WO2012113153A1 - Procédé et matériel permettant d'établir une connexion à un réseau à commutation par paquets (pdn) - Google Patents

Procédé et matériel permettant d'établir une connexion à un réseau à commutation par paquets (pdn) Download PDF

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Publication number
WO2012113153A1
WO2012113153A1 PCT/CN2011/071304 CN2011071304W WO2012113153A1 WO 2012113153 A1 WO2012113153 A1 WO 2012113153A1 CN 2011071304 W CN2011071304 W CN 2011071304W WO 2012113153 A1 WO2012113153 A1 WO 2012113153A1
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WO
WIPO (PCT)
Prior art keywords
gateway
packet data
data network
information
pdn connection
Prior art date
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PCT/CN2011/071304
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English (en)
Chinese (zh)
Inventor
于益俊
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 CN201180000800.8A priority Critical patent/CN102972084B/zh
Priority to PCT/CN2011/071304 priority patent/WO2012113153A1/fr
Publication of WO2012113153A1 publication Critical patent/WO2012113153A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a packet data network PDN connection establishing method and device. Background technique
  • the Evolved Packet System consists of an access system and an Evolved Packet Core Network (EPC). Access systems are generally classified into an Evolved Universal Territorial Radio Access Network (E-UTRAN) (also commonly referred to as a 3GPP access network) and a non-3GPP access network.
  • E-UTRAN Evolved Universal Territorial Radio Access Network
  • non-3GPP (non-3GPP) access network refers to an unconventional 3GPP access network technology, for example, accessing an EPC through a WiFi wireless network, and accessing an EPC through a Code Division Multiple Access (CDMA) wireless network. And access to EPC through the Worldwide Interoperability for Microwave Access (WiMax) wireless network.
  • WiMax Worldwide Interoperability for Microwave Access
  • the PDN connection is an access.
  • a data channel between a gateway network element (eg, eNodeB, ePDG, etc.), a Serving Gateway (S-GW), and a packet data network gateway (PDN Gateway; P-GW).
  • a gateway network element eg, eNodeB, ePDG, etc.
  • S-GW Serving Gateway
  • PDN Gateway Packet Data Network Gateway
  • the P-GW information is stored in a Home Subscriber Server (HSS), and when the UE moves between the E-UTRAN and the non-3GPP access network, the handover target is switched.
  • the side access gateway network element or Mobility Management Entity (MME) can obtain P-GW information from the HSS to build The PDN connection to the P-GW is established, that is, the PDN connection before the handover is resumed on the target side.
  • MME Mobility Management Entity
  • the P-GW information cannot be saved in the home subscriber server during the PDN connection establishment process (for example, the HSS dropped the packet due to congestion at the time), resulting in the HSS.
  • the P-GW information is obsolete, so that the target side access gateway network element or the MME obtains the P-GW information from the HSS in the handover process, which is outdated P-GW information.
  • the target side access gateway The network element or the mobility management entity establishes a PDN connection to the obsolete P-GW according to the obtained P-GW information, so that the PDN connection before the handover cannot be restored on the target side, resulting in service interruption.
  • the embodiments of the present invention provide a method and a device for establishing a PDN connection in a packet data network, so as to solve the problem that the HSS saves outdated P-GW information due to congestion or abnormality in the prior art, so that the target side access during the handover process is implemented.
  • the problem that the gateway network element or the MME obtains outdated P-GW information from the HSS, causing the PDN connection to fail to be established on the target side, causes service interruption.
  • An embodiment of the present invention provides a PDN connection establishment method for a packet data network, including: a first gateway receiving a PDN connection establishment request, where the first gateway is a gateway corresponding to the first packet data network gateway information stored in the home user server;
  • the first gateway acquires second packet data network gateway information, so that the second gateway establishes a PDN connection with the access gateway network element or the mobility management entity or the serving gateway, and the second packet data network gateway information is established before the handover process.
  • the second gateway of the PDN connection corresponds.
  • the embodiment of the invention further provides a packet data network gateway, including:
  • a receiving module configured to receive a packet data network PDN connection establishment request, where the packet data network gateway is a gateway corresponding to the first packet data network gateway information stored in the home user server, and a connection establishment module, configured to acquire the second packet data network
  • the gateway information is such that the second gateway establishes a PDN connection with the access gateway network element or the mobility management entity or the serving gateway, and the second packet data network gateway information corresponds to the second gateway that established the PDN connection before the handover procedure.
  • the method and device for establishing a PDN connection in a packet data network after the first gateway corresponding to the P-GW1 information stored in the home user server obtains the PDN connection establishment request, establishes a connection according to the pre-stored P-GW2 information.
  • the normal execution of the handover process between the 3GPP access network and the non-3GPP access network is ensured, and the service is guaranteed to be normal.
  • FIG. 1 is a flow chart of a first embodiment of a method for establishing a PDN connection of a packet data network according to the present invention
  • FIG. 2 is a flowchart of a PDN connection establishment process in a 3GPP network
  • FIG. 3 is a flow chart of a second embodiment of a method for establishing a PDN connection of a packet data network according to the present invention.
  • FIG. 4 is a flow chart of a third embodiment of a method for establishing a PDN connection of a packet data network according to the present invention.
  • FIG. 5 is a flowchart of a PDN connection establishment process in a non-3GPP network
  • FIG. 6 is a flow chart of a fourth embodiment of a method for establishing a PDN connection of a packet data network according to the present invention.
  • FIG. 7 is a flow chart of a fifth embodiment of a method for establishing a PDN connection of a packet data network according to the present invention.
  • FIG. 8 is a schematic structural diagram of a first embodiment of a packet data network gateway according to the present invention
  • FIG. 9 is a schematic structural diagram of a second embodiment of a packet data network gateway according to the present invention. detailed description
  • FIG. 1 is a flow chart of a first embodiment of a PDN connection establishment method for a packet data network according to the present invention. As shown in FIG. 1, the method includes:
  • the first gateway is configured to receive a PDN connection establishment request, where the first gateway is a gateway corresponding to the first packet data network gateway information stored in the home user server;
  • the first gateway acquires the second packet data network gateway information, so that the second gateway establishes a PDN connection with the access gateway network element or the mobility management entity or the serving gateway, and the second packet data network gateway information and the PDN are established before the handover process.
  • the connected second gateway corresponds.
  • the handover process involved in the embodiment of the present invention may be a process in which the UE switches from the 3GPP access network to the non-3GPP access network, and may also be a process in which the UE switches from the non-3GPP access network to the 3GPP access network.
  • the default PDN connection establishment process is performed, or the PDN connection establishment process is separately initiated after being attached to the access network, in the PDN connection establishment process.
  • the mobility management entity MME in the 3GPP access network or the packet data network gateway P-GW in the non-3GPP access network sends a notification request to the Home Location Register (HLR) /HSS, requesting the HLR/HSS to record the The PDN is connected to the corresponding P-GW information.
  • HLR Home Location Register
  • HLR Home Location Register
  • the gateway PG W information cannot return a notification response message to the mobility management entity MME or the P-GW, or the HLR/HSS sends a reject message to the mobility management entity or the packet data network gateway PG W, thereby enabling the mobility management entity or the packet data network.
  • Gateway The P-GW cannot successfully send the P-GW information to the HLR/HSS. In this case, the HLR/HSS stores the obsolete P-GW information (for example, the P-GW information successfully saved in the previous PDN connection establishment process).
  • the P-GW information includes a P-GW identity, which may be a P-GW address or a Fully Qualified Domain Name (FQDN) of the P-GW, and includes information related to the PDN connection.
  • the information such as the access point name (APN) may also include the identification information of the user equipment (User Equipment; UE), for example, an International Mobile Subscriber Identity (IMSI) or an international mobile device identifier. (International Mobile Equipment Identity, IM ⁇ ), etc.
  • IMSI International Mobile Subscriber Identity
  • IM ⁇ International Mobile Equipment Identity
  • the first gateway and the second gateway are both a packet data network gateway P-GW, and the first gateway is
  • the gateway pointed to by the obsolete P-GW information stored in the HLR/HSS, and the second gateway is the gateway that has established the PDN connection when the UE attaches to the 3GPP access network or the non-3GPP access network before the handover process, that is, The mobile management entity or the PDN-connected packet data network gateway (second gateway) should be sent to the gateway pointed to by the correct P-GW information in the HLR/HSS.
  • the access gateway network element in the non-3GPP access network (for example, an evolved Packet Data Gateway (ePDG)) Obtaining the stored P-GW information from the HLR/HSS, and initiating a proxy binding update message to the first gateway according to the first gateway pointed to by the P-GW information. That is, in this case, the first gateway in S101 receives the proxy binding update message (ie, the packet data network PDN connection setup request) sent by the access gateway network element, because the first gateway is not the UE attached to the 3GPP access network. The actual gateway of the PDN connection is established.
  • the proxy binding update message ie, the packet data network PDN connection setup request
  • the first gateway needs to obtain the second packet data network gateway information to establish a PDN connection between the access gateway network element and the second gateway.
  • the first gateway may directly initiate a proxy binding update message to the second gateway to establish a PDN connection between the access gateway network element and the second gateway; or the first gateway may also use the second packet data.
  • the network gateway information is sent to the access gateway network element, so that the access gateway network element initiates a proxy binding update message to the second gateway. If the UE switches from the non-3GPP access network to the 3GPP access network, the mobility management entity MME in the 3GPP access network acquires the stored P-GW information from the HLR/HSS, and according to the
  • the first gateway pointed to by the P-GW information initiates a session establishment request to the first gateway. That is, in this case, the first gateway in S101 receives the setup session request sent by the mobility management entity (ie, the packet data network PDN connection setup request), because the first gateway is not the UE attached to the non-3GPP access network to establish the PDN. The actual gateway connected, therefore, the first gateway needs to acquire the second packet data network gateway information to establish a PDN connection between the mobility management entity and the second gateway.
  • the mobility management entity ie, the packet data network PDN connection setup request
  • the first gateway may directly initiate a setup session request to the second gateway to establish a PDN connection of the mobility management entity to the second gateway; or the first gateway may also send the second packet data network gateway information to the mobile A management entity or a Serving Gateway (S-GW), so that the mobility management entity or the Serving Gateway (S-GW) initiates a session establishment request to the second gateway.
  • S-GW Serving Gateway
  • the second packet data network gateway information may be saved on the first gateway or stored in a Policy and Charging Rules Function (PCRF) network element.
  • the first gateway may obtain the second packet data network gateway information locally, or acquire the second packet data network gateway information by interacting with the PCRF.
  • PCRF Policy and Charging Rules Function
  • the access gateway network is established according to the pre-stored P-GW2 information.
  • the PDN connection of the second gateway corresponding to the P-GW2 information by the UE or the mobility management entity or the serving gateway. Ensure that the UE performs normal handover procedures between 3GPP and non-3GPP to ensure normal services.
  • the second packet data network gateway information mentioned in the previous embodiment may be stored on the first gateway, or on the PCRF.
  • the following provides a method for saving the second packet data network gateway information in the 3GPP network PDN connection establishment process.
  • the specific scenario may be a default PDN connection establishment performed by the UE during the attach process, or a separate PDN connection establishment process.
  • the first gateway is identified by P-GW1, and correspondingly, the P-GW1 information stored in the HLR/HSS is obsolete;
  • the second gateway is identified by P-GW2, and correspondingly, the second packet data network gateway information is P-GW2 information.
  • the method includes:
  • the MME sends a notification request (Notify Request) to the HLR/HSS.
  • the MME cannot carry the P-GW2 information in the notification request and send it to the HLR/HSS. That is, the P-GW1 information that has been obsolete is stored in the HLR/HSS.
  • the P-GW2 information includes the P-GW2 identifier, and may be information such as the P-GW2 address or the FQDN of the P-GW2, and may also include information such as the APN related to the PDN connection, and may further include the identifier information of the UE. For example: International Mobile Subscriber Identity (IMSI) or International Mobile Equipment Identity (IM ⁇ ).
  • IMSI International Mobile Subscriber Identity
  • IM ⁇ International Mobile Equipment Identity
  • the P-GW2 information is saved to the PCRF, and specifically includes S202-S205:
  • the MME sends a modify bearer request message to the P-GW2 by using the S-GW, where the modify bearer request message carries the indication information for saving the P-GW information.
  • the S-GW sends the modified bearer carrying the indication information of "save P-GW information" to the P-GW2.
  • Request Message Modify Bearer Request ) ;
  • the S-GW sends a Proxy Binding Update (PBU) carrying the indication information of "save P-GW information" to the P-GW2.
  • PBU Proxy Binding Update
  • the P-GW2 sends an IP-CAN Session Modify Request message to the PCRF.
  • P-GW2 will P-GW2 information according to the received indication information of "save P-GW information" (example For example, the P-GW2 identifier or the P-GW2 address, and/or the access point name (APN), and/or the identification information of the UE (IMSI or IM ⁇ , etc.) are included in the session modification request message and sent to the PCRF. Save it.
  • the P-GW2 identifier or the P-GW2 address, and/or the access point name (APN), and/or the identification information of the UE (IMSI or IM ⁇ , etc.) are included in the session modification request message and sent to the PCRF. Save it.
  • the PCRF sends an IP-CAN Session Modify Ack message to the P-GW2.
  • the P-GW2 sends a Create Session Response message or a Proxy Binding Ack (PBA) to the S-GW, and the S-GW sends a Create Session Response message to the MME.
  • PBA Proxy Binding Ack
  • Another feasible implementation manner along with S202 to S205 is: saving the P-GW2 information to the P-GW1, specifically including S206 and S207:
  • the MME sends a notification request message to the P-GW1 through the S-GW, where the notification request message carries P-GW2 information (for example: P-GW2 identifier or P-GW2 address, and/or access point name
  • API identification information
  • IMSI identification information
  • IM ⁇ identification information
  • the S-GW sends the foregoing notification request message carrying the P-G W2 information to the P-GW1;
  • the S-GW sends a PBU carrying the P-GW2 information to the P-GW1.
  • the P-GW1 After receiving the above notification request message, the P-GW1 saves the P-GW2 information on the P-GW1.
  • the P-GW1 sends a notification response message or a PBA to the S-GW, and the S-GW sends a notification response message to the MME.
  • the second packet data network gateway information (ie, P-GW2 information) may be stored in the PCRF or stored in the first gateway P-GW1 in the 3GPP network PDN connection establishment process, therefore, in the slave 3GPP access network
  • the first gateway P-GW1 can acquire the pre-stored second packet data network locally from the P-GW1 or from the PCRF.
  • the gateway information is established, thereby establishing a PDN connection between the access gateway network element and the second gateway.
  • FIG. 3 is a flowchart of a second embodiment of a PDN connection establishment method for a packet data network according to the present invention. As shown in FIG. 3, this embodiment provides a process for a UE to switch from a 3GPP access network to a non-3GPP access network. The UE performs a scenario of a handover attach process. The method includes: S301: A UE initiates an authentication authentication process to a non-3GPP access network.
  • the non-3GPP access gateway network element that interacts with the UE may be a network entity such as an ePDG or an MAG.
  • the non-3GPP access gateway network element performs an authentication and authentication process to the HSS/AAA server.
  • the Accounting Server provides the non-3GPP access gateway network element with the PDN connection related information of the U E stored before the handover process, that is, the P-GW1 information.
  • the P-GW1 information may include a P-GW identifier or a P-GW address, and may also include an APN.
  • the P-GW1 information may further include information such as identity information (such as IMSI, IM ⁇ , etc.) of the UE.
  • the UE sends an attach request message (this step is an optional step).
  • the non-3GPP access gateway network element sends a PBU message (that is, a packet data network PDN connection establishment request) to the P-GW1, where the PBU message carries a “handover attachment” indication.
  • a PBU message that is, a packet data network PDN connection establishment request
  • S307 is directly executed; if P-GW1 does not have the information of P-GW2 locally, S305 and S306 are executed first, and then S307 is executed.
  • the P-GW1 sends a session establishment request message to the PCRF (IP-CAN Session Create).
  • the session establishment request message carries the indication information, where the indication information is used to indicate that the P-GW2 information is obtained;
  • the P-GW1 After receiving the proxy binding update message, the P-GW1 sends a session establishment request message to the PCRF according to the "handover attachment" indication, where the message carries the UE identity (IMSI), the current access network type (RAT Type) of the UE, and the The PDN is connected to the corresponding access point name (APN). In addition, the message further includes indication information for indicating that the P-GW2 information is obtained. 5306.
  • the PCRF determines, according to the received session establishment request message, that the P-GW1 needs to obtain the P-GW2 information, and sends a session establishment response message (IP-CAN Session Create Ack) to the P-GW1, where the session establishment response message carries the P- GW2 information.
  • IP-CAN Session Create Ack IP-CAN Session Create Ack
  • the first gateway P-GW1 After acquiring the P-GW2 information sent by the PCRF, the first gateway P-GW1 triggers the access gateway network element to establish a PDN connection with the second gateway.
  • the method provided in this embodiment is that the P-GW1 sends the P-GW2 information to the access gateway network element, and the access gateway network element initiates a PDN connection establishment request to the P-GW2, S307 and S308.
  • the P-GW1 sends a PBA message to the non-3GPP access gateway network element, where the PBA message carries the P-GW2 information.
  • the non-3GPP access gateway network element sends a proxy binding update PBU message (ie, a PDN connection establishment request message) to the P-GW2 according to the received P-GW2 information.
  • the PBU message carries a "switching attachment" indication.
  • the PBU message may also carry the indication information of "update P-GW information".
  • the P-GW2 sends an IP-CAN Session Modify Request message to the PCRF.
  • PCRF sends a session modification response to P-GW2 (IP-CAN Session Modify
  • Ack A message carrying a Policy and Charging Control (PCC) rule.
  • the P-GW2 sends a PBA message to the non-3GPP access gateway network element.
  • the non-3GPP access gateway network element sends an attach accept message to the UE.
  • the P-GW2 sends a notification request (Notify Request) message to the HSS/AAA according to the indication information of the "update P-GW information" received in S308 or according to its own policy, and the notification request message carries the P-G W2 information.
  • Notify Request a notification request (Notify Request) message to the HSS/AAA according to the indication information of the "update P-GW information" received in S308 or according to its own policy, and the notification request message carries the P-G W2 information.
  • the HSS/AAA saves the P-GW2 information, and sends a notification response message (Notify Response) to the P-GW2.
  • S313 There is no sequence relationship between S313 and S312, and S313 can also be executed after S31 1.
  • 4 is a flowchart of a third embodiment of a method for establishing a PDN connection of a packet data network according to the present invention
  • the embodiment also provides a process for the UE to perform a handover attach process in the process of the UE switching from the 3GPP access network to the non-3GPP access network.
  • the scenario is different from the previous embodiment in that, in the previous embodiment, after the P-GW1 acquires the PG W2 information sent by the PCRF or obtains the PG W2 information according to the locally stored information, the P-GW 1 sends the P-GW2 information to the connection.
  • the access gateway network element initiates a PDN connection establishment request to the P-GW2.
  • the P-GW1 after acquiring the P-GW2 information sent by the PCRF, the P-GW1 directly initiates a PDN connection establishment request to the P-GW2. , that is, execute S407.
  • the method includes:
  • the P-GW1 forwards the PBU message to the P-GW2, where the message includes the address information of the non-3GPP access gateway network element and the "handover attachment" indication.
  • the above message may also carry the indication information of "update P-GW information".
  • the P-GW2 sends a session modification request to the PCRF.
  • the PCRF sends a session modification response to the P-GW2 (IP-CAN Session Modify).
  • the message carries the PCC rule.
  • the P-GW2 sends a PBA message to the non-3GPP access gateway network element.
  • the non-3GPP access gateway network element sends an attach accept message to the U E.
  • the P-GW2 sends a notification request (Notify Request) message to the HSS/AAA according to the indication information of the “update P-GW information” or the self-policy, and the notification request message carries
  • the HSS/AAA saves the P-GW2 information and sends a notification response message (Notify Response) to the P-GW2.
  • 2 to 4 illustrate a method of storing second packet data network gateway information during a 3GPP network PDN connection establishment process, and a PDN connection establishment procedure for handover from a 3GPP access network to a non-3GPP access network.
  • a method of saving the second packet data network gateway information during the non-3GPP network PDN connection establishment process, and a PDN connection establishment procedure for switching from the non-3GPP access network to the 3GPP access network will be described below.
  • a method for saving the second packet data network gateway information in the non-3GPP network PDN connection establishment process where the specific scenario may be the default PDN connection establishment performed by the UE during the attach process, or a separate PDN connection establishment. process.
  • the first gateway is identified by P-GW1, correspondingly, the HLR/HSS stores the obsolete P-GW1 information; the second gateway is identified by P-GW2, and correspondingly, the second group
  • the data network gateway information is the P-GW2 information.
  • the method includes:
  • S501 and P-GW2 send a notification request (Notify Request) to the HSS/AAA.
  • the S501 execution fails. For example: P - GW2 does not receive the "Notification Response" message, or receives the rejection message, so that P-GW2 cannot carry the P-GW2 information in the notification request message and send it to the HSS/AAA.
  • the P-GW2 information is saved to the PCRF, and specifically includes S502 and S503:
  • the P-GW2 sends an IP-CAN Session Modify Request message to the PCRF.
  • the P-GW2 carries the P-GW2 information in the session modification request message and sends it to the PCRF for storage.
  • the PCRF sends an IP-CAN Session Modify Ack message to the P-GW2.
  • Another feasible implementation manner along with S502-S503 is: saving the P-GW2 information to the P-GW1, specifically including S504 to S507:
  • the P-GW2 sends a notification request message to the non-3GPP access gateway network element, where the notification is requested.
  • the message carries the indication information of "update P-GW information".
  • the non-3GPP access gateway network element sends a notification request message to the P-GW1, where the notification request message carries P-GW2 information, where the P-GW2 information includes a P-GW2 identifier or a P-GW2 address, and may also include
  • the PDN is connected to the corresponding APN and the identification information of the user (for example, IMSI or IM ⁇ , etc.).
  • the P-GW1 After receiving the above message, the P-GW1 saves the P-GW2 information of the APN of the user (IMSI or IM ⁇ ).
  • the P-GW1 sends a notification response message to the non-3GPP access gateway network element.
  • the non-3GPP access gateway network element sends a notification response message to the P-GW2.
  • the second packet data network gateway information is the P-GW2 information in the non-3GPP network PDN connection establishment process
  • the information may be stored on the PCRF or stored locally in the first gateway P-GW1, and therefore, in the non-3GPP
  • the first gateway P-GW1 can obtain the pre-stored second packet data network gateway information locally from the P-GW1 or from the PCRF, thereby establishing a serving gateway (S-GW). Or a PDN connection from the mobility management entity to the second gateway.
  • FIG. 6 is a flowchart of a fourth embodiment of a PDN connection establishment method for a packet data network according to the present invention. As shown in FIG. 6, the embodiment provides a process for a UE to switch from a non-3GPP access network to a 3GPP access network. The UE performs a scenario of a handover attach process. The method includes:
  • the UE sends an attach request message ( Attach Request) to the MME, and the attach type is “Handover Attach”.
  • the MME sends an update location request message (Update Location Request) to the HLR/HSS.
  • Update Location Request Update Location Request
  • the HLR/HSS sends an update location response message to the MME (Update Location
  • the update location response message carries the PDN connection related to the UE stored before the handover procedure Information, ie P-GW1 information.
  • the P-GW1 information includes a P-GW identifier or a P-GW address, and may further include an APN, and may further include information such as identifier information (such as IMSI or IM ⁇ ) of the UE.
  • the MME selects the S-GW and the P-GW1 according to the "Handover Attachment" indication and the P-GW1 information provided by the HLR/HSS, and sends a Create Session Request message to the S-GW, where the message carries the "Handover Attachment". "Instructions.
  • the S-GW sends the above-mentioned session request message (Create Session Request) carrying the "handover attachment" indication to the P-GW1;
  • the S-GW sends a PBU message carrying the "Switch Attach" indication to the P-GW1.
  • the P-GW1 sends a session establishment request message (IP-CAN Session Create Request) to the PCRF, where the session establishment request message carries the indication information, where the indication information is used to indicate that the P-GW2 information is obtained.
  • IP-CAN Session Create Request IP-CAN Session Create Request
  • the PCRF determines, according to the received session establishment request message, that the P-GW1 needs to obtain the P-GW2 information, and sends a session establishment response message (IP-CAN Session Create Ack) to the P-GW1, where the session establishment response message carries the P- GW2 information.
  • a session establishment response message IP-CAN Session Create Ack
  • the trigger service gateway (S-GW) or the mobile management entity establishes a PDN connection with the second gateway.
  • the manner provided in this embodiment is that the P-GW1 sends the P-GW2 information to the serving gateway (S-GW) or the mobility management entity, and the serving gateway (S-GW) or the mobility management entity initiates the PDN connection establishment to the P-GW2. Request, S607 and S608.
  • the P-GW1 sends a Create Session Response message or a Create Session Reject message to the S-GW, or a PBA, where the message carries the P-G W2 information.
  • the S-GW may directly execute S608, establish a PDN connection to the P-GW2, or move to the P-GW2.
  • the mobile management entity forwards a setup session response message carrying the PG W2 information or establishes a session rejection message, and the mobility management entity selects a new service gateway S-GW according to the received P-GW2 information (the new service gateway may also be the same as the above).
  • the service gateway that forwards the message is the same network element, and sends a setup session request message to the new serving gateway S-GW to establish a PDN connection to the P-GW2, where the setup session request message carries a "handover attachment" indication and P-GW2 information.
  • S608 The S-GW sends a Create Session Request message to the P-GW2 according to the P-GW2 information received from the P-GW1 or the MME in S607.
  • the message carries the "switch attachment" indication.
  • the S-GW sends the above-mentioned session request message (Create Session Request) carrying the "handover attachment" indication to the P-GW2;
  • the S-GW sends a Proxy Binding Update (PBU) carrying the "Switch Attach" indication to the P-GW2.
  • PBU Proxy Binding Update
  • the P-GW2 sends an IP-CAN Session Modify Request message to the PCRF.
  • PCRF sends a session modification response to P-GW2 (IP-CAN Session Modify
  • the message carries the PCC rule.
  • S61 1 and P-GW2 send a session establishment response message to the S-GW (Create Session
  • the S-GW sends a setup session response message to the MME (Create
  • the message can carry P-GW2 information.
  • the MME sends an attach accept message to the UE.
  • the MME sends a notification request (Notify Request) message to the HLR/HSS according to the P-GW2 information received in S607 or S611, where the message carries the P-GW2 information.
  • Notify Request a notification request (Notify Request) message to the HLR/HSS according to the P-GW2 information received in S607 or S611, where the message carries the P-GW2 information.
  • the HLR/HSS records the P-GW2 information, and sends a notification response message (Notify Response) to the MME.
  • FIG. 7 is a flowchart of a fifth embodiment of a method for establishing a PDN connection of a packet data network according to the present invention
  • this embodiment also provides a process for the UE to perform a handover attach process in the process of the UE switching from the non-3GPP access network to the 3GPP access network.
  • the scenario is different from the previous embodiment in that, in the previous embodiment, after the P-GW1 acquires the P-GW2 information sent by the PCRF or obtains the P-GW2 information saved by itself, the P-GW1 sends the P-GW2 information to the serving gateway.
  • the P2W2 initiates a PDN connection establishment request by the serving gateway or the mobility management entity; in this embodiment, after the P-GW1 obtains the P-GW2 information sent by the PCRF or obtains the P-GW2 information saved by itself, The PDN connection establishment request is directly initiated to the P-GW2, that is, S707 is performed.
  • the method includes:
  • S701 ⁇ S706 is the same as the process of S601 ⁇ S606, and can be referred to the previous embodiment, and will not be described again.
  • the P-GW1 forwards a Create Session Request message or a PBU message to the P-GW2, where the message includes an address information of the S-GW and a “Handover Attachment” indication.
  • the P-GW2 sends an IP-CAN Session Modify Request message to the PCRF.
  • the PCRF sends an IP-CAN Session Modify Ack message to the P-GW2, where the message carries the PCC rule.
  • the P-GW2 sends a Create Session Response message or a PBA message to the S-GW, where the message carries the P-GW2 information, and the S-GW forwards the Create Session Response message to the MME.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (Random Access Memory, RAM) and so on.
  • FIG. 8 is a schematic structural diagram of a first embodiment of a packet data network gateway according to the present invention.
  • the packet data network gateway includes: a receiving module 11 and a connection establishing module 12; wherein: a receiving module 1 1 is configured to: Receiving a packet data network PDN connection establishment request, where the packet data network gateway is a gateway corresponding to the first packet data network gateway information stored in the home subscriber server;
  • the connection establishing module 12 is configured to obtain second packet data network gateway information, so that the second gateway establishes a PDN connection with the access gateway network element or the mobility management entity or the serving gateway, and the second packet data network gateway information and the handover process Corresponding to the second gateway that previously established the PDN connection.
  • FIG. 9 is a schematic structural diagram of a second embodiment of a packet data network gateway according to the present invention, as shown in FIG.
  • the packet data network gateway includes: a receiving module 11 and a connection establishing module 12;
  • the packet data network gateway may further include:
  • a storage module 13 configured to store second packet data network gateway information
  • the second packet data network gateway information stored in the storage module 13 is obtained from the notification request message sent by the access gateway network element or the mobility management entity via the serving gateway.
  • the second packet data network gateway information may also be stored in a policy and charging rule function network element PCRF, where the PCRF is obtained from a session modification request sent by the second gateway.
  • PCRF policy and charging rule function network element
  • connection establishing module 12 may include:
  • the sending unit 121 is configured to send a session request message to the PCRF, where the session request message carries indication information, where the indication information is used to indicate that the second packet data network gateway information is obtained, and the receiving unit 122 is configured to receive the The session response message returned by the PCRF, where the session response message carries the second packet data network gateway information, so that the second gateway establishes a PDN connection with the access gateway network element or the mobility management entity.
  • connection establishing module 12 may be specifically configured to: send to the second gateway
  • PDN connection establishment request Or sending the second packet data network gateway information to the access gateway network element or the serving gateway or the mobility management entity, so that the access gateway network element or the serving gateway or the mobility management entity is to the second The gateway sends the PDN connection setup request.
  • the packet data network gateway information includes a packet data network gateway identifier, and the packet data network gateway identifier includes: a packet data network gateway address or a full-name domain name FQDN information of the packet data network gateway, and may further include connecting to the packet data network gateway.
  • the associated access point name APN may also include identification information of the user equipment, such as IMSI or IMEI.
  • the packet data network gateway provided by the embodiment of the present invention corresponds to the PDN connection establishment method of the packet data network provided by the embodiment of the present invention.
  • the specific implementation process can be referred to the method embodiment. Narration.
  • the packet data network gateway provided in this embodiment, after the first gateway corresponding to the P-GW1 information stored in the home subscriber server obtains the PDN connection establishment request, establishes an access gateway network element or service according to the pre-stored P-GW2 information.
  • the PDN connection of the gateway or mobility management entity to the corresponding second gateway. Ensure that the UE performs the normal execution of the handover process between 3GPP and non-3GPP to ensure that the service is normal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé et du matériel permettant d'établir une connexion à un réseau à commutation par paquets (PDN). Ledit procédé se déroule de la manière suivante : une première passerelle reçoit une demande d'établissement de connexion à un PDN, cette première passerelle étant la passerelle qui correspond aux premières informations de passerelle pour PDN conservées par un serveur d'abonné de rattachement (HSS) ; la première passerelle obtient des secondes informations de passerelle pour PDN afin que la seconde passerelle établisse une connexion à un PDN à l'aide d'un élément de réseau de passerelle d'accès, d'une entité de gestion de la mobilité ou d'une passerelle de service, lesdites secondes informations de passerelle pour PDN correspondant à la seconde passerelle qui établit une connexion à un PDN avant le processus de transfert intercellulaire. Le procédé et le matériel permettant d'établir une connexion à un PDN qui sont décrits dans les modes de réalisation de la présente invention assurent la mise en œuvre normale de la procédure de transfert intercellulaire d'un UE entre un réseau d'accès 3GPP et un réseau d'accès non 3GPP, ainsi que le fonctionnement normal du service.
PCT/CN2011/071304 2011-02-25 2011-02-25 Procédé et matériel permettant d'établir une connexion à un réseau à commutation par paquets (pdn) WO2012113153A1 (fr)

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PCT/CN2011/071304 WO2012113153A1 (fr) 2011-02-25 2011-02-25 Procédé et matériel permettant d'établir une connexion à un réseau à commutation par paquets (pdn)

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