WO2020093377A1 - 一种确定互联网协议版本的方法及装置 - Google Patents

一种确定互联网协议版本的方法及装置 Download PDF

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Publication number
WO2020093377A1
WO2020093377A1 PCT/CN2018/114852 CN2018114852W WO2020093377A1 WO 2020093377 A1 WO2020093377 A1 WO 2020093377A1 CN 2018114852 W CN2018114852 W CN 2018114852W WO 2020093377 A1 WO2020093377 A1 WO 2020093377A1
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Prior art keywords
network element
internet protocol
protocol version
node
request message
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PCT/CN2018/114852
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English (en)
French (fr)
Inventor
董长聪
刘菁
唐美玲
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华为技术有限公司
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Priority to PCT/CN2018/114852 priority Critical patent/WO2020093377A1/zh
Priority to CN201880096382.9A priority patent/CN112534866A/zh
Publication of WO2020093377A1 publication Critical patent/WO2020093377A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/18—Negotiating wireless communication parameters

Definitions

  • This application relates to the field of communication technology, and in particular to a method and device for determining the version of an Internet protocol.
  • 3rd generation partnership project 36.423 protocol (for example: X2 application protocol (X2 application protocol, X2AP)) and 36.463 protocol (for example: Xw interface application protocol (Xw application protocol, XwAP) ),
  • the current definition is used for user plane transmission between network elements through the X2 interface or Xw interface, because it must follow the above 36.424 protocol (for example: X2 interface data transmission (X2 data transmission) and 36.464 protocol (for example: Xw Interface data transmission (Xw data), so neither of the above two interfaces supports the simultaneous implementation of the Internet Protocol (IP) version 4 (ie IPv4) address and the Internet Protocol version 6 (ie IPv6) address Situation, so when a dual-stack network element configured with both IPv4 and IPv6 addresses and a single-stack peer network element configured with only IPv4 or IPv6 addresses are interconnected, the peer's Internet protocol version cannot be predicted, and both ends will appear.
  • IP Internet Protocol
  • IPv6 Internet Protocol version 4
  • the 3GPP 38.424 protocol (for example: Xn interface data transmission) defines the case where the Xn interface supports carrying IPv4 addresses and IPv6 addresses, at present, when establishing a unidirectional forwarding bearer, the network element that receives user plane data needs to At the same time, the resources related to the IPv4 address and the IPv6 address are prepared to receive the information. In this case, the transmission and forwarding resources of the network element receiving the information will be wasted.
  • This application provides a method and device for determining the version of an Internet protocol. It receives a request message through an interface.
  • the request message includes information about the version of the Internet protocol supported by the sender. It solves the problem of dual-stack network elements configured with both IPv4 and IPv6 addresses.
  • the network protocol versions selected by the two end network elements that is, the receiver network element and the sender network element
  • the network element receiving the information needs to prepare both the IPv4 address and the IPv6 address to receive the information. In this case, the transmission and forwarding resources of the network element receiving the information will be wasted.
  • an embodiment of the present application provides a method for determining an Internet protocol version, which may specifically include: a first network element receives a request message sent by a second network element, and the request message includes: an Internet protocol version supported by the second network element information;
  • the first network element determines the Internet protocol version of the transmission message of the first network element and the second network element according to the Internet protocol version information supported by the second network element and the Internet protocol version information supported by the first network element, and generates a response message;
  • This application re-modifies the X2 interface and Xw interface protocols, so that when the user plane forwarding bearer is established between the network elements on both sides, IPv4 addresses and IPv6 addresses can be supported. And receive the request message through the X2 interface, Xn interface or Xw interface, the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and the IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message. It should be noted that this application establishes a user plane forwarding bearer through control plane interaction.
  • the step of "the first network element receives the request message sent by the second network element" specifically includes:
  • the first network element receives the request message sent by the second network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the "first interface" may support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the above-mentioned "first network element” may be an E-UTRAN base station, a base station in 5G, and the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in EN-DC Or, the network element provides the UE with the E-UTRA user plane and control plane and is connected to the 5GC NG-RAN network element;
  • the second network element is an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC.
  • the network element provides the E-UTRA user plane and control plane to the UE And connected to the 5GC NG-RAN network element, or terminal.
  • the terminal may specifically be a wireless local area network terminal (WLAN terminal).
  • the above-mentioned "first network element determines, according to the Internet protocol version information supported by the second network element and the Internet protocol version information supported by the first network element, the The step of transmitting the Internet protocol version of the message and generating a response message may specifically include:
  • the first network element determines the first network element and the second network element based on the Internet protocol version information supported by the second network element, the Internet protocol version information supported by the first network element, and the Internet protocol version priority information supported by the first network element
  • the transmission message and Internet protocol version and generate a response message.
  • an embodiment of the present application provides a method for determining an Internet protocol version, which may specifically include: the second network element sends a request message to the first network element, and the request message includes: Internet protocol version information supported by the second network element ;
  • the second network element receives the response message of the first network element, and the response message includes: an Internet protocol version of the transmission message of the first network element and the second network element.
  • This application re-modifies the X2 interface and Xw interface protocols, so that when the user plane forwarding bearer is established between the network elements on both sides, IPv4 addresses and IPv6 addresses can be supported. And receive the request message through the X2 interface, Xn interface or Xw interface, the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and the IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message. It should be noted that this application establishes a user plane forwarding bearer through control plane interaction.
  • the step of “sending a request message from the second network element to the first network element” may specifically include:
  • the second network element sends a request message to the first network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the "first interface" may support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the above-mentioned "first network element” may be an E-UTRAN base station, a base station in 5G, and the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in EN-DC Or, the network element provides the UE with the E-UTRA user plane and control plane and is connected to the 5GC NG-RAN network element;
  • the second network element is an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC.
  • the network element provides the E-UTRA user plane and control plane to the UE And connected to the 5GC NG-RAN network element, or terminal.
  • the transceiver is used to receive a request message sent by the second network element, the request message includes: Internet protocol version information supported by the second network element;
  • the processor is configured to determine the Internet protocol version of the transmission message of the first network element and the second network element according to the Internet protocol version information supported by the second network element and the Internet protocol version information supported by the first network element, and generate a response message ;
  • the transceiver is also used to send a response message to the second network element.
  • This application re-modifies the X2 interface and Xw interface protocols, so that when the user plane forwarding bearer is established between the network elements on both sides, IPv4 addresses and IPv6 addresses can be supported. And receive the request message through the X2 interface, Xn interface or Xw interface, the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message. It should be noted that this application establishes a user plane forwarding bearer through control plane interaction.
  • the above transceiver is specifically configured to: receive a request message sent by a second network element through a first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the "first interface" may support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the above-mentioned "first network element” may be an E-UTRAN base station, a base station in 5G, and the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in EN-DC Or, the network element provides the UE with the E-UTRA user plane and control plane and is connected to the 5GC NG-RAN network element;
  • the second network element is an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC.
  • the network element provides the E-UTRA user plane and control plane to the UE And connected to the 5GC NG-RAN network element, or terminal.
  • the above-mentioned "processor” is specifically used to, according to the Internet protocol version information supported by the second network element, the Internet protocol version information supported by the first network element, and the Internet protocol supported by the first network element
  • the version priority information determines the Internet protocol version of the transmission message of the first network element and the second network element, and generates a response message.
  • an embodiment of the present application provides an apparatus for determining an Internet protocol version.
  • the apparatus is applied to a second network element, and may specifically include:
  • the transceiver is used to send a request message to the first network element, the request message includes: Internet protocol version information supported by the second network element;
  • the transceiver is also used to receive a response message of the first network element, where the response message includes: an Internet protocol version of the transmission message of the first network element and the second network element.
  • This application re-modifies the X2 interface and Xw interface protocols, so that when the user plane forwarding bearer is established between the network elements on both sides, IPv4 addresses and IPv6 addresses can be supported. And receive the request message through the X2 interface, Xn interface or Xw interface, the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and the IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message. It should be noted that this application establishes a user plane forwarding bearer through control plane interaction.
  • the above “transceiver” may be specifically used to send a request message to the first network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the "first interface" may support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the above-mentioned "first network element” may be an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in EN-DC
  • the network element provides the UE with the E-UTRA user plane and control plane and is connected to the 5GC NG-RAN network element;
  • the second network element is an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC. And connected to the 5GC NG-RAN network element, or terminal.
  • an embodiment of the present application provides an apparatus for determining an Internet protocol version.
  • the apparatus is applied to a first network element, and may specifically include:
  • the transceiver module is used to receive a request message sent by the second network element, and the request message includes: Internet protocol version information supported by the second network element;
  • the processing module is used to determine the Internet protocol version of the transmission message of the first network element and the second network element according to the Internet protocol version information supported by the second network element and the Internet protocol version information supported by the first network element, and generate a response message ;
  • the transceiver module is also used to send a response message to the second network element.
  • This application re-modifies the X2 interface and Xw interface protocols, so that when the user plane forwarding bearer is established between the network elements on both sides, IPv4 addresses and IPv6 addresses can be supported. And receive the request message through the X2 interface, Xn interface or Xw interface, the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message. It should be noted that this application establishes a user plane forwarding bearer through control plane interaction.
  • the above transceiver module is specifically configured to: receive a request message sent by a second network element through a first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the "first interface" may support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the above-mentioned "first network element” may be an E-UTRAN base station, a base station in 5G, and the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in EN-DC Or, the network element provides the UE with the E-UTRA user plane and control plane and is connected to the 5GC NG-RAN network element;
  • the second network element is an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC.
  • the network element provides the E-UTRA user plane and control plane to the UE And connected to the 5GC NG-RAN network element, or terminal.
  • processing module is specifically used to, according to the Internet protocol version information supported by the second network element, the Internet protocol version information supported by the first network element, and the Internet protocol supported by the first network element
  • the version priority information determines the Internet protocol version of the transmission message of the first network element and the second network element, and generates a response message.
  • an embodiment of the present application provides an apparatus for determining an Internet protocol version.
  • the apparatus is applied to a second network element, and may specifically include:
  • the transceiver module is used to send a request message to the first network element, the request message includes: Internet protocol version information supported by the second network element;
  • the transceiver module is further used for receiving a response message of the first network element, where the response message includes: an Internet protocol version of the transmission message of the first network element and the second network element.
  • This application re-modifies the X2 interface and Xw interface protocols, so that when the user plane forwarding bearer is established between the network elements on both sides, IPv4 addresses and IPv6 addresses can be supported. And receive the request message through the X2 interface, Xn interface or Xw interface, the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and the IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message. It should be noted that this application establishes a user plane forwarding bearer through control plane interaction.
  • the above “transceiver module” may specifically be used to send a request message to the first network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the "first interface" may support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the above-mentioned "first network element” may be an E-UTRAN base station, a base station in 5G, and the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in EN-DC Or, the network element provides the UE with the E-UTRA user plane and control plane and is connected to the 5GC NG-RAN network element;
  • the second network element is an E-UTRAN base station, a base station in 5G, and a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC.
  • the network element provides the E-UTRA to the UE
  • the user plane and the control plane are connected to the 5GC NG-RAN network element, or terminal.
  • an embodiment of the present invention provides a computer program product containing instructions, which when run on a computer, causes the computer to execute the method according to any one of the first aspect or the second aspect.
  • Figure 1 is a schematic diagram of an application scenario of an interface
  • Figure 2 is a schematic diagram of an application scenario of another interface
  • Figure 3 is a schematic diagram of an application scenario of yet another interface
  • FIG. 4 is an interaction diagram when the interface shown in FIG. 1 establishes a transmission bearer
  • FIG. 5 is an interaction diagram when the interface shown in FIG. 2 establishes a transmission bearer
  • FIG. 6 is an interaction diagram when the interface shown in FIG. 3 establishes a transmission bearer
  • FIG. 8 is an interaction diagram of establishing a unidirectional transmission bearer from a first network element to a second network element according to an embodiment of the present application
  • FIG. 9 is a schematic diagram of determining an Internet protocol version based on FIG. 8 according to an embodiment of the present application.
  • FIG. 10 is another interaction diagram of establishing a unidirectional transmission bearer from a first network element to a second network element according to an embodiment of the present application
  • FIG. 11 is a schematic diagram of determining an Internet protocol version based on FIG. 10 according to an embodiment of the present application.
  • FIG. 12 is another interaction diagram of establishing a unidirectional transmission bearer from a first network element to a second network element according to an embodiment of the present application
  • FIG. 13 is a schematic diagram of determining an Internet protocol version based on FIG. 12 according to an embodiment of the present application.
  • 15 is a structural diagram of an apparatus for determining a second network element of an Internet protocol version provided by an embodiment of this application;
  • 16 is a structural diagram of an apparatus for determining a first network element of an Internet protocol version provided by an embodiment of this application;
  • 17 is a structural diagram of an apparatus for determining a second network element of an Internet protocol version provided by an embodiment of this application.
  • NG-RAN NG wireless access network (ie connected to 5GC);
  • EN-DC E-UTRA-NR dual connectivity
  • 4G fourth generation communication technology
  • 5G 5G dual link
  • Terminal user equipment, UE
  • Evolved Node B (E-UTRAN NodeB, eNodeB), generally refers to the name of the base station in LTE;
  • gNB or gNode B can refer to the base station in 5G;
  • en-gNB can refer to the network element providing the NR user plane and control plane to the UE, and acting as an auxiliary network element in the EN-DC (node providing NR user user plane and control plane protocol terminations to the UEs, and the activation of the Second, the node of the node) EN -DC);
  • ng-eNB can refer to the network element that provides UE with the evolved UMTS terrestrial radio access (Evolved-UMTS terrestrial radio access, E-UTRA) user plane and control plane, and is connected to the 5GC NG-RAN network element (node-providing E -UTRA user plane and control plane terminations towards the UE, and connected via via the NG interface to the 5GC);
  • E-UTRA evolved-UMTS terrestrial radio access
  • Internet protocol version 4 (internet protocol version 4, IPv4 address);
  • Internet protocol version 6 Internet protocol version 6, IPv6 address
  • WLAN Wireless local area network termination
  • the X2 interface is an interface between the eNB and the eNB or en-gNB.
  • the X2 interface is used for information exchange and data transmission such as UE mobility management among multiple eNBs, or for EN-DC service signaling and data transmission between eNB and en-gNB.
  • the Xn interface is an interface between gNB and gNB or ng-eNB.
  • the Xn interface is used for information exchange and data transmission such as UE mobility management among multiple gNBs, or for dual connectivity (DC) service signaling and data transmission between gNB and ng-eNB.
  • DC dual connectivity
  • the Xw interface is the interface between the eNB and the WT, and is used for the aggregation service between the long-term evolution (LTE) of the universal mobile communication technology (LTE) and wireless local area networks (WLAN) (ie LTE-WLAN Aggregation service).
  • LTE long-term evolution
  • WLAN wireless local area networks
  • Each network element on the radio access network (RAN) side may include at least one interface among the above three types, and each interface may plan IPv4 addresses, IPv6 addresses, or both IPv4 addresses and IPv6 when planning addresses At least one of the addresses.
  • each interface may plan IPv4 addresses, IPv6 addresses, or both IPv4 addresses and IPv6 when planning addresses At least one of the addresses.
  • it when it is used in the X2 interface or Xw interface for user plane transmission of multiple network elements, it must follow the 36.424 protocol or 36.464 protocol, and only supports IPv4 addresses with a 32-bit bit length or 128-bit IPv6 addresses It does not support the case of carrying both IPv4 addresses and IPv6 addresses at the 160-bit length.
  • IPv4 address Under 32-bit length, IPv6 address under 128-bit length, or supports both IPv4 address and IPv6 address under 160-bit length Case.
  • the source-side network element (S-Node) initiates a service request to the target-side network element (T-Node); the target-side network element allocates the transmission address between the two network elements and returns response signaling, where The response signaling includes a transmission address (IPv4 address or IPv6 address) between two network elements, so as to establish a forwarding bearer for unidirectionally sending data from the source side network element to the target side network element.
  • S-Node initiates a service request to the target-side network element
  • T-Node target-side network element
  • the response signaling includes a transmission address (IPv4 address or IPv6 address) between two network elements, so as to establish a forwarding bearer for unidirectionally sending data from the source side network element to the target side network element.
  • the source-side network element (S-Node) initiates a service request to the target-side network element (T-Node), the request carries the transmission address between the two network elements allocated by the source-side network element; the target side The network element returns confirmation signaling. Establish a forwarding bearer that unidirectionally sends data from the target side network element to the source side network element.
  • the source-side network element (S-Node) initiates a service request to the target-side network element (T-Node), and the request carries the transmission address between the two network elements initially allocated by the source-side network element; the target The side network element returns confirmation signaling, carrying the target layer network element to allocate the transport layer address between the two network elements.
  • T-Node when the S-Node only supports IPv6 addresses or IPv4 addresses, and the T-Node is configured with an IPv6 address and an IPv4 address dual-stack user plane address, if a unidirectional transport bearer from T-Node to S-Node is established, T -The IP address assigned by the Node may be different from the IP protocol version supported by the S-Node, which may also cause the business process to fail.
  • IPv4 addresses and IPv6 addresses are configured on the side of the allocated address; to ensure maximum compatibility, while establishing the forwarding bearer, although the IPv4 address and IPv6 address can be passed to the peer at the same time, this also means that the address is allocated One side should prepare to receive data at both IPv4 and IPv6 addresses, which would waste the transmission and forwarding resources of the network element on the side.
  • this application provides a method for determining the version of the Internet protocol to solve the above problems.
  • FIG. 7 is an interaction diagram for determining an Internet protocol version provided by an embodiment of the present application.
  • the method may include S710-S730, specifically:
  • S710 The second network element sends a request message to the first network element, where the request message includes: Internet protocol version information supported by the second network element.
  • the first network element may be an E-UTRAN base station, a base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC, or the network element provides the E -UTRA user plane and control plane connected to NG-RAN network element of 5GC;
  • the second network element is an E-UTRAN base station, a base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC.
  • WLAN terminal wireless local area network terminal
  • the second network element sends a request message to the first network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version supported by the first interface includes: IPv4, IPv6, or IPv4 and At least one of IPv6.
  • the second network element may further include: the second network element determines the request according to the Internet protocol version information supported by the second network element and the Internet protocol version priority information selected by the second network element News.
  • the above request message includes: Internet protocol version information supported by the second network element, which can represent two meanings, that is, when the first network element is a network element that allocates transmission addresses of network elements on both sides, the second network
  • the Internet protocol version information supported by the element may be Internet protocol version information configured by the second network element itself (ie, IPv4, IPv6, or at least one of IPv4 and IPv6).
  • the foregoing request message may further include Internet protocol address information (internet protocol address, IP address) of the second network element.
  • IP address may include the foregoing Internet protocol version information supported by the second network element.
  • the first network element receives the request message sent by the second network element, determines the Internet protocol version of the transmission message between the first network element and the second network element, and generates a response message.
  • the request message includes: Internet protocol version information supported by the second network element.
  • the first network element receives the request message sent by the second network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version supported by the first interface includes: IPv4 , IPv6, or at least one of IPv4 and IPv6.
  • the first network element may also be based on the Internet protocol version information supported by the second network element, the Internet protocol version information supported by the first network element, and the Internet protocol version priority information supported by the first network element , Determine the Internet protocol version of the transmission message of the first network element and the second network element, and generate a response message.
  • determining the Internet protocol version of the transmission message of the first network element and the second network element may be specifically determined in the embodiment of the present application as the method of determining the first network element and the second network element Internet protocol version for transmitting user plane messages.
  • S730 Send a response message to the second network element, the response message includes: an Internet protocol version of a transmission message of the first network element and the second network element, so as to facilitate the establishment of users of the first network element and the second network element Surface transmission bearer.
  • first network element and the second network element are only used to distinguish the two network elements, and are not used to distinguish the two network element categories, that is, the first network element may also have the functions in the second network element,
  • the second network element may also have the function of the first network element, that is, the first network element may be used as either the source side network element or the target side network element.
  • the second network element may be used as the source side network element, It can also be used as the target side network element.
  • the first network element may be used as a source-side network element
  • the second network element may be used as a target-side network element
  • the first network element can also be used as the target side network element
  • the second network element can also be used as the source side network element, which is not limited in this application.
  • the The first network element is used as the source side network element
  • the second network element is used as the target side network element as an embodiment for detailed description.
  • IPv4 addresses, IPv6 addresses, or IPv4 addresses and IPv6 can be carried when multiple network elements transmit addresses At least one of the addresses.
  • the second network element sends a request message to the first network element, the request message includes: an IP address of the second network element, where the IP address may be Includes the Internet protocol version of the transmitted message of the second network element.
  • the first network element receives the request message sent by the second network element, and sends a response message to the second network element.
  • the response message includes the IP address of the first network element, where the IP address may include selected Internet protocol version information.
  • the second network element receives the response message sent by the first network element and determines the Internet protocol version of the transmission message of the first network element and the second network element according to the Internet protocol version information selected by the first network element in the response message.
  • the IP address implicitly includes the version information of the Internet protocol supported by the second network element.
  • the Internet protocol version of the transmission message of the second network element is an IPv4 address and an IPv6 address
  • the first network element generates a response message according to the Internet protocol version information supported by the first network element is an IPv4 address or an IPv6 address, and sends To the second network element.
  • the IP address implicitly includes the Internet protocol version information supported by the second network element.
  • the Internet protocol version of the transmission message of the first network element and the second network element is an IPv4 address and an IPv6 address
  • the Internet protocol version information supported by the first network element is also an IPv4 address and an IPv6 address
  • the first network element needs to generate a response message based on the priority information of the Internet protocol version selected by the first network element (in fact, the priority information in the response message (whichever is higher in the IPv4 address or IPv6 address, whichever is selected), Still including an IPv4 address or an IPv6 address,), sent to the second network element, so that the second network element determines the Internet protocol version of the transmission message between the first network element and the second network element according to the response message.
  • S-Node source-side network element
  • T-Node target-side network element
  • S810 The S-Node initiates a service request to the T-Node by sending a request message, where the request message includes Internet protocol version information supported by the S-Node.
  • This step is specifically to initiate a service request to the T-Node through the X2 interface, Xn interface, or Xw interface, so the request message may specifically involve the IPv4 address, IPv6 address, or IPv4 address and IPv6 supported by the X2 interface, Xn interface, or Xw interface. At least one of the addresses.
  • At least one of the IPv4 address, IPv6 address, or IPv4 address and IPv6 address supported by the X2 interface, Xn interface, or Xw interface can also be understood as the user plane Internet protocol version supported by the X2 interface, Xn interface, or Xw interface Ability.
  • the T-Node receives the request message sent by the S-Node, and determines the Internet protocol version of the transmission message between the S-Node and the T-Node according to the request message and the Internet protocol version information supported by the T-Node.
  • the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is IPv4; or,
  • the request message includes IPv6.
  • the T-Node supports IPv4 and IPv6, the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is IPv6; or,
  • the request message includes IPv4 and IPv6.
  • the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is IPv6; or,
  • the request message includes IPv4 and IPv6.
  • IPv4 and IPv6 When the T-Node supports IPv4 and IPv6, at this time, another possible way is involved, that is, when the T-Node and S-Node are both IPv4 and IPv6 dual stack, You need to determine the Internet protocol version of the S-Node and T-Node transmission messages based on the Internet protocol version priority information.
  • the T-Node's Internet protocol version priority information is given priority, for example: when the T-Node When the priority of IPv4 is greater than IPv6, the Internet protocol version of S-Node and T-Node transmission messages is IPv4; or, when the priority of IPv4 in T-Node is less than IPv6, the priority of S-Node and T-Node The Internet protocol version for transmitting messages is IPv6.
  • the T-Node sends a response message to the S-Node.
  • the response message includes: the Internet protocol version of the transmission message between the S-Node and the T-Node, so as to facilitate the forwarding of the unidirectional transmission data from the S-Node to the T-Node Bearer.
  • a statistical table for determining the Internet protocol version can be summarized, as shown in Figure 9, which shows that the S-Node and T-Node are configured with different Internet protocol versions, and the final T-Node is transmission and forwarding A method for carrying an Internet protocol version of a transmission message of the first network element and the second network element.
  • the vertical header column shows the Internet protocol version information provided by the S-Node in the request message; the horizontal header row displays the Internet protocol version information and Internet protocol version priority information supported by the T-Node; the main body of the table is T-Node The finalized Internet protocol version of the S-Node and T-Node transmission messages.
  • FIG. 10 is another interaction diagram of establishing a unidirectional transmission bearer from a first network element to a second network element according to an embodiment of the present application.
  • FIG. 10 it is an application scenario for establishing a unidirectional transmission bearer from a target side network element (T-Node) to a source side network element (S-Node).
  • T-Node target side network element
  • S-Node source side network element
  • this scenario may be, for example, an EN-DC scenario or a packet data convergence protocol (PDCP) in a secondary node (SN) scenario.
  • PDCP packet data convergence protocol
  • SN secondary node
  • the master eNB master eNB, MeNB
  • sgNB release the source MeNB is allocated to forward the uplink or downlink (UL / DL) protocol data unit (protocol data unit, PDU) forwarding bearer (for example: GTP tunnel endpoint), which contains the transport layer address and user plane tunnel endpoint identifier (tunnel endpoint identifier (TEID).
  • UL / DL protocol data unit
  • PDU protocol data unit
  • the above method specifically includes S1010-S1030:
  • the S-Node initiates a service request to the T-Node by sending a request message, where the request message includes Internet protocol version information supported by the S-Node, and the Internet protocol version information supported by the S-Node is provided by the S-Node
  • the supported Internet protocol version is the Internet protocol version of the S-Node and T-Node transmission messages.
  • This step is specifically to initiate a service request to the T-Node through the X2 interface, Xn interface, or Xw interface, so the request message may specifically involve the IPv4 address, IPv6 address, or IPv4 address and IPv6 supported by the X2 interface, Xn interface, or Xw interface. At least one of the addresses.
  • At least one of the IPv4 address, IPv6 address, or IPv4 address and IPv6 address supported by the X2 interface, Xn interface, or Xw interface can also be understood as the user plane Internet protocol version supported by the X2 interface, Xn interface, or Xw interface Ability.
  • the T-Node receives the request message sent by the S-Node, and sends a response message to the S-Node according to the request message and the Internet protocol version information supported by the T-Node.
  • the request message includes an IPv4 address
  • the T-Node supports an IPv4 address.
  • the T-Node sends a response message to the S-Node.
  • the response message may carry the Internet protocol selected by the T-Node. IPv4 version information; in another possible implementation, does not carry the Internet protocol version information selected by the T-Node; or,
  • the request message includes an IPv6 address.
  • the T-Node supports an IPv6 address.
  • the T-Node sends a response message to the S-Node.
  • the response message may carry the Internet protocol version information selected by the T-Node. IPv6; in another possible implementation, does not carry the Internet protocol version information selected by the T-Node; or,
  • the request message includes the IPv4 address and the IPv6 address.
  • the T-Node supports the IPv4 address and the IPv6 address
  • the T-Node sends a response message to the S-Node.
  • the response message includes the Internet protocol version information selected by the T-Node. Specifically, the T-Node selects one of the IPv4 address and the IPv6 address according to the Internet protocol version priority information supported by the T-Node. Therefore, the response message includes the Internet protocol version with the higher priority of the two versions.
  • the S-Node receives the response message, and determines the Internet protocol version of the transmission message between the S-Node and the T-Node according to the response message.
  • the Internet protocol version of the transmission message between the S-Node and the T-Node is the IPv4 address or the IPv6 address.
  • the T-Node determines the higher priority version among the supported versions according to the Internet protocol version priority information supported by the T-Node Internet protocol version of S-Node and T-Node transmission messages. For example: if the Internet protocol version supported by T-Node has a higher priority as an IPv4 address, then the Internet protocol version of the messages transmitted by S-Node and T-Node is the IPv4 address; similarly, it can be seen that T-Node supports The higher priority of the Internet protocol version is the IPv6 address. Then, the Internet protocol version of the transmission message of the S-Node and the T-Node is the IPv6 address.
  • a statistical table that determines the version of the Internet protocol can be summarized.
  • the vertical header column shows the transmission messages of S-Node and T-Node provided by the S-Node in the request message Internet protocol version;
  • the header line of the horizontal table shows the Internet protocol version information supported by the T-Node and the Internet protocol version priority information supported by the T-Node;
  • the content in the center of the table is the supported Internet protocol finally returned by the target side network element Version Information. If the source-side network element carries only one Internet protocol version information, the target-side network element may not explicitly return the supported Internet protocol version information.
  • the request message when the request message includes an IPv4 address and the T-Node supports an IPv6 address; or, when the request message includes an IPv6 address and the T-Node supports an IPv4 address, That is to say, when there is no intersection between the supported Internet protocol versions of the T-Node and S-Node, the forwarding inheritance of the S-Node and T-Node user planes cannot be established, that is, the failed flag appears in the figure.
  • FIG. 12 is an interaction diagram of establishing a bidirectional transmission bearer between a first network element and a second network element according to an embodiment of the present application.
  • S-Node source-side network element
  • T-Node target-side network element
  • the S-Node initiates a service request to the T-Node by sending a request message, where the request message includes Internet protocol version information supported by the S-Node, where the Internet protocol version information may be hidden in the IP address.
  • This step is specifically to initiate a service request to the T-Node through the X2 interface, Xn interface, or Xw interface, so the request message may specifically involve the IPv4 address, IPv6 address, or IPv4 address and IPv6 supported by the X2 interface, Xn interface, or Xw interface. At least one of the addresses.
  • At least one of the IPv4 address, IPv6 address, or IPv4 address and IPv6 address supported by the X2 interface, Xn interface, or Xw interface can also be understood as the user plane Internet protocol version supported by the X2 interface, Xn interface, or Xw interface Ability.
  • the T-Node receives the request message, and determines the Internet protocol version of the transmission message between the S-Node and the T-Node according to the request message and the Internet protocol version information supported by the T-Node.
  • the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is the IPv4 address; or,
  • the request message includes an IPv6 address.
  • the T-Node When the T-Node supports both an IPv4 address and an IPv6 address, the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is an IPv6 address; or,
  • the request message includes an IPv4 address and an IPv6 address.
  • the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is an IPv4 address; or,
  • the request message includes an IPv4 address and an IPv6 address.
  • the T-Node determines that the Internet protocol version of the transmission message between the S-Node and the T-Node is an IPv6 address; or,
  • the T-Node sends a response message to the S-Node, where the response message includes: the Internet protocol version (ie, IPv4 address or IPv6 address) of the transmission message of the S-Node and the T-Node, so as to simultaneously establish an uplink or Forwarding bearer for sending data in both downlink directions.
  • the Internet protocol version ie, IPv4 address or IPv6 address
  • a statistical table for determining the Internet protocol version can be summarized.
  • the vertical header column shows the Internet protocol version information supported by the S-Node in the request message provided by the S-Node
  • the horizontal header shows the Internet protocol version information supported by the T-Node and the Internet protocol version priority information supported by the T-Node; the central content in the table is the assigned S-Node and T that the target side network element finally returns -Internet protocol version of Node's transmission message.
  • the network elements on both sides fully interact with the Internet protocol version information, which requires modification of the corresponding protocol .
  • the user plane is established first (the Internet protocol version of the transmitted message is clear at the time of establishment), there is no need to modify the corresponding protocol.
  • the method may include the following steps: namely, when the Internet protocol version of the control plane messages transmitted by the network elements on both sides is clear, the network elements on both sides only need to select the same Internet protocol version for both sides according to the control plane Internet protocol version supported by themselves User plane messages can be transmitted between network elements.
  • the Internet protocol version of the control plane messages transmitted by the network elements on both sides is determined to be an IPv4 address
  • the network elements on both sides only need to select an IPv4 address in the Internet protocol version of the user plane that they support to establish the user plane forwarding bearer of the network elements on both sides.
  • IPv6 addresses so I won't repeat them here.
  • the user plane forwarding bearer between the network elements on both sides can support IPv4 addresses and IPv6 addresses.
  • the request message includes the version of the Internet protocol supported by the network element that sends the request message, and realizes the cooperation between the two network elements in the IP dual stack and the IP single stack to establish users
  • a method for forwarding bearers in a plane in particular, when establishing a unidirectional forwarding bearer, the selection result of the Internet protocol version supported by the interactive network element and the Internet protocol version of the transmitted message.
  • the Internet of the plane link is controlled according to the corresponding interface instance.
  • the protocol version selects the user plane address of the same Internet protocol version.
  • FIG. 14 is a structural diagram of an apparatus for determining a first network element of an Internet protocol version provided by an embodiment of this application. As shown in FIG. 14, the device 1400 is applied to the first network element, and may specifically include:
  • the transceiver 1401 is configured to receive a request message sent by the second network element, where the request message includes: Internet protocol version information supported by the second network element;
  • the processor 1402 is configured to determine the Internet protocol version of the transmission message of the first network element and the second network element according to the Internet protocol version information supported by the second network element and the Internet protocol version information supported by the first network element, and generate a response News
  • the transceiver 1401 is also used to send a response message to the second network element.
  • the Internet protocol version that the first interface can support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the first network element may be an E-UTRAN base station, a base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC or the network element provides the E-UTRA user plane and control to the UE
  • the plane is connected to the NG-RAN network element of 5GC; the second network element is the E-UTRAN base station, the base station in 5G, and the base station in 5G.
  • the network element provides the NR user plane and control plane to the UE and serves as the EN-DC Auxiliary network element.
  • the network element provides the E-UTRA user plane and control plane to the UE and is connected to the 5GC NG-RAN network element, or terminal.
  • the device 1500 is applied to the second network element, and may specifically include:
  • the transceiver 1501 is configured to send a request message to the first network element, where the request message includes: Internet protocol version information supported by the second network element;
  • the transceiver 1501 is further configured to receive a response message of the first network element.
  • the response message includes: an Internet protocol version of the transmission message of the first network element and the second network element.
  • the transceiver 1501 may be specifically configured to send a request message to the first network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the first interface can support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the first network element may be an E-UTRAN base station, a base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC, or the network element provides the E-UTRA user plane to the UE And the control plane and connected to the NG-RAN network element of 5GC;
  • the second network element is the E-UTRAN base station, the base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as the auxiliary network element in EN-DC ,
  • the network element provides the E-UTRA user plane and control plane to the UE and connects to the 5GC NG-RAN network element, or terminal.
  • FIG. 16 is a structural diagram of an apparatus for determining a first network element of an Internet protocol version provided by an embodiment of this application. As shown in FIG. 16, the device 1600 is applied to the first network element, and may specifically include:
  • the processing module 1602 is configured to determine the Internet protocol version of the transmission message of the first network element and the second network element according to the Internet protocol version information supported by the second network element and the Internet protocol version information supported by the first network element, and generate a response News
  • the transceiver module 1601 is also used to send a response message to the second network element.
  • the transceiver module is specifically configured to: receive the request message sent by the second network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the first interface can support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the first network element may be an E-UTRAN base station, a base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC, or the network element provides the E-UTRA user plane to the UE And the control plane and connected to the NG-RAN network element of 5GC;
  • the second network element is the E-UTRAN base station, the base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as the auxiliary network element in EN-DC ,
  • the network element provides the E-UTRA user plane and control plane to the UE and connects to the 5GC NG-RAN network element, or terminal.
  • the processing module is specifically configured to determine the first network element and the second network element based on the Internet protocol version information supported by the second network element, the Internet protocol version information supported by the first network element, and the Internet protocol version priority information selected by the first network element
  • the network element transmits the message and the Internet protocol version, and generates a response message.
  • FIG. 17 is a structural diagram of an apparatus for determining a second network element of an Internet protocol version provided by an embodiment of this application. As shown in FIG. 17, the device 1700 is applied to the second network element, and may specifically include:
  • the transceiver module 1701 is configured to send a request message to the first network element, where the request message includes: Internet protocol version information supported by the second network element;
  • the transceiver module 1701 is further configured to receive a response message of the first network element, where the response message includes: an Internet protocol version of the transmission message of the first network element and the second network element.
  • the transceiver module 1701 may be specifically configured to send a request message to the first network element through the first interface, where the first interface supports at least one Internet protocol version.
  • the Internet protocol version that the first interface can support includes: an IPv4 address, an IPv6 address, or at least one of an IPv4 address and an IPv6 address.
  • the first network element may be an E-UTRAN base station, a base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as an auxiliary network element in the EN-DC, or the network element provides the E-UTRA user plane to the UE And the control plane and connected to the NG-RAN network element of 5GC;
  • the second network element is the E-UTRAN base station, the base station in 5G, the network element provides the NR user plane and control plane to the UE and serves as the auxiliary network element in EN-DC ,
  • the network element provides the E-UTRA user plane and control plane to the UE and connects to the 5GC NG-RAN network element, or terminal.

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Abstract

一种确定互联网协议版本的方法，所述方法包括：第一网元接收第二网元发送的请求消息，请求消息包括：第二网元支持的互联网协议版本信息；第一网元根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息；向第二网元发送响应消息。该方法通过在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况，并且通过发送请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。

Description

一种确定互联网协议版本的方法及装置 技术领域
本申请涉及通信技术领域，具体涉及一种确定互联网协议版本的方法及装置。
背景技术
目前在第三代合作伙伴计划(3rd generation partnership project，3GPP)36.423协议(例如：X2接口应用协议(X2 application protocol，X2AP))及36.463协议(例如：Xw接口应用协议(Xw application protocol，XwAP))中，当前定义被通过X2接口或者Xw接口用于网元之间进行用户面传输时，因为要遵循上述的36.424协议(例如：X2接口数据传输(X2 data transport)及36.464协议(例如：Xw接口数据传输(Xw data transport))，所以上述两个接口均不支持同时携带互联网协议(internet protocol，IP)的第四版(即IPv4)地址和互联网协议的第六版(即IPv6)地址的情况，所以在同时配置了IPv4地址和IPv6地址的双栈网元和仅配置了IPv4地址或者IPv6地址的单栈对端网元对接时，无法预知对端的互联网协议版本，就会出现两端选择的互联网协议版本的不同，导致业务流程失败。
虽然，3GPP 38.424协议(例如：Xn接口数据传输(data transport))定义Xn接口支持携带IPv4地址和IPv6地址的情况，但是，目前在建立单向的转发承载时，接收用户面数据的网元需要同时准备IPv4地址和IPv6地址的相关资源来接收信息，在这种情况下会浪费接收信息的网元的传输转发资源。
发明内容
本申请提供一种确定互联网协议版本的方法及装置，通过接口接收请求消息，该请求消息包括发送端支持的互联网协议版本信息，解决了在同时配置了IPv4地址和IPv6地址的双栈网元和仅配置了IPv4地址或IPv6地址的单栈对端网元对接时，两端网元(即接收方网元和发送方网元)选择的互联网协议版本不同，导致业务流程失败的问题。以及接收信息的网元需要同时准备IPv4地址和IPv6地址来接收信息，在这种情况下会浪费接收信息的网元的传输转发资源的问题。
第一方面，本申请实施例提供了一种确定互联网协议版本的方法，具体可以包括:第一网元接收第二网元发送的请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
第一网元根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息；
向第二网元发送响应消息。
本申请通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议 版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。需要说明的是，本申请是通过控制面交互，建立用户面转发承载。
在一个可选的实现方式中，上述“第一网元接收第二网元发送的请求消息”的步骤中，具体包括：
第一网元通过第一接口接收第二网元发送的请求消息，其中，第一接口支持至少一种互联网协议版本。
在另一个可选的实现方式中，上述“第一接口”可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
在又一个可选的实现方式中，上述“第一网元”可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。其中，该终端具体可以为无线局域网终端(WLAN终端)。
在再一个可选的实现方式中，上述“第一网元根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息”的步骤中，具体可以包括：
第一网元根据第二网元支持的互联网协议版本信息、第一网元支持的互联网协议版本信息和第一网元支持的互联网协议版本优先权信息，确定第一网元与第二网元的传输消息和互联网协议版本，并生成响应消息。
第二方面，本申请实施例提供了一种确定互联网协议版本的方法，具体可以包括:第二网元向第一网元发送请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
第二网元接收第一网元的响应消息，响应消息包括：第一网元与第二网元的传输消息的互联网协议版本。
本申请通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。需要说明的是，本申请是通过控制面交互，建立用户面转发承载。
在一个可选的实现方式中，上述“第二网元向第一网元发送请求消息”的步骤中，具体可以包括：
第二网元通过第一接口向第一网元发送请求消息，其中，第一接口支持至少一种 互联网协议版本。
在另一个可选的实现方式中，上述“第一接口”可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
在又一个可选的实现方式中，上述“第一网元”可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
第三方面，本申请实施例提供了一种确定互联网协议版本的装置，装置应用于第一网元，具体可以包括：
收发器，用于接收第二网元发送的请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
处理器，用于根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息；
收发器还用于，向第二网元发送响应消息。
本申请通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。需要说明的是，本申请是通过控制面交互，建立用户面转发承载。
在一个可选的实现方式中，上述收发器具体用于：通过第一接口接收第二网元发送的请求消息，其中，第一接口支持至少一种互联网协议版本。
在另一个可选的实现方式中，上述“第一接口”可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
在又一个可选的实现方式中，上述“第一网元”可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
在再一个可选的实现方式中，上述“处理器”具体用于，根据第二网元支持的互联网协议版本信息、第一网元支持的互联网协议版本信息和第一网元支持的互联网协议版本优先权信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息。
第四方面，本申请实施例提供了一种确定互联网协议版本的装置，装置应用于第二网元，具体可以包括：
收发器，用于向第一网元发送请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
收发器还用于，接收第一网元的响应消息，响应消息包括：第一网元与第二网元的传输消息的互联网协议版本。
本申请通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。需要说明的是，本申请是通过控制面交互，建立用户面转发承载。
在一个可选的实现方式中，上述“收发器”具体可以用于，通过第一接口向第一网元发送请求消息，其中，第一接口支持至少一种互联网协议版本。
在另一个可选的实现方式中，上述“第一接口”可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
在又一个可选的实现方式中，上述“第一网元”可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
第五方面，本申请实施例提供了一种确定互联网协议版本的装置，装置应用于第一网元，具体可以包括：
收发模块，用于接收第二网元发送的请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
处理模块，用于根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息；
收发模块还用于，向第二网元发送响应消息。
本申请通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。需要说明的是，本申请是通过控制面交互，建立用户面转发承载。
在一个可选的实现方式中，上述收发模块具体用于：通过第一接口接收第二网元发送的请求消息，其中，第一接口支持至少一种互联网协议版本。
在另一个可选的实现方式中，上述“第一接口”可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
在又一个可选的实现方式中，上述“第一网元”可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
在再一个可选的实现方式中，上述“处理模块”具体用于，根据第二网元支持的互联网协议版本信息、第一网元支持的互联网协议版本信息和第一网元支持的互联网协议版本优先权信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息。
第六方面，本申请实施例提供了一种确定互联网协议版本的装置，装置应用于第二网元，具体可以包括：
收发模块，用于向第一网元发送请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
收发模块还用于，接收第一网元的响应消息，响应消息包括：第一网元与第二网元的传输消息的互联网协议版本。
本申请通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。需要说明的是，本申请是通过控制面交互，建立用户面转发承载。
在一个可选的实现方式中，上述“收发模块”具体可以用于，通过第一接口向第一网元发送请求消息，其中，第一接口支持至少一种互联网协议版本。
在另一个可选的实现方式中，上述“第一接口”可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
在又一个可选的实现方式中，上述“第一网元”可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
第七方面，本发明实施例提供了一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如第一方面或者第二方面中任意一项的方法。
第八方面，本发明实施例提供了一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如第一方面或者第二方面中任意一项的方法。
附图说明
图1为一种接口的应用场景示意图；
图2为另一种接口的应用场景示意图；
图3为再一种接口的应用场景示意图；
图4为图1所示的接口建立传输承载时的交互图；
图5为图2所示的接口建立传输承载时的交互图；
图6为图3所示的接口建立传输承载时的交互图；
图7为本申请实施例提供的一种确定互联网协议版本的交互图；
图8为本申请实施例提供的一种建立第一网元到第二网元单向传输承载的交互图；
图9为本申请实施例提供的一种基于图8的确定互联网协议版本的示意图；
图10为本申请实施例提供的另一种建立第一网元到第二网元单向传输承载的交互图；
图11为本申请实施例提供的一种基于图10的确定互联网协议版本的示意图；
图12为本申请实施例提供的又一种建立第一网元到第二网元单向传输承载的交互图；
图13为本申请实施例提供的一种基于图12的确定互联网协议版本的示意图；
图14为本申请实施例提供的一种确定互联网协议版本的第一网元的装置结构图；
图15为本申请实施例提供的一种确定互联网协议版本的第二网元的装置结构图；
图16为本申请实施例提供的一种确定互联网协议版本的第一网元的装置结构图；
图17为本申请实施例提供的一种确定互联网协议版本的第二网元的装置结构图。
具体实施方式
为便于对本申请实施例的理解，下面将结合附图以具体实施例做进一步的解释说明，实施例并不构成对本申请实施例的限定。
首先，为了方便理解，将本申请用到的缩略语和关键术语进行定义：
NR，为NR无线接入；
NG-RAN：NG无线接入网络(即连接到5GC)；
5GC：第五代移动电话行动通信标准5G核心网络；
EN-DC(E-UTRA-NR dual connectivity)，一般指为第四代通讯技术(4G)和5G双链接；
终端(user equipment，UE)；
演进型Node B(E-UTRAN NodeB，eNodeB)，一般指LTE中基站的名称；
gNB或者gNode B，可以指代5G中的基站；
en-gNB，可以指网元向UE提供NR用户平面和控制平面，并充当EN-DC中的辅助网元(node providing NR user plane and control plane protocol terminations towards the UE,and acting as Secondary Node in EN-DC)；
ng-eNB，可以指网元向UE提供进化的UMTS陆地无线接入(Evolved-UMTS terrestrial radio access，E-UTRA)用户平面和控制平面，并连接到5GC的NG-RAN网元(node providing E-UTRA user plane and control plane protocol terminations towards the UE,and connected via the NG interface to the 5GC)；
互联网协议版本4(internet protocol version 4，IPv4地址)；
互联网协议版本6(internet protocol version 6，IPv6地址)；
无线局域网终端(WLAN termination，WT)。
目前，如图1所示，X2接口为eNB与eNB或者en-gNB之间的接口。X2接口用于多个eNB之间UE移动性管理等信息交互及数据传输，或者用于eNB与en-gNB间EN-DC业务信令及数据传输。
如图2所示，Xn接口为gNB与gNB或者ng-eNB之间的接口。Xn接口用于多个gNB之间UE移动性管理等信息交互及数据传输，或者用于gNB与ng-eNB间双链接(dual connectivity，DC)业务信令及数据传输。
如图3所示，Xw接口为eNB与WT间的接口，用于通用移动通信技术的长期演进(long term evolution，LTE)和无线局域网(wireless local area networks，WLAN)之间的聚合业务(即LTE-WLAN Aggregation业务)。
无线接入网(radio access network，RAN)侧的每个网元可以包括上述3种类型中的至少一个接口，每个接口在规划地址时可以规划IPv4地址、IPv6地址或者同时规划IPv4地址和IPv6地址中的至少一种。但是，目前当被用于X2接口或者Xw接口进行多个网元的用户面传输时，要遵循36.424协议或36.464协议，仅支持32bit比特长度下的IPv4地址或者128比特长度下的IPv6地址，并不支持160比特长度下同时携带IPv4地址及IPv6地址的情况。当被用于Xn接口进行多个网元的用户面传输时，遵循38.424协议，支持32bit比特长度下的IPv4地址、128比特长度下的IPv6地址或者支持160比特长度下同时携带IPv4地址和IPv6地址的情况。
通过上述3种接口建立传输承载时，具体的交互方式如下所示，下面结合图4-图6进行详细说明：
如图4所示，源侧网元(S-Node)向目标侧网元(T-Node)发起业务请求；由目标侧网元分配两侧网元间的传输地址，返回响应信令，其中该响应信令包括两个网元间的传输地址(IPv4地址或者IPv6地址)，以便于建立由源侧网元向目标侧网元单向发送数据的转发承载。
如图5所示，源侧网元(S-Node)向目标侧网元(T-Node)发起业务请求,该请求携带由源侧网元分配的两侧网元间的传输地址；目标侧网元返回确认信令。建立由目标侧网元向源侧网元单向发送数据的转发承载。
如图6所示，源侧网元(S-Node)向目标侧网元(T-Node)发起业务请求,该请求携带由源侧网元初次分配的两侧网元间的传输地址；目标侧网元返回确认信令，携带目标侧网元分配两侧网元间的传输层地址。
在上述3种场景中(即图4-图6)所示的内容中，因为S-Node或者T-Node无法预知对端的所支持的用户面互联网协议版本且X2或者Xw接口不支持同时携带IPv4地址和IPv6地址的情况。所以，当S-Node配置了IPv6地址和IPv4地址双栈用户面地 址，而T-Node仅支持IPv6地址或者IPv4地址时，如果由S-Node先分配X2或Xw地址，则分配的两侧网元间的传输地址可能和T-Node支持的互联网协议版本不同，导致业务流程失败。反之，当S-Node仅支持IPv6地址或者IPv4地址时，而T-Node配置了IPv6地址和IPv4地址双栈用户面地址时，如果是建立T-Node到S-Node的单向传输承载，T-Node分配的IP地址可能和S-Node支持的IP协议版本不同，也会导致业务流程失败。
即使Xn接口支持同时携带IPv6地址和IPv4地址的情况，但是对于上述图4和图5所示的场景中，因为仅建立单向的转发承载，S-Node和T-Node间仅交互一侧的传输层地址。如果分配地址的一侧配置了IPv4地址和IPv6地址；为保证最大限度的兼容性，在建立转发承载时，虽然可以同时将IPv4地址和IPv6地址传递给对端，但是这也意味着分配地址的一侧要同时准备以IPv4地址及IPv6地址接收数据，这样会浪费该侧网元的传输转发资源。
针对上述出现的问题，本申请提供了一种确定互联网协议版本的方法解决上述出现的问题。
如图7所示，图7为本申请实施例提供的一种确定互联网协议版本的交互图。
该方法可以包括S710-S730，具体地：
S710：第二网元向第一网元发送请求消息，其中，该请求消息包括：第二网元支持的互联网协议版本信息。
具体地，上述第一网元可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端，其中，该终端可以具体指无线局域网终端(WLAN终端)。
第二网元通过第一接口向第一网元发送请求消息，其中，第一接口支持至少一种互联网协议版本，具体地，第一接口支持的互联网协议版本包括：IPv4、IPv6、或者IPv4和IPv6中的至少一种。
此外，在一种可能的实施例中，在S710之前，还可以包括：第二网元根据第二网元支持的互联网协议版本信息和第二网元选择的互联网协议版本优先权信息，确定请求消息。
需要说明是，上述的请求消息包括：第二网元支持的互联网协议版本信息，可以代表两种含义，即当第一网元为分配两侧网元传输地址的网元时，该第二网元支持的互联网协议版本信息可以是第二网元自身配置的互联网协议版本信息(即IPv4、IPv6、或IPv4和IPv6中的至少一种)。
在另一种可能的实施例中，上述的请求消息还可以包括第二网元的互联网协议地址信息(internet protocol address，IP地址)，在一种可能的情况下，该IP地址中可以包含上述的第二网元支持的互联网协议版本信息。在请求消息包括IP地址的情况下，默认当前相关协议已经支持对应的接口进行第一网元与第二网元的传输。
S720：第一网元接收第二网元发送的请求消息，确定所述第一网元与所述第二网元的传输消息的互联网协议版本，并生成响应消息。其中，请求消息包括：所述第二网元支持的互联网协议版本信息。
具体地，第一网元通过第一接口接收所述第二网元发送的请求消息，其中，第一接口支持至少一种互联网协议版本，具体地，第一接口支持的互联网协议版本包括：IPv4、IPv6、或者IPv4和IPv6中的至少一种。
在一种可能的实施例中，第一网元还可以根据第二网元支持的互联网协议版本信息、第一网元支持的互联网协议版本信息和第一网元支持的互联网协议版本优先权信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息。
需要说明的是，确定所述第一网元与所述第二网元的传输消息的互联网协议版本在本申请实施例中可以具体为确定所述第一网元与所述第二网元的传输用户面报文的互联网协议版本。
S730：向所述第二网元发送响应消息，响应消息包括：第一网元与所述第二网元的传输消息的互联网协议版本，以便于建立第一网元和第二网元的用户面传输承载。
需要说明的是，第一网元和第二网元只是作为区分两个网元，并不作为区分两个网元的类别，即第一网元也可以具备上述第二网元中的功能，第二网元也可以具备第一网元的功能，即第一网元既可以作为源侧网元，也可以作为目标侧网元，同理，第二网元既可以作为源侧网元，也可以作为目标侧网元。
为了更好地理解本申请提供的方法，下面结合图8-图13以及具体的例子进行详细说明。
需要说明的是，上述第一网元可以作为源侧网元，第二网元可以作为目标侧网元。同理，第一网元也可以作为目标侧网元，第二网元也可以作为源侧网元，在本申请中并不做出限定，但是，为了方便的理解，在本申请中，将以第一网元作为源侧网元，第二网元作为目标侧网元为一个实施例进行详细说明。
此外，在本申请中提供的实施例中，不管是X2、Xn或者Xw接口中的哪一种，在多个网元进行传输地址时都是可以携带IPv4地址、IPv6地址、或IPv4地址和IPv6地址中的至少一种的。
除图7所示的方式，还有一种可能的实施例，第二网元向第一网元发送请求消息，所述请求消息包括：所述第二网元的IP地址，其中IP地址中可以包括第二网元的传输消息的互联网协议版本。
第一网元接收第二网元发送的请求消息，并向第二网元发送响应消息，响应消息包括所述第一网元的IP地址，其中IP地址中可以包括选择的互联网协议版本信息。
第二网元接收第一网元发送的响应消息并根据响应消息中的第一网元选择的互联网协议版本信息，确定第一网元与所述第二网元的传输消息的互联网协议版本。
举个例子，当第二网元向第一网元发送请求消息包括第二网元IP地址，IP地址中隐含包括第二网元支持的互联网协议版本信息，此时，第一网元与所述第二网元的传输消息的互联网协议版本如IPv4地址和IPv6地址时，此时，第一网元根据第一网元支持的互联网协议版本信息是IPv4地址或者IPv6地址生成响应消息，发送至第二网元即可。
当第二网元向第一网元发送请求消息包括IP地址，IP地址中隐含包括第二网元支持的互联网协议版本信息。此时，第一网元与所述第二网元的传输消息的互联网协议版本如IPv4地址和IPv6地址时，此时，第一网元支持的互联网协议版本信息也是IPv4地址和IPv6地址时，第一网元需要根据第一网元选择的互联网协议版本优先权信息生成响应消息(其实，该响应消息中因为优先权信息的原因(IPv4地址和IPv6地址谁的优先权高就选择哪个)，还是包括IPv4地址或者IPv6地址，)，发送至第二网元，以便于第二网元根据该响应消息确定第一网元与所述第二网元的传输消息的互联网协议版本。
图8为本申请实施例提供的一种建立第一网元到第二网元单向传输承载的交互图。
如图8所示，为建立源侧网元(S-Node)到目标侧网元(T-Node)单项传输承载的应用场景，具体包括S810-S830：
S810：S-Node通过发送请求消息向T-Node发起业务请求，其中，该请求消息包括S-Node所支持的互联网协议版本信息。
该步骤具体为通过X2接口、Xn接口或者Xw接口向T-Node发起业务请求，所以，该请求消息具体可以涉及X2接口、Xn接口或者Xw接口支持的IPv4地址、IPv6地址、或IPv4地址和IPv6地址中的至少一种。
其中，上述X2接口、Xn接口或者Xw接口支持的IPv4地址、IPv6地址、或IPv4地址和IPv6地址中的至少一种也可以理解为X2接口、Xn接口或者Xw接口所支持的用户面互联网协议版本的能力。
S820：T-Node接收S-Node发送的请求消息，并根据该请求消息和T-Node支持的互联网协议版本信息，确定S-Node与T-Node的传输消息的互联网协议版本。
例如：请求消息包括IPv4，T-Node支持的是IPv4和IPv6时，T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv4；或者，
请求消息包括IPv6，T-Node支持的是IPv4和IPv6时T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv6；或者，
请求消息包括IPv4和IPv6，T-Node支持的是IPv4时，T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv4；或者，
请求消息包括IPv4和IPv6，T-Node支持的是IPv6时，T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv6；或者，
请求消息包括IPv4和IPv6，T-Node支持的是IPv4和IPv6时，此时，涉及到了另一种可能的方式，即当T-Node和S-Node均为IPv4和IPv6双栈的情况时，需要根据互联网协议版本优先权信息确定S-Node与T-Node的传输消息的互联网协议版本，在该场景下，优先考虑T-Node的互联网协议版本优先权信息确定，例如：当T-Node中的IPv4的优先权大于IPv6时，S-Node与T-Node的传输消息的互联网协议版本为IPv4；或者，当T-Node中的IPv4的优先权小于IPv6时，S-Node与T-Node的传输消息的互联网协议版本为IPv6。
S830：T-Node向S-Node发送响应消息，该响应消息中包括：S-Node与T-Node的传输消息的互联网协议版本，以便于由S-Node向T-Node单向发送数据的转发承载。
综上，在该种场景下，可以总结出确定互联网协议版本的统计表格，如图9所示，该显示S-Node和T-Node在不同互联网协议版本配置下，最终T-Node为传输转发承载分配第一网元与所述第二网元的传输消息的互联网协议版本的方式。竖表头列显示S-Node在请求消息中提供的支持互联网协议版本信息；横表头行显示T-Node支持的互联网协议版本信息及互联网协议版本优先权信息；表格主体部分内容为T-Node最终确定的S-Node与T-Node的传输消息的互联网协议版本。
在另一种可能的实施例中，也可能会出现例如：请求消息包括IPv4，T-Node支持的是IPv6地址时；或者，请求消息包括IPv6，T-Node支持的是IPv4地址时，也就是说T-Node和S-Node在支持的互联网协议版本无交集时，无法建立S-Node与T-Node用户面的转发传承。
图10为本申请实施例提供的另一种建立第一网元到第二网元单向传输承载的交互图。
如图10所示，为建立目标侧网元(T-Node)到源侧网元(S-Node)单向传输承载的应用场景。
在实际应用中，该场景可以例如：EN-DC场景或者分组数据汇聚协议(packet data convergence protocol，PDCP)在辅助节点(secondary Node，SN)场景。其中，在前述第二种场景中，具体地，由主eNB(master eNB，MeNB)发起辅助gNB释放(sgNB release)时，源侧MeNB分配了用于转发上行链路或者下行链路(UL/DL)协议数据单元(protocol data unit，PDU)的转发承载(例如：GTP tunnel endpoint)，其中包含传输层地址及用户面的隧道端点标识(tunnel endpoint identifier，TEID)。
上述方法具体包括S1010-S1030：
S1010：S-Node通过发送请求消息向T-Node发起业务请求，其中，该请求消息包括S-Node所支持的互联网协议版本信息，该S-Node所支持的互联网协议版本信息为S-Node所支持的互联网协议版本且为S-Node与T-Node的传输消息的互联网协议版本。
该步骤具体为通过X2接口、Xn接口或者Xw接口向T-Node发起业务请求，所以，该请求消息具体可以涉及X2接口、Xn接口或者Xw接口支持的IPv4地址、IPv6地址、或IPv4地址和IPv6地址中的至少一种。
其中，上述X2接口、Xn接口或者Xw接口支持的IPv4地址、IPv6地址、或IPv4地址和IPv6地址中的至少一种也可以理解为X2接口、Xn接口或者Xw接口所支持的用户面互联网协议版本的能力。
S1020：T-Node接收S-Node发送的请求消息，并根据该请求消息和T-Node支持的互联网协议版本信息，向S-Node发送响应消息。
例如：请求消息包括IPv4地址，T-Node支持的是IPv4地址，T-Node向S-Node发送响应消息，该响应消息中在一种可能的实施方式中，可以携带T-Node选择的互联网协议版本信息IPv4；在另一种可能的实施方式中，不携带T-Node选择的互联网协议版本信息；或者，
请求消息包括IPv6地址，T-Node支持的是IPv6地址，T-Node向S-Node发送响应消息，该响应消息中在一种可能的实施方式中，可以携带T-Node选择的互联网协议 版本信息IPv6；在另一种可能的实施方式中，不携带T-Node选择的互联网协议版本信息；或者，
请求消息包括IPv4地址和IPv6地址，T-Node支持的是IPv4地址和IPv6地址时，T-Node向S-Node发送响应消息，该响应消息包括T-Node选择的互联网协议版本信息。具体地，T-Node根据T-Node支持的互联网协议版本优先权信息选择IPv4地址和IPv6地址中的一个，所以，该响应消息包括的是两者版本优先权高的互联网协议版本。
需要说明的是，在该上述步骤中，(相对S810～S830)这里实际可以指代的是携带IP地址，在该场景下，相应明确的IP版本(即IPv4或IPv6)即可，不需要携带地址。
S1030：S-Node接收响应消息，并根据响应消息确定S-Node与T-Node的传输消息的互联网协议版本。
例如：当响应消息中包括T-Node支持的互联网协议版本信息仅为IPv4地址或IPv6地址时，那么，S-Node与T-Node的传输消息的互联网协议版本就为IPv4地址或IPv6地址。
但是当请求消息中包括S-Node支持的互联网协议版本信息为IPv4地址和IPv6地址时，T-Node根据自身支持的互联网协议版本优先权信息，确定所支持的版本中优先权较高的版本为S-Node与T-Node的传输消息的互联网协议版本。例如：若T-Node支持的互联网协议版本优先权较高的是IPv4地址，那么，S-Node与T-Node的传输消息的互联网协议版本就为IPv4地址；同理可知，T-Node支持的互联网协议版本优先权较高的是IPv6地址，那么，S-Node与T-Node的传输消息的互联网协议版本就为IPv6地址。
综上，在该种场景下，可以总结出确定互联网协议版本的统计表格，如图11所示，竖表头列显示S-Node在请求消息中提供的S-Node与T-Node的传输消息的互联网协议版本；横表头行显示T-Node支持的互联网协议版本信息和T-Node支持的互联网协议版本优先权信息；表格中心部分的内容，为目标侧网元最终返回的支持的互联网协议版本信息。若因为源侧网元仅携带了一个互联网协议版本信息，则目标侧网元可以不显式返回的支持的互联网协议版本信息。
在另一种可能的实施例中，也可能会出现例如：请求消息包括IPv4地址，T-Node支持的是IPv6地址时；或者，请求消息包括IPv6地址，T-Node支持的是IPv4地址时，也就是说T-Node和S-Node在支持的互联网协议版本无交集时，无法建立S-Node与T-Node用户面的转发传承，即图中出现得失败(failed)的标识。
图12为本申请实施例提供的建立第一网元和第二网元间双向传输承载的交互图。
如图12所示，为建立源侧网元(S-Node)到目标侧网元(T-Node)两个方向传输承载的场景，具体包括S1210-S1230：
S1210：S-Node通过发送请求消息向T-Node发起业务请求，其中，该请求消息包括S-Node所支持的互联网协议版本信息，其中，该互联网协议版本信息可以隐藏在IP地址中。
该步骤具体为通过X2接口、Xn接口或者Xw接口向T-Node发起业务请求，所以，该请求消息具体可以涉及X2接口、Xn接口或者Xw接口支持的IPv4地址、IPv6地址、 或IPv4地址和IPv6地址中的至少一种。
其中，上述X2接口、Xn接口或者Xw接口支持的IPv4地址、IPv6地址、或IPv4地址和IPv6地址中的至少一种也可以理解为X2接口、Xn接口或者Xw接口所支持的用户面互联网协议版本的能力。
S1220：T-Node接收请求消息，并根据该请求消息和T-Node支持的互联网协议版本信息，确定S-Node与T-Node的传输消息的互联网协议版本。
例如：请求消息包括IPv4地址，T-Node支持的是IPv4地址和IPv6地址时，T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv4地址；或者，
请求消息包括IPv6地址，T-Node支持的是IPv4地址和IPv6地址时T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv6地址；或者，
请求消息包括IPv4地址和IPv6地址，T-Node支持的是IPv4地址时，T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv4地址；或者，
请求消息包括IPv4地址和IPv6地址，T-Node支持的是IPv6地址时，T-Node确定S-Node与T-Node的传输消息的互联网协议版本为IPv6地址；或者，
请求消息包括IPv4地址和IPv6地址，T-Node支持的是IPv4地址和IPv6地址时，此时，涉及到了另一种可能的方式，即当T-Node和S-Node均为IPv4地址和IPv6地址双栈的情况时，需要根据互联网协议版本优先权信息确定S-Node与T-Node的传输消息的互联网协议版本，在该场景下，优先考虑T-Node的互联网协议版本优先权信息确定，例如：当T-Node中的IPv4地址的优先权大于IPv6地址时，S-Node与T-Node的传输消息的互联网协议版本为IPv4地址；或者，当T-Node中的IPv4地址的优先权小于IPv6地址时，S-Node与T-Node的传输消息的互联网协议版本为IPv6地址。
需要说明的是，在该上述步骤中，(相对S810～S830)这里实际可以指代的是携带IP地址，在该场景下，相应明确的IP版本(即IPv4或IPv6)即可，不需要携带地址
S1230：T-Node向S-Node发送响应消息，该响应消息中包括：S-Node与T-Node的传输消息的互联网协议版本(即IPv4地址或者IPv6地址)，以便于同时建立上行链路或者下行链路两个方向发送数据的转发承载。
综上，在该中场景下，可以总结出确定互联网协议版本的统计表格，如图13所示，竖表头列显示S-Node在请求消息中提供的S-Node所支持的互联网协议版本信息；横表头行显示T-Node所支持的互联网协议版本信息及T-Node支持的互联网协议版本优先权信息；表中中心内容，为目标侧网元最终返回的其分配的S-Node与T-Node的传输消息的互联网协议版本。
在上述3中场景中，通过在请求消息中添加新的信息(例如：某个网元所支持的互联网协议版本信息)，两侧网元充分交互互联网协议版本信息，该方式需要修改对应的协议。而下述的方法中，因用户面先建立(在建立时，传输消息的互联网协议版本明确)，所以是不需要修改对应的协议。
该方法可以包括下述步骤：即当两侧网元传输控制面消息的互联网协议版本明确时，两侧网元仅需根据自身支持的控制面互联网协议版本选择相同的互联网协议版本用于两侧网元间传输用户面报文即可。例如：当两侧网元传输控制面消息的互联网协 议版本确定为IPv4地址时，两侧网元仅需在自身支持的用户面互联网协议版本选择IPv4地址建立两侧网元的用户面转发承载，IPv6地址同理，在此不再赘述。
本申请中，通过对X2接口和Xw接口协议的重新修改，使在两侧网元间建立用户面转发承载时，可以支持IPv4地址和IPv6地址的情况。并且通过X2接口、Xn接口或者Xw接口接收请求消息，该请求消息包括发送这个请求消息的网元所支持的互联网协议版本，实现了两侧网元在IP双栈和IP单栈配合，建立用户面转发承载的方法，其中，特别是在建立单向转发承载时，交互网元所支持的互联网协议版本及传输消息的互联网协议版本的选择结果。此外，通过X2接口、Xw接口或者Xn接口建立用户面转发承载时，两侧的网元如果在用户面配置了IPv6地址和IPv4地址的双栈地址，则根据对应接口实例控制面链路的互联网协议版本选取相同互联网协议版本的用户面地址。
图14为本申请实施例提供的一种确定互联网协议版本的第一网元的装置结构图。如图14所示，该装置1400应用于第一网元，具体可以包括：
收发器1401，用于接收第二网元发送的请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
处理器1402，用于根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息；
收发器1401还用于，向第二网元发送响应消息。
具体地，收发器具体用于：通过第一接口接收第二网元发送的请求消息，其中，第一接口支持至少一种互联网协议版本。
其中，第一接口可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。第一网元可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元或者网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；第二网元为E-UTRAN基站，5G中的基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
处理器具体用于，根据第二网元支持的互联网协议版本信息、第一网元支持的互联网协议版本信息和第一网元支持的互联网协议版本优先权信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息。
图15为本申请实施例提供的一种确定互联网协议版本的第二网元的装置结构图。如图15所示，该装置1500应用于第二网元，具体可以包括：
收发器1501，用于向第一网元发送请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
收发器1501还用于，接收第一网元的响应消息，响应消息包括：第一网元与第二网元的传输消息的互联网协议版本。
具体地，收发器1501具体可以用于，通过第一接口向第一网元发送请求消息，其中，第一接口支持至少一种互联网协议版本。
其中，第一接口可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。第一网元可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
图16为本申请实施例提供的一种确定互联网协议版本的第一网元的装置结构图。如图16所示，该装置1600应用于第一网元，具体可以包括：
收发模块1601，用于接收第二网元发送的请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
处理模块1602，用于根据第二网元支持的互联网协议版本信息和第一网元支持的互联网协议版本信息，确定第一网元与第二网元的传输消息的互联网协议版本，并生成响应消息；
收发模块1601还用于，向第二网元发送响应消息。
具体地，收发模块具体用于：通过第一接口接收第二网元发送的请求消息，其中，第一接口支持至少一种互联网协议版本。
其中，第一接口可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。第一网元可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
处理模块具体用于，根据第二网元支持的互联网协议版本信息、第一网元支持的互联网协议版本信息和第一网元选择的互联网协议版本优先权信息，确定第一网元与第二网元的传输消息和互联网协议版本，并生成响应消息。
图17为本申请实施例提供的一种确定互联网协议版本的第二网元的装置结构图。如图17所示，该装置1700应用于第二网元，具体可以包括：
收发模块1701，用于向第一网元发送请求消息，请求消息包括：第二网元支持的互联网协议版本信息；
收发模块1701还用于，接收第一网元的响应消息，响应消息包括：第一网元与第二网元的传输消息的互联网协议版本。
具体地，收发模块1701具体可以用于，通过第一接口向第一网元发送请求消息，其中，第一接口支持至少一种互联网协议版本。
其中，第一接口可以支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。第一网元可以为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；第二网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。

Claims (13)

  1. 一种确定互联网协议版本的方法，其特征在于，包括：
    第一网元接收第二网元发送的请求消息，所述请求消息包括：所述第二网元支持的互联网协议版本信息；
    所述第一网元根据所述第二网元支持的互联网协议版本信息和所述第一网元支持的互联网协议版本信息，确定所述第一网元与所述第二网元的传输消息的互联网协议版本，并生成响应消息；
    向所述第二网元发送响应消息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一网元接收第二网元发送的请求消息，包括：
    所述第一网元通过第一接口接收所述第二网元发送的请求消息，其中，所述第一接口支持至少一种互联网协议版本。
  3. 根据权利要求2所述的方法，其特征在于，所述第一接口支持的互联网协议版本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
  4. 根据权利要求2或3所述的方法，其特征在于，所述第一网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；所述第二网元为所述E-UTRAN基站，5G中的基站，所述网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
  5. 根据权利要求1所述的方法，其特征在于，所述第一网元根据所述第二网元支持的互联网协议版本信息和所述第一网元支持的互联网协议版本信息，确定所述第一网元与所述第二网元的传输消息的互联网协议版本，并生成响应消息，包括：
    所述第一网元根据所述第二网元支持的互联网协议版本信息、所述第一网元支持的互联网协议版本信息和所述第一网元支持的互联网协议版本优先权信息，确定所述第一网元与所述第二网元的传输消息的互联网协议版本，并生成响应消息。
  6. 一种确定互联网协议版本的方法，包括：
    第二网元向第一网元发送请求消息，所述请求消息包括：所述第二网元支持的互联网协议版本信息；
    所述第二网元接收所述第一网元的响应消息，所述响应消息包括：所述第一网元与所述第二网元的传输消息的互联网协议版本。
  7. 根据权利要求6所述的方法，其特征在于，所述第二网元向第一网元发送请求消息，包括：
    所述第二网元通过第一接口向所述第一网元发送请求消息，其中，所述第一接口支持至少一种互联网协议版本。
  8. 根据权利要求7所述的方法，其特征在于，所述第一接口支持的互联网协议版 本包括：IPv4地址、IPv6地址、或者IPv4地址和IPv6地址中的至少一种。
  9. 根据权利要求7或8所述的方法，其特征在于，所述第一网元为E-UTRAN基站，5G中的基站，网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，或者，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元；
    所述第二网元为所述E-UTRAN基站，所述5G中的基站，所述网元向UE提供NR用户平面和控制平面并充当EN-DC中的辅助网元，网元向UE提供E-UTRA用户平面和控制平面并连接到5GC的NG-RAN网元，或者终端。
  10. 一种确定互联网协议版本的装置，其特征在于，所述装置应用于第一网元，具体包括：
    收发器，用于接收第二网元发送的请求消息，所述请求消息包括：所述第二网元支持的互联网协议版本信息；
    处理器，用于根据所述第二网元支持的互联网协议版本信息和所述第一网元支持的互联网协议版本信息，确定所述第一网元与所述第二网元的传输消息的互联网协议版本，并生成响应消息；
    所述收发器还用于，向所述第二网元发送响应消息。
  11. 一种确定互联网协议版本的装置，其特征在于，所述装置应用于第二网元，具体包括：
    收发器，用于向第一网元发送请求消息，所述请求消息包括：所述第二网元支持的互联网协议版本信息；
    所述收发器还用于，接收所述第一网元的响应消息，所述响应消息包括：所述第一网元与所述第二网元的传输消息的互联网协议版本。
  12. 一种计算机可读存储介质，包括指令，当其在计算机上运行时，使得计算机执行如权利要求1-5或者6-9中任意一项所述的方法。
  13. 一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行如权利要求1-5或者6-9中任意一项所述的方法。
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