CN100344168C - Method for ensuring consistency during context deleting of packet data protocol - Google Patents

Method for ensuring consistency during context deleting of packet data protocol Download PDF

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Publication number
CN100344168C
CN100344168C CNB031495907A CN03149590A CN100344168C CN 100344168 C CN100344168 C CN 100344168C CN B031495907 A CNB031495907 A CN B031495907A CN 03149590 A CN03149590 A CN 03149590A CN 100344168 C CN100344168 C CN 100344168C
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pdp context
request
deletion
deletion pdp
cause value
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CN1571533A (en
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武亚娟
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to PCT/CN2004/000763 priority patent/WO2005008991A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/06—Registration at serving network Location Register, VLR or user mobility server
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition

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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The present invention discloses a method for ensuring the consistency of packet data protocol (PDP) contexts in the process of deleting the packet data protocol (PDP) contexts, which comprises the following steps: 1) after transmitting a request for deleting the PDP contexts to a serving GPRS support node (SGSN), a gateway GPRS support node waits a response; 2) after receiving a response for deleting the PDP contexts returned by the SGSN, the GGSN judges whether a deleting process is initiated by an AAA server/service proxy server; when the deleting process is initiated by an AAA server/service proxy server, the specific PDP context is directly deleted, otherwise processing is carried out according to protocol specification on the basis of the cause value of the response for deleting the PDP contexts. The present invention effectively avoids the condition that processing inconsistency in the process of deleting PDP contexts possibly occurs in realization, and thereby, has the advantages of universality and enhancement of the effective utilization of system resources. The present invention causes no influence on the existing GGSN equipment realized according to the existing protocol so as to have fine compatibility.

Description

In the block data protocol context delete procedure, guarantee conforming method
Technical field
The present invention relates to the contextual processing procedure of packet data protocol (PDP) in the universal mobile telecommunications system (UMTS), particularly in the PDP Context delete procedure, guarantee conforming method.
Background technology
Universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) is to adopt the 3-G (Generation Three mobile communication system) of Wideband Code Division Multiple Access (WCDMA) (WCDMA) air interface technologies, also the UMTS system is called the WCDMA communication system usually.
Referring to Fig. 1, Fig. 1 is that the UMTS system constitutes schematic diagram, and this system comprises: and subscriber equipment (UserEquipment, UE) 110, UMTS Terrestrial radio access network (UTRAN) 120 and core network (Core Network, CN) 140.The front end of UTRAN 120 is connected by the Uu interface with UE 110, and this interface is a wireless air interface, and UTRAN 120 links to each other with CN 140 by the Iu interface.
Wherein, UE 110 comprises: mobile phone (ME) and SIM card (USIM), the two has constituted UE 110 by the Cu electric interfaces.
UTRAN 120 is used to handle all and wireless function associated, and it comprises: a plurality of base stations (NodeB) 121, a plurality of radio network controllers (RNC) 122, RNC 122 are finished the control and management function of base station.
All voice calls are connected with data in the CN 130 processing UMTS systems, and the exchange of realization and external network and routing function, from be divided in logic circuit commutative field (Circuit Switched Domain, CS) and packet-switched domain (Packet Switched Domain, PS).CN 130 comprises: finish the functions such as control, management, authentication and encryption in CS territory mobile switching center (MSC/VLR) 131, be responsible for fixing or the Serving GPRS Support Node (SGSN) 134 of MSC gateway (GMSC) 132, connection UTRAN 120 and Gateway GPRS Support Node (GGSN) 135 that the mobile network is connected, and the interface GGSN 135 of external IP packet network 140 with other.External IP packet network 140 can comprise PLMN, PSTN, ISDN, the Internet etc.
The common name of the variety of protocol that packet data protocol (PDP) is a packet data package to be transmitted with discrete form, as IP agreement and agreement X.25, it is mutual with CN 130 to be used for external data network 140, and between the CN130 network alternately.PDP Context is in travelling carriage (MS) and GPRS Support Node (GGSN), is the ensemble of communication that a session is preserved.
A kind of handling process of the deletion PDP Context that GGSN is initiated has been described in 3GPP TS 29.060.Referring to Fig. 2, Fig. 2 is the process chart of prior art to the deletion PDP Context of GGSN initiation.This flow process may further comprise the steps:
Step 201, GGSN sends deletion PDP Context request message to SGSN.
Step 202, SGSN sends deexcitation PDP Context request message to MS.
Step 203, MS returns to SGSN and accepts deexcitation PDP Context message
Step 204, SGSN returns deletion PDP Context response message and gives GGSN.
Step 205 discharges the RAB (RAB) between MS and the SGSN.
Aloft on the interface, the RAB dispose procedure is responsible for discharging relevant RAB resource.According to this standard, when GGSN initiates deletion PDP Context request message, the SGSN that receives this request message will return deletion PDP Context response message after treatment to transmit leg, wherein most important information is reason (cause) value, this IE (Information Element, information unit), the result of deletion PDP Context request message reprocessing is received in expression.The possible cause value that can fill in the response message comprises:
' Request Accepted ' ' asks to accept ';
The essential IE of Mandatory IE incorrect ' ' is incorrect ';
The essential IE of ' Mandatory IE missing ' ' loses ';
The optional IE of ' Optional IE Incorrect ' ' is incorrect ';
The message format that ' Invalid message format ' ' is invalid ';
' Non existent ' ' does not exist ';
If this removal request at be a non-existent PDP Context, then the cause value in the response message is " Non existent ", the TEID field fills out 0.
If the cause value in the deletion PDP Context response message of receiving is ' Request accepted ' and ' other values outside the Non Existent ', this PDP Context continues to keep activating so, and is not deleted.
GGSN is as an important support node of packet domain in GPRS and the UMTS system, except supporting on the Gn/Gp interface the GTP agreement, on the Gi interface, also support various protocols, comprising and remote authentication dial access service (RADIUS) server between use radius protocol, be used for realize chargeing and authentication function.
Radius protocol has obtained using widely on IP network as a kind of puppy parc, and nearly all GGSN equipment all provides the support to radius protocol, otherwise will be subjected to very big restriction in the support of business.Described how to use radius protocol on the Gi interface at 3GPP TS 29.061.
Under the situation of supporting 3GPP TS 29.061 and radius protocol, will there be inconsistent problem in the processing for deletion PDP Context process among the existing 3GPP TS 29.060.Make a concrete analysis of as follows:
RADIUS is used for transmitting the information relevant with the GPRS user conversation between GGSN and aaa server or service agent server, in some IP uses, application server need and GGSN mutual, ask specific PDP session of termination.As shown in Figure 3, Fig. 3 is the PDP Context delete procedure flow chart of prior art aaa server initiation.
This flow process may further comprise the steps:
Step 301, aaa server or service agent server send RADIUS deletion connection request (RADIUS Disconnect Request) message and give GGSN.
Step 302, GGSN receives the processing that will initiate to delete this PDP Context after this message, sends deletion PDP Context request message (DeletePDPContextReq) to SGSN.
Step 303, SGSN returns deletion PDP Context response message (DeletePDPContextRes) to GGSN.
Step 304, GGSN sends RADIUS deletion connection to aaa server and replys (RADIUSDisconnect Response) message.
Regulation in 3GPP TS 29.061, GGSN does not need to wait for the deletion PDP Context response message from SGSN, just can send RADIUS Disconnect Response message to aaa server or service agent server.In the existing scheme, no matter whether wait for deletion PDP Context response message in the GGSN actual treatment from SGSN, all will return a RADIUS DisconnectResponse message, delete this specific PDP Context simultaneously, finish this session to aaa server.But as previously mentioned, GGSN also will initiate the request of deletion PDP Context to SGSN, also will receive the deletion PDP Context response message that SGSN returns, according in the deletion PDP Context response message with the cause value decide further processing to PDP Context among the GGSN.If in the deletion PDP Context response message of returning entrained cause value for ' Request accepted ' and ' Non Existent ', then handle any problem that do not have; If the cause value of carrying is other values, according to the regulation of 3GPP TS 29.060 agreements, this PDP Context also will be kept activation, not delete.Yet for the deletion of initiating by aaa server or service agent server, all be to cause IP to use for some reason can't continue to provide service to specific user or session, used up etc. such as the pre-paid account expense, also had a lot of reasons not list one by one at this.In this case, this specific PDP Context should be deleted, no matter receive from the cause value in the deletion PDP Context response message of SGSN be what.Therefore in realization, cause GGSN to this type of situation handle inconsistent.This inconsistency can be brought resource waste and other problem.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of conforming method that in the block data protocol context delete procedure, guarantees, strengthen versatility, reduce because the problems such as system resource waste that the inconsistency that PDP Context is handled is brought.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind ofly guarantee conforming method in packet data protocol (PDP) context delete procedure, this method may further comprise the steps:
1) Gateway GPRS Support Node (GGSN) is after sending the request of deletion PDP Context to Serving GPRS Support Node (SGSN), and the deletion PDP Context that wait SGSN returns is replied;
2) after GGSN receives that deletion PDP Context that SGSN returns is replied, judge whether it is aaa server/delete procedure that the service agent server is initiated, if, then directly delete this specific PDP Context, and according to the reason cause value of deletion PDP Context in replying, according to predetermined repeating transmission deletion PDP Context request mechanism processing; The delete procedure of initiating if not aaa server/service agent server, the cause value in replying according to the deletion PDP Context is stipulated to handle according to 3GPP TS 29.060 agreements.
Can be scheduled to retransmit deletion PDP Context request mechanism, when the cause value in described deletion PDP Context is replied is ' accepting request ' (' Request accepted ') or ' not existing ' (' Non existent '), do not retransmit this deletion PDP Context request;
When the cause value in described deletion PDP Context is replied is ' invalid message format ' (' Invalidmessage format ') or ' essential IE is incorrect ' (' Mandatory IE incorrect ') or ' essential IE loses ' (' Mandatory IE missing '), retransmit this deletion PDP Context request;
When the cause value in described deletion PDP Context is replied is ' optional IE is incorrect ' (' Optional IEIncorrect '), retransmit according to the regulation of predetermined repeating transmission PDP Context request mechanism.
Described according to the cause value of deletion PDP Context in replying, the method of handling according to 3GPP TS 29.060 agreements regulations can for: when the cause value in the deletion PDP Context is replied is ' accepting request ' (' Request accepted ') or ' not existing ' (' Non Existent '), delete this PDP Context;
When the cause value of deletion PDP Context in replying neither ' accepting request ' (' Request accepted ') when neither ' not have ' (' Non Existent '), keeps this PDP context activation state, do not delete this PDP Context.
By technical scheme of the present invention as seen, this conforming method that in the block data protocol context delete procedure, guarantees of the present invention, when GGSN receives deletion PDP Context response message from SGSN, carry out different processing according to the deletion reason, if the delete procedure that the deletion PDP conversation request that aaa server or other service agent servers are initiated causes, no matter then carry any cause value in the response message that GGSN receives, all will delete this specific PDP Context, other situations are then judged the cause value earlier, and whether decision deletes this PDP Context then.The inconsistent situation of processing that the present invention may occur when the PDP Context delete procedure in having avoided realizing, thus have more versatility, can improve the effective rate of utilization of system resource, reduce system resource waste.
Description of drawings
Fig. 1 constitutes schematic diagram for the UMTS system;
Fig. 2 is the process chart of prior art to the deletion PDP Context of GGSN initiation;
The PDP Context delete procedure flow chart that Fig. 3 initiates for the prior art aaa server;
Fig. 4 is the handling process schematic diagram in the PDP Context delete procedure of a preferred embodiment of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
This conforming method that in the block data protocol context delete procedure, guarantees of the present invention, when GGSN receives deletion PDP Context response message from SGSN, carry out different processing according to the deletion reason, if the delete procedure that the deletion PDP conversation request that aaa server or other service agent servers are initiated causes, no matter then carry any cause value in the response message that GGSN receives, all will delete this specific PDP Context, other situations are then judged the cause value earlier, and whether decision deletes this PDP Context then.
Referring to Fig. 4, Fig. 4 is the handling process schematic diagram in the PDP Context delete procedure of a preferred embodiment of the present invention.This handling process may further comprise the steps:
Step 401, Gateway GPRS Support Node (GGSN) is after sending the request of deletion PDP Context to Serving GPRS Support Node (SGSN), and the deletion PDP Context that wait SGSN returns is replied.
Step 402 after GGSN receives that deletion PDP Context that SGSN returns is replied, judges whether it is aaa server/delete procedure that the service agent server is initiated, if, execution in step 403-405 then, otherwise, execution in step 406.
Step 403-405 directly deletes this specific PDP Context.Judge whether the cause value during deleting PDP Context replys is ' accepting request ' (' Request accepted ') or ' not existing ' (' Nonexistent '), if then do not retransmit this deletion PDP Context request, execution in step 408;
Otherwise, retransmit the request of deletion PDP Context according to predetermined repeating transmission deletion PDP Context request mechanism.If when the cause value during the deletion PDP Context is replied is ' invalid message format ' (' Invalidmessage format ') or ' essential IE is incorrect ' (' Mandatory IE incorrect ') or ' essential IE loses ' (' Mandatory IE missing '), can retransmit this deletion PDP Context request; When the cause value during if the deletion PDP Context is replied is ' optional IE is incorrect ' (' Optional IEIncorrect '), can retransmits also and can not retransmit according to regulation in the retransmission mechanism.
Among the present invention, if the cause value is ' Request accepted ' and ' other values outside the Non Existent ', GGSN can also construct new deletion PDP Context request message repeating transmission and give SGSN, and purpose is that the PDP Context of guaranteeing SGSN and GGSN place is consistent.Repeating transmission deletion PDP Context request message and retransmit number of times and retransmission mechanism can be according to the actual conditions specific implementation whether, above-mentioned retransmission process is an embodiment only, is not limited thereto kind of a mode in the practical application.
Step 406 judges whether the cause value during deleting PDP Context replys is ' accepting request ' (' Request accepted ') or ' not existing ' (' Non existent '), if then execution in step 408, otherwise execution in step 407.
Step 407 keeps this PDP Context to continue state of activation according to the agreement regulation, does not delete this PDP Context, finishes.
Step 408 behind this PDP Context of agreement regulation deletion, finishes.
By the above embodiments as seen, this conforming method that guarantees in the block data protocol context delete procedure of the present invention is that existing a kind of of implementation improved one's methods.Whether the present invention is that the deletion PDP Context process that aaa server and service agent server are initiated determines the processing of GGSN to specific PDP Context by distinguishing, the inconsistent situation of processing that may occur in having avoided realizing, thereby have more versatility, can the enhanced system resources effective utilize.This improvement can not impact the existing GGSN equipment of realizing according to existing protocol, and is compatible good.

Claims (3)

1, a kind ofly in packet data protocol PDP Context delete procedure, guarantee conforming method, it is characterized in that this method may further comprise the steps:
1) Gateway GPRS Support Node GGSN is after sending the request of deletion PDP Context to Serving GPRS Support Node SGSN, and the deletion PDP Context that wait SGSN returns is replied;
2) after GGSN receives that deletion PDP Context that SGSN returns is replied, if the delete procedure that aaa server/service agent server is initiated, directly delete this specific PDP Context, and according to the reason cause value of deletion PDP Context in replying, according to predetermined repeating transmission deletion PDP Context request mechanism processing; The delete procedure of initiating if not aaa server/service agent server, the cause value in replying according to the deletion PDP Context is stipulated to handle according to 3GPP TS 29.060 agreements.
2, the method for claim 1 is characterized in that, the described method of handling according to predetermined repeating transmission deletion PDP Context request mechanism is:
Cause value in described deletion PDP Context is replied is for ' Request accepted ' or ' when not having Non existent ', do not retransmit this deletion PDP Context request accepts request;
Cause value in described deletion PDP Context is replied is for ' invalid message format Invalidmessage format ' or ' essential IE incorrect Mandatory IE incorrect ' or ' when essential IE loses Mandatory IE missing ', retransmit this deletion PDP Context request;
Cause value in described deletion PDP Context is replied is for ' during the incorrect Optional IEIncorrect ' of optional IE, retransmitting according to the regulation of predetermined repeating transmission deletion PDP Context request mechanism.
3, the method for claim 1 is characterized in that step 2) the described method of handling according to 3GPP TS 29.060 agreements regulations is:
When the cause value of deletion PDP Context in replying is that ' Request accepted ' or ' when not having Non Existent ', delete this PDP Context accepts request;
Cause value in the deletion PDP Context is replied is neither ' the Request accepted ' that accepts request neither ' when not having Non Existent ', keep this PDP context activation state, not delete this PDP Context.
CNB031495907A 2003-07-17 2003-07-17 Method for ensuring consistency during context deleting of packet data protocol Expired - Fee Related CN100344168C (en)

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PCT/CN2004/000763 WO2005008991A1 (en) 2003-07-17 2004-07-07 A method of ensure consistency during the course of deleting the pdp (packet data protocol) context

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CN101001262B (en) * 2006-01-11 2011-11-09 上海原动力通信科技有限公司 IP address release method
CN101800969B (en) * 2009-02-10 2013-10-02 华为技术有限公司 PDN (Packet Data NetWork) gateway (GW) information management method, relevant equipment and system
KR20230081403A (en) * 2021-11-30 2023-06-07 씨제이제일제당 (주) Texture measuring apparatus and texture measuring method

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WO2003013165A1 (en) * 2001-08-01 2003-02-13 Telefonaktiebolaget Lm Ericsson (Publ) An arrangement for cleaning up hanging pdp contexts in ggsn

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