WO2022042295A1 - 一种承载处理方法及装置 - Google Patents

一种承载处理方法及装置 Download PDF

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Publication number
WO2022042295A1
WO2022042295A1 PCT/CN2021/111824 CN2021111824W WO2022042295A1 WO 2022042295 A1 WO2022042295 A1 WO 2022042295A1 CN 2021111824 W CN2021111824 W CN 2021111824W WO 2022042295 A1 WO2022042295 A1 WO 2022042295A1
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Prior art keywords
bearer
terminal device
network element
network
pdu session
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PCT/CN2021/111824
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English (en)
French (fr)
Inventor
李洪
舒林
孙兵
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华为技术有限公司
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Publication of WO2022042295A1 publication Critical patent/WO2022042295A1/zh

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    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • 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
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the embodiments of the present application relate to the field of communication technologies, and in particular, to a bearer processing method and apparatus.
  • the session management is related to the evolved packet system (EPS) bearer
  • the session management is related to the protocol data unit (protocol data unit). unit, PDU) session.
  • EPS evolved packet system
  • PDU protocol data unit
  • the network will not only allocate the EPS bearer parameters of the 4G network to the terminal device, but also allocate the EPS bearer parameters associated with it.
  • the network not only allocates the PDU session parameters of the 5G network to the terminal device, but also allocates the EPS bearer parameters of the associated 4G network.
  • Embodiments of the present application provide a bearer processing method and device, which are used to solve the problem that the EPS bearer established by a terminal device in the prior art after the ability to access a 5G network is disabled, and after the terminal device enables the ability to access a 5G network, different systems Moving to the 5G network, because there is no associated PDU session parameter, the PDU session associated with the EPS bearer cannot be mapped, resulting in the release of the EPS bearer, causing service interruption and affecting user experience.
  • the present application provides a bearer processing method.
  • the method includes: after a terminal device enables the ability to access a 5G network, sending a first message to a mobility management network element, where the first message includes a 4G network EPS bearer associated PDU session identification information, wherein the EPS bearer is established by the terminal device after the ability to access the 5G network is disabled; the terminal device receives the second message from the mobility management network element, so The second message includes PDU session parameters allocated for the EPS bearer.
  • the PDU session parameter is allocated by the mobility management network element for the EPS bearer according to the PDU session identification information.
  • the terminal device can initiate a bearer modification process to the mobility management network element after enabling the ability to access the 5G network, and the described
  • the PDU session identification information associated with the EPS bearer is sent to the mobility management network element, so that the mobility management network element allocates PDU session parameters for the EPS, so that after the terminal equipment moves to the 5G network from different systems, it can use the PDU session parameters.
  • the EPS bearer is seamlessly converted (or mapped) to the PDU session of the 5G network, so as to avoid service interruption of the terminal equipment and help improve user experience.
  • the method before the sending the first message to the mobility management network element, the method further includes: receiving, by the terminal device, a third message from the mobility management network element, where the third message includes the network Indication information capable of processing the PDU session identification information.
  • the terminal device before initiating the bearer modification process, the terminal device needs to determine that the network can process the PDU session identification information, and supports the terminal device to initiate the bearer modification process, which is beneficial to avoid unnecessary signaling overhead.
  • the network can process the indication information of the PDU session identification information, and after the terminal device sends a PDN connection request to the mobility management network element, the activation bearer (such as an EPS bearer) context request message sent by the mobility management network element to the terminal device can be included in the context request message.
  • the activation bearer such as an EPS bearer
  • Carrying is beneficial to saving signaling overhead, and enables the terminal device to know in time whether the network can process the PDU session identification information.
  • the first message is a bearer resource modification request message.
  • the second message is a bearer context modification request message or a bearer context activation request message.
  • the present application provides a bearer processing method.
  • the method includes: a mobility management network element receives a first message from a terminal device, where the first message includes PDU session identification information associated with an EPS bearer in a 4G network, wherein the The EPS bearer is established after the terminal device's ability to access the 5G network is disabled; the mobility management network element sends a bearer resource command message to the gateway network element, and the bearer resource command message includes the PDU session identification information ; the mobility management network element receives an update bearer request message from the gateway network element, and the update bearer request message includes the PDU session parameters allocated for the EPS bearer; the mobility management network element sends the terminal device A second message, the second message including the PDU session parameters.
  • the PDU session parameter is allocated by the gateway network element for the EPS bearer according to the PDU session identification information.
  • the terminal device can initiate a bearer modification process to the mobility management network element after enabling the ability to access the 5G network, and the described
  • the PDU session identification information associated with the EPS bearer is sent to the mobility management network element, so that the mobility management network element can process the PDU session identification information of the terminal device, obtain the PDU session parameters allocated for the EPS from the gateway network element, and send it to the terminal.
  • the method further includes: the mobility management network element sending a third message to the terminal device, where the third message includes indication information that the network can process the PDU session identification information.
  • the third message is an activate bearer context request message.
  • the network can process the indication information of the PDU session identification information, and after the terminal device sends a PDN connection request to the mobility management network element, the activation bearer (such as an EPS bearer) context request message sent by the mobility management network element to the terminal device can be included in the context request message.
  • the activation bearer such as an EPS bearer
  • Carrying is beneficial to saving signaling overhead, and enables the terminal device to know in time whether the network can process the PDU session identification information.
  • the first message is a bearer resource modification request message.
  • the second message is a bearer context modification request message or a bearer context activation request message.
  • the PDU session parameters include at least one of the following: slice information, QoS flow description, QoS rules, and session maximum bit rate aggregation.
  • the terminal device it is beneficial for the terminal device to know the parameter information of the establishment of the PDU session, and to ensure the seamless switching of the PDU session from the EPS bearer of the 4G network to the 5G network after the terminal device from different systems to the 5G network.
  • the present application provides a bearer processing method.
  • the method includes: after a terminal device enables the ability to access a 5G network, deactivating a 4G network EPS bearer, where the EPS bearer is the terminal device in the It is established after the ability to access the 5G network is disabled; the terminal device sends a packet data network PDN connection request message to the mobility management network element, and the PDN connection request message includes the PDU session identification information associated with the EPS bearer; the The terminal device receives an activate bearer context request message from the mobility management network element, where the activate bearer context request message includes PDU session parameters allocated for the EPS bearer.
  • the PDU session parameter is allocated for the EPS bearer by the mobility management network element according to the PDU session identification information.
  • the terminal device can deactivate the EPS bearer and report to the mobility management
  • the network element sends a PDN connection request message including the PDU session identification information associated with the EPS bearer, so that the mobility management network element re-establishes an EPS bearer for the terminal device, and allocates PDU session parameters for the EPS bearer, so that the terminal device can move from one system to another
  • the EPS bearer can be seamlessly converted (or mapped) to the PDU session of the 5G network, so as to avoid service interruption of the terminal equipment and improve user experience.
  • deactivating the 4G network EPS bearer includes: the terminal device receiving a deactivation bearer context request message from the mobility management network element; The terminal device deactivates the EPS bearer according to the deactivation bearer context request message.
  • the deactivation bearer context request message includes indication information for instructing the terminal device to reactivate the bearer; the terminal device sends the PDN connection request message to the mobility management network element, including: the terminal device according to the The indication information sends a PDN connection request message to the mobility management network element.
  • deactivating the 4G network EPS bearer includes: the terminal device sends a PDN connection separation request message to the mobility management network element; the The terminal device receives the deactivation bearer context request message from the mobility management network element; the terminal device deactivates the EPS bearer according to the deactivation bearer context request message.
  • the terminal device can actively initiate the deactivation of the 4G network EPS bearer. For example, when there is no data transmission, the terminal device can actively initiate the deactivation of the 4G network EPS bearer, which can effectively avoid interference to the existing services of the terminal device, and can also effectively protect the EPS bearer.
  • the acquisition of PDU session parameters associated with the bearer avoids the service interruption caused by the movement of different systems to the 5G network.
  • the PDU session parameters include at least one of the following: slice information, QoS flow description, QoS rules, and session maximum bit rate aggregation.
  • the terminal device it is beneficial for the terminal device to know the parameter information of the establishment of the PDU session, and to ensure the seamless switching of the PDU session from the EPS bearer of the 4G network to the 5G network after the terminal device from different systems to the 5G network.
  • the present application provides a bearer processing method, the method comprising: a mobility management network element determining that a terminal device having established a 4G network EPS bearer enables access to a 5G network, wherein the EPS bearer is the terminal device Established after the ability to access the 5G network is disabled; the mobility management network element sends a deactivation bearer context request message to the terminal device, where the deactivation bearer context request message includes instructions for indicating the terminal device Indication to reactivate the bearer.
  • the mobility management network element can instruct the terminal equipment to reactivate the bearer after learning that the terminal equipment with the 4G network EPS bearer has established the ability to access the 5G network after the ability to access the 5G network is disabled.
  • the associated PDU session parameters are allocated to the EPS bearer of the terminal device, which is beneficial to ensure that the EPS bearer can be seamlessly converted (or mapped) according to the PDU session parameters after the terminal device moves to the 5G network from different systems.
  • the PDU session to the 5G network avoids the interruption of terminal equipment services and improves the user experience.
  • the method before the mobility management network element sends the deactivation bearer context request message to the terminal device, the method further includes: the mobility management network element sends a fourth message to the gateway network element, the The fourth message includes information about the capability of the terminal device to support access to the 5G network; the mobility management network element receives a bearer deletion request message from the gateway network element, where the bearer deletion request message includes instructions for indicating the terminal Indication for the device to reactivate the bearer.
  • an embodiment of the present application provides a bearer processing device, which has the function of implementing the first aspect or any possible method in the design of the first aspect, or implementing the third aspect or the third aspect.
  • the function of any possible design method can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units (modules) corresponding to the above functions, such as a transceiver unit and a processing unit.
  • the device may be a chip or an integrated circuit.
  • the apparatus includes a processor and a transceiver, the processor is coupled to the transceiver for implementing the method described in the first aspect or any possible design of the first aspect function, or realize the function of the third aspect or any possible design method of the third aspect.
  • the apparatus may further comprise a memory storing functions executable by the processor for implementing the method described in the above first aspect or any possible design of the first aspect, or implementing the above third aspect or any of the possible designs of the third aspect of the functionality of the method in the program.
  • the apparatus may be a terminal device.
  • an embodiment of the present application provides a bearer processing device, the device having the function of implementing the second aspect or any possible method in the design of the second aspect, or implementing the fourth aspect or the fourth aspect.
  • the function of any possible design method, the function can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more units (modules) corresponding to the above functions, such as a transceiver unit and a processing unit.
  • the device may be a chip or an integrated circuit.
  • the apparatus includes a processor and a transceiver, the processor being coupled to the transceiver for implementing the method described in the second aspect or any possible design of the second aspect function, or realize the function of the fourth aspect or any possible design method of the fourth aspect.
  • the apparatus may further comprise a memory storing functions executable by the processor for implementing the method described in the above second aspect or any possible design of the second aspect, or implementing the above fourth aspect Or a program of the functionality of the method in any possible design of the fourth aspect.
  • the apparatus may be a mobility management network element.
  • an embodiment of the present application provides a bearer processing system, where the bearer processing system may include a terminal device and a mobility management network element, where the terminal device may execute the first aspect or any possible design of the first aspect.
  • the mobility management network element may perform the method described in the second aspect or any possible design of the second aspect; or, the terminal device may perform any one of the third aspect or the third aspect.
  • the mobility management network element may execute the method described in the fourth aspect or any of the possible designs of the fourth aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium has a method for executing the first aspect or any possible design of the first aspect, or Perform the method described in the second aspect or any possible design of the second aspect above, or perform the method described in the third aspect or any possible design of the third aspect above, or perform the fourth aspect above.
  • an embodiment of the present application further provides a computer program product, including a computer program or an instruction, when the computer program or instruction is executed, the above-mentioned first aspect or any possible design of the first aspect can be implemented
  • a computer program product including a computer program or an instruction, when the computer program or instruction is executed, the above-mentioned first aspect or any possible design of the first aspect can be implemented
  • the present application further provides a chip for implementing the method described in the first aspect or any possible design of the first aspect, or implementing the second aspect or the second aspect.
  • FIG. 1 is a schematic diagram of a 4G network architecture provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a process in which a terminal device resides on an LTE network according to an embodiment of the present application
  • FIG. 4 is one of schematic diagrams of a bearer processing process provided by an embodiment of the present application.
  • FIG. 5 is a second schematic diagram of a bearer processing process provided by an embodiment of the present application.
  • FIG. 6 is one of schematic diagrams of an EPS bearer deactivation process provided by an embodiment of the present application.
  • FIG. 7 is the second schematic diagram of the EPS bearer deactivation process provided by the embodiment of the present application.
  • FIG. 8 is a third schematic diagram of an EPS bearer deactivation process provided by an embodiment of the present application.
  • FIG. 9 is one of schematic diagrams of a bearer processing apparatus provided by an embodiment of the present application.
  • FIG. 10 is the second schematic diagram of the bearer processing apparatus provided by the embodiment of the present application.
  • FIG. 11 is the third schematic diagram of the bearer processing apparatus provided by the embodiment of the application.
  • FIG. 12 is a fourth schematic diagram of a bearer processing apparatus provided by an embodiment of the present application.
  • the technical solutions provided in this application can be applied to 4G network architecture, 4G-5G interoperable network architecture, and future communication network architecture. Part of the network architecture to which this application is applicable is introduced below.
  • the terminal device is taken as an example of a user equipment (user equipment, UE).
  • FIG. 1 it is a schematic diagram of a possible 4G network architecture applicable to this application, and the network elements in the 4G network architecture include UE, mobility management entity (mobility management entity, MME), serving GPRS support node (serving GPRS support node, SGSN), home subscriber server (HSS), serving gateway (serving gateway, SGW), packet data network gateway (packet data network gateway, PDN gateway, PGW), policy and charging rule functions (policy and charging rules function, PCRF) entity, evolved universal terrestrial radio access network (evolved universal terrestrial radio access network, E-TURAN), etc.
  • mobility management entity mobility management entity
  • MME serving GPRS support node
  • HSS home subscriber server
  • SGW serving gateway
  • Packet data network gateway packet data network gateway
  • PDN gateway Packet data network gateway
  • PGW policy and charging rule functions
  • PCRF policy and charging rules function
  • E-TURAN evolved universal terrestrial radio access network
  • the network architecture also includes 2G/3G access networks, namely GSM/EDGE radio access network (GERAN)/UMTS terrestrial radio access network (UTRAN), GERAN/UTRAN And SGSN participated in the inter-system movement of the terminal equipment between 4G and 2G/3G, including the movement of the idle state and the handover of the connected state.
  • 2G/3G access networks namely GSM/EDGE radio access network (GERAN)/UMTS terrestrial radio access network (UTRAN), GERAN/UTRAN
  • GERAN/UTRAN UMTS terrestrial radio access network
  • SGSN participated in the inter-system movement of the terminal equipment between 4G and 2G/3G, including the movement of the idle state and the handover of the connected state.
  • the network architecture 4G-5G interoperability network architecture also includes: Unified Data Management (UDM), Fifth Generation Radio Access Network (NG-RAN), Access and Mobility Management Function (AMF), User Plane Functions in 5G Network Architecture Entity (user plane function, UPF), session management function entity (session management function, SMF) and other network elements.
  • UDM Unified Data Management
  • NG-RAN Fifth Generation Radio Access Network
  • AMF Access and Mobility Management Function
  • UPF User Plane Functions in 5G Network Architecture Entity
  • UPF User Plane Functions in 5G Network Architecture Entity
  • SMF session management function entity
  • a 4G-5G converged gateway will be selected, that is, the 4G PGW-C (the control plane of the PGW gateway) and the 5G SMF are converged (SMF +PGW-C), 4G PGW-U (the user plane of the PGW gateway) and 5G UPF are integrated (UPF+PGW-U), so that when the terminal device accesses 4G and establishes the EPS bearer, if the terminal device has To enable the ability to access 5G networks, the converged gateway can not only assign the EPS bearer parameters of the 4G network, but also the PDU session parameters of the associated 5G network; when the terminal device is connected to 5G and establishes a PDU session, the converged gateway can not only Allocate the PDU session parameters of the 5G network, and can also allocate the EPS bearer parameters of the associated 4G network. In this way, during the 4G-5G interoperability, the 4G PGW-C (the control plane of the PGW gateway) and the 5G SMF are
  • the network architectures shown in FIG. 1 and FIG. 2 above can all be used as network architectures applicable to this application.
  • the above network architectures are just examples, and the present application is not limited to be applicable to the above network architectures.
  • Terminal equipment including equipment that provides voice and/or data connectivity to a user, for example, may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal equipment may communicate with the core network via a radio access network (RAN), and exchange voice and/or data with the RAN.
  • RAN radio access network
  • the terminal equipment may include UE, wireless terminal equipment, mobile terminal equipment, device-to-device (D2D) terminal equipment, V2X terminal equipment, machine-to-machine/machine-type communication (machine-to-machine/machine) -type communications, M2M/MTC) terminal equipment, Internet of things (IoT) terminal equipment, subscriber unit (subscriber unit), subscriber station (subscriber station), mobile station (mobile station), remote station (remote station) , access point (access point, AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), or user equipment (user device), etc.
  • IoT Internet of things
  • these may include mobile telephones (or "cellular" telephones), computers with mobile terminal equipment, portable, pocket-sized, hand-held, computer-embedded mobile devices, and the like.
  • mobile telephones or "cellular" telephones
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • constrained devices such as devices with lower power consumption, or devices with limited storage capacity, or devices with limited computing power, etc.
  • it includes information sensing devices such as barcodes, radio frequency identification (RFID), sensors, global positioning system (GPS), and laser scanners.
  • RFID radio frequency identification
  • GPS global positioning system
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices or smart wearable devices, etc. It is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes. Wait.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • Use such as all kinds of smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.
  • the various terminal devices described above if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be considered as on-board terminal equipment.
  • the on-board terminal equipment is also called on-board unit (OBU). ).
  • the terminal device may further include a relay (relay).
  • a relay relay
  • any device capable of data communication with the base station can be regarded as a terminal device.
  • N1 capability refers to the ability of terminal equipment to support access to 5G network through 5G non-access stratum (NAS) protocol, also known as the ability to access 5G network, also known as N1 mode capability (N1 mode capability). capability).
  • NAS non-access stratum
  • S1 capability refers to the ability of terminal equipment to support access to 4G network through 4G NAS protocol, also known as the ability to access 4G network, also known as S1 mode capability (S1mode capability), or evolved general land-based wireless Access capability (E-UTRA capability).
  • S1mode capability S1 mode capability
  • E-UTRA capability evolved general land-based wireless Access capability
  • 3GPP TS 24.501 protocol stipulates that some scenarios (such as IMS registration failure, etc.) occur in the terminal device under 5G, and the terminal device needs to disable the N1 capability, that is, the terminal device does not support the N1 capability .
  • Section 4.9.2 of the 3GPP TS 24.501 protocol after the terminal device is Disable N1, it will try to search the network to the 4G long term evolution (LTE) network. If the search is successful, it will stay on the LTE network and initiate an attach ) request or a tracking area update (TAU) request to inform the network to turn off the N1 capability.
  • LTE long term evolution
  • TAU tracking area update
  • the EPS bearer established under LTE will not carry the protocol data unit in the packet data network (PDN) connection request (PDN connectivity request) message after the terminal device disables the N1 capability.
  • PDU packet data network
  • PDU session identification information (different PDU sessions under 5G are uniquely identified by the PDU session identification), because the protocol stipulates that only the N1 capability is supported, the terminal device needs to carry the PDU session identification, which makes the network deliver the default to the terminal device.
  • the bearer activation request will only carry the EPS bearer parameters of the 4G network, and will not carry the PDU session parameters of the associated 5G network.
  • the 3GPP TS 24.501 protocol stipulates that when the voice center is changed to a data center, and the N1 mode re-enable timer expires, the terminal device re-enables the N1 capability.
  • the terminal device corresponds to these
  • the PDU session associated with the EPS bearer cannot be mapped, resulting in the release of the EPS bearer, resulting in service interruption and poor user experience.
  • SA 5G independent networking
  • FIG. 3 a schematic diagram of the process of camping on the LTE network after disabling the ability to access the 5G network for the terminal device.
  • the terminal device After the terminal device successfully camps on the LTE network, the terminal device initiates an attach or TAU process, for example, the terminal device sends an attach request (request) or a TAU request message to the network.
  • the network capability information element of the terminal device in the attach request (request) or TAU request message is set to N1 mode not supported, indicating that the terminal device does not support the N1 capability, that is, does not support access to 5G network capabilities.
  • S304 The terminal device initiates a PDN connection establishment request message to the network. Since the terminal device does not support the N1 capability, the terminal device will not generate PDU session identification information (such as PDU session ID), and will not carry the PDU session identification in the PDN connection request message. information.
  • PDU session identification information such as PDU session ID
  • a network may refer to one or more network elements on the network side, for example, a network may refer to a mobility management network element (such as an MME), a gateway network element (such as an MME) located on the network side SGW and/or PGW) etc.
  • a mobility management network element such as an MME
  • a gateway network element such as an MME located on the network side SGW and/or PGW
  • the PDN connection establishment request (PDN connectivity request) message (S304a in the figure) sent by the terminal device to the mobility management network element (such as MME) on the network side does not carry the PDU session identification information, and the mobility management network element sends the gateway to the gateway.
  • the create session request (create session request) message (S304b in the figure) sent by the network element (such as the SGW and/or the PGW) also does not carry the PDU session identification information.
  • S305 The network delivers a default bearer establishment request message to the terminal device, and the default bearer establishment request message does not carry PDU session parameters.
  • the gateway network element sends a create session response (create session response) message to the mobility management network element (S305a in the figure).
  • the mobility management network element After receiving the create session response message sent by the gateway network element, the mobility management network element sends a message to the terminal.
  • the device sends an activate default EPS bearer context request (activate default EPS bearer context request) message that does not carry the PDU session parameters (S305b in the figure).
  • the gateway network element in the network is a gateway (SGW and/or PGW) of a 4G network architecture
  • the gateway network element will not generate PDU session parameters.
  • the gateway network element in the network is a 4G-5G converged gateway (SGW and/or PGW) or PGW)
  • the 4G-5G fusion gateway does not receive the PDU session identification information of the terminal device, it is considered that the newly created PDN connection does not support interoperability with 5G, that is, the newly created PDN connection will not be mapped to 5G. PDU session, so in this step, the 4G-5G converged gateway will not generate PDU session parameters.
  • S306 The terminal device replies to the network that the default bearer is activated successfully, and establishes an EPS bearer.
  • the terminal device replies an activate default EPS bearer context accept (activate default EPS bearer context accept) message to the mobility management network element (S306a in the figure), and the mobility management network element accepts the activation default EPS bearer context after receiving the reply from the terminal device.
  • the gateway network element sends a modify bearer request (modify bearer request) message to the gateway network element (S306b in the figure), and the gateway network element sends a modify bearer response (modify bearer response) message to the mobility management network element according to the modified bearer request message (S306c in the figure)
  • the establishment of the EPS bearer by the terminal device is completed.
  • the terminal device re-enables the N1 capability (that is, enables the capability to access the 5G network).
  • the terminal device re-enables the N1 capability (that is, enables the ability to access the 5G network).
  • the terminal device initiates a TAU process and successfully executes it because the wireless capability changes, and sends a TAU request message.
  • the terminal equipment network capability information element in the TAU request message is set to N1 as the supported mode (N1mode supported), indicating that the network terminal equipment supports the N1 capability.
  • N1mode supported the supported mode
  • the wireless capability of the terminal device includes enabling the N1 capability (that is, enabling the ability to access the 5G network)
  • the terminal device moves from the 4G network to the 5G network
  • the solution according to the prior art will not be able to map the EPS bearer associated with it. PDU session, resulting in the release of the EPS bearer, causing service interruption and affecting user experience.
  • the purpose of this application is to solve the EPS bearer established by the terminal equipment in the prior art after the ability to access the 5G network is disabled. After the terminal equipment starts the ability to access the 5G network, the different system moves to the 5G network. Since there is no associated PDU session parameter, the PDU session associated with the EPS bearer cannot be mapped, resulting in the release of the EPS bearer, causing service interruption and affecting user experience.
  • the solution of the present application is not limited to handover scenarios between 4G and 5G networks.
  • the present application is also applicable to the following scenarios: when the terminal device disables the ability to access the first network and establishes a data channel of the second network, after the terminal device enables the ability to access the first network, the different system moves to the first network .
  • At least one may also be described as one or more, and the plurality may be two, three, four or more, which is not limited in this application.
  • "/" may indicate that the related objects are an "or" relationship, for example, A/B may indicate A or B; “and/or” may be used to describe that there are three types of associated objects A relationship, for example, A and/or B, can mean that A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • words such as “first” and “second” may be used to distinguish technical features with the same or similar functions.
  • the words “first”, “second” and the like do not limit the quantity and execution order, and the words “first”, “second” and the like do not limit certain differences.
  • words such as “exemplary” or “for example” are used to represent examples, illustrations or illustrations, and any embodiment or design solution described as “exemplary” or “for example” should not be construed are preferred or advantageous over other embodiments or designs.
  • the use of words such as “exemplary” or “such as” is intended to present the related concepts in a specific manner to facilitate understanding.
  • FIG. 4 is a schematic diagram of a bearer processing process provided by an embodiment of the present application, and the process includes:
  • the terminal device After enabling the ability to access the 5G network, the terminal device sends a first message to a mobility management network element, and the mobility management network element receives the first message, where the first message includes a PDU associated with an EPS bearer of a 4G network Session identification information.
  • the EPS bearer is established by the terminal device after the ability to access the 5G network is disabled (disabled).
  • the terminal device is first disabled from the ability to access the 5G network, and then establishes the EPS bearer of the 4G network.
  • the network EPS bears the associated PDU session parameters, so that after the terminal equipment moves from different systems to the 5G network, the 4G network EPS bearer can be seamlessly transferred (transfer) or mapped (map) to the 5G network PDU according to the PDU session parameters. session.
  • the embodiments of the present application may be applicable to a 4G-5G converged network architecture, and the involved mobility management network elements may be MME, etc.; the involved gateway network elements may be converged gateways, such as SMF+PGW-C, etc.
  • the terminal device can actively access the 5G network after enabling the ability to access the 5G network.
  • a bearer modification process is initiated, and a first message is sent to the mobility management network element, where the first message includes PDU session identification information associated with the EPS bearer of the 4G network.
  • the first message may be a bearer resource modification request (bearer resource modification request) message, and the message carries PDU session identification information associated with the 4G network EPS bearer, such as a PDU session (session) identification. (identity, ID).
  • the terminal device when the terminal device initiates a PDN connection to establish the EPS bearer of the 4G network after disabling the ability to access the 5G network, it may choose the 4G gateway shown in Figure 1, or the 4G-connection shown in Figure 2.
  • 5G converged gateways, but 4G gateways cannot allocate corresponding PDU session parameters for the 4G network EPS bearer established by the terminal device according to the PDU session identification information.
  • the terminal equipment can establish the EPS bearer of the 4G network, or After the terminal device establishes the 4G network EPS bearer, the mobility management network element on the network side sends a third message including indication information to the terminal device, where the indication information is used to indicate that the network can process the PDU session identification information.
  • the third message may be an activate bearer context request message.
  • the mobility management network element carries the above indication information in the request message for activating the default EPS bearer context sent to the terminal device.
  • the mobility management network element sends a bearer resource command message to a gateway network element, and the gateway network element receives the bearer resource command message, where the bearer resource command message includes the PDU session identification information.
  • the gateway network element sends an update bearer request message to the mobility management network element, and the mobility management network element receives the update bearer request message, where the update bearer request message includes a PDU session allocated for the EPS bearer parameter.
  • the mobility management network element After receiving the first message including the PDU session identification information sent by the terminal device, the mobility management network element sends a bearer resource command (bearer resource command) message including the PDU session identification information to the gateway network element, thereby instructing the gateway network element
  • a bearer resource command (bearer resource command) message including the PDU session identification information to the gateway network element, thereby instructing the gateway network element
  • the PDU session identification information is processed, and PDU session parameters are allocated to the 4G network EPS bearer corresponding to the terminal device.
  • the gateway network element After receiving the bearer resource command including the PDU session identification information, the gateway network element allocates the PDU session parameters for the 4G network EPS bearer corresponding to the terminal device according to the PDU session identification information, and passes the update bearer request (update bearer request) message. Sent to the mobility management network element.
  • the PDU session parameters include single network slice selection assistance information (S-NSSAI), quality of service (QoS) flow descriptions (QoS flow descriptions), QoS rules (QoS rules), One or more of the session aggregate maximum bit rate (session-aggregate maximum bit rate, session-AMBR), etc.
  • the mobility management network element sends a second message to the terminal device, and the terminal device receives the second message, where the second message includes the PDU session parameter.
  • the mobility management network element after receiving the update bearer request message sent by the gateway network element, the mobility management network element sends the PDU session parameters including the PDU session parameters allocated for the 4G network EPS bearer corresponding to the terminal device to the terminal device through the second message.
  • the second message may be a modify bearer context request message (modify bearer context request) or a bearer context activation request message or the like.
  • the terminal device may also send a modify bearer context accept (modify bearer context accept) message to the mobile management network element to inform the mobile management network element that the 4G network EPS bearer context is successfully modified.
  • the mobility management network element may also send an update bearer response (update bearer response) message to the gateway network element to inform the gateway network element that the terminal device has successfully modified the 4G network EPS bearer context.
  • the terminal device saves the PDU session parameters associated with the 4G network EPS bearer included in the second message.
  • the terminal device moves to the 5G network from a different system, it can seamlessly convert (or map) the 4G network EPS bearer according to the PDU session parameters.
  • QoS flow QoS flow
  • a 4G network EPS bearer terminal device is established, and after enabling the ability to access the 5G network, the terminal equipment actively initiates a bearer resource modification request to obtain PDU session parameters.
  • the terminal device when initiating a PDN connection to build a 4G network EPS bearer, it may choose a 4G gateway as shown in Figure 1, or a 4G-5G as shown in Figure 2.
  • Converged gateway the embodiment of the present application also provides a bearer processing solution to cope with scenarios such as terminal equipment selecting a 4G gateway as shown in FIG. 1 or a 4G-5G converged gateway as shown in FIG. 2 .
  • FIG. 5 is a schematic diagram of a bearer processing process provided by an embodiment of the present application, and the process includes:
  • the terminal device After enabling the ability to access the 5G network, the terminal device deactivates the EPS bearer of the 4G network.
  • the EPS bearer is established by the terminal device after the ability to access the 5G network is disabled.
  • the terminal device after disabling the ability to access the 5G network, the terminal device that has established the EPS bearer of the 4G network, after enabling the ability to access the 5G network, deactivates the EPS bearer of the 4G network, and re-sends to the mobility management network element the information including:
  • the PDU session identification information associated with the 4G network EPS bearer is used to obtain the PDU session parameters associated with the 4G network EPS bearer, so that after the terminal equipment moves to the 5G network from different systems, the 4G network EPS bearer can be transferred according to the PDU session parameters.
  • the QoS flow that is converted (or mapped) to the 5G network PDU session can be applied to the 4G network EPS bearer established after the terminal device disables the ability to access the 5G network.
  • the mobility management network element selects the 4G network as shown in Figure 1. Gateways or scenarios such as 4G-5G converged gateways as shown in Figure 2.
  • the terminal device will correspond to the 4G network EPS bearer when deactivating the 4G network EPS bearer.
  • the gateway network element is a 4G gateway. If the terminal device establishes the 4G network EPS bearer after disabling the ability to access the 5G network, and the mobile management network element is connected to the 4G-5G converged gateway, when the terminal device deactivates the 4G network EPS bearer The corresponding gateway network element is a 4G-5G converged gateway.
  • the gateway network elements connected to the mobility management network element are all 4G-5G converged gateways.
  • the gateway network element corresponding to the EPS bearer of the 4G network established after the terminal device disables the ability to access the 5G network may be referred to as the first gateway network element; After the capability of the network, the gateway network element corresponding to the re-establishment of the PDN connection process is called the second gateway network element.
  • the first gateway network element may be a 4G gateway (such as PGW, etc.), or a 4G-5G fusion gateway (such as SMF+PGW-C, etc.); the second gateway network element is a 4G-5G fusion gateway (such as SMF+ PGW-C, etc.).
  • the deactivation of the 4G network EPS bearer may be initiated by the terminal device after enabling the ability to access the 5G network.
  • the terminal device after the terminal device enables the ability to access the 5G network, it can send a PDN disconnect request message to the mobility management network element, and the mobility management network element receives the PDN connection sent by the terminal device. After separating the request message, send a delete session request message to the first gateway network element, requesting the gateway network element to delete the EPS bearer.
  • the mobile management network element After receiving the delete session response (delete session response) message replied by the first gateway network element, the mobile management network element sends a deactivate EPS bearer context request (deactivate EPS bearer context request) message to the terminal device, instructing the terminal device to deactivate the The EPS bearer is received, and the deactivation EPS bearer context accept (deactivate EPS bearer context accept) message replied by the terminal device is received to complete the deactivation of the EPS bearer.
  • EPS bearer context request deactivate EPS bearer context request
  • the terminal device may have no uplink and downlink signaling and data packet transmission for a period of time, and the network device actively releases the link to let the terminal device enter the idle state (IDLE). After that, deactivate the 4G network EPS bearer.
  • the deactivation of the 4G network EPS bearer by the terminal device may be initiated by a network instruction.
  • Manner 1 The mobility management network element sends a bearer context deactivation request and generates bearer reactivation indication information.
  • the mobility management network element learns in the TAU process of S308 shown in Figure 3 that the terminal equipment supports access.
  • the capability of the 5G network that is, after supporting the N1 capability, send a delete bearer command message to the first gateway network element, instructing the first gateway network element to delete the EPS bearer; after receiving a reply from the first gateway network element After the delete bearer request (delete bearer request) message, send the deactivation bearer context request (deactivate bearer context request) message to the terminal device including the indication information for instructing the terminal device to reactivate the bearer (reactivation requested), the terminal device After receiving the deactivation bearer context request message, the EPS bearer is deactivated, and a deactivate EPS bearer context accept (deactivate EPS bearer context accept) message is returned to the mobility management network element, and the mobility management network element sends a message to the first gateway network element. A delete bearer response message is sent to complete the deletion of the EPS bearer.
  • the above-mentioned deletion of the EPS bearer may also be referred to as deactivating the EPS bearer; similarly, the above-mentioned deactivation of the EPS bearer may also be referred to as the deletion of the EPS bearer.
  • the above-mentioned deactivation of the EPS bearer and deletion of the EPS bearer have the same meaning as the activation state of terminating the EPS bearer, and deactivation and deletion are only different descriptions used in different messages and/or different network elements.
  • Manner 2 The first gateway network element sends a bearer deletion request and generates bearer reactivation indication information.
  • the mobility management network element learns in the TAU process of S308 shown in Figure 3 that the terminal device supports access.
  • the capability of the 5G network that is, after supporting the N1 capability, a fourth message is sent to the first gateway network element, where the fourth message includes information about the capability of the terminal device to support access to the 5G network; the first gateway network element receives the After the fourth message, it is learned that the terminal device supports the ability to access the 5G network.
  • the first gateway network element sends a delete bearer request message including the indication information of the reactivation requested (reactivation requested) to the mobility management network element, requesting the mobility management network element Delete the EPS bearer without the associated PDU session parameters, and then the mobility management network element sends a deactivation bearer context request (deactivate bearer context request) to the terminal device including the indication information for instructing the terminal device to reactivate the bearer (reactivation requested).
  • the terminal device deactivates the EPS bearer, and returns a deactivate bearer context accept (deactivate bearer context accept) message to the mobility management network element, and the mobility management network element sends the first
  • the gateway network element sends a delete bearer response message to complete the deletion of the EPS bearer.
  • the fourth message may be a modify bearer request (modify bearer request) message.
  • the cause value "39" triggers the terminal device (such as UE) to release the EPS bearer locally, and initiates a PDN connection establishment request again.
  • the processing of the cause value 39 is described in the 3GPP TS 24.301 protocol as " If the DEACTIVATE EPS BEARER CONTEXT REQUEST includes ESM cause #39"reactivation requested"and the EPS bearer context is a default EPS bearer context,and the UE provided an APN for the establishment of the PDN connection,the UE shall is stop timer T3396if it running for the APN provided by the UE.
  • the UE should then re-initiate the UE requested PDN connectivity procedure for the same APN as the deactivated default EPS bearer context to reactivate the EPS bearer context". Therefore, in this application, the indication information of the bearer reactivation carried in the deactivation bearer context request message in FIG. 7 or FIG. 8 may be indicated by
  • S502 the terminal device sends a PDN connection request message to the mobility management network element, where the PDN connection request message includes PDU session identification information associated with the EPS bearer.
  • the terminal device After the terminal device deactivates the EPS bearer of the 4G network, it sends a PDN connection request (PDN connectivity request) message to the mobility management network element. Since the terminal device already supports the ability to access the 5G network (ie, the N1 capability), it will generate and connect to the PDN.
  • the request message carries the PDU session identification information associated with the EPS bearer.
  • the mobility management network element After receiving the PDN connection request (PDN connectivity request) message including the PDU session identification information sent by the terminal device, the mobility management network element sends a create session request (create session) including the PDU session identification information to the second gateway network element request) message.
  • the second gateway network element After receiving the create session request message including the PDU session identification information, the second gateway network element allocates PDU session parameters to the 4G network EPS bearer corresponding to the terminal device according to the PDU session identification information, and responds by creating a session (create session response) message is sent to the mobility management network element.
  • the PDU session parameters include one or more of S-NSSAI, QoS flow description, QoS rules, session-AMBR and the like.
  • the terminal device receives an activate bearer context request message from the mobility management network element, where the activate bearer context request message includes a PDU session parameter allocated for the EPS bearer.
  • the mobility management network element after receiving the session creation response message sent by the second gateway network element, the mobility management network element sends the PDU session parameters including the PDU session parameters allocated for the 4G network EPS bearer of the terminal device to the terminal device by activating the bearer context request message.
  • the activate bearer context request message may be an activate default bearer context request (activate default bearer context request) message.
  • the terminal device may also inform the network that the 4G network EPS bearer is successfully activated. Specifically, the terminal device can send an activate default bearer context accept (activate default bearer context accept) message to the mobile management network element to inform the mobile management network element that the 4G network EPS bearer has been activated, and the mobile management network element can also modify the bearer request (modify the bearer context).
  • bearer request informs the second gateway network element terminal device that the 4G network EPS bearer is activated successfully, and receives a modify bearer response (modify bearer response) message replied by the second gateway network element.
  • the terminal device After the terminal device obtains the PDU session parameters associated with the 4G network EPS bearer, when the terminal device moves to the 5G network from different systems, it can seamlessly convert (or map) the 4G network EPS bearer to the 5G network PDU session parameters according to the PDU session parameters. QoS flow to avoid interruption of terminal equipment services.
  • each network element includes a corresponding hardware structure and/or software module (or unit) for performing each function.
  • each network element includes a corresponding hardware structure and/or software module (or unit) for performing each function.
  • the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.
  • FIG. 9 shows a possible exemplary block diagram of a bearer processing apparatus involved in the embodiment of the present application, and the bearer processing apparatus 900 may exist in the form of software.
  • the apparatus 900 may include: a processing unit 902 and a transceiving unit 903 .
  • the processing unit 902 is used to implement corresponding processing functions.
  • the transceiver unit 903 is used to support the communication between the apparatus 900 and other network entities.
  • the transceiving unit 903 may include a receiving unit and/or a sending unit, respectively configured to perform receiving and sending operations.
  • the apparatus 900 may further include a storage unit 901 for storing program codes and/or data of the apparatus 900 .
  • the apparatus 900 may be the terminal device in any of the foregoing embodiments, or may also be a chip or other components provided in the terminal device.
  • the processing unit 902 can support the apparatus 900 to perform the actions of the terminal device in the above method examples.
  • the processing unit 902 mainly executes the internal actions of the terminal device in the method example, and the transceiver unit 903 may support the communication between the apparatus 900 and the mobility management network element and the like.
  • the processing unit 902 is configured to send a first message to the mobility management network element through the transceiver unit 903 after the ability to access the 5G network is enabled, where the first message includes 4G PDU session identification information associated with a network EPS bearer, where the EPS bearer is established by the terminal device after the ability to access the 5G network is disabled;
  • the processing unit 902 is further configured to receive, through the transceiver unit 903, a second message from the mobility management network element, where the second message includes a PDU session parameter allocated for the EPS bearer.
  • the PDU session parameter is allocated to the EPS bearer by the mobility management network element according to the PDU session identification information.
  • the processing unit 902 is further configured to, through the transceiver unit 903, receive a third message from the mobility management network element before sending the first message to the mobility management network element, the The third message includes indication information that the network can process the PDU session identification information.
  • the third message is an activate bearer context request message.
  • the first message is a bearer resource modification request message.
  • the second message is a bearer context modification request message or a bearer context activation request message.
  • the PDU session parameters include at least one of the following:
  • the processing unit 902 is configured to deactivate the 4G network EPS bearer through the transceiver unit 903 after enabling the ability to access the 5G network, where the EPS bearer is the terminal device in the connection established after the ability to access the 5G network was disabled;
  • the processing unit 902 is further configured to send a PDN connection request message to the mobility management network element through the transceiver unit 903, where the PDN connection request message includes the PDU session identification information associated with the EPS bearer;
  • the processing unit 902 is further configured to receive, through the transceiver unit 903, an activate bearer context request message from the mobility management network element, where the activate bearer context request message includes a PDU session parameter allocated for the EPS bearer.
  • the processing unit 902 when the processing unit 902 deactivates the EPS bearer of the 4G network through the transceiver unit 903 , the processing unit 902 is specifically configured to receive, through the transceiver unit 903 Deactivation bearer context request message of the mobility management network element; deactivating the EPS bearer according to the deactivation bearer context request message.
  • the deactivation bearer context request message includes indication information for instructing the terminal device to reactivate the bearer
  • processing unit 902 sends the PDN connection request message to the mobility management network element through the transceiver unit 903, it is specifically configured to send the PDN connection request message to the mobility management network element through the transceiver unit 903 according to the indication information.
  • the processing unit 902 when the processing unit 902 deactivates the EPS bearer of the 4G network through the transceiver unit 903 after enabling the ability to access the 5G network, the processing unit 902 is specifically configured to send a message to the mobility management network through the transceiver unit 903
  • the element sends a PDN connection separation request message; receives a deactivation bearer context request message from the mobility management network element; and deactivates the EPS bearer according to the deactivation bearer context request message.
  • the PDU session parameter is allocated to the EPS bearer by the mobility management network element according to the PDU session identification information.
  • the PDU session parameters include at least one of the following:
  • an embodiment of the present application further provides a bearer processing apparatus 1000 .
  • the bearer processing apparatus 1000 includes a processor 1010 and a transceiver 1030 , and may further include a memory 1020 .
  • the memory 1020 stores instructions, programs, or data, and the memory 1020 may be used to implement the function of the storage unit 901 in the foregoing embodiment.
  • the processor 1010 is used to read instructions or programs or data stored in the memory 1020 .
  • the processor 1010 is configured to perform the operations performed by the processing unit 902 in the foregoing embodiments
  • the transceiver 1030 is configured to perform the operations performed by the transceiving unit 903 in the foregoing embodiments.
  • Fig. 11 shows a possible exemplary block diagram of another bearer processing apparatus involved in the embodiments of the present application, and the bearer processing apparatus 1100 may exist in the form of software.
  • the apparatus 1100 may include: a processing unit 1102 and a transceiver unit 1103 .
  • the processing unit 1102 is used to implement corresponding processing functions.
  • the transceiver unit 1103 is used to support the communication between the apparatus 1100 and other network entities.
  • the transceiving unit 1103 may include a receiving unit and/or a sending unit, which are respectively configured to perform receiving and sending operations.
  • the apparatus 1100 may further include a storage unit 1101 for storing program codes and/or data of the apparatus 1100 .
  • the apparatus 1100 may be a mobility management network element in any of the foregoing embodiments, or may also be a chip or other components provided in the mobility management network element.
  • the processing unit 1102 may support the apparatus 1100 to perform the actions of the mobility management network element in each method example above. Alternatively, the processing unit 1102 mainly executes the internal actions of the mobility management network element in the method example, and the transceiver unit 1103 may support the communication between the apparatus 1100 and the terminal device or the like.
  • the processing unit 1102 is configured to receive a first message from a terminal device through the transceiver unit 1103, where the first message includes PDU session identification information associated with an EPS bearer of a 4G network, wherein The EPS bearer is established after the terminal device's ability to access the 5G network is disabled;
  • the processing unit 1102 is further configured to send a bearer resource command message to the gateway network element through the transceiver unit 1103, where the bearer resource command message includes the PDU session identification information; and receive an updated bearer from the gateway network element a request message, where the update bearer request message includes a PDU session parameter allocated for the EPS bearer;
  • the processing unit 1102 is further configured to send a second message to the terminal device through the transceiver unit 1103, where the second message includes the PDU session parameter.
  • the PDU session parameter is allocated for the EPS bearer by the gateway network element according to the PDU session identification information.
  • the processing unit 1102 is further configured to send a third message to the terminal device through the transceiver unit 1103, where the third message includes an indication that the network can process the PDU session identification information information.
  • the third message is an activate bearer context request message.
  • the first message is a bearer resource modification request message.
  • the second message is a bearer context modification request message or a bearer context activation request message.
  • the PDU session parameters include at least one of the following:
  • the processing unit 1102 is configured to determine that a terminal device that has established a 4G network EPS bearer enables the ability to access a 5G network, wherein the EPS bearer is the terminal device accessing the 5G network in the was established after the ability was disabled;
  • the processing unit 1102 is further configured to send a bearer context deactivation request message to the terminal device through the transceiver unit 1103, where the deactivation bearer context request message includes indication information for instructing the terminal device to reactivate the bearer .
  • the processing unit 1102 before the processing unit 1102 sends the deactivation bearer context request message to the terminal device through the transceiver unit 1103, the processing unit 1102 is further configured to send a fourth message to the gateway network element through the transceiver unit 1103 , the fourth message includes information about the capability of the terminal device to support access to the 5G network; receive a bearer deletion request message from the gateway network element, where the bearer deletion request message includes instructions for reactivating the terminal device Bearer indication information.
  • an embodiment of the present application further provides a bearer processing apparatus 1200 .
  • the bearer processing apparatus 1200 includes a processor 1210 and a transceiver 1230 , and may further include a memory 1220 .
  • the memory 1220 stores instructions, programs, or data, and the memory 1220 may be used to implement the functions of the storage unit 1101 in the foregoing embodiment.
  • the processor 1210 is used to read instructions or programs or data stored in the memory 1220 .
  • the processor 1210 is configured to perform the operations performed by the processing unit 1102 in the foregoing embodiments
  • the transceiver 1230 is configured to perform the operations performed by the transceiving unit 1103 in the foregoing embodiments.
  • the above-mentioned processor may be a central processing unit (CPU), a network processor (NP), or a combination of CPU and NP.
  • the processor may further include hardware chips or other general purpose processors.
  • the above-mentioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general-purpose array logic (generic array logic, GAL) and other programmable logic devices. , discrete gate or transistor logic devices, discrete hardware components, etc., or any combination thereof.
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the embodiments of the present application may be provided as a method, a system, or a computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions
  • the apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

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Abstract

本申请涉及通信技术领域，公开了一种承载处理方法及装置，用以解决现有技术中终端设备在禁用接入5G网络的能力后建立的EPS承载，在终端设备启动接入5G网络的能力后，异系统移动到5G网络，由于没有关联的PDU会话参数，无法映射出EPS承载所关联的PDU会话，EPS承载会被释放，造成业务中断的问题。该方法包括：终端设备在启用接入5G网络的能力后，向移动管理网元发送第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息，其中EPS承载为所述终端设备在接入5G网络的能力被禁用后建立的；所述终端设备接收来自所述移动管理网元的第二消息，所述第二消息包括为所述EPS承载分配的PDU会话参数。

Description

一种承载处理方法及装置
相关申请的交叉引用
本申请要求在2020年08月26日提交中国国家知识产权局、申请号为202010873946.4、申请名称为“一种承载处理方法及装置”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
本申请实施例涉及通信技术领域，尤其涉及一种承载处理方法及装置。
背景技术
在第四代移动通信技术(the 4 th generation，4G)中会话管理与演进的分组系统(evolved packet system，EPS)承载相关，而在5G中与会话管理相关的则是协议数据单元(protocol data unit，PDU)会话。为了保证终端设备在4G网络和5G网络之间移动时业务的连续性，当终端设备在4G网络建立EPS承载时，网络不仅会为终端设备分配4G网络的EPS承载参数，还会分配与之关联的5G网络的PDU会话参数；当终端设备处于5G网络建立PDU会话时，网络不仅会为终端设备分配5G网络的PDU会话参数，还会分配与之关联的4G网络的EPS承载参数。因此，终端设备在4G网络与5G网络之间移动时，4G网络的EPS承载和5G网络的PDU会话就可以无缝转换，最大限度的保证业务的连续性。而4G网络能够这样做的一个前提就是终端设备支持接入5G网络的能力。
然而，3GPP TS 24.501协议规定了终端设备在5G网络下发生某些场景时，如IP多媒体子系统(IP multimedia subsystem，IMS)注册失败等时，终端设备需要禁用接入5G网络的能力，而禁用接入5G网络的能力的终端设备在4G网络下建立EPS承载时，网络不会为终端设备分配与之关联的PDU会话参数，这就导致终端设备在启用接入5G网络的能力后，没有关联PDU会话参数的EPS承载，在终端设备从4G网络异系统移动到5G网络后，无法映射出EPS承载所关联的PDU会话，导致EPS承载被释放，造成业务中断，影响用户体验。
发明内容
本申请实施例提供一种承载处理方法及装置，用于解决现有技术中终端设备在禁用接入5G网络的能力后建立的EPS承载，在终端设备启动接入5G网络的能力后，异系统移动到5G网络，由于没有关联的PDU会话参数，无法映射出EPS承载所关联的PDU会话，导致EPS承载被释放，造成业务中断，影响用户体验的问题。
第一方面，本申请提供了一种承载处理方法，该方法包括：终端设备在启用接入5G网络的能力后，向移动管理网元发送第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；所述终端设备接收来自所述移动管理网元的第二消息，所述第二消息包括为所述EPS承载分配的PDU会话参数。其中，所述PDU会话参数是所述移动管理网元根据 所述PDU会话标识信息为所述EPS承载分配的。
采用上述方法，如果终端设备在禁用接入5G网络的能力后建立有4G网络EPS承载，则终端设备在启用接入5G网络的能力后，可以向移动管理网元发起承载修改流程，将所述EPS承载关联的PDU会话标识信息发送给移动管理网元，使得移动管理网元为所述EPS分配PDU会话参数，从而使得终端设备异系统移动到5G网络后，可以根据所述PDU会话参数将所述EPS承载无缝转换(或映射)到5G网络的PDU会话，避免终端设备业务的中断，有利于提高用户体验。
在一个可能的设计中，所述向移动管理网元发送第一消息前，所述方法还包括：所述终端设备接收来自所述移动管理网元的第三消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
上述设计中，终端设备在发起承载修改流程前，需要确定网络能够处理所述PDU会话标识信息，支持终端设备发起承载修改流程，有利于避免不必要的信令开销。
在一个可能的设计中，所述第三消息为激活承载上下文请求消息。
上述设计中，网络能够处理PDU会话标识信息的指示信息，可以在终端设备向移动管理网元发送PDN连接请求后，移动管理网元向终端设备发送的激活承载(如EPS承载)上下文请求消息中携带，有利于节约信令开销，并使得终端设备及时获知网络是否能够处理PDU会话标识信息。
在一个可能的设计中，所述第一消息为承载资源修改请求消息。
在一个可能的设计中，所述第二消息为修改承载上下文请求消息或激活承载上下文请求消息。
在一个可能的设计中，所述PDU会话参数包括以下中的至少一项：切片信息、QoS流描述、QoS规则、会话最大比特率汇聚。
上述设计中，有利于终端设备获知建立PDU会话的参数信息，保障终端设备异系统移动到5G网络后，4G网络的EPS承载到5G网络的PDU会话的无缝切换。
第二方面，本申请提供了一种承载处理方法，该方法包括：移动管理网元接收来自终端设备的第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息，其中所述EPS承载为所述终端设备在接入5G网络的能力被禁用后建立的；所述移动管理网元向网关网元发送承载资源命令消息，所述承载资源命令消息包括所述PDU会话标识信息；所述移动管理网元接收来自所述网关网元的更新承载请求消息，所述更新承载请求消息包括为所述EPS承载分配的PDU会话参数；所述移动管理网元向所述终端设备发送第二消息，所述第二消息包括所述PDU会话参数。其中，所述PDU会话参数是所述网关网元根据所述PDU会话标识信息为所述EPS承载分配的。
采用上述方法，如果终端设备在禁用接入5G网络的能力后建立有4G网络EPS承载，则终端设备在启用接入5G网络的能力后，可以向移动管理网元发起承载修改流程，将所述EPS承载关联的PDU会话标识信息发送给移动管理网元，使得移动管理网元可以对终端设备的PDU会话标识信息进行处理，从网关网元获取为所述EPS分配PDU会话参数，并发送给终端设备，从而使得终端设备异系统移动到5G网络后，可以根据所述PDU会话参数将所述EPS承载无缝转换(或映射)到5G网络的PDU会话，避免终端设备业务的中断，有利于提高用户体验。
在一个可能的设计中，所述方法还包括：所述移动管理网元向所述终端设备发送第三 消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
上述设计中，有利于终端设备在发起承载修改流程前，确定网络能够处理所述PDU会话标识信息，支持终端设备发起承载修改流程，避免不必要的信令开销。
在一个可能的设计中，所述第三消息为激活承载上下文请求消息。
上述设计中，网络能够处理PDU会话标识信息的指示信息，可以在终端设备向移动管理网元发送PDN连接请求后，移动管理网元向终端设备发送的激活承载(如EPS承载)上下文请求消息中携带，有利于节约信令开销，并使得终端设备及时获知网络是否能够处理PDU会话标识信息。
在一个可能的设计中，所述第一消息为承载资源修改请求消息。
在一个可能的设计中，所述第二消息为修改承载上下文请求消息或激活承载上下文请求消息。
在一个可能的设计中，所述PDU会话参数包括以下中的至少一项：切片信息、QoS流描述、QoS规则、会话最大比特率汇聚。
上述设计中，有利于终端设备获知建立PDU会话的参数信息，保障终端设备异系统到5G网络后，4G网络的EPS承载到5G网络的PDU会话的无缝切换。
第三方面，本申请提供了一种承载处理方法，该方法包括：终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；所述终端设备向移动管理网元发送分组数据网PDN连接请求消息，所述PDN连接请求消息包括所述EPS承载关联的PDU会话标识信息；所述终端设备接收来自所述移动管理网元的激活承载上下文请求消息，所述激活承载上下文请求消息包括为所述EPS承载分配的PDU会话参数。可选的，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
采用上述方法，如果终端设备在禁用接入5G网络的能力后建立有4G网络EPS承载，则终端设备在启用接入5G网络的能力后，终端设备可以去激活所述EPS承载，并向移动管理网元发送包括所述EPS承载关联的PDU会话标识信息PDN连接请求消息，使得移动管理网元重新为终端设备建立EPS承载，并为所述EPS承载分配PDU会话参数，从而使得终端设备异系统移动到5G网络后，所述EPS承载可以无缝转换(或映射)到5G网络的PDU会话，避免终端设备业务的中断，有利于提高用户体验。
在一个可能的设计中，所述终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载，包括：所述终端设备接收来自所述移动管理网元的去激活承载上下文请求消息；所述终端设备根据所述去激活承载上下文请求消息去激活所述EPS承载。可选的，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息；所述终端设备向移动管理网元发送PDN连接请求消息，包括：所述终端设备根据所述指示信息向所述移动管理网元发送PDN连接请求消息。
上述设计中，终端设备可以根据移动管理网元的指示，去激活4G网络EPS承载，以及发送PDN连接请求消息，有利于避免对终端设备现有业务造成干扰。
在一个可能的设计中，所述终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载，包括：所述终端设备向所述移动管理网元发送PDN连接分离请求消息；所述终端设备接收来自所述移动管理网元的去激活承载上下文请求消息；所述终端设备根据所述去激活承载上下文请求消息去激活所述EPS承载。
上述设计中，终端设备可以主动发起去激活4G网络EPS承载，如在没有数据传输时主动发起去激活4G网络EPS承载，可以有效避免对终端设备现有业务造成干扰，同时也能有效保障对EPS承载关联的PDU会话参数的获取，避免异系统移动到5G网络造成的业务中断。
在一个可能的设计中，所述PDU会话参数包括以下中的至少一项：切片信息、QoS流描述、QoS规则、会话最大比特率汇聚。
上述设计中，有利于终端设备获知建立PDU会话的参数信息，保障终端设备异系统到5G网络后，4G网络的EPS承载到5G网络的PDU会话的无缝切换。
第四方面，本申请提供了一种承载处理方法，该方法包括：移动管理网元确定建立有4G网络EPS承载的终端设备启用接入5G网络的能力，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；所述移动管理网元向所述终端设备发送去激活承载上下文请求消息，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息。
上述设计中，移动管理网元在获知在禁用接入5G网络的能力后建立有4G网络EPS承载的终端设备启动接入5G网络的能力后，可以指示终端设备重新激活承载，从而在终端设备重新发起PDN连接时，为终端设备的EPS承载分配关联的PDU会话参数，有利于保障终端设备异系统移动到5G网络后，可以根据所述PDU会话参数将所述EPS承载无缝转换(或映射)到5G网络的PDU会话，避免终端设备业务的中断，提高用户体验。
在一个可能的设计中，所述移动管理网元向所述终端设备发送去激活承载上下文请求消息前，所述方法还包括：所述移动管理网元向网关网元发送第四消息，所述第四消息包括所述终端设备支持接入5G网络的能力的信息；所述移动管理网元接收来自所述网关网元的删除承载请求消息，所述删除承载请求消息包括用于指示所述终端设备重新激活承载的指示信息。
上述设计中，也可以由网关网元在获知在禁用接入5G网络的能力后建立有4G网络EPS承载的终端设备支持接入5G网络的能力后，下发指示终端设备重新激活承载的指示信息，指示终端设备重新激活承载，从而为终端设备的EPS承载分配关联的PDU会话参数，有利于保障终端设备异系统移动到5G网络后，可以根据所述PDU会话参数将所述EPS承载无缝转换(或映射)到5G网络的PDU会话，避免终端设备业务的中断，提高用户体验。
第五方面，本申请实施例提供一种承载处理装置，该装置具有实现上述第一方面或者第一方面的任一种可能的设计中方法的功能，或者实现上述第三方面或者第三方面的任一项可能的设计中方法的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元(模块)，比如包括收发单元和处理单元。
在一个可能的设计中，该装置可以是芯片或者集成电路。
在一个可能的设计中，该装置包括处理器和收发器，所述处理器与所述收发器耦合，用于实现上述第一方面或者第一方面的任一种可能的设计中所述的方法的功能，或者实现上述第三方面或者第三方面的任一项可能的设计中方法的功能。该装置还可以包括存储器，所述存储器存储有可被处理器执行的用于实现上述第一方面或者第一方面的任一种可能的设计中所述的方法的功能，或者实现上述第三方面或者第三方面的任一项可能的设计中 方法的功能的程序。
在一个可能的设计中，该装置可以为终端设备。
第六方面，本申请实施例提供一种承载处理装置，该装置具有实现上述第二方面或者第二方面的任一种可能的设计中方法的功能，或者实现上述第四方面或者第四方面的任一项可能的设计中方法的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元(模块)，比如包括收发单元和处理单元。
在一个可能的设计中，该装置可以是芯片或者集成电路。
在一个可能的设计中，该装置包括处理器和收发器，所述处理器与所述收发器耦合，用于实现上述第二方面或者第二方面的任一种可能的设计中所述的方法的功能，或者实现上述第四方面或者第四方面的任一项可能的设计中方法的功能。该装置还可以包括存储器，所述存储器存储有可被处理器执行的用于实现上述第二方面或者第二方面的任一种可能的设计中所述的方法的功能，或者实现上述第四方面或者第四方面的任一项可能的设计中方法的功能的程序。
在一个可能的设计中，该装置可以为移动管理网元。
第七方面，本申请实施例提供一种承载处理系统，该承载处理系统可以包括终端设备和移动管理网元，其中终端设备可以执行上述第一方面或者第一方面的任一种可能的设计中所述的方法，移动管理网元可以执行上述第二方面或者第二方面的任一种可能的设计中所述的方法；或者，终端设备可以执行上述第三方面或者第三方面的任一种可能的设计中所述的方法，移动管理网元可以执行上述第四方面或者第四方面的任一种可能的设计中所述的方法。
第八方面，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质具有用于执行上述第一方面或者第一方面的任一种可能的设计中所述的方法，或执行上述第二方面或者第二方面的任一种可能的设计中所述的方法，或执行上述第三方面或者第三方面的任一种可能的设计中所述的方法，或执行上述第四方面或者第四方面的任一种可能的设计中所述的方法的计算机程序或指令。
第九方面，本申请实施例还提供一种计算机程序产品，包括计算机程序或指令，当所述计算机程序或指令被执行时，可以实现上述第一方面或者第一方面的任一种可能的设计中所述的方法，或实现上述第二方面或者第二方面的任一种可能的设计中所述的方法，或实现上述第三方面或者第三方面的任一种可能的设计中所述的方法，或实现上述第四方面或者第四方面的任一种可能的设计中所述的方法。
第十方面，本申请还提供一种芯片，所述芯片用于实现上述第一方面或者第一方面的任一种可能的设计中所述的方法，或实现上述第二方面或者第二方面的任一种可能的设计中所述的方法，或实现上述第三方面或者第三方面的任一种可能的设计中所述的方法，或实现上述第四方面或者第四方面的任一种可能的设计中所述的方法。
上述第五方面至第十方面所能达到的技术效果请参照上述第一方面至第四方面所能达到的技术效果，这里不再重复赘述。
附图说明
图1为本申请实施例提供的4G网络架构示意图；
图2为本申请实施例提供的4G-5G互操作网络架构示意图；
图3为本申请实施例提供的终端设备驻留在LTE网络的过程示意图；
图4为本申请实施例提供的承载处理过程示意图之一；
图5为本申请实施例提供的承载处理过程示意图之二；
图6为本申请实施例提供的EPS承载去激活过程示意图之一；
图7为本申请实施例提供的EPS承载去激活过程示意图之二；
图8为本申请实施例提供的EPS承载去激活过程示意图之三；
图9为本申请实施例提供的承载处理装置示意图之一；
图10为本申请实施例提供的承载处理装置示意图之二；
图11为本申请实施例提供的承载处理装置示意图之三；
图12为本申请实施例提供的承载处理装置示意图之四。
具体实施方式
本申请提供的技术方案可以适用于4G网络架构，也可以适用于4G-5G互操作网络架构，以及未来的通信网络架构等。下面介绍本申请适用的部分网络架构，在下面的介绍中，以终端设备为用户设备(user equipment，UE)为例。
如图1所示，为本申请适用的一种可能的4G网络架构示意图，该4G网络架构中的网元包括UE、移动管理实体(mobility management entity，MME)、服务GPRS支持节点(serving GPRS support node，SGSN)、归属签约服务器(home subscriber server，HSS)、服务网关(serving gateway，SGW)、分组数据网网关(packet data network gateway，PDN gateway，PGW)、策略与计费规则功能(policy and charging rules function，PCRF)实体、演进的通用陆基无线接入网(evolved universal terrestrial radio access network，E-TURAN)等。另外，网络架构中还包括2G/3G接入网络，即GSM/EDGE无线通讯网络(GSM EDGE radio access network，GERAN)/UMTS陆地无线接入网(UMTS terrestrial radio access network，UTRAN)，GERAN/UTRAN和SGSN参与了终端设备在4G与2G/3G之间进行的异系统移动，包括空闲态的移动和连接态的切换等。
如图2所示，为本申请适用的另一种可能的4G-5G互操作网络架构示意图，如图2所示，不同于4G网络架构，在网络架构4G-5G互操作网络架构中还包括5G网络架构中的统一数据管理(unified data management，UDM)、第五代无线接入网(NG-RAN)、接入和移动性管理功能实体(access and mobility management function，AMF)、用户面功能实体(user plane function，UPF)、会话管理功能实体(session management function，SMF)等网元。其中，为了更好的实现4G-5G互操作，使得业务连续性更好，会选择4G-5G融合网关，即4G的PGW-C(PGW网关的控制面)和5G的SMF是融合的(SMF+PGW-C)，4G的PGW-U(PGW网关的用户面)和5G的UPF是融合的(UPF+PGW-U)，这样终端设备在4G接入，建立EPS承载时，如果终端设备已启动接入5G网络的能力，融合网关不仅可以分配4G网络的EPS承载参数，还可以分配与之关联的5G网络的PDU会话参数；终端设备在5G接入，建立PDU会话时，融合网关不仅可以分配5G网络的PDU会话参数，还可以分配与之关联的4G网络的EPS承载参数。这样在4G-5G互操作时，EPS承载与PDU会话就可以很好地进行转换，不需要重新建立，保持了业务连续性。
如上的图1和图2所示网络架构，均可作为本申请所适用的网络架构。当然以上几种 网络架构只是示例，本申请不限于适用在以上网络架构。
在介绍本申请实施例之前，首先对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、终端设备，包括向用户提供语音和/或数据连通性的设备，例如可以包括具有无线连接功能的手持式设备、或连接到无线调制解调器的处理设备。该终端设备可以经无线接入网(radio access network，RAN)与核心网进行通信，与RAN交换语音和/或数据。该终端设备可以包括UE、无线终端设备、移动终端设备、设备到设备通信(device-to-device，D2D)终端设备、V2X终端设备、机器到机器/机器类通信(machine-to-machine/machine-type communications，M2M/MTC)终端设备、物联网(internet of things，IoT)终端设备、订户单元(subscriber unit)、订户站(subscriber station)，移动站(mobile station)、远程站(remote station)、接入点(access point，AP)、远程终端(remote terminal)、接入终端(access terminal)、用户终端(user terminal)、用户代理(user agent)、或用户装备(user device)等。例如，可以包括移动电话(或称为“蜂窝”电话)，具有移动终端设备的计算机，便携式、袖珍式、手持式、计算机内置的移动装置等。例如，个人通信业务(personal communication service，PCS)电话、无绳电话、会话发起协议(session initiation protocol，SIP)话机、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、等设备。还包括受限设备，例如功耗较低的设备，或存储能力有限的设备，或计算能力有限的设备等。例如包括条码、射频识别(radio frequency identification，RFID)、传感器、全球定位系统(global positioning system，GPS)、激光扫描器等信息传感设备。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备或智能穿戴式设备等，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能头盔、智能首饰等。
而如上介绍的各种终端设备，如果位于车辆上(例如放置在车辆内或安装在车辆内)，都可以认为是车载终端设备，车载终端设备例如也称为车载单元(on-board unit，OBU)。
本申请实施例中，终端设备还可以包括中继(relay)。或者理解为，能够与基站进行数据通信的都可以看作终端设备。
2)、N1能力，指终端设备支持通过5G非接入层(non access stratum，NAS)协议接入5G网络的能力，也称为接入5G网络的能力，还可以称为N1模式能力(N1mode capability)。
3)、S1能力，指终端设备支持通过4G NAS协议接入4G网络的能力，也称为接入4G网络的能力，还可以称为S1模式能力(S1mode capability)，或者演进的通用陆基无线接入能力(E-UTRA capability)。
4)、3GPP TS 24.501协议，3GPP TS 24.501协议规定了终端设备在5G下发生了某些场景(例如IMS注册失败等)，终端设备需要禁用(disable)N1能力，也即终端设备不支持N1能力。根据3GPP TS 24.501协议4.9.2章节，终端设备Disable N1后，会尝试搜网到 4G的长期演进(long term evolution，LTE)网络，如果搜网成功，会驻留在LTE网络，发起附着(attach)请求或者跟踪区域更新(tracking area update，TAU)请求，告知网络关闭N1能力。并规定终端设备在Disable N1关闭N1能力之后，在LTE下建立的EPS承载，不会在分组数据网(packet data network，PDN)连接请求(PDN connectivity request)消息中携带协议数据单元(protocol data unit，PDU)会话标识信息(5G下不同的PDU会话通过PDU会话标识来唯一标识)，因为协议规定只有支持N1能力，终端设备才需要携带PDU会话标识，这就使得网络向终端设备下发缺省承载激活请求时只会携带4G网络的EPS承载参数，不会携带关联的5G网络的PDU会话参数。
另外，3GPP TS 24.501协议还规定在语音中心改为数据中心、N1模式重新启用(N1mode re-enable)定时器超时等场景下，终端设备重新启用(re-enable)N1能力，终端设备对应的这些没有关联PDU会话参数的EPS承载，在终端设备从4G网络异系统移动到5G网络后，无法映射出EPS承载所关联的PDU会话，导致EPS承载被释放，造成业务中断，用户体验很差。并且随着5G独立组网(standalone，SA)商用后，会越来越多出现上述问题场景。
如图3所示，为终端设备禁用接入5G网络的能力后，驻留在LTE网络的过程示意图。
S301：终端设备在禁用N1能力后(即禁用接入5G网络的能力后，例如，可参考3GPP TS 24.501协议提到的场景)，会尝试搜网到LTE网络，如果搜网成功，终端设备驻留在LTE网络。
S302：终端设备成功驻留LTE网络后，终端设备发起attach或TAU流程，例如，终端设备向网络发送attach请求(request)或TAU request消息。其中attach请求(request)或TAU request消息中的终端设备网络能力(network capability)信元被设置为N1不支持模式(N1mode not supported)，指示终端设备不支持N1能力，也即不支持接入5G网络的能力。
S303：当终端设备上的某一个或多个应用被启动时，触发终端设备请求建立一个新的PDN连接。
S304：终端设备向网络发起PDN连接建立请求消息，由于终端设备不支持N1能力，终端设备不会生成PDU会话标识信息(如PDU session ID)，并不会在PDN连接请求消息中携带PDU会话标识信息。
需要理解的是，在本申请实施例中，网络可以是指网络侧的某一个或多个网元，例如网络可以代指位于网络侧的移动管理网元(如MME)、网关网元(如SGW和/或PGW)等。
具体的，终端设备向网络侧的移动管理网元(如MME)发送的PDN连接建立请求(PDN connectivity request)消息(如图中S304a)中不会携带PDU会话标识信息，移动管理网元向网关网元(如SGW和/或PGW)发送的创建会话请求(create session request)消息(如图中S304b)中也不会携带PDU会话标识信息。
S305：网络向终端设备下发缺省承载建立请求消息，缺省承载建立请求消息中不会携带PDU会话参数。
具体的，网关网元向移动管理网元下发创建会话响应(create session response)消息(如图中S305a)，移动管理网元在接收到网关网元下发的创建会话响应消息后，向终端设备下发不携带PDU会话参数的激活默认EPS承载上下文请求(activate default EPS bearer context  request)消息(如图中S305b)。
其中，如果网络中的网关网元为4G网络架构的网关(SGW和/或PGW)，网关网元不会生成PDU会话参数，如果网络中的网关网元为4G-5G融合网关(SGW和/或PGW)，因4G-5G融合网关没有收到终端设备的PDU会话标识信息，则认为该新建的PDN连接不支持与5G的互操作，也即该新建的PDN连接不会被映射到5G的PDU会话，故在该步骤中，4G-5G融合网关也不会生成PDU会话参数。
S306：终端设备向网络回复缺省承载激活成功，建立EPS承载。
具体的，终端设备向移动管理网元回复激活默认EPS承载上下文接受(activate default EPS bearer context accept)消息(如图中S306a)，移动管理网元在接收到终端设备回复的激活默认EPS承载上下文接受消息后，向网关网元发送修改承载请求(modify bearer request)消息(如图中S306b)，网关网元根据所述修改承载请求消息，向移动管理网元发出修改承载响应(modify bearer response)消息(如图中S306c)，终端设备建立EPS承载完成。
S307：终端设备重新启用N1能力(即启用接入5G网络的能力)。
例如，在3GPP TS 24.501协议规定的某些场景下(例如语音中心改为数据中心、N1mode re-enable定时器超时等)，终端设备重新Enable N1能力(即启用接入5G网络的能力)。
S308：终端设备因为无线能力改变而发起TAU流程并成功执行，发送TAU request消息。其中TAU request消息中的终端设备network capability信元被设置N1为支持模式(N1mode supported)，指示网络终端设备支持N1能力。而终端设备在无线能力包括启用N1能力(即启用接入5G网络的能力)后，在终端设备从4G网络异系统移动到5G网络后，根据现有技术的方案将无法映射出EPS承载所关联的PDU会话，导致EPS承载被释放，造成业务中断，影响用户体验。
本申请旨在解决现有技术中终端设备在禁用接入5G网络的能力后建立的EPS承载，在终端设备启动接入5G网络的能力后，异系统移动到5G网络，由于没有关联的PDU会话参数，无法映射出EPS承载所关联的PDU会话，导致EPS承载被释放，造成业务中断，影响用户体验的问题。
此外，本申请的方案并不限于4G和5G网络之间的切换场景。本申请同样适用于如下场景：当终端设备在禁用接入第一网络的能力后建立的第二网络的数据通道，在终端设备启动接入第一网络的能力后，异系统移动到第一网络。
另外，需要理解，在本申请实施例中，至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本申请不做限制。在本申请实施例中，“/”可以表示前后关联的对象是一种“或”的关系，例如，A/B可以表示A或B；“和/或”可以用于描述关联对象存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A，B可以是单数或者复数。为了便于描述本申请实施例的技术方案，在本申请实施例中，可以采用“第一”、“第二”等字样对功能相同或相似的技术特征进行区分。该“第一”、“第二”等字样并不对数量和执行次序进行限定，并且“第一”、“第二”等字样也并不限定一定不同。在本申请实施例中，“示例性的”或者“例如”等词用于表示例子、例证或说明，被描述为“示例性的”或者“例如”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。使用“示例性的”或者“例如”等词旨在以具体方式呈现相关概念，便于理解。
下面结合附图详细说明本申请实施例。
图4为本申请实施例提供的一种承载处理过程示意图，该过程包括：
S401：终端设备在启用接入5G网络的能力后，向移动管理网元发送第一消息，所述移动管理网元接收所述第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息。
其中，所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后(disabled)建立的。
在本申请实施例中，终端设备先被禁用接入5G网络的能力，然后建立4G网络EPS承载，之后在启用接入5G网络的能力后，向移动管理网元发起承载修改流程，以获取4G网络EPS承载关联的PDU会话参数，从而实现终端设备异系统移动到5G网络后，可以根据所述PDU会话参数将4G网络EPS承载无缝转换(transfer)，或映射(map)到5G网络的PDU会话。本申请实施例可以适用于4G-5G融合网络架构，所涉及的移动管理网元可以是MME等；所涉及的网关网元可以是融合网关，如SMF+PGW-C等。
在一种可能的实施中，如果终端设备在禁用接入5G网络的能力后建立有EPS承载(即没有关联PDU会话参数的EPS承载)，终端设备在启用接入5G网络的能力后，可以主动发起承载修改流程，向移动管理网元发送第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息。作为一种示例，所述第一消息可以为承载资源修改请求(bearer resource modification request)消息，并在该消息中携带有4G网络EPS承载关联的PDU会话标识信息，如PDU会话(session)身份标识(identity，ID)。
另外，因为终端设备在禁用接入5G网络的能力后，发起PDN连接建立4G网络EPS承载时，可能会选择到如图1所示的4G网关，也可能选择到如图2所示的4G-5G融合网关，而4G网关并不能根据PDU会话标识信息为终端设备建立的4G网络EPS承载分配对应PDU会话参数。因此为了避免额外的信令开销，当网络支持处理所述PDU会话标识信息时，即网络对应的网关网元为4G-5G融合网关时，可以在终端设备建立4G网络EPS承载的过程中，或在终端设备建立4G网络EPS承载后，由网络侧的移动管理网元向终端设备发送包括指示信息的第三消息，该指示信息用于指示网络能够处理PDU会话标识信息。
作为一种示例，所述第三消息可以为激活承载上下文请求消息。例如：在终端设备向移动管理网元发送PDN连接请求消息后，移动管理网元在向终端设备发送的激活缺省EPS承载上下文请求消息中携带上述指示信息。
S402：所述移动管理网元向网关网元发送承载资源命令消息，所述网关网元接收所述承载资源命令消息，所述承载资源命令消息包括所述PDU会话标识信息。
S403：所述网关网元向所述移动管理网元发送更新承载请求消息，所述移动管理网元接收所述更新承载请求消息，所述更新承载请求消息包括为所述EPS承载分配的PDU会话参数。
移动管理网元在接收到终端设备发送的包括PDU会话标识信息的第一消息后，向网关网元发送包括所述PDU会话标识信息的承载资源命令(bearer resource command)消息，从而指示网关网元对所述PDU会话标识信息进行处理，为终端设备对应的4G网络EPS承载分配PDU会话参数。
网关网元接收到包含所述PDU会话标识信息的承载资源命令后，根据所述PDU会话 标识信息为终端设备对应的4G网络EPS承载分配PDU会话参数，并通过更新承载请求(update bearer request)消息发送给移动管理网元。其中所述PDU会话参数包括单网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)、服务质量(quality of service，QoS)流描述(QoS flow descriptions)、QoS规则(QoS rules)、会话聚合最大比特率(session-aggregate maximum bit rate，session-AMBR)等中的一项或多项。
S404：所述移动管理网元向所述终端设备发送第二消息，所述终端设备接收所述第二消息，所述第二消息包括所述PDU会话参数。
具体的，移动管理网元接收到网关网元发送的更新承载请求消息后，通过第二消息，将包含为终端设备对应的4G网络EPS承载分配的PDU会话参数发送给终端设备。作为一种示例，所述第二消息可以为修改承载上下文请求消息(modify bearer context request)或激活承载上下文请求消息等。
在一种可能的实施中，终端设备接收到第二消息后，还可以向移动管理网元发送修改承载上下文接受(modify bearer context accept)消息，告知移动管理网元修改4G网络EPS承载上下文成功，移动管理网元还可以向网关网元发送更新承载响应(update bearer response)消息，告知网关网元终端设备修改4G网络EPS承载上下文成功。
终端设备保存第二消息包括的4G网络EPS承载所关联的PDU会话参数，当终端设备异系统移动到5G网络后，可以根据所述PDU会话参数，将4G网络EPS承载无缝转换(或映射)到5G网络PDU会话的QoS流(QoS flow)，避免终端设备业务的中断。
在上述图4的方案中，在禁用接入5G网络的能力后建立有4G网络EPS承载终端设备在启用接入5G网络的能力后，主动发起承载资源修改请求，以获得PDU会话参数。考虑到终端设备在禁用接入5G网络的能力后，发起PDN连接建4G网络EPS承载时，可能会选择到如图1所示的4G网关，也可能选择到如图2所示的4G-5G融合网关，本申请实施例还提供一种承载处理方案，以应对终端设备选择到如图1所示的4G网关或如图2所示的4G-5G融合网关等场景。
图5为本申请实施例提供的一种承载处理过程示意图，该过程包括：
S501：终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载。
其中，所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的。
在本申请实施例中，禁用接入5G网络的能力后建立有4G网络EPS承载的终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载，并向移动管理网元重新发送包括所述4G网络EPS承载关联的PDU会话标识信息，以获取4G网络EPS承载关联的PDU会话参数，从而实现终端设备异系统移动到5G网络后，可以根据所述PDU会话参数将4G网络EPS承载无缝转换(或映射)到5G网络PDU会话的QoS流，可以适用于终端设备在禁用接入5G网络的能力后建立的4G网络EPS承载时，移动管理网元选择到如图1所示的4G网关或如图2所示的4G-5G融合网关等场景。
另外，需要理解是，如果终端设备在禁用接入5G网络的能力后建立4G网络EPS承载时，移动管理网元连接(或选择)到4G网关，则终端设备在去激活4G网络EPS承载时对应的网关网元为4G网关，如果终端设备在禁用接入5G网络的能力后建立4G网络EPS承载时，移动管理网元连接到4G-5G融合网关，则终端设备在去激活4G网络EPS承载时对应的网关网元为4G-5G融合网关。并且无论终端设备在去激活4G网络EPS承载时 对应的网关网元为4G网关，还是4G-5G融合网关。后续，在终端设备携带PDU会话标识信息发起的PDN连接流程中，移动管理网元连接的网关网元均为4G-5G融合网关。
为了便于说明，在本申请实施例中，可以将终端设备在禁用接入5G网络的能力后建立的4G网络EPS承载对应的网关网元称为第一网关网元；将终端设备启用接入5G网络的能力后，重新建立PDN连接流程对应的网关网元称为第二网关网元。其中，第一网关网元可以为4G网关(如PGW等)，也可以为4G-5G融合网关(如SMF+PGW-C等)；第二网关网元为4G-5G融合网关(如SMF+PGW-C等)。
在一种可能的实施中，所述去激活4G网络EPS承载，可以由终端设备在启用接入5G网络的能力后主动发起。
示例的：如图6所示，终端设备在启用接入5G网络的能力后，可以向移动管理网元发送PDN连接分离请求(PDN disconnect request)消息，移动管理网元接收终端设备发送的PDN连接分离请求消息后，向第一网关网元发送删除会话请求(delete session request)消息，请求网关网元删除所述EPS承载。移动管理网元接收到第一网关网元回复的删除会话响应(delete session response)消息后，向终端设备发送去激活EPS承载上下文请求(deactivate EPS bearer context request)消息，指示终端设备去激活所述EPS承载，并接收终端设备回复的去激活EPS承载上下文接受(deactivate EPS bearer context accept)消息，完成去激活所述EPS承载。
另外，为了避免去激活4G网络EPS承载影响终端设备的业务传输，终端设备可以在一段时间内没有上下行信令和数传包传输，网络设备主动释放链路让终端设备进入空闲态(IDLE)后，去激活4G网络EPS承载。
在另一种可能的实施中，终端设备去激活4G网络EPS承载可以由网络指示发起。
方式一：由移动管理网元发送去激活承载上下文请求并生成重新激活承载的指示信息。
示例的：如图7所示，对于在接入5G网络的能力被禁用后建立有4G网络EPS承载的终端设备，移动管理网元在图3所示S308的TAU流程中获知终端设备支持接入5G网络的能力，也即支持N1能力后，向第一网关网元发送删除承载命令(delete bearer command)消息，命令第一网关网元删除所述EPS承载；在接收到第一网关网元回复的删除承载请求(delete bearer request)消息后，向终端设备发送包括用于指示所述终端设备重新激活承载(reactivation requested)的指示信息的去激活承载上下文请求(deactivate bearer context request)消息，终端设备在接收到去激活承载上下文请求消息后，去激活所述EPS承载，并向移动管理网元回复去激活EPS承载上下文接受(deactivate EPS bearer context accept)消息，移动管理网元向第一网关网元发送删除承载响应(delete bearer response)消息，完成删除所述EPS承载。
需要理解的是，上述删除EPS承载，也可以称为去激活EPS承载；同样上述去激活EPS承载，也可以称为删除EPS承载。上述去激活EPS承载和删除EPS承载含义相同均为终止EPS承载的激活状态，去激活和删除仅是在不同消息和/或不同网元中所用的不同描述。
方式二：由第一网关网元发送删除承载请求并生成重新激活承载的指示信息。
示例的：如图8所示，对于在接入5G网络的能力被禁用后建立有4G网络EPS承载的终端设备，移动管理网元在图3所示S308的TAU流程中获知终端设备支持接入5G网 络的能力，也即支持N1能力后，向第一网关网元发送第四消息，所述第四消息包括所述终端设备支持接入5G网络的能力的信息；第一网关网元接收到第四消息后，获知终端设备支持接入5G网络的能力。在图3所示S308的TAU流程完成后，第一网关网元向移动管理网元发送包括重新激活承载(reactivation requested)的指示信息的删除承载请求(delete bearer request)消息，请求移动管理网元删除所述没有关联PDU会话参数的EPS承载，进而移动管理网元向终端设备发送包括用于指示所述终端设备重新激活承载(reactivation requested)的指示信息的去激活承载上下文请求(deactivate bearer context request)消息，终端设备在接收到去激活承载上下文请求消息后，去激活所述EPS承载，并向移动管理网元回复去激活承载上下文接受(deactivate bearer context accept)消息，移动管理网元向第一网关网元发送删除承载响应(delete bearer response)消息，完成删除所述EPS承载。
作为一种示例，所述第四消息可以为修改承载请求(modify bearer request)消息。
另外，在3GPP TS 24.301协议中规定，通过原因值“39”触发终端设备(如UE)本地释放EPS承载，并再次发起PDN连接建立请求，对原因值39的处理，3GPP TS 24.301协议描述为“If the DEACTIVATE EPS BEARER CONTEXT REQUEST includes ESM cause #39"reactivation requested"and the EPS bearer context is a default EPS bearer context,and the UE provided an APN for the establishment of the PDN connection,the UE shall stop timer T3396if it is running for the APN provided by the UE.The UE should then re-initiate the UE requested PDN connectivity procedure for the same APN as the deactivated default EPS bearer context to reactivate the EPS bearer context”。因此，在本申请中图7或图8中去激活承载上下文请求消息携带的重新激活承载的指示信息可以采用原因值“39”指示。
回到图5，S502：所述终端设备向移动管理网元发送PDN连接请求消息，所述PDN连接请求消息包括所述EPS承载关联的PDU会话标识信息。
终端设备去激活4G网络EPS承载后，向移动管理网元发送PDN连接请求(PDN connectivity request)消息，由于终端设备已经支持接入5G网络的能力(即N1能力)，因此会生成并在PDN连接请求消息中携带所述EPS承载关联的PDU会话标识信息。移动管理网元接收到终端设备发送的包括所述PDU会话标识信息的PDN连接请求(PDN connectivity request)消息后，向第二网关网元发送包含所述PDU会话标识信息的创建会话请求(create session request)消息。
第二网关网元接收到包括所述PDU会话标识信息的创建会话请求消息后，根据所述PDU会话标识信息为终端设备对应的4G网络EPS承载分配PDU会话参数，并通过创建会话响应(create session response)消息发送给移动管理网元。其中所述PDU会话参数包括S-NSSAI、QoS流描述、QoS规则、session-AMBR等中的一项或多项。
S503：所述终端设备接收来自所述移动管理网元的激活承载上下文请求消息，所述激活承载上下文请求消息包括为所述EPS承载分配的PDU会话参数。
例如，移动管理网元接收到第二网关网元发送的创建会话响应消息后，通过激活承载上下文请求消息，将包含为终端设备的4G网络EPS承载分配的PDU会话参数发送给终端设备。
作为一种示例，所述激活承载上下文请求消息可以为激活默认承载上下文请求(activate default bearer context request)消息。
在一种可能的实施中，终端设备接收到激活承载上下文请求消息后，还可以告知网络 4G网络EPS承载激活成功。具体的，终端设备可以向移动管理网元发送激活默认承载上下文接受(activate default bearer context accept)消息，告知移动管理网元已激活4G网络EPS承载，移动管理网元还可以通过修改承载请求(modify bearer request)消息告知第二网关网元终端设备4G网络EPS承载激活成功，并接收第二网关网元回复的修改承载响应(modify bearer response)消息。
终端设备获得4G网络EPS承载关联PDU会话参数后，当终端设备异系统移动到5G网络后，可以根据所述PDU会话参数，将4G网络EPS承载无缝转换(或映射)到5G网络PDU会话的QoS flow，避免终端设备业务的中断。
另外，需要理解的是，上述各网元(如终端设备、移动管理网元、网关网元等)之间交互的消息的名称仅为一种示例，本申请实施例中，并不限定上述各网元(如终端设备、移动管理网元、网关网元等)之间交互的消息的名称。
上述主要从终端设备和移动管理网元之间交互的角度对本申请提供的方案进行了介绍。可以理解的是，为了实现上述功能，各网元包括了执行各个功能相应的硬件结构和/或软件模块(或单元)。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
在采用集成的单元(模块)的情况下，图9示出了本申请实施例中所涉及的一种承载处理装置的可能的示例性框图，该承载处理装置900可以以软件的形式存在。装置900可以包括：处理单元902和收发单元903。
一种可能的设计中，处理单元902用于实现相应的处理功能。收发单元903用于支持装置900与其他网络实体的通信。可选地，收发单元903可以包括接收单元和/或发送单元，分别用于执行接收和发送操作。可选的，装置900还可以包括存储单元901，用于存储装置900的程序代码和/或数据。
该装置900可以为上述任一实施例中的终端设备、或者还可以为设置在终端设备中的芯片等部件。处理单元902可以支持装置900执行上文中各方法示例中终端设备的动作。或者，处理单元902主要执行方法示例中的终端设备内部动作，收发单元903可以支持装置900与移动管理网元等之间的通信。
具体地，在一个实施例中，所述处理单元902，用于在启用接入5G网络的能力后，通过所述收发单元903向移动管理网元发送第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息，其中所述EPS承载为终端设备在所述接入5G网络的能力被禁用后建立的；
所述处理单元902，还用于通过所述收发单元903接收来自所述移动管理网元的第二消息，所述第二消息包括为所述EPS承载分配的PDU会话参数。
在一种可能的设计中，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
在一种可能的设计中，所述处理单元902，还用于通过所述收发单元903在向移动管理网元发送第一消息前，接收来自所述移动管理网元的第三消息，所述第三消息包括网络 能够处理所述PDU会话标识信息的指示信息。
在一种可能的设计中，所述第三消息为激活承载上下文请求消息。
在一种可能的设计中，所述第一消息为承载资源修改请求消息。
在一种可能的设计中，所述第二消息为修改承载上下文请求消息或激活承载上下文请求消息。
在一种可能的设计中，所述PDU会话参数包括以下中的至少一项：
切片信息、服务质量QoS流描述、QoS规则、会话最大比特率汇聚。
在另一个实施例中，所述处理单元902，用于在启用接入5G网络的能力后，通过所述收发单元903去激活4G网络EPS承载，其中所述EPS承载为终端设备在所述接入5G网络的能力被禁用后建立的；
所述处理单元902，还用于通过所述收发单元903向移动管理网元发送PDN连接请求消息，所述PDN连接请求消息包括所述EPS承载关联的PDU会话标识信息；
所述处理单元902，还用于通过收发单元903接收来自所述移动管理网元的激活承载上下文请求消息，所述激活承载上下文请求消息包括为所述EPS承载分配的PDU会话参数。
在一种可能的设计中，所述处理单元902在启用接入5G网络的能力后，通过所述收发单元903去激活4G网络EPS承载时，具体用于通过所述收发单元903接收来自所述移动管理网元的去激活承载上下文请求消息；根据所述去激活承载上下文请求消息去激活所述EPS承载。
在一种可能的设计中，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息；
所述处理单元902通过所述收发单元903向移动管理网元发送PDN连接请求消息时，具体用于根据所述指示信息通过收发单元903向所述移动管理网元发送PDN连接请求消息。
在一种可能的设计中，所述处理单元902在启用接入5G网络的能力后，通过所述收发单元903去激活4G网络EPS承载时，具体用于通过收发单元903向所述移动管理网元发送PDN连接分离请求消息；接收来自所述移动管理网元的去激活承载上下文请求消息；根据所述去激活承载上下文请求消息去激活所述EPS承载。
在一种可能的设计中，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
在一种可能的设计中，所述PDU会话参数包括以下中的至少一项：
切片信息、服务质量QoS流描述、QoS规则、会话最大比特率汇聚。
如图10所示，本申请实施例还提供一种承载处理装置1000，该承载处理装置1000包括处理器1010与收发器1030，还可以包括存储器1020。一种可能的设计中，存储器1020中存储指令或程序或数据，存储器1020可以用于实现上述实施例中存储单元901的功能。处理器1010用于读取存储器1020中存储的指令或程序或数据。存储器1020中存储的指令或程序被执行时，该处理器1010用于执行上述实施例中处理单元902执行的操作，收发器1030用于执行上述实施例中收发单元903执行的操作。
在采用集成的单元(模块)的情况下，图11示出了本申请实施例中所涉及的又一种承 载处理装置的可能的示例性框图，该承载处理装置1100可以以软件的形式存在。装置1100可以包括：处理单元1102和收发单元1103。一种可能的设计中，处理单元1102用于实现相应的处理功能。收发单元1103用于支持装置1100与其他网络实体的通信。可选地，收发单元1103可以包括接收单元和/或发送单元，分别用于执行接收和发送操作。可选的，装置1100还可以包括存储单元1101，用于存储装置1100的程序代码和/或数据。
该装置1100可以为上述任一实施例中的移动管理网元、或者还可以为设置在移动管理网元中的芯片等部件。处理单元1102可以支持装置1100执行上文中各方法示例中移动管理网元的动作。或者，处理单元1102主要执行方法示例中的移动管理网元内部动作，收发单元1103可以支持装置1100与终端设备等之间的通信。
具体地，在一个实施例中，所述处理单元1102，用于通过所述收发单元1103接收来自终端设备的第一消息，所述第一消息包括4G网络EPS承载关联的PDU会话标识信息，其中所述EPS承载为所述终端设备在接入5G网络的能力被禁用后建立的；
所述处理单元1102，还用于通过所述收发单元1103向网关网元发送承载资源命令消息，所述承载资源命令消息包括所述PDU会话标识信息；以及接收来自所述网关网元的更新承载请求消息，所述更新承载请求消息包括为所述EPS承载分配的PDU会话参数；
所述处理单元1102，还用于通过所述收发单元1103向所述终端设备发送第二消息，所述第二消息包括所述PDU会话参数。
在一种可能的设计中，所述PDU会话参数是所述网关网元根据所述PDU会话标识信息为所述EPS承载分配的。
在一种可能的设计中，所述处理单元1102，还用于通过所述收发单元1103向所述终端设备发送第三消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
在一种可能的设计中，所述第三消息为激活承载上下文请求消息。
在一种可能的设计中，所述第一消息为承载资源修改请求消息。
在一种可能的设计中，所述第二消息为修改承载上下文请求消息或激活承载上下文请求消息。
在一种可能的设计中，所述PDU会话参数包括以下中的至少一项：
切片信息、服务质量QoS流描述、QoS规则、会话最大比特率汇聚。
在另一个实施例中，所述处理单元1102，用于确定建立有4G网络EPS承载的终端设备启用接入5G网络的能力，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；
所述处理单元1102，还用于通过所述收发单元1103向所述终端设备发送去激活承载上下文请求消息，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息。
在一种可能的设计中，所述处理单元1102通过所述收发单元1103向所述终端设备发送去激活承载上下文请求消息前，还用于通过所述收发单元1103向网关网元发送第四消息，所述第四消息包括所述终端设备支持接入5G网络的能力的信息；接收来自所述网关网元的删除承载请求消息，所述删除承载请求消息包括用于指示所述终端设备重新激活承载的指示信息。
如图12所示，本申请实施例还提供一种承载处理装置1200，该承载处理装置1200包 括处理器1210与收发器1230，还可以包括存储器1220。一种可能的设计中，存储器1220中存储指令或程序或数据，存储器1220可以用于实现上述实施例中存储单元1101的功能。处理器1210用于读取存储器1220中存储的指令或程序或数据。存储器1220中存储的指令或程序被执行时，该处理器1210用于执行上述实施例中处理单元1102执行的操作，收发器1230用于执行上述实施例中收发单元1103执行的操作。
上述的处理器可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器还可以进一步包括硬件芯片或其他通用处理器。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)及其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等或其任意组合。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
还应理解，本申请实施例中提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本申请描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
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可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请实施例的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (34)

  1. 一种承载处理方法，其特征在于，包括：
    终端设备在启用接入5G网络的能力后，向移动管理网元发送第一消息，所述第一消息包括4G网络演进分组系统EPS承载关联的协议数据单元PDU会话标识信息，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；
    所述终端设备接收来自所述移动管理网元的第二消息，所述第二消息包括为所述EPS承载分配的PDU会话参数。
  2. 如权利要求1所述的方法，其特征在于，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
  3. 如权利要求1所述的方法，其特征在于，所述向移动管理网元发送第一消息前，所述方法还包括：
    所述终端设备接收来自所述移动管理网元的第三消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
  4. 一种承载处理方法，其特征在于，包括：
    移动管理网元接收来自终端设备的第一消息，所述第一消息包括4G网络演进分组系统EPS承载关联的协议数据单元PDU会话标识信息，其中所述EPS承载为所述终端设备在接入5G网络的能力被禁用后建立的；
    所述移动管理网元向网关网元发送承载资源命令消息，所述承载资源命令消息包括所述PDU会话标识信息；
    所述移动管理网元接收来自所述网关网元的更新承载请求消息，所述更新承载请求消息包括为所述EPS承载分配的PDU会话参数；
    所述移动管理网元向所述终端设备发送第二消息，所述第二消息包括所述PDU会话参数。
  5. 如权利要求4所述的方法，其特征在于，所述PDU会话参数是所述网关网元根据所述PDU会话标识信息为所述EPS承载分配的。
  6. 如权利要求4所述的方法，其特征在于，所述方法还包括：
    所述移动管理网元向所述终端设备发送第三消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
  7. 如权利要求3或6所述的方法，其特征在于，所述第三消息为激活承载上下文请求消息。
  8. 如权利要求1-7中任一项所述的方法，其特征在于，所述第一消息为承载资源修改请求消息。
  9. 如权利要求1-8中任一项所述的方法，其特征在于，所述第二消息为修改承载上下文请求消息或激活承载上下文请求消息。
  10. 如权利要求1-9中任一项所述的方法，其特征在于，所述PDU会话参数包括以下中的至少一项：
    切片信息、服务质量QoS流描述、QoS规则、会话最大比特率汇聚。
  11. 一种承载处理方法，其特征在于，包括：
    终端设备在启用接入5G网络的能力后，去激活4G网络演进分组系统EPS承载，其 中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；
    所述终端设备向移动管理网元发送分组数据网PDN连接请求消息，所述PDN连接请求消息包括所述EPS承载关联的协议数据单元PDU会话标识信息；
    所述终端设备接收来自所述移动管理网元的激活承载上下文请求消息，所述激活承载上下文请求消息包括为所述EPS承载分配的PDU会话参数。
  12. 如权利要求11所述的方法，其特征在于，所述终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载，包括：
    所述终端设备接收来自所述移动管理网元的去激活承载上下文请求消息；
    所述终端设备根据所述去激活承载上下文请求消息去激活所述EPS承载。
  13. 如权利要求12所述的方法，其特征在于，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息；
    所述终端设备向移动管理网元发送PDN连接请求消息，包括：
    所述终端设备根据所述指示信息向所述移动管理网元发送PDN连接请求消息。
  14. 如权利要求11所述的方法，其特征在于，所述终端设备在启用接入5G网络的能力后，去激活4G网络EPS承载，包括：
    所述终端设备向所述移动管理网元发送PDN连接分离请求消息；
    所述终端设备接收来自所述移动管理网元的去激活承载上下文请求消息；
    所述终端设备根据所述去激活承载上下文请求消息去激活所述EPS承载。
  15. 如权利要求11所述的方法，其特征在于，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
  16. 如权利要求11-15中任一项所述的方法，其特征在于，所述PDU会话参数包括以下中的至少一项：
    切片信息、服务质量QoS流描述、QoS规则、会话最大比特率汇聚。
  17. 一种承载处理方法，其特征在于，包括：
    移动管理网元确定建立有4G网络演进分组系统EPS承载的终端设备启用接入5G网络的能力，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；
    所述移动管理网元向所述终端设备发送去激活承载上下文请求消息，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息。
  18. 如权利要求17所述的方法，其特征在于，所述移动管理网元向所述终端设备发送去激活承载上下文请求消息前，所述方法还包括：
    所述移动管理网元向网关网元发送第四消息，所述第四消息包括所述终端设备支持接入5G网络的能力的信息；
    所述移动管理网元接收来自所述网关网元的删除承载请求消息，所述删除承载请求消息包括用于指示所述终端设备重新激活承载的指示信息。
  19. 一种承载处理装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于在启用接入5G网络的能力后，通过所述收发单元向移动管理网元发送第一消息，所述第一消息包括4G网络演进分组系统EPS承载关联的协议数据单元PDU会话标识信息，其中所述EPS承载为终端设备在所述接入5G网络的能力被禁用后建立的；
    所述处理单元，还用于通过所述收发单元接收来自所述移动管理网元的第二消息，所 述第二消息包括为所述EPS承载分配的PDU会话参数。
  20. 如权利要求19所述的装置，其特征在于，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
  21. 如权利要求19所述的装置，其特征在于，所述处理单元，还用于通过所述收发单元在向移动管理网元发送第一消息前，接收来自所述移动管理网元的第三消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
  22. 一种承载处理装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于通过所述收发单元接收来自终端设备的第一消息，所述第一消息包括4G网络演进分组系统EPS承载关联的协议数据单元PDU会话标识信息，其中所述EPS承载为所述终端设备在接入5G网络的能力被禁用后建立的；
    所述处理单元，还用于通过所述收发单元向网关网元发送承载资源命令消息，所述承载资源命令消息包括所述PDU会话标识信息；以及接收来自所述网关网元的更新承载请求消息，所述更新承载请求消息包括为所述EPS承载分配的PDU会话参数；
    所述处理单元，还用于通过所述收发单元向所述终端设备发送第二消息，所述第二消息包括所述PDU会话参数。
  23. 如权利要求22所述的装置，其特征在于，所述PDU会话参数是所述网关网元根据所述PDU会话标识信息为所述EPS承载分配的。
  24. 如权利要求22所述的装置，其特征在于，所述处理单元，还用于通过所述收发单元向所述终端设备发送第三消息，所述第三消息包括网络能够处理所述PDU会话标识信息的指示信息。
  25. 一种承载处理装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于在启用接入5G网络的能力后，通过所述收发单元去激活4G网络演进分组系统EPS承载，其中所述EPS承载为终端设备在所述接入5G网络的能力被禁用后建立的；
    所述处理单元，还用于通过所述收发单元向移动管理网元发送分组数据网PDN连接请求消息，所述PDN连接请求消息包括所述EPS承载关联的协议数据单元PDU会话标识信息；
    所述处理单元，还用于通过收发单元接收来自所述移动管理网元的激活承载上下文请求消息，所述激活承载上下文请求消息包括为所述EPS承载分配的PDU会话参数。
  26. 如权利要求25所述的装置，其特征在于，所述处理单元在启用接入5G网络的能力后，通过所述收发单元去激活4G网络演进分组系统EPS承载时，具体用于通过所述收发单元接收来自所述移动管理网元的去激活承载上下文请求消息；根据所述去激活承载上下文请求消息去激活所述EPS承载。
  27. 如权利要求26所述的装置，其特征在于，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息；
    所述处理单元通过所述收发单元向移动管理网元发送PDN连接请求消息时，具体用于根据所述指示信息通过收发单元向所述移动管理网元发送PDN连接请求消息。
  28. 如权利要求25所述的装置，其特征在于，所述处理单元在启用接入5G网络的能力后，通过所述收发单元去激活4G网络演进分组系统EPS承载时，具体用于通过收发单元向所述移动管理网元发送PDN连接分离请求消息；接收来自所述移动管理网元的去激活 承载上下文请求消息；根据所述去激活承载上下文请求消息去激活所述EPS承载。
  29. 如权利要求25所述的装置，其特征在于，所述PDU会话参数是所述移动管理网元根据所述PDU会话标识信息为所述EPS承载分配的。
  30. 一种承载处理装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元，用于确定建立有4G网络演进分组系统EPS承载的终端设备启用接入5G网络的能力，其中所述EPS承载为所述终端设备在所述接入5G网络的能力被禁用后建立的；
    所述处理单元，还用于通过所述收发单元向所述终端设备发送去激活承载上下文请求消息，所述去激活承载上下文请求消息包括用于指示所述终端设备重新激活承载的指示信息。
  31. 如权利要求30所述的装置，其特征在于，所述处理单元通过所述收发单元向所述终端设备发送去激活承载上下文请求消息前，还用于通过所述收发单元向网关网元发送第四消息，所述第四消息包括所述终端设备支持接入5G网络的能力的信息；接收来自所述网关网元的删除承载请求消息，所述删除承载请求消息包括用于指示所述终端设备重新激活承载的指示信息。
  32. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被承载处理装置执行时，实现如权利要求1-3中任一项所述的方法，或者实现如权利要求4-10中任一项所述的方法，或者实现如权利要求11-16中任一项所述的方法，或者实现如权利要求17-18中任一项所述的方法。
  33. 一种芯片，其特征在于，所述芯片运行时，实现如权利要求1-3中任一项所述的方法，或者实现如权利要求4-10中任一项所述的方法，或者实现如权利要求11-16中任一项所述的方法，或者实现如权利要求17-18中任一项所述的方法。
  34. 一种计算机程序产品，其特征在于，包括计算机程序或指令，当计算机程序或指令被执行时，实现如权利要求1-3中任一项所述的方法，或者实现如权利要求4-10中任一项所述的方法，或者实现如权利要求11-16中任一项所述的方法，或者实现如权利要求17-18中任一项所述的方法。
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