WO2018171468A1 - Eps承载标识的分配方法、装置、smf及pcf - Google Patents

Eps承载标识的分配方法、装置、smf及pcf Download PDF

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Publication number
WO2018171468A1
WO2018171468A1 PCT/CN2018/078841 CN2018078841W WO2018171468A1 WO 2018171468 A1 WO2018171468 A1 WO 2018171468A1 CN 2018078841 W CN2018078841 W CN 2018078841W WO 2018171468 A1 WO2018171468 A1 WO 2018171468A1
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Prior art keywords
eps bearer
eps
mapping
bearer
identifier
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PCT/CN2018/078841
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English (en)
French (fr)
Inventor
王胡成
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电信科学技术研究院有限公司
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Priority to EP18770557.9A priority Critical patent/EP3606120B1/en
Priority to JP2019552270A priority patent/JP6928775B2/ja
Priority to US16/495,610 priority patent/US11265768B2/en
Priority to KR1020197030361A priority patent/KR20190126885A/ko
Publication of WO2018171468A1 publication Critical patent/WO2018171468A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1403—Architecture for metering, charging or billing
    • H04L12/1407—Policy-and-charging control [PCC] architecture
    • 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]
    • 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
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method, an apparatus, an SMF, and a PCF for allocating an EPS bearer identifier.
  • the 5G network needs to support interoperability with the Long Term Evolution (LTE) network of the universal mobile communication technology, one of which is through interoperability.
  • LTE Long Term Evolution
  • the inter-system inter-RAT (inter-radio access technology) handover between the 5G network and the LTE network is completed.
  • the session of the 5G network is identified by a Packet Data Unit (PDU) session identification PDU session ID, and the session in the LTE network is carried by an Evolved Packet System (EPS) bearer identifier EPS bearer ID. Identification, so when performing inter-RAT handover, it is necessary to consider the identification problem of the same session in different networks.
  • PDU Packet Data Unit
  • EPS Evolved Packet System
  • the Mobility Management Entity in the LTE network and the Access Management Function (Authentication Management Function) in the 5G network.
  • the Nx interface between AMF is optional.
  • the network can support the handover between the 5G network and the LTE network.
  • the context information of the terminal UE needs to be transmitted between the MME and the AMF, including the mobility context and the context of the session connection.
  • the network may configure its registration mode to a single registration mode, that is, single registration mode.
  • the switch When the network does not support the Nx interface, the switch does not support the connection between the 5G network and the LTE network.
  • the network In order to support interoperability, the network needs to require the UE to perform dual registration mode, that is, keep registering on the LTE network and the 5G network.
  • the session management function (SMF) of the control plane in the network is required to support the function of the PGW-C at the same time, so that the "HO registration" can ensure that the UE is in the UE.
  • SMF session management function
  • the UE in the dual registration mode can be further divided into a single broadcast capability and a dual broadcast capability.
  • a single-broadcast UE can only maintain one-side session connection at the same time, that is, keep the connection in the LTE network or stay connected in the 5G network, so that if the UE moves between the LTE network and the 5G network, it will inevitably The emergence of packet loss does not guarantee seamless business continuity.
  • the dual-broadcast UE can maintain the connection at the same time in the LTE network and the 5G network. Therefore, when moving between networks, the connection can be switched in a make-before-break manner, that is, receiving data from the target network. At the same time, data is still received from the source network, so that the connection of the service can be guaranteed.
  • the handover process of the UE from the 5G network to the LTE network in the single registration mode is mainly:
  • the AMF After receiving the handover request of the access network (RAN), the AMF requests all SMFs to perform mapping of the PDU session context; after the SMF converts the PDU session context to the EPS bearer context, the SMF returns the EPS bearer context to the AMF.
  • the non-GBR quality of service data flow QoS flows are mapped to the default bearer default bearer, and the GBR QoS flows are mapped to the dedicated bearer dedicated bearer;
  • the AMF After receiving the EPS bearer context returned by all SMFs, the AMF generates a UE context in combination with the mobility context of the UE, and transmits the UE context to the MME through the Nx interface;
  • the target MME regards the Nx interface as an S10 interface, that is, the AMF is regarded as an MME, and after receiving the UE context from the Nx interface, the target MME continues the subsequent process according to the S1 handover procedure of the related EPS system;
  • the dedicated bearer activation process may be initiated to establish a dedicated bearer for some non-GRB QoS flows.
  • the related protocol describes that the SMF needs to map the PDU session context and the EPS bearer context.
  • the PDU session is identified by the PDU session ID, and the PDU session ID is allocated by the UE.
  • the problem of how to assign the bearer identity of the EPS bearer has not been resolved.
  • the present disclosure provides a method, an apparatus, an SMF, and a PCF for allocating an EPS bearer identifier.
  • the present disclosure provides a method for allocating an EPS bearer identifier, which is applied to a session management function body SMF, including: mapping a session connection to an evolved packet system EPS bearer; and requesting the terminal UE or access and mobility management functions
  • the main body AMF allocates a bearer identifier for the EPS bearer generated by the mapping.
  • the step of requesting the terminal UE or the authentication management function main body AMF to allocate the bearer identifier to the EPS bearer generated by the mapping includes: sending a first message to the UE, requesting the UE to allocate a bearer identifier for the EPS bearer generated by the mapping, Transmitting, by the first message, the EPS bearer information generated by the mapping; or sending the second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the EPS bearer generated by the mapping The number of information or EPS bearers.
  • the EPS bearer identifier of the dedicated bearer in the EPS bearer information is temporarily set to a null value, a temporary value, or a reserved value.
  • the EPS bearer identifier of the default bearer in the EPS bearer information is set to be a packet data unit PDU session identifier or is temporarily set as a PDU session identifier.
  • the EPS bearer information carries a mapping relationship between the EPS bearer and the QoS flow of the QoS data flow, or a mapping relationship between the EPS bearer and the service flow template TFT.
  • the number of EPS bearers is the number of dedicated bearers.
  • the first message is a PDU session establishment accept message.
  • the allocating method before the step of sending the second message to the AMF, the allocating method further includes: receiving a PDU session establishment request message sent by the UE; or receiving an EPS bearer context request message sent by the AMF.
  • the allocating method further includes: receiving, by the UE or the AMF, a bearer identifier allocated for the EPS bearer generated by the mapping; and determining an EPS bearer context according to the bearer identifier and the EPS bearer information generated by the mapping. Or parameter information of related EPS bearers.
  • the AMF allocates a bearer identifier to the EPS bearer generated by the mapping, where the method further includes: notifying the UE of the EPS bearer context or parameter information of the related EPS bearer.
  • the present disclosure further provides a method for allocating an EPS bearer identifier, which is applied to a policy control and charging system PCC or a policy control function body PCF, including: determining to map a quality of service QoS parameter of a session connection to an evolved packet system The QoS parameter of the EPS is determined according to the EPS QoS parameter of the mapping, and the EPS bearer generated by the mapping is determined; and the EPS bearer identifier is allocated for the EPS bearer generated by the mapping.
  • the allocating method further includes: sending the EPS bearer information generated by the mapping to the SMF, where the EPS bearer information includes the EPS bearer identifier and the QoS parameter of the EPS bearer.
  • the step of determining to map the quality of service QoS parameter of the session connection to the QoS parameter of the evolved packet system EPS comprises: determining to connect the session according to a type of the session management function body SMF serving the session connection The QoS parameter is mapped to the QoS parameter of the EPS; or the QoS parameter for mapping the session connection is mapped to the QoS parameter of the EPS according to the request of the SMF that serves the session connection.
  • the type of the SMF is: an SMF that supports the 5G session management function and the EPS packet data network gateway to control the PGW-C function.
  • the present disclosure further provides an apparatus for allocating an EPS bearer identifier, which is applied to a session management function body SMF, including: a mapping module, configured to map a session connection to an evolved packet system EPS bearer; and a request module, configured to: The requesting terminal UE or the access and mobility management function body AMF allocates a bearer identifier for the EPS bearer generated by the mapping.
  • a mapping module configured to map a session connection to an evolved packet system EPS bearer
  • a request module configured to: The requesting terminal UE or the access and mobility management function body AMF allocates a bearer identifier for the EPS bearer generated by the mapping.
  • the requesting module includes: a first sending unit, configured to send a first message to the UE, requesting the UE to allocate a bearer identifier for the EPS bearer generated by the mapping, where the first message carries a mapping generated
  • the second sending unit is configured to send a second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the EPS bearer information or EPS generated by the mapping.
  • the number of bearers configured to send a first message to the UE, requesting the UE to allocate a bearer identifier for the EPS bearer generated by the mapping, where the first message carries a mapping generated
  • the second sending unit is configured to send a second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the EPS bearer information or EPS generated by the mapping.
  • the EPS bearer identifier of the dedicated bearer in the EPS bearer information is temporarily set to a null value, a temporary value, or a reserved value.
  • the EPS bearer identifier of the default bearer in the EPS bearer information is set to be a packet data unit PDU session identifier or is temporarily set as a PDU session identifier.
  • the EPS bearer information carries a mapping relationship between the EPS bearer and the QoS flow of the QoS data flow, or a mapping relationship between the EPS bearer and the service flow template TFT.
  • the number of EPS bearers is the number of dedicated bearers.
  • the first message is a PDU session establishment accept message.
  • the allocating device further includes: a first receiving module, configured to receive a PDU session establishment request message sent by the UE; or receive an EPS bearer context request message sent by the AMF.
  • a first receiving module configured to receive a PDU session establishment request message sent by the UE; or receive an EPS bearer context request message sent by the AMF.
  • the allocating device further includes: a second receiving module, configured to receive a bearer identifier that is allocated by the UE or the AMF and that is allocated by using the EPS bearer generated by the mapping; and a first determining module, configured to The bearer identifier and the EPS bearer information generated by the mapping are determined, and the parameter information of the EPS bearer context or the related EPS bearer is determined.
  • a second receiving module configured to receive a bearer identifier that is allocated by the UE or the AMF and that is allocated by using the EPS bearer generated by the mapping
  • a first determining module configured to The bearer identifier and the EPS bearer information generated by the mapping are determined, and the parameter information of the EPS bearer context or the related EPS bearer is determined.
  • the AMF allocates a bearer identifier to the EPS bearer generated by the mapping, and further includes: a notification module, configured to notify the UE of the EPS bearer context or parameter information of the related EPS bearer.
  • the present disclosure further provides an apparatus for allocating an EPS bearer identifier, which is applied to a policy control and charging system PCC or a policy control function body PCF, and includes: a second determining module, configured to determine a quality of service for connecting the session The QoS parameter is mapped to the QoS parameter of the evolved packet system EPS; the third determining module is configured to determine the EPS bearer generated by the mapping according to the EPS QoS parameter of the mapping, and the allocation module, configured to allocate the EPS for the EPS bearer generated by the mapping Bearer ID.
  • a second determining module configured to determine a quality of service for connecting the session The QoS parameter is mapped to the QoS parameter of the evolved packet system EPS
  • the third determining module is configured to determine the EPS bearer generated by the mapping according to the EPS QoS parameter of the mapping
  • the allocation module configured to allocate the EPS for the EPS bearer generated by the mapping Bearer ID.
  • the allocating device further includes: a sending module, configured to send the mapped EPS bearer information to the SMF, where the EPS bearer information includes the EPS bearer identifier and the QoS parameter of the EPS bearer.
  • a sending module configured to send the mapped EPS bearer information to the SMF, where the EPS bearer information includes the EPS bearer identifier and the QoS parameter of the EPS bearer.
  • the second determining module is specifically configured to: determine, according to a type of the session management function body SMF that serves the session connection, to map the QoS parameter of the session connection to a QoS parameter of the EPS; or according to the service
  • the SMF request of the session connection determines to map the QoS parameters of the session connection to the QoS parameters of the EPS.
  • the type of the SMF is: an SMF that supports the 5G session management function and the EPS packet data network gateway to control the PGW-C function.
  • the present disclosure further provides an SMF, including a first memory, a first processor, and a computer program stored on the first memory and executable on the first processor, the first The steps in the allocation method applied to the SMF of the first aspect described above are implemented when the processor executes the computer program.
  • the present disclosure further provides a PCF, including a second memory, a second processor, and a computer program stored on the second memory and operable on the second processor, the second The steps in the method of assigning the PCF to the second aspect described above are implemented when the processor executes the computer program.
  • the present disclosure also provides a non-volatile storage medium comprising: programs and instructions stored on the non-volatile storage medium, wherein when the programs and instructions are executed by a processor, The processor implements the steps in the allocation method applied to the SMF of the first aspect described above.
  • the present disclosure also provides a non-volatile storage medium comprising: programs and instructions stored on the non-volatile storage medium, wherein when the programs and instructions are executed by a processor, The processor implements the steps in the method of assigning the PCF to the second aspect described above.
  • the method for allocating the EPS bearer identifier of the present disclosure by mapping the session connection to the EPS bearer, requesting the UE or the AMF to allocate the bearer identifier for the EPS bearer generated by the mapping, which can be generated for the mapping when the session connection to the EPS bearer is mapped.
  • the EPS bearer allocates bearer identifiers, thereby achieving normal operation of inter-system handover between the 5G network and the LTE network.
  • FIG. 1 is a flow chart showing a method for allocating an EPS bearer identifier of the present disclosure
  • FIG. 2 is a flow chart showing a method for allocating an EPS bearer identifier of the present disclosure
  • FIG. 3 is a flow chart showing another method for allocating an EPS bearer identifier of the present disclosure
  • FIG. 4 is a flow chart showing an example 1 of an allocation process of an EPS bearer identifier of the present disclosure
  • FIG. 5 is a flow chart showing an example 2 of an allocation process of an EPS bearer identifier of the present disclosure
  • FIG. 6 is a flow chart showing an example 3 of an allocation process of an EPS bearer identifier of the present disclosure
  • FIG. 7 is a flowchart showing a method of allocating an EPS bearer identifier of the present disclosure
  • FIG. 8 is a flow chart showing a specific example of an allocation process of an EPS bearer identifier of the present disclosure
  • FIG. 9 is a flowchart showing a method for allocating an EPS bearer identifier of the present disclosure.
  • Figure 10 is a block diagram showing the structure of the distribution device of the EPS bearer identification of the present disclosure.
  • Figure 11 is a block diagram showing the structure of the distribution device of the EPS bearer identification of the present disclosure.
  • Figure 12 is a block diagram showing the structure of the SMF of the present disclosure.
  • Fig. 13 is a view showing the structure of a PCF of the present disclosure.
  • the embodiment of the present disclosure provides an EPS bearer.
  • the method, the device, and the session management function (SMF) of the identifier are used to request a user equipment (User Equipment, UE) or a mobility management function body (Authentication Management) when performing session mapping to the EPS bearer.
  • UE User Equipment
  • Authentication Management Authentication Management
  • AMF allocates a bearer identifier for the EPS bearer generated by the mapping, and can implement a bearer identifier for the EPS bearer generated by the mapping when the session is connected to the EPS bearer, thereby implementing the fifth generation mobile communication system (5Generation, referred to as 5G)
  • 5G fifth generation mobile communication system
  • 5G The normal operation of inter-system handover between the network and the Long Term Evolution (LTE) network.
  • FIG. 1 is a flowchart of a method for allocating an EPS bearer identifier of the present disclosure.
  • the method for allocating the EPS bearer identifier provided in this embodiment is applied to the SMF, and includes the following steps 101 to 102, which are described in detail below.
  • Step 101 Map the session connection to the EPS bearer.
  • the session connection may be a session connection of a 5G system, that is, a 5G session connection or a PDU session connection.
  • the SMF may map the related session connection to the EPS bearer, that is, perform mapping of the session connection to the EPS bearer.
  • the mapping of the SMF to the PDU session connection to the EPS bearer may be specifically: mapping the non-GBR QoS flows in the PDU session to a default bearer, and the default bearer is
  • the EPS bearer identifier is set to the PDU session identifier or temporarily set to the PDU session identifier; all GBR QoS flows in the PDU session are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the associated EPS bearer identifiers of all the dedicated bearers are Set the PDU session ID to temporarily set the EPS bearer ID of all dedicated bearers to null, temporary, or reserved. If the value of the PDU session ID is not within 5 to 15 or because of network configuration or policy requirements, If the EPS bearer identifier is set to a temporary value, the associated EPS bearer identifier may be re-allocated by the UE.
  • mapping rule in the present disclosure may be determined by an implementation of the SMF or an operator's policy, which is not limited by the disclosure.
  • Step 102 The UE or the AMF is requested to allocate a bearer identifier for the EPS bearer generated by the mapping.
  • the SMF may request the UE or the AMF to allocate the bearer identifier for the EPS bearer generated by the mapping, or request the AMF to uniformly allocate the EPS bearer generated by the mapping. Carrying the logo, depending on the situation.
  • the SMF needs to know the EPS bearer context after the mapping is completed, and the final acquisition of the EPS bearer context is based on the EPS bearer generated by the mapped bearer identifier pair mapping.
  • the information is processed, for example, the EPS-specific bearer identifier of the temporary setting is updated.
  • the context of the EPS bearer may specifically include identification information of each bearer, tunnel endpoint information of the bearer, and QoS parameters of the bearer.
  • the allocation method further includes steps 103-104.
  • Step 103 Receive a bearer identifier that is allocated by the UE or the AMF and is allocated for the EPS bearer generated by the mapping.
  • Step 104 Determine, according to the bearer identifier and the EPS bearer information generated by the mapping, the parameter information of the EPS bearer context or the related EPS bearer.
  • the SMF may notify the UE of the EPS bearer context or related to ensure that the UE obtains the relevant EPS bearer information in time. Parameter information carried by the EPS. And, the SMF can also send the EPS bearer context to the AMF.
  • the SMF may also send the EPS generated by the mapping to the access network side base station node. Bearer assigned bearer ID.
  • the method for allocating the EPS bearer identifier of the embodiment of the present disclosure by mapping the session connection to the EPS bearer, requesting the UE or the AMF to allocate the bearer identifier for the EPS bearer generated by the mapping, which can implement the mapping of the session connection to the EPS bearer.
  • the bearer identifier is allocated for the EPS bearer generated by the mapping, thereby realizing the normal work of the inter-system handover between the 5G network and the LTE network.
  • the foregoing embodiment describes a basic implementation process of the method for allocating the EPS bearer identifier of the present disclosure. Some specific implementation processes of the method for allocating the EPS bearer identifier of the present disclosure are described below.
  • FIG. 2 is a flowchart of a method for allocating an EPS bearer identifier of the present disclosure.
  • the method for allocating the EPS bearer identifier provided by this embodiment of the present disclosure is applied to the SMF, and includes the following steps 201 to 202, which are described in detail below.
  • Step 201 Map the session connection to the EPS bearer.
  • the session connection may be a session connection of a 5G system, that is, a 5G session connection or a PDU session connection.
  • the SMF may map the related session connection to the EPS bearer, that is, perform mapping of the session connection to the EPS bearer.
  • the mapping of the SMF to the PDU session connection to the EPS bearer may be specifically: mapping the non-GBR QoS flows in the PDU session to a default bearer, and the default bearer is The EPS bearer identifier is set to the PDU session identifier or temporarily set to the PDU session identifier; all GBR QoS flows in the PDU session are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the associated EPS bearer identifiers of all the dedicated bearers are Set the PDU session ID to temporarily set the EPS bearer ID of all dedicated bearers to null, temporary, or reserved.
  • the EPS bearer identifier is determined to be a temporary value, and then the associated EPS bearer identifier may be re-allocated by the UE.
  • mapping rule of the present disclosure may be determined by an implementation of the SMF or an operator's policy, which is not limited by the disclosure.
  • Step 202 Send a first message to the UE, requesting the UE to allocate a bearer identifier for the EPS bearer generated by the mapping, where the first message carries the EPS bearer information generated by the mapping.
  • the first message is, for example, a PDU session establishment accept message.
  • the EPS bearer identifier of the dedicated bearer in the EPS bearer information is temporarily set to a null value, a temporary value, or a reserved value.
  • the EPS bearer identifier of the default bearer in the EPS bearer information is set to be a packet data unit PDU session identifier or temporarily set as a PDU session identifier.
  • the UE may allocate the bearer identifier according to the QoS flow ID (QFI) or the service flow template TFT as the EPS bearer generated by the mapping. Therefore, the EPS bearer information sent by the SMF to the UE may carry the mapping relationship between the EPS bearer and the QoS flow, or carry the mapping relationship between the EPS bearer and the TFT.
  • QFI QoS flow ID
  • TFT service flow template
  • FIG. 3 is a flowchart of another method for allocating an EPS bearer identifier of the present disclosure.
  • This embodiment of the present disclosure provides another method for allocating an EPS bearer identifier, which is applied to the SMF, and includes the following steps 301 to 302, which are described in detail below.
  • Step 301 Map the session connection to the EPS bearer.
  • the session connection may be a session connection of a 5G system, that is, a 5G session connection or a PDU session connection.
  • the SMF may map the related session connection to the EPS bearer, that is, perform mapping of the session connection to the EPS bearer.
  • the SMF performs the mapping of the PDU session connection to the EPS bearer, which may be: mapping the non-GBR QoS flows in the PDU session to a default bearer, and the EPS of the default bearer is
  • the bearer identifier is set to the PDU session identifier or temporarily set to the PDU session identifier; all GBR QoS flows in the PDU session are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the associated EPS bearer identifiers of all the dedicated bearers are set.
  • the EPS bearer identifier of all dedicated bearers is temporarily set to a null value, a temporary value, or a reserved value, and if the value of the PDU session identifier is not within 5-15 or because the network configuration or policy requires, the EPS needs to be associated. If the bearer identifier is determined to be a temporary value, the associated EPS bearer identifier may be re-allocated by the UE.
  • Step 302 Send a second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the EPS bearer information generated by the mapping.
  • the SMF may also receive a PDU session establishment request message sent by the UE before sending the second message to the AMF.
  • the EPS bearer identifier of the dedicated bearer in the EPS bearer information is temporarily set to a null value, a temporary value, or a reserved value.
  • the EPS bearer identifier of the default bearer in the EPS bearer information is set to be a packet data unit PDU session identifier or temporarily set as a PDU session identifier.
  • the AMF may allocate the bearer identifier to the EPS bearer generated by the mapping according to the QoS flow ID (QFI). Therefore, the EPS bearer information sent by the SMF to the UE may carry a mapping relationship between the EPS bearer and the QoS flow.
  • QFI QoS flow ID
  • FIG. 4 is a flow chart showing an example 1 of the allocation process of the EPS bearer identification of the present disclosure.
  • the UE is assigned an EPS bearer identifier according to the QFI.
  • the process of allocating the EPS bearer identifier in the first instance includes the following steps 41-48.
  • Step 41 The UE sends a PDU Session Establishment Request message PDU Session Establishment Request to the AMF.
  • Step 42 After receiving the PDU Session Establishment Request sent by the UE, the AMF sends a session management request message SM Request to the SMF.
  • Step 43 After receiving the SM Request, the SMF maps the non-GBR QoS flows in the corresponding PDU session to a default bearer, and sets the EPS bearer identifier of the default bearer to the PDU session identifier or temporarily sets the PDU session identifier. All GBR QoS flows in the corresponding PDU session are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the EPS bearer identifier of each dedicated bearer is temporarily set to a null value, a temporary value, or a reserved value.
  • Step 44 The SMF returns a session management response message SM Response to the AMF, where the SM Response carries a PDU Session Establishment Accept message PDU Session Establishment Accept, and the PDU Session Establishment Accept includes the EPS bearer information generated by the mapping, where the EPS bearer information includes a default bearer identifier.
  • Step 45 The AMF sends a PDU Session Establishment Accept to the UE.
  • Step 46 The UE allocates an EPS bearer identifier for each dedicated bearer according to the EPS bearer information in the received PDU Session Establishment Accept, including the linked EPS bearer ID, the QFI, and the like.
  • Step 47 The UE returns a PDU session establishment confirmation message PDU Session Establishment Complete to the AMF, and the EPS bearer information is completed in the PDU Session Establishment Complete (updated to the temporary setting value), as shown in Table 2 below.
  • Step 48 The AMF returns a session management confirmation message SM Complete to the SMF, where the SM Complete carries the EPS bearer information of the PDU session mapping completion.
  • FIG. 5 is a flow chart showing an example 2 of the allocation process of the EPS bearer identification of the present disclosure. Referring to FIG. 5, the process of allocating the EPS bearer identifier in the second embodiment includes the following steps 51-58.
  • Step 51 The UE sends a PDU session establishment request message PDU Session Establishment Request to the AMF.
  • Step 52 After receiving the PDU Session Establishment Request sent by the UE, the AMF sends a session management request message SM Request to the SMF.
  • Step 53 After receiving the SM Request, the SMF maps the non-GBR QoS flows in the corresponding PDU session to a default bearer, and sets the EPS bearer identifier of the default bearer to the PDU session identifier or temporarily sets the PDU session identifier. All GBR QoS flows in the corresponding PDU session are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the EPS bearer identifier of each dedicated bearer is temporarily set to a null value, a temporary value, or a reserved value.
  • Step 54 The SMF returns a session management response message SM Response to the AMF, where the SM Response carries a PDU session establishment accept message PDU Session Establishment Accept, and the PDU Session Establishment Accept includes the EPS bearer information generated by the mapping, where the EPS bearer information includes a default bearer identifier.
  • Step 55 The AMF sends a PDU Session Establishment Accept to the UE.
  • Step 56 The UE allocates an EPS bearer identifier for each dedicated bearer according to the EPS bearer information in the received PDU Session Establishment Accept, including the linked EPS bearer ID, the TFT, and the like.
  • Step 57 The UE returns a PDU session establishment confirmation message PDU Session Establishment Complete to the AMF, and the EPS bearer information is completed in the PDU Session Establishment Complete (updated to the temporary setting value), as shown in Table 4 below.
  • Step 58 The AMF returns a session management confirmation message SM Complete to the SMF, where the SM Complete carries the EPS bearer information of the PDU session mapping completion.
  • the foregoing example 1 is similar to the second embodiment except that the related information of the EPS bearer in the first instance includes the QFI, so that the UE allocates the EPS bearer identifier according to the QFI, and the related information of the EPS bearer in the second instance includes the TFT, so that the UE The EPS bearer identifier is assigned according to the TFT.
  • the EPS bearer identifier is allocated by the UE, but the EPS bearer identifier may be allocated by the AMF, as in the third example. Since the role of the AMF is changed to the MME in the interworking scenario of the 5G network and the LTE network, the AMF can also allocate the EPS bearer identifier.
  • FIG. 6 is a flowchart showing an example 3 of the allocation process of the EPS bearer identifier of the present disclosure.
  • the allocation process of the EPS bearer identifier in the third example includes the following steps 61-67.
  • Step 61 The UE sends a PDU session establishment request message PDU Session Establishment Request to the AMF;
  • Step 62 After receiving the PDU Session Establishment Request sent by the UE, the AMF sends a session management request message SM Request to the SMF.
  • Step 63 After receiving the SM Request, the SMF maps the non-GBR QoS flows in the corresponding PDU session to a default bearer, and sets the EPS bearer identifier of the default bearer to the PDU session identifier; all the corresponding PDU sessions
  • the GBR QoS flows are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the EPS bearer identifier of each dedicated bearer is temporarily set to a null value, a temporary value, or a reserved value.
  • Step 64 The SMF sends an EPS Bearer Allocation Request message to the AMF, where the EPS Bearer Allocation Request carries an EPS bearer list.
  • Step 65 The AMF allocates an EPS bearer identifier to each EPS bearer according to the EPS bearer list, and sends an EPS bearer allocation response message EPS Bearer Allocation Response to the SMF, where the EPS bearer identifier is allocated in the EPS Bearer Allocation Response.
  • Step 66 The SMF completes the EPS bearer information generated by the mapping according to the allocated EPS bearer identifier, and sends a session management response message SM Response to the AMF, where the SM Response carries a PDU session establishment accept message PDU Session Establishment Accept, the PDU Session Establishment Accept
  • the mapping includes the EPS bearer information, and the QFI corresponding to the default bearer identifier and the default bearer, and the QFI corresponding to the dedicated bearer and the dedicated bearer.
  • Step 67 The AMF sends a PDU Session Establishment Accept to the UE, and notifies the UE of the completed EPS bearer information.
  • the method for allocating the EPS bearer identifier in FIG. 2 or FIG. 3 of the present disclosure by sending the first message or the second message, may request the UE or the AMF to allocate the bearer identifier to the EPS bearer generated by the mapping, thereby solving the generated mapping for the mapping.
  • the EPS bearers the problem of assigning bearer identifiers, and realizes the normal work of inter-system handover between the 5G network and the LTE network.
  • FIG. 7 is a flowchart showing a method for allocating an EPS bearer identifier of the present disclosure.
  • This embodiment of the present disclosure provides a method for allocating an EPS bearer identifier, the assignment is applied to an SMF, and includes the following steps 701 to 702, which are described in detail below.
  • Step 701 Map the session connection to the EPS bearer.
  • the session connection may be a session connection of a 5G system, that is, a 5G session connection or a Packet Data Unit (PDU) session connection.
  • the SMF may map the related session connection to the EPS bearer, that is, perform mapping of the session connection to the EPS bearer.
  • the mapping of the SMF to the PDU session connection to the EPS bearer may be specifically: mapping the non-GBR QoS flows in the PDU session to a default bearer, and the default bearer is The EPS bearer identifier is set to the PDU session identifier or temporarily set to the PDU session identifier; all GBR QoS flows in the PDU session are mapped to multiple dedicated bearers, and after the mapping completes the dedicated bearer, the associated EPS bearer identifiers of all the dedicated bearers are Set the PDU session ID to temporarily set the EPS bearer ID of all dedicated bearers to null, temporary, or reserved.
  • the EPS bearer identifier is determined to be a temporary value, and then the associated EPS bearer identifier may be re-allocated by the UE.
  • mapping rule in the present disclosure may be determined by an implementation of the SMF or an operator's policy, which is not limited by the disclosure.
  • Step 702 Send a second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the number of EPS bearers generated by the mapping.
  • the number of EPS bearers is the number of dedicated bearers.
  • the SMF may receive the request message of the EPS bearer context sent by the AMF before sending the second message to the AMF, so that the bearer identifier is uniformly allocated by the AMF for the EPS bearer generated by the mapping.
  • the AMF can allocate an EPS bearer identifier corresponding to the number of EPS bearers according to the number of EPS bearers. For example, when the number of EPS bearers is N, the AMF allocates N EPS bearer identifiers. After the assignment of the EPS bearer identifier is completed, the AMF returns the assigned EPS bearer identifier to the SMF, and the SMF fills in the assigned EPS bearer identifier to the corresponding EPS bearer, and sends the mapped EPS bearer context to the AMF.
  • the bearer identifier is allocated by the AMF for the EPS bearer generated by the mapping. Since the role of the AMF is changed to the MME in the interworking scenario of the 5G network and the LTE network, the AMF can also allocate the EPS bearer identifier.
  • the allocation process of the EPS bearer identifier in this specific example includes the following steps 81-86.
  • Step 81 After receiving the handover request sent by the RAN, the AMF sends a session management context request message SM Context Request to the SMF.
  • Step 82 After receiving the SM Context Request, the SMF maps the non-GBR QoS flows in the corresponding PDU session to a default bearer, and sets the EPS bearer identifier of the default bearer to the PDU session identifier or temporarily sets the PDU session identifier. Mapping all GBR QoS flows in the corresponding PDU session to multiple dedicated bearers, and counting the number N of dedicated bearers.
  • Step 83 The SMF sends a bearer ID request message to the AMF according to the number N of the dedicated bearers, and the Bearer ID Request includes the number N of the PDU session identifier and the dedicated bearer.
  • Step 84 The AMF determines the EPS bearer identifier, that is, determines the default bearer identifier list and the dedicated bearer identifier list, and returns the bearer ID response message Bearer ID Response to the SMF.
  • Step 85 The SMF fills in the corresponding default bearer identifier and the dedicated bearer identifier in the EPS bearer context generated by the PDU session mapping according to the received default bearer identifier list and the dedicated bearer identifier list, and returns a session management context response message to the AMF.
  • the SM Context Response carries the EPS bearer context of the mapping completion.
  • Step 86 The AMF sends a session management notification message SM Notification to the UE, and notifies the UE of all the mapped EPS bearer contexts, so that the UE knows the association between the PDU session and the EPS bearer.
  • the method for allocating the EPS bearer identifier of the embodiment of the present disclosure shown in FIG. 7 may, by sending the second message, request the AMF to uniformly allocate the bearer identifier for the EPS bearer generated by the mapping, thereby solving the problem of allocating the bearer identifier to the EPS bearer generated for the mapping.
  • the problem is to achieve normal operation of the inter-system handover between the 5G network and the LTE network.
  • FIG. 9 is a flowchart showing a method for allocating an EPS bearer identifier of the present disclosure.
  • the embodiment provides a method for allocating an EPS bearer identifier, which is applied to a Policy Control and Charging (PCC) or a Policy Control Function (PCF), and includes the following steps. From 901 to step 903, the details are as follows.
  • PCC Policy Control and Charging
  • PCF Policy Control Function
  • Step 901 Determine to map the QoS parameters of the session connection to the QoS parameters of the EPS.
  • the session connection may be a session connection of a 5G system, that is, a 5G session connection or a PDU session connection.
  • the PCC or the PCF may determine to map the QoS parameters of the session connection in the 5G system to the QoS parameters of the EPS according to the type of the SMF serving the session connection or the request of the SMF serving the session connection.
  • the SMF of the service session connection is, for example, an SMF that supports both the 5G session management function and the EPS packet data network gateway to control the PGW-C function.
  • the PCF may determine to map the QoS parameters of a certain PDU session to EPS QoS parameters according to information such as the SMF request message or the type of the SMF.
  • the specific mapping manner may be based on the operator's rules or configuration policies, and the disclosure does not limit the disclosure.
  • the mapped EPS QoS parameters may include mappings of QoS flow to EPS bearers, QoS parameters of EPS bearers, and/or information such as TFTs carried by EPS.
  • Step 902 Determine, according to the EPS QoS parameter that is mapped, the EPS bearer generated by the mapping.
  • the EPS bearer generated by the mapping may be determined according to the EPS QoS parameter.
  • Step 903 Assign an EPS bearer identifier to the EPS bearer generated by the mapping.
  • the PC bearer identifier is allocated for each EPS bearer generated by the mapping.
  • the PCF needs to determine the EPS bearer information mapped by all the current PDU sessions of the UE, so as to ensure that the allocated EPS bearer identifier is unique within the UE.
  • the allocating method further includes step 904.
  • Step 904 Send the EPS bearer information generated by the mapping to the SMF, where the EPS bearer information includes the EPS bearer identifier and the QoS parameters of the EPS bearer.
  • the SMF can know the relevant EPS bearer information in time to ensure the normal operation of the handover.
  • the SMF may further send the received EPS bearer information to the UE.
  • the method for allocating the EPS bearer identifier of the embodiment of the present disclosure shown in FIG. 9 is to determine the QoS parameter of the session connection as the QoS parameter of the EPS, and determine the EPS bearer generated by the mapping according to the EPS QoS parameter of the mapping.
  • the EPS bearer generated by the mapping allocates an EPS bearer identifier, and can implement a bearer identifier for the EPS bearer generated by the mapping.
  • the above embodiment describes the method for allocating the EPS bearer identifier of the present disclosure.
  • the following describes the allocation device of the EPS bearer logo of the present disclosure.
  • FIG. 10 is a schematic structural diagram of a distribution device of an EPS bearer identifier of the present disclosure.
  • This embodiment provides a distribution device for an EPS bearer identification, which is applied to the SMF and includes a mapping module 111 and a request module 112.
  • the mapping module 111 is configured to map the session connection to the evolved packet system EPS bearer.
  • the requesting module 112 is configured to request the terminal UE or the access bearer identifier to be allocated to the EPS bearer generated by the mobility management function body AMF for mapping.
  • the requesting module 112 includes: a first sending unit, configured to send a first message to the UE, requesting the UE to allocate a bearer identifier for the EPS bearer generated by the mapping, where the first message carries Mapping the generated EPS bearer information; and the second sending unit, configured to send the second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the EPS bearer generated by the mapping The number of information or EPS bearers.
  • the EPS bearer identifier of the dedicated bearer in the EPS bearer information is temporarily set to a null value, a temporary value, or a reserved value.
  • the EPS bearer identifier of the default bearer in the EPS bearer information is set to be a packet data unit PDU session identifier or temporarily set as a PDU session identifier.
  • the EPS bearer information carries a mapping relationship between the EPS bearer and the QoS flow of the QoS data flow, or a mapping relationship between the EPS bearer and the service flow template TFT.
  • the number of EPS bearers is the number of dedicated bearers.
  • the first message is a PDU session establishment accept message.
  • the allocating device further includes a first receiving module, where the first receiving module is configured to receive a PDU session establishment request message sent by the UE, or receive an EPS bearer context request message sent by the AMF.
  • the allocating apparatus further includes: a second receiving module, configured to receive a bearer identifier that is allocated by the UE or the AMF and that is allocated by using the EPS bearer generated by the mapping; and a first determining module, where And determining, according to the bearer identifier and the EPS bearer information generated by the mapping, the parameter information of the EPS bearer context or the related EPS bearer.
  • the allocating apparatus when the AMF allocates a bearer identifier to the EPS bearer generated by the mapping, the allocating apparatus further includes: a notification module, configured to notify the UE of the EPS bearer context or parameter information of the related EPS bearer.
  • FIG. 11 is a schematic structural diagram of a distribution device of an EPS bearer identifier of the present disclosure.
  • the embodiment further provides a distribution device for the EPS bearer identifier, the distribution device is applied to the policy control and charging system PCC or the policy control function body PCF, and includes: a second determining module 121, configured to determine a service to connect the session The quality QoS parameter is mapped to the QoS parameter of the evolved packet system EPS; the third determining module 122 is configured to determine the EPS bearer generated by the mapping according to the EPS QoS parameter of the mapping, and the allocation module 123, configured to generate the EPS for the mapping The bearer allocates an EPS bearer identifier.
  • the second determining module 121 is specifically configured to: determine, according to a type of the session management function body SMF that serves the session connection, to map the QoS parameter of the session connection to a QoS parameter of the EPS; or according to the service
  • the SMF request of the session connection determines to map the QoS parameters of the session connection to the QoS parameters of the EPS.
  • the type of the SMF is: an SMF that supports both the 5G session management function and the EPS packet data network gateway to control the PGW-C function.
  • the allocating device further includes: a sending module, configured to send the EPS bearer information generated by the mapping to the SMF, where the EPS bearer information includes the EPS bearer identifier and the QoS parameter of the EPS bearer.
  • the present disclosure also provides an SMF including a first memory, a first processor, and a computer program stored on the first memory and executable on the first processor, wherein the first processor executes
  • the computer program can implement the steps in the allocation method shown in any of the above-described Figures 2 to 8.
  • FIG. 12 is a schematic structural diagram of an SMF of the present disclosure.
  • the SMF of this embodiment specifically includes a first bus 131, a first transceiver 132, a first antenna 133, a first bus interface 134, a first processor 135, and a first memory 136.
  • the first processor 135 is configured to read the computer program in the first memory 136, and perform the following process: mapping the session connection to the EPS bearer, and requesting the UE or the AMF to allocate the bearer identifier for the EPS bearer generated by the mapping.
  • the first transceiver 132 is configured to receive and transmit data under the control of the first processor 135.
  • the first processor 135 is further configured to: send a first message to the UE, request the UE to allocate a bearer identifier for the EPS bearer generated by the mapping, where the first message carries the EPS bearer information generated by the mapping; or Sending a second message to the AMF, requesting the AMF to allocate a bearer identifier for the EPS bearer generated by the mapping, where the second message carries the EPS bearer information or the number of EPS bearers generated by the mapping.
  • the EPS bearer identifier of the dedicated bearer in the EPS bearer information is temporarily set to a null value, a temporary value, or a reserved value.
  • the EPS bearer identifier of the default bearer in the EPS bearer information is set to be a packet data unit PDU session identifier or temporarily set as a PDU session identifier.
  • the EPS bearer information carries a mapping relationship between the EPS bearer and the QoS flow of the QoS data flow, or a mapping relationship between the EPS bearer and the service flow template TFT.
  • the number of EPS bearers is the number of dedicated bearers.
  • the first message is a PDU session establishment accept message.
  • the first processor 135 is further configured to: receive a PDU session establishment request message sent by the UE; or receive an EPS bearer context request message sent by the AMF.
  • the first processor 135 is further configured to: receive a bearer identifier that is allocated by the UE or the AMF and that is allocated for the EPS bearer generated by the mapping, and determine an EPS bearer context according to the bearer identifier and the EPS bearer information generated by the mapping. Or parameter information of related EPS bearers.
  • the first processor 135 is further configured to: notify the UE of the EPS bearer context or parameter information of the related EPS bearer.
  • a first bus architecture (represented by a first bus 131), which may include any number of interconnected first buses and bridges, the first bus 131 will include the first processor 135
  • the one or more first processors and the various circuits of the first memory represented by the first memory 136 are linked together.
  • the first bus 131 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • the first bus interface 134 provides an interface between the first bus 131 and the first transceiver 132.
  • the first transceiver 132 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the first processor 135 is transmitted over the wireless medium through the first antenna 133. Further, the first antenna 133 also receives the data and transmits the data to the first processor 135.
  • the first processor 135 is responsible for managing the first bus 131 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the first memory 136 can be used to store data used by the first processor 135 when performing operations.
  • the first processor 135 may be a CPU, an ASIC, an FPGA, or a CPLD.
  • the present disclosure also provides a PCF including a second memory, a second processor, and a computer program stored on the second memory and executable on the second processor, wherein the second processor executes
  • the computer program can implement the steps in the above-described distribution method shown in FIG.
  • PCF and the PCC are consistent in the embodiment of the present disclosure.
  • the PCF is described in detail herein, and the PCC will not be described again.
  • FIG. 13 is a schematic structural diagram of a PCF of the present disclosure.
  • the PCF of this embodiment specifically includes a second bus 141, a second transceiver 142, a second antenna 143, a second bus interface 144, a second processor 145, and a second memory 146.
  • the second processor 145 is configured to read the computer program in the second memory 146, and perform the following process: determining to map the quality of service QoS parameter of the session connection to the QoS parameter of the evolved packet system EPS, and completing the EPS QoS according to the mapping.
  • the parameter determines an EPS bearer generated by the mapping, and allocates an EPS bearer identifier for the EPS bearer generated by the mapping.
  • the second transceiver 142 is configured to receive and transmit data under the control of the second processor 145.
  • the second processor 145 is further configured to: determine, according to a type of the session management function body SMF that serves the session connection, a QoS parameter that maps the session connection to an QoS parameter of the EPS; or the session according to the service.
  • the request of the connected SMF determines to map the QoS parameters of the session connection to the QoS parameters of the EPS.
  • the type of the SMF is: an SMF that supports the 5G session management function and the EPS packet data network gateway to control the PGW-C function.
  • the second processor 145 is further configured to: send the EPS bearer information generated by the mapping to the SMF, where the EPS bearer information includes the EPS bearer identifier and the QoS parameter of the EPS bearer.
  • a second bus architecture (represented by a second bus 141), the second bus 141 may include any number of interconnected second buses and bridges, and the second bus 141 will include a second processor 145.
  • the various circuits of the second memory represented by the one or more second processors and the second memory 146 are linked together.
  • the second bus 141 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art, and therefore, will not be further described herein.
  • the second bus interface 144 provides an interface between the second bus 141 and the second transceiver 142.
  • the second transceiver 142 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the second processor 145 is transmitted over the wireless medium via the second antenna 143. Further, the second antenna 143 also receives the data and transmits the data to the second processor 145.
  • the second processor 145 is responsible for managing the second bus 141 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the second memory 146 can be used to store data used by the second processor 145 when performing operations.
  • the second processor 145 can be a CPU, an ASIC, an FPGA, or a CPLD.
  • the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better.
  • Implementation Based on such understanding, the technical solution of the present disclosure, which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM).
  • the instructions include a number of instructions for causing a terminal device (which may be a cell phone, computer, server, air conditioner, or network device, etc.) to perform the methods described in various embodiments of the present disclosure.

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Abstract

本公开提供一种演进分组系统EPS承载标识的分配方法、装置、SMF及PCF。EPS承载标识的分配方法包括：将会话连接映射到EPS承载，并且请求UE或者AMF为映射生成的EPS承载分配承载标识。

Description

EPS承载标识的分配方法、装置、SMF及PCF
相关申请的交叉引用
本申请主张在2017年3月20日在中国提交的中国专利申请号No.201710166764.1的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及通信技术领域，尤其涉及一种EPS承载标识的分配方法、装置、SMF及PCF。
背景技术
为了保证第五代移动通信系统(5Generation，简称5G)的正常运行，5G网络需要支持与通用移动通信技术的长期演进(Long Term Evolution，简称LTE)网络的互操作，其中一种互操作是通过5G网络与LTE网络之间的系统间inter-RAT(无线接入技术间)切换完成的。然而，5G网络的会话通过分组数据单元(Packet Data Unit，简称PDU)会话标识PDU session ID来标识，而LTE网络中的会话通过演进分组系统(Evolved Packet System，简称EPS)承载标识EPS bearer ID来标识，因此在执行inter-RAT切换时，需要考虑相同会话在不同网络中的标识问题。
在支持5G网络和LTE网络互操作的网络架构中，LTE网络中的移动性管理功能主体(Mobility Management Entity，简称MME)和5G网络中的接入与移动性管理功能主体(Authentication Management Function，简称AMF)之间的Nx接口是可选支持的。当网络支持Nx接口时，网络可以支持5G网络和LTE网络之间的切换，此时MME和AMF之间需要传递终端UE的上下文信息，包括移动性上下文和会话连接的上下文。UE接入这种支持Nx接口的网络时，网络可能将其注册模式配置为单注册模式，即single registration mode。
当网络不支持Nx接口时，5G网络和LTE网络之间不支持切换，此时为了支持互操作，网络需要要求UE进行双注册(dual registration mode)，即同 时在LTE网络和5G网络保持注册。考虑到双注册模式下业务连续性的支持，要求网络中的控制面的会话管理功能主体(System Management Function，简称SMF)同时支持PGW-C的功能，这样通过“HO registration”，可以保证UE在LTE网络和5G网络之间移动时，其会话连接始终锚定在相同的用户面锚点上。
双注册模式下的UE又可进一步分为单广播能力和双广播能力。单广播的UE在同一时刻，只能保持一侧的会话连接，即要么在LTE网络中保持连接，要么在5G网络中保持连接，这样如果UE在LTE网络和5G网络间移动时，将不可避免的出现丢包，无法保证无缝的业务连续性。而双广播的UE可以在LTE网络和5G网络中同时保持连接，因此在网络间移动时，可以采用先接后断(make-before-break)的方式进行连接的切换，即从目标网络接收数据的同时，仍会从源网络接收数据，从而可以保证业务的连接。
其中，单注册模式下的UE从5G网络到LTE网络的切换过程主要为：
S1：AMF接收到接入网(Residential Access Network，简称RAN)的切换请求后，请求所有SMF进行PDU会话上下文的映射；SMF在将PDU会话上下文转换为EPS承载上下文之后，返回EPS承载上下文到AMF；此处将non-GBR服务质量数据流QoS flows映射到默认承载default bearer，而将GBR QoS flows映射到专用承载dedicated bearer；
S2：AMF接收到所有SMF返回的EPS承载上下文之后，结合UE的移动性上下文，生成UE上下文，并通过Nx接口传递给MME；
S3：目标侧MME将Nx接口视作S10接口，即将AMF看成MME，目标侧MME从Nx接口接收到UE上下文之后，按照相关EPS系统的S1切换流程继续后续流程；
S4：当SMF/PGW-C确定UE的会话切换到LTE网络后，可能发起dedicated bearer激活过程来为某些non-GRB QoS flows建立dedicated bearer。
相关协议描述了SMF需要进行PDU会话上下文和EPS承载上下文的映射，但是，PDU会话是由PDU session ID标识的，并且PDU session ID由UE分配，当一个PDU会话被映射成多个EmS承载时，如何分配EPS承载的承载标识的问题尚未解决。
发明内容
本公开提供一种EPS承载标识的分配方法、装置、SMF及PCF。
在第一方面，本公开提供一种EPS承载标识的分配方法，应用于会话管理功能主体SMF，包括：将会话连接映射到演进分组系统EPS承载；以及请求终端UE或者接入与移动性管理功能主体AMF为映射生成的EPS承载分配承载标识。
可选的，请求终端UE或者认证管理功能主体AMF为映射生成的EPS承载分配承载标识的步骤，包括：发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息；或者发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息或EPS承载数目。
可选的，所述EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。
可选的，所述EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
可选的，所述EPS承载信息中携带有EPS承载与服务质量数据流QoS flow的映射关系，或EPS承载与业务流模板TFT的映射关系。
可选的，所述EPS承载数目为专用承载的数目。
可选的，所述第一消息为PDU会话建立接受消息。
可选的，所述发送第二消息给所述AMF的步骤之前，所述分配方法还包括：接收所述UE发送的PDU会话建立请求消息；或者接收所述AMF发送的EPS承载上下文请求消息。
可选的，所述分配方法还包括：接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识；以及根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或者相关EPS承载的参数信息。
可选的，所述AMF为映射生成的EPS承载分配承载标识，所述分配方法还包括：通知UE所述EPS承载上下文或者相关EPS承载的参数信息。
在第二方面，本公开还提供一种EPS承载标识的分配方法，应用于策略控制与计费系统PCC或策略控制功能主体PCF，包括：确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数；根据映射完成的EPS QoS参数，确定映射生成的EPS承载；以及为所述映射生成的EPS承载分配EPS承载标识。
可选的，所述分配方法还包括：发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS承载的QoS参数。
可选的，所述确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数的步骤，包括：根据服务所述会话连接的会话管理功能主体SMF的类型，确定将所述会话连接的QoS参数映射为EPS的QoS参数；或者根据服务所述会话连接的SMF的请求，确定将所述会话连接的QoS参数映射为EPS的QoS参数。
可选的，所述SMF的类型为：同时支持5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
在第三方面，本公开还提供一种EPS承载标识的分配装置，应用于会话管理功能主体SMF，包括：映射模块，用于将会话连接映射到演进分组系统EPS承载；以及请求模块，用于请求终端UE或者接入与移动性管理功能主体AMF为映射生成的EPS承载分配承载标识。
可选的，所述请求模块包括：第一发送单元，用于发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息；以及第二发送单元，用于发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息或EPS承载数目。
可选的，所述EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。
可选的，所述EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
可选的，所述EPS承载信息中携带有EPS承载与服务质量数据流QoS flow的映射关系，或EPS承载与业务流模板TFT的映射关系。
可选的，所述EPS承载数目为专用承载的数目。
可选的，所述第一消息为PDU会话建立接受消息。
可选的，所述分配装置还包括：第一接收模块，用于接收所述UE发送的PDU会话建立请求消息；或者接收所述AMF发送的EPS承载上下文请求消息。
可选的，所述分配装置还包括：第二接收模块，用于接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识；以及第一确定模块，用于根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或相关EPS承载的参数信息。
可选的，所述AMF为映射生成的EPS承载分配承载标识，还包括：通知模块，用于通知UE所述EPS承载上下文或者相关EPS承载的参数信息。
在第四方面，本公开又提供一种EPS承载标识的分配装置，应用于策略控制与计费系统PCC或策略控制功能主体PCF，包括：第二确定模块，用于确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数；第三确定模块，用于根据映射完成的EPS QoS参数，确定映射生成的EPS承载；以及分配模块，用于为所述映射生成的EPS承载分配EPS承载标识。
可选的，所述分配装置还包括：发送模块，用于发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS承载的QoS参数。
可选的，所述第二确定模块具体用于：根据服务所述会话连接的会话管理功能主体SMF的类型，确定将所述会话连接的QoS参数映射为EPS的QoS参数；或者根据服务所述会话连接的SMF的请求，确定将所述会话连接的QoS参数映射为EPS的QoS参数。
可选的，所述SMF的类型为：同时支持5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
在第五方面，本公开又提供一种SMF，包括第一存储器、第一处理器和存储在所述第一存储器上并可在所述第一处理器上运行的计算机程序，所述第一处理器执行所述计算机程序时实现上述第一方面的应用于SMF的分配方法中的步骤。
在第六方面，本公开再提供一种PCF，包括第二存储器、第二处理器和存储在所述第二存储器上并可在所述第二处理器上运行的计算机程序，所述第二处理器执行所述计算机程序时实现上述第二方面的应用于PCF的分配方法中的步骤。
在第七方面，本公开还提供一种非易失性存储介质，包括：在所述非易失性存储介质上存储的程序和指令，其中当所述程序和指令在由处理器执行时，所述处理器实现上述第一方面的应用于SMF的分配方法中的步骤。
在第八方面，本公开还提供一种非易失性存储介质，包括：在所述非易失性存储介质上存储的程序和指令，其中当所述程序和指令在由处理器执行时，所述处理器实现上述第二方面的应用于PCF的分配方法中的步骤。
本公开的EPS承载标识的分配方法，通过将会话连接映射到EPS承载，请求UE或者AMF为映射生成的EPS承载分配承载标识，能够实现在进行会话连接到EPS承载的映射时，为映射生成的EPS承载分配承载标识，从而实现5G网络和LTE网络之间的系统间切换的正常工作。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对本公开实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示本公开的EPS承载标识的分配方法的流程图；
图2表示本公开的EPS承载标识的分配方法的流程图；
图3表示本公开的另一EPS承载标识的分配方法的流程图；
图4表示本公开的EPS承载标识的分配过程的实例一的流程图；
图5表示本公开的EPS承载标识的分配过程的实例二的流程图；
图6表示本公开的EPS承载标识的分配过程的实例三的流程图；
图7表示本公开的EPS承载标识的分配方法的流程图；
图8表示本公开的EPS承载标识的分配过程的具体实例的流程图；
图9表示本公开的EPS承载标识的分配方法的流程图；
图10表示本公开的EPS承载标识的分配装置的结构示意图；
图11表示本公开的EPS承载标识的分配装置的结构示意图；
图12表示本公开的SMF的结构示意图；以及
图13表示本公开的PCF的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
针对相关技术中尚未解决在进行会话连接到演进分组系统(Evolved Packet System，简称EPS)承载的映射时，如何为映射生成的EPS承载分配承载标识的问题，本公开的实施例提供一种EPS承载标识的分配方法、装置及会话管理功能主体(System Management Function，简称SMF)，通过在进行会话连接到EPS承载的映射时，请求用户终端(User Equipment，UE)或者移动性管理功能主体(Authentication Management Function，简称AMF)为映射生成的EPS承载分配承载标识，能够实现在进行会话连接到EPS承载的映射时，为映射生成的EPS承载分配承载标识，从而实现第五代移动通信系统(5Generation，简称5G)网络和长期演进(Long Term Evolution，简称LTE)网络之间的系统间切换的正常工作。
参见图1，图1表示本公开的EPS承载标识的分配方法的流程图。该实施例提供的EPS承载标识的分配方法应用于SMF，包括如下步骤101至步骤102，详述如下。
步骤101：将会话连接映射到EPS承载。
其中，该会话连接可为5G系统的会话连接，即5G会话连接或者PDU会话连接。SMF可在接收到AMF的会话管理请求消息后，将相关的会话连接映射到EPS承载，即进行会话连接到EPS承载的映射。
具体的，当该会话连接为PDU会话连接时，SMF进行PDU会话连接到EPS承载的映射可具体为：将PDU会话中的non-GBR QoS flows映射到一个 默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识或者临时设置为PDU会话标识；将PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将所有专用承载的关联EPS承载标识设置为PDU会话标识，将所有专用承载的EPS承载标识临时设置为空值、临时值或者保留值，而如果PDU会话标识的值不在5～15内或者因为网络配置或策略的要求，需将关联EPS承载标识设置为临时值，则后续可由UE重新分配关联EPS承载标识。
需要说明的是，本公开中的映射规则可由SMF的实现或者运营商的策略决定，本公开不对其进行限制。
步骤102：请求UE或者AMF为映射生成的EPS承载分配承载标识。
其中，SMF在请求UE或者AMF为映射生成的EPS承载分配承载标识时，可以请求该UE或者AMF为映射生成的EPS承载一一分配承载标识，也可以请求该AMF为映射生成的EPS承载统一分配承载标识，依具体情况而定。
通常，为了保证5G网络和LTE网络之间的系统间切换的正常工作，SMF要获知映射完成后的EPS承载上下文，而EPS承载上下文的最终获取要根据已分配的承载标识对映射生成的EPS承载信息进行处理，例如更新临时设置的EPS专用承载标识等。该EPS承载的上下文可具体包括每个承载的标识信息、承载的隧道端点信息以及承载的QoS参数等。
所以，该实施例中，所述分配方法还包括步骤103-104。
步骤103：接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识。
步骤104：根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或者相关EPS承载的参数信息。
进一步，当AMF为映射生成的EPS承载分配承载标识时，SMF在确定EPS承载上下文或者相关EPS承载的参数信息后，为保证UE及时获知相关EPS承载信息，还可通知UE该EPS承载上下文或者相关EPS承载的参数信息。并且，SMF还可将该EPS承载上下文发送到AMF。
而为了保证接入网侧基站节点的正常工作，SMF在接收到UE或AMF 返回的为映射生成的EPS承载分配的承载标识后，还可向接入网侧基站节点发送该为映射生成的EPS承载分配的承载标识。
本公开的该实施例的EPS承载标识的分配方法，通过将会话连接映射到EPS承载，请求UE或者AMF为映射生成的EPS承载分配承载标识，能够实现在进行会话连接到EPS承载的映射时，为映射生成的EPS承载分配承载标识，从而实现5G网络和LTE网络之间的系统间切换的正常工作。
上述的实施例说明了本公开的EPS承载标识的分配方法的基本实现过程，下面对本公开的EPS承载标识的分配方法的一些具体实现过程进行说明。
参见图2，图2表示本公开的EPS承载标识的分配方法的流程图。本公开的该实施例提供的EPS承载标识的分配方法应用于SMF，并且包括如下步骤201至步骤202，详述如下。
步骤201：将会话连接映射到EPS承载。
其中，该会话连接可为5G系统的会话连接，即5G会话连接或者PDU会话连接。SMF可在接收到AMF的会话管理请求消息后，将相关的会话连接映射到EPS承载，即进行会话连接到EPS承载的映射。
具体的，当该会话连接为PDU会话连接时，SMF进行PDU会话连接到EPS承载的映射可具体为：将PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识或者临时设置为PDU会话标识；将PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将所有专用承载的关联EPS承载标识设置为PDU会话标识，将所有专用承载的EPS承载标识临时设置为空值、临时值或者保留值，而如果PDU会话标识的值不在5～15内或者因为网络配置或策略的要求，需将关联EPS承载标识确定为临时值，则后续可由UE重新分配关联EPS承载标识。
需要说明的是，本公开的映射规则可由SMF的实现或者运营商的策略决定，本公开不对其进行限制。
步骤202：发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息。
其中，该第一消息例如为PDU会话建立接受消息。该EPS承载信息中 的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。该EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
而UE在为映射生成的EPS承载分配承载标识时，可根据服务质量数据流标识QoS flow ID(简称为QFI)或者业务流模板TFT为映射生成的EPS承载一一分配承载标识。因此，SMF发送给UE的EPS承载信息中，可携带有EPS承载与QoS flow的映射关系，或携带有EPS承载与TFT的映射关系。
参见图3，图3表示本公开的另一EPS承载标识的分配方法的流程图。本公开的该实施例提供另一种EPS承载标识的分配方法，该分配方法应用于SMF，并且包括如下步骤301至步骤302，详述如下。
步骤301：将会话连接映射到EPS承载。
其中，该会话连接可为5G系统的会话连接，即5G会话连接或者PDU会话连接。SMF可在接收到AMF的会话管理请求消息后，将相关的会话连接映射到EPS承载，即进行会话连接到EPS承载的映射。
具体的，该会话连接为PDU会话连接时，SMF进行PDU会话连接到EPS承载的映射可具体为：将PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识或者临时设置为PDU会话标识；将PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将所有专用承载的关联EPS承载标识设置为PDU会话标识，将所有专用承载的EPS承载标识临时设置为空值、临时值或者保留值，而如果PDU会话标识的值不在5～15内或者因为网络配置或策略的要求，需将关联EPS承载标识确定为临时值，则后续可由UE重新分配关联EPS承载标识。
步骤302：发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息。
其中，SMF发送第二消息给AMF之前，还可接收UE发送的PDU会话建立请求消息。该EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。该EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
而AMF在为映射生成的EPS承载分配承载标识时，可根据服务质量数据流标识QoS flow ID(简称为QFI)为映射生成的EPS承载一一分配承载标识。因此，SMF发送给UE的EPS承载信息中，可携带有EPS承载与QoS flow的映射关系。
下面，结合图4～图6对本公开的EPS承载标识的分配过程进行详细说明。
实例一
图4表示本公开的EPS承载标识的分配过程的实例一的流程图。在实例一中，对应于UE根据QFI分配EPS承载标识。参见图4所示，该实例一中的EPS承载标识的分配过程包括如下步骤41-48。
步骤41：UE发送PDU会话建立请求消息PDU Session Establishment Request到AMF。
步骤42：AMF接收到UE发送的PDU Session Establishment Request后，发送会话管理请求消息SM Request到SMF。
步骤43：SMF接收到SM Request后，将相应PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识或者临时设置为PDU会话标识；将相应PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将每个专用承载的EPS承载标识临时设置为空值、临时值或者保留值。
步骤44：SMF向AMF返回会话管理响应消息SM Response，该SM Response中携带PDU会话建立接受消息PDU Session Establishment Accept，该PDU Session Establishment Accept包括映射生成的EPS承载信息，该EPS承载信息包括默认承载标识和默认承载对应的QFI，以及专用承载和专用承载对应的QFI。
步骤45：AMF发送PDU Session Establishment Accept到UE。
步骤46：UE根据接收到的PDU Session Establishment Accept中的EPS承载信息，包括linked EPS bearer ID(关联EPS承载标识)、QFI等，如下表1所示，为每一个专用承载分配EPS承载标识。
IE Value
Linked EPS bearer ID PDU session ID
Bearer ID Null
QFI Flow 2,3
Bearer ID Null
QFI Flow 4
表1
步骤47：UE向AMF返回PDU会话建立确认消息PDU Session Establishment Complete，该PDU Session Establishment Complete中携带完善(对临时设置值进行更新)后的EPS承载信息，如下表2所示。
IE Value
Linked EPS bearer ID PDU session ID
Bearer ID 12
QFI Flow 2,3
Bearer ID 13
QFI Flow 4
表2
步骤48：AMF向SMF返回会话管理确认消息SM Complete，该SM Complete中携带PDU会话映射完成的EPS承载信息。
实例二
上述实例一对应于UE根据QFI分配EPS承载标识，但UE除可根据QFI分配EPS承载标识外，还可根据TFT分配EPS承载标识，如实例二。图5表示本公开的EPS承载标识的分配过程的实例二的流程图。参见图5所示，该实例二中的EPS承载标识的分配过程包括如下步骤51-58。
步骤51：UE发送PDU会话建立请求消息PDU Session Establishment Request到AMF。
步骤52：AMF接收到UE发送的PDU Session Establishment Request后，发送会话管理请求消息SM Request到SMF。
步骤53：SMF接收到SM Request后，将相应PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU 会话标识或者临时设置为PDU会话标识；将相应PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将每个专用承载的EPS承载标识临时设置为空值、临时值或者保留值。
步骤54：SMF向AMF返回会话管理响应消息SM Response，该SM Response中携带PDU会话建立接受消息PDU Session Establishment Accept，该PDU Session Establishment Accept包括映射生成的EPS承载信息，该EPS承载信息包括默认承载标识和默认承载对应的TFT(可选)，以及专用承载和专用承载对应的TFT。
步骤55：AMF发送PDU Session Establishment Accept到UE。
步骤56：UE根据接收到的PDU Session Establishment Accept中的EPS承载信息，包括linked EPS bearer ID(关联EPS承载标识)、TFT等，如下表3所示，为每一个专用承载分配EPS承载标识。
IE Value
PDU session ID 1
Linked EPS bearer ID PDU session ID
Bearer ID Null
TFT TFT value 1
Bearer ID Null
TFT TFT value 2
表3
步骤57：UE向AMF返回PDU会话建立确认消息PDU Session Establishment Complete，该PDU Session Establishment Complete中携带完善(对临时设置值进行更新)后的EPS承载信息，如下表4所示。
IE Value
PDU session ID 1
Linked EPS bearer ID 5
Bearer ID 12
TFT TFT value 1
Bearer ID 13
TFT TFT value 2
表4
步骤58：AMF向SMF返回会话管理确认消息SM Complete，该SM Complete中携带PDU会话映射完成的EPS承载信息。
以上实例一和实例二类似，区别仅在于，实例一中的EPS承载的相关信息包括QFI，以使UE根据QFI分配EPS承载标识，而实例二中的EPS承载的相关信息包括TFT，以使UE根据TFT分配EPS承载标识。
实例三
上述实例一和实例二中，由UE分配EPS承载标识，但除可由UE分配EPS承载标识，也可由AMF分配EPS承载标识，如实例三。由于5G网络和LTE网络的互操作场景中，AMF的角色转变为MME，因此AMF也可以进行EPS承载标识的分配。
参见图6，图6表示本公开的EPS承载标识的分配过程的实例三的流程图。该实例三中的EPS承载标识的分配过程包括如下步骤61-67。
步骤61：UE发送PDU会话建立请求消息PDU Session Establishment Request到AMF；
步骤62：AMF接收到UE发送的PDU Session Establishment Request后，发送会话管理请求消息SM Request到SMF。
步骤63：SMF接收到SM Request后，将相应PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识；将相应PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将每个专用承载的EPS承载标识临时设置为空值、临时值或者保留值。
步骤64：SMF向AMF发送EPS承载分配请求消息EPS Bearer Allocation Request，该EPS Bearer Allocation Request中携带EPS承载列表。
步骤65：AMF根据该EPS承载列表，为各个EPS承载分配EPS承载标识，并发送EPS承载分配响应消息EPS Bearer Allocation Response到SMF，该EPS Bearer Allocation Response中已分配EPS承载标识。
步骤66：SMF根据已分配EPS承载标识，完善映射生成的EPS承载信 息，并发送会话管理响应消息SM Response到AMF，该SM Response中携带PDU会话建立接受消息PDU Session Establishment Accept，该PDU Session Establishment Accept包括映射完善的EPS承载信息，该EPS承载信息包括默认承载标识和默认承载对应的QFI，以及专用承载和专用承载对应的QFI。
步骤67：AMF发送PDU Session Establishment Accept到UE，通知UE完善后的EPS承载信息。
本公开的图2或图3中的EPS承载标识的分配方法，通过发送第一消息或第二消息，可请求UE或者AMF为映射生成的EPS承载一一分配承载标识，从而解决为映射生成的EPS承载分配承载标识的问题，实现5G网络和LTE网络之间的系统间切换的正常工作。
参见图7，图7表示本公开的EPS承载标识的分配方法的流程图。本公开的该实施例提供一种EPS承载标识的分配方法，该分配应用于SMF，并且包括如下步骤701至步骤702，详述如下。
步骤701：将会话连接映射到EPS承载。
其中，该会话连接可为5G系统的会话连接，即5G会话连接或者分组数据单元(Packet Data Unit，简称PDU)会话连接。SMF可在接收到AMF的会话管理请求消息后，将相关的会话连接映射到EPS承载，即进行会话连接到EPS承载的映射。
具体的，当该会话连接为PDU会话连接时，SMF进行PDU会话连接到EPS承载的映射可具体为：将PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识或者临时设置为PDU会话标识；将PDU会话中的所有GBR QoS flows映射到多个专用承载上，并在映射完成专用承载后，将所有专用承载的关联EPS承载标识设置为PDU会话标识，将所有专用承载的EPS承载标识临时设置为空值、临时值或者保留值，而如果PDU会话标识的值不在5～15内或者因为网络配置或策略的要求，需将关联EPS承载标识确定为临时值，则后续可由UE重新分配关联EPS承载标识。
需要说明的是，本公开中的映射规则可由SMF的实现或者运营商的策略决定，本公开不对其进行限制。
步骤702：发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载数目。
其中，该EPS承载数目为专用承载的数目。而SMF在发送第二消息给AMF之前，可接收AMF发送的EPS承载上下文的请求消息，以由AMF为映射生成的EPS承载统一分配承载标识。
这样，AMF在接收到EPS承载数目后，就可根据该EPS承载数目，分配与该EPS承载数目对应的EPS承载标识。例如，该EPS承载数目为N个时，AMF会分配N个EPS承载标识。在完成EPS承载标识的分配后，AMF会向SMF返回已分配的EPS承载标识，而SMF会将已分配的EPS承载标识填写到对应的EPS承载，并将映射完成的EPS承载上下文发送给AMF。
下面，结合图8对图7所示实施例的具体实例中的EPS承载标识的分配过程进行详细说明。
图7所示的本公开的实施例的具体实例中，由AMF统一为映射生成的EPS承载分配承载标识。由于5G网络和LTE网络的互操作场景中，AMF的角色转变为MME，因此AMF也可以进行EPS承载标识的分配。
参见图8所示，该具体实例中的EPS承载标识的分配过程包括如下步骤81-86。
步骤81：AMF接收到RAN发来的切换请求后，发送会话管理上下文请求消息SM Context Request到SMF。
步骤82：SMF接收到SM Context Request后，将相应PDU会话中的non-GBR QoS flows映射到一个默认承载上，并将该默认承载的EPS承载标识设置为PDU会话标识或者临时设置为PDU会话标识；将相应PDU会话中的所有GBR QoS flows映射到多个专用承载上，统计专用承载的数目N。
步骤83：SMF根据统计出的专用承载的数目N，发送承载标识请求消息Bearer ID Request给AMF，该Bearer ID Request中包括PDU会话标识和专用承载的数目N。
步骤84：AMF确定EPS承载标识，即确定默认承载标识列表和专用承载标识列表，返回承载标识响应消息Bearer ID Response给SMF。
步骤85：SMF根据接收到的默认承载标识列表和专用承载标识列表，在 PDU会话映射生成的EPS承载上下文中分别填入对应的默认承载标识和专用承载标识，并向AMF返回会话管理上下文响应消息SM Context Response，该SM Context Response中携带映射完成的EPS承载上下文。
步骤86：AMF发送会话管理通知消息SM Notification给UE，通知UE所有映射完成的EPS承载上下文，以使UE了解PDU会话与EPS承载的关联。
图7所示的本公开的实施例的EPS承载标识的分配方法，通过发送第二消息，可请求AMF为映射生成的EPS承载统一分配承载标识，从而解决为映射生成的EPS承载分配承载标识的问题，实现5G网络和LTE网络之间的系统间切换的正常工作。
参见图9，图9表示本公开的EPS承载标识的分配方法的流程图。该实施例提供一种EPS承载标识的分配方法，该分配方法应用于策略控制与计费系统(Policy Control and Charging，简称PCC)或策略控制功能主体(Policy Control Function，简称PCF)，包括如下步骤901至步骤903，详述如下。
步骤901：确定将会话连接的QoS参数映射为EPS的QoS参数。
其中，该会话连接可为5G系统的会话连接，即5G会话连接或者PDU会话连接。在会话连接建立过程中，PCC或PCF可根据服务该会话连接的SMF的类型或者服务该会话连接的SMF的请求，确定将5G系统中会话连接的QoS参数映射为EPS的QoS参数。而服务会话连接的SMF例如为：同时支持5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
例如，PCF可根据SMF的请求消息或者SMF的类型等信息，确定将某一PDU会话的QoS参数映射为EPS QoS参数。具体映射方式可根据运营商的规则或者配置策略，本公开不对其进行限制。映射出的EPS QoS参数可包括QoS flow到EPS承载的映射关系、EPS承载的QoS参数，和/或EPS承载的TFT等信息。
步骤902：根据映射完成的EPS QoS参数，确定映射生成的EPS承载。
其中，在映射完EPS QoS参数后，就可根据该EPS QoS参数，确定出映射生成的EPS承载。
步骤903：为所述映射生成的EPS承载分配EPS承载标识。
其中，PCC或PCF在为映射生成的EPS承载分配EPS承载标识时，具体是为每一个映射生成的EPS承载分配EPS承载标识。而PCF在分配EPS承载标识之前，需确定UE当前所有PDU会话映射出的EPS承载信息，以保证所分配的EPS承载标识在UE内唯一。
本公开具体实施例中，所述分配方法还包括步骤904。
步骤904：发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS承载的QoS参数。
这样，可使SMF及时了解相关的EPS承载信息，保证切换工作的正常进行。而SMF可进一步将接收到的EPS承载信息发送给UE。
图9所示的本公开的实施例的EPS承载标识的分配方法，通过确定将会话连接的QoS参数映射为EPS的QoS参数，根据映射完成的EPS QoS参数，确定映射生成的EPS承载，为所述映射生成的EPS承载分配EPS承载标识，能够实现为映射生成的EPS承载分配承载标识。
上述实施例说明了本公开的EPS承载标识的分配方法，下面对本公开的EPS承载标识的分配装置进行说明。
参见图10，图10表示本公开的EPS承载标识的分配装置的结构示意图。该实施例提供一种EPS承载标识的分配装置，该分配装置应用于SMF，并且包括映射模块111和请求模块112。映射模块111用于将会话连接映射到演进分组系统EPS承载。请求模块112用于请求终端UE或者接入与移动性管理功能主体AMF为映射生成的EPS承载分配承载标识。
在该实施例中，所述请求模块112包括：第一发送单元，用于发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息；以及第二发送单元，用于发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息或EPS承载数目。
具体的，所述EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。
具体的，所述EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
具体的，所述EPS承载信息中携带有EPS承载与服务质量数据流QoS flow的映射关系，或EPS承载与业务流模板TFT的映射关系。
具体的，所述EPS承载数目为专用承载的数目。
具体的，所述第一消息为PDU会话建立接受消息。
在该实施例中，所述分配装置还包括第一接收模块，第一接收模块用于接收所述UE发送的PDU会话建立请求消息；或者接收所述AMF发送的EPS承载上下文请求消息。
本公开具体实施例中，所述分配装置还包括：第二接收模块，用于接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识；和第一确定模块，用于根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或相关EPS承载的参数信息。
进一步的，当所述AMF为映射生成的EPS承载分配承载标识时，所述分配装置还包括：通知模块，用于通知UE所述EPS承载上下文或者相关EPS承载的参数信息。
参见图11，图11表示本公开的EPS承载标识的分配装置的结构示意图。该实施例还提供一种EPS承载标识的分配装置，该分配装置应用于策略控制与计费系统PCC或策略控制功能主体PCF，并且包括：第二确定模块121，用于确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数；第三确定模块122，用于根据映射完成的EPS QoS参数，确定映射生成的EPS承载；以及分配模块123，用于为所述映射生成的EPS承载分配EPS承载标识。
具体的，所述第二确定模块121具体用于：根据服务所述会话连接的会话管理功能主体SMF的类型，确定将所述会话连接的QoS参数映射为EPS的QoS参数；或者根据服务所述会话连接的SMF的请求，确定将所述会话连接的QoS参数映射为EPS的QoS参数。
所述SMF的类型为：同时支持5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
进一步的，所述分配装置还包括：发送模块，用于发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS 承载的QoS参数。
图10所示的实施例的EPS承载标识的分配装置，通过将会话连接映射到EPS承载，请求UE或者AMF为映射生成的EPS承载分配承载标识，能够实现在进行会话连接到EPS承载的映射时，为映射生成的EPS承载分配承载标识的问题，从而实现5G网络和LTE网络之间的系统间切换的正常工作。
本公开还提供一种SMF，包括第一存储器、第一处理器和存储在所述第一存储器上并可在所述第一处理器上运行的计算机程序，其中，所述第一处理器执行所述计算机程序时可实现上述图2至图8任一图中所示的分配方法中的步骤。
具体的，参见图12，图12表示本公开的SMF的结构示意图。该实施例的SMF具体包括：第一总线131、第一收发机132、第一天线133、第一总线接口134、第一处理器135和第一存储器136。
其中，第一处理器135，用于读取第一存储器136中的计算机程序，执行下列过程：将会话连接映射到EPS承载，请求UE或者AMF为映射生成的EPS承载分配承载标识。第一收发机132，用于在第一处理器135的控制下接收和发送数据。
具体的，第一处理器135还用于：发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息；或者发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息或EPS承载数目。
具体的，所述EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。
具体的，所述EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
具体的，所述EPS承载信息中携带有EPS承载与服务质量数据流QoS flow的映射关系，或EPS承载与业务流模板TFT的映射关系。
具体的，所述EPS承载数目为专用承载的数目。
具体的，所述第一消息为PDU会话建立接受消息。
具体的，第一处理器135还用于：接收所述UE发送的PDU会话建立请求消息；或者接收所述AMF发送的EPS承载上下文请求消息。
具体的，第一处理器135还用于：接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识，根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或者相关EPS承载的参数信息。
具体的，所述AMF为映射生成的EPS承载分配承载标识时，第一处理器135还用于：通知UE所述EPS承载上下文或者相关EPS承载的参数信息。
在图12中，第一总线架构(用第一总线131来代表)，第一总线131可以包括任意数量的互联的第一总线和桥，第一总线131将包括由第一处理器135代表的一个或多个第一处理器和第一存储器136代表的第一存储器的各种电路链接在一起。第一总线131还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。第一总线接口134在第一总线131和第一收发机132之间提供接口。第一收发机132可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经第一处理器135处理的数据通过第一天线133在无线介质上进行传输，进一步，第一天线133还接收数据并将数据传送给第一处理器135。
第一处理器135负责管理第一总线131和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而第一存储器136可以被用于存储第一处理器135在执行操作时所使用的数据。
可选的，第一处理器135可以是CPU、ASIC、FPGA或CPLD。
本公开还提供一种PCF，包括第二存储器、第二处理器和存储在所述第二存储器上并可在所述第二处理器上运行的计算机程序，其中，所述第二处理器执行所述计算机程序时可实现上述图9所示的分配方法中的步骤。
其中，从实现功能角度来看，本公开实施例中PCF与PCC的组成部分是一致的，在此对PCF进行详细说明，而对PCC不再赘述。
具体的，参见图13，图13表示本公开的PCF的结构示意图。该实施例的PCF具体包括：第二总线141、第二收发机142、第二天线143、第二总线接口144、第二处理器145和第二存储器146。
其中，第二处理器145，用于读取第二存储器146中的计算机程序，执行下列过程：确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数，根据映射完成的EPS QoS参数，确定映射生成的EPS承载，为所述映射生成的EPS承载分配EPS承载标识。第二收发机142，用于在第二处理器145的控制下接收和发送数据。
具体的，第二处理器145还用于：根据服务所述会话连接的会话管理功能主体SMF的类型，确定将中所述会话连接的QoS参数映射为EPS的QoS参数；或者根据服务所述会话连接的SMF的请求，确定将所述会话连接的QoS参数映射为EPS的QoS参数。
具体的，所述SMF的类型为：同时支持5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
具体的，第二处理器145还用于：发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS承载的QoS参数。
在图13中，第二总线架构(用第二总线141来代表)，第二总线141可以包括任意数量的互联的第二总线和桥，第二总线141将包括由第二处理器145代表的一个或多个第二处理器和第二存储器146代表的第二存储器的各种电路链接在一起。第二总线141还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。第二总线接口144在第二总线141和第二收发机142之间提供接口。第二收发机142可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经第二处理器145处理的数据通过第二天线143在无线介质上进行传输，进一步，第二天线143还接收数据并将数据传送给第二处理器145。
第二处理器145负责管理第二总线141和通常的处理，还可以提供各种功能，包括定时，外围接口，电压调节、电源管理以及其他控制功能。而第二存储器146可以被用于存储第二处理器145在执行操作时所使用的数据。
可选的，第二处理器145可以是CPU、ASIC、FPGA或CPLD。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或 者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本公开实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本公开的技术方案本质上或者说对相关技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本公开各个实施例所述的方法。
以上所述仅是本公开的可选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本公开的保护范围。

Claims (32)

  1. 一种演进分组系统EPS承载标识的分配方法，应用于会话管理功能主体SMF并且包括：
    将会话连接映射到演进分组系统EPS承载；以及
    请求终端UE或者接入与移动性管理功能主体AMF为映射生成的EPS承载分配承载标识。
  2. 根据权利要求1所述的分配方法，其中，所述请求终端UE或者认证管理功能主体AMF为映射生成的EPS承载分配承载标识的步骤，包括：
    发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息；或者
    发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息或EPS承载数目。
  3. 根据权利要求2所述的分配方法，其中，所述EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。
  4. 根据权利要求2所述的分配方法，其中，所述EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
  5. 根据权利要求2所述的分配方法，其中，所述EPS承载信息中携带有EPS承载与服务质量数据流QoS flow的映射关系，或EPS承载与业务流模板TFT的映射关系。
  6. 根据权利要求2所述的分配方法，其中，所述EPS承载数目为专用承载的数目。
  7. 根据权利要求2所述的分配方法，其中，所述第一消息为PDU会话建立接受消息。
  8. 根据权利要求2所述的分配方法，其中，在所述发送第二消息给所述AMF的步骤之前，所述方法还包括：
    接收所述UE发送的PDU会话建立请求消息；或者
    接收所述AMF发送的EPS承载上下文请求消息。
  9. 根据权利要求1所述的分配方法，还包括：
    接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识；以及
    根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或者相关EPS承载的参数信息。
  10. 根据权利要求9所述的分配方法，其中，所述AMF为映射生成的EPS承载分配承载标识，还包括：
    通知UE所述EPS承载上下文或者相关EPS承载的参数信息。
  11. 一种演进分组系统EPS承载标识的分配方法，应用于策略控制和计费系统PCC或策略控制功能主体PCF并且包括：
    确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数；
    根据映射完成的EPS QoS参数，确定映射生成的EPS承载；以及
    为所述映射生成的EPS承载分配EPS承载标识。
  12. 根据权利要求11所述的分配方法，还包括：
    发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS承载的QoS参数。
  13. 根据权利要求11所述的分配方法，其中，所述确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数的步骤，包括：
    根据服务所述会话连接的会话管理功能主体SMF的类型，确定将所述会话连接的QoS参数映射为EPS的QoS参数；或者
    根据服务所述会话连接的SMF的请求，确定将所述会话连接的QoS参数映射为EPS的QoS参数。
  14. 根据权利要求13所述的分配方法，其中，所述SMF的类型为：
    同时支持第五代移动通信系统5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
  15. 一种演进分组系统EPS承载标识的分配装置，应用于会话管理功能主体SMF并且包括：
    映射模块，用于将会话连接映射到演进分组系统EPS承载；以及
    请求模块，用于请求终端UE或者接入与移动性管理功能主体AMF为映射生成的EPS承载分配承载标识。
  16. 根据权利要求15所述的分配装置，其中，所述请求模块包括：
    第一发送单元，用于发送第一消息给所述UE，请求所述UE为映射生成的EPS承载分配承载标识，所述第一消息中携带映射生成的EPS承载信息；以及
    第二发送单元，用于发送第二消息给所述AMF，请求所述AMF为映射生成的EPS承载分配承载标识，所述第二消息中携带映射生成的EPS承载信息或EPS承载数目。
  17. 根据权利要求16所述的分配装置，其中，所述EPS承载信息中的专用承载的EPS承载标识被临时设置为空值、临时值或者保留值。
  18. 根据权利要求16所述的分配装置，其中，所述EPS承载信息中的默认承载的EPS承载标识被设置为分组数据单元PDU会话标识或者被临时设置为PDU会话标识。
  19. 根据权利要求16所述的分配装置，其中，所述EPS承载信息中携带有EPS承载与服务质量数据流QoS flow的映射关系，或EPS承载与业务流模板TFT的映射关系。
  20. 根据权利要求16所述的分配装置，其中，所述EPS承载数目为专用承载的数目。
  21. 根据权利要求16所述的分配装置，其中，所述第一消息为PDU会话建立接受消息。
  22. 根据权利要求16所述的分配装置，还包括：
    第一接收模块，用于接收所述UE发送的PDU会话建立请求消息；或者接收所述AMF发送的EPS承载上下文请求消息。
  23. 根据权利要求15所述的分配装置，还包括：
    第二接收模块，用于接收所述UE或AMF返回的为所述映射生成的EPS承载分配的承载标识；以及
    第一确定模块，用于根据所述承载标识和映射生成的EPS承载信息，确定EPS承载上下文或相关EPS承载的参数信息。
  24. 根据权利要求23所述的分配装置，其中，所述AMF为映射生成的EPS承载分配承载标识，所述分配装置还包括：
    通知模块，用于通知UE所述EPS承载上下文或者相关EPS承载的参数信息。
  25. 一种演进分组系统EPS承载标识的分配装置，应用于策略控制与计费系统PCC或策略控制功能主体PCF并且包括：
    第二确定模块，用于确定将会话连接的服务质量QoS参数映射为演进分组系统EPS的QoS参数；
    第三确定模块，用于根据映射完成的EPS QoS参数，确定映射生成的EPS承载；以及
    分配模块，用于为所述映射生成的EPS承载分配EPS承载标识。
  26. 根据权利要求25所述的分配装置，还包括：
    发送模块，用于发送映射生成的EPS承载信息到SMF，所述EPS承载信息中包括所述EPS承载标识和所述EPS承载的QoS参数。
  27. 根据权利要求25所述的分配装置，其中，所述第二确定模块具体用于：
    根据服务所述会话连接的会话管理功能主体SMF的类型，确定将所述会话连接的QoS参数映射为EPS的QoS参数；或者
    根据服务所述会话连接的SMF的请求，确定将所述会话连接的QoS参数映射为EPS的QoS参数。
  28. 根据权利要求27所述的分配装置，其中，所述SMF的类型为：
    同时支持5G会话管理功能和EPS分组数据网网关控制PGW-C功能的SMF。
  29. 一种会话管理功能主体SMF，包括：
    第一存储器、第一处理器和存储在所述第一存储器上并可在所述第一处理器上运行的计算机程序，
    其中，所述第一处理器执行所述计算机程序时实现权利要求1至10任一项所述的分配方法中的步骤。
  30. 一种策略控制功能主体PCF，包括：
    第二存储器、第二处理器和存储在所述第二存储器上并可在所述第二处理器上运行的计算机程序，其中，所述第二处理器执行所述计算机程序时实现权利要求11至14任一项所述的分配方法中的步骤。
  31. 一种非易失性存储介质，包括：
    在所述非易失性存储介质上存储的程序和指令，其中当所述程序和指令在由处理器执行时，所述处理器实现根据权利要求1-10中任一项所述的方法。
  32. 一种非易失性存储介质，包括：
    在所述非易失性存储介质上存储的程序和指令，其中当所述程序和指令在由处理器执行时，所述处理器实现根据权利要求11-14中任一项所述的方法。
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