CN101064936A - Method and system for accessing home zone of roaming users - Google Patents
Method and system for accessing home zone of roaming users Download PDFInfo
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Abstract
The invention provides an accessing method and system in belonging area for roaming user, the method includes following steps: when the roaming user accesses the network, if it applies the general name of accessing point APN, the gateway GPRS support node CGSN agent functional entity transmits the message from GPRS support node CGSN to belonging area GGSN, and the GGSN in belonging area processes the user messages and realize the data transmission of SGSN, and it realize the access in belonged area for roaming users. It can realize that the roaming GPRS user processes the requirement of GPRS service back to signed belonging area, and makes the local running trader can develop the incremental value business, ensure the GPRS is open to prepaid user, and realize the real-time charging of data service.
Description
Technical field
The present invention relates to mobile communication technology, concretely, relate to the cut-in method and the system of a kind of roamer's ownership place.
Background technology
Gateway GPRS Support Node (GGSN) and serving GPRS support node (SGSN) are two basic equipments in the GPRS/WCDMA packet domain core network, the major function of SGSN provides the access function of wireless access network (UTRAN)/base station sub-system (BBS), and the major function of GGSN is as the gateway between GPRS/WCDMA system and external packet data net (PDN).SGSN and the position of GGSN equipment in the GPRS/WCDMA network are as shown in Figure 1.
The data service of mobile packet data Client-initiated inserts through SGSN equipment, mails to GGSN, mails to the external packet data net via GGSN at last.When the user initiates to insert request, specify an Access Point Name (APN).Access Point Name APN is used to identify the external network of an appointment and a kind of internet service provider (ISP) of service in GGSN, can obtain the GGSN address of APN correspondence therewith by DNS name resolution according to APN in SGSN.APN comprises two parts: NI (network identity) and OI (operator's sign).NI has defined the external network that GGSN connects.OI has defined the residing PLMN of GGSN (public land mobile network) GPRS net.The APN that is stored in the attaching position register (HLR) includes only APN NI.The APN that user (MS) provides when activating PDP Context must comprise NI, and OI is optional.SGSN can generate default OI according to IMSI International Mobile Subscriber Identity (IMSI).APN is resolved 3GPP TS 23.060 appendix As (APN and GGSNselection) and user's access process has been done the detailed definition of standard.
To some big mobile operator when setting up large-scale GPRS network, for ease of management, realize the networking of layering, such as the GPRS network of CHINAUNICOM and China Mobile, all be to be that GPRS network is set up in unit with the province, GPRS economizes net and is responsible for providing gprs service to the user.Be that same ownership (Home) PLMN can be divided into a plurality of signatory ownership GPRS network, three kinds of corresponding application scenarioss are as follows:
1) packet switching (PS) business in the signatory ownership place of ownership place PLMN;
2) roam to non-signatory ownership place but still belong to the PS business of ownership place PLMN;
3) roam to the PS business of visiting ground (Visited) PLMN.
Dui Ying APN planning principles is divided into two kinds with APN with it: support the general APN of the whole network access and the regional APN of support area property access.
(1) the general APN of support the whole network access:
Each GPRS of the whole nation economizes net all has GGSN can support access to general APN when MS uses this (a bit) APN request access external data network in ownership is economized net, can obtain access service by the GGSN that this province nets; When MS roams in other GPRS economize net,, then economize the GGSN that nets and obtain access service by roaming if use this (a bit) APN request to insert external data network; This (a bit) can economize the APN that nets support by each GPRS of the whole nation and just be called general APN, and they should unified name distribution (as UNINET, UNIWAP, CMNET, CMWAP) in ownership place PLMN GPRS net.
(2) the regional APN of support area property access:
Regional access service is meant for certain (a bit) APN, having only one or several GPRS to economize net has GGSN can support access to its (), MS roams into other GPRS and economizes when netting, if use this (a bit) APN request to insert external data network, then can only obtain access service by the GGSN that its ownership is economized net; These can only just be called regional APN by the APN that specific province net is supported, as isp.com.bj.To this class APN, only need in DNS, itself and corresponding GGSN address to be done configuration, can satisfy user's access demand.
Mobile operator is in order to carry out the value-added service of various places flexibly, and guarantee that GPRS can opening to the prepaid user, realize the real-time deduction of data service, therefore mobile operator proposes gprs service is adopted the ownership place access way, be included in the user who roams into the user of other non-signatory ownership place in the ownership place PLMN and roam to other PLMN networks.At the roaming in the ownership place PLMN, the present invention does not do statement.To roaming to the GPRS user of other PLMN networks, if use general APN, present processing all is directly directly to activate to handle on the GGSN of gateway exchange, can not get back to the homing GGSN of local signatory net.
At present, on mobile phone, HLR, GGSN, all be provided with the APN of place name suffix, promptly cancel the configuration of general APN, can solve the problem that returns possession GGSN when the user roams.But the shortcoming of prior art is:
1) derives to a plurality of regional APN by a general APN, increased the management of APN.
That 2) user sees is the APN of local signatory net, is unfavorable for that mobile operator group company sets up own unified GPRS brand, is unfavorable for unified service development strategy.
Summary of the invention
In view of this, the object of the present invention is to provide the cut-in method and the system of a kind of roamer's ownership place, to solve the problem that the roamer who uses general APN can not get back to the homing GGSN of local signatory net, and can reduce the quantity of APN, simplify the management of APN, and help the unified business development strategy of mobile operator group company.
In order to realize described purpose, technical scheme of the present invention is:
The cut-in method of a kind of roamer's ownership place comprises the steps:
When the roamer initiates to insert request, if use general APN APN, then transmit message from serving GPRS support node SGSN to homing GGSN by a Gateway GPRS Support Node GGSN agent functionality entity, and by homing GGSN process user message and realize transfer of data with visit SGSN.
Described method specifically comprises the steps:
A. the roamer initiates to carry the context activation request message of user totem information to visit ground serving GPRS support node SGSN;
B.SGSN carries out APN according to user signing contract information and selects, when allowing the user to insert, for general APN, described visit ground SGSN is from the Gateway GPRS Support Node GGSN agency's of domain name server (DNS) acquisition ownership place address, and concurrent serving hereinafter set up request message to described GGSN agency;
C. this GGSN agency is according to user totem information in the message that receives, find the address of the Gateway GPRS Support Node GGSN of the signatory ownership place of user, and forwarding contexts is set up solicited message to described homing GGSN address, is connected with data between homing GGSN to set up visit ground SGSN, thereby the realization roamer is in the access of ownership place.
Described user totem information is the information that comprises the unique identification user of Mobile Subscriber International ISDN number MSISDN or IMSI.
Described step c comprises:
The message that described GGSN proxy interfaces is received is resolved, and finds out the GGSN address of the signatory ownership place of corresponding user according to the described user totem information in the message;
Described GGSN acts on behalf of the context that will visit ground SGSN and sets up the GGSN address that the signatory ownership place of described user is revised as in the purpose IP address of request message, and the GGSN address that request message is forwarded to this ownership set up in described context.
Described step c also comprises:
After described homing GGSN receives that request message set up in context, send context to described SGSN and set up response message;
If context is set up successfully, described SGSN is according to the GTP tunnel of response message foundation with homing GGSN, and concurrent serving hereinafter activated response message to described roamer.
Described step b also comprises:
When allowing the user to insert, to regional APN, described visit ground SGSN obtains corresponding homing GGSN address from domain name server (DNS), and concurrent serving hereinafter set up request message to described homing GGSN, set up with homing GGSN between data be connected.
The connecting system of a kind of GGSN roamer's ownership place comprises user, visit serving GPRS support node SGSN and home gateway GPRS Support Node GGSN, also comprises the GGSN agency; Wherein,
Described user initiates the context activation request message to SGSN, and this request message carries user totem information;
Described SGSN carries out APN according to user signing contract information and selects, and judges whether allow the user to insert, and obtains the GGSN agent address of general APN correspondence by DNS name resolution; Send context simultaneously and set up the GGSN agent address of asking to the APN correspondence;
Described GGSN acts on behalf of, and is used to resolve the message packet of reception, according to user totem information in the message, finds the GGSN address of the signatory ownership place of corresponding user, and transmits and set up solicited message to this GGSN address from the context of SGSN;
Described homing GGSN is used for setting up request message foundation according to the context that receives and is connected with the data of visit ground SGSN.
Described GGSN agent functionality entity is supported GPRS Tunnel Protocol.
Described GGSN agent functionality entity also is used for the GGSN address that user ascription area is revised as in the purpose IP address of the IP bag of the message that will receive.
Described user totem information is the information that comprises the unique identification user of Mobile Subscriber International ISDN number MSISDN or IMSI.
Beneficial effect of the present invention is, method and system provided by the invention can solve as MS and roam into other PLMN, and the GGSN that still can get back to signatory ownership place carries out Business Processing.Realized that roaming GPRS user returns signatory ownership place and carries out the demand of gprs service, thereby can make various places mobile operator carry out local value-added service flexibly, and can guarantee that GPRS to the opening of prepaid user, realizes the real-time deduction of data service.And the present invention also has following advantage: for each class common service, have only an APN, can reduce the quantity of APN, simplify the management of APN; The unified business development strategy that helps mobile operator group company is easy to newly-increased general APN, supports the roamer of Inter-PLMN to return the mode that the possession is inserted.And to device transparencies such as SGSN, GGSN, DNS, change is put on the newly added equipment GGSN proxy gateway fully, therefore has good compatibility.
Description of drawings
Fig. 1 is the network structure of existing GPRS/WCDMA;
Fig. 2 is the establishment structure chart of existing extensive GPRS network;
Fig. 3 is the cut-in method flow chart of roamer's of the present invention ownership place.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, specific embodiments of the invention are elaborated below in conjunction with accompanying drawing.
Core concept of the present invention is: set up GGSN agent functionality entity in the connecting system of existing roamer's ownership place, access for general APN, act on behalf of as middle repeater station by this GGSN, and user's context request is forwarded to the ownership GGSN of the signatory net of user, handle by the activation request and the various subsequently data service of the direct process user of ownership place.
For the access of the GPRS user ascription area of realizing roaming into other PLMN, the present invention builds cover GGSN agency (proxy) gateway device at gateway exchange, to increase by a GGSN agent functionality body.After increasing GGSN agent functionality body, not influence of SGSN to the roaming place, it still carries out judgement and the access point selection of APN according to the 3GPP relevant criterion, only initiate after PDP Context sets up request to GGSN agency at SGSN, the GGSN agency is not as common GGSN equipment, set up PDP data interface channel with SGSN, but carry out analysis modify by packet to the PDP context activation request message, further assist visit ground SGSN to set up data and be connected, realize that PLMN internetwork roaming visit user ascription area inserts requirement with homing GGSN.
Fig. 3 is the roamer's of one embodiment of the invention the cut-in method flow chart of ownership place.As shown in Figure 3, method of the present invention comprises the steps:
1) GPRS user sends the SGSN of context activation request message to Visited PLMN at Visited PLMN, activate in the request message and comprise user totem information, this user totem information can for MSISDN (Mobile Subscriber International ISDN number), IMSI or other can the unique identification user information.Can also comprise APN APN in the described activation request message.
2) after the SGSN of Visited PLMN receives request, carry out APN according to user's CAMEL-Subscription-Information and select, and judge whether allow the user to insert;
If the result inserts for allowing the user, then SGSN sends the DNS request to dns server, comprises complete APN information (comprising APN-NI and APN-OI) in the request, to obtain the GGSN address corresponding with described APN by DNS name resolution.
3) if regional APN, the signatory homing GGSN address of the Home PLMN of dns server return area APN correspondence is referring among Fig. 3 10), 11), 12) in flow processing, it belongs to existing flow process, does not add to describe at this.If general APN, dns server returns the GGSN agency's of Home PLMN IP address (can realize by revising existing DNS data configuration, GGSN address corresponding with general APN in the root dns server is modified as the GGSN agent address by original gateway exchange GGSN address).
4) SGSN of Visited PLMN sends context to the GGSN agency and sets up request message.
5) GGSN of Home PLMN agency receives after request message set up in context message is resolved, obtain user totem information (MSISDN or IMSI or other can unique identification user information), the GGSN agency translates the GGSN address of the signatory ownership place of user according to this information.
Owing to need to parse identification informations such as GPRS user's MSISDN or IMSI from the message that receives, so the GGSN agency need possess 3～7 layer protocol analyses, and supports GPRS Tunnel Protocol;
In addition, support GGSN agency to resolve, find the user homing GGSN address of contracting, and PDP is activated request message be forwarded on the corresponding GGSN, can realize in the following way according to MSISDN information:
The mapping table of configuration identifier information on the a.GGSN agency (MSISDN or IMSI etc.) and corresponding GGSN; Perhaps
The b.GGSN agency supports that by plug-in other equipment such as database perhaps domain name server (DNS) is inquired about according to user totem information and obtained corresponding GGSN address.
6) GGSN agency will visit context that SGSN sends over and set up the address that purpose IP address that request message IP wraps is modified as the homing GGSN of MSISDN correspondence, be transmitted to homing GGSN according to Routing Protocol then.
7) after homing GGSN receives that request message set up in context, directly return context and set up response message to Visited PLMN SGSN.If context is set up successfully, then SGSN sets up the GTP tunnel with ownership GGSN according to the GGSN address in the response message.
8) SGSN sends the context activation response message to the user
9) so far, the user sends the business datum message to the GGSN of ownership place.
By method of the present invention, realized that PLMN internetwork roaming visit user's ownership place inserts.
In sum, the GGSN agent functionality entity set up at existing connecting system of the present invention should possess following function:
1) possesses 3～7 layer protocol analyses, support the GTP agreement, can parse the GPRS user totem information.2) can explain information according to the user, find the GGSN address of the signatory ownership place of user.3) can will send to GGSN agency's the purpose IP address (GGSN Agent IP address) of IP bag of GTP message be modified as the GGSN IP address of user ascription area.4) support Routing Protocol, amended data message correctly can be forwarded to homing GGSN.
Functional entity GGSN agency can be an independently network equipment, also can be the functional module of GGSN, i.e. GGSN/GGSN agent functionality unification.
By aforesaid the present invention, realized that roaming GPRS user returns the demand that signatory ownership place carries out gprs service, thereby can make various places mobile operator carry out local value-added service flexibly, and can guarantee that GPRS to the opening of prepaid user, realizes the real-time deduction of data service.And this scheme has following advantage:
1) for each class common service, have only an APN, can reduce the quantity of APN, simplify the management of APN;
2) help the unified business development strategy of mobile operator group company, be easy to newly-increased general APN, support the roamer of Inter-PLMN to return the mode that the possession is inserted.
3) and, to device transparencies such as SGSN, GGSN, DNS, change and to be put into fully on the newly added equipment GGSN proxy gateway, therefore have good compatibility.
Above embodiment only is used to illustrate the present invention, but not is used to limit the present invention.Within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the cut-in method of a roamer ownership place is characterized in that:
In roamer's network insertion process, if use general APN APN, then transmit message from serving GPRS support node SGSN to homing GGSN by a Gateway GPRS Support Node GGSN agent functionality entity, and by homing GGSN process user message and realize transfer of data with visit SGSN.
2. method according to claim 1 is characterized in that comprising the steps:
A. the roamer initiates to carry the context activation request message of user totem information to visit ground serving GPRS support node SGSN;
B.SGSN carries out APN according to user signing contract information and selects, when allowing the user to insert, for general APN, described visit ground SGSN is from the Gateway GPRS Support Node GGSN agency's of domain name server (DNS) acquisition ownership place address, and concurrent serving hereinafter set up request message to described GGSN agency;
C. this GGSN agency is according to user totem information in the message that receives, find the address of the Gateway GPRS Support Node GGSN of the signatory ownership place of user, and forwarding contexts is set up solicited message to described homing GGSN address, is connected with data between homing GGSN to set up visit ground SGSN, thereby the realization roamer is in the access of ownership place.
3. method according to claim 2 is characterized in that:
Described user totem information is the information that comprises the unique identification user of Mobile Subscriber International ISDN number MSISDN or IMSI.
4. method according to claim 2 is characterized in that step c comprises:
The message that described GGSN proxy interfaces is received is resolved, and finds out the GGSN address of the signatory ownership place of corresponding user according to the described user totem information in the message;
The described user GGSN address of ownership place of contracting is revised as in the purpose IP address that request message set up in the context that described GGSN agency will visit ground SGSN, and request message set up in described context is forwarded to this homing GGSN address.
5. method according to claim 4 is characterized in that step c also comprises:
After described homing GGSN receives that request message set up in context, send context to described SGSN and set up response message;
If context is set up successfully, described SGSN is according to the GTP tunnel of response message foundation with homing GGSN, and concurrent serving hereinafter activated response message to described roamer.
6. method according to claim 2 is characterized in that step b also comprises:
When allowing the user to insert, to regional APN, described visit ground SGSN obtains corresponding homing GGSN address from domain name server (DNS), and concurrent serving hereinafter set up request message to described homing GGSN, set up with homing GGSN between data be connected.
7. the connecting system of a GGSN roamer ownership place comprises user, visit serving GPRS support node SGSN and home gateway GPRS Support Node GGSN, it is characterized in that also comprising:
The GGSN agency; Wherein,
Described user initiates the context activation request message to described SGSN, and this request message carries user totem information;
Described SGSN carries out APN according to user signing contract information and selects, and judges whether allow the user to insert, and obtains the GGSN agent address of general APN correspondence by DNS name resolution; Send context simultaneously and set up the GGSN agent address of asking to the APN correspondence;
Described GGSN acts on behalf of, and is used to resolve the message packet of reception, according to user totem information in the message, finds the GGSN address of the signatory ownership place of corresponding user, and transmits and set up solicited message to this GGSN address from the context of SGSN;
Described homing GGSN is used for setting up request message foundation according to the context that receives and is connected with the data of visit ground SGSN.
8. system according to claim 7 is characterized in that:
Described GGSN agent functionality entity is supported GPRS Tunnel Protocol.
9. system according to claim 7 is characterized in that:
Described GGSN agent functionality entity also is used for the GGSN address that user ascription area is revised as in the purpose IP address of the IP bag of the message that will receive.
10. system according to claim 7 is characterized in that:
Described user totem information is the information that comprises the unique identification user of Mobile Subscriber International ISDN number MSISDN or IMSI.
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| CN103179544B (en) * | 2011-12-26 | 2016-05-25 | 中国电信股份有限公司 | Mobile data international roaming user access method and the network equipment |
| CN103179544A (en) * | 2011-12-26 | 2013-06-26 | 中国电信股份有限公司 | Mobile data international roaming user access method and network device |
| CN103220372B (en) * | 2012-01-19 | 2016-08-10 | 中国移动通信集团公司 | Data service access method and system |
| CN103220372A (en) * | 2012-01-19 | 2013-07-24 | 中国移动通信集团公司 | Data service access method and system |
| CN104685957A (en) * | 2012-04-26 | 2015-06-03 | 比利时电信公司 | System and method for APN correction in GTP messages associated with GPRS data services offered by mobile operator using sponsor network |
| CN104685957B (en) * | 2012-04-26 | 2019-06-21 | 比利时电信公司 | The system and method for APN correction in GTP information based on the GPRS data service for using carrier network to provide |
| CN108540973A (en) * | 2013-05-14 | 2018-09-14 | 华为技术有限公司 | Data service handling method, device and system under roaming scence |
| CN108540973B (en) * | 2013-05-14 | 2021-12-14 | 华为技术有限公司 | Data service processing method, device and system in roaming scene |
| WO2014205778A1 (en) * | 2013-06-28 | 2014-12-31 | 华为技术有限公司 | Data transmission method and gateway |
| CN103918291A (en) * | 2013-06-28 | 2014-07-09 | 华为技术有限公司 | Data transmission method and gateway |
| CN103918291B (en) * | 2013-06-28 | 2018-06-05 | 华为技术有限公司 | The method and gateway of a kind of data transmission |
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