A Service Identification Method In Mobile Internet

As mobile internet business is booming, the types of service are continuously enriched, Mobile network operation companies have to support the variety of IP services offered by themselves a variety of ip, and have to provide hosting features to the varieties IP services which is used by the users freely as well.This paper introduces the Deep Packet Inspection technology first,then explains the advantages and drawbacks of DPI technology. Introduce the typical service identification method, including the detection technology based on the characteristics, the identify technology of application gateways, and the identify technology of activity mode. The detection technology based on the characteristics is to do mode maching through the characteristic information of the network dateflow load part, then identify the detection of the network dataflow. The identify technology of application gateways identify the controlling flow of the network service first, then ranalyses the related information of service flow based on the agreement content of the control flow, at last analyses the service flow to identify the service flow.The identify technology of activity mode is used to the services that can not been judged according to the protocol. The three types of identification technology are used to different types of protocols, also can not be substituded of each other. The three technologies have to be used generally if we want to identify different services of network efficiently and accurately.This paper mainly analyses the network features and service features of the mobile internet which is supported by the CMNET. Study the service identification methods of major businesses,including Fetion, Multimedia Message, WAP browsing, mobile QQ,and BitTorrent download. Analyze the protocol analysis methods of them, Propose service identification methods applicable to the services above. Propose two effective means of service identification. They are the analysis means of associated flow and the matching means of drilling in the character string. Deeply study the characteristics of the typical services. Achieve the service identification of Fetion, Multimedia Message,WAP browsing, mobile QQ. As well as the service identification of BitTorrent download service which is representative of P2P business.T The basic thought of associated flows is based on the flow to finish the service identification, which applies to TCP services. Classify the data packet according to the quintuple information,every class should be a data flow which called associated flow. If you could identify any data service of service pocket from an associated flow accurately, then flow identification is finished.The matching means of drilling in the character string idea is that the entire IP packet data field and made several fixed locations and features string smatching recognition. It is a identification method fixed position for a fixed feature in the protocol used in astring literal search which is different from recognition.This paper presents efficient identification and associated flow characteristics of punch-type matching acombination ofidentification methods. That is,first according to the TCP packet classification associated with the use of punch-typecharacteristics, or by-bit string matching algorithms to find a way to match the operational characteristics of the data packet, and then classify all the data packets associated into one class of business.The two means of service identification can be of high efficiency, accurate and easy to achieve.Based on the means of service identification and algorithms, compile a service identification software, it is DPI software.Using the software can identify data packages in depth in the mobile internet business.The identify results show that the analysis means of associated flow and the matching means of drilling in the character string are simple,efficient and of high accuracy in identification.