The Application Of TCP Unilateral Acceleration In Audio And Video Transmissions

IP camera(IP CAMERA,hereinafter referred to as IPC)video surveillance is now widely used in chain-type companies to supervise and manage their operating stores.The company requires operating stores to transmit IPC monitoring data to the headquarters in real time to achieve control purposes.However,the traditional TCP protocol lags behind congestion determination and packet loss determination mechanisms in the increasingly complex network environment.Link congestion judgment and packet loss judgment,untimely judgment and misjudgment often occur,leading to increased congestion and a large number of packet losses.This situation seriously affects the transmission efficiency of the link and causes a waste of bandwidth resources.The TCP unilateral acceleration technology has more accurate congestion judgment and packet loss judgment mechanism,which can timely sense the abnormality of the link and effectively avoid the occurrence of a large number of packet loss and increased congestion on the link.Not only that,TCP unilateral acceleration technology can also detect the actual available bandwidth of the link,control the transmission rate through a sliding window,and improve the utilization rate of the link bandwidth.In addition,TCP unilateral acceleration technology reuses the original TCP protocol stack,and always keeps the network topology fully transparent,which can perfectly replace the traditional TCP protocol work and make up for its deficiencies.The traditional deployment of TCP single side acceleration technology is deployed on the server side,so as to achieve the response speed of multiple complex client access.In this thesis,the TCP acceleration technology based on the learning based engine is deployed in the client and the resources of the acceleration program integration system are less in the gateway.The automatic learning state machine can judge the link abnormality in time and adjust it,so as to accelerate the transmission of audio and video data.The content of this thesis mainly has the following four points:(1)Analyzes the shortcomings of the existing TCP protocol in the audio and video data transmission,obtains the research objectives of this thesis,and emphasizes the necessity of TCP unilateral acceleration technology in the audio and video data transmission(2)Introduces the existing TCP acceleration technologies in the Internet,and expounds their acceleration principles,advantages and disadvantages in detail.(3)According to the difficulties encountered in the audio and video data transmission of chain operation companies,this thesis analyzes the requirements of TCP acceleration technology and designs the system framework.Then configure the embedded module of the bottom layer of the webcam and the acceleration program gateway,and implement the calling module.(4)Take lucking coffee company as an example to test the TCP acceleration program,record the data and analyze the results.