WO2010091632A1

WO2010091632A1 - Management method for packet data network gateway (pdn gw) information, related equipment and system

Info

Publication number: WO2010091632A1
Application number: PCT/CN2010/070584
Authority: WO
Inventors: 张艳平; 吴问付
Original assignee: 华为技术有限公司
Priority date: 2009-02-10
Filing date: 2010-02-09
Publication date: 2010-08-19
Also published as: CN101800969B; CN101800969A

Abstract

A management method for Packet Data Network GateWay (PDN GW) information is disclosed. The method includes the following steps: when the Packet Data Network (PDN) connection of a User Equipment (UE) in the current network is released, determining whether the Access Point Name (APN) corresponding to the released PDN connection has a PDN connection of said UE in other networks; if said APN has a PDN connection of said UE in other networks, transmitting a message to instruct not deleting the PDN GW information corresponding to said APN in the Home Subscriber Server (HSS).

Description

PDN GW information management method, related equipment and system

This application claims priority to Chinese Patent Application No. 200910007202.8, entitled "PDN GW Information Management Method, Related Equipment and Systems", filed on February 10, 2009, the entire contents of which are incorporated by reference. In this application.

Technical field

The present invention relates to the field of communication technologies, and in particular, to a PDN GW information management method, related devices, and systems.

Background technique

Referring to FIG. 1, the core network in the existing network mainly includes three logical functional entities: a mobility management network element, a serving gateway (S-GW), and a packet data network gateway (PDN GW), wherein The mobility management network element is responsible for non-access-strata (NAS) signaling and NAS signaling encryption, roaming, tracking, etc., and assigns user temporary identity, security functions, and the like. The S-GW is responsible for the local mobility anchor and the 3rd Generation Partnership Project (3 GPP) system for mobile error points and lawful interception related information; the PDN GW is responsible for policy enforcement and accounting Fees and lawful interception related functions. Home Subscriber Server (HSS) is used to store user subscription information.

In the prior art, a user equipment (User Equipment) that is accessed in a multiple access mode may have a PDN connection, and multiple PDN connection selections may be established on multiple networks, corresponding to an APN (Access Point Name). The same PDN GW, the PDN GW is registered in the HSS by the mobility management network element or the PDN GW itself, and the HSS stores the correspondence between the PDN GW and the 。.

After the UE releases the PDN connection of the network 1, the mobility management network element notifies the HSS to delete the corresponding PDN GW information. If the UE also establishes the PDN connection in the network 2 at this time, when the UE again obtains the PDN connection from the mobility management network. In the case of meta-access, since the PDN GW information corresponding to ΑΡΝ has been deleted, the mobility management network element may select a new PDN GW to establish a PDN connection for the UE. In this way, the same UE is the same, and the network side selects a different PDN GW for the UE. The APN AMBR (Aggregate Maximum Bit Rate) of the UE is for the APN granularity, and the same APN for the same UE. In the case of two PDN GWs, APN The scheduling of AMBR cannot be performed correctly.

Summary of the invention

The embodiment of the invention provides a PDN GW information management method, related device and system, which can

The HSS manages PDN GW information reasonably.

In view of this, the embodiments of the present invention provide:

A packet data network gateway PDN GW information management method, including:

When the user equipment UE is released in the PDN connection of the packet data network of the current network, it is determined that the UE is released.

The access point name corresponding to the PDN connection. Whether the APN has the PDN connection of the UE in other networks;

If the APN has a PDN connection of the UE in another network, a message is sent to indicate that the PDN GW information corresponding to the APN in the home subscriber server HSS is not deleted.

A method for managing PDN GW information, including:

When the packet data network PDN connection of the user equipment UE is released, the home subscriber server is subscribed.

The HSS receives a message indicating deletion of the PDN GW information;

The HSS deletes the PDN GW information according to the indication, determines the access type of the released PDN connection, and deletes the released PDN connection in the correspondence between the PDN GW information and the access type of each PDN connection of the UE. The access type, where the correspondence between the PDN GW information and the access type of each PDN connection of the UE is previously stored in the HSS.

A communication device, comprising:

a judging unit, configured to determine, when the user equipment UE is released on the packet data network PDN of the current network, whether the access point name APN corresponding to the released PDN connection has a PDN connection of the UE in another network;

And a sending unit, configured to: when the judgment result of the determining unit is yes, send a message to indicate no information.

An information management device, comprising:

a message receiving unit, configured to receive a message indicating deletion of the packet data network gateway PDN GW information when the packet data network PDN connection of the user equipment UE is released; a determining unit, configured to determine, according to the message that the PDN GW information is deleted, the access type of the released PDN connection;

a saving unit, configured to save a correspondence between the PDN GW information and an access type of each PDN connection of the UE;

The access type of the PDN connection.

A network system, including: a PDN GW and a mobility management network element, where

The PDN GW is configured to: when the user equipment UE is released in the packet data network PDN connection of the current network, determine whether the access point name APN corresponding to the released PDN connection has a PDN connection of the UE in another network; The APN has a PDN connection of the UE in another network, and sends a message to the mobility management network element to indicate that the PDN GW information corresponding to the APN in the home subscriber server HSS is not deleted;

The mobility management network element is configured to receive the message sent by the PDN GW, and determine that the PDN GW information corresponding to the APN in the HSS is not required to be deleted. DRAWINGS

1 is a diagram of a wireless evolution network architecture;

2 is a flowchart of a method for managing PDN GW information according to Embodiment 1 of the present invention.

3 is a signaling diagram of a PDN GW information management method according to Embodiment 2 of the present invention.

4 is a signaling diagram of a PDN GW information management method according to Embodiment 3 of the present invention.

FIG. 5 is a signaling diagram of a PDN GW information management method according to Embodiment 4 of the present invention.

6 is a signaling diagram of a PDN GW information management method according to Embodiment 5 of the present invention.

7 is a signaling diagram of a PDN GW information management method according to Embodiment 6 of the present invention.

8 is a flowchart of a method for managing PDN GW information provided in Embodiment 7 of the present invention.

9 is a signaling diagram of step J1 provided in Embodiment 7 of the present invention;

Figure 10 is a signaling diagram of step J2 provided in Embodiment 7 of the present invention;

11 is a flowchart of a method for managing PDN GW information according to Embodiment 8 of the present invention;

FIG. 12 is a structural diagram of a network device according to Embodiment 9 of the present invention; FIG. FIG. 13 is a structural diagram of an information management device according to Embodiment 10 of the present invention.

detailed description

Embodiment 1:

Referring to FIG. 2, a first embodiment of the present invention provides a method for managing PDN GW information, including: when a UE releases a PDN connection of a current network, determining that a released packet data network PDN is connected, if the APN exists in another network. The PDN connection of the UE sends a message indicating that the PDN GW information corresponding to the APN in the HSS is not deleted.

The execution body of the method may be a UE or a PDN GW.

Specifically, the sending the message indicating that the PDN GW information corresponding to the APN in the HSS is not deleted may be: sending a message carrying the first indication information to the mobility management network element, where the first indication information is used to indicate that the HSS is not deleted. The PDN GW information corresponding to the APN, where the first indication information may be the valued cell or the judgment cell in the subsequent embodiment, for example, the valued cell is a Delete Indication Cell, and the value 1 indicates Deleting the PDN GW information corresponding to the APN in the HSS;

If the APN does not have the PDN connection of the UE in the other network, the mobile management network element may send a message carrying the second indication information, where the second indication information is used to indicate the deletion.

The PDN GW information corresponding to the APN in the HSS, the second indication information may be the valued cell in the subsequent embodiment, for example, the value-added cell is a Delete Indication message, and the value of 0 indicates that the HSS is deleted. The PDN GW information corresponding to the APN in the middle.

The first embodiment of the present invention determines whether the APN corresponding to the released PDN connection has a PDN connection in another network, and if yes, sends a message to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted, so that the UE is in the current network. After the PDN connection is released, if the UE still has a PDN connection of the same APN in another network, the HSS does not delete the information of the PDN GW corresponding to the APN.

Embodiment 2:

Referring to FIG. 3, a second embodiment of the present invention provides a method for managing PDN GW information, where the method includes:

B1. The UE sends a PDN connection release request to the mobility management network element. Solution 1: In this step, the UE determines whether there is a PDN connection of the same APN of the UE in the other bearer network, for example, the non-3GPP network, and if yes, indicates that the PDN GW information corresponding to the APN in the HSS is not deleted, if no And indicating that the PDN GW information corresponding to the APN in the HSS is deleted;

In the second embodiment and the subsequent embodiments, the PDN connection release request may carry a valued cell, and a value indicates that the PDN GW information corresponding to the APN in the HSS is deleted, and another value is used to indicate that the HSS is not deleted. The PDN GW information corresponding to the APN, for example, the deletion indication, the Delete Indication cell, and the value of 0 indicates that the PDN GW information corresponding to the APN in the HSS is deleted, and the value of 1 indicates that the PDN corresponding to the APN in the HSS is not deleted. GW information;

Or, if there is a PDN connection of the same APN of the UE in other bearer networks, then

The PDN connection release request carries the judgment cell to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted. Otherwise, the judgment cell is not carried in the PDN connection release request.

B2: The mobility management network element sends a delete bearer request to the S-GW, and the S-GW sends a delete bearer request to the PDN GW; if the proxy mobile IP (PMIP) protocol is between the S-GW and the PDN GW, The S-GW sends a proxy binding request message to the PDN GW.

B3. The PDN GW sends a delete bearer response to the S-GW, and the S-GW sends a delete bearer response to the mobility management network element. If the S-GW and the PDN GW are PMIP, the PDN GW sends a proxy tie to the S-GW. Confirm the message.

Solution 2: If the UE does not determine whether there is a PDN connection of the same APN of the UE in the other bearer network, the sent PDN connection release request does not indicate whether to delete the PDN GW information corresponding to the APN in the HSS, that is, if not If the UE indicates that the mobility management network element deletes the PDN GW information corresponding to the APN in the HSS, in this step, the PDN GW determines whether the APN corresponding to the PDN connection of the UE has a PDN connection of the UE in other bearer networks, if Yes, indicating that the PDN GW information corresponding to the APN in the HSS is not deleted, and if not, the PDN GW information corresponding to the APN in the HSS may be deleted.

In the second embodiment and the subsequent embodiments, the value of the PDN GW corresponding to the APN in the HSS is deleted, and another value is used to indicate that the HSS in the HSS is not deleted. PDN GW information corresponding to the APN, such as the delete indication Delete In the case of the Indication cell, the value of 0 indicates that the PDN GW information corresponding to the HS in the HSS is deleted, and the value of 1 indicates that the PDN GW information corresponding to the 中 in the HSS is not deleted;

Or, if there is a PDN connection of the UE in the other bearer network, the bearer response carries the judgment cell to indicate that the PDN GW information corresponding to the UI in the HSS is not deleted, otherwise, the bearer response is deleted. The judgment cell is not carried in the middle.

Β 4. The mobility management network element sends a radio bearer release request to the access network element, and the access network element sends a radio bearer release request to the UE.

B5. The UE and the access network element release the radio bearer, and send a radio bearer release response to the mobility management network element.

B6, determining whether a cell indicating that the PDN GW information corresponding to the APN in the HSS is not deleted is received in the step B1 or B3 (for example, the Delete Indication cell is 1, or the PDN connection release request or the deletion bearer response carries the judgment letter) Element), if yes, does not send a message requesting to delete the PDN GW information to the HSS, and ends the process; otherwise, the mobility management network element sends a notification message to the HSS (as shown in FIG. 3), the message is a request to delete the PDN The message of the GW information is used to request the HSS to delete the PDN GW information corresponding to the APN.

B7. The HSS sends a notification response message to the mobility management network element.

In the second embodiment of the present invention, the UE or the PDN GW determines whether the PDN connection of the UE exists in the other network by determining whether the APN corresponding to the PDN connection of the released UE is in the other network, to determine whether the PDN GW information stored in the HSS needs to be deleted, if If the result is yes, the mobility management network element is not deleted from the PDN GW information corresponding to the APN in the HSS, and the PDN GW information is erroneously deleted when the PDN connection exists in the other network, so that the subsequent UE is again removed from the mobility management network element. When accessing, the mobility management network element can still establish a PDN connection for the UE by using the PDN GW to ensure that the same UE is served by the same APN, and the network side uses the same PDN GW to serve the UE, thereby ensuring that the scheduling of the APN AMBR is correctly performed.

Embodiment 3:

Referring to FIG. 4, a third embodiment of the present invention provides a PDN GW information management method, where the method includes:

Cl, the UE sends a PDP (Packet Data Protocol) to the mobility management network element. Context) Deactivate the request.

In this step, the UE determines whether there is a PDN connection of the same APN of the UE in the other bearer network, for example, the non-3GPP network, and if yes, indicates that the PDN GW information corresponding to the APN in the HSS is not deleted, and if not, may indicate Delete the PDN GW '&. corresponding to the APN in the HSS.

In the third embodiment, the PDN context deactivation request may carry the valued cell to indicate whether to delete the PDN GW information corresponding to the APN in the HSS, or if the PDN of the same APN of the UE exists in the other bearer network. The connection carries the judgment cell in the PDP context deactivation request to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted. Otherwise, the judgment cell is not carried in the context deactivation request.

C2—C5 is the same as B2 - B5.

C6. The mobility management network element sends a PDP context deactivation accept message to the UE.

C7, determining whether a cell indicating that the PDN GW information corresponding to the APN in the HSS is not deleted is received in step C1 or C3 (for example, the Delete Indication cell is 1, or the PDP context deactivation request or the deletion bearer response carries the judgment Cell), if yes, does not send a message requesting to delete the PDN GW information to the HSS, and ends the process; otherwise, the mobility management network element sends a notification message to the HSS (as shown in FIG. 4), the message is requested to be deleted. The message of the PDN GW information is used to request the HSS to delete the PDN GW information corresponding to the APN.

C8. The HSS sends a notification response message to the mobility management network element.

In the third embodiment of the present invention, the UE or the PDN GW determines whether the PDN connection of the UE exists in the other network by determining whether the APN corresponding to the PDN connection of the released UE is in the other network, to determine whether the PDN GW information stored in the HSS needs to be deleted, if If the result is yes, the mobility management network element is not deleted from the PDN GW information corresponding to the APN in the HSS, and the PDN GW information is erroneously deleted when the PDN connection exists in the other network, so that the subsequent UE is again removed from the mobility management network element. When accessing, the mobility management network element can still establish a PDN connection for the UE by using the PDN GW to ensure that the same UE is served by the same APN, and the network side uses the same PDN GW to serve the UE, thereby ensuring that the scheduling of the APN AMBR is correctly performed.

Embodiment 4: Referring to FIG. 5, a fourth embodiment of the present invention provides a method for managing PDN GW information, where the method includes:

The D1 and the PDN GW send a delete bearer request to the mobility management network element through the S-GW, where the delete bearer request carries the identifier of the PDN connection that needs to be released.

In this step, the PDN GW determines whether the APN corresponding to the PDN connection of the UE has the PDN connection of the UE in the other bearer network, and if yes, indicates that the PDN GW information corresponding to the APN in the HSS is not deleted, and if not, the deletion may be indicated. The PDN GW information corresponding to the APN in the HSS.

In the fourth embodiment, the value-added cell may be carried in the delete bearer request to indicate whether to delete the PDN GW information corresponding to the APN in the HS S, or if the PDN connection of the same APN of the UE exists in the other bearer network. And deleting the bearer request carrying the judgment cell to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted, otherwise, the determining cell is not carried in the delete bearer request.

D2. The mobility management network element sends a PDP context deactivation request to the UE.

D3. The UE sends a PDP context deactivation acceptance to the mobility management network element.

In the step D1, the PDN GW may not determine whether the APN corresponding to the PDN connection of the UE has the PDN connection of the UE in the other bearer network, and does not delete the bearer request to indicate whether to delete the PDN GW information corresponding to the APN in the HSS. , can be in this step:

The UE determines whether there is a PDN connection of the same APN of the UE in the other bearer network, and if yes, indicates that the PDN GW information corresponding to the APN in the HSS is not deleted, and if not, may indicate to delete the PDN GW information corresponding to the APN in the HSS. .

In this step, the PDN context deactivation acceptance carries the value-added cell to indicate whether to delete the PDN GW information corresponding to the APN in the HSS, or if there is a PDN connection of the same APN of the UE in other bearer networks, Then, the PDN context deactivation acceptance carries the judgment cell to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted, otherwise, the judgment cell is not carried in the PDP context deactivation acceptance.

D4. The mobility management network element sends a delete bearer response to the S-GW, and the S-GW sends a delete bearer response to the PDN GW. D5. If there is a radio bearer, the mobility management network element initiates a radio bearer release procedure, and the mobility management network element sends a radio bearer release request to the access network element, and the access network element sends a radio bearer release request to the UE.

D6. The UE and the access network element release the radio bearer, and send a radio bearer release response to the mobility management network element.

D7. Determine whether a cell indicating that the PDN GW information corresponding to the APN in the HSS is not deleted is received in step D1 or D3 (for example, the Delete Indication cell is 1, or the bearer request is deleted or the PDP context is deactivated and accepted. Cell), if yes, does not send a message requesting to delete the PDN GW information to the HSS, and ends the process; otherwise, the mobility management network element sends a notification message to the HSS (as shown in FIG. 5), the message is requested to be deleted. The message of the PDN GW information is used to request the HSS to delete the PDN GW information corresponding to the APN.

D8. The HSS sends a notification response message to the mobility management network element.

It should be noted that the binding revocation request can be adopted in D1 of this embodiment, and the binding revocation response can be adopted in D4, which does not affect the implementation of the present invention.

In the fourth embodiment of the present invention, the UE or the PDN GW determines whether the PDN connection of the UE exists in the other network by determining whether the APN corresponding to the PDN connection of the released UE is in the other network, to determine whether the PDN GW information stored in the HSS needs to be deleted, if If the result is yes, the mobility management network element is not deleted from the PDN GW information corresponding to the APN in the HSS, and the PDN GW information is erroneously deleted when the PDN connection exists in the other network, so that the subsequent UE is again removed from the mobility management network element. When accessing, the mobility management network element still establishes a PDN connection for the UE by using the PDN GW to ensure that the same APN is the same as the UE, and the network side uses the same PDN GW to serve the UE, thereby ensuring that the scheduling of the APNAMBR is correctly performed.

Embodiment 5:

Referring to FIG. 6, a fifth embodiment of the present invention provides a PDN GW information management method, where the method includes:

The El, PDN GW sends a delete bearer request to the mobility management network element through the S-GW, where the delete bearer request carries the identifier of the PDN connection that needs to be released.

In this step, the PDN GW determines that the APN corresponding to the PDN connection of the UE is in another bearer network. If there is a PDN connection of the UE in the HSS, if yes, the PDN GW information corresponding to the APN in the HSS is not deleted, and if not, the PDN GW information corresponding to the APN in the HSS may be deleted, and the specific indication manner and the embodiment are Step D1 in the fourth is similar, and will not be described again here.

E2: The mobility management network element initiates a radio bearer release process, and the mobility management network element sends a radio bearer release message to the UE, where the message carries the bearer deactivation information sent to the UE.

E3. The UE and the access network element release the radio bearer, and send a radio bearer release response message to the mobility management network element.

E4. The UE sends a bearer deactivation response to the mobility management network element.

In the step E1, the PDN GW may not determine whether the APN corresponding to the PDN connection of the UE has the PDN connection of the UE in the other bearer network, and does not delete the bearer request to indicate whether the PDN GW information corresponding to the APN in the HSS needs to be deleted. After the UE receives the bearer deactivation information, the UE determines whether there is a PDN connection of the same APN of the UE in the other bearer network, and if yes, indicates that the PDN GW information corresponding to the APN in the HSS is not deleted, if not, Instructing to delete the PDN GW information corresponding to the APN in the HSS;

In this step, the value-added cell may be carried in the bearer deactivation response to indicate whether to delete the PDN GW information corresponding to the APN in the HSS, or if the PDN connection of the same APN of the UE exists in the other bearer network, The bearer deactivation response carries a judgment cell to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted. Otherwise, the judgment cell is not carried in the bearer deactivation response.

E5. The mobility management network element sends a delete bearer response to the S-GW, and the S-GW sends a delete bearer response to the PDN GW.

It should be noted that the proxy binding request may be adopted in E1 of the embodiment, and the proxy binding response may be adopted in E5, which does not affect the implementation of the present invention.

E6. Determine, in step E1 or E4, whether a cell indicating that the PDN GW information corresponding to the APN in the HSS is not deleted is received (for example, the Delete Indication cell is 1, or the bearer request is deleted or the bearer deactivation response carries the judgment signal. If yes, no message is sent to the HSS requesting to delete the PDN GW information, and the process ends; otherwise, the mobility management network element sends a notification message to the HSS (as shown in FIG. 6), the message is requesting to delete the PDN. GW information message to request HSS Delete the PDN GW information corresponding to the APN.

E7. The HSS sends a notification response message to the mobility management network element.

In the fifth embodiment of the present invention, the UE or the PDN GW determines whether the PDN connection of the UE exists in the other network by determining whether the APN corresponding to the PDN connection of the released UE is in the other network, to determine whether the PDN GW information stored in the HSS needs to be deleted, if If the result is yes, the mobility management network element is not deleted from the PDN GW information corresponding to the APN in the HSS, and the PDN GW information is erroneously deleted when the PDN connection exists in the other network, so that the subsequent UE is again removed from the mobility management network element. When accessing, the mobility management network element can still establish a PDN connection for the UE by using the PDN GW to ensure that the same UE is served by the same APN, and the network side uses the same PDN GW to serve the UE, thereby ensuring that the scheduling of the APN AMBR is correctly performed.

Example 6:

Referring to FIG. 7, a sixth embodiment of the present invention provides a PDN GW information management method. The difference between this embodiment and the foregoing embodiment is that the PDN GW determines that the APN corresponding to the PDN connection of the UE does not exist in other bearer networks. When the PDN of the UE is connected, the PDN GW sends a message to the authentication, authorization, and accounting (AAA) server to notify the AAA server to send a message requesting to delete the PDN GW information to the HSS. Including: HI, non-3GPP network PDN connection release proprietary process.

H2. The PDN GW determines whether the APN corresponding to the PDN connection of the UE has a PDN connection of the UE in the other bearer network. If not, sends an update PDN GW request to the AAA server to indicate that the PDN corresponding to the APN in the HSS is deleted. GW information.

The specific implementation manner may be: carrying the indication information in the update PDN GW request, where the indication information is used to indicate that the PDN GW information corresponding to the APN in the HSS is deleted.

H3. The AAA server sends a message for updating the PDN GW to the HSS, to instruct the HSS to delete the PDN GW information corresponding to the APN, and receive the response sent by the HSS.

H4. The AAA server sends an update PDN GW response to the PDN GW.

In the sixth embodiment of the present invention, the PDN GW determines whether the PDN GW information stored in the HSS needs to be deleted, if it is in another network, by determining whether the APN corresponding to the PDN connection of the released UE has the PDN connection of the UE in another network. If there is no PDN connection of the UE, then the indication The AAA server sends a message requesting to delete the PDN GW information to the HSS. Otherwise, the update PDN GW request is not sent, and the PDN GW information is erroneously deleted when the PDN connection exists in other networks, so that the subsequent UE accesses the mobility management network element again. The mobility management network element still establishes a PDN connection for the UE by using the PDN GW to ensure the same APN of the same UE, and the network side uses the same PDN GW to serve the UE, thereby ensuring that the scheduling of the APNAMBR is correctly performed.

Example 7:

Referring to FIG. 8 to FIG. 10, a seventh embodiment of the present invention provides a method for managing PDN GW information. The difference between this embodiment and the foregoing embodiment is as follows: The HSS saves the PDN GW information while saving the access type of the UE, and saves the PDN GW. Corresponding relationship between the information and each access type. Of course, the mapping between the PDN GW information and the access type includes saving the PDN GW information and the access type of the UE. The method includes:

Jl and the HSS obtain the access type of each PDN connection of the UE, save the PDN GW information, and save the access type of the UE, and save the correspondence between the PDN GW information and each access type.

J2, when a certain PDN connection of the UE is released, the mobility management network element sends a message indicating that the PDN GW information is deleted to the HSS, and the HSS determines the access type of the PDN connection released by the UE, and deletes the pre-stored PDN GW information corresponding to the The access type, that is, deleting the released PDN connection in the correspondence between the PDN GW information and each access type. If the access types corresponding to the PDN GW are all deleted, the HSS deletes the PDN GW information.

The release of the PDN connection of the UE may be caused by a mobility management network element or a PDN context deactivation initiated by a PDN GW or a UE, or a PDN connection release procedure.

Specifically, step J1 includes:

J11. The mobility management network element sends a notification message to the HSS, where the message carries the APN and PDN GW information, and the message may also carry the access type of the PDN connection of the UE.

J12. The HSS stores the correspondence between the APN and the PDN GW information and the access type, and may send a notification response message to the mobility management network element. If the access type of the UE is not carried in the step J11, the HSS may obtain the access type of the UE according to the identifier of the mobility management network element or the session identifier, such as the session ID, which is carried in the notification message.

The correspondence between the APN, PDN GW information and access type saved by the HSS is shown in Table 1: APN PDN GW information access type one

Access type two

Access type three

Table 1

Step J2 includes:

J21: When a certain PDN connection of the UE is released, the mobility management network element sends a notification message to the HSS, where the notification message is a message indicating that the PDN GW information is deleted, the PDN connection of the UE is notified to be released, and the HSS is requested to delete the PDN GW information. The message may carry the access type of the PDN connection released by the UE.

J22. If the access type of the PDN connection released by the UE is carried in the step J21, the HSS deletes the access type corresponding to the pre-stored PDN GW information. If the access type corresponding to the PDN GW information is deleted, the HSS deletes the PDN GW information. In this step, the HSS may send a notification response message to the mobility management network element. If the access type of the PDN connection released by the UE is not carried in the step J21, the HSS may obtain the access type of the PDN connection released by the UE, such as the mobility management network element address or the session ID carried in the message, so that the access type of the PDN connection released by the UE is obtained. The access type corresponding to the PDN GW information is deleted. For example, if the access type 1 is deleted, then Table 1 becomes Table 2:

Table 2

In the seventh embodiment of the present invention, the HSS saves the access type of the UE while saving the PDN GW information, and deletes the access type of the PDN connection released by the UE when the UE releases a certain PDN connection, and deletes the PDN GW corresponding to the PDN GW. After the PDN connection of the UE is released, if the UE still has a PDN connection on the other network, the HSS does not delete the information of the entire PDN GW, but only deletes the access type corresponding to the PDN GW. For the subsequent UE to access again, the PDN GW is still used to establish a PDN connection for the UE, and the same APN is ensured by the same UE. The network side uses the same PDN GW to serve the UE, thereby ensuring that the scheduling of the APNAMBR is correctly performed.

Example 8: Referring to FIG. 11, a method for managing PDN GW information is provided in Embodiment 8 of the present invention. The difference between the embodiment and the foregoing embodiment is as follows: The HSS separately stores the correspondence between the access type and the PDN GW information, and the method specifically includes:

The M1 and the HSS obtain the intrusion type of each PDN connection of the UE, and the corresponding relationship between the APN, the PDN GW information, and the access type is saved for a single access type in the intrusion type, specifically, the APN is saved, and the individual is correspondingly connected. The correspondence between the PDN GW information of the incoming type and the single access type.

M2, when a certain PDN connection of the UE is released, the mobility management network element sends a message indicating that the PDN GW information is deleted to the HSS, the HSS determines the access type of the PDN connection released by the UE, and deletes the PDN corresponding to the access type separately. Correspondence between the GW information and the access type.

Specifically, the step M1 includes:

Ml 1. The mobility management network element sends a notification message to the HSS, where the message carries the APN and PDN GW information, and the message may also carry the access type of the PDN connection of the UE.

The M12 and the HSS obtain the access type of the PDN connection of the UE, and store the corresponding relationship between the APN and the PDN GW information of the access type and the access type, as shown in Table 3:

table 3

If the access type of the PDN connection of the UE is not carried in the step M11, the HSS may obtain the access type of the PDN connection of the UE according to the identifier of the mobility management network element or the session identifier Session ID carried in the notification message. .

Specifically, step M2 includes:

M21: When a certain PDN connection of the UE is released, the mobility management network element sends a notification message to the HSS, where the notification message is a message indicating that the PDN GW information is deleted, the PDN connection of the UE is notified to be released, and the HSS is requested to delete the PDN GW information. The message may carry the access type of the PDN connection released by the UE.

M22, the HSS learns the access type of the PDN connection released by the UE, and deletes the corresponding access type. Corresponding relationship between the PDN GW information and the access type, for example, the HSS determines that the access type of the PDN connection released by the UE is the access type 1, then the HSS deletes the correspondence between the PDN GW information and the access type 1 at this time, Table 3 becomes Table 4:

If the M21 notification message carries the access type of the PDN connection released by the UE, the access type of the PDN connection released by the UE may be obtained according to the notification message, and if the notification message of the M21 does not carry the PDN connection released by the UE The access type, the HSS can obtain the access type of the PDN connection released by the UE according to the information such as the mobility management network element address or the session ID carried in the message, and does not affect the implementation of the present invention.

In the eighth embodiment of the present invention, the HSS saves a separate access type for an access type.

Corresponding relationship between the PDN GW information and the access type, after determining the access type of the PDN connection released by the UE, deleting the correspondence between the PDN GW information of the corresponding access type and the access type, and other access types The correspondence between the PDN GW and the PDN GW is retained. After the PDN connection of the UE is released, if the UE still has a PDN connection on the other network, the HSS does not delete the information of the entire PDN GW, but only deletes the corresponding PDN GW. The access type information is used to establish a PDN connection for the UE when the UE is re-accessed, and the PDN GW is still used to establish a PDN connection for the UE, and the same PDN is used by the network to serve the UE, thereby ensuring the correct execution of the APN AMBR scheduling. .

Example 9:

Referring to FIG. 12, a ninth embodiment of the present invention provides a communication device, where the network device may be a UE or a PDN GW, and specifically includes:

The determining unit 1201 is configured to: when the PDN connection of the current network is released by the UE, determine that the released PDN sending unit 1202 is configured to: when the determining result of the determining unit is yes, send a message to indicate that the HSS is not deleted. PDN GW information corresponding to the APN.

Specifically, the sending unit 1202 is configured to: when the determining result of the determining unit 1201 is YES, send a message carrying the first indication information to the mobility management network element, where the first indication information is used to indicate The PDN GW information corresponding to the APN in the HSS is not deleted, and when the determining result of the determining unit 1201 is NO, the message carrying the second indication information is sent to the mobility management network element, where the second indication information is used. The PDN GW information corresponding to the APN in the HSS is deleted.

Or the sending unit 1202, configured to: when the determining result of the determining unit 1201 is negative, send a message carrying the indication information to the AAA server, where the indication information is used to indicate deleting the PDN GW corresponding to the APN in the HSS. information.

The communication device provided by the ninth embodiment of the present invention determines whether the APN corresponding to the released PDN connection has a PDN connection in another network, and if yes, sends a message to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted, and the PDN GW information is avoided. When there is a PDN connection in another network, the PDN GW information is erroneously deleted, so that the subsequent UEs are re-accessed, the PDN GW is still used to establish a PDN connection for the UE, and the same APN is ensured by the same UE, and the network side uses the same PDN GW to serve the UE. To ensure that the scheduling of APN AMBR is performed correctly.

Example 10:

Referring to FIG. 13, the tenth embodiment of the present invention provides an information management device, where the information management device may be an HSS, and specifically includes:

The message receiving unit 1301 is configured to: when the PDN connection of the UE is released, receive a message indicating that the PDN GW information is deleted;

The determining unit 1302 is configured to determine, according to the message that the PDN GW information is deleted, the access type of the released PDN connection;

The saving unit 1303 is configured to save a correspondence between the PDN GW information and an access type of each PDN connection of the UE, where the correspondence between the PDN GW information and the access type of each PDN connection of the UE is saved, and the PDN is saved. GW information and access type of each PDN connection of the UE;

The first deleting unit 1304 is configured to delete the access type of the PDN connection determined by the determining unit 1302 saved in the saving unit 1303, that is, delete the access determined by the determining unit 1302 in the corresponding relationship. Types of.

The information management device further includes: a second deleting unit, configured to delete the PDN GW information when the access type corresponding to the PDN GW information saved by the saving unit 1303 has been deleted, that is, in the When all the access types corresponding to the PDN GW information in the corresponding relationship have been deleted, The PDN GW information is deleted.

Or the saving unit 1303 is configured to save a correspondence between the PDN GW information corresponding to the single access type and the single access type, for a single access type of the access types of the PDN connections of the UE. The first deleting unit 1304 is further configured to delete the PDN GW information corresponding to the access type of the PDN connection determined by the determining unit, that is, to delete the connection determined by the determining unit 1302 in the corresponding relationship. The PDN GW information corresponding to the incoming type.

In the tenth embodiment of the present invention, after determining the access type of the PDN connection released by the UE, the information management device deletes the access type corresponding to the pre-stored PDN GW information, so that the UE is released after the PDN connection of the network is released. If the UE still has a PDN connection on the other network, the HSS does not delete the PDN GW information, so that the subsequent UEs are re-accessed, the PDN GW is still used to establish a PDN connection for the UE, and the same PDN is used by the same PDN GW. The UE service ensures that the scheduling of the APN AMBR is performed correctly.

Example 11:

The eleventh embodiment of the present invention provides a network system, including: a PDN GW and a mobility management network element, where

The PDN GW is configured to: when the PDN connection of the current network is released by the UE, determine whether the APN corresponding to the released PDN connection has a PDN connection of the UE in another network; if the APN exists in another network, Transmitting a PDN connection of the UE to the mobility management network element to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted;

The mobility management network element is configured to receive the message sent by the PDN GW, and determine that the PDN GW information corresponding to the APN in the HSS is not required to be deleted.

In the eleventh embodiment of the present invention, the PDN GW determines whether the APN corresponding to the released PDN connection has a PDN connection in another network, and if yes, sends a message to the mobility management network element to indicate deletion of the PDN GW information saved in the HSS. When the PDN connection is erroneously deleted in the other network, the PDN GW information is erroneously deleted, so that the subsequent UE is again accessed from the mobility management network element, the mobility management network element still establishes a PDN connection with the PDN GW for the UE, and guarantees the same UE. On the same APN, the network side uses the same PDN GW to serve the UE, thus ensuring that the scheduling of the APN AMBR is performed correctly.

One of ordinary skill in the art can understand all or part of the steps in the method of implementing the above embodiments. It can be accomplished by a program to instruct related hardware, and the program can be stored in a computer readable storage medium such as a read only memory, a magnetic disk or an optical disk.

The foregoing description of the PDN GW information management method, the related device, and the system provided by the embodiments of the present invention are only used to help understand the method and core idea of the present invention. Meanwhile, for those skilled in the art, The present invention is not limited by the scope of the present invention.

Claims

Rights request

A packet data network gateway PDN GW information management method, comprising: when a user equipment UE is released in a PDN connection of a packet data network of a current network, determining release

2. The method of claim 1 wherein:

Determining whether the APN corresponding to the released PDN connection exists in other networks, whether the PDN connection of the UE exists includes:

The UE or the PDN GW determines whether the APN corresponding to the released PDN connection has a PDN connection of the UE in other networks.

3. The method of claim 1 wherein:

The sending the message to indicate that the PDN GW information corresponding to the APN in the home subscriber server HSS is not deleted includes:

The message carrying the indication information is sent to the mobility management network element, where the indication information is used to indicate that the PDN GW information corresponding to the APN in the HSS is not deleted.

4. The method according to claim 1, wherein the method further comprises:

And if the APN does not have the PDN connection of the UE in another network, send a message carrying the indication information to the mobility management network element or the authentication, authorization, and accounting AAA server, where the indication information is used to indicate deletion of the HSS. The PDN GW information corresponding to the APN.

A packet data network gateway PDN GW information management method, comprising: when a user equipment UE's packet data network PDN connection is released, the home subscription server server

The HSS receives a message indicating deletion of the PDN GW information;

6. The method of claim 5, wherein The message indicating that the PDN GW information is deleted is sent by the mobility management network element; determining the access type of the released PDN connection includes:

Obtaining an access type carried in the message indicating that the PDN GW information is deleted, and obtaining the access type as the access type of the released PDN connection;

Or,

Determining, according to the identifier of the mobility management network element, an access type of the released PDN connection; or

The session identifier Session ID carried in the message for deleting the PDN GW information is determined according to the indication, and the access type of the released PDN connection is determined.

The method according to claim 5 or 6, wherein the method further comprises: acquiring an access type of each PDN connection of the UE, and saving the PDN GW information and an access type of each PDN connection. Correspondence relationship.

8. The method according to claim 5, wherein the method further comprises:

When the access types corresponding to the PDN GW information have all been deleted, the PDN GW information is deleted.

9. A method according to claim 5 or 6, characterized in that

The method also includes:

Deleting PDN GW information corresponding to the access type of the released PDN connection separately;

Before deleting the access type of the released PDN connection in the correspondence between the PDN GW information and the access type of each PDN of the UE, the method further includes:

Obtaining an access type of each PDN connection of the UE, and storing, for a single access type of the access types of the PDN connections, PDN GW information corresponding to the single access type and the single access type Correspondence.

10. A communication device, comprising:

a sending unit, configured to: when the judgment result of the determining unit is yes, send a message to indicate that Information.

11. A communication device according to claim 10, characterized in that

The sending unit is configured to: when the determining result of the determining unit is yes, send a message carrying the indication information to the mobility management network element, where the indication information is used to indicate that the PDN GW corresponding to the APN in the HSS is not deleted. information.

12. A communication device according to claim 10, characterized in that

The sending unit is further configured to: when the determining result of the determining unit is negative, send a message carrying the indication information to the mobility management network element or the authentication, authorization, and accounting AAA server, where the indication information is used to indicate deletion. PDN GW information corresponding to the APN in the HSS.

13. An information management device, comprising:

a message receiving unit, configured to: when the packet data network PDN connection of the user equipment UE is released, receive a message indicating deletion of the packet data network gateway PDN GW information;

a determining unit, configured to delete, according to the indication, a message of deleting PDN GW information, determining an access type of the released PDN connection;

And a first deleting unit, configured to delete an access type of the PDN connection determined by the determining unit saved in the saving unit.

The information management device according to claim 13, further comprising: a second deleting unit, configured to: when the access types corresponding to the PDN GW information saved by the saving unit have all been deleted, The PDN GW information is deleted.

An information management device according to claim 13, wherein

The saving unit is configured to save a corresponding relationship between the PDN GW information corresponding to the single access type and the single access type, for a single access type of each access type of each PDN connection of the UE;

The first deleting unit is further configured to delete the PDN GW information corresponding to the access type of the PDN connection determined by the determining unit.

A network system, comprising: a packet data network gateway PDN GW and a mobility management network element, where The PDN GW is configured to: when the user equipment UE is connected to the PDN connection of the UE in the packet data network PDN of the current network; if the APN exists in the other network, the PDN connection of the UE is sent to the mobility management network element. a message, to indicate that the PDN GW information corresponding to the APN in the home subscription server RSS is not deleted;

The mobility management network element is configured to receive the message sent by the PDN GW, and determine that the PDN GW information corresponding to the APN in the HSS is not deleted.