WO2010124551A1 - Procédé et système pour préserver un identifiant de passerelle de réseau par paquets dans un scénario d'accès multiples - Google Patents

Procédé et système pour préserver un identifiant de passerelle de réseau par paquets dans un scénario d'accès multiples Download PDF

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Publication number
WO2010124551A1
WO2010124551A1 PCT/CN2010/071638 CN2010071638W WO2010124551A1 WO 2010124551 A1 WO2010124551 A1 WO 2010124551A1 CN 2010071638 W CN2010071638 W CN 2010071638W WO 2010124551 A1 WO2010124551 A1 WO 2010124551A1
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WIPO (PCT)
Prior art keywords
access
packet data
data network
hss
3gpp
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PCT/CN2010/071638
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English (en)
Chinese (zh)
Inventor
毕以峰
周晓云
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中兴通讯股份有限公司
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Publication of WO2010124551A1 publication Critical patent/WO2010124551A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection

Definitions

  • the present invention provides a method for saving a packet data network gateway identifier in a multiple access scenario, including: the user equipment passes through two access networks, that is, a first access network and a second access network.
  • the HSS/AAA server stores the identifier of the packet data network gateway when accessing a packet data network and establishing the same packet data network connection; the packet data network gateway detects that the user equipment accesses through the two access networks simultaneously And when the packet data network establishes the same packet data network connection, notifying the HSS/AAA server that the packet data network connection is in a multi-access state; after receiving the notification, the HSS/AAA server records the recorded location The access status of the packet data network connection is changed from a single access state to a multiple access state, and the identifier of the packet data network gateway is retained; when the access of one of the two access networks is released, The HSS/AAA server changes the recorded multi-access status to a single access state and retains the identity of the packet data network gateway.
  • the HSS/AAA server receives the release indication signaling and detects the recorded access status of the packet data network connection. When the status is single access, the identifier of the packet data network gateway is deleted.
  • the present invention further provides a storage system for a packet data network gateway identifier in a multiple access scenario, including a packet data network gateway and an HSS/AAA server, the home subscriber or an authentication and authorization billing server, And storing, when the user equipment accesses a packet data network connection through two access networks, that is, the first access network and the second access network, storing the packet data network gateway identifier; the packet data network gateway is set to: When detecting that the user equipment accesses the packet data network and establish the same packet data network connection through two access networks, notifying the HSS/AAA server that the packet data network connection is in a multi-access state; The HSS/AAA server is further configured to: after receiving the notification, change the recorded access status of the packet data network connection from a single access state to a multiple access state, and reserve the packet data network gateway Identifying; when the access of one of the two access networks is released, changing the recorded multiple access status to single access State, and identifying the reserved packet data network gateway.
  • FIG. 1 is a schematic diagram of an EPS system architecture in the prior art
  • FIG. 3 is a first flow chart of simultaneous access of a 3GPP access network and a non-3GPP access network in Embodiment 1;
  • FIG. 9 is a flowchart of a method for saving a P-GW identifier in Embodiment 4. Preferred embodiment of the invention
  • the 3GPP access network may be referred to as a first access network, and the non-3GPP access network may be referred to as a second access network; or the non-3GPP access network may be referred to as
  • the first access network refers to the 3GPP access network as the second access network.
  • the UE connects to the same PDN through the first access network and the second access network, and when the same PDN connection is established, the HSS/AAA server stores the packet data network gateway identifier; the UE releases the access network of the two access networks. Upon entering, the HSS/AAA server does not delete the P-GW identity, but continues to retain the P-GW identity.
  • the UE establishes the same PDN connection through two access networks, and simultaneously accesses one.
  • the HSS/AAA server records the access status of the PDN connection as a multi-access status; when the UE or the P-GW initiates the release of access to one of the two access networks, the HSS/AAA server detects it. After the previously accessed state of the recorded PDN connection is in the multiple access state, the access state of the PDN connection is changed to the single access state.
  • the HSS/AAA server detects that the previously accessed state of the PDN connection recorded is a single access state, and then deletes the P-GW identifier.
  • the HSS/AAA server can set the flag of the PDN connection access status, and change the PDN connection access status by changing the value of this flag. For example, a flag bit of 1 indicates a multi-access state; a flag bit of 0 indicates a single access state. It is also possible to store the access status of the current PDN connection by storing two or one P-GW identifiers. For example, the identity of the two P-GWs stored indicates a multi-access state; the identity of a P-GW is stored to indicate a single access state.
  • the packet data network gateway is configured to: notify the HSS/AAA server of the packet data when detecting that the user equipment accesses the packet data network and establish the same packet data network connection through two access networks simultaneously The network connection is in a multi-access state;
  • the HSS/AAA server is configured to save a packet data network gateway identifier when the user equipment accesses a packet data network connection through two access networks, that is, the first access network and the second access network; After the multiple access indication, changing the recorded access status of the packet data network connection from a single access state to a multiple access state, and retaining the identity of the packet data network gateway; When the access of an access network in the network is released, the recorded multiple access status is changed to a single access status, and the identifier of the packet data network gateway is retained; and the user equipment passes the mobility management unit and the service gateway.
  • the packet data network gateway initiates release of the access of the 3GPP access network, after receiving the notification request signaling sent by the mobility management unit; or; the user equipment passes the non-3GPP access network gateway and the The packet data network gateway initiates release of the non-3GPP access Network access, received
  • the HSS/AAA server can set the flag of the PDN connection access status, and change the PDN connection access status by changing the value of this flag. For example, a flag bit of 1 indicates a multi-access state; a flag bit of 0 indicates a single access state. It is also possible to store the access status of the current PDN connection by storing two or one P-GW identifiers. For example, the identity of the two P-GWs stored indicates a multi-access state; the identity of a P-GW is stored to indicate a single access state.
  • the process of the UE accessing a certain PDN through the 3GPP access network and the non-3GPP access network may be as shown in FIG. 3 (the UE first accesses the PDN through the non-3GPP access network, and then accesses the PDN through the 3GPP access network) 4 (the UE first accesses the PDN through the 3GPP access network, and then accesses the PDN through the non-3GPP access network (S2a mode)) and FIG. 5 (the UE first accesses the PDN through the 3GPP access network) And then access any of the connections shown by the non-3GPP access network (S2c mode) access to the PDN connection) Into the process.
  • FIG. 3, FIG. 4, and FIG. 5 is specifically described below:
  • Step 301 The UE accesses the EPS through the non-3GPP access network, and possibly related services are transmitted on the connection.
  • the HSS/AAA server has saved the P-GW identifier, and the default access is performed.
  • the status is a single access state;
  • Step 302 The UE sends an “attach request” signaling to the MME, requesting to access the EPS through the 3GPP access system.
  • Step 303 The UE completes access authentication, location update, and authorization operations through a 3GPP access network (MME).
  • MME 3GPP access network
  • steps 302 to 304 are UE-initiated attachment steps in the 3GPP access network. If the UE has completed the attachment in the 3GPP access network, the UE only initiates multiple access of another PDN connection in the 3GPP access network, then step 302 The "PDN Connection Setup Request" signaling is sent in the middle, and step 303 is not required.
  • Step 305 After receiving the “establish default bearer request” signaling sent by the MME, the S-GW sends “establish default bearer request” signaling (GTP) or “proxy binding update” signaling (PMIPv6) to the P- GW, requesting to establish a tunnel binding;
  • Step 306 After determining, according to the corresponding mechanism, the P-GW connection of the current UE is a multi-access situation, the P-GW sends a “P-GW address update request” signaling to the HSS/AAA server, and carries a “multiple access indication”;
  • Step 307 After receiving the "multiple access indication", the HSS/AAA server learns that the PDN connection status of the current UE is a multi-access situation, and records that the PDN connection status of the UE is a multi-access status, and maintains the saved P. - GW logo.
  • Step 308 The P-GW responds to the S-GW with "establish default bearer response” signaling (GTP) or "proxy binding response” (PMIPv6) signaling, and announces that the S-GW tunnel binding is completed.
  • Step 309 the S-GW responds to the MME with a "default bearer setup response";
  • Step 310 Perform radio bearer setup and bearer update operations between the UE and the MME.
  • the terminal has been attached to the EPS through the 3GPP access network and may have one or several traffic transmissions. Then, the terminal initiates an access request (based on the S2a interface) to the EPS through the trusted non-3GPP access network. After receiving the proxy binding update, the P-GW advertises that the HSS/AAA server is currently a multiple access scenario.
  • the specific access process includes the following steps:
  • Step 401 The UE accesses the EPS system through the 3GPP access network, and possibly related services are transmitted on the connection, where the S-GW and the P-GW establish a data channel through the GTP or the PMIPv6 protocol.
  • the process, the HSS/AAA server has saved the P-GW identity, and the default access state is a single access state;
  • Step 402 The UE performs a specific non-3GPP access network air interface link establishment operation with the non-3GPP access gateway.
  • Step 403 The UE completes an access authentication and authorization operation by using a non-3GPP access network.
  • Step 404 The UE initiates an attach request to the non-3GPP access network according to its specific manner.
  • the foregoing steps 402 to 404 are the UE-initiated attach procedure in the 3GPP access network. If the UE has completed attachment in the non-3GPP access network, the UE Only the multiple access of another PDN connection is initiated in the non-3GPP access network, then the "PDN Connection Setup Request" signaling is sent in step 402, and step 403 is not required.
  • Step 405 After receiving the attach request/PDN connection establishment request sent by the UE, the non-3GPP access gateway sends a “proxy binding update” message to the P-GW to request to establish a tunnel binding.
  • Step 407 after receiving the "multiple access indication", the HSS/AAA server learns the current UE
  • Step 408 The P-GW responds to the non-3GPP access gateway with "proxy binding acknowledgement” signaling, and announces Binding of the non-3GPP access gateway tunnel is completed;
  • Step 409 The UE implements successful attachment in the non-3GPP access network.
  • the UE accesses through the 3GPP access network first, and then accesses through the non-3GPP access network, which is different from the access method shown in FIG. 4.
  • the UE accesses the S2c interface of the non-3GPP access network, and the P-GW advertises that the HSS/AAA server is currently a multiple access scenario.
  • the specific access process includes the following steps: Step 501 to Step 503 and Step 401 in FIG. Step 403 is the same;
  • Step 504 The UE initiates an attach request to the non-3GPP access network according to its specific manner, and performs local address allocation, bootstrap, and the like;
  • step 504 initiates a non-3GPP access system specific "PDN connection request" signaling
  • Step 505 The UE sends a “binding update” message to the P-GW to request to establish a tunnel binding.
  • Step 506 After determining, according to the corresponding mechanism, the P-GW connection of the current UE is a multi-access situation, the P-GW sends a “P-GW address update request” signaling to the HSS/AAA server, and carries a “multiple access indication”;
  • Step 507 After receiving the "multiple access indication", the HSS/AAA server learns the current UE
  • the PDN connection status of the UE is recorded as a multi-access status, and the saved P-GW identifier is maintained;
  • Step 508 The P-GW sends a "Binding Confirmation" signaling to the UE, and announces that the UE tunnel binding is completed.
  • the UE accesses a PDN connection through the 3GPP access network and the non-3GPP access network.
  • the UE initiates the release of the 3GPP access network.
  • the process of entering includes the following steps:
  • Step 601 After the process shown in FIG. 3, FIG. 4 or FIG. 5, the UE simultaneously accesses a PDN through the 3GPP access network and the non-3GPP access network, and establishes the same PDN connection.
  • Step 602 The UE sends a detach request signaling to the MME through the 3GPP access network.
  • the foregoing step 602 is a detachment procedure initiated by the UE in the 3GPP access network, if the UE only wants to initiate a certain PDN in the 3GPP access network.
  • the removal of the connection, then the step is a "PDN connection deletion request"signaling;
  • Step 603 the MME sends a delete bearer request signaling to the S-GW;
  • Step 604 After receiving the delete bearer request signaling sent by the MME, the S-GW sends a delete bearer request signaling or a proxy binding update message to the P-GW, where the lifetime of the proxy binding update message is zero, indicating that the request is Delete the tunnel binding;
  • Step 605 The P-GW responds to the S-GW with a delete bearer response or a proxy binding update response, and notifies that the S-GW tunnel is unbound.
  • Step 606 The S-GW sends a delete bearer response signaling to the MME.
  • Step 607 The S-GW responds to the UE with a detachment response, and notifies that the attachment is successfully removed.
  • Step 608 The MME learns that the current UE deletes the connection from the 3GPP access network, sends an announcement request signaling to the HSS/AAA server, and the HSS/AAA server returns a response to the MME.
  • Step 609 After detecting that the recorded PDN connection access status of the UE is a multi-access state, the HSS/AAA server changes the PDN connection status of the UE to a single access state, and retains the P-GW identifier.
  • the HSS/AAA server detects that the access status of the PDN connection is a single access state, and then deletes the P-GW. logo.
  • the identifier of the correct P-GW can be obtained from the HSS/AAA server to ensure re-access or handover. Correct execution.
  • the foregoing embodiment 1 illustrates a scenario in which the UE initiates removal of access from the 3GPP access network after the UE accesses a certain PDN through the 3GPP access network and the non-3GPP access network.
  • the following describes the scenario in which the UE initiates the removal of access from the non-3GPP access network by using the second embodiment and the third embodiment.
  • the non-3GPP access network is based on the S2a interface
  • the non-3GPP access network is based on the S2c interface.
  • the default PDN connection status of the UE in the HSS/AAA server is a single access state, and the UE accesses the PDN through the second access network to implement the 3GPP access network and the non- The 3GPP access network is simultaneously linked to a certain PDN.
  • the P-GW notifies the HSS/AAA server that the PDN connection status of the UE is a multi-access state, and the HSS/AAA server saves the P-GW in the PDN connection.
  • the identity and current status are the multiple access status.
  • the HSS/AAA server After the UE initiates the multi-connection removal operation of the non-3GPP access network, the HSS/AAA server receives the "Update P-GW Address Request" message sent by the P-GW, and detects that the previous state of the PDN connection is a multi-access status. After that, only the multi-connection state is changed to the single access state without deleting the P-GW identity.
  • the HSS/AAA server can set the flag of the PDN connection access status, and change the PDN connection access status by changing the value of this flag. For example, a flag bit of 1 indicates a multi-access state; a flag bit of 0 indicates a single access state. It is also possible to store the access status of the current PDN connection by storing two or one P-GW identifiers. For example, the identity of the two P-GWs stored indicates a multi-access state; the identity of a P-GW is stored to indicate a single access state.
  • the UE completes simultaneous access through the 3GPP access network and the non-3GPP access network.
  • the process of PDN connection can also be any of the processes shown in Figure 3, Figure 4 or Figure 5.
  • the process for the UE to initiate the release of the non-3GPP access network access includes the following steps: Step 701: After the process shown in FIG. 3, FIG. 4 or FIG. 5, the UE accesses through the 3GPP. The network and the non-3GPP access network (through the S2a interface) simultaneously access a PDN to establish the same PDN connection; Step 702: The UE initiates a non-3GPP access network specific detach request through the non-3GPP access gateway;
  • the foregoing step 702 is a UE-initiated detach step in the second access network. If the UE only wants to initiate the removal of a certain PDN connection in the second access network, the step is a non-3GPP access system-specific "PDN". Connection delete request "signaling.
  • Step 703 After receiving the detach request/PDN connection deletion request sent by the UE, the non-3GPP access gateway sends a “proxy binding update” message to the P-GW, where the lifetime of the signaling is set to zero, and the request is deleted.
  • Step 704 The P-GW sends a P-GW address update request signaling to the HSS/AAA server.
  • Step 706 The P-GW responds to the non-3GPP access gateway with a "proxy binding acknowledgement" signaling, and announces that the non-3GPP access gateway tunnel debinding is completed.
  • Step 707 The UE successfully de-attaches in the non-3GPP access network.
  • the HSS/AAA server detects that the access status of the PDN connection is a single access state, and then deletes the P-GW identifier.
  • Step 901 After the process shown in FIG. 3, FIG. 4 or FIG. 5, the UE simultaneously accesses a PDN through the 3GPP access network and the non-3GPP access network, establishes the same PDN connection, and may have different service data. Transfer into the system;
  • Step 903 The P-GW sends a P-GW address update request signaling to the HSS/AAA server.
  • the HSS/AAA server defaults to access of the PDN connection.
  • the state is a single access state, and the P-GW identity is saved.
  • the HSS/AAA server detects that the recorded PDN connection access state is a single access state. , release access to the access network and delete the P-GW identity.
  • the HSS/AAA server can be reasonably notified, and the P-GW identifier can be stored or deleted correctly.
  • the P-GW identification operation is involved in the multiple access scenario, the system is guaranteed to operate normally.

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  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un système pour préserver un identifiant de passerelle de réseau de données par paquets (P-GW) dans un scénario d'accès multiples, qui comprend les étapes suivantes : lorsqu'un équipement utilisateur accède à un réseau de données par paquet via deux réseaux d'accès, c'est-à-dire simultanément via un premier réseau d'accès et via un second réseau d'accès, et établit des connexions avec le même réseau de données par paquets, un serveur d'abonné local(HSS)/serveur d'authentification, d'autorisation et de comptabilité (AAA) stocke un identifiant P-GW ; le premier réseau d'accès est un réseau d'accès de projet de partenariat de 3ième génération (3GPP), et le second réseau d'accès est un réseau d'accès non 3GPP ; ou le premier réseau d'accès est un réseau d'accès non 3GPP, et le second réseau d'accès est un réseau 3GPP ; lorsque l'accès via l'un des deux réseaux d'accès est libéré, le serveur HSS/AAA réserve l'identifiant P-GW. Dans ce procédé, le serveur HSS/AAA est averti de manière raisonnable et demande de stocker ou de supprimer correctement l'identifiant P-GW ; ce qui assure un fonctionnement normal du système lorsque l'identifiant est impliqué dans le scénario d'accès multiples.
PCT/CN2010/071638 2009-04-30 2010-04-08 Procédé et système pour préserver un identifiant de passerelle de réseau par paquets dans un scénario d'accès multiples WO2010124551A1 (fr)

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CN2009101361769A CN101730072B (zh) 2009-04-30 2009-04-30 在多接入场景下分组数据网络网关标识的保存方法及系统
CN200910136176.9 2009-04-30

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