CN103220372A - Data service access method and system - Google Patents
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Abstract
The invention discloses a data service access method and system. The method includes the steps: an intelligent domain name server (DNS) is added in a general packet radio service (GPRS) network, the intelligent DNS stores a service domain name which needs to be subjected to proxy processing by a proxy server, and an internet protocol (IP) address of the proxy server is recorded at the same time; a gateway GPRS support node (GGSN) receives a programmed data processor (PDP) context activating request message sent by user equipment (UE), and the IP address of the intelligent DNS is returned to the UE; the UE launches a DNS inquiry request with a domain name of a website to be accessed to the intelligent DNS, the intelligent DNS finds out the domain name is the service domain name which needs to be subjected to proxy processing by the proxy server, the IP address of the proxy server is returned to the UE, and the UE launches a service request with a uniform resource locator (URL) to the proxy server; and the proxy server carries out the proxy processing if finding out proxy processing is needed according to target website information in the request, after the processing is finished, the proxy server sends the service request to a target website server. The data service access method and system can effectively reduce processing pressure of the proxy server and flow amount between the GGSN and the proxy server.
Description
Technical field
The present invention relates to the data service technical field, be specifically related to data service access method and system.
Background technology
In the mobile data network, usually by the different business domains of APN (APN, Access Point Name) sign, terminal is determined the mode of access mobile data services by configuration of APN, and operator separates different data communication service networks by APN.By APN mechanism, operator can be according to the needs of professional and networking, on specific APN the professional control of enforcement, route and pipeline competence for added value as: Subscriber Number insertion, user identity identification, public and private net address conversion and ALG, content charging, the Web webpage is adaptive and content caching acceleration etc.
Fig. 1 is existing APN treatment mechanism schematic diagram, and as shown in Figure 1, the APN treatment mechanism is: 1. terminal sends data channel and sets up request; 2.～3. Serving GPRS Support Node (SGSN, Serving GPRS Support Node) receives this request, check whether the APN in the request belongs to the signatory APN of user in the attaching position register (HLR, Home Location Register), if carry out subsequent step; 4.～5. SGSN is routed to the GGSN address of Gateway GPRS Support Node (GGSN, Gateway GPRS Support Node) GGSN:SGSN inquiry APN correspondence from the domain name system (DNS, Domain Name System) according to APN, go forward side by side walking along the street by; 6. GGSN is routed to specified network according to APN, and realize the content charging function: GGSN routes requests to corresponding network according to APN, as WAP (wireless application protocol) (WAP, Wireless Application Protocol), NET, at specifying APN to carry out content charging.
For better satisfied own professional and cooperative business development need, operator sets up two general APN of the whole network of WAP, NET usually, wherein WAP APN is positioned to own professional and cooperative business provide accesss, visit adaptive and value-added service, and NET APN lays particular emphasis on transparent internet (Internet) data access.
To carry out own business and cooperative business on the WAP APN in order being supported in, to provide two kinds of Operational Visit mechanism: be respectively: 1. WAP proxy mode; 2. socket (Socket) direct mode operation.Fig. 2 is existing WAP APN treatment mechanism schematic diagram, as shown in Figure 2, and wherein:
Mode is 1.: the WAP proxy mode.HTML (Hypertext Markup Language) (HTTP by WAP gateway, Hyper-Text Transfer Protocol) agent functionality, provide own professional, the professional HTTP flow proxy access of third party, and whether in the HTTP access process, insert user's calling mobile terminal number, terminal models information (UA Profile) according to set strategy decision; This mode is supported all HTTP visits, comprises own business, cooperative business and third party's business;
Mode is 2.: the Socket direct mode operation.By open white list mechanism on the fire compartment wall of WAP gateway, destination address, port are arranged in the flow of this list can directly visit public network address after the fire compartment wall mapping; This mode is supported the non-HTTP visit of credit, comprises own professional, cooperative business.
Existing network realizes that the scheme that mobile terminal number inserts is: at portable terminal packet data protocol (PDP, Packet Data Protocol) establishment stage, obtain IP address and mobile user comprehensive service digital net/public switch telephone network sign indicating number (MSISDN by GGSN, Mobile Subscriber International ISDN/PSTN Number) corresponding relation, and this corresponding relation is pushed to the WAP gateway of this GGSN correspondence; WAP gateway is preserved user's the MSISDN and the corresponding relation of IP address; When the user initiates the HTTP access request, after WAP gateway is received user HTTP packet, source IP address according to this packet, IP address and the Mobile Subscriber International ISDN Number corresponding relation preserved in the inquiry local data base, obtain this user's MSISDN, and user's MSISDN is inserted in the special field of HTTP data packet head, again this HTTP packet is forwarded, therefore business platform is after receiving user's HTTP packet, can obtain user MSISDN by the specific fields in the resolution data packet header, thereby realize identification and authentication user identity.
The flow value-added service of implementing based on WAP APN has caused problems such as carrier network complexity, dilatation cost height.In addition, distinguish different business domains by APN, the prior art scheme of different competence for added value is provided in different business domains, and there are the following problems on professional ability support, professional routing mechanism:
One, the user there is higher threshold restriction: at concrete data service, because professional networking and weight discriminating requirement, must use general packet radio service (GPRS, General Packet Radio Service) subscriber identity information that provides of network authenticates the user, at this moment, require user correct configuration of APN parameter, correctly access service platform on terminal.
Two, higher requirement has been proposed portable terminal: along with the intellectuality of portable terminal, multitask has become the basic function of new model terminal, the mobile service of supporting is more and more abundanter, normally use in order to guarantee a plurality of application, just must support that many APN are concurrent, but most of intelligent terminal platform (as: Android, iPhone etc.) does not support that all many APN are concurrent.
Three, business experience is had bigger influence: the user is not when supporting that the concurrent terminal of many APN (as: Android, iPhone, Windows Mobile etc.) goes up a plurality of business of use, owing to do not support APN concurrent, tend to cause the APN that switches to the application of running background to be disconnected, wait application to cause bigger user experience to influence the business (as: instant message, file are downloaded) that the real time access request is arranged.
Four, operation impacts with flow to the network planning of operator: operator provides different competence for added value on different APN, the business experience gap that the user obtains when using different APN is big, thereby cause complaint a large amount of and that APN is provided with, APN is concurrent, APN uses, charge on traffic is relevant, the network planning, the flow operation of operator caused obstacle.
Therefore, existing GPRS network route and APN mechanism have hindered the development of mobile Internet business.
Summary of the invention
The invention provides data service access method and system, with the processing pressure of reduction acting server and the processing pressure between acting server and the GGSN.
Technical scheme of the present invention is achieved in that
A kind of data service access method increases intelligent domain name system DNS in the general packet radio service GPRS network, intelligent DNS preserves the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously, and this method comprises:
GGSN receives the packet data protocol PDP context activation request message that user equipment (UE) is sent, and is UE distributing IP address, and returns the IP address of intelligent DNS to UE;
UE is according to the uniform resource position mark URL of the website to be visited of user's input, initiate to carry the DNS query requests of website to be visited domain name to intelligent DNS, intelligence DNS finds that this domain name is to need acting server to carry out the professional domain name of agent processes, then return the IP address of acting server, the service request that UE carries described URL to the acting server initiation to UE;
Acting server receives described service request, if find that according to the purpose site information in this request needs self carry out agent processes, then carries out agent processes, and disposing sends this service request to the purpose Website server.
Described acting server is: the WAP (wireless application protocol) WAP gateway.
Described acting server carries out agent processes and comprises: obtain subscriber identity information, subscriber identity information is inserted in this service request;
Perhaps comprise: the attribution server that obtains the user.
Described UE further comprises after intelligent DNS initiates to carry the DNS query requests of website to be visited domain name:
If intelligent DNS finds that this domain name is not for to need acting server to carry out the professional domain name of agent processes, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE, after UE receives this message, directly send service request to this data service server.
Described UE further comprises after acting server initiates to carry the service request of described URL:
Acting server receives this service request, if the purpose site information in this request of discovery is not arranged in the transmission User Identity white list that self disposes, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the professional redirect message that carries this IP address to UE, after UE receives this business redirect message, directly send service request to this data service server.
Further comprise before the PDP context activation request message that described GGSN reception UE sends:
SGSN receives this PDP context activation request message, checks the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN.
Described GGSN is that UE distributing IP address further comprises afterwards:
GGSN is registered to the user profile registrar with IP address, subscriber identity information, the roaming position of UE;
Described acting server obtains subscriber identity information: acting server inquires corresponding subscriber identity information according to the source IP address of service request to the user profile registrar;
The attribution server that described acting server obtains the user is: acting server inquires corresponding subscriber identity information or roaming position according to the source IP address of service request to the user profile registrar, according to User Identity or roaming position, while is according to the domain name of the purpose website in the service request, inquire user's attribution server to Enum DNS, so that this service request is sent to this attribution server.
Described business is based on business transmission control protocol TCP carrying, that use text type control protocol.
A kind of data service access system comprises:
Intelligence DNS: preserve the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously; Receive the DNS query requests of carrying website to be visited domain name that UE sends, carry out the professional domain name of agent processes for needing acting server, then return the IP address of acting server, so that initiate service request to this acting server to UE to UE if find this domain name;
GGSN: receive the PDP context activation request message that UE sends, be UE distributing IP address, and return the IP address of intelligent DNS to UE;
Acting server: receive the described service request that UE sends, if find that according to the purpose site information in this request needs self carry out agent processes, then carry out agent processes, disposing sends this service request to the purpose Website server.
Described intelligent DNS is further used for, after receiving the DNS query requests of carrying website to be visited domain name that UE sends, if find that this domain name is not for to need acting server to carry out the professional domain name of agent processes, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
Described acting server is further used for, after receiving the described service request that UE sends, if the purpose site information in this request of discovery is not arranged in the transmission User Identity white list that self disposes, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the professional redirect message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
Described system further comprises: SGSN, be used to receive the described PDP context activation request message that UE sends, check the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN.
Described GGSN is further used for, and after being UE distributing IP address, IP address and the subscriber identity information of UE is registered to the user profile registrar;
And described acting server is further used for, when finding that according to the purpose site information in the described service request needs carry out agent processes, source IP address according to described service request inquires corresponding subscriber identity information to the user profile registrar, and this subscriber identity information is inserted in this service request;
Perhaps be further used for, when finding that according to the purpose site information in the described service request needs carry out agent processes, source IP address according to service request inquires corresponding subscriber identity information or roaming position to the user profile registrar, according to User Identity or roaming position, while is according to the domain name of the purpose website in the service request, inquire user's attribution server to Enum DNS, so that this service request is sent to this attribution server.
A kind of intelligent DNS is arranged in GPRS network, comprising:
First module: preserve the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously;
Second module: receive the DNS query requests of carrying website to be visited domain name that UE sends, carry out the professional domain name of agent processes if inquire this domain name for needing acting server to first module, then return the IP address of acting server, so that UE initiates service request to acting server to UE.
Described second module is further used for, after receiving the DNS query requests of carrying website to be visited domain name that UE sends, do not carry out the professional domain name of agent processes if inquire this domain name for needing acting server to first module, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
A kind of GGSN comprises:
Three module: receive the PDP context activation request message that UE sends, be UE distributing IP address, and return the IP address of intelligent DNS to UE;
Four module: receive the service request that UE sends,, then this request is sent to acting server if the purpose IP address of this request of discovery is the IP address of acting server; Otherwise, should ask directly to send to the destination data service server.
Described three module is further used for, and after having distributed the IP address for UE, IP address and the subscriber identity information of UE is registered to the user profile registrar, so that WAP gateway is according to IP address lookup subscriber identity information or the roaming position of UE.
A kind of acting server comprises:
The 5th module: receive the service request that UE sends, if find that according to the purpose site information in this request needs self carry out agent processes, then obtain subscriber identity information, subscriber identity information is inserted in this service request, send this service request to the purpose Website server; Perhaps obtain subscriber identity information or roaming position, according to subscriber identity information or roaming position, simultaneously according to the domain name of the purpose website in the service request, inquire user's attribution server to ENUM DNS, send this service request to user's attribution server.
Described the 5th module is further used for, after receiving the described service request that UE sends, if the purpose site information in this request of discovery is not arranged in the transmission User Identity white list that self disposes, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the professional redirect message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
A kind of SGSN comprises:
The 6th module: receive the PDP context activation request message that UE sends, check the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN.
Compared with prior art, among the present invention, the service request that only will need acting server to carry out agent processes has sent to acting server through GGSN, and the service request that does not need acting server to carry out agent processes has all directly sent the destination data service server to without acting server, thereby reduced the processing pressure of acting server, reduce the flow between GGSN and the acting server, reduced professional transmission cost; And need not the IP address of Configuration Agent server on UE.
In addition, in the embodiment of the invention,, make the user on terminal, during correct configuration of APN, perhaps, when terminal does not support that many APN are concurrent, still can successfully not carry out agent processes, improved user experience by the APN error correction of SGSN.
Description of drawings
Fig. 1 is existing APN treatment mechanism schematic diagram;
Fig. 2 is existing WAP APN treatment mechanism schematic diagram;
The data service access method flow chart that Fig. 3 provides for the embodiment of the invention;
The message flow schematic diagram of the data service access method that Fig. 4 provides for the embodiment of the invention one;
The composition schematic diagram of the data service access system that Fig. 5 provides for the embodiment of the invention;
The composition schematic diagram of the intelligent DNS that Fig. 6 provides for the embodiment of the invention.
Embodiment
The present invention is further described in more detail below in conjunction with drawings and the specific embodiments.
The data service access method flow chart that Fig. 3 provides for the embodiment of the invention, as shown in Figure 3, its concrete steps are as follows:
Step 300: increase intelligent DNS in general packet radio service (GPRS, General Packet Radio Service) network, intelligent DNS preserves the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously.
Here, can be the different different acting servers of professional domain name configuration.
Step 301:GGSN receives the PDP context activation request message that subscriber equipment (UE, User Equipment) is sent, and is UE distributing IP address, and returns the IP address of intelligent DNS to UE.
Step 302:UE initiates to carry the DNS query requests of website to be visited domain name according to the URL(uniform resource locator) (URL, Uniform Resource Locator) of the website to be visited of user's input to intelligent DNS.
Step 303: intelligent DNS finds that website to be visited domain name is the professional domain name that the need acting server carries out agent processes, then returns the IP address of acting server to UE.
The service request that step 304:UE carries the URL of website to be visited to the acting server initiation.
Step 305: acting server receives this service request, if find that according to the purpose site information in this request needs self carry out agent processes, then carries out agent processes, and disposing sends this service request to the purpose Website server.
Wherein, the business of mentioning embodiment illustrated in fig. 3 is based on transmission control protocol (TCP, Transmission Control Protocol) business carrying, that use text type control protocol, as: HTTP business, real-time streaming protocol (RTSP, Real Time Streaming Protocol) business.
Wherein, acting server can be a WAP gateway, and the agent processes that acting server carries out can be to obtain and insert User Identity, obtain user's attribution server etc.
The message flow schematic diagram of the data service access method that Fig. 4 provides for the embodiment of the invention one, the agent processes that acting server carries out in the present embodiment is to obtain and insert User Identity, as shown in Figure 4, its concrete steps are as follows:
Step 400: at general packet radio service (GPRS, General Packet Radio Service) increases intelligent DNS in the network, on intelligent DNS, dispose dns database, be used to preserve the domain name that needs the WAP agency, on intelligent DNS, dispose A record data, the IP address that is used to write down WAP gateway simultaneously.
Step 401: subscriber equipment (UE, User Equipment) connects setting based on the data of self, sends the PDP context activation request message to network side.
Here, data connect the setting that setting promptly inserts GPRS network.
Step 402:SGSN receives this PDP context activation request message, checks the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then is set to correct APN according to pre-defined rule APN.
SGSN can be in advance according to user type, terminal type etc., for dissimilar users, dissimilar terminals are provided with different APN, and the corresponding relation of promptly pre-configured user type sign, terminal type identification etc. and APN.When receiving the PDP context activation request message, in this message APN is not set if find, perhaps, find that the APN in this message is not legal AP N, then in pre-configured, inquire about corresponding APN according to user type sign, terminal type identification etc., the APN that this inquires is set in this message, perhaps the APN in this message is replaced with the APN that inquires.
Step 403:SGSN is transmitted to GGSN with this PDP context activation request message.
Step 404:GGSN receives this PDP context activation request message, be UE distributing IP address, and to user profile registrar transmission access request message, as: send the remote customer dialing authentication (RADIUS of system at CMWAP APN to WAP gateway, Remote Authentication Dial In User Service) roaming position, User Identity that message, this message comprise IP address, the UE of UE is as mobile terminal number, GGSN sign etc.
Step 405: the user profile registrar receives this access request message, at first according to the sign of the GGSN in this message GGSN is authenticated through the access control module, authentication is checked the data in the database according to User Identity and the IP address of the UE in this message by the back, upgrade, concrete operations are: inquire about the User Identity of the UE in this message and IP address whether in database, if, according to the User Identity of this UE and IP address new database more, if not, then database is inserted as new record list item in User Identity and the IP address of this UE; Return the access response message of indication network connection subsequently to GGSN.
Step 406～407:GGSN receives this access response message, returns PDP context activation success response message through SGSN to UE, is included as this UE IP address allocated, intelligent dns address in this response message.So far UE has possessed the condition of visit data service server.
Step 408: the user is opening a URL(uniform resource locator) (URL, Uniform Resource Locator) of using or import website to be visited in browser on the UE.
Step 409:UE obtains the domain name of website to be visited according to user URL to be visited, and the intelligent DNS that GGSN returns in step 407 initiates to carry the DNS inquiry request message of this domain name.
Step 410～411: intelligent DNS receives this DNS inquiry request message, inquire about the dns database of self, if find that the domain name in this message is the domain name that need carry out the WAP agency, then in the A record data that self dispose, find the IP address of WAP gateway, return the DNS query response message to UE, this message is carried the IP address that the domain name mapping result is a WAP gateway.
When the domain name that do not find in the dns database of intelligent DNS at self in this message, if obtained the IP address of the destination data service server of this domain name correspondence before the intelligent DNS from the DNS of Internet, then intelligent DNS can keep the corresponding relation of the IP address of this domain name and this data service server in buffer memory, therefore, this moment, intelligent DNS can inquire about this domain name earlier in buffer memory, if inquire, then can directly obtain the IP address of destination data service server; Otherwise, initiate domain name recursive query request message to the DNS of Internet again.When intelligence DNS inquires the IP address of destination data service server, can return the DNS query response message to UE, this message is carried the IP address of destination data service server, after UE receives this IP address, initiates the HTTP request message to this IP address.
Step 412:UE receives this DNS query response message, with the IP address of the WAP gateway in this message destination address as the HTTP request message, and in the host of the URL of message part, insert the domain name of data service server, send this HTTP request message to WAP gateway.
The URL of HTTP request message is the URL of the website to be visited of user's input in the step 408, and the domain name of the data service server in the host part of the URL of HTTP request message is the domain name of website to be visited in the step 409.
Step 413:SGSN receives this HTTP request message, and this message is sent to GGSN, and GGSN receives this message, and the destination address of finding this message is the IP address of WAP gateway, then this message is sent to WAP gateway.
For destination address is not the HTTP request message of WAP gateway, and GGSN can not send to WAP gateway with this message, but directly is sent to destination server; Equally, for non-HTTP message, GGSN also can directly be sent to destination server.
Step 414:WAP gateway receives this HTTP request message, inquire about whether site information to be visited is arranged in the white list that transmits User Identity in this message, if, send the subscriber identity information inquiry request message to the user profile registrar, the source IP address that this message is carried the HTTP request message is the IP address of UE.
Here, site information to be visited can be the URL of website to be visited, perhaps, when the Host of HTTP request message partly is the domain name of website to be visited, the site information to be visited here can be the domain name of website to be visited, when the Host of HTTP request message partly was the IP address of website to be visited, the site information to be visited here can be the IP address of website to be visited.
Step 415:WAP gateway receives the subscriber identity information query response message that carries the UE User Identity that the user profile registrar returns, and inserts User Identity according to predetermined WAP proxy policies in the HTTP request message.
Here, predetermined WAP proxy policies can be same as the prior art.
User Identity can be the MSISDN of UE etc., also can be according to other expression after the predetermined WAP proxy policies conversion.
Step 416:WAP gateway sends this HTTP request message as acting server to the Host of HTTP request message part destination address pointed.
In this step, WAP gateway at first will be to the IP address of the domain name correspondence in the Host part of the DNS of Internet inquiry HTTP request message, this IP address is the IP address of destination data service server, after inquiring, sends this HTTP request message to this IP address.
Step 417～418: data service server receives this HTTP request message, confirming under the prerequisite of this message from WAP gateway, confirm user identity according to the User Identity in the message, obtain business tine then, business tine is put into http response message send to WAP gateway.
Here, confirm that this HTTP request message from WAP gateway can be: trust the IP address of WAP gateway or set up secure transmission tunnel with WAP gateway, etc.
Whether step 419:WAP gateway receives this http response message, according to predetermined policy, to need to confirm http response message is handled as compression or protocol adaptation, if need, then carries out respective handling.
Step 420:WAP gateway is transmitted this http response message to UE.
When act on behalf of server as: the agent processes that WAP gateway carries out is when obtaining user's attribution server, and the handling process and the difference of flow process shown in Figure 4 of this moment are as follows:
Step 415 changes to: behind the subscriber identity information query response message that carries the UE User Identity that WAP gateway reception user profile registrar returns, according to the domain name of the website to be visited in this User Identity and the HTTP request, inquire user's attribution server to ENUM DNS.
Perhaps, the subscriber identity information query response message in this step can further carry the roaming position of UE, and WAP gateway inquires user's attribution server according to the roaming position of UE and the domain name of the website to be visited in the HTTP request to ENUM DNS.
Simultaneously, step 416 changes to: WAP gateway is as acting server, sends this HTTP request message to user's attribution server.
Simultaneously, the data service server in step 417～418 is: user's attribution server.
From enforcement shown in Figure 4 as can be seen: when the user initiates an Operational Visit, whether UE can elder generation be the domain name that need carry out the WAP agency to the domain name that intelligent DNS inquires about website to be visited, if, directly the destination address of HTTP request message is extended this as the IP address of WAP gateway, and the domain name of in the host part of the URL of HTTP request message, filling in the destination data service server; Otherwise, the destination address of HTTP request message is extended this as the domain name of destination data service server, thereby make: the HTTP request of only needs being carried out the WAP agency has sent to WAP gateway through GGSN, and HTTP request and the non-HTTP request that need not carry out the WAP agency have all directly sent the destination data service server to without WAP gateway, thereby reduced the processing pressure of WAP gateway, reduce the flow between GGSN and the WAP gateway, reduced professional transmission cost.
The composition schematic diagram of the data service access system that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, it mainly comprises: UE51, SGSN52, GGSN53, intelligent DNS54, user profile registrar 55, acting server 56, data service server 57, wherein:
UE51: the data based on self connect setting, send the PDP context activation request message to network side; When the user has opened an application or imported the URL of website to be visited in browser, obtain the domain name of website to be visited, and initiate to carry the DNS inquiry request message of this domain name to intelligent DNS54, receive the DNS query response message that intelligent DNS54 returns, with the IP address of the acting server in this message destination address as the HTTP request message, and in the host of the URL of message part, insert the domain name of website to be visited, send these HTTP request messages to acting server 56.
SGSN52: receive the PDP context activation request message that UE51 sends, check the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then be set to correct APN according to pre-defined rule APN, this PDP context activation request message is transmitted to GGSN53; Receive the HTTP request message that UE51 sends, this message is sent to GGSN53.
GGSN53: receive SGSN52 and transmit the PDP context activation request message of coming from UE51, be UE distributing IP address, and to user profile registrar 55 transmission access request message, this message comprises the IP address of UE, the roaming position of UE, User Identity is as mobile terminal number, GGSN sign etc., the access response message of the indication network connection that reception user profile registrar 55 returns, return PDP context activation success response message through SGSN52 to UE51, be included as this UE51 IP address allocated in this response message, the IP address of intelligence DNS54; Receive SGSN52 and transmit the HTTP request message of coming,, then this message is sent to acting server 56 if find that the destination address of this message is the IP address of acting server.
Intelligence DNS54: dispose dns database, being used to preserve needs acting server to carry out the professional domain name of agent processes, disposes the A record data simultaneously, is used to write down the IP address of acting server; Receive the DNS inquiry request message that UE51 sends, inquire about the dns database of self, if find that the domain name in this message is to need acting server to carry out the domain name of agent processes, then in the A record data that self dispose, find the IP address of acting server 56, return the DNS query response message to UE51, this message is carried the IP address that the domain name mapping result is an acting server 56.
Intelligence DNS54 is further used for, after receiving the DNS inquiry request message that carries website to be visited domain name that UE51 sends, if find that this domain name is not for to need acting server to carry out the professional domain name of agent processes, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE51, so that UE51 directly sends the HTTP request message to this data service server without acting server.
User profile registrar 55: receive the access request message that GGSN53 sends, according to the sign of the GGSN in this message GGSN is authenticated, authentication is checked, is upgraded the data in the database according to User Identity and the IP address of the UE in this message by the back, returns the access response message of indication network connection subsequently to GGSN53; Receive the subscriber identity information inquiry request message that acting server 56 is sent, inquire about the User Identity of the IP address correspondence of the UE in this message, this User Identity is carried at returns to acting server 56 in the subscriber identity information query response message.
Acting server 56: receive GGSN53 and transmit the HTTP request message of coming, inquire about whether site information to be visited is arranged in the white list that transmits User Identity in this message, if, send the subscriber identity information inquiry request message to user profile registrar 55, the source IP address that this message is carried the HTTP request message is the IP address of UE, receive the subscriber identity information query response message that carries the UE User Identity that user profile registrar 55 returns, carry out agent processes according to predetermined proxy policies, dispose as acting server, send this HTTP request message to the data service server of HTTP request message; Receive the http response message that data service server 57 is sent, transmit this message to UE51.
Acting server 56 is further used for, when receiving the HTTP request message of GGSN53 forwarding, be not arranged in the transmission User Identity white list that self disposes if find the site information to be visited in this message, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the HTTP redirection message of carrying this IP address to UE51, so that UE51 directly sends the HTTP request message to this data service server without acting server 56.
Data service server 57: receive the HTTP request message that acting server 56 is sent, confirming under the prerequisite of this message from acting server 56, confirm user identity according to the User Identity in the message, obtain business tine then, business tine is put into http response message send to acting server 56.
The composition schematic diagram of the intelligent DNS that is arranged in GPRS network that Fig. 6 provides for the embodiment of the invention, as shown in Figure 6, it mainly comprises: first module 541 and second module 542, wherein:
First module 541: preserve the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously.
Second module 542: receive the DNS inquiry request message that carries website to be visited domain name that UE51 sends, whether to first module, 541 these domain names of inquiry is to need acting server to carry out the professional domain name of agent processes, if, return the DNS query response message of the IP address of carrying acting server to UE51, so that UE51 initiates the HTTP request to acting server 56; Otherwise, inquire about the IP address of this domain name correspondence to the DNS of Internet, this IP address is carried at the DNS query response message returns to UE51.
Below provide the composition of the GGSN that the embodiment of the invention provides, it mainly comprises: three module and four module, wherein:
Three module: receive SGSN52 and transmit the PDP context activation request message of coming from UE51, be UE distributing IP address, and to user profile registrar 55 transmission access request message, this message comprises the IP address of UE, the roaming position of UE, User Identity is as mobile terminal number, GGSN sign etc., the access response message of the indication network connection that reception user profile registrar 55 returns, return PDP context activation success response message through SGSN52 to UE51, be included as this UE51 IP address allocated in this response message, the IP address of intelligence DNS54.
Four module: receive SGSN52 and transmit the HTTP request message of coming,, then this message is sent to acting server 56 if find that the destination address of this message is the IP address of acting server; Otherwise, directly this message is sent to destination server without acting server.
Below provide the composition of the acting server that the embodiment of the invention provides, this acting server mainly comprises: the 5th module, be used to receive GGSN53 and transmit the HTTP request message of coming from UE51, if find that according to the purpose site information in this request message the needs acting server carries out agent processes, then the source IP address according to this message obtains corresponding subscriber identity information from user profile registrar 55, carry out agent processes according to predetermined policy, disposing sends this HTTP request message to destination data service server 57.
Below provide the composition of the SGSN that the embodiment of the invention provides, this SGSN mainly comprises: the 6th module, be used to receive the PDP context activation request message that UE51 sends, check the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN53.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (20)
1. data service access method, it is characterized in that increase intelligent domain name system DNS in the general packet radio service GPRS network, intelligent DNS preserves needs acting server to carry out the professional domain name of agent processes, write down the IP address of acting server simultaneously, this method comprises:
GGSN receives the packet data protocol PDP context activation request message that user equipment (UE) is sent, and is UE distributing IP address, and returns the IP address of intelligent DNS to UE;
UE is according to the uniform resource position mark URL of the website to be visited of user's input, initiate to carry the DNS query requests of website to be visited domain name to intelligent DNS, intelligence DNS finds that this domain name is to need acting server to carry out the professional domain name of agent processes, then return the IP address of acting server, the service request that UE carries described URL to the acting server initiation to UE;
Acting server receives described service request, if find that according to the purpose site information in this request needs self carry out agent processes, then carries out agent processes, and disposing sends this service request to the purpose Website server.
2. method according to claim 1 is characterized in that, described acting server is: the WAP (wireless application protocol) WAP gateway.
3. method according to claim 1 is characterized in that, described acting server carries out agent processes and comprises: obtain subscriber identity information, subscriber identity information is inserted in this service request;
Perhaps comprise: the attribution server that obtains the user.
4. method according to claim 1 is characterized in that, described UE further comprises after intelligent DNS initiates to carry the DNS query requests of website to be visited domain name:
If intelligent DNS finds that this domain name is not for to need acting server to carry out the professional domain name of agent processes, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE, after UE receives this message, directly send service request to this data service server.
5. method according to claim 1 is characterized in that, described UE further comprises after acting server initiates to carry the service request of described URL:
Acting server receives this service request, if the purpose site information in this request of discovery is not arranged in the transmission User Identity white list that self disposes, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the professional redirect message that carries this IP address to UE, after UE receives this business redirect message, directly send service request to this data service server.
6. method according to claim 1 is characterized in that, further comprises before the PDP context activation request message that described GGSN reception UE sends:
SGSN receives this PDP context activation request message, checks the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN.
7. method according to claim 3 is characterized in that, described GGSN is that UE distributing IP address further comprises afterwards:
GGSN is registered to the user profile registrar with IP address, subscriber identity information, the roaming position of UE;
Described acting server obtains subscriber identity information: acting server inquires corresponding subscriber identity information according to the source IP address of service request to the user profile registrar;
The attribution server that described acting server obtains the user is: acting server inquires corresponding subscriber identity information or roaming position according to the source IP address of service request to the user profile registrar, according to User Identity or roaming position, while is according to the domain name of the purpose website in the service request, inquire user's attribution server to Enum DNS, so that this service request is sent to this attribution server.
8. according to the arbitrary described method of claim 1 to 7, it is characterized in that described business is based on business transmission control protocol TCP carrying, that use text type control protocol.
9. a data service access system is characterized in that, comprising:
Intelligence DNS: preserve the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously; Receive the DNS query requests of carrying website to be visited domain name that UE sends, carry out the professional domain name of agent processes for needing acting server, then return the IP address of acting server, so that initiate service request to this acting server to UE to UE if find this domain name;
GGSN: receive the PDP context activation request message that UE sends, be UE distributing IP address, and return the IP address of intelligent DNS to UE;
Acting server: receive the described service request that UE sends, if find that according to the purpose site information in this request needs self carry out agent processes, then carry out agent processes, disposing sends this service request to the purpose Website server.
10. system as claimed in claim 9, it is characterized in that, described intelligent DNS is further used for, after receiving the DNS query requests of carrying website to be visited domain name that UE sends, if find that this domain name is not for to need acting server to carry out the professional domain name of agent processes, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
11. system according to claim 9, it is characterized in that, described acting server is further used for, after receiving the described service request that UE sends, if the purpose site information in this request of discovery is not arranged in the transmission User Identity white list that self disposes, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the professional redirect message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
12. system according to claim 9, it is characterized in that, described system further comprises: SGSN, be used to receive the described PDP context activation request message that UE sends, check the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN.
13. system according to claim 9 is characterized in that, described GGSN is further used for, and after being UE distributing IP address, IP address and the subscriber identity information of UE is registered to the user profile registrar;
And described acting server is further used for, when finding that according to the purpose site information in the described service request needs carry out agent processes, source IP address according to described service request inquires corresponding subscriber identity information to the user profile registrar, and this subscriber identity information is inserted in this service request;
Perhaps be further used for, when finding that according to the purpose site information in the described service request needs carry out agent processes, source IP address according to service request inquires corresponding subscriber identity information or roaming position to the user profile registrar, according to User Identity or roaming position, while is according to the domain name of the purpose website in the service request, inquire user's attribution server to Enum DNS, so that this service request is sent to this attribution server.
14. an intelligent DNS is arranged in GPRS network, it is characterized in that, comprising:
First module: preserve the professional domain name that the need acting server carries out agent processes, the IP address of writing down acting server simultaneously;
Second module: receive the DNS query requests of carrying website to be visited domain name that UE sends, carry out the professional domain name of agent processes if inquire this domain name for needing acting server to first module, then return the IP address of acting server, so that UE initiates service request to acting server to UE.
15. intelligent DNS according to claim 14, it is characterized in that, described second module is further used for, after receiving the DNS query requests of carrying website to be visited domain name that UE sends, do not carry out the professional domain name of agent processes if inquire this domain name for needing acting server to first module, then inquire about the IP address of the destination data service server of this domain name correspondence to the DNS of internet, return the DNS query response message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
16. a GGSN is characterized in that, comprising:
Three module: receive the PDP context activation request message that UE sends, be UE distributing IP address, and return the IP address of intelligent DNS to UE;
Four module: receive the service request that UE sends,, then this request is sent to acting server if the purpose IP address of this request of discovery is the IP address of acting server; Otherwise, should ask directly to send to the destination data service server.
17. GGSN according to claim 16, it is characterized in that, described three module is further used for, after having distributed the IP address for UE, IP address and the subscriber identity information of UE are registered to the user profile registrar, so that WAP gateway is according to IP address lookup subscriber identity information or the roaming position of UE.
18. an acting server is characterized in that, comprising:
The 5th module: receive the service request that UE sends, if find that according to the purpose site information in this request needs self carry out agent processes, then obtain subscriber identity information, subscriber identity information is inserted in this service request, send this service request to the purpose Website server; Perhaps obtain subscriber identity information or roaming position, according to subscriber identity information or roaming position, simultaneously according to the domain name of the purpose website in the service request, inquire user's attribution server to ENUM DNS, send this service request to user's attribution server.
19. acting server according to claim 18, it is characterized in that, described the 5th module is further used for, after receiving the described service request that UE sends, if the purpose site information in this request of discovery is not arranged in the transmission User Identity white list that self disposes, then inquire about the IP address of destination data service server of the domain name correspondence of this URL to the DNS of internet, return the professional redirect message that carries this IP address to UE, so that UE directly sends service request to this data service server without acting server.
20. a SGSN is characterized in that, comprising:
The 6th module: receive the PDP context activation request message that UE sends, check the setting of the APN in the PDP activation parameter of this message, if APN is not provided with or is provided with mistake, then APN is set to correct APN, and this PDP context activation request message is transmitted to GGSN.
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