CN100505929C - Route area updating method between SGSNs - Google Patents
Route area updating method between SGSNs Download PDFInfo
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- CN100505929C CN100505929C CNB200510051509XA CN200510051509A CN100505929C CN 100505929 C CN100505929 C CN 100505929C CN B200510051509X A CNB200510051509X A CN B200510051509XA CN 200510051509 A CN200510051509 A CN 200510051509A CN 100505929 C CN100505929 C CN 100505929C
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Abstract
Said invention provides routing area updating method among SGSN. It contains when received mobile users routing area updating request message, said new SGSN obtaining mobile users routing area update information from mobile users side, and according to said information to proceed routing area updating among SGSN. When new SGSN unable obtaining mobile users routing area update information according to protocol regulation from old SGSN side, said invention can complete mobile users SGSN routing area updating through obtaining routing area update information from mobile users side, thereby raising routing area updating success ratio among SGSN.
Description
Technical field
The present invention relates to the wireless communication technique field, be specifically related to a kind of method of inter-SGSN routing area update.
Background technology
SGSN (Serving GPRS Support Node) is the nucleus equipment of GPRS/UMTS (GPRS/universal mobile telecommunications system) packet domain, and the position of SGSN in mobile communications network as shown in Figure 1.
SGSN mainly finishes the route and the functions such as forwarding, authentication and encryption, session management, mobile management, Logical Link Management, ticket generation and output of packet data package.
The mobile subscriber is after successfully being attached to SGSN, in order regularly to upgrade MM (mobile management) context, the consistency that keeps state in mobile subscriber and the network, the mobile subscriber needs regularly start-up period Routing Area Update timer, and behind periodicity Routing Area Update timer expiry, carry out the consistency that information interaction keeps state in mobile subscriber and the network by initiating periodicity Routing Area Update flow process and network.
Be provided with among the SGSN with corresponding move of mobile subscriber's periodicity Routing Area Update timer and can reach timer, this moves and can reach the periodicity Routing Area Update length of timer that length of timer is longer than the mobile subscriber slightly.Move and to reach timer and after the each Routing Area Update of mobile subscriber is finished, restart, if can reach timer expiry up to moving, the mobile subscriber never initiates periodically Routing Area Update flow process, then SGSN thinks that this mobile subscriber has lost contact with network, and under the situation of not notifying the mobile subscriber this mobile subscriber of implicit detach.
Cover relatively poor zone or do not have shielding area that wireless signal covers such as mountain area, tunnel, exclusion area etc. at wireless signal; the periodicity Routing Area Update timer expiry that occurs the mobile subscriber through regular meeting; the mobile subscriber can't initiate the situation that periodically Routing Area Update flow process and network are carried out information interaction; like this; after moving of SGSN can reach timer expiry, SGSN was with this mobile subscriber's implicit detach.
After the mobile subscriber is by implicit detach, if this mobile subscriber has left the blind zone that wireless signal covers relatively poor zone or do not have wireless signal to cover, when roaming to the route district under another SGSN, the mobile subscriber will initiate the inter-SGSN routing area update flow process.The process of inter-SGSN routing area update flow process as shown in Figure 2.
Among Fig. 2, send RAURequest message step 2-1, mobile subscriber to new SGSN, Routing Area Update is carried out in request.
After determining that according to the OLD RAI that carries in the RAU Request message (old Routing Area Identifier) this Routing Area Update is inter-SGSN routing area update to step 2-2, new SGSN, according to the new SGSN of regulation of 3GPP agreement after receiving mobile subscriber's RAU Request message, send SGSN ContextRequest (SGSN context request) message to old SGSN, acquisition request mobile subscriber's Routing Area Update information, Routing Area Update information such as international mobile subscriber identity, discontinuous reception parameters, network capabilities parameter etc.
To step 2-3, since this mobile subscriber by implicit detach, old SGSN can't obtain this mobile subscriber's Routing Area Update information according to the P-TMSI that carries in the SGSN ContextRequest message (packet domain temporary mobile subscriber sign), and old SGSN sends to new SGSN and carries SGSN Context Response (SGSN context response) message of cause value for " IMSI NotKnown " (international mobile subscriber identity the unknown).
Carry cause value for after the SGSNContext Response message of " IMSI Not Known " to step 2-4, new SGSN receiving, carry RAU Reject (Routing Area Update refusal) message of cause value to mobile subscriber's transmission for " Implicitly Detached " (implicit detach), impel the mobile subscriber to initiate the SGSN attaching process again, this inter-SGSN routing area update flow process failure.
The success rate of inter-SGSN routing area update is to weigh a core index of communication equipment performance, also is the KPI (KPI Key Performance Indicator) that numerous mobile operator paid close attention to.
Cover relatively poor zone at wireless signal, the implementation of existing inter-SGSN routing area update makes inter-SGSN routing area update success rate index lower, can't satisfy the requirement of mobile operator, has influenced the satisfaction of mobile operator to communication equipment.
Summary of the invention
The objective of the invention is to, a kind of method of inter-SGSN routing area update is provided, to realize improving the purpose of inter-SGSN routing area update success rate.
For achieving the above object, the method for a kind of inter-SGSN routing area update provided by the invention comprises:
The new SGSN that receives mobile subscriber's Routing Area Update request message obtains mobile subscriber's Routing Area Update information from mobile subscriber's side, and carries out inter-SGSN routing area update according to the described Routing Area Update information of obtaining.
Described method specifically comprises: described new SGSN is in that determine can not be when mobile subscriber's old SGSN side be obtained this mobile subscriber's Routing Area Update information, obtain this mobile subscriber's Routing Area Update information from described mobile subscriber's side, and carry out inter-SGSN routing area update according to the described Routing Area Update information of obtaining.
Described Routing Area Update information comprises: mobile subscriber's identification information, MM context-related information; Described MM context-related information comprises: discontinuous reception parameters, network capabilities parameter.
Described method specifically comprises:
A, described new SGSN receive mobile subscriber's Routing Area Update request message;
When b, described new SGSN carry the MM context-related information the Routing Area Update information of determining to obtain from described mobile subscriber's old SGSN side this mobile subscriber and described Routing Area Update request message, obtain described MM context-related information, and obtain this mobile subscriber's identification information from described mobile subscriber's side;
C, described new SGSN carry out inter-SGSN routing area update according to described MM context-related information of obtaining and identification information.
Described step b specifically comprises:
When b1, described new SGSN carry the MM context-related information the Routing Area Update information of determining to obtain from described mobile subscriber's old SGSN side this mobile subscriber and described Routing Area Update request message, obtain described MM context-related information;
B2, described new SGSN obtain described mobile subscriber's identification information by the identification flow process.
Described mobile subscriber's identification information comprises: international mobile subscriber identity.
New SGSN determines and can not specifically comprise from the step that described mobile subscriber's old SGSN side is obtained this mobile subscriber's Routing Area Update information among the described step b1:
When the cause value that described new SGSN comes in the old SGSN transmission that receives described mobile subscriber is the SGSN context response information of international mobile subscriber identity the unknown, determine to obtain from described mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information; Or
Described new SGSN determines to obtain from described mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information in the time can not getting access to described mobile subscriber's old SGSN address information; Or
When described new SGSN does not receive described mobile subscriber's the SGSN context response information of old SGSN transmission at the fixed time at interval, determine to obtain from described mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information.
Described step b2 specifically comprises:
Described new SGSN sends the identification request message to the mobile subscriber;
Described mobile subscriber is carried on its international mobile subscriber identity and transfers to described new SGSN in the identification response message after receiving described identification request message;
Described new SGSN obtains described mobile subscriber's international mobile subscriber identity from identification response message.
Description by technique scheme as can be known, the present invention is by obtaining mobile subscriber's Routing Area Update information from mobile subscriber's side, the technical scheme of inter-SGSN routing area update can be realized flexibly, as as new SGSN because a variety of causes can not be according to the regulation of agreement when mobile subscriber's old SGSN side be obtained mobile subscriber's Routing Area Update information, the present invention can finish mobile subscriber's inter-SGSN routing area update process equally, has avoided the phenomenon of inter-SGSN routing area update failure as much as possible; Thereby realized raising inter-SGSN routing area update success rate by technical scheme provided by the invention, improved the purpose of mobile operator network equipment satisfaction.
Description of drawings
Fig. 1 is the networking schematic diagram of GPRS/UMTS;
Fig. 2 is the flow chart of the inter-SGSN routing area update of prior art;
Fig. 3 is the flow chart one of inter-SGSN routing area update of the present invention;
Fig. 4 is the flowchart 2 of inter-SGSN routing area update of the present invention;
Fig. 5 is the flow chart 3 of inter-SGSN routing area update of the present invention.
Embodiment
Regulation according to agreement, the new SGSN that receives mobile subscriber's Routing Area Update request message need obtain this mobile subscriber's Routing Area Update information from this mobile subscriber's old SGSN side, as international mobile subscriber identity, discontinuous reception parameters, network capabilities parameter etc., to proceed the process of inter-SGSN routing area update.But; in actual communication systems; because a lot of reasons makes new SGSN can't obtain mobile subscriber's Routing Area Update information from the old SGSN side through regular meeting; cause mobile subscriber's inter-SGSN routing area update procedure failure; the mobile subscriber need be by attachment flow attached on the new SGSN, and as the regulation according to the 3GPP agreement, the mobile subscriber is receiving cause value for after the RAU Reject message of " Implicitly Detached "; again initiate attachment flow, with attached on the new SGSN.
When new SGSN can't be when mobile subscriber's old SGSN side be obtained mobile subscriber's Routing Area Update information, if new SGSN can also obtain mobile subscriber's Routing Area Update information by other modes, then can proceed mobile subscriber's inter-SGSN routing area update process, thereby improve the inter-SGSN routing area update success rate.
Therefore, core of the present invention is: the new SGSN that receives mobile subscriber's Routing Area Update request message obtains mobile subscriber's Routing Area Update information from mobile subscriber's side, and carries out inter-SGSN routing area update according to the described information of obtaining.
Based on core concept of the present invention technical scheme provided by the invention is further described below.
In order to follow the 3GPP agreement as much as possible, the new SGSN that receives mobile subscriber's Routing Area Update request message among the present invention at first needs to judge whether to obtain from this mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information, if new SGSN can obtain this mobile subscriber's Routing Area Update information from mobile subscriber's old SGSN side, if promptly new SGSN can get access to this mobile subscriber's Routing Area Update information from the SGSN context response information loaded information that the old SGSN transmission comes, method then of the present invention finishes; If new SGSN can not obtain this mobile subscriber's Routing Area Update information from mobile subscriber's old SGSN side, as new SGSN because of the address information that can not get old SGSN, send the SGSN context response information that do not receive old SGSN after the SGSN context request message, receive cause value and can not obtain this mobile subscriber's Routing Area Update information from the old SGSN side for the reasons such as SGSN context response information of " IMSI NotKnown ", then the new SGSN among the present invention should obtain this mobile subscriber's Routing Area Update information from mobile subscriber's side.
Then, proceed the inter-SGSN routing area update process according to the Routing Area Update information of obtaining from mobile subscriber's side.
Routing Area Update information among the present invention comprises: mobile subscriber's identification information and MM context-related information.
Mobile subscriber's identification information can be mobile subscriber's IMSI.
Because new SGSN need obtain 3GPP protocol version and the cryptographic algorithm that the mobile subscriber supports according to mobile subscriber's network capabilities parameter, and need when the paging mobile subscriber, carry discontinuous reception parameters, the value of this discontinuous reception parameters can directly have influence on mobile subscriber's GPRS/UMTS business, therefore, should comprise in mobile subscriber's the MM context-related information: discontinuous reception parameters and network capabilities parameter etc.
With the realization principle of mobile subscriber's parameter current information informing network equipment, all carry mobile subscriber's discontinuous reception parameters and network capabilities parameter information unit based on as far as possible in the Routing Area Update request message that present most mobile subscriber sends.
Therefore, the present invention realize inter-SGSN routing area update method can for: new SGSN is when receiving mobile subscriber's Routing Area Update request message, need at first to judge whether it can obtain this mobile subscriber's Routing Area Update information from this mobile subscriber's old SGSN side, if new SGSN can obtain this mobile subscriber's Routing Area Update information from mobile subscriber's old SGSN side, if promptly new SGSN can get access to this mobile subscriber's Routing Area Update information from the SGSN context response information loaded information that the old SGSN transmission comes, method then of the present invention finishes; If new SGSN can not obtain this mobile subscriber's Routing Area Update information from mobile subscriber's old SGSN side, as new SGSN because of can not get the address information of old SGSN, do not receive the SGSN context response information of old SGSN after the transmission SGSN context request message, receive cause value and can not obtain this mobile subscriber's Routing Area Update information for the reasons such as SGSN context response information of " IMSI NotKnown " from the old SGSN side, then the new SGSN among the present invention should judge the discontinuous reception parameters that whether carries this mobile subscriber in mobile subscriber's the Routing Area Update request message of its reception, the network capabilities parameter, if do not carry this mobile subscriber's discontinuous reception parameters and network capabilities parameter, method then of the present invention finishes; If carry this mobile subscriber's discontinuous reception parameters and network capabilities parameter, then from this Routing Area Update request message, obtain discontinuous reception parameters and network capabilities parameter.
Then, new SGSN obtains this mobile subscriber's international mobile subscriber identity by the identification flow process from this mobile subscriber's side, after having obtained above-mentioned information, proceeds follow-up inter-SGSN routing area update process.
After the mobile subscriber is by implicit detach, if this mobile subscriber has left the blind zone that wireless signal covers relatively poor zone or do not have wireless signal to cover, when roaming to the affiliated route district of another SGSN and initiating the inter-SGSN routing area update flow process, by said method, can complete successfully the inter-SGSN routing area update process.
Cover relatively poor zone at wireless signal, the present invention can very effective raising inter-SGSN routing area update success rate, thereby improves the satisfaction of mobile operator to communication equipment.
Method below in conjunction with accompanying drawing 3, accompanying drawing 4,5 pairs of inter-SGSN routing area updates of the present invention of accompanying drawing is elaborated.
In Fig. 3, step 3-1, mobile subscriber send the Routing Area Update request message by base station sub-system to new SGSN.
After receiving this Routing Area Update request message to step 3-2, new SGSN, the address that from DNS (name server), obtains this mobile subscriber's old SGSN, and send the SGSN context request message to old SGSN.
Receive the Routing Area Update request message that new SGSN sends to step 3-3, old SGSN, owing to this mobile subscriber by reasons such as implicit detach, cause old SGSN that this mobile subscriber's the Routing Area Update information that comprises IMSI, discontinuous reception parameters, network capabilities parameter can not be provided for new SGSN, old SGSN is that the SGSN context response information of IMSI Not Known transfers to new SGSN with cause value.
Receiving cause value when being the SGSN context response information of IMSI Not Known to step 3-4, new SGSN, judge the mobile subscriber transmits in the next Routing Area Update request message whether carry discontinuous reception parameters and network capabilities parameter, if do not carry above-mentioned two parameters in the Routing Area Update request message, method then of the present invention finishes; If carry above-mentioned two parameters in the Routing Area Update request message, new SGSN sends identification request (Identity Request) message to this mobile subscriber, to step 3-5.
At step 3-5, the mobile subscriber receives the identification request message, its IMSI is carried in identification response (Identity Response) message transfers to new SGSN.
To step 3-6, new SGSN obtains mobile subscriber's IMSI from identification response message, and this mobile subscriber is carried out the safety verification process according to the pre-configured needs that determine whether, carry out safety verification if desired, new SGSN and this mobile subscriber carry out the safety verification process, and arrive step 3-7 in safety verification success back; If do not need to carry out safety verification, then directly arrive step 3-7.
At step 3-7, new SGSN sends Routing Area Update to the mobile subscriber and accepts (RAU Accept) message.
To step 3-8, the mobile subscriber receives after Routing Area Update accepts message, sends Routing Area Update to new SGSN and finishes (RAU Complete) message.New SGSN becomes this mobile subscriber's current SGSN.
In Fig. 4, step 4-1, mobile subscriber send the Routing Area Update request message by base station sub-system to new SGSN.
After receiving this Routing Area Update request message to step 4-2, new SGSN, the address that from DNS (name server), obtains this mobile subscriber's old SGSN, and send the SGSN context request message to old SGSN.
Judge whether to receive the SGSN context response information of old SGSN in the interval at the fixed time to step 4-3, new SGSN, if do not receive the SGSN context response information of old SGSN in the definite interval at the fixed time of new SGSN always, to step 4-4.
Judge at step 4-4, new SGSN the mobile subscriber transmits in the next Routing Area Update request message whether carry discontinuous reception parameters and network capabilities parameter, if do not carry above-mentioned two parameters in the Routing Area Update request message, method then of the present invention finishes; If carry above-mentioned two parameters in the Routing Area Update request message, new SGSN sends the identification request message to this mobile subscriber, to step 4-5.
At step 4-5, the mobile subscriber receives the identification request message, its IMSI is carried on transfers to new SGSN in the identification response message.
To step 4-6, new SGSN obtains mobile subscriber's IMSI from identification response message, and this mobile subscriber is carried out the safety verification process according to the pre-configured needs that determine whether, carry out safety verification if desired, new SGSN and this mobile subscriber carry out the safety verification process, and arrive step 4-7 in safety verification success back; If do not need to carry out safety verification, then directly arrive step 4-7.
At step 4-7, new SGSN sends Routing Area Update to the mobile subscriber and accepts message.
To step 4-8, the mobile subscriber receives after Routing Area Update accepts message, sends Routing Area Update to new SGSN and finishes message.New SGSN becomes this mobile subscriber's current SGSN.
In Fig. 5, step 5-1, mobile subscriber send the Routing Area Update request message by base station sub-system to new SGSN.
Receive this Routing Area Update request message to step 5-2, new SGSN, and when the address of the old SGSN of determining from DNS, to obtain this mobile subscriber, to step 5-3.
Judge at step 5-3, new SGSN the mobile subscriber transmits in the next Routing Area Update request message whether carry discontinuous reception parameters and network capabilities parameter, if do not carry above-mentioned two parameters in the Routing Area Update request message, method then of the present invention finishes; If carry above-mentioned two parameters in the Routing Area Update request message, new SGSN sends the identification request message to this mobile subscriber, to step 5-4.
At step 5-4, the mobile subscriber receives the identification request message, its IMSI is carried on transfers to new SGSN in the identification response message.
To step 5-5, new SGSN obtains mobile subscriber's IMSI from identification response message, and this mobile subscriber is carried out the safety verification process according to the pre-configured needs that determine whether, carry out safety verification if desired, new SGSN and this mobile subscriber carry out the safety verification process, and arrive step 5-6 in safety verification success back; If do not need to carry out safety verification, then directly arrive step 5-6.
At step 5-6, new SGSN sends Routing Area Update to the mobile subscriber and accepts message.
To step 5-7, the mobile subscriber receives after Routing Area Update accepts message, sends Routing Area Update to new SGSN and finishes message.New SGSN becomes this mobile subscriber's current SGSN.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (8)
1, a kind of method of inter-SGSN routing area update is characterized in that, comprising:
The new SGSN that receives mobile subscriber's Routing Area Update request message obtains mobile subscriber's Routing Area Update information from mobile subscriber's side, and carries out inter-SGSN routing area update according to the described Routing Area Update information of obtaining.
2, the method for a kind of inter-SGSN routing area update as claimed in claim 1, it is characterized in that, described method specifically comprises: described new SGSN is in that determine can not be when mobile subscriber's old SGSN side be obtained this mobile subscriber's Routing Area Update information, obtain this mobile subscriber's Routing Area Update information from described mobile subscriber's side, and carry out inter-SGSN routing area update according to the described Routing Area Update information of obtaining.
3, the method for a kind of inter-SGSN routing area update as claimed in claim 2 is characterized in that, described Routing Area Update information comprises: mobile subscriber's identification information, MM context-related information; Described MM context-related information comprises: discontinuous reception parameters, network capabilities parameter.
4, the method for a kind of inter-SGSN routing area update as claimed in claim 3 is characterized in that, described method specifically comprises:
A, described new SGSN receive mobile subscriber's Routing Area Update request message;
When b, described new SGSN carry the MM context-related information the Routing Area Update information of determining to obtain from described mobile subscriber's old SGSN side this mobile subscriber and described Routing Area Update request message, obtain described MM context-related information, and obtain this mobile subscriber's identification information from described mobile subscriber's side;
C, described new SGSN carry out inter-SGSN routing area update according to described MM context-related information of obtaining and identification information.
5, the method for a kind of inter-SGSN routing area update as claimed in claim 4 is characterized in that, described step b specifically comprises:
When b1, described new SGSN carry the MM context-related information the Routing Area Update information of determining to obtain from described mobile subscriber's old SGSN side this mobile subscriber and described Routing Area Update request message, obtain described MM context-related information;
B2, described new SGSN obtain described mobile subscriber's identification information by the identification flow process.
6, the method for a kind of inter-SGSN routing area update as claimed in claim 5 is characterized in that, described mobile subscriber's identification information comprises: international mobile subscriber identity.
7, the method for a kind of inter-SGSN routing area update as claimed in claim 5 is characterized in that, new SGSN determines and can not specifically comprise from the step that described mobile subscriber's old SGSN side is obtained this mobile subscriber's Routing Area Update information among the described step b1:
When the cause value that described new SGSN comes in the old SGSN transmission that receives described mobile subscriber is the SGSN context response information of international mobile subscriber identity the unknown, determine to obtain from described mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information; Or
Described new SGSN determines to obtain from described mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information in the time can not getting access to described mobile subscriber's old SGSN address information; Or
When described new SGSN does not receive described mobile subscriber's the SGSN context response information of old SGSN transmission at the fixed time at interval, determine to obtain from described mobile subscriber's old SGSN side this mobile subscriber's Routing Area Update information.
8, the method for a kind of inter-SGSN routing area update as claimed in claim 5 is characterized in that, described step b2 specifically comprises:
Described new SGSN sends the identification request message to the mobile subscriber;
Described mobile subscriber is carried on its international mobile subscriber identity and transfers to described new SGSN in the identification response message after receiving described identification request message;
Described new SGSN obtains described mobile subscriber's international mobile subscriber identity from identification response message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510051509XA CN100505929C (en) | 2005-03-04 | 2005-03-04 | Route area updating method between SGSNs |
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| CNB200510051509XA CN100505929C (en) | 2005-03-04 | 2005-03-04 | Route area updating method between SGSNs |
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| CN1829193A CN1829193A (en) | 2006-09-06 |
| CN100505929C true CN100505929C (en) | 2009-06-24 |
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| CN101179838B (en) * | 2006-11-10 | 2012-03-21 | 华为技术有限公司 | Network concealed separation method of subscriber terminal |
| US7653009B2 (en) * | 2007-09-10 | 2010-01-26 | Juniper Networks, Inc. | Routing network packets based on electrical power procurement arrangements |
| CN102695157A (en) * | 2011-03-23 | 2012-09-26 | 富泰华工业（深圳）有限公司 | Mobile communication terminal and position updating method thereof |
| WO2014110803A1 (en) * | 2013-01-18 | 2014-07-24 | Broadcom Corporation | Interworking among dissimilar radio networks |
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