务质量流标识(QoS flow identifier，QFI)，RAN设备接收到下行数据包时，通过解析包头中的QFI确认可以使用的QoS flow，并根据存储的QoS flow和DRB的绑定关系，将该下行数据包放在对应的DRB上传输。上行方向上，终端设备需要发送上行数据包时，可以根据QoS规则确定QoS flow，在上行数据包的包头中携带QFI，进而根据QoS flow和DBR的绑定关系，将该上行数据包放在对应的DRB上传输，RAN设备接收到上行数据包时，根据包头中的QFI，在向UPF网元转发的该上行数据包的包头中携带QFI，UPF网元接收到RAN设备发送的该上行数据包时，验证该上行数据包是否使用正确的QoS flow传输。
其中，因SMF生成的QoS配置文件的不同，建立起的QoS flow可以包括两种类型：
类型一为：保证比特率(guaranteed bit rate，GBR)QoS flow。这种情况下，QoS配置文件中可以包括用于标识QoS属性信息的5G QoS标识(5G QoS identifier，5QI)、分配和预留优先级(allocation and retention priority，ARP)、保证流比特率(guaranteed flow bit rate，GFBR)、以及最大比特率(maximum bit rate，MBR)。可选的，QoS配置文件中还可以包括通知控制(notification control)信息，当QoS配置文件包括notification control信息时，GBR QoS flow为需要进行notification control的GBR QoS flow，反之则为不需要进行notification control的GBR QoS flow。
当在某一GBR QoS flow对应的DRB上传输数据包时，若RAN设备检测到该GBR QoS flow的服务质量需求不能被满足、且该GBR QoS flow被配置为需要进行notification control，那么，RAN设备可以通过AMF网元通知SMF网元该GBR QoS flow的服务质量需求不能被满足，以便SMF网元根据本地策略修改或删除该GBR QoS flow、或者SMF网元指示PCF网元修改或删除该GBR QoS flow。一示例中，当传输数据包的比特率达不到GFBR所规定的期望比特率时，可以认为该GBR QoS flow的服务质量需求不能被满足。另一示例中，当传输数据包时的传输时延(或丢包率等)不符合5QI中包含的传输时延(或丢包率等)时，也可以认为该GBR QoS flow的服务质量需求不能被满足。
类型二为：不保证比特率(non-guaranteed bit rate，non-GBR)QoS flow。这种情况下，QoS配置文件中可以包括5QI、ARP等。
其中，针对需要进行notification control的QoS flow，当发生RAN设备之间的切换时，可能出现RAN侧记录的通知控制状态与核心网侧记录的通知控制状态不同步的问题，使得核心网侧容易对QoS flow做出错误的策略决策。
例如，在终端设备进行RAN设备之间切换的场景下，终端设备中已建立好的PDU会话可以在RAN设备之间进行切换，相应地，PDU会话对应的QoS flow也可以在RAN设备之间进行切换。由于切换前的源RAN设备建立的DRB与切换后的目标RAN设备建立的DRB可能有所不同，故在进行切换之前，使用该QoS flow对应的源RAN设备建立的DRB传输数据包时服务质量需求不能被满足，但是在进行切换之后，很可能在使用该QoS flow对应目标RAN设备建立的DRB传输数据包时服务质量需求又可以重新被满足。
这种情况下，由于SMF网元和PCF网元感知不到QoS flow在RAN设备之间的切换，所以SMF网元和PCF网元记录的QoS flow的通知控制状态很可能还是切换前源RAN设备通知的服务质量需求不能被满足的状态，因此SMF网元或PCF网元在重新对源RAN设备通知的服务质量需求不能被满足的QoS flow进行策略决策时，可能做出错误的策略决策。例如，在切换后的目标RAN设备中QoS flow的服务质量需求能够被满足的情况下，删除该QoS flow或者降低该QoS flow的服务质量需求等。
为解决上述问题，本申请实施例提出了一种通信方法及装置，在QoS flow在RAN设备之间发生切换的场景下，通过及时向核心网侧反馈切换后的QoS flow的通知控制状态，以便核心网侧与切换后的RAN设备中维护的QoS flow的通知控制状态可以尽可能的保持同步。
应理解，本申请实施例中QoS flow在RAN设备之间发生切换的场景并不限于终端设备在RAN设备之间切换的场景，还可以是其它可能出现QoS flow在RAN设备之间切换的场景。比如，当终端设备由无线资源控制(radio resource control，RRC)非活跃态(inactive)恢复到RRC连接态(connected)的场景下，也可能出现QoS flow在RAN设备之间的切换。再比如，在终端设备与主RAN设备和从RAN设备建立PDU会话的双重连接(dual connection)的场景下QoS flow也可能由主RAN设备切换到从RAN设备，或者由从RAN设备切换到主RAN设备。这些场景也同样适用于本申请实施例中。
下面结合具体实施例对本申请提供的通信方法进行详细说明。其中，需要理解的是，下文中涉及的“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序等。例如，下文的描述中为便于区分，将QoS flow切换前对应的源RAN称为第一RAN设备，将QoS flow切换后对应的目标RAN设备称为第二RAN设备。
实施例一
参照图4所示，为本申请实施例一提供的通信方法的流程示意图，该方法包括：
步骤401、在至少一个QoS flow由第一RAN设备切换至第二RAN设备的过程中，第一RAN设备向第二RAN设备发送第一信息，第一信息用于指示第一RAN设备已经通知核心网设备至少一个QoS flow的服务质量需求不能被满足。
本申请实施例一中，所述第一RAN设备已经通知核心网设备至少一个QoS flow 的服务质量需求不能被满足，可以理解为第一RAN设备最近一次通知给核心网设备的至少一个QoS flow的通知控制状态为服务质量需求不能被满足的状态。下文中为便于描述，将通知控制状态分为第一状态、第二状态，其中，第一状态用于指示QoS flow的服务质量需求不能被满足，第二状态用于指示QoS flow的服务质量需求能够被满足。至少一个QoS flow为需要进行notification control的QoS flow。应理解，本申请中需要进行notification control的QoS flow并不限定于是GBR QoS flow，还可以是其它任意需要在服务质量需求不满足的情况下通知给核心网设备的QoS flow。
第一RAN设备在向第二RAN设备指示第一RAN设备已经通知核心网设备至少一个QoS flow的服务质量需求不能被满足时，第一RAN设备可以在向第二RAN设备发送的第一信息中携带第一RAN设备最近一次通知给核心网设备的所述至少一个QoS flow的标识，QoS flow的标识例如为QFI。或者，第一RAN设备可以在向第二RAN设备发送的第一信息中携带所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态，所述通知控制状态为第一状态。
在未发生切换之前，第一RAN设备可以检测已建立的QoS flow的服务质量需求能否被满足，当所述至少一个QoS flow不能被满足、且所述至少一个QoS flow为需要进行notification control的QoS flow时，第一RAN设备可以通知核心网设备所述至少一个QoS flow的通知控制状态为第一状态，当至少一个QoS flow又可以重新被满足时，第一RAN设备还可以再次通知核心网设备所述至少一个QoS flow为第二状态。基于此，第一RAN设备可以在本地记录通知给核心网设备的QoS flow的通知控制状态，例如可以记录一个服务质量通知控制(QoS notification control，QNC)的发送情况表。
本申请的一示例中，QNC的发送情况表可以记录有QoS flow的标识、以及对应最近一次通知给核心网设备的QoS flow的通知控制状态。其中，QoS flow的标识例如为QFI，通知控制状态分为第一状态、第二状态。表1示例性列举一种QNC的发送情况表：
表1
QFI 通知控制状态
QoS flow#1 1
QoS flow#2 0
... ...
QoS flow#n 1
如表1所示，第一RAN设备记录的QoS flow用#1～#n来标识，对应的通知控制状态为“1”时，表征为第一状态，即QoS flow的服务质量需求不能被满足，对应的通知控制状态为“0”时，表征为第二状态，即QoS flow的服务质量需求能够被满足。其中，第一RAN设备每次向核心网设备通知QoS flow的通知控制状态时，可以对应更新本地记录的QNC的发送情况表。例如，对于QoS flow#1来说，表1中当前记录的通知控制状态为“1”，若之后在检测到QoS flow#1的服务质量需求又能够被满足时，可以通知核心网设备QoS flow#1的服务质量需求又能够被满足，相应地，可以将 本地记录的QoS flow#1的通知控制状态更新为“0”。
当第一RAN设备检测到至少一个QoS flow需要由第一RAN设备切换至第二RAN设备时，可以将记录的最新的QNC的发送情况表的内容通知给第二RAN设备，或者，也可以将记录的最新的QNC的发送情况表中通知控制状态为“1”的QoS flow的内容通知给第二RAN设备。
本申请的另一示例中，QNC的发送情况表可以仅记录最近一次通知给核心网设备的通知控制状态为第一状态的至少一个QoS flow的标识，即记录最近一次通知给核心网设备的服务质量需求不能被满足的至少一个QoS flow的标识。表2示例性列举一种QNC的发送情况表：
表2
QFI
QoS flow#1
QoS flow#2
...
QoS flow#n
如表2所示，第一RAN设备记录的至少一个QoS flow用#1～#n来标识。其中，第一RAN设备每次向核心网设备通知QoS flow的通知控制状态时，可以更新记录的QNC的发送情况表。例如，对于QoS flow#1来说，表2中当前记录有QoS flow#1，说明QoS flow#1的服务质量需求不能被满足，若之后在检测到QoS flow#1的服务质量需求又能够被满足时，第一RAN设备可以通知核心网设备QoS flow#1的服务质量需求又能够被满足，相应地，可以将表2中记录的QoS flow#1删除。同理，若之后检测到除表2中记录的QoS flow以外的其它QoS flow的服务质量需求不能被满足，且通知给核心网设备后，也可以在表2中增加其它QoS flow的标识。
当第一RAN设备检测到至少一个QoS flow需要由第一RAN设备切换至第二RAN设备时，可以将记录的最新的QNC的发送情况表的内容通知给第二RAN设备。
当然，上述示例仅作为示例性说明，本申请实施例中第一RAN设备向第二RAN设备发送第一信息的形式并不限定于此。
步骤402、第二RAN设备接收到第一RAN设备发送的第一信息后，向核心网设备发送第二信息，所述第二信息用于通知核心网设备所述至少一个QoS flow中第一QoS flow的服务质量需求能够被满足，其中，第一QoS flow为已经由第一RAN设备成功切换至第二RAN设备的QoS flow、且需要进行notification control的所有QoS flow。。
本申请实施例中，由于至少一个QoS flow由第一RAN设备切换至第二RAN设备的过程中，不一定所有的QoS flow都能够成功切换，有些对于第二RAN设备来说，服务质量需求仍无法被满足的QoS flow可能直接被删除，因此，第二RAN设备可以首先从至少一个QoS flow中确定出可以已经由第一RAN设备成功切换至第二RAN设备的QoS flow，即上述第一QoS flow，进而可以默认成功切换过来的第一QoS flow的服务质量需求能够被满足。
下面列举两种具体场景，对本申请实施例一中第一RAN设备和第二RAN设备之间的交互流程进行说明。
场景一：第一RAN设备和第二RAN设备之间存在直连的Xn接口，这种情况下，切换流程可以是基于Xn接口的切换。
参照图5所示，为本申请实施例一提供的场景一下第一RAN设备与第二RAN设备之间的交互流程：
步骤501、第一RAN设备直接向第二RAN设备发送切换请求(handover request)，其中，切换请求中携带有第一RAN设备最近一次通知给核心网设备的所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态，通知控制状态为第一状态，即表征QoS flow的服务质量需求不能够被满足。
步骤502、第二RAN设备向第一RAN设备发送切换请求确认响应(handover request acknowledge)。
场景二：第一RAN设备和第二RAN设备之间不存在直连的Xn接口，切换流程有核心网设备参与，例如可以为基于N2接口的切换。
参照图6所示，为本申请实施例一提供的场景二下第一RAN设备与第二RAN设备之间的交互流程：
步骤601、第一RAN设备向为第一RAN设备提供服务的第一AMF网元发送切换需求(handover required)，其中，handover required中携带有第一RAN设备最近一次通知给核心网设备的所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态，通知控制状态为第一状态，即表征QoS flow的服务质量需求不能够被满足。
本申请的一示例中，所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态可以包含在源到目标透明容器(source to target transparent container)中，该容器中包含第一RAN设备通过核心网向第二RAN设备发送的内容，AMF网元只起到转发的作用，不感知其中的内容。
步骤602、第一AMF网元选择为第二RAN设备提供服务的第二AMF网元。
步骤603、第一AMF网元向第二AMF网元发送UE上下文创建请求(namf_communication_createUEcontext request)，其中，携带有所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态。
步骤604、第二AMF网元与SMF网元之间进行PDU会话的会话管理上下文更新流程，以便进行基于N4接口的会话建立流程。
步骤605、第二AMF网元向第二RAN设备发送切换请求(handover request)，handover request中携带有第一RAN设备最近一次通知给核心网设备的所述至少一个QoS flow的标识、以及所述至少一个QoS flow的通知控制状态。
步骤606、第二RAN设备向第二AMF网元发送切换请求确认响应(handover request acknowledge)。
步骤607、第二AMF网元与SMF网元之间进行PDU会话的会话管理上下文更新流程、以便进行基于N4接口的会话修改流程。
步骤608、第二AMF网元向第一AMF网元发送UE上下文创建响应 (namf_communication_createUEcontext response)。
上述场景一和场景二中，第二RAN设备在确定第一RAN设备已经通知给核心网设备所述至少一个QoS flow的服务质量需求不能被满足后，后续，第二RAN设备在检测到至少一个QoS flow中第一QoS flow成功由第一RAN设备切换到了第二RAN设备时，为了及时让核心网设备获知成功切换的第一QoS flow的最新通知控制状态，本申请实施例中，可以由第二RAN设备直接通知核心网设备成功切换的第一QoS flow的服务质量需求能够被满足。
上述流程中第一RAN设备或第二RAN设备向核心网设备通知QoS flow的通知控制状态的实现方式可以有以下两种：
第一种实现方式中，第一RAN设备或第二RAN设备可以通过AMF网元向SMF网元通知QoS flow的通知控制状态，SMF网元在获知QoS flow的通知控制状态的情况下，可以根据本地策略来执行会话管理策略修改流程，实现对QoS flow进行修改或删除操作。
第二种实现方式中，第一RAN设备或第二RAN设备可以通过AMF网元向SMF网元通知QoS flow的通知控制状态，SMF网元进一步可以指示PCF网元QoS flow的通知控制状态，以便SMF网元与PCF网元基于动态的PCC规则执行会话管理策略修改流程，实现对QoS flow进行修改或删除操作。
其中，在第二种实现方式下，SMF网元在接收到第二RAN设备发送的至少一个QoS flow中第一QoS flow的服务质量需求能够被满足的信息，即第二信息后，SMF网元可以通知PCF网元第一QoS flow的服务质量需求能够被满足。
此外，所述第二RAN设备通知核心网设备所述至少一个QoS flow中第一QoS flow的服务质量需求能够被满足之后，一种实现方式中，若第二RAN设备后续在检测到所述第一QoS flow的服务质量需求又不能被满足时，可以立即向核心网设备发送第三信息，所述第三信息用于通知核心网设备所述第一QoS flow的服务质量需求又不能被满足。相比现有技术中还需要等待预设时长后才能再次通知QoS flow的通知控制状态，本申请提出的上述实现方式可以减少时延，使得核心网设备可以及时地感知核心网侧对QoS flow的最新通知控制状态。
上述实施例一提供的方式中，至少一个QoS flow由第一RAN设备切换至第二RAN设备的过程中，至少一个QoS flow的通知控制状态也可以同步地由第一RAN设备转移到第二RAN设备，进而可以使得第二RAN设备能够准确获知第一RAN设备已经通知给核心网设备的至少一个QoS flow的通知控制状态，也就相当于获知了当前核心网设备记录的QoS flow的通知控制状态。这种情况下，第二RAN设备通过向核心网设备通知切换后QoS flow的通知控制状态，能够使核心网侧感知到的QoS flow的通知控制状态与切换后接入网侧记录的QoS flow的通知控制状态相同步，从而可以避免做出错误的策略决策。
实施例二
参照图7所示，为本申请实施例二提供的通信方法的流程示意图，该方法包括：
步骤701、当至少一个QoS flow由第一RAN设备切换至第二RAN设备时，第二RAN设备向核心网设备发送第四信息，所述第四信息用于通知核心网设备所述至少一 个QoS flow的服务质量需求能够被满足。
其中，本申请实施例二中所述至少一个QoS flow可以理解为已经由第一RAN设备成功切换至第二RAN设备、且需要进行notification control的所有QoS flow。
第二RAN设备可以向AMF网元发送所述第四信息，进而由AMF网元向SMF网元转发所述第四信息，以便通知SMF网元所述至少一个QoS flow的服务质量需求能够被满足。进一步地，SMF网元接收到第二RAN设备发送的第四信息后，还可以向PCF网元发送第五信息，第五信息用于通知PCF网元所述至少一个QoS flow的服务质量需求能够被满足。
具体实施中，SMF网元接收到所述第四信息后，可以更新记录的所述至少一个QoS flow的通知控制状态。其中，通知控制状态分为第一状态和第二状态，第一状态用于指示至少一个QoS flow的服务质量需求不能够被满足，第二状态用于指示至少一个QoS flow的服务质量需求能够被满足。SMF网元还可以视具体情况确认是否通知PCF网元更新后的至少一个QoS flow的通知控制状态。
本申请的一示例中，SMF网元在接收到第二RAN设备通知的至少一个QoS flow的通知控制状态为第二状态的信息后，接收到第四信息后，可以判断下是否从第一RAN设备处接收到所述至少一个QoS flow的通知控制状态为第一状态的信息：若判断结果为否，则说明切换前核心网侧并未接收到所述至少一个QoS flow的服务质量需求不能被满足的通知，这种情况下，SMF网元可以不用重复地通知PCF网元至少一个QoS flow的通知控制状态为第二状态；若判断结果为是，那么，可以说明切换前核心网侧已经接收到所述至少一个QoS flow的服务质量需求不能被满足的通知，为了保证核心网侧与切换后的第二RAN设备记录的QoS flow的通知控制状态可以同步，SMF网元可以在确定最近一次接收的第一RAN设备通知的所述至少一个QoS flow的通知控制状态为第一状态后，向PCF网元发送所述第五信息，以便通知PCF网元所述至少一个QoS flow的通知控制状态为第二状态。
下面结合具体场景，对本申请实施例二中第二RAN设备通知核心网设备至少一个QoS flow的通知控制状态的过程进行说明，参照图8所示：
假设终端设备通过第一RAN设备与为第一RAN设备服务的第一UPF网元之间的PDU会话，已经切换为终端设备通过第二RAN设备与为第二RAN设备服务的第二UPF网元之间的PDU会话，并且，至少一个QoS flow也由终端设备、第一RAN设备、第一UPF构成的端到端的路径切换至了由终端设备、第二RAN设备、第二UPF构成的端到端的路径。
步骤801、第二RAN设备向AMF网元发送N2消息，N2消息中包括PDU会话的标识、以及N2会话管理(session management，SM)信息。其中，N2SM消息中包括所述至少一个QoS flow的QFI、以及所述至少一个QoS flow的通知控制状态，即第二状态。
可选的，N2SM消息还可以包括服务质量需求不能被满足、且需要进行notification control的其它QoS flow的QFI、以及所述其它QoS flow的通知控制状态，所述其它QoS flow的通知控制状态为第一状态。
步骤802、AMF网元向SMF网元发送PDU会话会话管理上下文更新请求 (nsmf_PDUsession_updateSMcontext request)，其中，该请求中可以包括所述至少一个QoS flow的QFI、以及所述至少一个QoS flow的通知控制状态，所述至少一个QoS flow的通知控制状态为第二状态。可选的，该请求中还可以包括所述其它QoS flow的QFI、以及所述其它QoS flow的通知控制状态，所述其它QoS flow的通知控制状态为第一状态。
步骤803、SMF网元接收到该请求后，对于第二RAN设备上报的通知控制状态为第二状态的QoS flow，SMF网元视具体情况确定是否需要通知给PCF网元，这一过程可参见上述示例一中的描述。对于第二RAN设备上报的通知控制状态为第一状态的QoS flow，SMF网元可以按照现有流程发起会话管理策略修改流程，以实现对QoS flow进行删除或修改操作。
上述实施例二中，第二RAN设备可以将从第一RAN设备中成功切换过来的至少一个需要进行notification control的QoS flow的通知控制状态发送给核心网设备，以便核心网设备能够及时、准确地感知切换后QoS flow的通知控制状态，从而可以避免核心网设备做出做出错误的策略决策。
实施例三
参照图9所示，为本申请实施例三提供的通信方法的流程示意图，该方法包括：
步骤901、SMF网元确定接收的第一RAN设备发送的至少一个QoS flow的通知控制状态。
其中，本申请实施例三中所述至少一个QoS flow可以理解为切换前终端设备的PDU会话中对应的需要进行notification control的QoS flow。通知控制状态分为第一状态和第二状态，第一状态用于指示QoS flow的服务质量需求不能够被满足，第二状态用于指示QoS flow的服务质量需求能够被满足。
步骤902、当所述至少一个QoS flow中的第二QoS flow已经由第一RAN设备切换至第二RAN设备时，SMF网元确定所述第二QoS flow中通知控制状态为第一状态的第三QoS flow，并将第三QoS flow的通知控制状态更新为第二状态。
步骤903、SMF网元向PCF单元发送第六信息，第六信息用于通知PCF网元第三QoS flow的通知控制状态为第二状态。
本申请的一示例中，SMF网元可以接收AMF网元发送的第七信息，第七信息中可以包括已经由第一RAN设备成功切换至第二RAN设备的第二QoS flow的标识，还可以包括已经由第一RAN设备成功切换至第二RAN设备的PDU会话的标识，以便SMF网元确定成功切换的PDU会话、以及第二QoS flow的信息。
其中，当PDU会话、以及QoS flow在第一RAN设备和第二RAN设备之间的切换是基于Xn接口的切换，那么，可以由第一RAN设备或第二RAN设备将成功切换的PDU会话、以及第二QoS flow通知给AMF网元，进而由AMF网元通知给SMF网元。当PDU会话、以及QoS flow在第一RAN设备和第二RAN设备之间的切换是基于N2接口的切换，那么，AMF网元在切换过程中可以感知成功切换的PDU会话、以及第二QoS flow，进而可以直接通过SMF网元成功切换的PDU会话、以及第二QoS flow。
对于所述至少一个QoS flow中成功切换的第二QoS flow，SMF网元可以首先确 定最近一次从第一RAN设备接收的至少一个QoS flow的通知控制状态中第二QoS flow的通知控制状态是否为第一状态。针对第二QoS flow中通知控制状态为第一状态的第三QoS flow，可以默认第三QoS flow的服务质量需求又能重新被满足，并且可以通知PCF网元所述第三QoS flow的服务质量需求又可以被满足。针对第二QoS flow中通知控制状态为第二状态的第四QoS flow，由于核心网侧记录的第四QoS flow的服务质量需求已经是被满足的，所以SMF网元可以不必重复通知PCF网元第四QoS flow的通知控制状态。
对于所述至少一个QoS flow中没有已经由第一RAN设备成功切换至第二RAN设备的QoS flow，SMF网元可以按照现有流程通知PCF网元，以便PCF网元对这些QoS flow重新进行策略决策。
具体来说，SMF网元可以在发起会话管理策略关联修改(SM policy association modification)流程中通知PCF网元有关QoS flow的通知控制状态。其中，PCF网元中配置有策略控制请求触发器(policy control request trigger)，PCF网元可以识别到SMF网元发送的通知，其中包含第三QoS flow的服务质量需求能够被满足的信息，进而PCF网元可以根据SMF网元发送的通知进行策略决策，并将策略决策的结果发送给SMF网元。
上述实施例三中，考虑到QoS flow在第一RAN设备和第二RAN设备之间的切换时，一般情况下是因为第一RAN设备中QoS flow的服务质量不能满足需求，需要切换到能够满足服务质量需求的第二RAN设备中。基于此，SMF网元在确定出成功切换的QoS flow后，可以默认之前记录的服务质量需求不能被满足的QoS flow的服务质量需求又可以重新被满足，进而通知给PCF网元，使PCF网元可以及时感知成功切换后的QoS Flow的状态，从而避免做出错误决策。
实施例四
参照图10所示，为本申请实施例四提供的通信方法的流程示意图，该方法包括：
步骤1001、SMF网元确定至少一个QoS flow已经由第一RAN设备切换至第二RAN设备。
本申请实施例四中，所述至少一个QoS flow可以理解为已经由第一RAN设备成功切换至第二RAN设备的QoS flow。示例性的，SMF网元可以在AMF网元的通知下确定至少一个QoS flow成功切换成功，具体可参照上述实施例三中的相关描述。
步骤1002、SMF网元向PCF网元发送第八信息，所述第八信息用于指示至少一个QoS flow已经由第一RAN设备切换至第二RAN设备。
区别于上述实施例三，本申请实施例四中，SMF网元可以在发起会话管理策略关联修改(SM policy association modification)流程中通知PCF网元至少一个QoS flow已经切换成功。进一步地，由PCF网元更新记录的至少一个QoS flow的通知控制状态。其中，通知控制状态分为第一状态和第二状态，第一状态用于指示QoS flow的服务质量需求不能够被满足，第二状态用于指示QoS flow的服务质量需求能够被满足。
步骤1003、PCF网元接收到第八信息后，确定所述至少一个QoS flow中所述通知控制状态为第一状态的QoS flow，并将确定出的QoS flow的通知控制状态更新为第二状态。
一种实现方式中，PCF网元可以配置切换指示触发器(handover indication trigger)，当接收到SMF网元发送的通知至少一个QoS flow已经切换成功的第八信息后，可以触发执行更新QoS flow的通知控制状态的操作。进而PCF网元可以根据最新更新的QoS flow的通知控制状态，进行策略决策，并将策略决策的结果发送给SMF网元。
上述实施例四中，SMF网元可以在确定出至少一个QoS flow切换成功后，通知PCF网元至少一个QoS flow切换成功，进而由PCF网元更新至少一个QoS flow的通知控制状态，从而使PCF网元可以及时感知成功切换后的QoS Flow的状态，尽可能的避免做出错误决策。
下面，基于相同的技术构思，结合附图对本申请实施例提供的通信装置进行介绍。
本申请实施例提供了一种通信装置，所述通信装置具备实现上述方法实施例一中第一RAN设备的功能，比如，所述通信装置包括所述第一RAN设备执行上述方法实施例一涉及步骤所对应的模块或单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
图11示出了本申请实施例提供的一种通信装置1100的结构示意图，其中，所述装置1100包括处理器1101、以及收发器1102。其中，所述处理器1101被配置为支持第一RAN设备执行上述方法实施例一中涉及的功能。所述收发器1102被配置为支持第一RAN设备收发消息的功能。所述装置1100还可以包括存储器1103，其中，处理器1101、收发器1102和存储器1103相连，该存储器1103用于存储实现上述方法实施例一中涉及的第一RAN设备的功能所必要的计算机程序指令，该处理器1101用于执行该存储器1103存储的计算机程序指令，以控制收发器1102收发信号，完成上述方法实施例一中第一RAN设备执行相应功能的步骤。
具体的，所述处理器1101，用于在至少一个服务质量流由所述通信装置1100切换至第二接入网设备的过程中，用所述收发器1102向所述第二接入网设备发送第一信息，所述第一信息用于指示所述通信装置1100已经通知核心网设备所述至少一个服务质量流的服务质量需求不能被满足。
其中，一种可能的实现方式中，所述第一信息中可以包括所述至少一个服务质量流的标识、以及所述至少一个服务质量流的通知控制状态，所述通知控制状态为第一状态，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足。
一种可能的实现方式中，所述处理器1101，具体用于：用所述收发器1102通过与所述第二接入网设备相连的接口向所述第二接入网设备发送所述第一信息；或者，用所述收发器1102通过AMF网元向所述第二接入网设备发送所述第一信息。
其中，所述处理器1101、以及收发器1102所执行的具体步骤可参见上述方法实施例一第一RAN设备涉及的步骤中的相关描述，这里不再详述。
上述通信装置1100还可以由逻辑单元来实现，图12示出了本申请实施例提供的一种通信装置1200的结构示意图，该装置1200包括处理模块1201、以及收发模块1202。其中，处理模块1201对应于上述通信装置1100中所述的处理器1101，收发模块1202对应于上述通信装置1100中所述的收发器1102，可分别用于实现上述方法实施例一涉及的第一RAN设备的相应功能，具体实现过程可参照上述方法实施例一以及上述通信装置1100中的相关描述，这里不再赘述。
本申请实施例提供了另一种通信装置，所述通信装置具备实现上述方法实施例一或二中涉及的第二RAN设备的功能，比如，所述通信装置包括所述第二RAN设备执行上述方法实施例一或二中涉及步骤所对应的模块或单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
图13示出了本申请实施例提供的一种通信装置1300的结构示意图，其中，所述装置1300包括处理器1301、以及收发器1302。其中，所述处理器1301被配置为支持第二RAN设备执行上述方法实施例一或二中涉及的功能。所述收发器1302被配置为支持第二RAN设备收发消息的功能。所述装置1300还可以包括存储器1303，其中，处理器1301、收发器1302和存储器1303相连，该存储器1303用于存储实现上述方法实施例一或二中涉及的第二RAN设备的功能所必要的计算机程序指令，该处理器1301用于执行该存储器1303存储的计算机程序指令，以控制收发器1302收发信号，完成上述方法实施例一或二中第二RAN设备执行相应功能的步骤。
在一种可能的设计中，所述处理器1301，用于用所述收发器1302接收所述第一接入网设备发送的第一信息，所述第一信息用于指示所述第一接入网设备已经通知核心网设备至少一个服务质量流的服务质量需求不能被满足。所述处理器1301，还用于用所述收发器1302向所述核心网设备发送第二信息，所述第二信息用于通知所述核心网设备所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足，其中，所述第一服务质量流为已经由所述第一接入网设备切换至所述通信装置1300的服务质量流。
其中，所述处理器1301，还用于在检测到所述第一服务质量流的服务质量需求不能被满足时，用所述收发器1302向所述核心网设备发送第三信息，所述第三信息用于通知所述核心网设备所述第一服务质量流的服务质量需不能够被满足。
在另一种可能的设计中，当至少一个服务质量流已经由第一接入网设备切换至所述通信装置1300时，所述处理器1301用于用所述收发器1302向核心网设备发送第四信息，所述第四信息用于通知所述核心网设备所述至少一个服务质量流的服务质量需求能够被满足。可选的，所述至少一个服务质量流为已经由第一接入网设备切换至所述通信装置1300、且需要进行通知控制的所有服务质量流。
其中，所述处理器1301、以及收发器1302所执行的具体步骤可参见上述方法实施例一或二中第二RAN设备涉及的步骤中的相关描述，这里不再详述。
上述通信装置1300还可以由逻辑单元来实现，图14示出了本申请实施例提供的一种通信装置1400的结构示意图，该装置1400包括处理模块1401、以及收发模块1402。其中，处理模块1401对应于上述通信装置1300中所述的处理器1301，收发模块1402对应于上述通信装置1300中所述的收发器1302，可分别用于实现上述方法实施例一或方法实施例二中涉及的第二RAN设备的相应功能，具体实现过程可参照上述方法实施例一或方法实施例二以及上述通信装置1300中的相关描述，这里不再赘述。
本申请实施例提供了另一种通信装置，所述通信装置具备实现上述方法实施例一至四中任一个方法实施例涉及的SMF网元的功能，比如，所述通信装置包括所述SMF网元执行上述上述方法实施例一至四中任一个方法实施例中涉及步骤所对应的模块或 单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
图15示出了本申请实施例提供的一种通信装置1500的结构示意图，其中，所述装置1500包括处理器1501、以及收发器1502。其中，所述处理器1501被配置为支持SMF网元执行上述方法实施例一至四中任一方法实施例中涉及的功能。所述收发器1502被配置为支持SMF网元收发消息的功能。所述装置1500还可以包括存储器1503，其中，处理器1501、收发器1502和存储器1503相连，该存储器1503用于存储实现上述方法实施例一至四中任一方法实施例中涉及的SMF网元的功能所必要的计算机程序指令，该处理器1501用于执行该存储器1503存储的计算机程序指令，以控制收发器1502收发信号，完成上述方法实施例一至四中任一方法实施例中SMF网元执行相应功能的步骤。
第一种可能的设计中，所述处理器1501可以用于用所述收发器1502接收第二接入网设备发送的至少一个服务质量流的通知控制状态，所述至少一个服务质量流为已经由第一接入网设备切换至所述第二接入网设备的服务质量流，所述通知控制状态为第二状态，所述第二状态用于指示所述至少一个服务质量流的服务质量需求能够被满足。所述处理器1501还可以用于用所述收发器1502向PCF网元发送第五信息，所述第五信息用于通知所述PCF网元所述至少一个服务质量流的服务质量需求能够被满足。
可选的，所述处理器1501，还可以用于在用所述收发器1502向所述PCF网元发送所述第五信息之前，所述处理器1501确定接收的所述第一接入网设备发送的所述至少一个服务质量流的通知控制状态为第一状态，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足。
第二种可能的设计中，所述处理器1501可以用于确定接收的第一接入网设备发送的至少一个服务质量流的通知控制状态。进一步地，所述处理器1501还可以用于当所述至少一个服务质量流中的第二服务质量流已经由所述第一接入网设备切换至第二接入网设备时，确定所述第二服务质量流中所述通知控制状态为第一状态的第三服务质量流。进一步地，所述处理器1501还可以用于将所述第三服务质量流的所述通知控制状态更新为第二状态，并用所述收发器1502向PCF网元发送第六信息，所述第六信息用于通知所述PCF网元所述第三服务质量流的所述通知控制状态为第二状态。
其中，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足，所述第二状态用于指示所述至少一个服务质量流的服务质量需求能够被满足。
可选地，所述处理器1501还可以用于用所述收发器1502接收到AMF网元发送的第七信息，所述第七信息包括已经由所述第一接入网设备切换至所述第二接入网设备的所述第二服务质量流的标识。
第三种可能的设计中，所述处理器1501可以用于确定至少一个QoS flow由第一接入网设备切换至第二接入网设备，进而所述处理器1501还可以用于用收发器1502向PCF网元发送第八信息，所述第八信息用于指示所述至少一个QoS flow由所述第一接入网设备切换至所述第二接入网设备。
其中，所述处理器1501、以及收发器1502所执行的具体步骤可参见上述方法实施例一至四中任一方法实施例中SMF网元涉及的步骤中的相关描述，这里不再详述。
上述通信装置1500还可以由逻辑单元来实现，图16示出了本申请实施例提供的一种通信装置1600的结构示意图，该装置1600包括处理模块1601、以及收发模块1602。其中，处理模块1601对应于上述通信装置1500中所述的处理器1501，收发模块1602对应于上述通信装置1500中所述的收发器1502，可分别用于实现上述方法实施例一至四中任一方法实施例中涉及的SMF网元的相应功能，具体实现过程可参照上述方法实施例一至四中任一方法实施例以及上述通信装置1500中的相关描述，这里不再赘述。
本申请实施例提供了另一种通信装置，所述通信装置具备实现上述方法实施例四中PCF网元的功能，比如，所述通信装置包括所述PCF网元执行上述方法实施例四涉及步骤所对应的模块或单元或手段(means)，所述功能或模块或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可通过硬件执行相应的软件实现。
图17示出了本申请实施例提供的一种通信装置1700的结构示意图，其中，所述装置1700包括处理器1701、以及收发器1702。其中，所述处理器1701被配置为支持PCF网元执行上述方法实施例四中涉及的功能。所述收发器1702被配置为支持PCF网元收发消息的功能。所述装置1700还可以包括存储器1703，其中，处理器1701、收发器1702和存储器1703相连，该存储器1703用于存储实现上述方法实施例四中涉及的PCF网元的功能所必要的计算机程序指令，该处理器1701用于执行该存储器1703存储的计算机程序指令，以控制收发器1702收发信号，完成上述方法实施例四中PCF网元执行相应功能的步骤。
具体的，所述处理器1701可以用于用所述收发器1702接收到SMF网元发送的第八信息，所述第八信息用于指示所述至少一个QoS flow由所述第一接入网设备切换至所述第二接入网设备。进而所述处理器1701可以确定所述至少一个QoS flow中所述通知控制状态为第一状态的QoS flow，并将确定出的QoS flow的通知控制状态更新为第二状态。其中，所述第一状态用于指示确定出的QoS flow的服务质量需求不能够被满足，所述第二状态用于指示确定出的QoS flow的服务质量需求能够被满足。
其中，所述处理器1701、以及收发器1702所执行的具体步骤可参见上述方法实施例四PCF网元涉及的步骤中的相关描述，这里不再详述。
上述通信装置1700还可以由逻辑单元来实现，图18示出了本申请实施例提供的一种通信装置1800的结构示意图，该装置1800包括处理模块1801、以及收发模块1802。其中，处理模块1801对应于上述通信装置1700中所述的处理器1701，收发模块1802对应于上述通信装置1700中所述的收发器1702，可分别用于实现上述方法实施例四涉及的PCF网元的相应功能，具体实现过程可参照上述方法实施例四以及上述通信装置1700中的相关描述，这里不再赘述。
可以理解的是，本申请实施例附图中仅仅示出了上述通信装置的简化设计。在实际应用中，上述通信装置并不限于上述结构，例如对于第一RAN设备或第二RAN设备来说，具体结构中还可以包括天线阵列，双工器以及基带处理部分等。
需要说明的是，本申请实施例上述涉及的处理器可以是中央处理器(central processing unit，CPU)，通用处理器，数字信号处理器(digital signal processor，DSP)，专用集成电路(application-specific integrated circuit，ASIC)，现场可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、晶体管逻辑器件、硬件 部件或者其任意组合。其可以实现或执行结合本申请公开内容所描述的各种示例性的逻辑方框，模块和电路。处理器也可以是实现计算功能的组合，例如包含一个或多个微处理器组合，DSP和微处理器的组合等等。其中，所述存储器可以集成在所述处理器中，也可以与所述处理器分开设置。
根据本申请实施例提供的方法，本申请实施例还提供一种通信系统，其包括上述的第一RAN设备、第二RAN设备、SMF网元以及PCF网元。
本申请实施例还提供一种芯片，所述芯片可以与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述方法实施例中所涉及的任意一种方法。
本申请实施例还提供一种计算机存储介质，所述计算机存储介质存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，可以完成上述方法实施例中所涉及的任意一种方法。
本申请实施例还提供一种包含软件程序的计算机程序产品，当其在计算机上运行时，使得计算机执行上述方法实施例所涉及的任意一种方法。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机指令的计算机可读存储介质(包括但不限于磁盘存储器、光学存储器等)上实施的计算机程序产品的形式。
以上实施例中，对本申请的目的、技术方法和有益效果进行了详细说明。应理解，以上所述仅为本申请的具体实施方式而已，本申请的保护范围并不限定于此。凡在本申请的技术方案的基础上所做出的任何修改和变型，均应包括在本申请的保护范围之内。

Claims (32)

  1. 一种通信方法，其特征在于，包括：
    在至少一个服务质量流由第一接入网设备切换至第二接入网设备的过程中，
    所述第一接入网设备向所述第二接入网设备发送第一信息，所述第一信息用于指示所述第一接入网设备已经通知核心网设备所述至少一个服务质量流的服务质量需求不能被满足。
  2. 如权利要求1所述的方法，其特征在于，所述第一信息中包括所述至少一个服务质量流的标识、以及所述至少一个服务质量流的通知控制状态，所述通知控制状态为第一状态，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足。
  3. 如权利要求1或2所述的方法，其特征在于，所述第一接入网设备向所述第二接入网设备发送第一信息，包括：
    所述第一接入网设备通过与所述第二接入网设备相连的接口，向所述第二接入网设备发送所述第一信息；或者，
    所述第一接入网设备通过接入和移动性管理功能AMF网元，向所述第二接入网设备发送所述第一信息。
  4. 一种通信方法，其特征在于，包括：
    第二接入网设备接收所述第一接入网设备发送的第一信息，所述第一信息用于指示所述第一接入网设备已经通知核心网设备至少一个服务质量流的服务质量需求不能被满足；
    当所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足时，所述第二接入网设备向所述核心网设备发送第二信息，所述第二信息用于通知所述核心网设备所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足，其中，所述第一服务质量流为已经由所述第一接入网设备切换至所述第二接入网设备的服务质量流。
  5. 如权利要求4所述的方法，其特征在于，所述方法还包括：
    所述第二接入网设备在检测到所述第一服务质量流的服务质量需求不能被满足时，向所述核心网设备发送第三信息，所述第三信息用于通知所述核心网设备所述第一服务质量流的服务质量需不能够被满足。
  6. 一种通信方法，其特征在于，包括：
    当至少一个服务质量流已经由第一接入网设备切换至所述第二接入网设备时，
    所述第二接入网设备向核心网设备发送第四信息，所述第四信息用于通知所述核心网设备所述至少一个服务质量流的服务质量需求能够被满足。
  7. 如权利要求6所述的方法，其特征在于，所述至少一个服务质量流为已经由所述第一接入网设备切换至所述第二接入网设备、且需要进行通知控制的所有服务质量流。
  8. 一种通信方法，其特征在于，包括：
    会话管理功能SMF网元接收第二接入网设备发送的至少一个服务质量流的通知控制状态，所述至少一个服务质量流为已经由第一接入网设备切换至所述第二接入网 设备的服务质量流，所述通知控制状态为第二状态，所述第二状态用于指示所述至少一个服务质量流的服务质量需求能够被满足；
    所述SMF网元向策略控制功能PCF网元发送第五信息，所述第五信息用于通知所述PCF网元所述至少一个服务质量流的服务质量需求能够被满足。
  9. 如权利要求8所述的方法，其特征在于，所述方法还包括：
    所述SMF网元向所述PCF网元发送所述第五信息之前，所述SMF网元确定接收的所述第一接入网设备发送的所述至少一个服务质量流的通知控制状态为第一状态，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足。
  10. 一种通信方法，其特征在于，包括：
    会话管理功能SMF网元确定接收的第一接入网设备发送的至少一个服务质量流的通知控制状态；
    当所述至少一个服务质量流中的第二服务质量流已经由所述第一接入网设备切换至第二接入网设备时，所述SMF网元确定所述第二服务质量流中所述通知控制状态为第一状态的第三服务质量流；
    所述SMF网元将所述第三服务质量流的所述通知控制状态更新为第二状态，并向策略控制功能PCF网元发送第六信息，所述第六信息用于通知所述PCF网元所述第三服务质量流的所述通知控制状态为第二状态；
    其中，所述第一状态用于指示所述第三服务质量流的服务质量需求不能够被满足，所述第二状态用于指示所述第三服务质量流的服务质量需求能够被满足。
  11. 如权利要求10所述的方法，其特征在于，所述方法还包括：
    所述SMF网元接收接入和移动性管理功能AMF网元发送的第七信息，所述第七信息包括已经由所述第一接入网设备切换至所述第二接入网设备的所述第二服务质量流的标识。
  12. 一种通信装置，其特征在于，包括：处理模块、收发模块；
    所述处理模块，用于在至少一个服务质量流由所述通信装置切换至第二接入网设备的过程中，用所述收发模块向所述第二接入网设备发送第一信息，所述第一信息用于指示所述通信装置已经通知核心网设备所述至少一个服务质量流的服务质量需求不能被满足。
  13. 如权利要求12所述的装置，其特征在于，所述第一信息中包括所述至少一个服务质量流的标识、以及所述至少一个服务质量流的通知控制状态，所述通知控制状态为第一状态，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足。
  14. 如权利要求12或13所述的装置，其特征在于，所述处理模块，具体用于：
    用所述收发模块通过与所述第二接入网设备相连的接口向所述第二接入网设备发送所述第一信息；或者，
    用所述收发模块通过接入和移动性管理功能AMF网元向所述第二接入网设备发送所述第一信息。
  15. 一种通信装置，其特征在于，包括：处理模块、收发模块；
    所述处理模块，用于用所述收发模块接收所述第一接入网设备发送的第一信息， 所述第一信息用于指示所述第一接入网设备已经通知核心网设备至少一个服务质量流的服务质量需求不能被满足；
    所述处理模块，还用于当所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足时，用所述收发模块向所述核心网设备发送第二信息，所述第二信息用于通知所述核心网设备所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足，其中，所述第一服务质量流为已经由所述第一接入网设备切换至所述通信装置的服务质量流。
  16. 如权利要求15所述的装置，其特征在于，所述处理模块，还用于：
    在检测到所述第一服务质量流的服务质量需求不能被满足时，用所述收发模块向所述核心网设备发送第三信息，所述第三信息用于通知所述核心网设备所述第一服务质量流的服务质量需不能够被满足。
  17. 一种通信装置，其特征在于，包括：处理模块、收发模块；
    当至少一个服务质量流已经由第一接入网设备切换至所述通信装置时，
    所述处理模块，用于用所述收发模块向核心网设备发送第四信息，所述第四信息用于通知所述核心网设备所述至少一个服务质量流的服务质量需求能够被满足。
  18. 如权利要求17所述的装置，其特征在于，所述至少一个服务质量流为已经由所述第一接入网设备切换至所述第二接入网设备、且需要进行通知控制的所有服务质量流。
  19. 一种通信装置，其特征在于，包括：处理模块、收发模块；
    所述处理模块，用于用所述收发模块接收第二接入网设备发送的至少一个服务质量流的通知控制状态，所述至少一个服务质量流为已经由第一接入网设备切换至所述第二接入网设备的服务质量流，所述通知控制状态为第二状态，所述第二状态用于指示所述至少一个服务质量流的服务质量需求能够被满足；
    所述处理模块，还用于用所述收发模块向策略控制功能PCF网元发送第五信息，所述第五信息用于通知所述PCF网元所述至少一个服务质量流的服务质量需求能够被满足。
  20. 如权利要求19所述的装置，其特征在于，所述处理模块，还用于：
    在用所述收发模块向所述PCF网元发送所述第五信息之前，所述处理模块确定接收的所述第一接入网设备发送的所述至少一个服务质量流的通知控制状态为第一状态，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足。
  21. 一种通信装置，其特征在于，包括：处理模块、收发模块；
    所述处理模块，用于确定接收的第一接入网设备发送的至少一个服务质量流的通知控制状态；
    所述处理模块，还用于当所述至少一个服务质量流中的第二服务质量流已经由所述第一接入网设备切换至第二接入网设备时，确定所述第二服务质量流中所述通知控制状态为第一状态的第三服务质量流；
    所述处理模块，还用于将所述第三服务质量流的所述通知控制状态更新为第二状态，并用所述收发模块向策略控制功能PCF网元发送第六信息，所述第六信息用于通知所述PCF网元所述第三服务质量流的所述通知控制状态为第二状态；
    其中，所述第一状态用于指示所述至少一个服务质量流的服务质量需求不能够被满足，所述第二状态用于指示所述至少一个服务质量流的服务质量需求能够被满足。
  22. 如权利要求21所述的装置，其特征在于，所述处理模块，还用于：
    用所述收发模块接收到接入和移动性管理功能AMF网元发送的第七信息，所述第七信息包括已经由所述第一接入网设备切换至所述第二接入网设备的所述第二服务质量流的标识。
  23. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1-3中任意一项所述的方法，或使得所述计算机执行如权利要求4-5任一所述的方法，或使得所述计算机执行如权利要求6-7任一所述的方法，或使得所述计算机执行如权利要求8-9任一所述的方法，或使得所述计算机执行如权利要求10-11任一所述的方法。
  24. 一种芯片系统，其特征在于，所述芯片系统包括：
    存储器：用于存储指令；
    处理器，用于从所述存储器中调用并运行所述指令，使得安装有所述芯片系统的通信设备执行如权利要求1-3中任意一项所述的方法，或使得所述通信设备执行如权利要求4-5任一所述的方法，或使得所述通信设备执行如权利要求6-7任一所述的方法，或使得所述通信设备执行如权利要求8-9任一所述的方法，或使得所述通信设备执行如权利要求10-11任一所述的方法。
  25. 一种计算机程序产品，所述计算机程序产品包括计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行如权利要求1-3中任意一项所述的方法，或使得所述计算机执行如权利要求4-5任一所述的方法，或使得所述计算机执行如权利要求6-7任一所述的方法，或使得所述计算机执行如权利要求8-9任一所述的方法，或使得所述计算机执行如权利要求10-11任一所述的方法。
  26. 一种通信系统，所述系统包括：第一接入网设备和第一接入网设备；
    在至少一个服务质量流由所述第一接入网设备切换至所述第二接入网设备的过程中，所述第一接入网设备用于向所述第二接入网设备发送第一信息，所述第一信息用于指示所述第一接入网设备已经通知核心网设备所述至少一个服务质量流的服务质量需求不能被满足；
    所述第二接入网设备用于接收所述第一接入网设备发送的所述第一信息；所述第二接入网设备还用于向所述核心网设备发送第二信息，所述第二信息用于通知所述核心网设备所述至少一个服务质量流中第一服务质量流的服务质量需求能够被满足，其中，所述第一服务质量流为已经由所述第一接入网设备切换至所述第二接入网设备的服务质量流。
  27. 根据权利要求26所述的通信系统，其特征在于，所述系统还包括核心网设备，所述核心网设备用于接收所述第二信息。
  28. 根据权利要求26或27所述的通信系统，其特征在于，所述第二接入网设备在检测到所述第一服务质量流的服务质量需求不能被满足时，所述第二接入网设备还用于向所述核心网设备发送第三信息，所述第三信息用于通知所述核心网设备所述第一服务质量流的服务质量需不能够被满足。
  29. 一种通信系统，所述系统包括：会话管理功能SMF网元和策略控制功能PCF网元；
    所述SMF网元用于确定接收的第一接入网设备发送的至少一个服务质量流的通知控制状态；
    当所述至少一个服务质量流中的第二服务质量流已经由所述第一接入网设备切换至第二接入网设备时，所述SMF网元确定所述第二服务质量流中所述通知控制状态为第一状态的第三服务质量流；
    所述SMF网元还用于将所述第三服务质量流的所述通知控制状态更新为第二状态，并用于向所述PCF网元发送第六信息，所述第六信息用于通知所述PCF网元所述第三服务质量流的所述通知控制状态为第二状态；
    其中，所述第一状态用于指示所述第三服务质量流的服务质量需求不能够被满足，所述第二状态用于指示所述第三服务质量流的服务质量需求能够被满足；
    所述PCF网元用于接收所述第六信息。
  30. 根据权利要求29所述的通信系统，其特征在于，所述通信系统还包括接入和移动性管理功能AMF网元；所述AMF网元用于发送第七信息；
    所述SMF网元用于接收所述AMF网元发送的所述第七信息，所述第七信息包括已经由所述第一接入网设备切换至所述第二接入网设备的所述第二服务质量流的标识。
  31. 一种通信方法，其特征在于，包括：通信接口和至少一个处理器，所述通信接口和所述至少一个处理器通过线路互联，所述通信接口用于执行权利要求1到3任一项所述的方法中，或用于执行权利要求4到5任一项所述的方法中，或用于执行权利要求6到7任一项所述的方法中，或用于执行权利要求8到9任一项所述的方法中，或用于执行权利要求10到11任一项所述的方法中，在所述装置侧进行消息接收和发送的操作；
    所述至少一个处理器调用指令，执行权利要求1到3任一项所述的方法中，或用于执行权利要求4到5任一项所述的方法中，或用于执行权利要求6到7任一项所述的方法中，或用于执行权利要求8到9任一项所述的方法中，或用于执行权利要求10到11任一项所述的方法中，在所述装置进行的消息处理或控制操作。
  32. 一种传输信息的装置，用于执行权利要求1到3任一项所述的方法，或用于执行权利要求4到5任一项所述的方法，或用于执行权利要求6到7任一项所述的方法，或用于执行权利要求8到9任一项所述的方法，或用于执行权利要求10到11任一项所述的方法。
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