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Hierarchical recognition method of VoIP (Voice Over Internet Protocol) network flow

A network traffic and identification method technology, applied in the field of identifying specific VoIP application types based on network traffic, can solve problems such as low efficiency and accuracy, and inability to identify VoIP application types at a deeper level, achieving low system overhead, saving time and system. cost, and the effect of improving recognition efficiency

Inactive Publication Date: 2013-01-30
XI AN JIAOTONG UNIV
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem of low efficiency and accuracy in the existing VoIP network traffic identification technology and the inability to identify the specific VoIP application type in a deeper level, and to provide a new hierarchical VoIP network traffic identification method

Method used

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  • Hierarchical recognition method of VoIP (Voice Over Internet Protocol) network flow
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  • Hierarchical recognition method of VoIP (Voice Over Internet Protocol) network flow

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Embodiment Construction

[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0040] refer to figure 1 , the data packet acquisition module is used to obtain the monitored network data packets, and store the transport layer characteristics of the data packets in the corresponding bidirectional network flow records in the bidirectional network flow table according to the definition of bidirectional network flow in this paper.

[0041] The bidirectional network flow table is used to record the source IP, destination IP, protocol type (TCP / UDP), VoIP application type and its transport layer statistical feature sequence.

[0042] The timing update module is used to regularly update the two-way network flow table, and output the two-way network flow with no data packets entering or leaving within the specified time threshold T according to the format of source IP, destination IP, protocol type (TCP / UDP) and VoIP application type to a text ...

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Abstract

The invention discloses a hierarchical recognition method of a VoIP (Voice Over Internet Protocol) network flow. The method comprises the following steps of: firstly, matching with a special IP and a port template library, if the special IP and a port exist, realizing rapid recognition; if no special IP and port exist, collecting a transport layer characteristic sequence, rapidly marking a remarkable non-VoIP application according to a data message length threshold in a collection process; and after data packets with appointed quantity are collected, correspondingly processing the characteristic sequences of a bidirectional network flow and sequentially matching with standards in a VoIP statistical characteristic template library, and marking application types, wherein a Renyi information entropy used in a matching process is used as one of the standards. By using the characteristic information of a plurality of data packets of the network flow, the method can realize the effect of quick and efficient recognition in the initial period of establishing a VoIP network flow. Meanwhile, because the characteristic information of a transport layer is only used, message-by-message detection is not needed, a complex computing process is not needed, and the hierarchical recognition method is efficient and simple, is little in system overhead, and can be applied online in real time.

Description

technical field [0001] The invention relates to the technical field of the Internet, in particular to a method for identifying specific VoIP application types according to network traffic. Background technique [0002] VoIP (Voice over Internet Protocol) is a technology that focuses on IP telephony and introduces corresponding value-added services. VoIP network telephony is to compress and packetize the analog voice signal, and then transmit the voice signal on the IP network in the form of data packets. Generally speaking, it is Internet telephony or IP telephony. The biggest advantage of VoIP is that it can widely use the Internet and the global IP interconnection environment, and provide more and better services than traditional services. It allows you to transmit voice and fax on the IP network for free or at a very low cost through the Internet. , video, and data services, such as unified messaging, virtual telephone, virtual voice / fax mailbox, directory service, Inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/801H04M7/00
Inventor 秦涛杨柳静管晓宏李卫
Owner XI AN JIAOTONG UNIV
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