WO2017114436A1 - 一种用户连接的建立方法及装置 - Google Patents

一种用户连接的建立方法及装置 Download PDF

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Publication number
WO2017114436A1
WO2017114436A1 PCT/CN2016/112794 CN2016112794W WO2017114436A1 WO 2017114436 A1 WO2017114436 A1 WO 2017114436A1 CN 2016112794 W CN2016112794 W CN 2016112794W WO 2017114436 A1 WO2017114436 A1 WO 2017114436A1
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Prior art keywords
network element
identifier
scef
correspondence
user
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PCT/CN2016/112794
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English (en)
French (fr)
Inventor
蔡慧
Original Assignee
中国移动通信集团公司
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.)
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Priority claimed from CN201511001128.0A external-priority patent/CN106922019B/zh
Priority claimed from CN201511021555.5A external-priority patent/CN106937267B/zh
Application filed by 中国移动通信集团公司 filed Critical 中国移动通信集团公司
Publication of WO2017114436A1 publication Critical patent/WO2017114436A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing

Definitions

  • the present invention relates to the field of mobile internet, and in particular to a method and apparatus for establishing a user connection.
  • the UE When the user equipment (UE) does not have any data to download or upload, the UE is in an idle state.
  • the Idle state is beneficial to the UE to save power, and also avoids the UE from moving, frequently initiates a handover procedure to the network, and increases signaling processing on the network side. load.
  • the service paging capability can usually trigger the Mobile Management Entity (MME) paging user from the data plane, or the Packet Data Network Gateway (PGW)/Serving Gateway (SGW) triggers the MME to page the user, but triggers the MME paging from the data plane.
  • MME Mobile Management Entity
  • PGW Packet Data Network Gateway
  • SGW Serving Gateway
  • the method includes: 1. The S-GW receives the downlink data packet sent to the UE in the Idle state, and the S-GW buffers the downlink data packet; 2.
  • the S-GW sends a downlink data notification message to the MME; if the S-GW receives the UE, another When the downlink data packet is used, the S-GW buffers the data packets, but does not send a new downlink data notification message; 3.
  • the MME sends a paging message to the base station (eNodeB) of the tracking area registered by each UE; 4.
  • the eNodeBs seeks Calling UE; 5, the UE triggers the service request process, establishes a connection with the network side, and establishes a downlink data channel.
  • the technical problem to be solved by the present invention is to provide a method and a device for establishing a user connection, so as to solve the problem that the MME paging user is affected by the congestion of the gateway from the data plane in the Idle state, and the data delay is large.
  • the user service experience is poor; or when the MME paging user is triggered from the PGW/SGW, the PGW/SGW needs to temporarily store the forwarding data, the network element processing load is heavy, and the resulting network cannot be charged.
  • an embodiment of the present invention provides a method for establishing a user connection, where the method includes:
  • the determining needs to establish a link with the UE including:
  • connection establishment request with the UE sent by the server of the third-party service is received, it is determined that a link with the UE needs to be established.
  • the acquiring and recording the first correspondence between the identifier of the user equipment UE and the first network element to which the UE is currently attached includes:
  • the acquiring and recording the first correspondence between the identifier of the user equipment UE and the first network element to which the UE is currently attached includes:
  • the method further includes:
  • the method further includes:
  • the determining, by the identifier of the UE, the first network element that matches the UE that is to receive the data packet including:
  • the first network element having the first identifier is the first network element that matches the UE of the data packet to be received.
  • the obtaining the first correspondence includes:
  • the obtaining the identifier of the UE from the to-be-received data packet includes:
  • the link establishment request initiated by the first network element to the UE that is to receive the data packet is a request for establishing a transmission link between the server and the UE of the data packet to be received.
  • the method further includes: before sending the link establishment request to the first network element, the method further includes:
  • the method further includes:
  • the identifier of the first network element corresponding to the UE that is to receive the data packet is updated in the first correspondence relationship.
  • the identifier of a network element is updated in the first correspondence relationship.
  • the first network element is a mobility management entity MME or a software defined network controller SDN controller.
  • the embodiment of the invention further provides a method for establishing a user connection, the method comprising:
  • the network element identifier of the first network element to which the user equipment UE is currently attached is obtained by the network element PCRF of the policy and charging rule function;
  • the policy and charging rule function network element PCRF obtains the network element identifier of the first network element that the user equipment UE currently attaches, including:
  • the network element identifier of the first network element to which the UE is currently attached is obtained from the packet data network gateway PGW/serving gateway SGW.
  • the policy and charging rule function network element PCRF obtains the network element identifier of the first network element that is currently attached by the user equipment UE, and further includes:
  • the network element identifier of the first network element to which the UE is currently attached After acquiring the network element identifier of the first network element to which the UE is currently attached to the PGW/SGW, subscribe to the first network element change event of the UE to the PGW/SGW, and receive the PGW/ When the first network element of the UE is reported by the SGW, the network element identifier of the first network element to which the UE is currently attached is re-acquired.
  • the method further includes:
  • the embodiment of the invention further provides a method for establishing a user connection, the method comprising:
  • the first network element sends a registration message to the SCEF according to the indication message, where the registration message includes a user identifier of the UE and a network element identifier of the first network element, so that the SCEF records the The first correspondence between the user identifier of the UE and the first network element.
  • the obtaining the indication message for sending the registration message to the capability open network element SCEF includes:
  • the obtaining the indication message for sending the registration message to the capability open network element SCEF includes:
  • the first network element attached to the UE is used to download the user context data of the network side, and the indication message for sending the registration message to the SCEF is obtained according to the user context data.
  • the embodiment of the invention further provides a capability open network element SCEF device, including:
  • An acquiring and recording module configured to acquire and record a first correspondence between an identifier of the user equipment UE and a first network element to which the UE is currently attached;
  • connection module configured to determine, according to the first correspondence that is recorded by the acquiring and recording module, a first network element that is currently attached by the UE, and The first network element sends a link setup request.
  • the connection module is configured to determine that a link with the UE needs to be established if the connection establishment request with the UE is sent by the server that receives the third-party service.
  • the obtaining and recording module includes:
  • a first receiving unit configured to receive a network element identifier of a first network element that is currently attached by the UE that is sent by the policy and charging rule function unit PCRF;
  • a first establishing unit configured to establish, according to the network element identifier received by the first receiving unit, a first correspondence between a user identifier of the UE and a first network element to which the UE is currently attached.
  • the obtaining and recording module includes:
  • a second receiving unit configured to receive a registration message that is sent by the first network element that is currently attached by the UE, where the registration message includes a user identifier of the UE and a network element identifier of the first network element;
  • a second establishing unit configured to establish, according to the registration message received by the second receiving unit The first correspondence between the user identifier of the UE and the first network element to which the UE is currently attached.
  • a receiving and maintaining module configured to receive information about a current access state of the UE sent by a policy and charging rule function unit PCRF, and maintain a current access state of the UE, where the access state includes a connection state and an idle state. And sending a link establishment request to the first network element when the access state is an idle state.
  • a first acquiring unit configured to acquire an identifier of the UE from the to-be-received data packet
  • the first determining unit is configured to determine, according to the identifier of the UE, a first network element that matches the UE of the data packet to be received.
  • the first determining unit configured to determine, in the acquired first correspondence, the first network element identifier corresponding to the identifier of the UE that is to receive the data packet, to obtain the first identifier;
  • the first network element having the first identifier is the first network element that matches the UE of the data packet to be received.
  • the first receiving unit is configured to receive the first correspondence that is reported by the first network element and/or the user home server HSS.
  • the first receiving unit is configured to receive an identifier of the UE that is to be received by the server, and correspondingly, the first network element sends the link to the UE that is to receive the data packet.
  • a request is established to establish a transmission link between the server and the UE of the data packet to be received.
  • the acquiring and recording module is configured to receive a state of the UE to be received by the first network element, and send the location to the first network element if the state of the UE is an idle state The link establishment request.
  • a receiving and maintaining module configured to: if the first network element attached to the UE to be received by the UE is changed, update the first network element corresponding to the UE that is to receive the data packet in the first correspondence relationship
  • the identifier is the identifier of the first network element after the change is attached.
  • the first network element is a mobility management entity MME or a software defined network controller SDN controller.
  • the embodiment of the invention further provides a PCRF device for the policy and charging rule function network element, comprising:
  • a first sending module configured to send, by the PCRF, the network element identifier of the first network element that is currently attached by the acquiring module, and the SCEF establishes and maintains the user of the UE, to the capability open network element (SCEF) And identifying a first correspondence between the first network element to which the UE is currently attached.
  • the obtaining module includes: a determining unit, configured to determine, when the third-party service access authentication and authorization is performed on the UE, whether the third-party service has enabled a paging optimization function; and an obtaining unit, configured to determine If the result of the determination is YES, the network element identifier of the first network element to which the UE is currently attached is obtained from the packet data network gateway PGW/serving gateway SGW.
  • the obtaining module further includes:
  • a subscription and receiving unit configured to further subscribe the first network element change of the UE to the PGW/SGW after the acquiring unit acquires the network element identifier of the first network element currently attached by the UE to the PGW/SGW The event, and when receiving the first network element change event of the UE reported by the PGW/SGW, re-acquiring the network element identifier of the first network element currently attached by the UE.
  • a second sending module configured to send information about a current access state of the UE to the SCEF, so that the SCEF receives and maintains a current access state of the UE, where the access state includes a connected state and an idle state. state.
  • the embodiment of the invention further provides a first network element device, including:
  • An acquiring module configured to acquire, by the first network element that the user equipment UE is currently attached, an indication message for sending a registration message to the capability open network element SCEF;
  • a sending module configured to send, by the first network element, a registration message to the SCEF according to the indication message acquired by the acquiring module, where the registration message includes a user identifier of the UE and the first The network element identifier of the network element, so that the SCEF records the first correspondence between the user identifier of the UE and the first network element.
  • the obtaining module includes:
  • the first obtaining unit is configured to receive an indication message that is sent by the policy and charging rule function network element PCRF to send a registration message to the SCEF.
  • the obtaining module includes:
  • a second acquiring unit configured to download the user context data of the network side by using the first network element that is attached to the UE, and obtain the indication message that the registration message is sent to the SCEF according to the user context data.
  • the network element identifier of the first network element to which the UE is currently attached is obtained by using the PCRF, and the network element identifier of the first network element to which the UE is currently attached is sent to the SCEF, or by the UE.
  • the first network element that is currently attached obtains the indication message, it sends a registration message to the SCEF according to the indication message, so that the SCEF acquires and records the first correspondence between the user identifier of the UE and the first network element; and sends the server with the third party service received by the SCEF.
  • the SCEF determines the first network element currently attached by the UE according to the first correspondence, and sends a link establishment request to the first network element to page the UE by using the first network element.
  • the paging method of the signaling plane is provided by the method for establishing the user connection of the present invention, which reduces the paging delay of the user, reduces the load on the gateway, optimizes the experience of the third-party service, and realizes the charging at the signaling level.
  • FIG. 1 is a schematic flowchart of a PGW/SGW triggering an MME to page a user in the prior art
  • 2-1 is a schematic flowchart 1 of a method for establishing a user connection according to a first embodiment of the present invention
  • FIG. 2-2 is a schematic flowchart 2 of a method for establishing a user connection according to a first embodiment of the present invention
  • 2-3 is a schematic flowchart 3 of a method for establishing a user connection according to a first embodiment of the present invention
  • Figure 3 is a schematic diagram 1 of a scene according to a first embodiment of the present invention.
  • Figure 4 is a schematic diagram 2 of a scenario according to a first embodiment of the present invention.
  • Figure 5 is a schematic diagram 3 of a scene according to a first embodiment of the present invention.
  • FIG. 6 is a schematic flowchart diagram of a method for establishing a user connection according to a second embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of a method for establishing a user connection according to a third embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a capability open network element device according to a fourth embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a PCRF device of a policy and charging rule function network element according to a fifth embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a first network element device according to a sixth embodiment of the present invention.
  • FIG. 11 shows an example 1 of a method for establishing a user connection according to an embodiment of the present invention
  • FIG. 12 shows an example 2 of a method for establishing a user connection according to an embodiment of the present invention
  • FIG. 13 shows an example 3 of a method for establishing a user connection according to an embodiment of the present invention.
  • FIG. 2-1 a schematic flowchart of the method for establishing a user connection is provided in this embodiment:
  • Step 10 Acquire and record the first correspondence between the identifier of the user equipment UE and the first network element to which the UE is currently attached;
  • Step 20 If it is determined that a link with the UE needs to be established, determine, according to the first correspondence, a first network element currently attached by the UE, and send a link establishment to the first network element. request.
  • the following is a schematic flowchart of a method for establishing a user connection according to the first embodiment of the present invention.
  • the method for establishing the user connection may include:
  • Step 101 Acquire and record a first correspondence between the user identifier of the user equipment UE and the first network element to which the UE is currently attached.
  • the first correspondence between the user identifier of the UE that is contracted with the third party service and the first network element to which the UE is currently attached is obtained and recorded.
  • Step 102 If the connection establishment request with the UE is received by the server that receives the third-party service, determine, according to the first correspondence, the first network element that the UE currently attaches, and send the link to the first network element. A request is established to page the UE through the first network element.
  • the link when the third-party service receives the service downlink data of the UE, the link establishes a link establishment request with the UE, where the service downlink data is stored on the server of the third-party service; and the mobile Internet side receives the link establishment.
  • the first network element to which the UE is currently attached is determined according to the first correspondence, and a link establishment request is sent to the first network element to page the UE by using the first network element, so that the UE triggers the service request process and establishes
  • the connection with the network side establishes a downlink data channel, so that the server of the third-party service delivers service downlink data of the UE.
  • the method for establishing a user connection provided by the first embodiment of the present invention may be implemented by a separate network element, or may be implemented based on a Home Subscriber Server (HSS)/PGW; here, through the mobile Internet side capability open network
  • HSS Home Subscriber Server
  • PGW Packet Data Network Gateway
  • the meta SCEF performs a method of establishing the user connection provided by the first embodiment.
  • the step of acquiring and recording the first correspondence between the user identifier of the user equipment UE and the first network element to which the UE is currently attached may include The following information: the network element identifier of the first network element to which the UE is currently attached, which is sent by the network element PCRF, and the user identifier of the UE and the first network element to which the UE is currently attached. A correspondence.
  • the network element identifier of the first network element to which the UE and the UE are currently attached is obtained by the PCRF and sent to the SCEF, and the SCEF receives and establishes the first between the user identifier of the UE and the network element identifier of the first network element. Correspondence relationship.
  • step 101 is obtained.
  • the step of taking and recording the first correspondence between the user identifier of the user equipment UE and the first network element to which the UE is currently attached includes:
  • the registration message includes the user identifier of the UE and the network element identifier of the first network element; and according to the registration message, the user identifier of the UE and the current attachment of the UE are established.
  • the registration message is sent to the SCEF by the first network element to which the UE is currently attached, and the SCEF receives the registration message and establishes a first correspondence between the user identifier of the UE and the first network element to which the UE is currently attached according to the registration message.
  • the foregoing method further includes:
  • the third-party service subscribed by the UE has a paging optimization function.
  • the third party service capability opening contract is added to the mobile internet service subscription data, and when a third party service is contracted, the paging optimization function is activated for the third party service.
  • the first network element is a mobility management network element.
  • the first network element may be a mobility management entity (MME).
  • FIG. 2-3 Another processing scenario is provided in conjunction with Figures 2-3, and an embodiment of the data transmission method provided by the present invention is applied to the SCEF.
  • the method includes:
  • Step 201 Acquire an identifier of a terminal UE of a data packet to be received.
  • the server needs to send a downlink data packet to the UE in the Idle state, first sending the identifier of the UE to the SCEF, and the SCEF receives the identifier of the UE, where the identifier of the UE may be the International Mobile Subscriber Identity (IMSI, International Mobile) of the UE. Subscriber Identification Number), Temporary Mobile Subscriber Identity (TMSI), or the UE The SIM number of the Subscriber Identity Module (SIM).
  • IMSI International Mobile Subscriber Identity
  • TMSI Temporary Mobile Subscriber Identity
  • SIM Subscriber Identity Module
  • Step 202 Determine, according to the identifier of the UE, a first network element that matches the UE that is to receive the data packet.
  • the first network element is a network element having a mobility management function, and may be an MME or a software defined network controller (SDN controller).
  • the SCEF obtains a first correspondence, where the first correspondence records the correspondence between the identifier of the UE and the identifier of the MME to which the UE is attached, and the SCEF receives the server in advance.
  • the MME identifier corresponding to the identifier of the UE of the data packet to be received is determined, and the first identifier is obtained, and the first identifier is determined.
  • the MME is an MME that matches the UE that is to receive the data packet, that is, the MME with the first identifier is the MME to which the UE is attached.
  • the first correspondence is the first correspondence between the SCEF receiving MME and/or the Home Subscriber Server (HSS).
  • HSS Home Subscriber Server
  • the MME identifier may be a unique number of the MME in the network, such as an Internet Protocol IP address of the MME. If the MME to which the UE is attached changes, the SCEF updates the identifier of the MME corresponding to the identifier of the UE as the MME after the change in the first correspondence.
  • Step 203 Send a link establishment request to the first network element, so that the first network element initiates, by the UE that is to receive the data packet, the link establishment of establishing a data link for transmitting the data packet. request.
  • the link establishment request initiated by the UE that pre-transmits a data packet to the server is a request for establishing a transmission link between the server and the UE.
  • the transmission link is a data plane transmission link established between the UE, the eNodeB, and the SGW, and the downlink data packet can be transmitted to the UE through the transmission link server.
  • the link establishment request is a paging message
  • the MME initiates a paging message to the eNodeB where the UE resides, which is actually performing paging on the UE. Process.
  • the method further includes: receiving, by the SCEF, a state of the UE that is to be received by the MME, and if the state of the UE is an Idle state, the SCEF is The MME sends the link setup request.
  • the server needs to send the downlink data packet to the UE in the Idle state, and the SCEF learns the identifier of the UE that can receive the data packet from the server, and finds the MME to which the UE is attached in the first correspondence relationship. And transmitting to the MME a link setup request capable of establishing a data link for transmitting the data packet, and transmitting the data packet from the server to the UE through the established data link.
  • the present embodiment performs paging from the signaling to the UE in the Idle state to allow paging.
  • the process of obtaining the identifier of the UE by using the SCEF and determining the MME matching the identifier in the foregoing solution, and sending the link establishment request to the MME may be regarded as a process of paging from the UE in the Idle state, to be transmitted.
  • the data packets need not be buffered in the SGW/PGW, which can greatly reduce the load of the PGW/SGW network element and reduce the transmission delay.
  • the first network element is taken as an example of the MME.
  • the paging procedure for UE1 is performed for the HSS to trigger the MME.
  • Step 301 The HSS and the server perform an open signing of the user paging capability
  • the HSS and the server agree on the type of UE that can face the UE from signaling, that is, which UE is eligible to perform the subsequent steps 304 to 314.
  • Step 302 Perform a user access authentication and authorization process.
  • the access authentication and authorization process mainly includes a process of initial attaching, legality authentication, and security authentication to the UE.
  • the UE may complete attachment to an MME, and the MME saves its own identity and attached thereto.
  • the identifier of the UE is obtained, and the first correspondence is obtained, and the first pair is saved in the HSS. Should be related.
  • the access authentication and authorization process refer to the related descriptions, which are not mentioned here.
  • Step 303 The HSS determines whether the UE1 has a user paging capability open function.
  • step 304 If yes, proceed to step 304;
  • Step 304 The HSS notifies the MME to perform a paging capability opening process to the SCEF.
  • Step 305 The MME reports the first correspondence to the SCEF.
  • Step 306 The MME reports the status of the UE to the SCEF.
  • the state of the UE may be the Idle state and the connected state; because the present scheme is a process of paging from the UE in the Idle state, the UE state reported by the MME to the SCEF is preferably in the Idle state.
  • Step 307 The server sends the identifier of the UE1, and the SCEF receives the identifier.
  • the server needs to send a downlink data packet to UE1, and first sends the identifier of UE1 to the SCEF.
  • the UE1 does not perform data transmission after the downlink data packet transmission is completed, it needs to be triggered to enter the Idle state.
  • the server sends the identifier of the UE1 to the SCEF, the UE1 needs to be instructed to enter the Idle. The time of the state, so that UE1 enters the Idle state when the time comes, so that the network resources occupied by UE1 can be freed for use by other terminals.
  • Step 308 In the first correspondence, the SCEF searches for the MME identifier corresponding to the identifier of the UE1, and obtains the first identifier.
  • Step 309 The SCEF sends a link establishment request to the MME having the first identifier.
  • Step 310 The MME sends a Paging message to the eNodeB where the UE1 resides.
  • the eNodeB sends a Paging message to the UE1 to trigger the UE1 to initiate a paging service request (Service Request) to the network side, and perform a data link establishment process to establish the UE1 and the network. Side connection.
  • Service Request paging service request
  • step 310 is a process for the MME to page the UE.
  • MME Mobility Management Entity
  • Step 311 The MME notifies that the SCEF data link has been established.
  • Step 312 The SCEF notifies the server that the data link has been established.
  • Step 313 The server transmits the data packet to the UE1 through the established data link.
  • the method further includes the step 314: the MME that sends the change to the MME sends the identity of the MME to the SCEF, and the SCEF updates the MME identifier corresponding to the identifier of the UE1 as the MME identity after the change in the first correspondence. .
  • the HSS triggers the MME to perform paging on the UE, obtains the identifier of the UE1 through the SCEF, determines an MME that matches the identifier, and sends a link establishment request to the MME to complete the transmission chain between the UE1 and the server.
  • the paging is performed on the UE in the Idle state, and the data packet to be transmitted does not need to be buffered in the SGW/PGW, which can greatly alleviate the load of the PGW/SGW network element and reduce the transmission delay.
  • the HSS performs a paging capability open procedure to the SCEF.
  • Step 401 The HSS and the server perform an open signing of the user paging capability
  • the HSS and the server agree on the type of UE that can face the UE from signaling, that is, which UE is eligible to perform the subsequent steps 404 to 412.
  • Step 402 Perform a user access authentication and authorization process.
  • the access authentication and authorization process mainly includes a process of initial attaching, legality authentication, and security authentication of the UE, in which the UE may complete attachment to a certain MME, and the MME saves its own identity and the UE attached thereto.
  • the identifier is obtained, and the first correspondence is obtained, and the first correspondence is saved in the HSS.
  • Step 403 The HSS determines whether the UE1 has a user paging capability open function.
  • step 404 If yes, proceed to step 404;
  • Step 404 The HSS reports the first correspondence to the SCEF.
  • Step 405 The server sends the identifier of the UE1, and the SCEF receives the identifier.
  • the server needs to send a downlink data packet to the UE1 in the Idle state, first of all, UE1
  • the ID is sent to SCEF.
  • the UE1 does not perform data transmission after the downlink data packet transmission is completed, it needs to be triggered to enter the Idle state.
  • the server sends the identifier of the UE1 to the SCEF, the UE1 needs to be instructed to enter the Idle. The time of the state, so that UE1 enters the Idle state when the time comes.
  • Step 406 In the first correspondence, the SCEF searches for the MME identifier corresponding to the identifier of the UE1, and obtains the first identifier.
  • Step 407 The SCEF sends a link establishment request to the MME having the first identifier.
  • Step 408 The MME sends a Paging message to the eNodeB where the UE1 is located, and the eNodeB sends a Paging message to the UE1 to trigger the UE1 to initiate a paging service request (Service Request) to the network side, perform a data link establishment process, and establish a UE1 and a network. Side connection.
  • Service Request paging service request
  • Step 409 The MME notifies that the SCEF data link has been established.
  • Step 410 The SCEF notifies the server that the data link has been established.
  • Step 411 The server transmits the data packet to the UE1 through the established data link.
  • the method further includes the step 412: the MME that changes the attachment sends the identity of the MME to the SCEF, and the SCEF updates the MME identifier corresponding to the identifier of the UE1 as the MME identity after the change in the first correspondence. .
  • the HSS performs a paging capability opening process to the SCEF, acquires the identifier of the UE1 through the SCEF, determines an MME that matches the identifier, and sends a link establishment request to the MME to complete a transmission link between the UE1 and the server.
  • the paging is performed on the UE in the Idle state, and the data packet to be transmitted does not need to be buffered in the SGW/PGW, which can greatly alleviate the load of the PGW/SGW network element and reduce the transmission delay.
  • the server triggers the MME to perform a paging procedure for UE1.
  • Step 501 The HSS and the server perform an open signing of the user paging capability
  • the HSS and the server agree on the type of UE that can face the UE from signaling, and also That is, which UE is eligible to perform the subsequent steps 506 to 511.
  • Step 502 Perform a user access authentication and authorization process.
  • the access authentication and authorization process mainly includes a process of initial attaching, legality authentication, and security authentication of the UE, in which the UE may complete attachment to a certain MME, and the MME saves its own identity and the UE attached thereto.
  • the identifier is obtained, and the first correspondence is obtained, and the first correspondence is saved in the HSS.
  • Step 503 The server sends the identifier of the UE1, and the SCEF receives the identifier.
  • Step 504 The SCEF sends the identifier of the UE1 to the HSS.
  • Step 505 The HSS determines whether the UE1 has a user paging capability open function.
  • Step 506 The HSS sends a link establishment request to the MME.
  • Step 507 The MME determines whether the UE1 is in the Idle state.
  • step 508 is performed
  • step 509 is performed.
  • Step 508 The MME sends a Paging message to the eNodeB where the UE1 is located, and the eNodeB sends a Paging message to the UE1 to trigger the UE1 to initiate a Service Request to the network side, perform a data link establishment process, and establish a connection between the UE1 and the network side.
  • Step 509 The MME notifies that the SCEF data link has been established.
  • Step 510 The SCEF notifies the server that the data link has been established.
  • Step 511 The server transmits the data packet to the UE1 through the established data link.
  • the method further includes the step 512: the MME that changes the attachment sends the identity of the MME to the SCEF, and the SCEF updates the MME identifier corresponding to the identifier of the UE1 as the MME identity after the change in the first correspondence. .
  • the MME when the MME receives the link establishment request sent by the HSS and determines that the UE1 is in the Idle state, the MME performs a process of paging the UE1 to complete the transmission between the UE1 and the server. The establishment of the transmission link and transmission of the data packet from the server to the UE1 through the transmission link. The paging is performed on the UE in the Idle state, and the data packet to be transmitted does not need to be buffered in the SGW/PGW, which can greatly alleviate the load of the PGW/SGW network element and reduce the transmission delay.
  • SCEF may be implemented by independent SCEF network elements, or may be implemented by being integrated into the SGW/PGW.
  • the method for establishing a user connection when the server that receives the third-party service triggers the paging UE, sends a link establishment request to the first network element attached to the UE according to the first correspondence relationship,
  • the paging of the UE is performed by the first network element, so that the UE triggers the service request process, and establishes a connection with the network side, so as to establish a downlink data channel, so that the server of the third-party service delivers service downlink data of the UE.
  • the service downlink data of the UE is stored in the server of the third-party service, and the network element temporary storage data is not needed, which reduces the processing load of the network element.
  • the paging of the signaling plane is provided, and the experience of the third-party service is optimized.
  • FIG. 6 it is a schematic flowchart of a method for establishing a user connection according to a second embodiment of the present invention.
  • the method for establishing a user connection may include:
  • Step 601 The policy and charging rule function network element PCRF obtains the network element identifier of the first network element of the mobility management entity to which the user equipment UE is currently attached.
  • the user ID of the UE that is contracted with the third-party service and the network element identifier of the first network element to which the UE is currently attached are obtained by the PCRF.
  • Step 602 The PCRF sends the network element identifier of the first network element to which the UE is currently attached to the capability open network element SCEF, so that the SCEF establishes and maintains the first correspondence between the user identifier of the UE and the first network element to which the UE is currently attached.
  • the identifier of the UE that is subscribed to the third-party service (for example, the user identifier of the UE) and the network element identifier of the first network element to which the UE is currently attached are obtained by using the PCRF, and the network element identifier is sent to the SCEF.
  • the SCEF establish and maintain (record) the user identity of the UE and the first network element Corresponding to the first network element that the UE currently attaches according to the first correspondence, and sending a link establishment request to the first network element, according to the link establishment request with the UE sent by the server of the third-party service.
  • the UE In order to page the UE through the first network element, the UE triggers the service request process, and establishes a connection with the network side.
  • the step of acquiring the network element identifier of the first network element to which the user equipment UE is currently attached by the policy and charging rule function network element PCRF includes:
  • the third-party service access authentication and authorization is performed on the UE, it is determined whether the third-party service has the paging optimization function enabled; if yes, the network element of the first network element to which the UE is currently attached is obtained from the packet data network gateway PGW/serving gateway SGW. logo.
  • the third party service capability is opened in the subscription data of the mobile internet service.
  • the paging optimization function is enabled for the third party service, and the PCRF determines that the third party service subscribed by the UE has opened the paging. Optimization function, which can obtain the current UE status from the PGW/SGW.
  • the network element identifier of the first network element that is attached to the first network element is not limited.
  • the embodiment does not limit the manner in which the PCRF obtains the network element identifier of the first network element that the UE currently attaches to the PGW/SGW.
  • the step of acquiring the network element identifier of the first network element to which the user equipment UE is currently attached may also include:
  • the PGW/SGW After acquiring the network element identifier of the first network element to which the UE is currently attached, the PGW/SGW is further subscribed to the first network element change event of the UE, and receives the first network element of the UE reported by the PGW/SGW. When the event is changed, the network element identifier of the first network element to which the UE is currently attached is re-acquired.
  • the PCRF can receive the first network element change event of the UE reported by the PGW/SGW when the UE switches the attached first network element by subscribing the first network element change event of the UE to the PGW/SGW, and acquire the UE at the same time.
  • the network element identifier of the first newly attached first network element, and sends the current UE to the SCEF.
  • the method further includes: sending, to the SCEF, information about a current access state of the UE,
  • the SCEF is enabled to receive and maintain the current access status of the UE, and the access status includes a connected state and an idle state.
  • the first network element is a mobility management network element.
  • the first network element is a mobility management entity MME.
  • the method for establishing a user connection obtains the network element identifier of the first network element that the UE currently attaches by using the PCRF, and sends the network element identifier to the SCEF, so that the SCEF establishes and maintains the user identifier of the UE.
  • the SCEF determines, according to the first correspondence, the first network element currently attached by the UE, to the first A network element sends a link setup request to page the UE through the first network element, so that the UE triggers the service request process, and establishes a connection with the network side, so that the server of the third-party service delivers the downlink data of the service of the UE.
  • the network element does not need to temporarily store data, which reduces the processing load of the network element; and at the same time, optimizes the experience of the third-party service by providing paging of the signaling plane.
  • FIG. 7 is a schematic flowchart of a method for establishing a user connection according to a first embodiment of the present invention.
  • the method for establishing a user connection may include:
  • Step 701 The first network element currently attached by the user equipment UE acquires an indication message for sending a registration message to the capability open network element SCEF.
  • the step of acquiring an indication message for sending a registration message to the capability open network element SCEF may include: receiving, by the policy and charging rule function network element PCRF, an indication message for sending a registration message to the SCEF.
  • the step of acquiring an indication message for sending a registration message to the capability open network element SCEF may include: downloading user context data of the network side by using the first network element attached to the UE, and sending the information to the SCEF according to the user context data.
  • An indication message for the registration message may be obtained by the PCRF.
  • the user context data in the first network element attached to the UE may be downloaded, and an indication message for sending a registration message to the SCEF may be obtained according to the user context data.
  • Step 702 The first network element sends a registration message to the SCEF according to the indication message, so that the SCEF records The first correspondence between the user identifier of the UE and the first network element.
  • the third-party service signed by the UE has opened the paging optimization function.
  • the third party service capability opening contract is added to the mobile internet service subscription data, and when a third party service is contracted, the paging optimization function is activated for the third party service.
  • the first network element is a mobility management network element.
  • the first network element may be a mobility management entity MME.
  • the first network element sends a registration message to the SCEF, so that the SCEF records the first correspondence between the user identifier of the UE and the first network element, and the link between the UE and the UE according to the third-party service.
  • the SCEF determines, according to the first correspondence, the first network element to which the UE is currently attached, and sends a link establishment request to the first network element to page the UE by using the first network element, so that the UE triggers the service request process.
  • the method for establishing a user connection provided by the embodiment of the present invention sends a registration message to the SCEF by using the first network element, so that the SCEF records the first correspondence between the user identifier of the UE and the first network element, and according to the third party.
  • the UE is configured to enable the UE to trigger the service request process, and establish a connection with the network side to implement the third-party service of the server to deliver the downlink data of the service to the UE, so that the network element does not need to temporarily store data, thereby reducing the network element. Processing the load; at the same time, optimizing the experience of the third-party service by providing paging of the signaling plane.
  • FIG. 8 is a schematic structural diagram of a capability open network element device according to a fourth embodiment of the present invention.
  • the capability open network element device 800 includes:
  • the obtaining and recording module 810 is configured to acquire and record a first correspondence between the user identifier of the user equipment UE and the first network element to which the UE is currently attached;
  • the connection module 820 is configured to: according to the link establishment request sent by the server that receives the third-party service subscribed by the UE, the first corresponding record according to the acquisition and recording module 410 And determining a first network element currently attached by the UE, and sending a link establishment request to the first network element, to page the UE by using the first network element.
  • the acquiring and recording module includes: a first receiving unit, configured to receive a network element identifier of a first network element currently attached by the UE that is sent by the policy and charging rule function unit PCRF; and a first establishing unit, configured to A network element identifier received by the receiving unit establishes a first correspondence between the user identifier of the UE and the first network element to which the UE is currently attached.
  • the acquiring and recording module includes: a second receiving unit, configured to receive a registration message sent by the first network element that is currently attached by the UE, where the registration message includes the user identifier of the UE and the network element identifier of the first network element; And a establishing unit, configured to establish, according to the registration message received by the second receiving unit, a first correspondence between the user identifier of the UE and the first network element to which the UE is currently attached.
  • the capability open network element device further includes: a receiving and maintaining module, configured to receive information about a current access state of the UE sent by the policy and charging rule function unit PCRF, and maintain the current access state of the UE, and connect
  • the incoming state includes a connected state and an idle state, and when the access state is an idle state, a link establishment request is sent to the first network element.
  • the third-party service signed by the UE has opened the paging optimization function.
  • the first network element is a mobility management network element.
  • the first network element is a mobility management entity MME.
  • the capability open network element device of the embodiment of the present invention sends a link establishment request to the first network element attached to the UE according to the first correspondence relationship when the server that receives the third-party service triggers the paging UE, Paging the UE by the first network element, causing the UE to trigger the service request process, establishing a connection with the network side, and establishing a downlink data channel, so that the server of the third-party service delivers the service downlink data of the UE.
  • the service downlink data of the UE is stored in the server of the third-party service, and the network element temporary storage data is not needed, which reduces the processing load of the network element.
  • the paging of the signaling plane is provided, and the experience of the third-party service is optimized.
  • the device includes:
  • the first obtaining unit 830 is configured to acquire an identifier of the terminal UE that is to receive the data packet.
  • the first determining unit is configured to determine, according to the identifier of the UE, a first network element 840 that matches the UE of the data packet to be received.
  • a first acquiring unit configured to acquire a first correspondence, where the first correspondence records a correspondence between an identifier of the UE and an identifier of the first network element to which the UE is attached;
  • the first receiving unit is configured to receive the first correspondence that is reported by the first network element and/or the user home server HSS.
  • the first receiving unit is configured to receive, by the server, an identifier of the UE that is to receive the data packet, and correspondingly, the first network element sends the link establishment request to the UE that is to receive the data packet.
  • An acquiring and recording module configured to receive a state of the UE to be received by the first network element, and send the chain to the first network element if the state of the UE is an idle state Road establishment request.
  • a receiving and maintaining module configured to: if the first network element attached to the UE to be received by the UE is changed, update the first network element corresponding to the UE that is to receive the data packet in the first correspondence relationship
  • the identifier is the identifier of the first network element after the change is attached.
  • the first network element is a mobility management entity MME or a software defined network controller SDN controller.
  • the SCEF of the embodiment of the present invention is similar to the foregoing data transmission method. Therefore, the implementation process and implementation principles of the SCEF can be described in the implementation process and the implementation principle of the foregoing method. .
  • FIG. 9 is a schematic structural diagram of a PCRF device of a policy and charging rule function network element according to a fifth embodiment of the present invention.
  • the policy and charging rule function network element PCRF device includes:
  • the obtaining module 910 is configured to: obtain, by the UE and the UE, the network element identifier of the first network element currently attached by the user equipment UE;
  • the first sending module 920 is configured to send, by the PCRF, the network element identifier of the first network element that is currently attached by the UE acquired by the acquiring module 510, and the SCEF establishes and maintains the user identifier of the UE and the current attached to the UE.
  • the first correspondence of a network element is configured to send, by the PCRF, the network element identifier of the first network element that is currently attached by the UE acquired by the acquiring module 510, and the SCEF establishes and maintains the user identifier of the UE and the current attached to the UE.
  • the obtaining module 910 includes: a determining unit, configured to determine whether a third-party service has enabled a paging optimization function when performing third-party service access authentication and authorization on the UE; and the obtaining unit is configured to determine a judgment result of the unit If yes, the network element identifier of the first network element to which the UE is currently attached is obtained from the packet data network gateway PGW/serving gateway SGW.
  • the obtaining module 910 further includes:
  • a subscription and receiving unit configured to: after the acquiring unit acquires the network element identifier of the first network element that the UE is currently attached to the PGW/SGW, further subscribe the first network element change event of the UE to the PGW/SGW, and receive the PGW/ When the first network element of the UE that is reported by the SGW changes the event, the network element identifier of the first network element to which the UE is currently attached is re-acquired.
  • the PCRF device further includes: a second sending module, configured to send information about a current access state of the UE to the SCEF, so that the SCEF receives and maintains a current access state of the UE, where the access state includes a connected state and an idle state.
  • the first network element is a mobility management network element.
  • the first network element is a mobility management entity MME.
  • the PCRF device of the policy and charging rule function network element obtaineds the network element identifier of the first network element currently attached by the UE by using the PCRF, and sends the network element identifier to the SCEF, so that the SCEF records the UE.
  • FIG. 10 is a schematic structural diagram of a first network element device according to a sixth embodiment of the present invention.
  • the first network element device 1000 may include:
  • the obtaining module 1010 is configured to acquire, by the first network element that the user equipment UE is currently attached, an indication message that sends a registration message to the capability open network element SCEF.
  • the sending module 1020 is configured to send, by the first network element, the registration message to the SCEF according to the indication message acquired by the obtaining module 610, where the registration message includes the user identifier of the UE and the network element identifier of the first network element, so that the SCEF records the user identifier of the UE.
  • the obtaining module 1010 includes: a first acquiring unit, configured to receive an indication message that is sent by the policy and charging rule function network element PCRF to send a registration message to the SCEF.
  • the obtaining module 1010 includes: a second acquiring unit, configured to download user context data of the network side by using the first network element attached to the UE, and obtain an indication message for sending a registration message to the SCEF according to the user context data.
  • the third-party service signed by the UE has opened the paging optimization function.
  • the first network element is a mobility management network element.
  • the first network element is a mobility management entity MME.
  • the first network element device provided by the embodiment of the present invention sends a registration message to the SCEF by using the first network element, so that the SCEF records the first correspondence between the user identifier of the UE and the first network element, and according to the third party.
  • the UE is configured to enable the UE to trigger the service request process, and establish a connection with the network side to implement the third-party service of the server to deliver the downlink data of the service to the UE, so that the network element does not need to temporarily store data, thereby reducing the network element. Processing the load; at the same time, optimizing the experience of the third-party service by providing paging of the signaling plane.
  • the embodiments of the capability open network element device, the policy and charging rule function network element device, and the mobile management entity and the user connection establishment method are the same concept, and the specific implementation process is described in the method embodiment. , no longer repeat them here.
  • the specific implementation example 1 registers a paging capability with a SCEF through a PCRF, thereby implementing user connection establishment.
  • the specific steps are as follows:
  • the contract data increases the third-party user capacity to open the contract; here, according to the contract data, the paging optimization of the business of a certain industry user (third-party user) is opened.
  • the PCRF determines that the user has opened the paging capability open function
  • the PGW/SGW reports the MME address currently attached by the UE, and when the MME switches, notifies the PCRF of the newly attached MME address of the UE;
  • the PCRF registers the MME address attached to the user to the SCEF; here, the PCRF registers the first correspondence between the MME identity and the user identifier to the SCEF.
  • the server of the third-party service instructs the SCEF to establish a connection of the user; at this time, the UE is in the Idle state, and the PCRF has reported the connection state (Idle state) of the user to the SCEF, and the SCEF records the connection state of the UE.
  • the SCEF sends a request for establishing a user connection to the MME.
  • the MME initiates a paging process to the registered base station (eNodeB);
  • the eNodeB initiates a Paging process to the UE
  • the UE initiates a connection request process and requests to establish a connection.
  • the attached MME notifies the SCEF user that the connection is established
  • the SCEF notifies the server user of the third-party service that the connection is established. At this time, the downlink data channel is established, and the server of the third-party service delivers the service downlink data to the UE.
  • the PCRF registers the newly attached MME address with the SCEF.
  • the foregoing SCEF logic may be implemented by a separate network element or may be implemented based on HSS/PGW.
  • the server of the third-party service may send an indication to the SCEF that the UE enters the Idle state for a predetermined time, so that when the UE standby duration meets the predetermined time, the network data connection with the UE is cut off to enable the UE to enter the Idle.
  • the SCEF notifies the UE of the currently attached MME according to the first correspondence, or notifies the UE via the PCRF.
  • the specific implementation example 2 triggers the MME to register a paging capability by using a PCRF, thereby implementing user connection establishment.
  • the specific steps are as follows:
  • the contract data increases the third-party user capacity to open the contract; here, according to the contract data, the paging optimization of the business of a certain industry user (third-party user) is opened.
  • the PCRF determines that the user has opened the paging capability open function
  • the PCRF instructs the MME to register the MME identity attached to the UE to the SCEF.
  • the MME registers the MME identity attached to the UE to the SCEF.
  • the server of the third-party service instructs the SCEF to establish a connection of the user; at this time, the UE is in an idle state, and the PCRF has reported the connection state (Idle state) of the user to the SCEF, and the SCEF records that the UE is in the Idle state.
  • the MME initiates a Paging process to the registered eNodeB.
  • the eNodeB initiates a Paging process to the UE
  • the UE initiates a connection request procedure and requests to establish a connection
  • the user is notified of the connection establishment; at this time, the downlink data channel is established, and the server of the third-party service delivers service downlink data to the UE.
  • the newly attached MME of the UE acquires an indication message for registering with the SCEF, which may be acquired by the PCRF or obtained by the old MME to download the user context, and the new MME registers with the SCEF according to the indication message.
  • the new and old MMEs are not distinguished, that is, the MME in the figure indicates the MME currently attached by the UE and the MME newly attached after the UE switches the MME.
  • the foregoing SCEF logic may be implemented by a separate network element or may be implemented based on HSS/PGW.
  • the server of the third-party service may send an indication to the SCEF that the UE enters the Idle state for a predetermined time, so that when the UE standby duration meets the predetermined time, the network data connection with the UE is cut off to enable the UE to enter the Idle.
  • the SCEF notifies the UE of the currently attached MME according to the first correspondence, or notifies the UE via the PCRF.
  • the specific implementation example 3 triggers the MME registration paging capability to be opened by a third-party service, thereby implementing user connection establishment, and the specific steps are as follows:
  • the contract data increases the third-party user capacity to open the contract; here, according to the contract data, the paging optimization of the business of a certain industry user (third-party user) is opened.
  • the third party indicates to establish a user connection
  • the PCRF determines that the user has opened the paging capability
  • the PCRF indicates that the MME registers the MME identity attached to the user with the SCEF; 5b, the MME registers the MME identity attached to the UE with the SCEF;
  • the server of the third-party service instructs the SCEF to establish a connection of the user; at this time, the UE is in Idle.
  • connection status (Idle state) of the user to the SCEF
  • SCEF records that the UE is in the Idle state.
  • the SCEF sends a request for establishing a user connection to the MME.
  • the MME initiates a Paging process to the registered eNodeB.
  • the eNodeB initiates a Paging process to the UE
  • the SCEF notifies the user that the connection is established.
  • the downlink data channel is established, and the server of the third-party service delivers service downlink data to the UE.
  • the newly attached MME of the UE acquires an indication message for registering with the SCEF, which may be obtained by the PCRF or obtained by the old MME to download the user context, and the new MME registers with the SCEF according to the indication message.
  • the old and new MMEs are not distinguished, that is, the MME in the figure indicates the MME currently attached by the UE and the MME newly attached after the UE switches the MME.
  • the foregoing SCEF logic may be implemented by a separate network element or may be implemented based on the HSS/PGW; if the SCEF logic is implemented on the PGW/SGW, the connection between the server of the third-party service and the PCRF may be directly established. .
  • the server of the third-party service may send an indication to the SCEF that the UE enters the Idle state for a predetermined time, so that when the UE standby duration meets the predetermined time, the network data connection with the UE is cut off to enable the UE to enter the Idle.
  • the SCEF notifies the UE of the currently attached MME according to the first correspondence, or notifies the UE via the PCRF.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the present invention is directed to a method, apparatus (system), and computer program product according to an embodiment of the present invention.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明公开了一种用户连接的建立方法及装置，其中方法包括：获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系；若确定需要建立与所述UE之间的链路，则根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求。

Description

一种用户连接的建立方法及装置 技术领域
本发明涉及移动互联网领域，特别是指一种用户连接的建立方法及装置。
背景技术
用户设备(UE)没有任何数据下载或者上传时，UE处于空闲(Idle)态，Idle态有利于UE节电，同时也避免UE移动时，向网络频繁发起切换流程，增加网络侧的信令处理负荷。
目前，业务寻呼能力通常可以从数据面触发移动管理实体(MME)寻呼用户、或分组数据网网关(PGW)/服务网关(SGW)触发MME寻呼用户，但是从数据面触发MME寻呼用户时，数据面数据流转发较信令优先级低，且受网关拥塞影响较大，数据的延迟大，用户业务感受差；而PGW/SGW触发MME寻呼用户的流程如图1所示，包括：1、S-GW接收到发给处于Idle状态的UE下行数据包，S-GW缓存下行数据包；2、S-GW发送下行数据通知消息给MME；如果S-GW收到该UE另外的下行数据包时，S-GW缓存这些数据包，但不再发送新的下行数据通知消息；3、MME发送寻呼消息给每一个UE注册的跟踪区的基站(eNodeB)；4、eNodeBs寻呼UE；5、UE触发业务请求过程，建立和网络侧的连接，下行数据通道建立。
从上述过程中可以看出，PGW/SGW触发MME寻呼时，PGW/SGW需暂存转发数据，网元处理负荷重。而对于小数据业务造成的信令风暴，上述问题尤其严重，由此甚至会导致网络无法收费和盈利。
发明内容
本发明要解决的技术问题是提供一种用户连接的建立方法及装置，以解决Idle态下从数据面触发MME寻呼用户受网关拥塞影响较大，数据的延迟大， 用户业务感受差；或从PGW/SGW触发MME寻呼用户时，PGW/SGW需暂存转发数据，网元处理负荷重，以及由此导致的网络无法收费等问题。
第一方面，本发明的实施例提供了一种用户连接的建立方法，所述方法包括：
获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系；
若确定需要建立与所述UE之间的链路，则根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求。
其中，所述确定需要建立与所述UE之间的链路，包括：
若接收到第三方业务的服务器发送的建立与所述UE之间的链路建立请求，则确定需要建立与UE之间的链路。
其中，所述获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系，包括：
接收策略与计费规则功能网元PCRF发送的所述UE当前附着的第一网元的网元标识；
根据所述网元标识，建立所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
其中，所述获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系，包括：
接收所述UE当前附着的第一网元发送的注册消息，所述注册消息包括所述UE的标识和所述第一网元的网元标识；
根据所述注册消息，建立所述UE的标识和所述UE当前所附着的第一网元的第一对应关系。
其中，在根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求，以通过所述第一网元寻呼所述UE之前，所述方法还包括：
接收策略与计费规则功能网元PCRF发送的所述UE当前的接入状态的信息，并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态，并在所述接入状态为空闲态时，向所述第一网元发送链路建立请求。
其中，所述确定需要建立与所述UE之间的链路之前，所述方法还包括：
从待接收数据包中获取UE的标识；
依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元。
其中，所述依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元，包括：
在所获取的第一对应关系中，确定与所述待接收数据包的UE的标识相对应的第一网元标识，得到第一标识；
确定具有第一标识的第一网元为与所述待接收数据包的UE相匹配的第一网元。
其中，所述获取第一对应关系，包括：
接收所述第一网元和/或用户归属服务器HSS上报的所述第一对应关系。
其中，所述从待接收数据包中获取UE的标识，包括：
接收服务器发送的所述待接收数据包的UE的标识；
相应的，所述第一网元向所述待接收数据包的UE发起的所述链路建立请求为建立所述服务器与所述待接收数据包的UE之间的传输链路的请求。
其中，在向所述第一网元发送链路建立请求之前，所述方法还包括：
接收所述第一网元上报的所述待接收数据包的UE的状态；
如果所述UE的状态为空闲态Idle态，向所述第一网元发送所述链路建立请求。
其中，所述方法还包括：
如果所述待接收数据包的UE所附着的第一网元发生变化，则在第一对应关系中更新与所述待接收数据包的UE对应的第一网元的标识为附着变化后的第一网元的标识。
其中，所述第一网元为移动管理实体MME或软件定义网络控制器SDN controller。
本发明实施例还提供一种用户连接的建立方法，所述方法包括：
策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识；
所述PCRF向能力开放网元SCEF发送所述UE当前附着的第一网元的网元标识，使所述SCEF建立并维护所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
其中，所述策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识，包括：
在对所述UE进行第三方业务接入认证授权时，判断所述第三方业务是否已开通寻呼优化功能；
若是，则向分组数据网网关PGW/服务网关SGW获取所述UE当前附着的第一网元的网元标识。
其中，所述策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识，还包括：
在向所述PGW/SGW获取所述UE当前附着的第一网元的网元标识之后，向所述PGW/SGW订阅所述UE的第一网元改变事件，并在接收到所述PGW/SGW上报的所述UE的第一网元改变事件时，重新获取所述UE当前附着的第一网元的网元标识。
其中，所述方法还包括：
向所述SCEF发送所述UE当前的接入状态的信息，以使所述SCEF接收并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态。
本发明实施例还提供一种用户连接的建立方法，所述方法包括：
用户设备UE当前附着的第一网元，获取向能力开放网元SCEF发送注册消息的指示消息；
所述第一网元根据所述指示消息向所述SCEF发送注册消息，所述注册消息包括有所述UE的用户标识和所述第一网元的网元标识，使所述SCEF记录所述UE的用户标识和所述第一网元的第一对应关系。
其中，所述获取向能力开放网元SCEF发送注册消息的指示消息，包括：
接收策略与计费规则功能网元PCRF发送的向所述SCEF发送注册消息的指示消息。
其中，所述获取向能力开放网元SCEF发送注册消息的指示消息，包括：
通过所述UE之前附着的第一网元下载网络侧的用户上下文数据，根据所述用户上下文数据获取所述向所述SCEF发送注册消息的指示消息。
本发明实施例还提供一种能力开放网元SCEF装置，包括：
获取及记录模块，用于获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系；
连接模块，用于若确定需要建立与所述UE之间的链路，则根据所述获取及记录模块记录的所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求。
其中，连接模块，用于若接收到第三方业务的服务器发送的建立与所述UE之间的链路建立请求，则确定需要建立与UE之间的链路。
其中，所述获取及记录模块包括：
第一接收单元，用于接收策略与计费规则功能单元PCRF发送的所述UE当前附着的第一网元的网元标识；
第一建立单元，用于根据所述第一接收单元接收的所述网元标识，建立所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
其中，所述获取及记录模块包括：
第二接收单元，用于接收所述UE当前附着的第一网元发送的注册消息，所述注册消息包括所述UE的用户标识和所述第一网元的网元标识；
第二建立单元，用于根据所述第二接收单元接收的所述注册消息，建立所 述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
其中，还包括：
接收及维护模块，用于接收策略与计费规则功能单元PCRF发送的所述UE当前的接入状态的信息，并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态，并在所述接入状态为空闲态时，向所述第一网元发送链路建立请求。
其中，还包括：
第一获取单元，用于从待接收数据包中获取UE的标识；
第一确定单元，用于依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元。
其中，所述第一确定单元，用于在所获取的第一对应关系中，确定与所述待接收数据包的UE的标识相对应的第一网元标识，得到第一标识；
确定具有第一标识的第一网元为与所述待接收数据包的UE相匹配的第一网元。
其中，所述第一接收单元，用于接收所述第一网元和/或用户归属服务器HSS上报的所述第一对应关系。
其中，所述第一接收单元，用于接收服务器发送的所述待接收数据包的UE的标识；相应的，所述第一网元向所述待接收数据包的UE发起的所述链路建立请求为建立所述服务器与所述待接收数据包的UE之间的传输链路的请求。
其中，获取及记录模块，用于接收所述第一网元上报的所述待接收数据包的UE的状态；如果所述UE的状态为空闲态Idle态，向所述第一网元发送所述链路建立请求。
其中，还包括：
接收及维护模块，用于如果所述待接收数据包的UE所附着的第一网元发生变化，则在第一对应关系中更新与所述待接收数据包的UE对应的第一网元的标识为附着变化后的第一网元的标识。
其中，所述第一网元为移动管理实体MME或软件定义网络控制器SDN controller。
本发明实施例还提供一种策略与计费规则功能网元PCRF装置，包括：
获取模块，用于策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识；
第一发送模块，用于所述PCRF向能力开放网元SCEF发送所述获取模块获取的所述UE当前附着的第一网元的网元标识，使所述SCEF建立并维护所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
其中，所述获取模块包括：判断单元，用于在对所述UE进行第三方业务接入认证授权时，判断所述第三方业务是否已开通寻呼优化功能；获取单元，用于所述判断单元的判断结果若为是，则向分组数据网网关PGW/服务网关SGW获取所述UE当前附着的第一网元的网元标识。
其中，所述获取模块还包括：
订阅及接收单元，用于在获取单元向所述PGW/SGW获取所述UE当前附着的第一网元的网元标识之后，进一步向所述PGW/SGW订阅所述UE的第一网元改变事件，并在接收到所述PGW/SGW上报的所述UE的第一网元改变事件时，重新获取所述UE当前附着的第一网元的网元标识。
其中，还包括：
第二发送模块，用于向所述SCEF发送所述UE当前的接入状态的信息，以使所述SCEF接收并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态。
本发明实施例还提供一种第一网元装置，包括：
获取模块，用于用户设备UE当前附着的第一网元，获取向能力开放网元SCEF发送注册消息的指示消息；
发送模块，用于所述第一网元根据所述获取模块获取的所述指示消息向所述SCEF发送注册消息，所述注册消息包括有所述UE的用户标识和所述第一 网元的网元标识，使所述SCEF记录所述UE的用户标识和所述第一网元的第一对应关系。
其中，所述获取模块包括：
第一获取单元，用于接收策略与计费规则功能网元PCRF发送的向所述SCEF发送注册消息的指示消息。
其中，所述获取模块包括：
第二获取单元，用于通过所述UE之前附着的第一网元下载网络侧的用户上下文数据，根据所述用户上下文数据获取所述向所述SCEF发送注册消息的指示消息。
本发明实施例的上述技术方案至少包括以下有益效果：通过PCRF获取UE当前附着的第一网元的网元标识，并向SCEF发送UE当前附着的第一网元的网元标识，或者由UE当前附着的第一网元获取指示消息后根据指示消息向SCEF发送注册消息，使SCEF获取并记录UE的用户标识和第一网元的第一对应关系；在SCEF接收到第三方业务的服务器发送的建立与UE之间的链路建立请求时，SCEF根据第一对应关系确定UE当前附着的第一网元，并向第一网元发送链路建立请求，以通过第一网元寻呼UE。这样，通过本发明的用户连接的建立方法提供信令面的寻呼机制，减少了用户寻呼延迟，减轻了网关负荷，优化了第三方业务的体验，同时也实现了信令层面的收费。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对本发明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发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1表示现有技术中PGW/SGW触发MME寻呼用户的流程示意图；
图2-1表示本发明第一实施例提供的用户连接的建立方法的流程示意图1；
图2-2表示本发明第一实施例提供的用户连接的建立方法的流程示意图2；
图2-3表示本发明第一实施例提供的用户连接的建立方法的流程示意图3；
图3表示本发明第一实施例提供的场景示意图1；
图4表示本发明第一实施例提供的场景示意图2；
图5表示本发明第一实施例提供的场景示意图3；
图6表示本发明第二实施例提供的用户连接的建立方法的流程示意图；
图7表示本发明第三实施例提供的用户连接的建立方法的流程示意图；
图8表示本发明第四实施例提供的能力开放网元装置的结构示意图；
图9表示本发明第五实施例提供的策略与计费规则功能网元PCRF装置的结构示意图；
图10表示本发明第六实施例提供的第一网元装置的结构示意图；
图11表示本发明实施例用户连接的建立方法的示例一；
图12表示本发明实施例用户连接的建立方法的示例二；
图13表示本发明实施例用户连接的建立方法的示例三。
具体实施方式
为使本发明要解决的技术问题、技术方案和优点更加清楚，下面将结合附图及具体实施例进行详细描述。
第一实施例、
请参见图2-1，本实施例针对用户连接的建立方法提供的一种流程示意图：
步骤10：获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系；
步骤20:若确定需要建立与所述UE之间的链路，则根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求。
本实施例具体的结合图2-2进行详细说明：图中示出了本发明第一实施例提供的用户连接的建立方法的流程示意图，该用户连接的建立方法可以包括：
步骤101，获取并记录用户设备UE的用户标识和UE当前所附着的第一网元的第一对应关系。
这里，获取并记录(维护)与该第三方业务签约的UE的用户标识和该UE当前附着的第一网元之间的第一对应关系。
步骤102，若接收到第三方业务的服务器发送的建立与UE之间的链路建立请求，则根据第一对应关系，确定UE当前附着的第一网元，并向第一网元发送链路建立请求，以通过第一网元寻呼UE。
这里，第三方业务接收有该UE的业务下行数据时，发送建立与UE之间的链路建立请求，该业务下行数据存储在该第三方业务的服务器上；移动互联网侧接收到该链路建立请求后，根据上述第一对应关系确定UE当前附着的第一网元，向该第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接，从而建立下行数据通道，使该第三方业务的服务器下发该UE的业务下行数据。
需要说明的是，本发明的第一实施例提供的用户连接的建立方法可以由单独的网元实现，也可以基于归属用户服务器(HSS)/PGW实现；这里，通过移动互联网侧的能力开放网元SCEF执行实现该第一实施例提供的用户连接的建立方法。
其中，作为本发明第一实施例的一种可选的实现方式中，步骤101，获取并记录用户设备UE的用户标识和UE当前所附着的第一网元的第一对应关系的步骤可以包括以下方面：接收策略与计费规则功能网元PCRF发送的UE当前附着的第一网元的网元标识；根据网元标识，建立UE的用户标识和UE当前所附着的第一网元的第一对应关系。
这里，通过PCRF获取到UE和该UE当前附着的第一网元的网元标识并发送给SCEF，SCEF接收并建立该UE的用户标识和该第一网元的网元标识之间的第一对应关系。
其中，作为本发明第一实施例的另一种可选的实现方式中，步骤101，获 取并记录用户设备UE的用户标识和UE当前所附着的第一网元的第一对应关系的步骤包括：
接收UE当前附着的第一网元发送的注册消息，该注册消息包括UE的用户标识和该第一网元的网元标识；根据该注册消息，建立UE的用户标识和UE当前所附着的第一网元的第一对应关系。
这里，通过UE当前附着的第一网元向SCEF发送注册消息，SCEF接收该注册消息并根据该注册消息建立UE的用户标识和UE当前所附着的第一网元的第一对应关系。
其中，作为本发明第一实施例的又一种可选的实现方式，在根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求，以通过所述第一网元寻呼所述UE之前，上述方法还包括：
接收策略与计费规则功能网元PCRF发送的UE当前的接入状态的信息，并维护UE当前的接入状态，接入状态包括连接态和空闲态，并在接入状态为空闲态时，向第一网元发送链路建立请求。
其中，作为本发明第一实施例的又一种可选的实现方式，所述UE签约的第三方业务已开通寻呼优化功能。这里，在移动互联网业务签约数据中增加第三方业务能力开放签约，当某一第三方业务签约后，为该第三方业务开通寻呼优化功能。其中，第一网元为移动性管理网元。优选的，该第一网元可以为移动管理实体(MME)。
结合图2-3提供另一种处理场景，本发明提供的数据传输方法的实施例应用于SCEF中。所述方法包括：
步骤201：获取待接收数据包的终端UE的标识；
这里，服务器需要向处于Idle状态的UE发送下行数据包，首先发送该UE的标识至SCEF，SCEF接收该UE的标识，所述UE的标识可以为UE的国际移动用户识别码(IMSI，International Mobile Subscriber Identification Number)、临时识别码(TMSI，Temporary Mobile Subscriber Identity)，也可以为该UE所 插的客户识别模块(SIM，Subscriber Identity Module)的SIM号。
步骤202：依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元；
这里，所述第一网元为具有移动性管理功能的网元，可以为MME，也可以为软件定义网络控制器(SDN controller)。以第一网元为MME为例，SCEF获取第一对应关系，所述第一对应关系记录有UE的标识与UE所附着的MME的标识之间的对应关系，SCEF在接收到服务器预向某个UE发送数据包的UE的标识后，在所获取的第一对应关系中，确定与所述待接收数据包的UE的标识相对应的MME标识，得到第一标识，确定具有第一标识的MME为与所述待接收数据包的UE相匹配的MME，即具有第一标识的MME就是该UE所附着的MME。该第一对应关系是SCEF接收MME和/或用户归属服务器(HSS，Home Subscriber Server)上报的第一对应关系。进一步的，在UE、eNodeB及MME完成UE的接入认证授权流程之后，UE确定了其应该附着的MME，UE所附着的MME保存自身标识与附着在其上的UE的标识，形成第一对应关系，同时，HSS也记录有该第一对应关系。其中，MME标识可以是MME在网络中的唯一编号如MME的网际协议IP地址。如果该UE所附着的MME发生变化，SCEF在第一对应关系中更新与该UE的标识对应的MME标识为附着变化后的MME的标识。
步骤203：向所述第一网元发送链路建立请求，以使所述第一网元向所述待接收数据包的UE发起建立传输所述数据包的数据链路的所述链路建立请求。
这里，所述MME向服务器预发送数据包的UE发起的所述链路建立请求为建立所述服务器与所述UE之间的传输链路的请求。该传输链路是建立在UE、eNodeB、SGW之间的数据面传输链路，通过该传输链路服务器可将下行数据包传输至UE。本领域人员应该而知，所述链路建立请求为Paging消息，MME向UE所驻留的eNodeB发起Paging消息实际上就是执行对该UE进行寻呼的 流程。
在向所述MME发送链路建立请求之前，所述方法还包括：SCEF接收所述MME上报的所述待接收数据包的UE的状态；如果所述UE的状态为Idle态，SCEF向所述MME发送所述链路建立请求。
本发明实施例中，服务器需要向处于Idle状态的UE发送下行数据包，SCEF从服务器获知能够接收这一数据包的UE的标识，并在第一对应关系中，查找到该UE所附着的MME，并向这一MME发送能够建立传输该数据包的数据链路的链路建立请求，并通过所建立的数据链路将数据包从服务器传输至UE。与现有技术中服务器直接将数据包传输至SGW/PGW缓存、从数据面触发MME对UE进行寻呼的方法相比，本实施例从信令面对处于Idle态的UE进行寻呼以让其建立起数据包的传输链路，在该传输链路建立之后通过该传输链路将数据包从服务器传输至UE。前述方案中通过SCEF获取UE的标识并确定与该标识相匹配的MME，并向该MME发送链接建立请求的过程可视为从信令面对处于Idle态的UE进行寻呼的过程，待传输的数据包无需在SGW/PGW中缓存，可大大缓解PGW/SGW网元的负荷、以及减少传输时延。
下面结合图3～图5对基于待发送数据包触发建立链路的处理的场景，做进一步的说明。在图3～图5中，以第一网元为MME为例进行的说明。
在图3中，为HSS触发MME执行对UE1的寻呼过程。
具体的，
步骤301：HSS和服务器进行用户寻呼能力开放签约；
这里，HSS和服务器约定可以从信令面对UE进行寻呼的UE的类型，也即哪种UE有资格执行后续的步骤304～步骤314。
步骤302：执行用户接入认证授权流程；
这里，接入认证授权流程主要包括对UE的初始附着、合法性认证、安全性认证等过程，在该过程中UE可完成对某个MME的附着，该MME保存自身标识与附着在其上的UE的标识，得到第一对应关系，HSS中保存该第一对 应关系。接入认证授权流程具体请参见现有相关说明，此处不赘述。
步骤303：HSS判断UE1是否具有用户寻呼能力开放功能；
如果有，继续执行步骤304；
否则，结束本流程；
步骤304：HSS通知MME向SCEF执行寻呼能力开放过程；
步骤305：MME向SCEF上报第一对应关系；
步骤306：MME向SCEF上报UE的状态；
这里，UE的状态可以为Idle态和连接态；因为本方案是从信令面对处于Idle态的UE进行寻呼的过程，所以MME向SCEF上报的UE状态优选为Idle态。
步骤307：服务器发送UE1的标识，SCEF接收该标识；
这里，服务器需要向UE1发送下行数据包，首先将UE1的标识发送至SCEF。优选的，考虑到网络资源的有限性，在该下行数据包传输完成之后如果UE1不再进行数据的传输，需要触发其进入Idle态，服务器发送UE1的标识至SCEF时，还需要指示UE1进入Idle态的时间，以使得UE1在该时间到来时进入Idle态，这样UE1之前占用的网络资源便可空闲出来以供其它终端使用。
步骤308：在第一对应关系中，SCEF查找与UE1的标识相对应的MME标识，得到第一标识；
步骤309：SCEF向具有第一标识的MME发送链路建立请求；
步骤310：MME发送Paging消息给UE1所驻留的eNodeB，eNodeB向该UE1发送Paging消息，以触发UE1向网络侧发起寻呼业务请求(Service Request)，执行数据链路建立流程，建立UE1和网络侧的连接。
这里，步骤310为MME寻呼UE的过程，具体描述请参见现有相关说明，此处不赘述。
步骤311：MME通知SCEF数据链路已建立；
步骤312：SCEF通知服务器数据链路已建立；
步骤313：服务器通过所建立起的数据链路传输数据包至UE1。
如果UE1所驻留的MME发生变化，还包括步骤314：附着发生变化后的MME发送自身标识至SCEF，SCEF在第一对应关系中更新与UE1的标识对应的MME标识为附着变化后的MME标识。
前述方案中，HSS触发MME对UE进行寻呼的过程，通过SCEF获取UE1的标识并确定与该标识相匹配的MME，并向该MME发送链接建立请求，以完成对UE1和服务器之间传输链路的建立，并通过该传输链路将数据包从服务器传输至UE1。实现从信令面对处于Idle态的UE进行寻呼，待传输的数据包无需在SGW/PGW中缓存，可大大缓解PGW/SGW网元的负荷、以及减少传输时延。
在图4中，HSS向SCEF执行寻呼能力开放过程。
具体的，
步骤401：HSS和服务器进行用户寻呼能力开放签约；
这里，HSS和服务器约定可以从信令面对UE进行寻呼的UE的类型，也即哪种UE有资格执行后续的步骤404～步骤412。
步骤402：执行用户接入认证授权流程；
这里，接入认证授权流程主要包括UE的初始附着、合法性认证、安全性认证等过程，在该过程中UE可完成对某个MME的附着，该MME保存自身标识与附着在其上的UE的标识，得到第一对应关系，HSS中保存该第一对应关系。接入认证授权流程具体请参见现有相关说明，此处不赘述。
步骤403：HSS判断UE1是否具有用户寻呼能力开放功能；
如果有，继续执行步骤404；
否则，结束本流程；
步骤404：HSS向SCEF上报第一对应关系；
步骤405：服务器发送UE1的标识，SCEF接收该标识；
这里，服务器需要向处于Idle状态的UE1发送下行数据包，先将UE1的 标识发送至SCEF。优选的，考虑到网络资源的有限性，在该下行数据包传输完成之后如果UE1不再进行数据的传输，需要触发其进入Idle态，服务器发送UE1的标识至SCEF时，还需要指示UE1进入Idle态的时间，以使得UE1在该时间到来时进入Idle态。
步骤406：在第一对应关系中，SCEF查找与UE1的标识相对应的MME标识，得到第一标识；
步骤407：SCEF向具有第一标识的MME发送链路建立请求；
步骤408：MME发送Paging消息给UE1所驻留的eNodeB，eNodeB向该UE1发送Paging消息，以触发UE1向网络侧发起寻呼业务请求(Service Request)，执行数据链路建立流程，建立UE1和网络侧的连接。
步骤409：MME通知SCEF数据链路已建立；
步骤410：SCEF通知服务器数据链路已建立；
步骤411：服务器通过所建立起的数据链路传输数据包至UE1。
如果UE1所驻留的MME发生变化，还包括步骤412：附着发生变化后的MME发送自身标识至SCEF，SCEF在第一对应关系中更新与UE1的标识对应的MME标识为附着变化后的MME标识。
前述方案中，HSS向SCEF执行寻呼能力开放过程，通过SCEF获取UE1的标识并确定与该标识相匹配的MME，并向该MME发送链接建立请求，以完成对UE1和服务器之间传输链路的建立，并通过该传输链路将数据包从服务器传输至UE1。实现从信令面对处于Idle态的UE进行寻呼，待传输的数据包无需在SGW/PGW中缓存，可大大缓解PGW/SGW网元的负荷、以及减少传输时延。
在图5中，为服务器触发MME执行对UE1的寻呼过程。
具体的，
步骤501：HSS和服务器进行用户寻呼能力开放签约；
这里，HSS和服务器约定可以从信令面对UE进行寻呼的UE的类型，也 即哪种UE有资格执行后续的步骤506～步骤511。
步骤502：执行用户接入认证授权流程；
这里，接入认证授权流程主要包括UE的初始附着、合法性认证、安全性认证等过程，在该过程中UE可完成对某个MME的附着，该MME保存自身标识与附着在其上的UE的标识，得到第一对应关系，HSS中保存该第一对应关系。接入认证授权流程具体请参见现有相关说明，此处不赘述。
步骤503：服务器发送UE1的标识，SCEF接收该标识；
步骤504：SCEF将UE1的标识发送至HSS；
步骤505：HSS判断UE1是否具有用户寻呼能力开放功能；
如果有，继续执行步骤506；
否则，结束本流程；
步骤506：HSS向MME发送链接建立请求；
步骤507：MME判断UE1是否处于Idle态；
如果判断MME处于Idle态时，执行步骤508；
否则，执行步骤509；
步骤508：MME发送Paging消息给UE1所驻留的eNodeB，eNodeB向该UE1发送Paging消息，以触发UE1向网络侧发起Service Request，执行数据链路建立流程，建立UE1和网络侧的连接；
步骤509：MME通知SCEF数据链路已建立；
步骤510：SCEF通知服务器数据链路已建立；
步骤511：服务器通过所建立起的数据链路传输数据包至UE1。
如果UE1所驻留的MME发生变化，还包括步骤512：附着发生变化后的MME发送自身标识至SCEF，SCEF在第一对应关系中更新与UE1的标识对应的MME标识为附着变化后的MME标识。
前述方案中，MME在接收到HSS发送的链接建立请求且判断出UE1处于Idle态时，MME执行对UE1进行寻呼的过程，以完成对UE1和服务器之间传 输链路的建立，并通过该传输链路将数据包从服务器传输至UE1。实现从信令面对处于Idle态的UE进行寻呼，待传输的数据包无需在SGW/PGW中缓存，可大大缓解PGW/SGW网元的负荷、以及减少传输时延。
需要说明的是，前述SCEF所执行的功能可通过独立的SCEF网元来实现，也可以通过集成于SGW/PGW中而实现。
综上所述，本发明实施例提供的用户连接的建立方法中，在接收第三方业务的服务器触发寻呼UE时，根据第一对应关系向UE附着的第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接，从而建立下行数据通道，使该第三方业务的服务器下发该UE的业务下行数据。该UE的业务下行数据存储在第三方业务的服务器，无需网元暂存数据，减轻了网元处理负荷；同时由于提供信令面的寻呼，优化了第三方业务的体验。
第二实施例、
请参见图6，其示出本发明第二实施例提供的用户连接的建立方法的流程示意图，该用户连接的建立方法可以包括：
步骤601，策略与计费规则功能网元PCRF获取用户设备UE当前附着的移动管理实体第一网元的网元标识。
这里，由PCRF获取与该第三方业务签约的UE的用户标识和该UE当前附着的第一网元的网元标识。
步骤602，PCRF向能力开放网元SCEF发送UE当前附着的第一网元的网元标识，使SCEF建立并维护UE的用户标识和UE当前所附着的第一网元的第一对应关系。
该实施例中，通过PCRF获取与该第三方业务签约的UE的标识(比如，UE的用户标识)和该UE当前附着的第一网元的网元标识，并向SCEF发送该网元标识，使SCEF建立并维护(记录)UE的用户标识和该第一网元的第 一对应关系，并根据第三方业务的服务器发送的与UE之间的链路建立请求，根据该第一对应关系确定UE当前附着的第一网元，向该第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接。
具体的，在本发明第二实施例的一种可选的实现方式中，策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识的步骤包括：
在对UE进行第三方业务接入认证授权时，判断第三方业务是否已开通寻呼优化功能；若是，则向分组数据网网关PGW/服务网关SGW获取UE当前附着的第一网元的网元标识。
具体的，移动互联网业务签约数据中增加第三方业务能力开放签约，当某一第三方业务签约后，为该第三方业务开通寻呼优化功能，当PCRF判断UE签约的第三方业务已开通寻呼优化功能，可以通过向PGW/SGW获取UE当前
附着的第一网元的网元标识，这里，本实施例不对PCRF向PGW/SGW获取UE当前附着的第一网元的网元标识的方式作限定。
进一步的，策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识的步骤还可以包括：
在向PGW/SGW获取UE当前附着的第一网元的网元标识之后，进一步向PGW/SGW订阅UE的第一网元改变事件，并在接收到PGW/SGW上报的UE的第一网元改变事件时，重新获取UE当前附着的第一网元的网元标识。
这里，PCRF通过向PGW/SGW订阅UE的第一网元改变事件，即可在UE切换附着的第一网元时接收到PGW/SGW上报的UE的第一网元改变事件，同时获取到UE当前新附着的第一网元的网元标识，并向SCEF发送UE当前
附着的第一网元的网元标识。其中，作为本发明第二实施例的一种可选的实现方式中，所述方法还包括：向SCEF发送UE当前的接入状态的信息，以 使SCEF接收并维护UE当前的接入状态，接入状态包括连接态和空闲态。
其中，作为本发明第二实施例的一种可选的实现方式中，第一网元为移动性管理网元。优选的，第一网元为移动管理实体MME。
综上所述，本发明实施例提供的用户连接的建立方法，通过PCRF获取UE当前附着的第一网元的网元标识，向SCEF发送该网元标识，使SCEF建立并维护UE的用户标识和该第一网元的第一对应关系，并根据第三方业务的服务器发送的与UE之间的链路建立请求，SCEF根据该第一对应关系确定UE当前附着的第一网元，向第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接，实现第三方业务的服务器对该UE的业务下行数据的下发，这样，以使得网元无需暂存数据，减轻了网元处理负荷；同时由于提供信令面的寻呼，优化了第三方业务的体验。
第三实施例
请参见图7，其示出了本发明第一实施例提供的用户连接的建立方法的流程示意图，该用户连接的建立方法可以包括：
步骤701，用户设备UE当前附着的第一网元，获取向能力开放网元SCEF发送注册消息的指示消息。
具体的，获取向能力开放网元SCEF发送注册消息的指示消息的步骤可以包括：接收策略与计费规则功能网元PCRF发送的向SCEF发送注册消息的指示消息。
具体的，步骤701中，获取向能力开放网元SCEF发送注册消息的指示消息的步骤可以包括：通过UE之前附着的第一网元下载网络侧的用户上下文数据，根据用户上下文数据获取向SCEF发送注册消息的指示消息。这里，该指示消息的获取可以通过由PCRF指示得到；也可以通过下载UE之前附着的第一网元中的用户上下文数据，根据该用户上下文数据得到向SCEF发送注册消息的指示消息。
步骤702，第一网元根据指示消息向SCEF发送注册消息，使SCEF记录 UE的用户标识和第一网元的第一对应关系。其中，UE签约的第三方业务已开通寻呼优化功能。
这里，在移动互联网业务签约数据中增加第三方业务能力开放签约，当某一第三方业务签约后，为该第三方业务开通寻呼优化功能。其中，第一网元为移动性管理网元。优选的，第一网元可以为移动管理实体MME。
上述实施例中，通过第一网元向SCEF发送注册消息，使SCEF记录UE的用户标识和第一网元的第一对应关系，并根据第三方业务的服务器发送的与UE之间的链路建立请求，SCEF根据该第一对应关系确定UE当前附着的第一网元，向该第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接。
综上所述，本发明实施例提供的用户连接的建立方法，通过第一网元向SCEF发送注册消息，使SCEF记录UE的用户标识和第一网元的第一对应关系，并根据第三方业务的服务器发送的与UE之间的链路建立请求，SCEF根据该第一对应关系确定UE当前附着的第一网元，向该第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接实现第三方业务的服务器对该UE的业务下行数据的下发，这样，以使得网元无需暂存数据，减轻了网元处理负荷；同时由于提供信令面的寻呼，优化了第三方业务的体验。
第四实施例
请参见图8，其示出了本发明第四实施例提供的能力开放网元装置的结构示意图，该能力开放网元装置800，包括：
获取及记录模块810，用于获取并记录用户设备UE的用户标识和UE当前所附着的第一网元的第一对应关系；
连接模块820，用于若接收到UE签约的第三方业务的服务器发送的建立与UE之间的链路建立请求，则根据获取及记录模块410记录的第一对应关 系，确定UE当前附着的第一网元，并向第一网元发送链路建立请求，以通过第一网元寻呼UE。
其中，所述获取及记录模块包括：第一接收单元，用于接收策略与计费规则功能单元PCRF发送的UE当前附着的第一网元的网元标识；第一建立单元，用于根据第一接收单元接收的网元标识，建立UE的用户标识和UE当前所附着的第一网元的第一对应关系。
其中，所述获取及记录模块包括：第二接收单元，用于接收UE当前附着的第一网元发送的注册消息，注册消息包括UE的用户标识和第一网元的网元标识；第二建立单元，用于根据第二接收单元接收的注册消息，建立UE的用户标识和UE当前所附着的第一网元的第一对应关系。
其中，所述的能力开放网元装置还包括：接收及维护模块，用于接收策略与计费规则功能单元PCRF发送的UE当前的接入状态的信息，并维护UE当前的接入状态，接入状态包括连接态和空闲态，并在接入状态为空闲态时，向第一网元发送链路建立请求。
其中，UE签约的第三方业务已开通寻呼优化功能。其中，第一网元为移动性管理网元。优选的，该第一网元为移动管理实体MME。综上所述，本发明实施例提供的能力开放网元装置，在接收第三方业务的服务器触发寻呼UE时，根据第一对应关系向UE附着的第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接，从而建立下行数据通道，使该第三方业务的服务器下发该UE的业务下行数据。该UE的业务下行数据存储在第三方业务的服务器，无需网元暂存数据，减轻了网元处理负荷；同时由于提供信令面的寻呼，优化了第三方业务的体验。
装置内包括：
第一获取单元830，用于获取待接收数据包的终端UE的标识；
第一确定单元，用于依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元840。
第一获取单元，用于获取第一对应关系，所述第一对应关系记录有UE的标识与UE所附着的第一网元的标识之间的对应关系；
所述第一接收单元，用于接收所述第一网元和/或用户归属服务器HSS上报的所述第一对应关系。
所述第一接收单元，用于接收服务器发送的所述待接收数据包的UE的标识；相应的，所述第一网元向所述待接收数据包的UE发起的所述链路建立请求为建立所述服务器与所述待接收数据包的UE之间的传输链路的请求。
获取及记录模块，用于接收所述第一网元上报的所述待接收数据包的UE的状态；如果所述UE的状态为空闲态Idle态，向所述第一网元发送所述链路建立请求。
接收及维护模块，用于如果所述待接收数据包的UE所附着的第一网元发生变化，则在第一对应关系中更新与所述待接收数据包的UE对应的第一网元的标识为附着变化后的第一网元的标识。
所述第一网元为移动管理实体MME或软件定义网络控制器SDN controller。
本领域技术人员应当理解，本实施例中所示的SCEF中的各处理单元的实现功能可参照前述图2～图5所示方法的相关描述而理解。本领域技术人员应当理解，图2所示的SCEF中各处理单元的功能可通过运行于处理器上的程序而实现，也可通过具体的逻辑电路而实现。
本发明实施例的SCEF，由于该SCEF解决问题的原理与前述的数据传输方法相似，因此，SCEF的实施过程及实施原理均可以参见前述方法的实施过程及实施原理描述，重复之处不再赘述。
第五实施例
请参见图9，其示出了本发明第五实施例提供的策略与计费规则功能网元PCRF装置的结构示意图，该策略与计费规则功能网元PCRF装置，包括：
获取模块910，用于策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识；
第一发送模块920，用于PCRF向能力开放网元SCEF发送获取模块510获取的UE当前附着的第一网元的网元标识，使SCEF建立并维护UE的用户标识和UE当前所附着的第一网元的第一对应关系。
其中，所述获取模块910包括：判断单元，用于在对UE进行第三方业务接入认证授权时，判断第三方业务是否已开通寻呼优化功能；获取单元，用于判断单元的判断结果若为是，则向分组数据网网关PGW/服务网关SGW获取UE当前附着的第一网元的网元标识。
进一步的，所述获取模块910还包括：
订阅及接收单元，用于在获取单元向PGW/SGW获取UE当前附着的第一网元的网元标识之后，进一步向PGW/SGW订阅UE的第一网元改变事件，并在接收到PGW/SGW上报的UE的第一网元改变事件时，重新获取UE当前附着的第一网元的网元标识。
其中，该PCRF装置还包括：第二发送模块，用于向SCEF发送UE当前的接入状态的信息，以使SCEF接收并维护UE当前的接入状态，接入状态包括连接态和空闲态。其中，第一网元为移动性管理网元。优选的，该第一网元为移动管理实体MME。
综上所述，本发明实施例提供的策略与计费规则功能网元PCRF装置，通过PCRF获取UE当前附着的第一网元的网元标识，向SCEF发送该网元标识，使SCEF记录UE的用户标识和该第一网元的第一对应关系，并根据第三方业务的服务器发送的与UE之间的链路建立请求，SCEF根据该第一对应关系确定UE当前附着的第一网元，向该第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接，实现第三方业务的服务器对该UE的业务下行数据的下发，这样，以使得网元无需暂存数据，减轻了网元处理负荷；同时由于提供信令面的寻呼，优化了第三方业务的 体验。
第六实施例
请参见图10，其示出了本发明第六实施例提供的第一网元装置的结构示意图，该第一网元装置1000，可以包括：
获取模块1010，用于用户设备UE当前附着的第一网元获取向能力开放网元SCEF发送注册消息的指示消息；
发送模块1020，用于第一网元根据获取模块610获取的指示消息向SCEF发送注册消息，该注册消息包括有UE的用户标识和第一网元的网元标识，使SCEF记录UE的用户标识和第一网元的第一对应关系。
其中，所述获取模块1010包括：第一获取单元，用于接收策略与计费规则功能网元PCRF发送的向SCEF发送注册消息的指示消息。
其中，所述获取模块1010包括：第二获取单元，用于通过UE之前附着的第一网元下载网络侧的用户上下文数据，根据用户上下文数据获取向SCEF发送注册消息的指示消息。其中，UE签约的第三方业务已开通寻呼优化功能。其中，第一网元为移动性管理网元。优选的，该第一网元为移动管理实体MME。
综上所述，本发明实施例提供的第一网元装置，通过第一网元向SCEF发送注册消息，使SCEF记录UE的用户标识和第一网元的第一对应关系，并根据第三方业务的服务器发送的与UE之间的链路建立请求，SCEF根据该第一对应关系确定UE当前附着的第一网元，向该第一网元发送链路建立请求，以通过该第一网元寻呼UE，使UE触发业务请求过程，建立与网络侧的连接实现第三方业务的服务器对该UE的业务下行数据的下发，这样，以使得网元无需暂存数据，减轻了网元处理负荷；同时由于提供信令面的寻呼，优化了第三方业务的体验。
上述实施例提供的能力开放网元装置、策略与计费规则功能网元装置、移动管理实体与用户连接的建立方法的实施例属于同一构思，其具体实现过程详见方法实施例，为避免重复，这里不再赘述。
最后，再结合附图，通过几个具体示例，对本发明作更为详细的说明。
请参见图11，其示出的是本发明实施例用户连接的建立方法的示例一，该具体实施示例一通过PCRF向SCEF注册寻呼能力，从而实现用户连接建立，具体步骤如下：
0、签约数据增加第三方用户能力开放签约；这里根据签约数据为某行业用户(第三方用户)的业务开通寻呼优化。
1、执行用户接入认证授权流程；
2、PCRF判断用户开通了寻呼能力开放功能；
3、向PGW/SGW获取UE附着的MME地址，并订阅MME改变事件；
4、PGW/SGW上报UE当前附着的MME地址，并且当MME切换时，向PCRF通知UE新附着的MME地址；
5、PCRF向SCEF注册用户附着的MME地址；这里即为PCRF向SCEF注册MME标识和用户标识的第一对应关系。
6、第三方业务的服务器指示SCEF建立用户的连接；此时，UE处于Idle状态，且PCRF已向SCEF上报用户的连接状态(Idle态)，SCEF记录UE的连接状态。
7、SCEF向MME发送建立用户连接的请求；
8、MME向注册的基站(eNodeB)发起寻呼(Paging)流程；
9、eNodeB向UE发起Paging流程；
10、UE发起连接请求流程，请求建立连接；
附着的MME通知SCEF用户连接建立；
12.SCEF通知第三方业务的服务器用户连接建立；此时，下行数据通道建立，第三方业务的服务器向UE下发业务下行数据。
13.如果UE切换附着的MME，则PCRF向SCEF注册新附着的MME地址。
该实施例中，上述SCEF逻辑可以由单独的网元实现，也可以基于HSS/PGW实现。
另外，在该实施例中，可以由第三方业务的服务器向SCEF发送建议UE进入Idle态的预定时间的指示，使UE待机时长满足预定时间时切断与UE之间的网络数据连接使UE进入Idle态，由SCEF根据第一对应关系通知UE当前附着的MME，或者经由PCRF通知UE。
请参见图12，其示出的是本发明实施例用户连接的建立方法的示例二，该具体实施示例二通过PCRF触发MME注册寻呼能力开放，从而实现用户连接建立，具体步骤如下：
0、签约数据增加第三方用户能力开放签约；这里根据签约数据为某行业用户(第三方用户)的业务开通寻呼优化。
1、执行用户接入认证授权流程；
2、PCRF判断用户开通了寻呼能力开放功能；
3、PCRF指示MME向SCEF注册UE附着的MME标识；
4、MME向SCEF注册UE附着的MME标识；
5、第三方业务的服务器指示SCEF建立用户的连接；此时，UE处于空闲(Idle)状态，且PCRF已向SCEF上报用户的连接状态(Idle态)，SCEF记录UE处于Idle态。
向MME发送建立用户连接的请求；
7、MME向注册的eNodeB发起Paging流程；
8、eNodeB向UE发起Paging流程；
9、UE发起连接请求流程，请求建立连接；
通知SCEF用户连接建立；
通知用户连接建立；此时，下行数据通道建立，第三方业务的服务器向UE下发业务下行数据。
12.如果UE切换附着的MME，则UE新附着的MME获取到向SCEF注册的指示消息，可以由PCRF指示获取或者由旧的MME下载用户上下文取得，新的MME根据指示消息向SCEF注册(在附图9中，并未将新旧MME区分，即用图中的MME表示UE当前附着的MME以及UE切换MME后新附着的MME)。该实施例中，上述SCEF逻辑可以由单独的网元实现，也可以基于HSS/PGW实现。
另外，在该实施例中，可以由第三方业务的服务器向SCEF发送建议UE进入Idle态的预定时间的指示，使UE待机时长满足预定时间时切断与UE之间的网络数据连接使UE进入Idle态，由SCEF根据第一对应关系通知UE当前附着的MME，或者经由PCRF通知UE。
请参见图13，其示出的是本发明实施例用户连接的建立方法的示例三，该具体实施示例三通过第三方业务触发MME注册寻呼能力开放，从而实现用户连接建立，具体步骤如下：
0、签约数据增加第三方用户能力开放签约；这里根据签约数据为某行业用户(第三方用户)的业务开通寻呼优化。
1、执行用户接入认证授权流程；
2、第三方指示建立用户连接；
3、建立用户连接；
4、PCRF判断用户开通了寻呼能力开放；
5a.PCRF指示MME向SCEF注册用户附着的MME标识；5b、MME向SCEF注册UE附着的MME标识；
6、第三方业务的服务器指示SCEF建立用户的连接；此时，UE处于Idle
状态，且PCRF已向SCEF上报用户的连接状态(Idle态)，SCEF记录UE处于Idle态。
7、SCEF向MME发送建立用户连接的请求；
8、MME向注册的eNodeB发起Paging流程；
9、eNodeB向UE发起Paging流程；
10.发起连接请求流程，请求建立连接；
11.通知SCEF用户连接建立；
12.SCEF通知用户连接建立；此时，下行数据通道建立，第三方业务的服务器向UE下发业务下行数据。
13.如果UE切换附着的MME，则UE新附着的MME获取到向SCEF注册的指示消息，可以由PCRF指示获取或者由旧的MME下载用户上下文取得，新的MME根据指示消息向SCEF注册(在附图10中，并未将新旧MME区分，即用图中的MME表示UE当前附着的MME以及UE切换MME后新附着的MME)。
该实施例中，上述SCEF逻辑可以由单独的网元实现，也可以基于HSS/PGW实现；若上述SCEF逻辑在PGW/SGW上实现，则可以直接通过第三方业务的服务器和PCRF之间建立联系。
另外，在该实施例中，可以由第三方业务的服务器向SCEF发送建议UE进入Idle态的预定时间的指示，使UE待机时长满足预定时间时切断与UE之间的网络数据连接使UE进入Idle态，由SCEF根据第一对应关系通知UE当前附着的MME，或者经由PCRF通知UE。本发明的上述实施例通过提供信令面的寻呼机制，减少了用户寻呼延迟，减轻了网关负荷，优化了第三方业务的体验，同时也实现了信令层面的收费。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品 的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围。
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。

Claims (38)

  1. 一种用户连接的建立方法，所述方法包括：
    获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系；
    若确定需要建立与所述UE之间的链路，则根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求。
  2. 根据权利要求1所述的方法，其中，所述确定需要建立与所述UE之间的链路，包括：
    若接收到第三方业务的服务器发送的建立与所述UE之间的链路建立请求，则确定需要建立与UE之间的链路。
  3. 根据权利要求2所述的方法，其中，所述获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系，包括：
    接收策略与计费规则功能网元PCRF发送的所述UE当前附着的第一网元的网元标识；
    根据所述网元标识，建立所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
  4. 根据权利要求2所述的方法，其中，所述获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系，包括：
    接收所述UE当前附着的第一网元发送的注册消息，所述注册消息包括所述UE的标识和所述第一网元的网元标识；
    根据所述注册消息，建立所述UE的标识和所述UE当前所附着的第一网元的第一对应关系。
  5. 根据权利要求1所述的方法，其中，在根据所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求，以通过所述第一网元寻呼所述UE之前，所述方法还包括：
    接收策略与计费规则功能网元PCRF发送的所述UE当前的接入状态的信息，并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态，并在所述接入状态为空闲态时，向所述第一网元发送链路建立请求。
  6. 根据权利要求1所述的方法，其中，所述确定需要建立与所述UE之间的链路之前，所述方法还包括：
    从待接收数据包中获取UE的标识；
    依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元。
  7. 根据权利要求6所述的方法，其中，所述依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元，包括：
    在所获取的第一对应关系中，确定与所述待接收数据包的UE的标识相对应的第一网元标识，得到第一标识；
    确定具有第一标识的第一网元为与所述待接收数据包的UE相匹配的第一网元。
  8. 根据权利要求1所述的方法，其中，所述获取第一对应关系，包括：
    接收所述第一网元和/或用户归属服务器HSS上报的所述第一对应关系。
  9. 根据权利要求6所述的方法，其中，所述从待接收数据包中获取UE的标识，包括：
    接收服务器发送的所述待接收数据包的UE的标识；
    相应的，所述第一网元向所述待接收数据包的UE发起的所述链路建立请求为建立所述服务器与所述待接收数据包的UE之间的传输链路的请求。
  10. 根据权利要求1所述的方法，其中，在向所述第一网元发送链路建立请求之前，所述方法还包括：
    接收所述第一网元上报的所述待接收数据包的UE的状态；
    如果所述UE的状态为空闲态Idle态，向所述第一网元发送所述链路建立请求。
  11. 根据权利要求6或7所述的方法，其中，所述方法还包括：
    如果所述待接收数据包的UE所附着的第一网元发生变化，则在第一对应关系中更新与所述待接收数据包的UE对应的第一网元的标识为附着变化后的第一网元的标识。
  12. 根据权利要求6所述的方法，其中，所述第一网元为移动管理实体MME或软件定义网络控制器SDN controller。
  13. 一种用户连接的建立方法，所述方法包括：
    策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识；
    所述PCRF向能力开放网元SCEF发送所述UE当前附着的第一网元的网元标识，使所述SCEF建立并维护所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
  14. 根据权利要求13所述的方法，其中，所述策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识，包括：
    在对所述UE进行第三方业务接入认证授权时，判断所述第三方业务是否已开通寻呼优化功能；
    若是，则向分组数据网网关PGW/服务网关SGW获取所述UE当前附着的第一网元的网元标识。
  15. 根据权利要求14所述的方法，其中，所述策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识，还包括：
    在向所述PGW/SGW获取所述UE当前附着的第一网元的网元标识之后，向所述PGW/SGW订阅所述UE的第一网元改变事件，并在接收到所述PGW/SGW上报的所述UE的第一网元改变事件时，重新获取所述UE当前附着的第一网元的网元标识。
  16. 根据权利要求13所述的方法，其中，所述方法还包括：
    向所述SCEF发送所述UE当前的接入状态的信息，以使所述SCEF接收并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态。
  17. 一种用户连接的建立方法，所述方法包括：
    用户设备UE当前附着的第一网元，获取向能力开放网元SCEF发送注册消息的指示消息；
    所述第一网元根据所述指示消息向所述SCEF发送注册消息，所述注册消息包括有所述UE的用户标识和所述第一网元的网元标识，使所述SCEF记录所述UE的用户标识和所述第一网元的第一对应关系。
  18. 根据权利要求17所述的方法，其中，所述获取向能力开放网元SCEF发送注册消息的指示消息，包括：
    接收策略与计费规则功能网元PCRF发送的向所述SCEF发送注册消息的指示消息。
  19. 根据权利要求17所述的方法，其中，所述获取向能力开放网元SCEF发送注册消息的指示消息，包括：
    通过所述UE之前附着的第一网元下载网络侧的用户上下文数据，根据所述用户上下文数据获取所述向所述SCEF发送注册消息的指示消息。
  20. 一种能力开放网元SCEF装置，其中，包括：
    获取及记录模块，用于获取并记录用户设备UE的标识和所述UE当前所附着的第一网元的第一对应关系；
    连接模块，用于若确定需要建立与所述UE之间的链路，则根据所述获取及记录模块记录的所述第一对应关系，确定所述UE当前附着的第一网元，并向所述第一网元发送链路建立请求。
  21. 根据权利要求20所述的装置，其中，连接模块，用于若接收到第三方业务的服务器发送的建立与所述UE之间的链路建立请求，则确定需要建立与UE之间的链路。
  22. 根据权利要求21所述的装置，其中，所述获取及记录模块包括：
    第一接收单元，用于接收策略与计费规则功能单元PCRF发送的所述UE当前附着的第一网元的网元标识；
    第一建立单元，用于根据所述第一接收单元接收的所述网元标识，建立所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
  23. 根据权利要求22所述的装置，其中，所述获取及记录模块包括：
    第二接收单元，用于接收所述UE当前附着的第一网元发送的注册消息，所述注册消息包括所述UE的用户标识和所述第一网元的网元标识；
    第二建立单元，用于根据所述第二接收单元接收的所述注册消息，建立所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
  24. 根据权利要求20所述的装置，其中，还包括：
    接收及维护模块，用于接收策略与计费规则功能单元PCRF发送的所述UE当前的接入状态的信息，并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态，并在所述接入状态为空闲态时，向所述第一网元发送链路建立请求。
  25. 根据权利要求20所述的装置，其中，还包括：
    第一获取单元，用于从待接收数据包中获取UE的标识；
    第一确定单元，用于依据所述UE的标识，确定与所述待接收数据包的UE相匹配的第一网元。
  26. 根据权利要求25所述的装置，其中，所述第一确定单元，用于在所获取的第一对应关系中，确定与所述待接收数据包的UE的标识相对应的第一网元标识，得到第一标识；
    确定具有第一标识的第一网元为与所述待接收数据包的UE相匹配的第一网元。
  27. 根据权利要求22所述的装置，其中，所述第一接收单元，用于接收所述第一网元和/或用户归属服务器HSS上报的所述第一对应关系。
  28. 根据权利要求27所述的装置，其中，所述第一接收单元，用于接收服务器发送的所述待接收数据包的UE的标识；相应的，所述第一网元向所述待接收数据包的UE发起的所述链路建立请求为建立所述服务器与所述待接收数 据包的UE之间的传输链路的请求。
  29. 根据权利要求20所述的装置，其中，获取及记录模块，用于接收所述第一网元上报的所述待接收数据包的UE的状态；如果所述UE的状态为空闲态Idle态，向所述第一网元发送所述链路建立请求。
  30. 根据权利要求26或27所述的装置，其中，还包括：
    接收及维护模块，用于如果所述待接收数据包的UE所附着的第一网元发生变化，则在第一对应关系中更新与所述待接收数据包的UE对应的第一网元的标识为附着变化后的第一网元的标识。
  31. 根据权利要求25所述的装置，其中，所述第一网元为移动管理实体MME或软件定义网络控制器SDN controller。
  32. 一种策略与计费规则功能网元PCRF装置，包括：
    获取模块，用于策略与计费规则功能网元PCRF获取用户设备UE当前附着的第一网元的网元标识；
    第一发送模块，用于所述PCRF向能力开放网元SCEF发送所述获取模块获取的所述UE当前附着的第一网元的网元标识，使所述SCEF建立并维护所述UE的用户标识和所述UE当前所附着的第一网元的第一对应关系。
  33. 根据权利要求32所述的装置，其中，所述获取模块包括：判断单元，用于在对所述UE进行第三方业务接入认证授权时，判断所述第三方业务是否已开通寻呼优化功能；获取单元，用于所述判断单元的判断结果若为是，则向分组数据网网关PGW/服务网关SGW获取所述UE当前附着的第一网元的网元标识。
  34. 根据权利要求33所述的装置，其中，所述获取模块还包括：
    订阅及接收单元，用于在获取单元向所述PGW/SGW获取所述UE当前附着的第一网元的网元标识之后，进一步向所述PGW/SGW订阅所述UE的第一网元改变事件，并在接收到所述PGW/SGW上报的所述UE的第一网元改变事件时，重新获取所述UE当前附着的第一网元的网元标识。
  35. 根据权利要求32所述的装置，其中，还包括：
    第二发送模块，用于向所述SCEF发送所述UE当前的接入状态的信息，以使所述SCEF接收并维护所述UE当前的接入状态，所述接入状态包括连接态和空闲态。
  36. 一种第一网元装置，包括：
    获取模块，用于用户设备UE当前附着的第一网元，获取向能力开放网元SCEF发送注册消息的指示消息；
    发送模块，用于所述第一网元根据所述获取模块获取的所述指示消息向所述SCEF发送注册消息，所述注册消息包括有所述UE的用户标识和所述第一网元的网元标识，使所述SCEF记录所述UE的用户标识和所述第一网元的第一对应关系。
  37. 根据权利要求36所述的装置，其中，所述获取模块包括：
    第一获取单元，用于接收策略与计费规则功能网元PCRF发送的向所述SCEF发送注册消息的指示消息。
  38. 根据权利要求36所述的装置，其中，所述获取模块包括：
    第二获取单元，用于通过所述UE之前附着的第一网元下载网络侧的用户上下文数据，根据所述用户上下文数据获取所述向所述SCEF发送注册消息的指示消息。
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