WO2012149793A1 - 多接入场景下执行分组数据网连接的方法 - Google Patents

多接入场景下执行分组数据网连接的方法 Download PDF

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Publication number
WO2012149793A1
WO2012149793A1 PCT/CN2011/080492 CN2011080492W WO2012149793A1 WO 2012149793 A1 WO2012149793 A1 WO 2012149793A1 CN 2011080492 W CN2011080492 W CN 2011080492W WO 2012149793 A1 WO2012149793 A1 WO 2012149793A1
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WO
WIPO (PCT)
Prior art keywords
pdn connection
3gpp
pgw2
3gpp side
information
Prior art date
Application number
PCT/CN2011/080492
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English (en)
French (fr)
Inventor
蔡慧
李欢
时书锋
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2011/080492 priority Critical patent/WO2012149793A1/zh
Priority to CN201180002602.5A priority patent/CN102511195B/zh
Publication of WO2012149793A1 publication Critical patent/WO2012149793A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W12/00Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06Authentication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/10Connection setup

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and more specifically, to a method for performing a Packet Data Network (PDN) connection in a multiple access scenario.
  • PDN Packet Data Network
  • Evolved UMTS Terrestrial Radio Access Network Evolved UMTS Terrestrial Radio Access Network
  • E-UTRAN Evolved UMTS Terrestrial Radio Access Network
  • MME Mobility Management Entity
  • SGW Serving Gateway
  • PGW Packet Data Network Gateway
  • PGW Policy and Charging Rule Function
  • HSS Home Subscriber Server
  • UMTS Terrestrial Radio Access Network UMTS
  • GSM/EDGE Radio Access Network GSM/EDGE
  • Non-3GPP IP Access Network Non-3GPP IP Access Network
  • WLAN Wireless Local Area Network
  • CDMA Code Division Multiple Access
  • AAA Authentication, Authorization and Accounting Server
  • Multi-access technology is an access technology that is sent along with the evolution of the network. According to the single-chip, the UE can simultaneously access multiple different types of access networks (for example, simultaneous access to WLAN networks and LTE). Network), connected to different or the same data network by one or more data gateways deployed by the operator, when the UE initiates to the same PDN network under two different access technologies
  • the access gateways of the two access technologies will select the PGW.
  • the access gateways under different access technologies may choose different. PGW.
  • the UE has established a PDN connection of an Access Point Name (APN) on the 3GPP side, anchors it to PGW1, and inserts the binding relationship between PGW1 and APN into the HSS.
  • APN Access Point Name
  • the Simultaneous Attach process needs to be initiated.
  • the access gateway on the Non-3GPP side obtains the APN on the 3GPP side from the subscription data sent by the HSS according to the APN and the Simultaneous Attach message sent by the UE.
  • the attached PGW1 information is then initiated to the PGW1 to attach the APN.
  • the initial attach process is initiated.
  • the access gateway considers that the UE is attached for the first time, and does not select the binding relationship between the APN and the PGW1 from the subscription data sent by the HSS. Instead, the access gateway selects a new PGW for the UE. In this way, the same APN may be attached to different PGWs under different access technologies, so that parameters such as APN-AMBR cannot be controlled, which in turn affects service continuity.
  • the embodiment of the invention provides a method for performing packet data network connection in a multiple access scenario, which can Solving the problem that the APN-AMBR and other parameters cannot be controlled due to the non-uniqueness of the PGW in the multi-access scenario, which affects the continuity of the service.
  • a method for performing a packet data network connection in a multiple access scenario including: when a user equipment UE initiates a packet data network PDN connection establishment on a Non-3GPP side, the home subscription subscriber server HSS receives the Non-3GPP side. a registration request message of the packet data gateway PGW2, where the message carries the information of the PGW2;
  • the information of the 3GPP side packet data gateway PGW1 registered in the HSS is different, and the HSS requests the mobility management entity to update the PDN connection on the 3GPP side;
  • the HSS rejects the registration request of the PGW2, and sends the subscription data of the UE to the authentication, authorization, and accounting AAA server, so as to The AAA server according to the subscription data pair of the UE
  • the PDN connection on the Non-3GPP side is processed, where the subscription data of the UE carries the information of the PGW1.
  • a method for performing a packet data network connection in a multiple access scenario including: when a user equipment UE initiates a packet data network PDN connection establishment on a Non-3GPP side, the home subscription subscriber server HSS receives Non-3GPP a registration request message of the side packet data gateway PGW2, where the message carries the information of the PGW2;
  • the HSS uses information of the PGW2 to replace information of the 3GPP side packet data gateway PGW1 registered in the HSS when the UE establishes a PDN connection on the 3GPP side;
  • the HSS sends a subscription information update request message to the mobility management entity, requesting to update the subscription information of the UE, where the subscription information update request message carries the information of the PGW2, so that the mobility management entity according to the The information of PGW2 updates the PDN connection on the 3GPP side.
  • a method for performing a packet data network connection in a multiple access scenario including: when a user equipment UE initiates a packet data network PDN connection establishment on a Non-3GPP side, the home subscription subscriber server HSS receives Non-3GPP a registration request message of the side packet data gateway PGW2, where the message carries the information of the PGW2;
  • the HSS decides to reserve the PDN connection on the 3GPP side or the PDN connection on the Non-3GPP side according to the priority of the configured access technology, and triggers the mobility management entity or the authentication, authorization, and accounting AAA server to initiate another according to the decision result.
  • the method provided by the embodiment of the present invention can determine the uniqueness of the PGW by establishing a PDN connection through the same PGW when the UE is connected to the same PDN network from different access networks in the multiple access scenario.
  • parameters such as APN-AMBR can be controlled to maintain business continuity.
  • FIG. 1 is a flow chart of a method of performing a packet data network connection in a multiple access scenario according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of a method for performing a packet data network connection in a multiple access scenario according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for performing a packet data network connection in a multiple access scenario according to another embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for performing a packet data network connection in a multiple access scenario according to another embodiment of the present invention.
  • FIG. 5 is a schematic flowchart of a method for performing a packet data network connection in a multiple access scenario according to another embodiment of the present invention.
  • FIG. 6 is a schematic flow chart of a method for performing a packet data network connection in a multiple access scenario according to another embodiment of the present invention. detailed description
  • the "reception” and “transmission” described in the embodiments of the present invention may indicate direct reception or transmission, and may also indicate indirect reception or transmission through one or more intermediate network elements/devices. limit.
  • the mobility management entity in the embodiment of the present invention is the SGSN for the GERAN/UTRAN network and the MME for the E-UTRAN network, which is not limited by the present invention.
  • the Non-3GPP access gateway in the embodiment of the present invention may be an Acess Gateway (AGW), which is not limited in the present invention.
  • AGW Acess Gateway
  • the multi-access scenario is caused by the non-uniqueness of the PGW.
  • Embodiments of the present invention provide a method for performing packet data network connection in a multiple access scenario. As shown in Figure 1, the following steps are specifically included:
  • Step 101 When the user equipment UE initiates the PDN connection establishment of the packet data network on the Non-3GPP side, the home subscription subscriber server HSS receives the registration request message of the Non-3GPP side packet data gateway PGW2, where the message carries the information of the PGW2. ;
  • Step 102 If the information of the PGW2 and the UE establish a PDN connection on the 3GPP side, the information of the 3GPP side packet data gateway PGW1 registered in the HSS is different,
  • the HSS requests the mobility management entity to update the PDN connection on the 3GPP side;
  • Step 103 If the mobility management entity refuses to update the PDN connection on the 3GPP side, the HSS rejects the registration request of the PGW2, and sends the subscription data of the UE to the authentication, authorization, and accounting AAA server.
  • the AAA server processes the PDN connection on the Non-3GPP side according to the subscription data of the UE, where the subscription data of the UE carries the information of the PGW1.
  • the refusing to update the PDN connection of the 3GPP side by the mobility management entity includes:
  • the mobility management entity determines that the UE still maintains a PDN connection on the 3GPP side, refusing to update the PDN connection on the 3GPP side;
  • the mobility management entity determines that the UE does not detach on the 3GPP side, refusing to update the PDN connection on the 3GPP side; or
  • the mobility management entity queries the UE whether to update the PDN connection of the 3GPP side, and if the UE rejects the update, the mobility management entity refuses to update the PDN connection of the 3GPP side.
  • the AAA server processes the PDN connection on the Non-3GPP side according to the subscription data, and specifically includes: The AAA server determines that the PGW1 and the PGW2 are different according to the information of the PGW1 carried in the subscription data, where the AAA server stores the information of the PGW2; the AAA server notifies the PGW2 that the registration fails. So that the PGW2 notifies the UE that the PDN connection establishment on the Non-3GPP side fails, and deletes the PDN connection on the Non-3GPP side; or
  • the AAA server determines that the PGW1 and the PGW2 are different according to the information of the PGW1 carried in the subscription data, where the AAA server stores information of the PGW2; the AAA server is configured according to the subscription data.
  • the information of the carried PGW1 initiates redirection of the PGW on the Non-3GPP side.
  • the AAA server initiates redirection of the PGW on the Non-3GPP side according to the information of the PGW1 carried in the subscription data, and specifically includes:
  • the AAA server sends the information of the PGW1 to the Non-3GPP access gateway through the PGW2, and the Non-3GPP access gateway establishes a PDN connection to the PGW1.
  • the AAA server sends the information of the PGW1 to the UE through the PGW2, and the UE establishes a PDN connection to the PGW1.
  • the method may further include:
  • the mobility management entity tears down the PDN connection of the 3GPP side, and returns a response message for updating the PDN connection of the 3GPP side to the HSS And the HSS accepts the registration request of the PGW2 according to the received response message.
  • the mobility management entity agrees to update the PDN connection on the 3GPP side, and specifically includes: agreeing to update the PDN connection on the 3GPP side; or
  • the mobility management entity determines that the UE is detached on the 3GPP side, agree to update the PDN connection on the 3GPP side;
  • the mobility management entity queries the UE to update the PDN connection of the 3GPP side, and if the UE agrees to update, the mobility management entity agrees to update the PDN connection of the 3GPP side.
  • the embodiment of the present invention further provides a packet data network connection in another multiple access scenario.
  • the methods include:
  • the home subscriber network server HSS receives the registration request message of the Non-3GPP side packet data gateway PGW2, and the message carries the information of the PGW2;
  • the HSS uses information of the PGW2 to replace information of the 3GPP side packet data gateway PGW1 registered in the HSS when the UE establishes a PDN connection on the 3GPP side;
  • the HSS sends a subscription information update request message to the mobility management entity, requesting to update the subscription information of the UE, where the subscription information update request message carries the information of the PGW2, so that the mobility management entity ⁇
  • the PDN connection on the 3GPP side is updated according to the information of the PGW2.
  • the mobility management entity updates the PDN connection on the 3GPP side according to the information of the PGW2, specifically:
  • the mobility management entity checks the subscription information of the locally recorded UE, and if it is determined that the PGW1 and the PGW2 are different, the PDN connection of the 3GPP side is updated.
  • the embodiment of the present invention further provides a method for performing a packet data network connection in a multiple access scenario, which specifically includes:
  • the home subscriber network server HSS receives the registration request message of the Non-3GPP side packet data gateway PGW2, and the message carries the information of the PGW2;
  • the HSS decides to reserve the PDN connection on the 3GPP side or the PDN connection on the Non-3GPP side according to the priority of the configured access technology, and triggers the mobility management entity or the authentication, authorization, and accounting AAA server to initiate another according to the decision result.
  • the deletion of the side PDN connection is not limited to the 3GPP side or the PDN connection on the Non-3GPP side according to the priority of the configured access technology, and triggers the mobility management entity or the authentication, authorization, and accounting AAA server to initiate another according to the decision result.
  • the HSS decides to reserve the PDN connection on the 3GPP side or the PDN connection on the Non-3GPP side according to the priority of the configured access technology, and triggers the mobility management entity or the authentication, authorization, and accounting AAA according to the decision result.
  • the server initiates the deletion of the PDN connection on the other side, including:
  • the HSS determines to reserve the PDN connection on the 3GPP side, and delivers the new subscription data of the UE to the AAA server, where the AAA server Initiating deletion of the Non-3GPP side PDN connection, where the new subscription data includes information of the PGW1;
  • the HSS decision is guaranteed. Retaining the PDN connection of the Non-3GPP side, and transmitting the new subscription data of the UE to the mobility management entity, where the mobility management entity initiates deletion of the PDN connection on the 3GPP side, where The information about the PGW2 is included in the new subscription data.
  • FIG. 2 The processing flow of the method for performing PD connection in a multiple access scenario proposed in this embodiment is shown in FIG. 2. Specifically, the following steps are included:
  • Step 201 The UE initiates an initial attach procedure, and the mobility management entity (such as the MME) selects the PGW1 to establish a PDN connection on the 3GPP side.
  • the mobility management entity such as the MME
  • the UE initially sends an Initial Attach message, and the mobility management entity selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the mobility management entity selects the PGW for the UE according to the default APN in the subscription data of the UE delivered by the HSS.
  • Step 202 The mobility management entity registers the information of the PGW1 (including the address or identifier of the PGW1) to the HSS through the registration process, and the HSS records the correspondence between the UE identifier, the APN information, and the PGW1 information.
  • Step 203 The UE selects the PGW2 through the Non-3GPP access gateway (for example, AGW) on the Non-3GPP side to establish a PDN connection for accessing the same APN.
  • AGW Non-3GPP access gateway
  • the UE initiates an initial attach procedure, and sends an Initial Attach message
  • the Non-3GPP access gateway selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the Non-3GPP access gateway selects the PGW for the UE or returns the information of the default APN to the UE according to the default APN in the subscription data of the UE delivered by the HSS. The corresponding PGW.
  • Step 204 The PGW2 registers the information of the PGW2 with the HSS through the AAA server.
  • the HSS records the UE identity, the correspondence between the APN information and the PGW2 information, and updates the registration information of the locally saved PGW.
  • Step 205 The HSS sends a subscription information update message to the recorded mobility management entity according to the registration information of the saved mobility management entity, and requests to update the subscription information of the UE, where the subscription information update message carries the information of the PGW2.
  • Step 206 The mobility management entity checks the subscription information, and if the PGW is updated, the judgment and the first If the previously established connection is different, the PDN connection deletion process is initiated, the PDN connection previously established on the 3GPP side is deleted, and the UE is notified of the deletion reason.
  • Step 207 The mobility management entity initiates a redirection process to the PGW2 on the 3GPP side according to the received information of the PGW2.
  • the UE is connected to the same PDN network at the same time.
  • This embodiment is also applicable to the scenario where PGW1 and PGW2 are the same PGW.
  • Embodiment 2
  • FIG. 3 Another processing flow of the method for performing PDN connection in a multiple access scenario proposed in this embodiment is shown in FIG. 3. Specifically, the following steps are included:
  • Step 301 The UE initiates an initial attach procedure, and the mobility management entity selects PGW1 to establish a PDN connection on the 3GPP side.
  • the UE initially sends an Initial Attach message, and the mobility management entity selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the mobility management entity selects the PGW for the UE according to the default APN in the subscription data of the UE delivered by the HSS.
  • Step 302 The mobility management entity registers the information of the PGW1 (including the address or identifier of the PGW1) to the HSS through the registration process, and the HSS records the correspondence between the UE identifier, the APN information, and the PGW1 information.
  • Step 303 The UE selects PGW2 through the Non-3GPP access gateway on the Non-3GPP side to establish a PDN connection for accessing the same APN.
  • the UE initiates an initial attach procedure, and sends an Initial Attach message
  • the Non-3GPP access gateway selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the Non-3GPP access gateway selects the PGW for the UE or returns the information of the default APN to the UE according to the default APN in the subscription data of the UE delivered by the HSS. The corresponding PGW.
  • Step 304 The PGW2 sends a registration request message to the HSS through the AAA server, requesting to register the information of the PGW2 (including the address or identifier of the PGW2).
  • Step 305 The HSS sends a PDN connection request message to the mobility management entity, and carries the information of the PGW2 (including the address or identifier of the PGW2) to request to update the PGW in the UE subscription data. After receiving the PDN connection request message, if the mobility management entity finds that the UE still has a connection, it returns a response message to the HSS to reject the update; or
  • the mobility management entity may initiate an inquiry to the UE by the network side device (for example, the mobility management entity itself, the short message center, or the background server, etc.), for example, the mobility management entity passes the The signaling queries the UE, or the mobility management entity queries the UE through the short message device, whether to update the PGW of the PDN connection, and if the UE rejects, the mobility management entity returns a response message to the HSS, rejecting the update, and the HSS receives the After the response message, step 306 is performed; if the UE agrees, the mobility management entity tears down the PDN connection on the 3GPP side.
  • the network side device for example, the mobility management entity itself, the short message center, or the background server, etc.
  • Step 306 The HSS returns a registration response message to the PGW 2 according to the response message of the received mobility management entity, rejects the current registration request of the PGW2, and sets the subscription data of the UE (including the UE identifier, the correspondence between the APN and the PGW1).
  • the AAA server sends a PGW conflict according to the received subscription data of the UE, and returns a response message to the PGW2 to notify the PGW2 that the registration fails.
  • the PGW2 performs step 307 according to the registration failure response message.
  • the HSS may also carry the PGW1 on the 3GPP side to the AAA server, and perform PGW redirection on the Non-3GPP side.
  • the redirection process includes:
  • the AAA server carries the PGW1 identifier of the 3GPP side to the Non-3GPP access gateway through the PGW2, and the Non-3GPP access gateway performs the PMIP to the PGW1 of the 3GPP side.
  • the AAA server carries the PGW1 identifier of the 3GPP side to the UE through the PGW2, and the UE binds to the PGW1 of the 3GPP side.
  • Step 307 The PGW2 responds to the Non-3GPP access gateway/ePDG or the UE connection establishment failure, and notifies the failure reason.
  • the PGW2 fails to establish a Non-3GPP access gateway or the ePDG connection, and the Non-3GPP access gateway or the ePDG fails to respond to the establishment of the UE, and carries the failure cause value; in the S2c-DSMIPv6 scenario, The PGW2 sends a response message directly to the UE, notifying the UE that the connection establishment fails, and carrying the failure cause value in the response message.
  • Embodiment 3 Another processing flow of the method for performing PD connection in a multiple access scenario proposed by this embodiment is shown in FIG. 4 . Specifically, the following steps are included:
  • Step 401 The UE initiates an initial attach procedure, and the mobility management entity selects PGW1 to establish a PDN connection on the 3GPP side.
  • the UE initially attaches and sends an Initial Attach message, and the mobility management entity according to the Initial
  • the APN information carried in the Attach message selects the corresponding PGW for the UE. If the APN information is not carried in the Initial Attach message sent by the UE, the mobility management entity selects the PGW for the UE according to the default APN in the subscription data of the UE delivered by the HSS.
  • Step 402 The mobility management entity registers the information of the PGW1 (including the address or identifier of the PGW1) to the HSS through the registration process, and the HSS records the correspondence between the UE identifier, the APN information, and the PGW1 information.
  • Step 403 The UE selects PGW2 through the Non-3GPP access gateway on the Non-3GPP side to establish a PDN connection for accessing the same APN.
  • the UE initiates an initial attach procedure, and sends an Initial Attach message
  • the Non-3GPP access gateway selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the Non-3GPP access gateway selects the PGW for the UE or returns the information of the default APN to the UE according to the default APN in the subscription data of the UE delivered by the HSS. The corresponding PGW.
  • Step 404 The PGW2 sends a registration request message to the HSS through the AAA server, requesting to register the information of the PGW2 (including the address or identifier of the PGW2).
  • Step 405 The HSS sends a PDN connection request message to the mobility management entity, and queries the mobility management entity whether it is necessary to continue to maintain the original 3GPP side PDN connection. If the mobility management entity finds that the UE has detached (eg, the mobility management entity discovers that the UE has detached by initiating a paging procedure to the UE), it does not reserve the connection to the HSS and removes the PDN connection on the 3GPP side, HSS According to the response message, the registration request of PGW2 is accepted according to the normal procedure; if the mobility management entity finds that the UE is not detached, the connection is reserved to the HSS, and the HSS performs step 406.
  • the mobility management entity finds that the UE has detached (eg, the mobility management entity discovers that the UE has detached by initiating a paging procedure to the UE), it does not reserve the connection to the HSS and removes the PDN connection on the 3GPP side, HSS According to the response message, the registration request of PGW2 is accepted according to the
  • Step 406 The HSS sends the subscription data of the UE (including the PGW1 information of the 3GPP side) to the AAA server, and the AAA server finds that the PGW conflicts, and the PGW2 registration fails.
  • Step 407 The PGW2 responds to the Non-3GPP access gateway/ePDG or the UE connection establishment fails, and notifies the failure reason. Specifically, in the S2a-S2b-PMIP scenario, the PGW2 fails to establish a Non-3GPP access gateway or the ePDG connection, and the Non-3GPP access gateway or the ePDG fails to respond to the establishment of the UE, and carries the failure cause value; in the S2c-DSMIPv6 scenario, The PGW2 sends a response message directly to the UE, notifying the UE that the connection establishment fails, and carrying the failure cause value in the response message.
  • the UE is connected to the same PDN network at the same time.
  • This embodiment is also applicable to the scenario where PGW1 and PGW2 are the same PGW.
  • Embodiment 4 is also applicable to the scenario where PGW1 and PGW2 are the same PGW.
  • FIG. 5 Another processing flow of the method for performing PD connection in a multiple access scenario proposed by this embodiment is shown in FIG. 5. Specifically, the following steps are included:
  • Step 501 The UE initiates an initial attach procedure, and the mobility management entity selects PGW1 to establish a PDN connection on the 3GPP side.
  • the UE initially sends an Initial Attach message, and the mobility management entity selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the mobility management entity selects the PGW for the UE according to the default APN in the subscription data of the UE delivered by the HSS.
  • Step 502 The mobility management entity registers the information of the PGW1 (including the address or identifier of the PGW1) to the HSS through the registration process, and the HSS records the correspondence between the UE identifier, the APN information, and the PGW1 information.
  • Step 503 The UE selects PGW2 through the Non-3GPP access gateway on the Non-3GPP side to establish a PDN connection for accessing the same APN.
  • the UE initiates an initial attach procedure, and sends an Initial Attach message
  • the Non-3GPP access gateway selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the Non-3GPP access gateway selects the PGW for the UE or returns the information of the default APN to the UE according to the default APN in the subscription data of the UE delivered by the HSS. The corresponding PGW.
  • Step 504 The PGW2 sends a registration request message to the HSS through the AAA server, requesting to register the information of the PGW2 (including the address or identifier of the PGW2).
  • Step 505 The HSS sends a PDN connection request message to the mobility management entity, and queries the mobility management entity whether it is necessary to continue to maintain the original 3GPP side PDN connection. If mobility management The UE finds that the UE has been detached (for example, the mobility management entity discovers that the UE has detached by initiating a paging procedure to the UE), then does not reserve the connection to the HSS, and removes the PDN connection on the 3GPP side. According to the response message, the HSS follows the normal procedure. The registration request of the PGW2 is accepted; if the mobility management entity finds that the UE is not detached, the connection is reserved to the HSS, and the HSS performs step 506.
  • Step 506 The HSS responds to the AAA server registration failure, and the AAA server responds to the PGW2 registration failure.
  • the response message carries the information of the PGW 1 and indicates to the PGW1.
  • the PGW2 fails to respond to the Non-3GPP access gateway/ePDG or the UE connection establishment.
  • the PGW2 responds to the Non-3GPP access gateway/ePDG connection establishment failure, the response message carries the information of the PGW1, and indicates the redirection to the PGW1; in the S2c-DSMIPv6 scenario, the PGW2 responds.
  • the UE connection fails to be established, and the response message carries the information of PGW1 and indicates to redirect to PGW1.
  • Step 508 The Non-3GPP access gateway /ePDG or UE is redirected to PGW1.
  • the Non-3GPP access gateway/ePDG establishes a PDN connection to the PGW1 according to the received PGW1 information and the redirection indication; in the S2c-DSMIPv6 scenario, the UE according to the received PGW1 The information and redirection instructions establish a PDN connection to PGW1.
  • Embodiment 5 the Non-3GPP access gateway/ePDG establishes a PDN connection to the PGW1 according to the received PGW1 information and the redirection indication; in the S2c-DSMIPv6 scenario, the UE according to the received PGW1 The information and redirection instructions establish a PDN connection to PGW1.
  • FIG. 6 Another processing flow of the method for performing PD connection in a multiple access scenario proposed by this embodiment is shown in FIG. 6. Specifically, the following steps are included:
  • Step 601 The UE initiates an initial attach procedure, and the mobility management entity selects PGW1 to establish a PDN connection on the 3GPP side.
  • the UE initially attaches and sends an Initial Attach message, and the mobility management entity selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the mobility management entity selects the PGW for the UE according to the default APN in the subscription data of the UE delivered by the HSS.
  • Step 602 The mobility management entity registers the information of the PGW1 (including the address or identifier of the PGW1) to the HSS through the registration process, and the HSS records the correspondence between the UE identifier, the APN information, and the PGW1 information.
  • Step 603 The UE selects the PGW2 through the Non-3GPP access gateway on the Non-3GPP side. Access the PDN connection of the same APN.
  • the UE initiates an initial attach procedure, and sends an Initial Attach message
  • the Non-3GPP access gateway selects a corresponding PGW for the UE according to the APN information carried in the Initial Attach message. If the APN information is not carried in the Initial Attach message sent by the UE, the Non-3GPP access gateway selects the PGW for the UE or returns the information of the default APN to the UE according to the default APN in the subscription data of the UE delivered by the HSS. The corresponding PGW.
  • Step 604 The PGW2 sends a registration request message to the HSS through the AAA server, requesting to register the information of the PGW2 (including the address or identifier of the PGW2).
  • Step 605 The HSS decides to reserve the PDN connection according to the configured priority access technology, and notifies the mobility management entity or the AAA server to initiate deletion of another access technology type PDN connection.
  • the HSS determines to reserve the PDN connection on the 3GPP side. Based on the result of the decision, the HSS sends the new subscription data of the UE (including the information of the PGW1) to the AAA server, AAA.
  • the server finds a PGW conflict, responds to PGW2, fails to register under the access technology, initiates deletion of the Non-3GPP side PDN connection, and performs step 506; if the Non-3GPP access technology is configured on the HSS, the HSS decision retains Non-3GPP.
  • the HSS On the side of the PDN connection, the HSS sends the new subscription data of the UE (including the information of the PGW2) to the mobility management entity, and the mobility management entity discovers the PGW conflict and initiates the deletion of the PDN connection on the 3GPP side.
  • Step 606 The PGW2 responds to the Non-3GPP access gateway or the UE, and the PDN connection establishment fails under the access technology, and notifies the failure reason.
  • the PDN connection can be established through the same PGW to ensure the unique PGW.
  • Sexuality in turn, can control parameters such as APN-AMBR to maintain business continuity.
  • the method if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • a plurality of instructions are used to make a computer device (which may be a personal computer, a server, and the storage medium includes: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM, a random access memory). Memory ), a variety of media such as a disk or a disc that can store program code.

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Abstract

本发明实施例提供一种多接入场景下执行分组数据网连接的方法。该方法包括:当UE在Non-3GPP侧发起PDN连接建立时,HSS接收Non-3GPP侧PGW2的注册请求消息,所述消息中携带所述PGW2的信息;如果所述PGW2的信息和所述UE在3GPP侧建立PDN连接时在所述HSS中注册的3GPP侧PGW1的信息不相同,所述HSS请求移动性管理实体更新3GPP侧的PDN连接;如果所述移动性管理实体拒绝更新所述3GPP侧的PDN连接,所述HSS拒绝所述PGW2的注册请求,并将所述UE的签约数据发送给AAA服务器,以便所述AAA服务器根据所述UE的签约数据对Non-3GPP侧的PDN连接进行处理,其中,所述UE的签约数据中携带有所述PGW1的信息。本发明实施例解决了现有技术中多接入场景下由于PGW的非唯一性而导致APN-AMBR等参数无法控制,进而影响业务连续性的问题。

Description

多接入场景下执行分组数据网连接的方法 技术领域
本发明实施例涉及通信技术领域, 并且更具体地, 涉及一种多接入场景 下执行分组数据网 ( Packet Data Network, 简称 PDN )连接的方法。 背景技术
第三代合作项目 ( 3rd Generation Partnership Project, 筒称 3GPP ) 为了 增强未来网络的竟争能力, 正在研究一种全新的演进网络, 包括演进的 UMTS陆地无线接入网( Evolved UMTS Terrestrial Radio Access Network, 简 称 E-UTRAN ), 用于实现所有与演进网络无线有关的功能; 移动性管理实体 ( Mobility Management Entity, 简称 MME ), 负责控制面的移动性管理, 包 括用户上下文和移动状态管理,分配用户临时身份标识等;服务网关( Serving Gateway, 简称 SGW ), 是 3GPP接入网络间的用户面锚点, 终止 E-UTRAN 的接口; 分组数据网络网关 ( Packet Data Network Gateway , 筒称 PGW ) , 是 3GPP接入网络和非 3GPP接入网络之间的用户面锚点, 终止和外部分组 数据网 ( Packet Data Network, 简称 PDN ) 的接口; 策略和计費规则功能实 体 ( Policy and Charging Rule Function, 简称 PCRF ), 用于策略控制决定和 流计费控制功能;归属签约用户服务器( Home Subscriber Server,简称 HSS ), 用于存储用户签约数据; UMTS 陆地无线接入网 (UMTS Terrestrial Radio Access Network,筒称 UTRAN )和 GSM/EDGE无线接入网( GSM/EDGE Radio Access Network, 筒称 GERAN ), 用于实现所有与现有 GPRS/UMTS网络中 无线有关的功能;服务通用分组无线业务支持节点( Serving GPRS Supporting Node, 简称 SGSN ), 用于实现 GPRS/UMTS网络中路由转发、 移动性管理、 会话管理以及用户信息存储等功能; 非 3GPP IP接入网络(Non-3GPP IP Access Network ), 主要是一些非 3GPP组织定义的接入网络, 如无线局域网 ( Wireless Local Area Network , 简称 WLAN )、 全球微波互联接入 ( Worldwide Interoperability for Microwave Access, 简称 Wimax )和码分多址 接入( Code Division Multiple Access, 简称 CDMA ) 等网络; 认证、 授权与 计费服务器( Authentication, Authorization and Accounting Server ,简称 AAA Server ), 用于对用户设备( User Equipment, 简称 UE )执行接入认证、 授权 和计费功能。 多接入技术是随着网络的演进而发^^来的一种接入技术, 筒单的说, 就是 UE可以同时接入多个不同类型的接入网 (例如同时接入 WLAN 网络 和 LTE网络), 通过运营商部署的一个或多个数据网关, 连接到不同或者相 同的数据网络 现有技术中, 当 UE 在两种不同接入技术下向同一 PDN 网络发起
Attach/PD 连接建立流程时,如果两次接入都发起初始附着( Initial Attach ), 则两种接入技术下的接入网关都会新选择 PGW, 不同接入技术下的接入网 关可能选择不同的 PGW。例如, UE在 3GPP侧已经建立了接入点名称( Access Point Name, 简称 APN )的 PDN连接,锚定在 PGWl ,并且把 PGWl和 APN 的绑定关系插入 HSS。 如果再在 Non-3GPP侧附着, 需要发起 Simultaneous Attach 流程, 此时 Non-3GPP 侧的接入网关根据 UE 发送的 APN 和 Simultaneous Attach消息, 从 HSS下发的签约数据中, 获取该 APN在 3GPP 侧附着的 PGW1信息, 然后向该 PGW1发起该 APN的附着。 但是, 如果 UE在 Non-3GPP侧附着的时候,发起的是 Initial Attach流程,接入网关此时 认为是 UE初次附着, 不会从 HSS下发的签约数据中选择 APN和 PGW1的 绑定关系, 而是接入网关为该 UE选择新的 PGW。 这样, 就可能会引起同 一个 APN在不同接入技术下, 附着在不同的 PGW上, 使得 APN-AMBR等 参数无法控制, 进而影响业务的连续性。
发明内容
本发明实施例提供一种多接入场景下执行分组数据网连接的方法, 能够 解决多接入场景下由于 PGW的非唯一性而导致 APN-AMBR等参数无法控 制, 进而影响业务连续性的问题。
一方面, 提供了一种多接入场景下执行分组数据网连接的方法, 包括: 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
如果所述 PGW2的信息和所述 UE在 3GPP侧建立 PDN连接时在所述
HSS中注册的 3GPP侧分组数据网关 PGW1的信息不相同, 所述 HSS请求 移动性管理实体更新 3GPP侧的 PDN连接;
如果所述移动性管理实体拒绝更新所述 3GPP侧的 PDN连接,所述 HSS 拒绝所述 PGW2的注册请求, 并将所述 UE的签约数据发送给认证、 授权与 计费 AAA 服务器, 以便所述 AAA 服务器根据所述 UE 的签约数据对
Non-3GPP侧的 PDN连接进行处理, 其中, 所述 UE的签约数据中携带有所 述 PGW1的信息。
另一方面,提供了一种多接入场景下执行分組数据网连接的方法,包括: 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
所述 HSS使用所述 PGW2的信息替换所述 UE在 3GPP侧建立 PDN连 接时在所述 HSS中注册的 3GPP侧分组数据网关 PGW1的信息;
所述 HSS 向移动性管理实体发送签约信息更新请求消息, 请求更新所 述 UE的签约信息, 其中, 所述签约信息更新请求消息中携带所述 PGW2的 信息,以便所述移动性管理实体根据所述 PGW2的信息更新 3GPP侧的 PDN 连接。
另一方面,提供了一种多接入场景下执行分组数据网连接的方法,包括: 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
所述 HSS根据配置的接入技术的优先级, 决策保留 3GPP侧的 PDN连 接还是 Non-3GPP侧的 PDN连接, 并根据决策结果触发移动性管理实体或 者认证、 授权与计费 AAA服务器发起另一侧 PDN连接的删除。 本发明实施例提供的方法, 通过由网络侧进行判断, 控制 UE在多接入 场景下从不同接入网连接到相同 PDN 网络时, 能够通过同一个 PGW建立 PDN连接, 保证了 PGW的唯一性, 进而可以对 APN-AMBR等参数进行控 制, 保持业务的连续性。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对实施例或现有技 术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 性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1是根据本发明一个实施例的多接入场景下执行分組数据网连接的方 法的流程图;
图 2是根据本发明一个实施例的多接入场景下执行分组数据网连接的方 法的示意流程图;
图 3是根据本发明另一实施例的多接入场景下执行分组数据网连接方法 的示意流程图;
图 4是根据本发明另一实施例的多接入场景下执行分组数据网连接方法 的示意流程图;
图 5是根据本发明另一实施例的多接入场景下执行分组数据网连接方法 的示意流程图;
图 6是根据本发明另一实施例的多接入场景下执行分组数据网连接方法 的示意流程图。 具体实施方式
下面将结合本发明实施例中的附图 ,对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是 全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创 造性劳动前提下所获得的所有其他实施例, 都属于本发明保护的范围。
应注意, 本发明实施例中所述的 "接收"、 "发送" 可以表示直接的接收 或发送,也可以表示通过一个或多个中间网元 /装置间接的接收或发送,本发 明对此不作限制。 本发明实施例中的移动性管理实体对于 GERAN/UTRAN 网络来说, SGSN; 对于 E-UTRAN网络来说, 是 MME, 本发明对此不作限制。
本发明实施例中的 Non-3GPP接入网关可以为 Acess Gateway ( AGW ), 本发明对此不作限制。
为了解决现有技术中, 多接入场景下由于 PGW 的非唯一性而导致
APN-AMBR等参数无法控制, 进而影响业务连续性的问题。 本发明实施例 提出一种多接入场景下执行分组数据网连接的方法。 如图 1所示, 具体包括 以下步骤:
步骤 101 , 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建 立时, 归属签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的 注册请求消息, 所述消息中携带所述 PGW2的信息;
步骤 102,如果所述 PGW2的信息和所述 UE在 3GPP侧建立 PDN连接 时在所述 HSS中注册的 3GPP侧分组数据网关 PGW1的信息不相同, 所述
HSS请求移动性管理实体更新 3GPP侧的 PDN连接;
步骤 103,如果所述移动性管理实体拒绝更新所述 3GPP侧的 PDN连接, 所述 HSS拒绝所述 PGW2的注册请求, 并将所述 UE的签约数据发送给认 证、授权与计费 AAA服务器, 以便所述 AAA服务器根据所述 UE的签约数 据对 Non-3GPP侧的 PDN连接进行处理, 其中, 所述 UE的签约数据中携带 有所述 PGW1的信息。
可选地, 所述移动性管理实体拒绝更新所述 3GPP侧的 PDN连接具体 包括:
当所述移动性管理实体确定所述 UE在所述 3GPP侧仍保持 PDN连接 时, 拒绝更新所述 3GPP侧的 PDN连接; 或者
当所述移动性管理实体确定所述 UE在所述 3GPP侧没有去附着时, 拒 绝更新所述 3GPP侧的 PDN连接; 或者
所述移动性管理实体向所述 UE询问是否更新所述 3GPP侧的 PDN连 接, 如果所述 UE拒绝更新, 则所述移动性管理实体拒绝更新所述 3GPP侧 的 PDN连接。 可选地,所述 AAA 务器根据所述签约数据对 Non-3GPP侧的 PDN连 接进行处理, 具体包括: 所述 AAA服务器根据所述签约数据中携带的 PGW1的信息, 确定所述 PGW1和所述 PGW2不相同, 其中, 所述 AAA服务器中保存有 PGW2的信 息; 所述 AAA服务器通知所述 PGW2注册失败, 以便所述 PGW2通知所述 UE在 Non-3GPP侧的 PDN连接建立失败,并删除所述 Non-3GPP侧的 PDN 连接; 或者,
所述 AAA服务器根据所述签约数据中携带的 PGW1的信息, 确定所述 PGW1和所述 PGW2不相同, 其中, 所述 AAA服务器中保存有 PGW2的信 息; 所述 AAA服务器根据所述签约数据中携带的 PGW1 的信息, 在所述 Non-3GPP侧发起 PGW的重定向。
可选地, 所述 AAA服务器根据所述签约数据中携带的 PGW1的信息, 在所述 Non-3GPP侧发起 PGW的重定向, 具体包括:
在 S2a/S2b 场景下, 所述 AAA服务器将所述 PGW1 的信息通过所述 PGW2发送给 Non-3GPP接入网关, 由所述 Non-3GPP接入网关建立到所述 PGW1的 PDN连接;
在 S2c场景下, 所述 AAA服务器将所述 PGW1的信息通过所述 PGW2 发送给 UE, 由所述 UE建立到所述 PGW1的 PDN连接。
可选地, 所述方法还可以包括:
如果所述移动性管理实体同意更新所述 3GPP侧的 PDN连接, 则所述 移动性管理实体拆除所述 3GPP侧的 PDN连接, 并向所述 HSS返回更新所 述 3GPP侧的 PDN连接的响应消息, 所述 HSS根据接收到的所述响应消息 接受所述 PGW2的注册请求。
可选地, 所述移动性管理实体同意更新所述 3GPP侧的 PDN连接, 具 体包括: 时, 同意更新所述 3GPP侧的 PDN连接; 或者
当所述移动性管理实体确定所述 UE在所述 3GPP侧去附着时, 同意更 新所述 3GPP侧的 PDN连接; 或者
所述移动性管理实体向所述 UE询问是否更新所述 3GPP侧的 PDN连 接, 如果所述 UE同意更新, 则所述移动性管理实体同意更新所述 3GPP侧 的 PDN连接。
可选地, 本发明实施例还提出另一种多接入场景下执行分组数据网连接 的方法, 具体包括:
当用户设备 UE在 Non-3GPP侧发起分組数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
所述 HSS使用所述 PGW2的信息替换所述 UE在 3GPP侧建立 PDN连 接时在所述 HSS中注册的 3GPP侧分组数据网关 PGW1的信息;
所述 HSS 向移动性管理实体发送签约信息更新请求消息, 请求更新所 述 UE的签约信息, 其中, 所述签约信息更新请求消息中携带所述 PGW2的 信息,以便所述移动性管理实体^^据所述 PGW2的信息更新 3GPP侧的 PDN 连接。
可选地, 所述移动性管理实体根据所述 PGW2 的信息更新 3GPP侧的 PDN连接, 具体包括:
所述移动性管理实体检查本地记录的所述 UE的签约信息, 如果确定所 述 PGW1和所述 PGW2不相同, 则更新所述 3GPP侧的 PDN连接。
可选地, 本发明实施例还提出又一种多接入场景下执行分组数据网连接 的方法, 具体包括:
当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
所述 HSS根据配置的接入技术的优先级, 决策保留 3GPP侧的 PDN连 接还是 Non-3GPP侧的 PDN连接, 并根据决策结果触发移动性管理实体或 者认证、 授权与计费 AAA服务器发起另一侧 PDN连接的删除。
可选地, 所述 HSS根据配置的接入技术的优先级, 决策保留 3GPP侧的 PDN连接还是 Non-3GPP侧的 PDN连接, 并根据决策结果触发移动性管理 实体或者认证、授权与计费 AAA服务器发起另一侧 PDN连接的删除 , 具体 包括:
当所述 HSS上配置的是 3GPP接入技术优先时, 所述 HSS决策保留所 述 3GPP侧的 PDN连接, 并将所述 UE新的签约数据下发给所述 AAA服务 器, 由所述 AAA服务器发起所述 Non-3GPP侧 PDN连接的删除, 其中, 所 述新的签约数据中包括所述 PGW1的信息;
当所述 HSS上配置的是 Non-3GPP接入技术优先时, 所述 HSS决策保 留所述 Non-3GPP侧的 PDN连接,并将所述 UE新的签约数据下发给所述移 动性管理实体, 由所述移动性管理实体发起所述 3GPP侧 PDN连接的删除, 其中, 所述新的签约数据中包括所述 PGW2的信息。
为便于对本发明实施例的理解, 下面将结合附图以几个具体实施例为例 做进一步的解释说明, 且各个实施例并不构成对本发明实施例的限定。
实施例一
该实施例提出的一种多接入场景下执行 PD 连接的方法的处理流程如 图 2所示。 具体包括以下步骤:
步骤 201 , UE发起初始附着流程, 通过移动性管理实体(如 MME )选 择 PGW1在 3GPP侧建立 PDN连接。
具体的,UE初始附着发送 Initial Attach消息,移动性管理实体根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, 移动性管理实体根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW。
步骤 202, 移动性管理实体通过注册流程将 PGW1的信息(包括 PGW1 的地址或标识 ) 注册到 HSS, 由 HSS记录 UE标识, APN信息和 PGW1信 息的对应关系。
步骤 203, UE在 Non-3GPP侧通过 Non-3GPP接入网关 (例如 AGW ) 选择 PGW2建立访问相同 APN的 PDN连接。
具体的, UE发起初始附着流程, 发送 Initial Attach消息, Non-3GPP接 入网关根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, Non-3GPP接入网 关根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW或将缺省 APN的信息返回给 UE , UE选择相应的 PGW。
步骤 204, PGW2通过 AAA服务器向 HSS注册 PGW2的信息 (包括
PGW2的地址或标识), 由 HSS记录 UE标识, APN信息和 PGW2信息的对 应关系, 更新本地保存的 PGW的注册信息。
步骤 205, HSS根据保存的移动性管理实体的注册信息, 向所记录的移 动性管理实体发送签约信息更新消息, 请求更新 UE的签约信息, 所述签约 信息更新消息中携带 PGW2的信息。
步骤 206, 移动性管理实体检查签约信息, 如果 PGW更新, 判断与先 前建立的连接不同, 则发起 PDN连接删除流程, 将之前在 3GPP侧建立的 PDN连接删除, 并通知 UE删除原因。
步骤 207, 移动性管理实体根据收到的 PGW2的信息, 在 3GPP侧发起 到 PGW2的重定向流程。
需要说明的是, 如果两侧 ( 3GPP侧和 Non-3GPP侧)接入技术不允许
UE同时连接同一个 PDN网络, 该实施例也适用于 PGW1和 PGW2为同一 个 PGW时的场景。 实施例二
该实施例提出的一种多接入场景下执行 PDN连接的方法的另一处理流 程如图 3所示。 具体包括以下步骤:
步骤 301, UE发起初始附着流程, 通过移动性管理实体选择 PGW1在 3GPP侧建立 PDN连接。
具体的,UE初始附着发送 Initial Attach消息,移动性管理实体根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, 移动性管理实体根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW。
步骤 302, 移动性管理实体通过注册流程将 PGW1的信息(包括 PGW1 的地址或标识 ) 注册到 HSS, 由 HSS记录 UE标识, APN信息和 PGW1信 息的对应关系。
步骤 303 , UE在 Non-3GPP侧通过 Non-3GPP接入网关选择 PGW2建 立访问相同 APN的 PDN连接。
具体的, UE发起初始附着流程, 发送 Initial Attach消息, Non-3GPP接 入网关根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息 , Non-3GPP接入网 关根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW或将缺省 APN的信息返回给 UE , UE选择相应的 PGW。
步骤 304, PGW2通过 AAA服务器向 HSS发送注册请求消息, 请求注 册 PGW2的信息 (包括 PGW2的地址或标识)。
步骤 305 , HSS向移动性管理实体发送 PDN连接请求消息,携带 PGW2 的信息 (包括 PGW2的地址或标识), 请求更新 UE签约数据中的 PGW。 移动性管理实体收到该 PDN连接请求消息后, 如果发现 UE仍有连接, 则向 HSS回响应消息, 拒绝更新; 或者,
可选地, 移动性管理实体收到该 PDN连接请求消息后, 可以发起网络 侧设备(例如, 移动性管理实体自身、 短消息中心或者后台服务器等) 向 UE的询问 (如移动性管理实体通过信令向 UE询问, 或者移动性管理实体 通过短消息设备向 UE询问),是否更新该 PDN连接的 PGW,如果 UE拒绝, 则移动性管理实体向 HSS回响应消息, 拒绝更新, HSS收到该响应消息后, 执行步骤 306;如果 UE同意,则移动性管理实体拆除 3GPP侧的 PDN连接。
步骤 306, HSS根据收到的移动性管理实体的响应消息, 向 PGW2返回 注册响应消息, 拒绝 PGW2 的本次注册请求, 并将 UE的签约数据 (包含 UE标识、 APN和 PGW1的对应关系)下发给 AAA服务器, AAA服务器根 据收到的 UE的签约数据,发现 PGW冲突,向 PGW2回响应消息,通知 PGW2 注册失败, PGW2根据该注册失败响应消息, 执行步骤 307。
可选地, HSS 也可以将 3GPP 侧的 PGW1 携带给 AAA 服务器, 在 Non-3GPP侧进行 PGW的重定向。
具体来说, 该重定向流程包括: S2a/S2b-PMIP场景下, AAA服务器将 3GPP侧的 PGW1标识通过 PGW2携带给 Non-3GPP接入网关, Non-3GPP 接入网关向 3GPP侧的 PGW1进行 PMIP的绑定; S2c场景下, AAA服务器 将 3GPP侧的 PGW1标识通过 PGW2携带给 UE,由 UE向 3GPP侧的 PGW1 进行 CMIP的绑定。
步骤 307, PGW2响应 Non-3GPP接入网关 /ePDG或者 UE连接建立失 败, 并通知失败原因。
具体地, S2a/S2b-PMIP场景下, PGW2响应 Non-3GPP接入网关或 ePDG 连接建立失败, Non-3GPP接入网关或 ePDG响应 UE连接建立失败, 携带 失败原因值; S2c-DSMIPv6 场景下, PGW2 直接向 UE发响应消息, 通知 UE连接建立失败, 在响应消息中携带失败原因值。
需要说明的是, 如果两侧 ( 3GPP侧和 Non-3GPP侧)接入技术不允许 UE同时连接同一个 PDN网络, 该实施例也适用于 PGW1和 PGW2为同一 个 PGW时的场景。 但是, 在该场景下, 不进行 PGW的重定向。 实施例三 该实施例提出的一种多接入场景下执行 PD 连接的方法的另一处理流 程如图 4所示。 具体包括以下步骤:
步骤 401 , UE发起初始附着流程, 通过移动性管理实体选择 PGW1在 3GPP侧建立 PDN连接。
具体的,UE初始附着发送 Initial Attach消息,移动性管理实体根据 Initial
Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, 移动性管理实体根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW。
步骤 402, 移动性管理实体通过注册流程将 PGW1的信息(包括 PGW1 的地址或标识 ) 注册到 HSS, 由 HSS记录 UE标识, APN信息和 PGW1信 息的对应关系。
步骤 403, UE在 Non-3GPP侧通过 Non-3GPP接入网关选择 PGW2建 立访问相同 APN的 PDN连接。
具体的, UE发起初始附着流程, 发送 Initial Attach消息, Non-3GPP接 入网关根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, Non-3GPP接入网 关根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW或将缺省 APN的信息返回给 UE , UE选择相应的 PGW。
步骤 404, PGW2通过 AAA服务器向 HSS发送注册请求消息, 请求注 册 PGW2的信息 (包括 PGW2的地址或标识)。
步骤 405, HSS向移动性管理实体发送 PDN连接请求消息, 向移动性 管理实体查询是否需要继续保持原 3GPP侧 PDN连接。 如果移动性管理实 体发现 UE已经去附着 ( detach ) (如, 移动性管理实体通过向 UE发起寻呼 流程发现 UE已经 detach ), 则向 HSS响应不保留连接, 并拆除 3GPP侧的 PDN连接, HSS根据该响应消息, 按正常流程接受 PGW2的注册请求; 如 果移动性管理实体发现 UE没有 detach, 则向 HSS响应保留连接, HSS执行 步骤 406。
步骤 406, HSS将 UE的签约数据(包含 3GPP侧的 PGW1信息)下发给 AAA服务器, AAA服务器发现 PGW冲突, 响应 PGW2注册失败。
步骤 407, PGW2响应 Non-3GPP接入网关 /ePDG或者 UE连接建立失 败, 并通知失败原因。 具体地, S2a/S2b-PMIP场景下, PGW2响应 Non-3GPP接入网关或 ePDG 连接建立失败, Non-3GPP接入网关或 ePDG响应 UE连接建立失败, 携带 失败原因值; S2c-DSMIPv6 场景下, PGW2 直接向 UE发响应消息, 通知 UE连接建立失败, 在响应消息中携带失败原因值。
需要说明的是, 如果两侧 ( 3GPP侧和 Non-3GPP侧)接入技术不允许
UE同时连接同一个 PDN网络, 该实施例也适用于 PGW1和 PGW2为同一 个 PGW时的场景。 实施例四
该实施例提出的一种多接入场景下执行 PD 连接的方法的另一处理流 程如图 5所示。 具体包括以下步骤:
步骤 501, UE发起初始附着流程, 通过移动性管理实体选择 PGW1在 3GPP侧建立 PDN连接。
具体的,UE初始附着发送 Initial Attach消息,移动性管理实体根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, 移动性管理实体根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW。
步骤 502, 移动性管理实体通过注册流程将 PGW1的信息(包括 PGW1 的地址或标识 ) 注册到 HSS, 由 HSS记录 UE标识, APN信息和 PGW1信 息的对应关系。
步骤 503 , UE在 Non-3GPP侧通过 Non-3GPP接入网关选择 PGW2建 立访问相同 APN的 PDN连接。
具体的, UE发起初始附着流程, 发送 Initial Attach消息, Non-3GPP接 入网关根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息 , Non-3GPP接入网 关根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW或将缺省 APN的信息返回给 UE , UE选择相应的 PGW。
步骤 504, PGW2通过 AAA服务器向 HSS发送注册请求消息, 请求注 册 PGW2的信息 (包括 PGW2的地址或标识)。
步骤 505, HSS向移动性管理实体发送 PDN连接请求消息, 向移动性 管理实体查询是否需要继续保持原 3GPP侧 PDN连接。 如果移动性管理实 体发现 UE已经 detach (如, 移动性管理实体通过向 UE发起寻呼流程发现 UE已经 detach ), 则向 HSS响应不保留连接, 并拆除 3GPP侧的 PDN连接, HSS根据该响应消息, 按正常流程接受 PGW2的注册请求; 如果移动性管 理实体发现 UE没有 detach, 则向 HSS响应保留连接, HSS执行步骤 506。
步骤 506, HSS响应 AAA服务器注册失败, AAA服务器响应 PGW2注 册失败, 所述响应消息中携带 PGW 1的信息, 并指示重定向到 PGW1。
步骤 507, PGW2响应 Non-3GPP接入网关 /ePDG或者 UE连接建立失 败。
具体地, S2a/S2b-PMIP场景下, PGW2响应 Non-3GPP接入网关 /ePDG 连接建立失败,所述响应消息中携带 PGW1的信息,并指示重定向到 PGW1; S2c-DSMIPv6场景下, PGW2响应 UE连接建立失败, 所述响应消息中携带 PGW1的信息, 并指示重定向到 PGW1。
步骤 508 , Non-3GPP接入网关 /ePDG或者 UE重定向到 PGW1。
具体地, S2a/S2b-PMIP场景下, Non-3GPP接入网关 /ePDG根据接收到 的 PGW1的信息和重定向指示, 建立到 PGW1的 PDN连接; S2c-DSMIPv6 场景下, UE根据接收到的 PGW1 的信息和重定向指示, 建立到 PGW1 的 PDN连接。 实施例五
该实施例提出的一种多接入场景下执行 PD 连接的方法的另一处理流 程如图 6所示。 具体包括以下步骤:
步骤 601, UE发起初始附着流程, 通过移动性管理实体选择 PGW1在 3GPP侧建立 PDN连接。
具体的,UE初始附着发送 Initial Attach消息,移动性管理实体根据 Initial Attach消息中携带的 APN信息 , 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, 移动性管理实体根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW。
步骤 602, 移动性管理实体通过注册流程将 PGW1的信息(包括 PGW1 的地址或标识 ) 注册到 HSS, 由 HSS记录 UE标识, APN信息和 PGW1信 息的对应关系。
步骤 603 , UE在 Non-3GPP侧通过 Non-3GPP接入网关选择 PGW2建 立访问相同 APN的 PDN连接。
具体地, UE发起初始附着流程, 发送 Initial Attach消息, Non-3GPP接 入网关根据 Initial Attach消息中携带的 APN信息, 为 UE选择相应的 PGW。 如果 UE发送的 Initial Attach消息中没有携带 APN信息, Non-3GPP接入网 关根据 HSS下发的 UE的签约数据中的缺省 APN为 UE选择 PGW或将缺省 APN的信息返回给 UE , UE选择相应的 PGW。
步骤 604, PGW2通过 AAA服务器向 HSS发送注册请求消息, 请求注 册 PGW2的信息 (包括 PGW2的地址或标识)。
步骤 605, HSS根据配置的优先的接入技术, 决策保留的 PDN连接, 并通知移动性管理实体或者 AAA服务器发起另一种接入技术类型 PDN连接 的删除。
具体地, 如果 HSS上配置的是 3GPP接入技术优先, 则 HSS决策保留 3GPP侧的 PDN连接, 基于该决策结果, HSS将 UE新的签约数据 (包含 PGW1的信息)下发给 AAA服务器, AAA服务器发现 PGW冲突,响应 PGW2 该接入技术下注册失败,发起 Non-3GPP侧 PDN连接的删除,执行步骤 506; 如果 HSS上配置的是 Non-3GPP接入技术优先,则 HSS决策保留 Non-3GPP 侧的 PDN连接, 基于该决策结果, HSS将 UE新的签约数据 (包含 PGW2 的信息)下发给移动性管理实体,移动性管理实体发现 PGW冲突,发起 3GPP 侧 PDN连接的删除。
步骤 606, PGW2响应 Non-3GPP接入网关或者 UE该接入技术下 PDN 连接建立失败, 并通知失败原因。 根据本发明实施例提供的方法, 通过由网络侧进行判断, 控制 UE在多 接入场景下从不同接入网连接到相同 PDN网络时,能够通过同一个 PGW建 立 PDN连接, 保证了 PGW的唯一性, 进而可以对 APN-AMBR等参数进行 控制, 保持业务的连续性。
本领域普通技术人员可以意识到, 结合本文中所公开的实施例描述的各 示例的单元及算法步骤, 能够以电子硬件、 或者计算机软件和电子硬件的结 合来实现。 这些功能究竟以硬件还是软件方式来执行, 取决于技术方案的特 定应用和设计约束条件。 专业技术人员可以对每个特定的应用来使用不同方 法来实现所描述的功能, 但是这种实现不应认为超出本发明的范围。 在本申请所提供的几个实施例中, 应该理解到, 所揭露的方法, 可以通 过其它的方式实现。 例如, 以上所描述的方法实施例仅仅是示意性的。
所述方法如果以软件功能单元的形式实现并作为独立的产品销售或使 用时, 可以存储在一个计算机可读取存储介质中。 基于这样的理解, 本发明 的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部 分可以以软件产品的形式体现出来, 该计算机软件产品存储在一个存储介质 中, 包括若干指令用以使得一台计算机设备(可以是个人计算机, 服务器, 述的存储介质包括: U盘、移动硬盘、只读存储器( ROM, Read-Only Memory )、 随机存取存储器(RAM, Random Access Memory ), 磁碟或者光盘等各种可 以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应所述以权利要求的保护范围为准。

Claims

权利要求
1、 一种多接入场景下执行分组数据网连接的方法, 其特征在于, 包括: 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
如果所述 PGW2的信息和所述 UE在 3GPP侧建立 PDN连接时在所述
HSS中注册的 3GPP侧分组数据网关 PGW1的信息不相同, 所述 HSS请求 移动性管理实体更新 3GPP侧的 PDN连接;
如果所述移动性管理实体拒绝更新所述 3GPP侧的 PDN连接,所述 HSS 拒绝所述 PGW2的注册请求, 并将所述 UE的签约数据发送给认证、 授权与 计费 AAA 服务器, 以便所述 AAA 服务器根据所述 UE 的签约数据对
Non-3GPP侧的 PDN连接进行处理, 其中, 所述 UE的签约数据中携带有所 述 PGW1的信息。
2、 如权利要求 1所述的方法, 其特征在于, 所述 AAA服务器根据所述 签约数据对 Non-3GPP侧的 PDN连接进行处理, 具体包括:
所述 AAA服务器根据所述签约数据中携带的 PGW1的信息, 确定所述 PGW1和所述 PGW2不相同, 其中, 所述 AAA服务器中保存有 PGW2的信 所述 AAA服务器通知所述 PGW2注册失败,以便所述 PGW2通知所述
UE在 Non-3GPP侧的 PDN连接建立失败,并删除所述 Non-3GPP侧的 PDN 连接。
3、 如权利要求 1所述的方法, 其特征在于, 所述 AAA服务器根据所述 签约数据对 Non-3GPP侧的 PDN连接进行处理, 具体包括:
所述 AAA服务器根据所述签约数据中携带的 PGW1的信息, 确定所述
PGW1和所述 PGW2不相同, 其中, 所述 AAA服务器中保存有 PGW2的信
所述 AAA服务器根据所述签约数据中携带的 PGW1 的信息, 在所述 Non-3GPP侧发起 PGW的重定向。
4、 如权利要求 3所述的方法, 其特征在于, 所述 AAA服务器根据所述 签约数据中携带的 PGW1的信息,在所述 Non-3GPP侧发起 PGW的重定向, 具体包括:
在 S2a/S2b 场景下, 所述 AAA服务器将所述 PGW1 的信息通过所述 PGW2发送给 Non-3GPP接入网关, 由所述 Non-3GPP接入网关建立到所述 PGW1的 PDN连接;
在 S2c场景下, 所述 AAA服务器将所述 PGW1的信息通过所述 PGW2 发送给 UE, 由所述 UE建立到所述 PGW1的 PDN连接。
5、 如权利要求 1所述的方法, 其特征在于, 所述移动性管理实体拒绝 更新所述 3GPP侧的 PDN连接具体包括:
当所述移动性管理实体确定所述 UE在所述 3GPP侧仍保持 PDN连接 时, 拒绝更新所述 3GPP侧的 PDN连接; 或者
当所述移动性管理实体确定所述 UE在所述 3GPP侧没有去附着时, 拒 绝更新所述 3GPP侧的 PDN连接; 或者
所述移动性管理实体向所述 UE询问是否更新所述 3GPP侧的 PDN连 接, 如果所述 UE拒绝更新, 则所述移动性管理实体拒绝更新所述 3GPP侧 的 PDN连接。
6、 如权利要求 1所述的方法, 其特征在于, 所述方法还包括: 如果所述移动性管理实体同意更新所述 3GPP侧的 PDN连接, 则所述 移动性管理实体拆除所述 3GPP侧的 PDN连接, 并向所述 HSS返回更新所 述 3GPP侧的 PDN连接的响应消息, 所述 HSS根据接收到的所述响应消息 接受所述 PGW2的注册请求。
7、 如权利要求 6所述的方法, 其特征在于, 所述移动性管理实体同意 更新所述 3GPP侧的 PDN连接, 具体包括: 时, 同意更新所述 3GPP侧的 PDN连接; 或者
当所述移动性管理实体确定所述 UE在所述 3GPP侧去附着时, 同意更 新所述 3GPP侧的 PDN连接; 或者
所述移动性管理实体向所述 UE询问是否更新所述 3GPP侧的 PDN连 接, 如果所述 UE同意更新, 则所述移动性管理实体同意更新所述 3GPP侧 的 PDN连接。
8、 一种多接入场景下执行分组数据网连接的方法, 其特征在于, 包括: 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
所述 HSS使用所述 PGW2的信息替换所述 UE在 3GPP侧建立 PDN连 接时在所述 HSS中注册的 3GPP侧分组数据网关 PGW1的信息;
所述 HSS 向移动性管理实体发送签约信息更新请求消息, 请求更新所 述 UE的签约信息, 其中, 所述签约信息更新请求消息中携带所述 PGW2的 信息,以便所述移动性管理实体根据所述 PGW2的信息更新 3GPP侧的 PDN 连接。
9、 如权利要求 8所述的方法, 其特征在于, 所述移动性管理实体根据 所述 PGW2的信息更新 3GPP侧的 PDN连接, 具体包括:
所述移动性管理实体检查本地记录的所述 UE的签约信息, 如果确定所 述 PGW1和所述 PGW2不相同, 则更新所述 3GPP侧的 PDN连接。
10、一种多接入场景下执行分组数据网连接的方法,其特征在于, 包括: 当用户设备 UE在 Non-3GPP侧发起分组数据网 PDN连接建立时,归属 签约用户服务器 HSS接收 Non-3GPP侧分组数据网关 PGW2的注册请求消 息, 所述消息中携带所述 PGW2的信息;
所述 HSS根据配置的接入技术的优先级, 决策保留 3GPP侧的 PDN连 接还是 Non-3GPP侧的 PDN连接, 并根据决策结果触发移动性管理实体或 者认证、 授权与计费 AAA服务器发起另一侧 PDN连接的删除。
11、 如权利要求 10所述的方法, 其特征在于, 所述 HSS根据配置的接 入技术的优先级, 决策保留 3GPP侧的 PDN连接还是 Non-3GPP侧的 PDN 连接, 并根据决策结果触发移动性管理实体或者认证、 授权与计费 AAA服 务器发起另一侧 PDN连接的删除, 具体包括:
当所述 HSS上配置的是 3GPP接入技术优先时, 所述 HSS决策保留所 述 3GPP侧的 PDN连接, 并将所述 UE新的签约数据下发给所述 AAA服务 器, 由所述 AAA服务器发起所述 Non-3GPP侧 PDN连接的删除, 其中, 所 述新的签约数据中包括所述 PGW1的信息。
12、 如权利要求 10所述的方法, 其特征在于, 所述 HSS根据配置的接 入技术的优先级, 决策保留 3GPP侧的 PDN连接还是 Non-3GPP侧的 PDN 连接, 并根据决策结果触发移动性管理实体或者认证、 授权与计费 AAA服 务器发起另一侧 PDN连接的删除, 具体包括: 当所述 HSS上配置的是 Non-3GPP接入技术优先时, 所述 HSS决策保 留所述 Non-3GPP侧的 PDN连接,并将所述 UE新的签约数据下发给所述移 动性管理实体, 由所述移动性管理实体发起所述 3GPP侧 PDN连接的删除, 其中, 所述新的签约数据中包括所述 PGW2的信息。
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