WO2018201999A1 - 用户面链路建立方法、基站及移动性管理设备 - Google Patents

用户面链路建立方法、基站及移动性管理设备 Download PDF

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Publication number
WO2018201999A1
WO2018201999A1 PCT/CN2018/085043 CN2018085043W WO2018201999A1 WO 2018201999 A1 WO2018201999 A1 WO 2018201999A1 CN 2018085043 W CN2018085043 W CN 2018085043W WO 2018201999 A1 WO2018201999 A1 WO 2018201999A1
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Prior art keywords
base station
peer address
user equipment
address
response message
Prior art date
Application number
PCT/CN2018/085043
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English (en)
French (fr)
Inventor
郭伟
许岚
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2019560131A priority Critical patent/JP7035082B2/ja
Priority to EP18795218.9A priority patent/EP3611946B1/en
Priority to KR1020197035010A priority patent/KR102390546B1/ko
Publication of WO2018201999A1 publication Critical patent/WO2018201999A1/zh
Priority to US16/672,642 priority patent/US11419027B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • 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
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes

Definitions

  • the present application relates to the field of communications, and in particular, to a method for establishing a user plane link, a base station, and a mobility management device.
  • NB-IoT Narrow Band Internet of Things
  • 3GPP 3rd Generation Partnership Project
  • GSM Global System for Mobile Communication
  • UMTS Universal Mobile Telecommunications System
  • Long Long Term Evolution
  • LTE Long Term Evolution
  • the target base station ie, the non-suspended station
  • the source base station ie, suspends the site
  • the user context information is returned to the target base station, and the target base station can restore the state of the user equipment according to the user context information.
  • the prior art target base station does not know how to restore the user plane link corresponding to the user equipment, so that the user equipment cannot perform normal service data transmission.
  • An embodiment of the present application provides a user plane link establishing method, where the method includes:
  • the first base station When the first base station needs to recover the user equipment in the suspended state, the first base station sends an acquisition request to the second base station, and then the first base station receives the response message returned by the second base station, where the response message includes the peer address.
  • the first base station establishes a user plane link corresponding to the user equipment according to the peer address.
  • the peer address refers to the address of the core network element connected to the base station in the user plane corresponding to the user equipment. Specifically, in the LTE network, the peer address is a peer address of the S1-U interface.
  • the first base station can obtain the peer address in the process of restoring the state of the suspended user equipment, and establish a user plane link corresponding to the user equipment according to the peer address, so that the user equipment can The normal transmission of business data.
  • the response message may include an extended cell, where the extended cell is used to indicate the peer address.
  • the embodiment of the present application provides a specific manner for indicating a peer address, which improves the achievability of the solution.
  • the extended cell is uplink GTP tunnel node information.
  • the uplink GTP tunnel node is defined in the abstract syntax tagging protocol as the SGW node to which the S1 interface is connected, which is used for the transmission of the uplink packet data unit.
  • the embodiment of the present application can indicate the peer address by using the uplink GTP tunnel node information, and does not need to additionally define the extended cell, which reduces the complexity of the implementation.
  • the first or second implementation manner of the first aspect in the third implementation manner of the first aspect of the embodiment, the peer address may include an IP address of the SGW.
  • the embodiment of the present application provides a specific implementation manner for establishing a user plane link, which improves the achievability of the solution.
  • the obtaining request is used to obtain context information of the user equipment, where the response message includes The context information of the user equipment, then the extended cell is a cell in the context information.
  • a second aspect of the embodiments of the present application provides a method for establishing a user plane link, where the method includes:
  • the first base station When the first base station needs to recover the user equipment in the suspended state, the first base station sends a request for acquiring a user context to the second base station, and after the second base station returns the context information of the user equipment to the first base station, the first base station may Transmitting, by the mobility management device, a link switch request corresponding to the user equipment, after updating the user plane link information of the user equipment according to the link switch request, returning an acknowledgement message to the first base station, the acknowledge message
  • the peer base address is included, and the first base station receives the acknowledgement message, and establishes a user plane link corresponding to the user equipment according to the peer end address.
  • the peer address refers to the address of the core network element connected to the base station in the user plane corresponding to the user equipment.
  • the peer address is a peer address of the S1-U interface.
  • the mobility management device sends a peer address to the first base station in the process of restoring the state of the user equipment by the first base station, so that the first base station can establish the user equipment corresponding to the peer end address.
  • the user plane link enables the user equipment to perform normal service data transmission.
  • the peer address may include an Internet Protocol address of the serving gateway.
  • the embodiment of the present application provides a specific implementation manner for establishing a user plane link, which improves the achievability of the solution.
  • a third aspect of the embodiments of the present application provides a method for establishing a user plane link, where the method includes:
  • the first base station When the first base station needs to recover the user equipment in the suspended state, the first base station sends an acquisition request to the second base station, the second base station receives the acquisition request, determines the peer address according to the acquisition request, and then sends the base station address to the first base station. Sending a response message including the peer address, so that the second base station can establish a user plane link according to the peer address.
  • the peer address refers to the address of the core network element connected to the base station in the user plane corresponding to the user equipment. Specifically, in the LTE network, the peer address is a peer address of the S1-U interface.
  • the second base station sends the peer address to the first base station in the process of recovering the state of the user equipment by the first base station, so that the first base station can establish the corresponding user equipment according to the peer address.
  • the user plane link enables the user equipment to perform normal transmission of service data.
  • the second base station performs the following steps before sending the response message:
  • the second base station carries the extended cell for indicating the peer address in the response message.
  • the embodiment of the present application provides a specific implementation manner for indicating a peer address, which improves the achievability of the solution.
  • the extended cell is uplink GTP tunnel node information.
  • the uplink GTP tunnel node is defined in the abstract syntax tagging protocol as the SGW node to which the S1 interface is connected, which is used for the transmission of the uplink packet data unit.
  • the embodiment of the present application can indicate the peer address by using the uplink GTP tunnel node information, and does not need to additionally define the extended cell, which reduces the complexity of the implementation.
  • the obtaining request is used to obtain context information of the user equipment, where the response message includes the The context information of the user equipment, then the extended cell is a cell in the context information.
  • the peer end address may include an internet protocol address of the service gateway.
  • a fourth aspect of the embodiments of the present application provides a base station, where the base station includes:
  • a sending module configured to send an acquisition request to the second base station
  • a receiving module configured to receive a response message corresponding to the obtaining request, where the response message includes a peer address
  • the processing module is configured to establish a user plane link corresponding to the user equipment according to the peer address received by the receiving module.
  • the response message includes an extended cell, where the extended cell is used to indicate the peer address.
  • the extended cell may include: uplink GTP tunnel node information.
  • the peer end address may include an internet protocol address of the serving gateway.
  • the response message includes context information of the user equipment, where the extended cell is a context The cell in the message.
  • a fifth aspect of the embodiments of the present application provides a base station, where the base station includes:
  • a sending module configured to send, to the mobility management device MME, a link switching request corresponding to the user equipment
  • a receiving module configured to receive an acknowledgement message corresponding to the link switch request, where the acknowledgement message includes a peer address
  • a module is configured to establish a user plane link corresponding to the user equipment according to the peer address received by the receiving module.
  • the peer address may include an IP address of the SGW.
  • a sixth aspect of the embodiments of the present application provides a base station, where the base station includes:
  • a receiving module configured to receive an acquisition request sent by the first base station
  • a determining module configured to determine a peer address according to the obtaining request received by the receiving module
  • a sending module configured to send a response message to the first base station, where the response message includes the peer address.
  • the base station further includes:
  • the bearer module is configured to carry the extended cell in the response message, where the extended cell is used to indicate the peer address.
  • the extended cell is uplink GTP tunnel node information.
  • the peer end address includes an internet protocol address of the serving gateway.
  • the response message includes context information of the user equipment, where the extended information element is The cell of the context information.
  • a seventh aspect of the embodiments of the present application provides a base station, where the base station includes: a transceiver, a memory, and a processor;
  • the memory is used to store the program
  • the processor is configured to execute a program in the memory, and specifically includes the following steps:
  • the control transceiver receives the response message corresponding to the acquisition request, where the response message includes a peer address;
  • the response message includes: an extended cell, where the extended cell is used to indicate the peer address.
  • the extended cell may include uplink GTP tunnel node information.
  • the peer address includes an internet protocol address of the serving gateway.
  • the response message includes context information of the user equipment, where the extended cell is the context The cell in the message.
  • An eighth aspect of the embodiments of the present application provides a base station, where the base station includes: a transceiver, a memory, and a processor;
  • the memory is used to store the program
  • the processor is configured to execute a program in the memory, and specifically includes the following steps:
  • the peer address includes an internet protocol address of the serving gateway.
  • a ninth aspect of the embodiments of the present application provides a base station, where the base station includes: a transceiver, a memory, and a processor;
  • the memory is used to store the program
  • the processor is configured to execute a program in the memory, and specifically includes the following steps:
  • the control transceiver sends a response message to the first base station, and the response message includes a peer address.
  • the processor is further configured to perform the following steps:
  • the extended cell is carried in the response message, and the extended cell is used to indicate the peer address.
  • the extended cell is uplink GTP tunnel node information.
  • the peer end address includes an internet protocol address of the service gateway. .
  • the response message includes context information of the user equipment, where the extended cell is the context The cell in the message.
  • a tenth aspect of the embodiments of the present application provides a computer readable storage medium having instructions stored in a computer, when executed by a computer, causing a computer to perform the methods described in the first to third aspects above .
  • An eleventh embodiment of the present application provides a computer program product comprising instructions which, when executed by a computer, cause the computer to perform the methods described in the first to third aspects above.
  • the embodiments of the present application have the following advantages:
  • the first base station can obtain the peer address in the process of restoring the state of the suspended user equipment, and establish a user plane link corresponding to the user equipment according to the peer address, so that the user equipment can The normal transmission of business data.
  • FIG. 1 is a schematic diagram of an embodiment of a user plane link establishing system in an embodiment of the present application
  • FIG. 2 is a flowchart of an embodiment of a method for establishing a user plane link in an embodiment of the present application
  • FIG. 3 is a flowchart of another embodiment of a method for establishing a user plane link in an embodiment of the present application
  • FIG. 4 is a flowchart of another embodiment of a method for establishing a user plane link in an embodiment of the present application
  • FIG. 5 is a flowchart of another embodiment of a method for establishing a user plane link in an embodiment of the present application
  • FIG. 6 is a schematic diagram of an embodiment of a base station in an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another embodiment of a base station in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of another embodiment of a base station in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another embodiment of a base station in an embodiment of the present application.
  • the embodiment of the present application provides a method for establishing a user plane link, which is used to establish a valid user plane link in a cross-site recovery scenario, so that the user equipment normally transmits service data.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G fifth-generation
  • the user equipment in the embodiment of the present application includes but is not limited to a mobile station (MS), a mobile terminal, a mobile telephone, a handset, and a portable device.
  • the user equipment can communicate with one or more core networks via a Radio Access Network (RAN).
  • RAN Radio Access Network
  • the user equipment can be a mobile phone (or “wolf” phone) and has wireless communication capabilities.
  • the user device can also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device.
  • the base station in the embodiment of the present application may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved Node B (eNB or eNB in LTE). e-NodeB), the embodiment of the present application is not limited.
  • BTS Base Transceiver Station
  • NodeB base station
  • eNB evolved Node B
  • e-NodeB evolved Node B
  • the base station may send a release message to the user equipment, where the release message includes a resume identifier and a release reason, so that the user equipment enters a suspend mode, and at the same time, the base station may The information about the radio access bearer and the related security configuration used by the user equipment in the RRC connection mode is retained.
  • the base station When the user equipment needs to perform data transmission, that is, when the RRC connection needs to be performed, the base station only needs to send the recovery to the base station.
  • the identified recovery request the base station can identify the user equipment by using the recovery identifier, and resume the state of the user equipment, that is, can skip the related configuration information exchange and directly enter the data transmission.
  • a suspend mode is added.
  • the user equipment receives the release message including the recovery identifier and the release reason, the user equipment enters the suspend mode, that is, the user equipment is considered to be in a suspended state.
  • the base station side retains the radio access bearer of the user equipment in the suspended state, and the related security configuration. If the user equipment needs to switch from the suspend mode to the RRC online mode for data transmission, the state recovery needs to be initiated. The process is to send the recovery identifier to the base station, and let the base station recover the information of the corresponding radio access bearer and security configuration.
  • the system is composed of an access network and a core network, where the access network is called an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN), and the core network is called It is an evolved packet core network (Evolved Packet Core, EPC).
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • EPC evolved packet core network
  • the E-UTRAN is mainly composed of network elements such as user equipment and base stations; the EPC is mainly composed of a Mobility Management Entity (MME), a Serving Gateway (SGW), and a Public Data Network Gateway (Public Data Network Gateway). PGW) and Policy and Charging Rules Function (PCRF).
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • PGW Public Data Network Gateway
  • PCRF Policy and Charging Rules Function
  • the MME is mainly responsible for signaling processing. Specific functions include access control, mobility management, session management, and selection of SGW and PGW.
  • the main function of the SGW is to perform routing and forwarding of data packets under the control of the MME, and forward the received user data to the designated PGW.
  • PCW Internet Protocol
  • the PCRF is primarily used to provide available measurement and billing control decisions.
  • IP protocol services are services based on IP protocols, such as IP Multimedia Subsystem (IMS).
  • IMS IP Multimedia Subsystem
  • the protocol stack is divided into a user plane and a control plane.
  • the transmission service and application data are called the user plane, and the user plane carries the application data of the user.
  • the link composition of the user plane is shown in Figure 1.
  • the signaling information is called the control plane, and the control plane carries the interactive control information of the user and the network. For example, when a user accesses the Internet, establishing, maintaining, and releasing a link with the network is performed through a control plane.
  • the link composition of the control plane is shown in Figure 1.
  • the Uu interface is a communication interface between the user equipment and the base station, and the Uu interface can be divided into two interfaces, one for control plane transmission, such as RRC signaling messages, and the other for user plane transmission, such as broadcasting. Messages, etc.
  • the S1 interface is a communication interface between the base station and the core network, and can be divided into two interfaces, one is called an S1-MME interface, and is an interface between the base station and the mobility management device, and is used for control plane transmission, for example, evolving Evolved Radio Access Bearer (E-RAB) management information, etc.; another called S1-U interface, which is an interface between the base station and the serving gateway, used for user plane transmission, such as hypertext transfer protocol data. Wait.
  • E-RAB Evolved Radio Access Bearer
  • the S11 interface is a communication interface between the mobility management device and the service gateway, and is used for controlling plane transmission, for example, creating a session, deleting a session, and the like.
  • the S5 interface is a communication interface between the service gateway and the public data network gateway.
  • the S5 interface can be divided into two interfaces, one for control plane transmission and the other for user plane transmission.
  • the communication interface between the service gateway and the public data network gateway can also be divided into two interfaces, one for control plane transmission and the other for user plane transmission.
  • the Gx interface is a communication interface between the public data network gateway and the measurement and PCRF for controlling the transmission of the plane.
  • the Rx interface is a communication interface between the PCRF and the external Internet for controlling the transmission of the plane.
  • SGi is the communication interface between the public data network gateway and the external Internet, and is used for user plane transmission.
  • the mobility management device in FIG. 1 is only a name, and the name itself does not limit the device.
  • the “mobility management device” may also be replaced by “mobility management node”, “mobility management entity” or Other names; moreover, the mobility management device may correspond to a device including other functions except the mobility management function, which is uniformly described herein, and will not be described below.
  • an embodiment of the user plane link transmission method in this embodiment of the present application includes:
  • the first base station sends an acquisition request to the second base station.
  • the second base station releases the release message to cause the user equipment to enter the suspend mode, that is, the user equipment is in a suspended state.
  • the release message carries the recovery identifier corresponding to the user equipment.
  • the state recovery process is initiated. Specifically, the user equipment carries the corresponding recovery identifier in the recovery request and transmits the data to the first base station. After receiving the request, the first base station sends an acquisition request to the second base station, where the acquisition request includes the recovery identifier.
  • the recovery identifier is generally 40 bits of data, wherein the first 20 bits of data are used to identify the suspended site, and the last 20 bits of data are customized by the suspended site.
  • the suspended site in the embodiment of the present application Refers to the second base station. 202.
  • the first base station receives a response message.
  • the second base station After receiving the acquisition request, the second base station determines the user equipment corresponding to the recovery identifier, determines the peer address corresponding to the user equipment, and then sends a response message to the first base station, where the response message includes the peer address.
  • the first base station receives the response message and obtains the peer address.
  • the peer address refers to the network element address of one end of the core network in the user plane corresponding to the user equipment.
  • the peer address is a peer address of the S1-U interface.
  • the peer address may be the peer address of the other interface, which is not limited herein.
  • the first base station establishes a user plane link corresponding to the user equipment according to the peer address.
  • the first base station After obtaining the peer address, the first base station establishes a communication connection between the first base station and the network element corresponding to the peer end address, that is, establishes a user plane link corresponding to the user equipment.
  • the first base station can obtain the peer address in the process of restoring the state of the suspended user equipment, and establish a user plane link corresponding to the user equipment according to the peer address, so that the user equipment can The normal transmission of business data.
  • the user plane link establishment method in the embodiment of the present application is described from the perspective of the first base station.
  • the user plane link establishment method in the embodiment of the present application is described from the perspective of the second base station.
  • Another embodiment of the method for establishing a user plane link in the application embodiment includes:
  • the second base station receives an acquisition request sent by the first base station.
  • the first base station determines that the suspended site corresponding to the user equipment is the second base station, and needs to restore the state of the user equipment
  • the first base station sends an acquisition request to the second base station
  • the second base station receives the acquisition request, and carries the The recovery identifier corresponding to the user equipment.
  • the recovery identifier is generally 40 bits of data, wherein the first 20 bits of data are used to identify the suspended site, and the last 20 bits of data are customized by the suspended site.
  • the suspended site in the embodiment of the present application Refers to the second base station.
  • the second base station determines, according to the obtaining request, a peer address.
  • the second base station After receiving the acquisition request, the second base station identifies the carrying recovery identifier in the obtaining request, determines the user equipment corresponding to the recovery identifier, and then determines a user plane link for transmitting the user equipment data, and one end of the core network.
  • the network element address that is, the peer address.
  • the peer address is a peer address of the S1-U interface. In other communication networks, the peer address may be the peer address of the other interface, which is not limited herein.
  • the second base station sends a response message to the first base station.
  • the peer end address is carried in the response message, and then the response message is sent to the first base station, and after receiving the response message, the first base station may establish the first base station.
  • the second base station sends the peer address to the first base station in the process of recovering the state of the user equipment by the first base station, so that the first base station can establish the corresponding user equipment according to the peer address.
  • the user plane link enables the user equipment to perform normal transmission of service data.
  • the user plane link establishment method in the embodiment of the present application is described below with reference to an interaction embodiment.
  • FIG. 4 another embodiment of the user plane link establishment method in this embodiment of the present application is provided.
  • the first base station sends an acquisition request to the second base station.
  • the user equipment meets the suspend condition, and the second base station releases the release message, so that the user equipment enters the suspend mode, that is, the user equipment is in a suspended state, and the second base station allocates a recovery identifier to the user equipment that needs to enter the suspend state. And carry the recovery identifier in the release message.
  • the state recovery process is initiated. Specifically, the user equipment carries the corresponding recovery identifier in the RRC connection request and transmits the data to the first base station. After receiving the request, the first base station sends an acquisition request to the second base station, where the acquisition request is used to obtain context information of the user equipment, and the acquisition request includes the recovery identifier.
  • the request for the acquisition may be a specific user context request (retrieve UE context request), or may be other requests, which is not limited herein.
  • the first base station and the second base station may communicate through the X2 interface, and may also perform communication in other manners, which is not limited herein.
  • the second base station determines, according to the obtaining request, a peer address.
  • the second base station After receiving the acquisition request of the first base station, the second base station determines the context information of the user equipment according to the recovery identifier in the acquisition request, and at the same time, the second base station further determines the network at the core network end of the user plane corresponding to the user equipment.
  • the address of the meta the peer address.
  • the second base station sends a response message to the first base station.
  • the second base station After determining the context information and the peer address, the second base station carries the context information and the peer address in the response message, and then sends a response message including the context information and the peer address to the first base station.
  • the response message obtains a user context response (retrieve UE context response), and may be other messages, which is not limited herein.
  • the second base station may add one or more extended cells to the response message, and then carry the peer address in the extended cell.
  • the extended cell may be the General Packet Radio Service Tunneling Protocol (GTP) tunnel node information, or other information, such as a newly defined cell dedicated to indicating the peer address. For example, other cells in the system that also have the peer address indication function are not listed here.
  • GTP General Packet Radio Service Tunneling Protocol
  • the extended cell may be a cell in the context information, or may be other cells independent of the context information, which is not limited herein. That is, in the embodiment of the present application, the peer address may be sent to the first base station in the context information, or the peer address may be opened independently from the context information, and the context information and the peer address are sent to the first Base station.
  • an uplink GTP tunnel node is defined as an SGW node to which an S1 interface is connected, for uplink packet data units (PDUs). Transfer between. That is, the uplink GTP tunnel node may be used to indicate the peer address, and the peer address may specifically be the IP address of the SGW. It should be noted that the address of the peer end may be an IP address of the SGW, and may be an address of the network element used for performing user plane data transmission with the base station in the core network, which is not limited herein.
  • the context information may include the E-RAB, the identifier of the E-RAB, the QoS parameter or the bearer type of each E-RAB level, and may include other information, specifically There is no limit.
  • the information and the uplink GTP tunnel node information may be carried in the response message as the content in the E-RAB establishment list.
  • the response message may also include other information for responding to the acquisition request, which is not limited herein.
  • the first base station establishes a user plane link corresponding to the user equipment according to the peer address.
  • the first base station After receiving the response message sent by the second base station, the first base station recovers the state of the user equipment, so that the user equipment recovers to the state before the suspension, specifically, the first base station may recover the information according to the context information in the response message.
  • the user plane link between the network element corresponding to the peer end address of the first base station is also established.
  • the first base station may determine the target SGW in the core network according to the peer address indicated by the uplink GTP tunnel node information, and then establish a user plane link between the first base station and the target SGW through the S1-U interface.
  • the first base station may also send a path switch request to the mobility management device in the core network, so that the core network side can successfully update the user plane chain. Road switching information.
  • the user equipment can transmit service data through the user plane link. For example, when the user uses the mobile phone to access the Internet, the mobile phone sends the Internet access request to the first base station, and the first base station sends the Internet access request to the target SGW through the user plane link, and the target SGW accesses the Internet under the control of the MME.
  • the request is delivered to the corresponding server, and then the server returns the resource corresponding to the online request to the mobile phone through the user plane link, so that the user can access the Internet normally.
  • the second base station sends a peer address to the first base station in the process of restoring the state of the user equipment by the first base station, and the first base station may establish a user plane corresponding to the user equipment according to the peer end address.
  • the link enables the user equipment to perform normal transmission of service data.
  • the embodiment of the present application provides a manner in which multiple first base stations send a peer address, which improves the flexibility of the solution.
  • the embodiment of the present application further provides another user plane link establishing method.
  • another embodiment of the user plane link establishing method in this embodiment of the present application includes:
  • the first base station sends a link switch request corresponding to the user equipment to the mobility management device.
  • the first base station When the user equipment in the suspended state needs to transmit data, the first base station is requested to restore its state, and the first base station sends the user equipment corresponding to the mobility management device in the process of restoring the state of the user equipment.
  • a path switch request that is, requesting to change a service data transmission channel corresponding to the user equipment.
  • the first base station receives an acknowledgement message corresponding to the link handover request.
  • the mobility management device After receiving the link switching request, the mobility management device updates the user plane link switching information according to the link switching request, that is, the node in the radio access bearer corresponding to the user equipment is switched from the second base station to the second base station, After the handover succeeds, the mobility management device sends a path switch request acknowledge message to the first base, where the acknowledgement message includes the peer address.
  • the peer address refers to the network element address of one end of the core network in the user plane corresponding to the user equipment.
  • the peer address is a peer address of the S1-U interface.
  • the peer address may be the peer address of the other interface, which is not limited herein.
  • the peer address may be an IP address of the SGW, and may be another network element address, which is not limited herein.
  • the link switch request acknowledgement message includes an Evolved Radio Access Bearer (E-RAB) handover uplink list
  • E-RAB handover uplink list includes an uplink
  • the transport layer address in the uplink bearer information is the peer address in the embodiment of the present application.
  • the uplink bearer information may include other information such as an E-RAB identifier, a GTP tunnel endpoint identifier, and the like, and is not limited herein.
  • the first base station establishes a user plane link corresponding to the user equipment according to the peer address.
  • the first base station After receiving the acknowledgement message, the first base station can establish a user plane link between the first base station and the network element corresponding to the peer end address. Specifically, the first base station may determine the target SGW according to the transport layer address in the uplink bearer information, and then establish a user plane link between the first base station and the target SGW through the S1-U interface, and then the user equipment Service data can be transmitted to the core network through the user plane link.
  • the first base station may obtain the peer address in the link switch confirmation message returned by the mobility management device, and then establish a user plane link corresponding to the user equipment according to the peer address, so that the user equipment can The normal transmission of business data.
  • an embodiment of the base station in this embodiment of the present application includes:
  • the sending module 601 is configured to send an acquisition request to the second base station.
  • the receiving module 602 is configured to receive a response message, where the response message includes a peer address.
  • the processing module 603 is configured to establish a user plane link corresponding to the user equipment according to the peer address received by the receiving module 602.
  • each module of the base station is similar to the process flow described in the foregoing embodiment shown in FIG. 2 and FIG. 4, and details are not described herein again.
  • the base station can obtain the peer address through the receiving module 602 in the process of restoring the state of the suspended user equipment, and the processing module 603 can establish the user plane link corresponding to the user equipment according to the peer address. So that the user equipment can normally transmit the service data.
  • the response message may include an extended cell, where the extended cell is used to indicate the peer address.
  • the extended cell may be a cell in the context information, or may be other cells independent of the context information. More specifically, the extended cell may be uplink GTP tunnel node information, or other information. The details are not limited herein.
  • the peer address may include an Internet Protocol address of the serving gateway.
  • FIG. 7 another embodiment of a base station provided by an embodiment of the present application includes:
  • the sending module 701 is configured to send, to the mobility management device, a link switching request corresponding to the user equipment;
  • the receiving module 702 is configured to receive an acknowledgement message corresponding to the link switch request, where the acknowledgement message includes a peer address.
  • the establishing module 703 is configured to establish a user plane link corresponding to the user equipment according to the peer address received by the receiving module 702.
  • each module of the base station is similar to the process flow described in the foregoing embodiment shown in FIG. 5, and details are not described herein again.
  • the first base station may obtain the peer address in the link switch confirmation message returned by the mobility management device by the receiving module 702, and then the establishing module 703 may establish the user plane corresponding to the user equipment according to the peer address.
  • the link enables the user equipment to perform normal transmission of service data.
  • the peer address may include an Internet Protocol address of the serving gateway.
  • another embodiment of a base station provided by an embodiment of the present application includes:
  • the receiving module 801 is configured to receive an acquisition request sent by the first base station.
  • a determining module 802 configured to determine a peer address according to the obtaining request received by the receiving module 801;
  • the sending module 803 is configured to send a response message to the first base station, where the response message includes a peer address.
  • each module of the base station is similar to the method described in the foregoing embodiments shown in FIG. 3 and FIG. 4, and details are not described herein again.
  • the second base station sends the peer address to the first base station by using the sending module 803 in the process of recovering the state of the user equipment by the first base station, so that the first base station can establish the
  • the user plane link corresponding to the user equipment enables the user equipment to perform normal service data transmission.
  • the base station may further include:
  • the bearer module is configured to carry the extended cell in the response message, and the extended cell is used to indicate the peer address.
  • the extended cell may be a cell in the context information, or may be other cells independent of the context information. More specifically, the extended cell may be uplink GTP tunnel node information, or other information. The details are not limited herein.
  • the peer address may include an Internet Protocol address of the serving gateway.
  • FIG. 9 is a schematic structural diagram of a base station according to an embodiment of the present application.
  • the base station 900 can vary considerably depending on configuration or performance, and can include one or more central processing units (CPUs) 922 (eg, one or more processors) and memory 932, one or More than one storage medium 930 storing storage application 942 or data 944 (eg, one or one storage device in Shanghai).
  • the memory 932 and the storage medium 930 may be short-term storage or persistent storage.
  • the program stored on storage medium 930 may include one or more modules (not shown), each of which may include a series of instruction operations in the base station. Still further, central processor 922 can be configured to communicate with storage medium 930 to perform a series of instruction operations in storage medium 930 on base station 900.
  • Base station 900 can also include one or more power supplies 926, one or more wired or wireless network interfaces 950, one or more input and output interfaces 958, and/or one or more operating systems 941, such as Windows ServerTM, Mac OS. XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • operating systems 941 such as Windows ServerTM, Mac OS. XTM, UnixTM, LinuxTM, FreeBSDTM and more.
  • the steps performed by the base station in the above-described embodiments shown in FIGS. 2 to 5 may be based on the base station structure shown in FIG.
  • the embodiment of the present application further provides a computer readable storage medium, which is used to store computer software instructions used by a base station in an embodiment of the present application, and includes a program for executing the base station. .
  • the base station can be a base station as described in the foregoing embodiments of Figures 2 to 5.
  • the embodiment of the present application further provides a computer program product, where the computer program product includes computer software instructions, which can be loaded by a processor to implement user plane link establishment of any one of the foregoing FIG. 2 to FIG. The process in the method.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • wire eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be stored by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
  • the disclosed system, apparatus, and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • a computer device which may be a personal computer, server, or network device, etc.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English full name: Read-Only Memory, English abbreviation: ROM), a random access memory (English full name: Random Access Memory, English abbreviation: RAM), magnetic A variety of media that can store program code, such as a disc or a disc.

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Abstract

本申请实施例公开了用户面链路建立方法，用于使得用户设备可以正常进行业务数据的传输。本申请实施例方法包括：第一基站向第二基站发送获取请求；所述第一基站接收所述获取请求对应的响应消息，所述响应消息包括对端地址；所述第一基站根据所述对端地址建立所述用户设备对应的用户面链路。

Description

用户面链路建立方法、基站及移动性管理设备
本申请要求于2017年05月04日提交中国专利局、申请号为201710309637.2、发明名称为“用户面链路建立方法、基站及移动性管理设备”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及用户面链路建立方法，基站及移动性管理设备。
背景技术
窄带物联网(Narrow Band Internet of Things，NB-IoT)是由第三代合作伙伴(3rd Generation Partnership Project，3GPP)标准化组织定义的一种技术标准，是一种专为物联网设计的窄带射频技术。NB-IoT构建于蜂窝网络，只消耗大约180KHz的带宽，可直接部署于全球移动通信系统(Global System for Mobile Communication，GSM)、通用移动通信系统(Universal Mobile Telecommunications System，UMTS)、长期演进(Long Term Evolution，LTE)等网络。
在窄带物联网协议中，当窄带用户设备(User Equipment)在某个站点被挂起(Suspend)后，可以在另一站点，即非挂起站点进行恢复(Resume)，即使用户设备恢复到挂起前的状态，这个过程称为跨站点恢复。
现有技术在实现跨站点恢复时，目标基站(即非挂起站点)会向挂起站点发送获取用户上下文请求(retrieve UE context request)给源基站(即挂起站点)，然后，源基站会将用户上下文信息返回给目标基站，目标基站即可根据该用户上下文信息对用户设备的状态进行恢复。
但是现有技术目标基站对用户设备的状态进行恢复的过程中，并不知道如何恢复该用户设备对应的用户面链路，从而使得用户设备无法正常进行业务数据的传输。
发明内容
本申请实施例提供了一种用户面链路建立方法，该方法包括：
当第一基站需要对处于挂起状态的用户设备进行恢复时，第一基站向第二基站发送获取请求，然后第一基站接收到第二基站返回的响应消息，该响应消息包括对端地址，第一基站根据该对端地址建立该用户设备对应的用户面链路。
应理解，对端地址指的是用户设备对应的用户平面中与基站连接的核心网网元的地址。具体地，在LTE网络中，该对端地址为S1-U接口的对端地址。
本申请实施例中，第一基站在恢复挂起的用户设备的状态的过程中，可以获取到对端地址，并根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
结合本申请实施例第一方面，在本申请实施例第一方面的第一种实现方式中，响应消息可以包括扩展信元，该扩展信元用于指示该对端地址。
本申请实施例提供了一种指示对端地址的具体方式，提高了方案的可实现性。
结合本申请实施例第一方面的第一种实现方式，在本申请实施例第一方面的第二种实现方式中，该扩展信元为上行GTP隧道节点信息。
应理解，上行GTP隧道节点在抽象语法标记协议中被定义为，S1接口所连接的SGW节点，该节点用于上行分组数据单元的传输。
本申请实施例可以通过上行GTP隧道节点信息来指示对端地址，无需额外定义扩展信元，降低了方案实现的复杂度。结合本申请实施例第一方面，第一方面的第一或第二种实现方式，在本申请实施例第一方面的第三种实现方式中，对端地址可以包括SGW的IP地址。本申请实施例提供了一种建立用户面链路的具体实现方式，提高了方案的可实现性。
结合本申请实施例第一方面的第一或第二种实现方式，在本申请实施例第一方面的第四种实现方式中，该获取请求用于获取用户设备的上下文信息，该响应消息包括该用户设备的上下文信息，则该扩展信元为上下文信息中的信元。
本申请实施例第二方面提供了一种用户面链路建立方法，该方法包括：
当第一基站需要对处于挂起状态的用户设备进行恢复时，第一基站向第二基站发送获取用户上下文请求，第二基站向第一基站返回该用户设备的上下文信息后，第一基站会向移动性管理设备发送该用户设备对应的链路切换请求，该移动性管理设备根据该链路切换请求更新该用户设备的用户面链路信息后，向第一基站返回确认消息，该确认消息中包括对端地址，第一基站接收该确认消息，并根据该对端地址建立用户设备对应的用户面链路。
应理解，对端地址指的是用户设备对应的用户平面中与基站连接的核心网网元的地址。具体地，在LTE网络中，该对端地址为S1-U接口的对端地址。本申请实施例中，移动性管理设备在第一基站对用户设备状态进行恢复的过程中，会向第一基站发送对端地址，从而使得第一基站可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
结合本申请实施例第二方面，在本申请实施例第二方面的第一种实现方式中，该对端地址可以包括服务网关的互联网协议地址。
本申请实施例提供了一种建立用户面链路的具体实现方式，提高了方案的可实现性。
本申请实施例第三方面提供了一种用户面链路建立方法，该方法包括：
当第一基站需要对处于挂起状态的用户设备进行恢复时，第一基站向第二基站发送获取请求，第二基站接收该获取请求，根据该获取请求确定对端地址，然后向第一基站发送包括该对端地址的响应消息，使得第二基站可以根据该对端地址建立用户面链路。
应理解，对端地址指的是用户设备对应的用户平面中与基站连接的核心网网元的地址。具体地，在LTE网络中，该对端地址为S1-U接口的对端地址。
本申请实施例中，第二基站在第一基站对用户设备状态进行恢复的过程中，会向第一基站发送对端地址，从而使得第一基站可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
结合本申请实施例第三方面，在本申请实施例第三方面的第一种实现方式中，第二基站在发送响应消息之前还会执行如下步骤：
第二基站将用于指示该对端地址的扩展信元承载在该响应消息中。
本申请实施例提供了一种指示对端地址的具体实现方式，提高了方案的可实现性。
结合本申请实施例第三方面的第一种实现方式，在本申请实施例第三方面的第二种实 现方式中，该扩展信元为上行GTP隧道节点信息。应理解，上行GTP隧道节点在抽象语法标记协议中被定义为，S1接口所连接的SGW节点，该节点用于上行分组数据单元的传输。
本申请实施例可以通过上行GTP隧道节点信息来指示对端地址，无需额外定义扩展信元，降低了方案实现的复杂度。
结合本申请实施例第三方面的第一或第二实现方式，在本申请实施例第三方面的第三种实现方式中，该获取请求用于获取用户设备的上下文信息，该响应消息包括该用户设备的上下文信息，则该扩展信元为上下文信息中的信元。
结合本申请实施例第三方面，第三方面的第一或第二种实现方式，在本申请实施例第三方面的第四种实现方式中，该对端地址可以包括服务网关的互联网协议地址。
本申请实施例第四方面提供了一种基站，该基站包括：
发送模块，用于向第二基站发送获取请求；
接收模块，用于接收该获取请求对应的响应消息，该响应消息包括对端地址；
处理模块，用于根据该接收模块接收的对端地址建立用户设备对应的用户面链路。
结合本申请实施例第四方面，在本申请实施例第四方面的第一种实现方式中，该响应消息包括扩展信元，该扩展信元用于指示该对端地址。
结合本申请实施例第四方面的第一种实现方式，在本申请实施例第四方面的第二种实现方式中，该扩展信元可以包括：上行GTP隧道节点信息。
结合本申请实施例第四方面，第四方面的第一或第二种实现方式，在本申请实施例第四方面的第三种实现方式中，该对端地址可以包括服务网关的互联网协议地址。
结合本申请实施例第四方面的第一或第二种实现方式，在本申请实施例第四方面的第四种实现方式中，该响应消息包括用户设备的上下文信息，该扩展信元为上下文信息中的信元。
本申请实施例第五方面提供了一种基站，该基站包括：
发送模块，用于向移动性管理设备MME发送用户设备对应的链路切换请求；
接收模块，用于接收该链路切换请求对应的确认消息，该确认消息包括对端地址；
建立模块，用于根据该接收模块接收的对端地址建立该用户设备对应的用户面链路。
结合本申请实施例第五方面，在本申请实施例第五方面的第一种实现方式中，该对端地址可以包括SGW的IP地址。
本申请实施例第六方面提供了一种基站，该基站包括：
接收模块，用于接收第一基站发送的获取请求；
确定模块，用于根据该接收模块接收的获取请求确定对端地址；
发送模块，用于向第一基站发送响应消息，该响应消息包括该对端地址。
结合本申请实施例第六方面，在本申请实施例第六方面的第一种实现方式中，该基站还包括：
承载模块，用于将扩展信元承载在该响应消息中，该扩展信元用于指示该对端地址。
结合本申请实施例第六方面的第一种实现方式，在本申请实施例第六方面的第二种实现方式中，该扩展信元为上行GTP隧道节点信息。
结合本申请实施例第六方面，第六方面的第一或第二种实现方式，在本申请实施例第六方面的第三种实现方式中，该对端地址包括服务网关的互联网协议地址。
结合本申请实施例第六方面的第一或第二种实现方式，在本申请实施例第六方面的第四种实现方式中，该响应消息包括该用户设备的上下文信息，该扩展信元为上下文信息的信元。本申请实施例第七方面提供了一种基站，该基站包括：收发器，存储器及处理器；
存储器用于存储程序；
处理器用于执行存储器中的程序，具体包括如下步骤：
控制收发器向第二基站发送获取请求；
控制收发器接收该获取请求对应的响应消息，该响应消息包括对端地址；
根据该对端地址建立用户设备对应的用户面链路。
结合本申请实施例第七方面，在本申请实施例第七方面的第一种实现方式中，该响应消息包括：扩展信元，该扩展信元用于指示该对端地址。
结合本申请实施例第七方面的第一种实现方式，在本申请实施例第七方面的第二种实现方式中，该扩展信元可以包括上行GTP隧道节点信息。
结合本申请实施例第七方面，第七方面的第一或第二种实现方式，在本申请实施例第七方面的第三种实现方式中，该对端地址包括服务网关的互联网协议地址。
结合本申请实施例第七方面的第一或第二种实现方式，在本申请实施例第七方面的第四种实现方式中，响应消息包括用户设备的上下文信息，该扩展信元为该上下文信息中的信元。
本申请实施例第八方面提供了一种基站，该基站包括：收发器，存储器及处理器；
存储器用于存储程序；
处理器用于执行存储器中的程序，具体包括如下步骤：
控制收发器向MME发送用户设备对应的链路切换请求；
控制收发器接收链路切换请求对应的确认消息，确认消息包括对端地址；
根据该对端地址建立用户设备对应的用户面链路。
结合本申请实施例第八方面，在本申请实施例第八方面的第一种实现方式中，该对端地址包括服务网关的互联网协议地址。
本申请实施例第九方面提供了一种基站，该基站包括：收发器，存储器及处理器；
存储器用于存储程序；
处理器用于执行存储器中的程序，具体包括如下步骤：
控制收发器接收第一基站发送的获取请求；
根据获取请求确定对端地址；
控制收发器向第一基站发送响应消息，响应消息包括对端地址。
结合本申请实施例第九方面，在本申请实施例第九方面的第一种实现方式中，该处理器还用于执行如下步骤：
将扩展信元承载在响应消息中，扩展信元用于指示对端地址。
结合本申请实施例第九方面的第一种实现方式，在本申请实施例第九方面的第二种实 现方式中，该扩展信元为上行GTP隧道节点信息。
结合本申请实施例第九方面的，第九方面的第一或第二种实现方式，在本申请实施例第九方面的第三种实现方式中，该对端地址包括服务网关的互联网协议地址。
结合本申请实施例第九方面的第一或第二种实现方式，在本申请实施例第七方面的第四种实现方式中，响应消息包括用户设备的上下文信息，该扩展信元为该上下文信息中的信元。
本申请实施例第十方面提供了一种计算机可读存储介质，该计算机可读存储介质中存储有指令，当其在计算机运行时，使得计算机执行上述第一方面至第三方面所描述的方法。
本申请实施例第十一方面提供了一种包含指令的计算机程序产品，当其在计算机运行时，使得计算机执行上述第一至第三方面所描述的方法。
从以上技术方案可以看出，本申请实施例具有以下优点：
本申请实施例中，第一基站在恢复挂起的用户设备的状态的过程中，可以获取到对端地址，并根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例。
图1是本申请实施例中用户面链路建立系统的一个实施例示意图；
图2是本申请实施例中用户面链路建立方法的一个实施例流程图；
图3是本申请实施例中用户面链路建立方法的另一实施例流程图；
图4是本申请实施例中用户面链路建立方法的另一实施例流程图；
图5是本申请实施例中用户面链路建立方法的另一实施例流程图；
图6是本申请实施例中基站的一个实施例示意图；
图7是本申请实施例中基站的另一实施例示意图；
图8是本申请实施例中基站的另一实施例示意图；
图9是本申请实施例中基站的另一实施例示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”、“第三”“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。
本申请实施例提供了用户面链路建立方法，用于在跨站点恢复场景下，建立有效的用 户面链路，使用户设备正常传输业务数据。
应理解，本申请实施例的用户面链路建立方法、基站及移动性管理设备可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)，全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统，第五代(5th-Generation，5G)移动通讯系统或后续演进的移动通讯系统等。
应理解，在本申请实施例中的用户设备包括但不限于移动台(Mobile Station，MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等，该用户设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，用户设备可以是移动电话(或称为“窝蜂”电话)、具有无线通信功能的计算机等，用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
本申请实施例中的基站可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(evolved Node B，eNB或e-NodeB)，本申请实施例并不限定。
为了便于理解本申请实施例，下面对本申请实施例所涉及的技术背景介绍：
在窄带物联网场景下，基站与UE之间存在挂起-恢复(suspend-resume)机制。该机制的目的在于降低UE与在无线资源控制(Radio Resource Control，RRC)联机模式(connected mode)与闲置模式(idle mode)之间切换时所需要交换的讯息数量，藉此节约UE的能量消耗。具体地，当用户设备不需要RRC联机时，基站可以向用户设备发送释放消息，该释放消息中包含有恢复(resume)标识以及释放原因，从而使得用户设备进入挂起模式，与此同时基站会保留该用户设备在RRC联机模式下所使用的无线接入承载以及相关安全性配置等信息，则当该用户设备需要进行数据传输，即需要与RRC联机时，只需要向基站发送携带有该恢复标识的恢复请求，基站就可以通过该恢复标识辨识该用户设备，恢复(resume)该用户设备的状态，即可以跳过相关的配置讯息交换，直接进入数据传输。
也就是说在窄带物联网场景中新增了一种挂起模式，当用户设备接收到包含恢复标识及释放原因的释放消息时，即进入挂起模式，即认为该用户设备处于挂起状态。而基站侧会保留有处于挂起状态的用户设备的无线接入承载，相关安全性配置等信息，若用户设备需要从挂起模式切换至RRC联机模式，进行数据传输，则需要先发起状态恢复的流程，即将恢复标识发送给基站，让基站将其对应的无线接入承载，安全配置等信息进行恢复。
为了便于理解本申请实施例，下面对本申请实施例所适用的其中一个系统架构进行简单介绍。如图1所示，该系统由接入网和核心网两个部分组成，其中接入网称为UMTS演进陆地无线接入网(Evolved UMTS Terrestrial Radio Access Network，E-UTRAN)，该核心 网称为演进的分组核心网(Evolved Packet Core，EPC)。
其中，E-UTRAN主要由用户设备和基站等网元构成；EPC主要由移动性管理设备(Mobility Management Entity，MME)、服务网关(Serving Gateway，SGW)、公用数据网网关(Public Data Network Gateway，PGW)和策略与计费规则计费单元(Policy and Charging Rules Function，PCRF)。
MME主要负责信令处理，具体功能有接入控制，移动性管理，会话管理，SGW与PGW的选择等。
SGW的主要功能是在MME的控制下进行数据包的路由和转发，即将接收到的用户数据转发给指定的PGW。
PCW的主要功能有会话和承载管理，互联网协议(Internet Protocol，IP)地址分配等。
PCRF主要用于提供可用的测量和计费控制决策。
IP协议业务是基于IP协议的业务，例如IP多媒体子系统业务(IP Multimedia Subsystem，IMS)等。
在E-UTRAN无线接口协议架构中，将协议栈划分为用户平面和控制平面。传输业务、应用数据的叫做用户平面，用户平面上承载的是用户的应用数据。例如，用户用手机上网，看到网页中的内容、聊天的内容等，这些都是通过用户平面传输的。用户平面的链路组成如图1所示。而传输信令信息的叫做控制平面，控制平面上承载的是用户和网络的交互控制信息。例如，用户在上网的时候，建立、维护、释放与网络间的链路时，都是通过控制平面来完成的。控制平面的链路组成如图1所示。
其中，Uu接口为用户设备与基站之间的通讯接口，Uu接口可以分为两个接口，一个用于控制平面的传输，例如RRC信令消息等；另一个用于用户平面的传输，例如广播消息等。
S1接口为基站与核心网之间的通讯接口，可以分为两个接口，一个称为S1-MME接口，为基站与移动性管理设备之间的接口，用于控制平面的传输，例如演进的无线接入承载(Evolved Radio Access Bearer，E-RAB)管理信息等；另一个称为S1-U接口，为基站与服务网关之间的接口，用于用户平面的传输，例如超文本传输协议数据等。
S11接口为移动性管理设备与服务网关之间的通讯接口，用于控制平面的传输，例如创建会话，删除会话等指令。
S5接口为服务网关与公用数据网网关之间的通讯接口，S5接口可以分为两个接口，一个用于控制平面的传输，另一个用于用户平面的传输。S8为漫游时，服务网关与公用数据网网关之间的通讯接口，也可以分为两个接口，一个用于控制平面的传输，另一个用于用户平面的传输。
Gx接口为公用数据网网关与测量与PCRF之间的通讯接口，用于控制平面的传输。
Rx接口为PCRF与外部互联网之间的通讯接口，用于控制平面的传输。
SGi为公用数据网网关与外部互联网之间的通讯接口，用于用户平面的传输。
应理解，图1中移动性管理设备仅是一个名字，名字本身对设备不构成限定，例如，该“移动性管理设备”还可能被替换为“移动性管理节点”，“移动性管理实体”或其他名 字；而且，该移动性管理设备可以对应一个包括除了移动性管理功能外，还有其他功能的设备，在此进行统一说明，以下不再赘述。
下面先介绍本申请实施例中的用户面链路传输方法，请参阅图2，本申请实施例中用户面链路传输方法的一个实施例包括：
201、第一基站向第二基站发送获取请求；
当用户设备满足挂起条件时，第二基站下达释放消息让该用户设备进入挂起模式，即使得该用户设备处于挂起状态，应理解，该释放消息中携带该用户设备对应的恢复标识。
当该用户设备附着至第二基站且需要传输数据时，会发起状态恢复流程，具体地，该用户设备会将其对应的恢复标识携带在恢复请求中，传递给第一基站。第一基站接收到该请求后，会向第二基站发送获取请求，该获取请求包含该恢复标识。
应理解，恢复标识一般是40个比特的数据，其中，前20个比特的数据用于标识挂起站点，后20个比特的数据由挂起站点自定义，本申请实施例中的挂起站点指的是第二基站。202、第一基站接收响应消息；
第二基站接收到该获取请求后，确定该恢复标识对应的用户设备，再确定该用户设备对应的对端地址，然后向第一基站发送响应消息，该响应消息包括该对端地址。第一基站接收该响应消息，获得该对端地址。
应理解，本申请实施例中，对端地址指的是用户设备对应的用户平面中核心网一端的网元地址。具体地，在LTE网络中，该对端地址为S1-U接口的对端地址。而在其他通信网络中，该对端地址可以为其他接口的对端地址，具体此处不作限定。
203、第一基站根据对端地址建立用户设备对应的用户面链路。
第一基站获得该对端地址后，建立该第一基站与该对端地址对应的网元之间的通讯连接，即建立该用户设备对应的用户面链路。
本申请实施例中，第一基站在恢复挂起的用户设备的状态的过程中，可以获取到对端地址，并根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
上面从第一基站的角度介绍了本申请实施例中的用户面链路建立方法，下面从第二基站的角度对本申请实施例中的用户面链路建立方法进行描述，请参阅图3，本申请实施例中用户面链路建立方法的另一实施例包括：
301、第二基站接收第一基站发送的获取请求；
当第一基站确定用户设备对应的挂起站点为第二基站，且需要对该用户设备的状态进行恢复时，第一基站向第二基站发送获取请求，第二基站接收该获取请求，携带有该用户设备对应的恢复标识。
应理解，恢复标识一般是40个比特的数据，其中，前20个比特的数据用于标识挂起站点，后20个比特的数据由挂起站点自定义，本申请实施例中的挂起站点指的是第二基站。
302、第二基站根据该获取请求确定对端地址；
第二基站接收到该获取请求后，对该获取请求中携带恢复标识进行识别，确定该恢复标识对应的用户设备，然后确定用于传输该用户设备数据的用户平面链路中，核心网一端 的网元地址，即对端地址。具体地，在LTE网络中，该对端地址为S1-U接口的对端地址。而在其他通信网络中，该对端地址可以为其他接口的对端地址，具体此处不作限定。
303、第二基站向第一基站发送响应消息。
第二基站确定用户设备的对端地址后，将该对端地址承载在响应消息中，然后向第一基站发送该响应消息，第一基站接收到该响应消息后，就可以建立该第一基站与该对端地址对应的网元之间的用户面链路。
本申请实施例中，第二基站在第一基站对用户设备状态进行恢复的过程中，会向第一基站发送对端地址，从而使得第一基站可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
为了便于理解本申请实施例，下面以一交互实施例对本申请实施例中的用户面链路建立方法进行描述，请参阅图4，本申请实施例中用户面链路建立方法的另一实施例包括：
401、第一基站向第二基站发送获取请求；
用户设备满足挂起条件，第二基站下达释放消息让该用户设备进入挂起模式，即使得该用户设备处于挂起状态，同时第二基站为该需要进入挂起状态的用户设备分配恢复标识，并将该恢复标识携带在释放消息中。
当该用户设备附着至第一基站且需要传输数据时，会发起状态恢复流程，具体地，该用户设备会将其对应的恢复标识携带在RRC连接请求中，传递给第一基站。第一基站接收到该请求后，会向第二基站发送获取请求，该获取请求用于获取该用户设备的上下文信息，且该获取请求包含该恢复标识。
应理解，该获取请求具体可以是获取用户上下文请求(retrieve UE context request)，也可以是其他请求，具体此处不作限定。
还应理解，本申请实施例中，第一基站与第二基站之间可以通过X2接口进行通信，也可以通过其他方式进行通信，具体此处不作限定。
402、第二基站根据该获取请求确定对端地址；
第二基站接收第一基站的获取请求后，根据该获取请求中的恢复标识确定用户设备的上下文信息，与此同时，第二基站还会确定该用户设备对应的用户平面中核心网一端的网元的地址，即对端地址。
403、第二基站向第一基站发送响应消息；
第二基站确定上下文信息及对端地址后，将该上下文信息及对端地址承载在响应消息中，然后向第一基站发送包括该上下文信息及对端地址的响应消息。本申请实施例中该响应消息获取用户上下文响应(retrieve UE context response)，也可以是其他消息，具体此处不作限定。
具体地，第二基站可以在响应消息中新增一个或多个扩展信元，然后将该对端地址承载在该扩展信元中。
该扩展信元可以是上行通用分组无线服务隧道协议(General Packet Radio Service Tunnelling Protocol，GTP)隧道节点信息，也可以是其他信息，比如说新定义的一个专门用于指示对端地址的信元，比如说系统中存在的其他同样具有对端地址指示功能的信元 等，此处不再一一列举。
应理解，该扩展信元可以是上下文信息中的信元，也可以是独立于上下文信息的其他信元，具体此处不作限定。也就是说，本申请实施例中，可以将对端地址包括在上下文信息中发送给第一基站，也可以将对端地址与上下文信息独立开，同时将上下文信息及对端地址发送给第一基站。
应理解，在抽象语法标记(Abstract Syntax Notation One，ASN.1)协议中，上行GTP隧道节点被定义为，S1接口所连接的SGW节点，用于上行分组数据单元(packet data unit，PDUs)之间的传输。也就是说，上行GTP隧道节点可以用于指示对端地址，该对端地址具体可以是SGW的IP地址。需要说明的是，对端地址具体除了可以是SGW的IP地址，还可以是核心网中用于与基站进行用户平面数据传输的网元的地址，具体此处不作限定。
需要说明的是，本申请实施例中，上下文信息可以包括需要建立的E-RAB，E-RAB的标识，每个E-RAB级别的服务质量参数或承载类型，还可以包括其他信息，具体此处不作限定。而这些信息与该上行GTP隧道节点信息可以作为E-RAB的建立列表中的内容，携带在响应消息中。而除了上下文信息和上行GTP隧道节点信息，响应消息也还可以包括其他用于响应该获取请求的信息，具有此处不作限定。
404、第一基站根据对端地址建立用户设备对应的用户面链路。
第一基站接收到第二基站发送的响应消息后，对用户设备的状态进行恢复，使得用户设备恢复到挂起前的状态，具体地，第一基站可以根据该响应消息中的上下文信息恢复该用户设备的无线接入承载，安全性配置等信息同时，还会建立该第一基站与该对端地址对应的网元之间的用户面链路。
具体地，第一基站可以根据上行GTP隧道节点信息所指示的对端地址确定核心网中的目标SGW，然后通过S1-U接口建立该第一基站与该目标SGW之间的用户面链路。
另一方面，第一基站在用户设备的状态进行恢复的过程中，还可以向核心网中的移动性管理设备发送链路切换请求(path switch request)，使得核心网侧可以成功更新用户面链路切换信息。
成功建立用户面链路，并在核心侧完成用户面链路切换信息的更新后，用户设备即可以通过该用户面链路进行业务数据的传输。比如说，用户用手机进行上网时，手机会将上网请求发送到第一基站，第一基站通过该用户面链路将该上网请求发送到目标SGW中，目标SGW在MME的控制下将该上网请求传递至对应的服务器中，然后服务器再通过该用户面链路将上网请求对应的资源返回到该手机，使得用户可以正常上网。
本申请实施例中，第二基站在第一基站对用户设备状态进行恢复的过程中，会向第一基站发送对端地址，第一基站可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
其次，本申请实施例提供了多种第一基站发送对端地址的方式，提高了方案的灵活性。
本申请实施例还提供了另一种用户面链路建立方法，请参阅图5，本申请实施例中用户面链路建立方法的另一实施例包括：
501、第一基站向移动性管理设备发送用户设备对应的链路切换请求；
当处于挂起状态的用户设备需要传数据时，会请求第一基站将其状态进行恢复，第一基站在对该用户设备的状态进行恢复的过程中，会向移动性管理设备发送用户设备对应的链路切换请求(path switch request)，即请求改变该用户设备对应的业务数据传输通道。
502、第一基站接收链路切换请求对应的确认消息；
移动性管理设备接收到该链路切换请求后，根据该链路切换请求更新用户面链路切换信息，即将该用户设备对应的无线接入承载中的节点由第二基站切换到第二基站，切换成功后，移动性管理设备会向第一基发送链路切换请求确认消息(path switch request acknowledge)，该确认消息中包括对端地址。
应理解，本申请实施例中，对端地址指的是用户设备对应的用户平面中核心网一端的网元地址。具体地，在LTE网络中，该对端地址为S1-U接口的对端地址。而在其他通信网络中，该对端地址可以为其他接口的对端地址，具体此处不作限定。更具体地，该对端地址可以是SGW的IP地址，还可以是其他网元地址，具体此处不作限定。
需要说明的是，链路切换请求确认消息中包括有演进的无线接入承载(Evolved Radio Access Bearer，E-RAB)切换上行链路列表，该E-RAB切换上行链路列表中包含有上行链路承载信息，则本申请实施例中，该上行链路承载信息中的传输层地址即为本申请实施例中的对端地址。还应理解，该上行链路承载信息除了包括有传输层地址外，还可以包括E-RAB的标识、GTP隧道端点标识等其他信息，具体此处不作限定。
503、第一基站根据对端地址建立用户设备对应的用户面链路。
第一基站接收确认消息后，即可建立该第一基站与该对端地址对应的网元之间的用户面链路。具体地，第一基站可以根据该上行链路承载信息中的传输层地址确定目标SGW，然后通过S1-U接口建立该第一基站与该目标SGW之间的用户面链路，然后用户设备就可以通过该用户面链路将业务数据传输到核心网中。
本申请实施例中，第一基站可以在移动性管理设备返回的链路切换确认消息中获得对端地址，然后可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
上面介绍了本申请实施例中的用户面链路建立方法，下面介绍本申请实施例中的基站，请参阅图6，本申请实施例中基站的一个实施例包括：
发送模块601，用于向第二基站发送获取请求；
接收模块602，用于接收响应消息，该响应消息包括对端地址；
处理模块603，用于根据接收模块602接收的对端地址建立用户设备对应的用户面链路。
上述图6对应的实施例中，基站各模块所执行的流程与前述图2及图4所示的实施例中描述的方法流程类似，此处不再赘述。
本申请实施例中，基站在恢复挂起的用户设备的状态的过程中，可以通过接收模块602获取到对端地址，处理模块603可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
应理解，基于上述图6对应的基站，在本申请实施例基站的另一实施例中，响应消息 可以包括扩展信元，该扩展信元用于指示对端地址。具体地，该扩展信元可以是上下文信息中的信元，也可以是独立于上下文信息的其他信元，更具体地，该扩展信元可以是上行GTP隧道节点信息，也可以是其他信息，具体此处不作限定。
应理解，基于上述图6对应的基站，在本申请实施例基站的另一实施例中，对端地址可以包括服务网关的互联网协议地址。请参阅图7，本申请实施例提供的基站的另一实施例包括：
发送模块701，用于向移动性管理设备发送用户设备对应的链路切换请求；
接收模块702，用于接收链路切换请求对应的确认消息，该确认消息包括对端地址；
建立模块703，用于根据接收模块702接收的对端地址建立用户设备对应的用户面链路。
上述图7对应的实施例中，基站各模块所执行的流程与前述图5所示的实施例中描述的方法流程类似，此处不再赘述。
本申请实施例中，第一基站可以通过接收模块702在移动性管理设备返回的链路切换确认消息中获得对端地址，然后建立模块703可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
应理解，基于上述图7对应的基站，在本申请实施例基站的另一实施例中，该对端地址可以包括服务网关的互联网协议地址。
请参阅图8，本申请实施例提供的基站的另一实施例包括：
接收模块801，用于接收第一基站发送的获取请求；
确定模块802，用于根据接收模块801接收的获取请求确定对端地址；
发送模块803，用于向第一基站发送响应消息，该响应消息包括对端地址。
上述图8对应的实施例中，基站各模块所执行的流程与前述图3及图4所示的实施例中描述的方法流程类似，此处不再赘述。
本申请实施例中，第二基站在第一基站对用户设备状态进行恢复的过程中，会通过发送模块803向第一基站发送对端地址，从而使得第一基站可以根据该对端地址建立该用户设备对应的用户面链路，使得用户设备可以正常进行业务数据的传输。
应理解，基于上述图8对应的基站，在本申请实施例基站的另一实施例中，基站还可以包括：
承载模块，用于将扩展信元承载在响应消息中，扩展信元用于指示对端地址。
具体地，该扩展信元可以是上下文信息中的信元，也可以是独立于上下文信息的其他信元，更具体地，该扩展信元可以是上行GTP隧道节点信息，也可以是其他信息，具体此处不作限定。
应理解，基于上述图8对应的基站，在本申请实施例基站的另一实施例中，对端地址可以包括服务网关的互联网协议地址。
上面从功能模块的角度介绍了本申请实施例中的基站，下面从实体硬件的角度介绍本申请实施例中的基站，请参阅图9，图9是本申请实施例提供的一种基站结构示意图，该基站900可因配置或性能不同而产生比较大的差异，可以包括一个或一个以上中央处理器 (central processing units，CPU)922(例如，一个或一个以上处理器)和存储器932，一个或一个以上存储应用程序942或数据944的存储介质930(例如一个或一个以上海量存储设备)。其中，存储器932和存储介质930可以是短暂存储或持久存储。存储在存储介质930的程序可以包括一个或一个以上模块(图示没标出)，每个模块可以包括对基站中的一系列指令操作。更进一步地，中央处理器922可以设置为与存储介质930通信，在基站900上执行存储介质930中的一系列指令操作。
基站900还可以包括一个或一个以上电源926，一个或一个以上有线或无线网络接口950，一个或一个以上输入输出接口958，和/或，一个或一个以上操作系统941，例如Windows ServerTM，Mac OS XTM，UnixTM,LinuxTM，FreeBSDTM等等。
上述图2至图5所示实施例中由基站所执行的步骤可以基于该图9所示的基站结构。
本申请实施例还提供了一种计算机可读存储介质，该计算机可读存储介质用于储存为本申请实施例中的基站所用的计算机软件指令，其包括用于执行为该基站所设计的程序。
该基站可以如前述图2至图5所示实施例所描述的基站。
本申请实施例还提供了一种计算机程序产品，该计算机程序产品包括计算机软件指令，该计算机软件指令可通过处理器进行加载来实现上述图2至图5中任意一项的用户面链路建立方法中的流程。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。
所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存储的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的 部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(英文全称：Read-Only Memory，英文缩写：ROM)、随机存取存储器(英文全称：Random Access Memory，英文缩写：RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。

Claims (27)

  1. 一种用户面链路建立方法，其特征在于，包括：
    第一基站向第二基站发送获取请求；
    所述第一基站接收所述获取请求对应的响应消息，所述响应消息包括对端地址；
    所述第一基站根据所述对端地址建立用户设备对应的用户面链路。
  2. 根据权利要求1所述的方法，其特征在于，所述响应消息包括扩展信元，所述扩展信元用于指示所述对端地址。
  3. 根据权利要求2所述的方法，其特征在于，所述扩展信元为上行通用分组无线服务隧道协议GTP隧道节点信息。
  4. 根据权利要求2或3所述的方法，其特征在于，所述响应消息包括所述用户设备的上下文信息，所述扩展信元为所述上下文信息中的信元。
  5. 根据权利要求1至3中任一项所述的方法，其特征在于，所述对端地址包括服务网关SGW的互联网协议IP地址。
  6. 一种用户面链路建立方法，其特征在于，包括：
    第一基站向移动性管理设备MME发送用户设备对应的链路切换请求；
    所述第一基站接收所述链路切换请求对应的确认消息，所述确认消息包括对端地址；
    所述第一基站根据所述对端地址建立所述用户设备对应的用户面链路。
  7. 根据权利要求6所述的方法，其特征在于，所述对端地址包括SGW的IP地址。
  8. 一种用户面链路建立方法，其特征在于，包括：
    第二基站接收第一基站发送的获取请求；
    所述第二基站根据所述获取请求确定对端地址；
    所述第二基站向所述第一基站发送响应消息，所述响应消息包括所述对端地址。
  9. 根据权利要求8所述的方法，其特征在于，所述第二基站根据获取请求确定对端地址之后以及所述第二基站向所述第一基站发送所述响应消息之前包括：
    所述第二基站将扩展信元承载在所述响应消息中，所述扩展信元用于指示所述对端地址。
  10. 根据权利要求9所述的方法，其特征在于，所述扩展信元为上行GTP隧道节点信息。
  11. 根据权利要求9或10所述的方法，其特征在于，所述响应消息包括用户设备的上下文信息，所述扩展信元为所述上下文信息中的信元。
  12. 根据权利要求8至10中任一项所述的方法，其特征在于，所述对端地址包括服务网关SGW的互联网协议IP地址。
  13. 一种基站，其特征在于，包括：
    发送模块，用于向第二基站发送获取请求；
    接收模块，用于接收所述获取请求对应的响应消息，所述响应消息包括对端地址；
    处理模块，用于根据所述接收模块接收的所述对端地址建立用户设备对应的用户面链路。
  14. 根据权利要求13所述的基站，其特征在于，所述响应消息包括扩展信元，所述扩展信元用于指示所述对端地址。
  15. 根据权利要求14所述的基站，其特征在于，所述扩展信元包为上行GTP隧道节点信息。
  16. 根据权利要求13至15中任一项所述的基站，其特征在于，所述对端地址包括SGW的IP地址。
  17. 根据权利要求14或15所述的基站，其特征在于，所述响应消息包括所述用户设备的上下文信息，所述扩展信元为所述上下文信息中的信元。
  18. 一种基站，其特征在于，包括：
    发送模块，用于向移动性管理设备MME发送用户设备对应的链路切换请求；
    接收模块，用于接收所述链路切换请求对应的确认消息，所述确认消息包括对端地址；
    建立模块，用于根据所述接收模块接收的所述对端地址建立所述用户设备对应的用户面链路。
  19. 根据权利要求18所述的基站，其特征在于，所述对端地址包括SGW的IP地址。
  20. 一种基站，其特征在于，包括：
    接收模块，用于接收第一基站发送的获取请求；
    确定模块，用于根据所述接收模块接收的所述获取请求确定对端地址；
    发送模块，用于向所述第一基站发送响应消息，所述响应消息包括所述对端地址。
  21. 根据权利要求20所述的基站，其特征在于，所述基站还包括：
    承载模块，用于将扩展信元承载在所述响应消息中，所述扩展信元用于指示所述对端地址。
  22. 根据权利要求21所述的基站，其特征在于，所述扩展信元为上行GTP隧道节点信息。
  23. 根据权利要求20至22中任一项所述的基站，其特征在于，所述对端地址包括SGW的IP地址。
  24. 根据权利要求20或21所述的基站，其特征在于，所述响应消息包括用户设备的上下文信息，所述扩展信元为所述上下文信息中的信元。
  25. 一种基站，其特征在于，包括：收发器，存储器及处理器；
    所述存储器用于存储程序；
    所述处理器用于执行所述存储器中的程序，具体包括如下步骤：
    控制所述收发器向第二基站发送获取请求；
    控制所述收发器接收所述获取请求对应的响应消息，所述响应消息包括对端地址；
    根据所述对端地址建立所述用户设备对应的用户面链路。
  26. 一种基站，其特征在于，包括：收发器，存储器及处理器；
    所述存储器用于存储程序；
    所述处理器用于执行所述存储器中的程序，具体包括如下步骤：
    控制所述收发器向MME发送用户设备对应的链路切换请求；
    控制所述收发器接收所述链路切换请求对应的确认消息，所述确认消息对端地址；
    根据所述对端地址建立所述用户设备对应的用户面链路。
  27. 一种基站，其特征在于，包括：收发器，存储器及处理器；
    所述存储器用于存储程序；
    所述处理器用于执行所述存储器中的程序，具体包括如下步骤：
    控制所述收发器接收第一基站发送的获取请求；
    根据所述获取请求确定对端地址；
    控制所述收发器向所述第一基站发送响应消息，所述响应消息包括所述对端地址。
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