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Method and system for reserving packet data gateway address information

A packet data network and address information technology, applied in digital transmission systems, data exchange networks, transmission systems, etc., can solve problems such as UE handover failure, address information transmission, and transmission, and achieve the effect of ensuring continuity and achieving simplicity.

Active Publication Date: 2009-08-05
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] When the HSS / HLR clears the PDN GW address information used by the UE, the UE is now in an unreachable state for the HSS / HLR. Since the PDN GW is the anchor point of the user plane, the remain unchanged, so when the PDN GW address information is deleted or the identifier is invalid, if the UE enters the non-3GPP access system from the 3GPP access system and performs handover in the non-3GPP access system, the non-3GPP access system The target Authentication Authorization and Accounting Server (AAA Server) needs to query the HSS / HLR for the PDN GW address information used by the UE, but because the address information has been deleted or the identifier is invalid, the HSS / HLR cannot The PDN GW address information used by the UE is passed to the AAA Server, causing the UE to be unable to access the network, thus causing the handover of the UE to fail in the non-3GPP access system
[0015] Similarly, when the UE switches back to the 3GPP access system from a non-3GPP access system, because the address information has been deleted or the identification is invalid, the UE is marked as unreachable in the HSS / HLR, and the HSS / IILR cannot The PDN GW address information used by the UE is passed to the target MME or target SGSN in the 3GPP access system, resulting in the UE being unable to access the network and also causing handover failure

Method used

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  • Method and system for reserving packet data gateway address information
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  • Method and system for reserving packet data gateway address information

Examples

Experimental program
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Embodiment 1

[0045] After the UE is detached from the MME, when the MME initiates a clear operation, the process of the method for retaining the PDN GW address information is as follows image 3 shown, including:

[0046] Step 301: the MME sends a clear user terminal request message to the HSS / HLR.

[0047] The purge UE request message is a Purge UE message, and the message carries an IMSI identifier, which is used to identify the identity of the purged user.

[0048] Step 302: The HSS / HLR receives the request message, and reserves the address information of the dynamic PDN GW used by the detachable UE or keeps the address information identifier of the PDN GW valid.

[0049] Step 303: The HSS / HLR sets the purge flag UE Purged for 3GPP PS.

[0050] Step 304: The HSS / HLR replies a clear confirmation message to the MME.

Embodiment 2

[0052] After the UE is deattached from the SGSN, the SGSN initiates a clear operation, and the process of the method for retaining the PDN GW address information is as follows Figure 4 shown, including:

[0053] Step 401: The SGSN sends a request message to clear the user terminal to the HSS / HLR.

[0054] The request message for clearing the user terminal is a Purge MS message, and the message carries an IMSI identifier, which is used to identify the identity of the user to be cleared.

[0055] Step 402: The HSS / HLR receives the request message, and reserves the address information of the dynamic PDN GW used by the detachable UE or keeps the address information identifier of the PDN GW valid.

[0056] Step 403: The HSS / HLR sets the purge flag UE Purged for 3GPP PS.

[0057] Step 404: HSS / HLR replies to the SGSN with a clear confirmation message

Embodiment 3

[0059] After the UE is detached from the AAA Server of the non-3GPP access system, when the AAA Server initiates a clear operation, the process of the method for retaining the PDN GW address information is as follows Figure 5 shown, including:

[0060] Step 501: The AAA Server sends a request message to clear the user terminal to the HSS / HLR.

[0061] The request message for clearing the UE is a Purge UE (NAI) message.

[0062] Step 502: The HSS / HLR receives the request message, and reserves the address information of the dynamic PDN GW used by the detachable UE or keeps the address information identifier of the PDN GW valid.

[0063] Step 503: The HSS / HLR sets the purge flag UE Purged for Non-3GPP.

[0064] Step 504: The HSS / HLR replies a clear confirmation message to the AAA Server.

[0065] It should be noted that the PDN GW address information in the above embodiments includes: the APN that the UE is using before detachment and the IP address of the corresponding PDN G...

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Abstract

The invention discloses a method for reserving address information of a packet data network gateway (PDN GW), comprising the steps: a user-signed server reserves the address information of the dynamic PDN GW used by a user terminal clear of attachment according to a request message for clearing the user terminal sent by a clear operation initiating end; and a clearing mark is set and an acknowledgment message for clearing the user terminal is returned to the clear operation initiating end. The invention also discloses a system for reserving the address information of the PDN GW simultaneously, and the system comprises the clear operation initiating end and the user-signed server. The method and the system for reserving the address information of the PDN GW do not delete the address information of the PDN GW used by the UE clear of attachment in a 3GPP access system or do not mark the address information of the PDN GW to be invalid, therefore, the UE can be continued to be accessed to a network according to the reserved address information of the PDN GW when being switched in a non-3GPP access system or switched from the non-3GPP access system back to the 3GPP access system, thus ensuring the continuity of businesses of the UE when being used among different networks. Simultaneously, the invention has simple realization.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method and system for retaining address information of a packet data network gateway. Background technique [0002] At present, with the development of communication technology, the third generation mobile communication technology has become increasingly mature. Universal Mobile Telecommunications System (UTMS) is a third-generation mobile communication system using Wideband Code Division Multiple Access (WCDMA) air interface technology. Similar structures for communication systems. However, considering the competitiveness of future networks, 3GPP proposed a newer evolved network architecture to meet the application requirements of mobile networks in the next ten years or longer, and this evolved network can ensure that 3G networks can be transformed from similar to second-generation The structure of the mobile communication system transitions smoothly to the evolution netwo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/02H04L29/06H04L12/56
Inventor 熊春山徐晖习建德沈宇希
Owner DATANG MOBILE COMM EQUIP CO LTD
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