CN103220371B - Content adaptation method and system - Google Patents

Abstract

The invention discloses a content adaptation method and system. The method includes: the smart DNS saves the domain name that needs content adaptation, and records the IP address of the adaptation server corresponding to the domain name; the terminal supports the network element to return the IP address of the smart DNS to the UE; the UE initiates to the smart DNS to carry the website to be visited The DNS query request of the domain name, the smart DNS finds that the domain name needs content adaptation, returns the IP address of the adaptation server to the UE, and the UE initiates a service request to the adaptation server; the adaptation server performs content adaptation on the web page returned by the data service server , and at the same time, modify each URL link embedded on the webpage that needs content adaptation to: use this URL as the destination website URL parameter of the modified URL, and concatenate the URL of the adaptation server with this parameter, and obtain the modified URL, and send the webpage to the UE. Wherein, the service is a service carried by TCP and using a text-based control protocol. The invention reduces network time delay and network element overhead.

Description

Content adaptation method and system

technical field

The invention relates to the technical field of data services, in particular to a content adaptation method and system.

Background technique

With the rapid development of the mobile Internet and the widespread popularization of smart terminals, users have increasingly strong demands for accessing the Internet anytime, anywhere using devices such as mobile phones and PADs. However, the pages of most websites on the Internet are designed according to the screen size and operating habits of a personal computer (PC, Personal Computer). Due to the limitations of the screen size, resolution, memory, power consumption, etc. When using a browser to access these websites, the user experience is poor, which is mainly reflected in: the layout of the webpage is not suitable for browsing and operation, the large data traffic of the webpage leads to the slow opening speed of the page, and the terminal does not support specific format content. For example: iPhone does not support flash memory (flash ) format digital content.

In addition, with the popularity of mobile terminals with built-in wireless local area network (WLAN, Wireless Local Area Network) modules and operators vigorously developing WLAN access services, mobile terminals using WLAN to access the Internet are increasingly popular. Although bandwidth is no longer the key factor in the case of WLAN access, limited by the processing and display capabilities of the terminal, it is still necessary to adapt the format of the pages accessed by the mobile terminal when surfing the Internet, so as to improve the user's browsing experience from the mobile terminal. web page experience.

In addition, content processing (such as advertisement insertion, prompt page pop-up) and information filtering (such as scanning malicious script codes and preventing the spread of virus content) on the pages accessed by the terminal are also the means for operators to carry out business promotion and marketing to ensure users' online security. basic requirements.

The idea of webpage adaptation is: set up an adaptation server on the network side, and carry out targeted processing on webpages and digital content according to the display characteristics and processing capabilities of the terminal, such as: changing the page layout, changing the font size, changing the content of pictures and videos Format and size, so as to quickly and effectively display on the terminal; delete or add specified digital content for business promotion and marketing; content scanning for web page scripts, attachments, etc., so that users can use the network and business more safely.

In a mobile data network, usually access point names (APN, AccessPointName) are used to identify different service domains. Terminals configure APNs to determine how to access mobile data services. Operators use APNs to separate different data communication service networks. Through the APN mechanism, operators can implement service control, routing and pipeline value-added capabilities on specific APNs according to business and networking needs, such as: user number insertion, user identification, public-private network address translation and application layer gateway, content accounting fees, Web page adaptation, and content cache acceleration.

In order to better meet the development needs of self-owned and cooperative services, operators usually set up two APNs, Wireless Application Protocol (WAP, Wireless Application Protocol) and NET, which are common throughout the network. Access adaptation and value-added services, while NETAPN focuses on transparent Internet (Internet) data access.

Figure 1 shows a schematic diagram of the existing content adaptation mechanism based on WAP gateway proxy. As shown in Figure 1, WAPAPN provides the functions of mobile terminal number insertion and content billing, and according to the needs of terminal web browsing, Provides format adaptation to Internet Web pages to improve the effect of web page browsing.

The process of realizing web page content adaptation in the existing network is as follows: on the mobile terminal, WAPAPN is used to establish a packet data protocol (PDP, Packet Data Protocol) connection, and the user's web browsing request first arrives at the WAP gateway through the General Packet Radio Service (GPRS, General Packet Radio Service) network, and the The WAP gateway analyzes the Uniform Resource Locator (URL, UniformResourceLocator) of the website visited by the terminal and the User Agent (User-Agent) of the terminal, and uses the Hypertext Transfer Protocol (HTTP, Hyper-TextTransferProtocol) proxy mode to process the HTTP content that needs to be adapted. The request is forwarded to the adaptation server; the adaptation server adopts the proxy mode, first obtains the content of the web page that the user wants to visit from the source website, then rearranges and compresses the web page according to the established adaptation algorithm and rules, and then responds to the mobile terminal.

For a terminal connected to a wired network or WLAN, there is no concept of APN when surfing the Internet. Therefore, in order to process content, a network element with deep packet inspection function must be added on the network side. Figure 2 shows a schematic diagram of the existing content processing mechanism based on deep packet inspection. As shown in Figure 2, the deep packet inspection network element is used to filter user requests and responses that need to be Handle server processing.

There are following problems in user experience and system overhead in the prior art solution adapted by WAP gateway agent:

1. The user experience is greatly reduced

The WAP gateway and the adaptation server acted as the proxy of the destination server respectively, and performed two HTTP termination and establishment processes. Therefore, when the user visits the source website, the access delay will be greatly increased; in addition, due to the adaptation strategy of the WAP gateway When users access the same website using different terminals, different access methods, and different browsers, there are two versions: adapted and unadapted, and the experience is quite different.

2. The system overhead of the operator is relatively large

As mentioned in 1, two proxying means double server processing overhead; moreover, the WAP gateway itself does not have the ability to judge content adaptation, so it can only select the content that satisfies the conditions according to the terminal type, wireless access method, browser type, etc. All traffic is forwarded to the adaptation server. After the adaptation server judges, it only performs adaptation work on the websites in the URL whitelist. According to empirical data, the total amount of adaptation cannot reach the total traffic flowing through the adaptation server. 30%, which also increases the cost of the adaptation server; in addition, the adaptation server needs to disassemble the packets one by one and match the URL to determine whether to perform content adaptation. Large processing overhead.

The existing technical solution through deep packet inspection has the following problems in terms of user experience and system overhead:

1. The user experience is greatly reduced. The deep packet inspection equipment needs to process packets one by one, which introduces additional processing delay and packet loss rate. Therefore, when users visit websites, the access delay and failure rate will greatly increase.

Second, the operator's system overhead is relatively large. The high cost of deep packet inspection equipment brings additional procurement, operation and maintenance costs.

Contents of the invention

The invention provides a content adaptation method and system, an intelligent DNS and an adaptation server to reduce network delay and network element overhead.

Technical scheme of the present invention is realized like this:

A content adaptation method, adding an intelligent domain name system DNS in a data communication service network, the intelligent DNS stores domain names that need content adaptation, and simultaneously records the IP address of an adaptation server corresponding to the domain name, the method comprising:

Terminal Internet access supports the network element to receive the packet data protocol PDP context activation request message sent by the user equipment UE, and return the IP address of the smart DNS to the UE; the UE initiates the porting to the smart DNS according to the uniform resource locator URL of the website to be visited entered by the user. For the DNS query request of the website domain name to be accessed, the smart DNS finds that the domain name is a domain name that requires content adaptation, and then returns the IP address of the adaptation server to the UE, and the UE initiates a service request carrying the URL to the adaptation server;

The adaptation server receives the service request, and if it finds that the content of the webpage to be accessed by the user needs to be adapted, it sends a service request to the data service server, and performs content adaptation on the webpage returned by the data service server, and at the same time, The embedded URL links that need content adaptation are modified to: use this URL as the target website URL parameter of the modified URL, and concatenate the URL of the adaptation server with this parameter to obtain the modified URL. The web page is sent to UE,

The service is based on the transmission control protocol TCP and uses a text-based control protocol.

The data communication service network is a mobile data network or a wireless local area network (WLAN).

After the UE initiates a DNS query request carrying the domain name of the website to be visited to the smart DNS, it further includes:

If the smart DNS finds that the domain name is a domain name that does not require content adaptation, it will query the DNS of the Internet for the IP address of the data service server corresponding to the domain name, and return a service redirection message carrying the IP address to the UE, and the UE receives the IP address. After the service redirection message, directly send the service request to the data service server.

After the UE initiates the service request carrying the URL to the adaptation server, it further includes:

The adaptation server adapts the whitelist according to the content configured by itself. If it finds that it is not necessary to adapt the content of the webpage to be accessed by the user, it queries the DNS of the Internet for the IP address of the data service server corresponding to the domain name of the URL, and returns the IP address of the data service server carrying the URL to the UE. The service redirection message of the IP address, after receiving the service redirection message, the UE directly sends a service request to the data service server.

After the adaptation server sends the webpage to the UE, it further includes:

When the UE detects that the user clicks a URL link embedded in the webpage, the UE sends a service request containing the URL, and the request reaches the adaptation server, and the adaptation server parses the URL parameters of the destination website from the URL of the request , obtain the URL of the website to be visited by the user, query the IP address corresponding to the domain name of the URL from the DNS of the Internet, initiate a service request to the IP address, the data service server receives the service request information, and obtains the web page content corresponding to the URL in the request , and forward the webpage content to the adaptation server, and the adaptation server performs content adaptation on the webpage content and returns it to the UE.

When the data communication service network is a mobile data network, the network elements supporting the terminal's Internet access are: a radio network controller RNC, a serving GPRS support node SGSN, and a gateway GPRS support node GGSN;

When the data communication service network is a WLAN, the network elements supporting the terminal's Internet access include: an access controller AC and an access point AP.

The adaptation server discovers that it is necessary to adapt the content of the webpage to be accessed by the user, including:

The adaptation server determines whether to adapt the content of the webpage to be accessed by the user based on the UA parameter of the UE;

Or, the adaptation server determines whether to adapt the content of the webpage to be accessed by the user based on the domain name of the website to be accessed by the user;

Alternatively, the adaptation server determines whether to adapt the content of the web page to be accessed by the user based on the URL of the website to be accessed by the user.

The service based on the TCP bearer and using the text-type control protocol is: a hypertext transfer protocol HTTP service, or a real-time streaming protocol RTSP service.

A content adaptation system comprising:

Terminal network support network element: receive the PDP context activation request message sent by the UE, and return the IP address of the smart DNS to the UE;

Smart DNS: save the domain name that needs content adaptation, and record the IP address of the adaptation server corresponding to the domain name; receive the DNS query request from the UE that carries the domain name of the website to be accessed If the configured domain name is configured, the IP address of the adaptation server is returned to the UE, so that the UE initiates a service request carrying the URL of the website to be visited to the adaptation server, and the service is a service based on TCP and using a text-based control protocol;

Adaptation server: Receives the service request sent by the UE. When it finds that the request does not carry the URL parameter of the destination website, and finds that the content of the webpage to be accessed by the user needs to be adapted, it sends a service request to the data service server and performs data service The webpage returned by the server is adapted to the content, and at the same time, each URL link embedded in the webpage that needs to be adapted to the content is modified to: use this URL as the URL parameter of the destination website of the modified URL, and adapt the URL of the server The parameter is concatenated to obtain a modified URL, and the web page is sent to the UE.

The data communication service network is a mobile data network or a WLAN.

The intelligent DNS is further configured to, after receiving the DNS query request carrying the domain name of the website to be visited from the UE, if it is found that the domain name is a domain name that does not require content adaptation, query the DNS of the Internet for the domain name corresponding to the domain name. The IP address of the data service server returns a service redirection message carrying the IP address to the UE. After receiving the service redirection message, the UE directly sends a service request to the data service server.

The adaptation server is further configured to, after receiving the service request carrying the URL of the website to be visited from the UE, if it is found that the content of the webpage to be visited by the user does not need to be adapted, then query the DNS of the Internet for the domain name of the URL The corresponding IP address of the data service server returns a service redirection message carrying the IP address to the UE.

The adaptation server is further configured to, when receiving a service request from the UE, if it is found that the request carries a destination website URL parameter, then parse the parameter to obtain the URL of the website to be visited by the user, and query the DNS of the Internet for the website to be visited The IP address of the data service server corresponding to the domain name of the website URL, initiates a service request to the IP address, and when receiving the webpage content returned by the data service server, performs content adaptation on the webpage content and returns it to the UE.

When the data communication service network is a mobile data network, the network elements supporting the terminal's Internet access are: a radio network controller RNC, a serving GPRS support node SGSN, and a gateway GPRS support node GGSN;

When the data communication service network is a WLAN, the network elements supporting the terminal's Internet access include: an access controller AC and an access point AP.

An intelligent DNS located in the data communication service network, including:

Domain name storage module: save the domain name that needs content adaptation;

A record module: record the IP address of the adaptation server corresponding to the domain name that needs content adaptation;

DNS query processing module: receives the DNS query request from the UE that carries the domain name of the website to be visited, if it finds that the domain name is in the domain name storage module, then searches the A record module for the IP address of the adaptation server corresponding to the domain name, and sends the request to the UE The IP address of the adaptation server is returned, so that the UE initiates a service request carrying the URL of the website to be visited to the adaptation server, and the service is a service based on TCP and using a text control protocol.

The DNS query processing module is further configured to, when it is found that the domain name carried by the DNS query request is not in the domain name storage module, query the DNS of the Internet for the IP address of the data service server corresponding to the domain name, and return the IP address carrying the IP address to the UE. business redirect message.

An adaptation server, comprising:

Content adaptation strategy storage module: store content adaptation strategy;

Content adaptation module: Receive the service request sent by UE, if it is found that the request does not carry the URL parameter of the destination website, and according to the content adaptation strategy in the content adaptation strategy storage module, it is found that the content of the webpage to be accessed by the user needs to be adapted , then send a service request to the data service server, and adapt the content of the webpage returned by the data service server. The parameter of the URL, and the URL of the adaptation server is concatenated with the URL parameter to obtain the modified URL, and the web page is sent to the UE. The service is a service based on TCP and using a text-type control protocol.

The content adaptation module is further used to, if it is found that the received service request carries a destination website URL parameter, then resolve the URL to be accessed from the parameter, and query the DNS of the Internet for the domain name corresponding to the URL to be accessed. IP address, initiate a service request to the IP address, and when receiving the webpage content returned by the data service server, perform content adaptation on the webpage content and return it to the UE.

The content adaptation module is further configured to, when it is found that there is no need to adapt the content of the webpage to be accessed by the user according to the content adaptation strategy in the content adaptation strategy storage module, then query the DNS of the Internet for the domain name corresponding to the URL. The IP address of the data service server, and returns a service redirection message carrying the IP address to the UE.

Compared with the prior art, in the present invention, when the UE initiates an access request for a webpage of a website for the first time, the adaptation server, for each URL link embedded on the webpage that requires content adaptation, uses the URL as The form of the URL parameter is concatenated with the URL of the adaptation server, and the URL link on the webpage is replaced with the URL obtained after concatenation. In this way, afterward, when the UE accesses the URLs embedded in the webpage that need content adaptation , you can directly initiate a service request to the adaptation server, which reduces the network delay and network element overhead, thereby reducing service deployment and operating costs; it also reduces the data flow and cost of the user's Internet access, and stimulates the user's enthusiasm. The enthusiasm for surfing the Internet has stimulated the development of mobile Internet business.

Description of drawings

Fig. 1 is the schematic diagram of existing content adaptation mechanism based on WAP gateway agent;

FIG. 2 is a schematic diagram of an existing content processing mechanism based on deep packet detection;

FIG. 3 is a schematic message flow diagram of a content adaptation method provided by an embodiment of the present invention;

FIG. 4 is a schematic composition diagram of a content adaptation system provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of the composition of an intelligent DNS provided by an embodiment of the present invention;

Fig. 6 is a schematic diagram of the composition of the adaptation server provided by the embodiment of the present invention.

detailed description

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 3 is a schematic message flow diagram of the content adaptation method provided by the embodiment of the present invention, as shown in Fig. 3, the specific steps are as follows:

Step 300: Add a smart domain name system (DNS, DomainName System) to the data communication service network, configure a domain name database on the smart DNS to store domain names that need content adaptation, and configure an A record on the smart DNS to record The IP address of the adaptation server corresponding to each domain name that needs content adaptation.

The data communication service network may be: a mobile data network such as: GPRS network, WLAN, etc.

The difference between Smart DNS and traditional Internet DNS is that the A record on Smart DNS is only used by Internet terminals and does not support DNS queries from the Internet; in addition, for DNS queries sent by Internet terminal users, if Smart DNS fails to find The corresponding IP address, the smart DNS supports recursively initiating DNS queries to the DNS of the Internet.

Step 301: The user equipment (UE, UserEquipment) sends a PDP context activation request message to the network side based on its own data connection settings.

Here, the data connection setting refers to the setting of accessing the data communication service network, such as: the setting of accessing the mobile data network, that is, the setting of WAPAPN, the setting of accessing the WLAN, and the like.

Step 302: The terminal network support network element receives the PDP context activation request message, establishes a data connection for the UE, and returns a PDP context activation response message to the UE, and the response message carries the IP address allocated for the UE, the IP address of the smart DNS IP address, so far the UE has the conditions to access the data service server.

For the mobile data network, the network elements supported by the terminal to access the Internet are: radio network controller (RNC, RadioNetworkController), serving GPRS support node (SGSN, ServingGPRSSupportNode), gateway GPRS support node (GGSN, GatewayGPRSSupportNode), etc.; for WLAN, The network elements supported by the terminal to access the Internet are: access controller (AC, AccessController), access point (AP, AccessPort), etc.

Step 303: the user inputs the URL of the website to be visited in the browser of the UE.

Step 304: UE acquires the domain name of the website to be visited, that is, the domain name of the data service server according to the URL input by the user, and sends a DNS query request message to the smart DNS, the message carrying the domain name of the website to be visited.

Step 305: The smart DNS receives the DNS query request message, judges whether the domain name of the website to be accessed is a domain name requiring content adaptation according to its own domain name database, and if so, executes step 307; otherwise, executes step 306.

If a domain name is in the database, it means that the domain name needs content adaptation; otherwise, it means that the domain name does not need content adaptation.

Step 306: The smart DNS sends a domain name recursive query request message to the DNS of the Internet, the message carries the domain name of the website to be visited, so as to obtain the IP address of the data service server, and the process ends.

If the smart DNS has obtained the IP address of the data service server corresponding to the domain name of the website to be visited from the DNS of the Internet before, the smart DNS will keep the corresponding relationship between the domain name and the IP address of the data service server in the cache. Therefore, in this step, the smart DNS can first query the domain name of the website to be visited in the cache, and if found, can directly obtain the IP address of the data service server; otherwise, initiate a domain name recursive query request message to the Internet DNS.

In this step, when the smart DNS obtains the IP address of the data service server, it returns an HTTP redirection message carrying the IP address to the UE, so that the UE can directly send an HTTP request message to the data service server to obtain the IP address of the data service server without content adaptation. matching webpage.

Step 307: The smart DNS returns a DNS query response message carrying the domain name resolution result, that is, the IP address of the adaptation server, to the UE according to the A record configured by itself.

Step 308: The UE receives the DNS query response message, uses the IP address of the adaptation server in the message as the destination IP address of the HTTP request message, and fills in the domain name of the data service server in the host field of the URL in the message , to send the HTTP request message.

The URL in the HTTP request message is the URL of the website to be visited input by the user in step 303 .

Step 309: The adaptation server receives the HTTP request message, and judges whether the content of the web page to be accessed by the user needs to be adapted according to the content adaptation whitelist configured by itself, and if so, executes step 311; otherwise, executes step 310.

The adaptation server maintains a content adaptation whitelist, which includes UA values, website domain names, website URLs, etc. that require content adaptation.

Step 310: The adaptation server queries the DNS of the Internet for the IP address corresponding to the host part of the URL, and initiates an HTTP redirection message carrying the IP address to the UE. After receiving the redirection message, the UE directly initiates an HTTP redirection message to the IP address. request message to obtain webpage content without content adaptation, and this process ends.

The IP address corresponding to the host part of the HTTP request message is the IP address of the data service server.

Step 311: The adaptation server queries the DNS of the Internet for the IP address corresponding to the host part of the URL, and acts as a proxy server to initiate an HTTP request message to the IP address. The URL of the message is the website to be visited entered by the user in step 303 URL.

Step 312: The data service server receives the HTTP request message, obtains the web page content according to the URL in the message, and forwards the web page content in the HTTP response message to the adaptation server.

Step 313: The adaptation server receives the HTTP response message, performs a content adaptation operation on the webpage in the message according to the content adaptation strategy configured by itself, and adapts the whitelist according to the content configured by itself, and determines the Embedded URLs that require content adaptation, modify each URL that requires content adaptation as follows: use the URL that requires content adaptation as the URL parameter of the target website, and use the URL of the adaptation server with the target website The website URL parameters are concatenated to obtain the modified URL.

When the URL of the adaptation server is concatenated with the URL parameter of the destination website, the characters in the URL parameter can be encoded if necessary.

The following example illustrates how to concatenate the URL of the adaptation server with the URL parameters of the destination website:

Assume that the webpage returned by the data service server contains a URL that requires content adaptation: http://disney.monternet.com/page1.html , and the domain name of the adaptation server is http://go.10086.cn/adapt , IP address is 112.4.12.7, then the URL obtained after concatenation is:

http://go.10086.cn/adapt?

dst=http:%2F%2Fdisney.monternet.com%2Fpage1.html

or

http://112.4.12.7/adapt?

dst=http:%2F%2Fdisney.monternet.com%2Fpage1.html. Among them, "?" is used to indicate that the destination website URL parameter that needs content adaptation is followed, dst indicates the destination website URL parameter name, and "=" is followed by the destination website URL that needs content adaptation. Cannot contain "/" in , so "/" is encoded as "%2F".

The local content adaptation strategy of the adaptation server includes but is not limited to:

1. Determine whether to adapt content requested by the UE based on a User Agent (UA, UserAgent) parameter of the UE. For example, when the UA is a mobile terminal, the content of the requested webpage is adapted; when the UE is a PAD or a network card, the content of the requested webpage is not adapted, and so on.

2. Determine whether to adapt the content requested by the UE based on the domain name and URL of the website accessed by the UE. For example: content adaptation is not performed for Monternet's entire network (*.monternet.com), content adaptation is performed for Xinhuanet's international channel ( http://www.xhnet.com/world/ ), and financial channel ( http://www.xhnet.com/fortune/ ) does not perform content adaptation, etc.

Step 314: the adaptation server sends the adapted webpage content to the UE.

Step 315: the user browses the adapted webpage content, and when the user clicks a URL link embedded in the webpage, the UE sends an HTTP request message containing the URL, and the message reaches the adaptation server.

Step 316: The adaptation server receives the HTTP request message, parses out the URL parameter of the destination website from the URL of the message, obtains the URL of the website to be visited by the user, and queries the DNS of the Internet for the correspondence of the host part of the URL of the website to be visited The IP address of , as a proxy server, sends HTTP request packets to this IP address.

For example: when the URL in the HTTP request message received by the adaptation server is: http://go.10086.cn/adapt? When dst=http:%2F%2Fdisney.monternet.com%2Fpage1.html, the adaptation server parses out that the URL of the website to be accessed by the user is http://disney.monternet.com/page1.html .

Step 317: The data service server receives the HTTP request message, obtains the web page content corresponding to the URL in the message, and forwards the web page content to the adaptation server in the HTTP response message.

Step 318: The adaptation server receives the HTTP response message, performs a content adaptation operation on the webpage content in the message, and returns the adapted webpage content to the UE.

Figure 4 is a schematic diagram of the composition of the content adaptation system provided by the embodiment of the present invention, as shown in Figure 4, it mainly includes: UE41, terminal Internet access support network element 42, intelligent DNS43, adaptation server 44 and data service server 45, wherein :

UE41: Based on its own data connection settings, send a PDP context activation request message to the terminal Internet access support network element 42 on the network side, and receive a PDP context activation response message returned by the terminal Internet access support network element 42. The response message carries the UE allocated IP address and the IP address of intelligent DNS; When detecting that the user enters the URL of the website to be visited, obtain the domain name of the website to be visited, that is, the domain name of the data service server, and initiate a DNS query request message carrying the domain name of the website to be visited to the intelligent DNS43, Receive the DNS query response message carrying the IP address of the adaptation server returned by the intelligent DNS43, use the IP address of the adaptation server in the message as the destination IP address of the service request message, and add it in the host field of the URL in the message Fill in the domain name of the data service server, send the service request message; receive the webpage through content adaptation sent by the adaptation server 44, when detecting that the user has clicked the URL link on the webpage, send the service request carrying the URL message.

Terminal Internet access support network element 42: receives the PDP context activation request message sent by UE41, and returns a PDP context activation response message to the UE, the response message carrying the IP address allocated for the UE and the IP address of the smart DNS.

Smart DNS43: save the domain name that needs content adaptation, and record the IP address of the adaptation server corresponding to the domain name; receive the DNS query request message carrying the domain name of the website to be visited sent by UE41, if the domain name is found to be content adaptation If the domain name is adapted, then return a DNS query response message carrying the IP address of the adaptation server to UE41.

The intelligent DNS43 is further used for, after receiving the DNS query request message carrying the domain name of the website to be visited sent by the UE41, if it is found that the domain name is a domain name that does not need content adaptation, then query the DNS of the Internet for the data corresponding to the domain name The IP address of the service server returns a service redirection message carrying the IP address to UE41, so that UE41 can directly send a service request message to data service server 45 after receiving the service redirection message.

Adaptation server 44: When receiving the service request message sent by UE41, if it is found that the URL parameter of the destination website is not carried in the request message, and it is found that the content of the webpage to be accessed by the user needs to be adapted, then the data service server 45 Send a service request message, and carry out content adaptation to the webpage returned by the data service server 45, and at the same time, modify each URL link embedded in the webpage that needs to carry out content adaptation to: use this URL as the purpose of the modified URL Website URL parameter, and the URL of this adaptation server is connected in series with this parameter to obtain the modified URL, and the webpage is sent to UE41; when receiving the service request message sent by UE41, if the request message is found Carry destination website URL parameter, then analyze this parameter, obtain the URL of the website to be visited by the user, query the IP address of the data service server 45 corresponding to the domain name of the URL of the website to be visited to the DNS of the Internet, initiate the carrying to be visited to this IP address The service request message of the URL of the website, when receiving the webpage content returned by the data service server 45, performs content adaptation on the webpage content and returns it to the UE41.

The adaptation server 44 is further configured to, after receiving the service request message carrying the URL of the website to be visited from the UE41, if it is found that it is not necessary to adapt the content of the webpage to be visited by the user, then query the DNS of the Internet for the URL of the URL. The IP address of the data service server 45 corresponding to the domain name returns a service redirection message carrying the IP address to the UE41.

Data service server 45: receives the service request message sent by the adaptation server 44, obtains the corresponding webpage content according to the URL in the message, and returns the webpage content to the adaptation server 44.

Figure 5 is a schematic diagram of the composition of the intelligent DNS provided by the embodiment of the present invention, as shown in Figure 5, it mainly includes: a domain name storage module 431, an A record module 432 and a DNS query processing module 433, wherein:

Domain name storage module 431: storing domain names that need content adaptation.

A record module 432: record the IP address of the adaptation server corresponding to the domain name that needs content adaptation.

DNS query processing module 433: receive the DNS query request message carrying the domain name of the website to be visited sent by UE41, if the domain name is found in the domain name storage module 431, then search the IP of the adaptation server corresponding to the domain name in the A record module 432 The address returns the IP address of the adaptation server to the UE41, so that the UE41 initiates a service request carrying the URL of the website to be visited to the adaptation server 44.

The DNS query processing module 433 is further used to, when it is found that the domain name carried by the DNS query request message is not in the domain name storage module 431, query the DNS of the Internet for the IP address of the data service server corresponding to the domain name, and return the IP address carrying the IP address to the UE41. Business redirect message.

FIG. 6 is a schematic diagram of the composition of the adaptation server provided by the embodiment of the present invention. As shown in FIG. 6, it mainly includes: a content adaptation policy storage module 441 and a content adaptation module 442, wherein:

Content adaptation policy storage module 441: store content adaptation policies.

Content adaptation module 442: receives the service request message sent by UE41, if it is found that the service request message does not carry the URL parameter of the destination website, and according to the content adaptation strategy in the content adaptation strategy storage module 441, it is found that the user needs to To adapt the content of the webpage to be accessed, then query the IP address of the domain name corresponding to the URL to be visited to the DNS of the Internet to the IP address of the data service server 45, send a service request message to the data service server 45, and perform content processing on the webpage returned by the data service server 45 Adaptation, at the same time, modify each URL link that needs to be adapted on the webpage to: use this URL as the parameter of the URL after modification, and connect the URL of this adaptation server 44 with the URL parameter , obtain the modified URL, and send the webpage to UE41; if it is found that the service request message carries the URL parameter of the destination website, the URL to be accessed is parsed from the parameter, and the domain name corresponding to the URL to be accessed is queried from the DNS of the Internet. The IP address of the data service server 45, initiate a service request to this IP address, and when receiving the webpage content returned by the data service server 45, perform content adaptation on the webpage content and return it to the UE41.

The content adaptation module 442 is further used for, when, according to the content adaptation policy in the content adaptation policy storage module 441, it is found that it is not necessary to adapt the content of the webpage to be accessed by the user, then query the DNS of the Internet for the domain name corresponding to the URL. The IP address of the data service server 45 returns a service redirection message carrying the IP address to the UE41.

It should be noted that, in practical applications, the webpage content adaptation processing in the embodiments shown in FIGS. Advertisement insertion, prompt page pop-up, etc., information filtering such as: scanning malicious script code, preventing the spread of virus content, etc. At this point, the adaptation server in the embodiments shown in FIGS. 3-6 needs to be expanded into a content processing server. In addition, the present invention is not only applicable to the content adaptation of the HTTP service, but also applicable to the content adaptation of other services based on the transmission control protocol (TCP, Transmission Control Protocol) and using a text-based control protocol, such as: real-time streaming protocol (RTSP, RealTimeStreamingProtocol) business. When it is applied to the content adaptation of RTSP services, it is only necessary to replace the "HTTP request message" appearing in the embodiment shown in Figure 3 with the "RTSP request message" at this time, and the "HTTP response message" is replaced with "RTSP response message", and the "HTTP redirection message" appearing in the embodiment shown in FIG. 3 is replaced with "RTSP redirection message".

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (19)

1. a content adaptation method, is characterized in that, in data communication service network, increase intelligent domain name system DNS, and intelligent DNS preserves the domain name need carrying out content adaptation, and record the IP address of adaptation services device corresponding to domain name, the method comprises simultaneously:

Terminal online is supported to return to the IP address of intelligent DNS to UE by the packet data protocol PDP context activation request message that network element reception user equipment (UE) is sent; The uniform resource position mark URL of the website to be visited that UE inputs according to user, the DNS query request of carrying website to be visited domain name is initiated to intelligent DNS, intelligent DNS finds that this website to be visited domain name is the domain name need carrying out content adaptation, then return to the IP address of adaptation services device to UE, UE initiates the service request of carrying described URL to adaptation services device;

Adaptation services device receives described service request, need to carry out adaptation to user's web page contents to be visited if find, then send service request to data service server, and content adaptation is carried out to the webpage that data service server returns, simultaneously, each URL link of the need that this webpage embeds being carried out content adaptation is revised as: the need embedded on this webpage carry out the object website URL parameter of URL as amended URL of content adaptation, and the URL of adaptation services device is connected in series with this object website URL parameter, obtain amended URL, webpage after content adaptation is sent to UE,

Described business is business that carry based on transmission control protocol TCP, that use text-type control protocol.

2. method according to claim 1, is characterized in that, described data communication service network is mobile data network or WLAN (wireless local area network) WLAN.

3. method according to claim 1, is characterized in that, described UE comprises further after intelligent DNS initiates to carry the DNS query request of website to be visited domain name:

If intelligent DNS finds that this website to be visited domain name is the domain name not needing to carry out content adaptation, then to the IP address of data service server corresponding to this website to be visited domain name of DNS query of internet, the business redirect message of the IP address of carrying this data service server is returned to UE, after UE receives this business redirect message, send service request directly to data service server.

4. method according to claim 1, is characterized in that, described UE comprises further after adaptation services device initiates to carry the service request of described URL:

Adaptation services device is according to the content adaptation white list self configured, find not need to carry out adaptation to user's web page contents to be visited, then to the IP address of data service server corresponding to the domain name of the URL of this website to be visited of DNS query of internet, the business redirect message of the IP address of carrying this data service server is returned to UE, after UE receives this business redirect message, send service request directly to data service server.

5. method according to claim 1, is characterized in that, described adaptation services device comprises after the webpage after content adaptation is sent to UE further:

When UE detects that user clicks the URL link of the content that this webpage after content adaptation embeds, UE sends the service request comprising the URL that this user clicks, this request arrives adaptation services device, adaptation services device parses object website URL parameter from the URL of this request, obtain the URL of user website to be visited, to the IP address of data service server corresponding to the domain name of the URL of this website to be visited of DNS query of internet, to the IP address initiating business request of data service server corresponding to the domain name of the URL of this website to be visited, data service server receives this service request, obtain the web page contents that URL in this request is corresponding, web page contents is transmitted to adaptation services device, adaptation services device returns to UE after carrying out content adaptation to this web page contents.

6. method according to claim 1, is characterized in that,

When described data communication service network is mobile data network, described terminal online supports that network element is: radio network controller (RNC), Serving GPRS Support Node SGSN, Gateway GPRS Support Node GGSN;

When described data communication service network is WLAN, described terminal online supports that network element is: access controller AC, access point AP.

7. method according to claim 1, is characterized in that, described adaptation services device finds that needing to carry out adaptation to user's web page contents to be visited comprises:

Adaptation services device determines whether to carry out adaptation to user's web page contents to be visited based on the user agent UA parameter of UE;

Or adaptation services device determines whether to carry out adaptation to user's web page contents to be visited based on the domain name of user website to be visited;

Or adaptation services device determines whether to carry out adaptation to user's web page contents to be visited based on the URL of user website to be visited.

8. method according to claim 1, is characterized in that, described business that carry based on TCP, use text-type control protocol is: HTML (Hypertext Markup Language) HTTP business, or real-time streaming protocol RTSP business.

9. a content adaptation system, is characterized in that, comprising:

Network element is supported in terminal online: receive the PDP context activation request message that UE sends, return to the IP address of intelligent DNS to UE;

Intelligent DNS: preserve the domain name need carrying out content adaptation, records the IP address of adaptation services device corresponding to domain name simultaneously; Receive the DNS query request of carrying website to be visited domain name that UE sends, if find, this website to be visited domain name is the domain name need carrying out content adaptation, the IP address of adaptation services device is then returned to UE, to make UE carry the service request of the URL of website to be visited to the initiation of adaptation services device, described business is business that carry based on TCP, that use text-type control protocol;

Adaptation services device: receive the service request that UE sends, when not carrying object website URL parameter in this request of discovery, and find to need to carry out adaptation to user's web page contents to be visited, then send service request to data service server, and content adaptation is carried out to the webpage that data service server returns, simultaneously, each URL link of the need that this webpage embeds being carried out content adaptation is revised as: the need embedded on this webpage carry out the object website URL parameter of URL as amended URL of content adaptation, and the URL of adaptation services device is connected in series with this object website URL parameter, obtain amended URL, webpage after content adaptation is sent to UE.

10. system according to claim 9, is characterized in that, described data communication service network is mobile data network or WLAN.

11. systems according to claim 9, it is characterized in that, described intelligent DNS is further used for, when receive that UE sends carry the DNS query request of website to be visited domain name after, if find, this website to be visited domain name is the domain name not needing to carry out content adaptation, then to the IP address of data service server corresponding to this website to be visited domain name of DNS query of internet, the business redirect message of the IP address of carrying this data service server is returned to UE, after UE receives this business redirect message, send service request directly to data service server.

12. systems according to claim 9, it is characterized in that, described adaptation services device is further used for, when receive that UE sends carry the service request of website URL to be visited after, do not need to carry out adaptation to user's web page contents to be visited if find, then to the IP address of data service server corresponding to the domain name of the URL of this website to be visited of DNS query of internet, return the business redirect message of the IP address of carrying this data service server to UE.

13. systems according to claim 9, it is characterized in that, described adaptation services device is further used for, when the service request receiving UE and send, if find, object website URL parameter is carried in this request, then resolve this object website URL parameter, obtain the URL of user website to be visited, to the IP address of data service server corresponding to the domain name of the URL of this website to be visited of DNS query of internet, to the IP address initiating business request of this data service server, when the web page contents receiving data service server and return, UE is returned to after content adaptation is carried out to this web page contents.

14. systems according to claim 9, is characterized in that,

When described data communication service network is mobile data network, described terminal online supports that network element is: radio network controller (RNC), Serving GPRS Support Node SGSN, Gateway GPRS Support Node GGSN;

When described data communication service network is WLAN, described terminal online supports that network element is: access controller AC, access point AP.

15. 1 kinds of intelligent DNS, is characterized in that, are arranged in data communication service network, comprise:

Domain name memory module: preserve the domain name need carrying out content adaptation;

A logging modle: record need carry out the IP address of adaptation services device corresponding to the domain name of content adaptation;

DNS query processing module: receive the DNS query request of carrying website to be visited domain name that UE sends, if find, this website to be visited domain name is in domain name memory module, in A logging modle, then search the IP address of adaptation services device corresponding to this website to be visited domain name, the IP address of this adaptation services device is returned to UE, to make UE carry the service request of the URL of website to be visited to the initiation of adaptation services device, described business is business that carry based on TCP, that use text-type control protocol.

16. intelligent DNS according to claim 15, it is characterized in that, described DNS query processing module is further used for, when the domain name that the described DNS query request of discovery is carried is not in domain name memory module, the IP address of the data service server that the domain name of carrying to this DNS query request of DNS query of internet is corresponding, returns the business redirect message of the IP address of carrying this data service server to UE.

17. 1 kinds of adaptation services devices, is characterized in that, comprising:

Content adaptation policy store module: store content adaptation strategy;

Content adaptation module: receive the service request that UE sends, if find, object website URL parameter is not carried in this request, and according to the content adaptation strategy in content adaptation policy store module, discovery needs to carry out adaptation to user's web page contents to be visited, then send service request to data service server, and content adaptation is carried out to the webpage that data service server returns, simultaneously, each URL link of the need that this webpage embeds being carried out content adaptation is revised as: the object website URL parameter using this URL as amended URL, and the URL of adaptation services device is connected in series with this object website URL parameter, obtain amended URL, webpage after content adaptation is sent to UE, described business is carry based on TCP, use the business of text-type control protocol.

18. adaptation services devices according to claim 17, it is characterized in that, described content adaptation module is further used for, if find, the service request received carries object website URL parameter, then from this object website URL parameter, parse URL to be visited, to the IP address of data service server corresponding to the domain name of this URL to be visited of DNS query of internet, to the IP address initiating business request of this data service server, when receiving the web page contents that data service server returns, after content adaptation is carried out to this web page contents, return to UE.

19. adaptation services devices according to claim 17, it is characterized in that, described content adaptation module is further used for, when according to the content adaptation strategy in content adaptation policy store module, find not need to carry out adaptation to user's web page contents to be visited, then to the IP address of data service server corresponding to the domain name of the URL of the DNS query user website to be visited of internet, return the business redirect message of the IP address of carrying this data service server to UE.