Research Of Remote Transmitter Monitoring And Its Wireless Communication Reliability

With the development of the intelligent and digital level,broadcast transmitters become more and more important because of information transmission.But Chinese transmitter monitoring system has many limitations.Monitoring equipment is slow and monitoring environment is poor.The traditional fieldbus control has been unable to adapt to the development trend of the period.Because computer technology and Android mobile terminal are very popular,researching and designing based on the mobile terminal remote monitoring system has great practical significance.In data transmission,the paper aims at the problem which are security and real-time feature,the encryption technology is applied to data transmission.By analyzing the shortcomings of the traditional AES algorithm,the chaotic key is used to replace the key of the traditional algorithm,and the row shift and the column merge merge into row and column transformation,so improving the randomness of keys and the efficiency of algorithm,thus in data transmission,the security and the real-time feature are improved.In video stream transmission,aiming at the stability,the congestion control algorithm is applied to video transmission.By analyzing the defects of traditional FCAalgorithm and improved FCA algorithm,the video capture server divides the network into three states according to the packet loss rate,and adjusts the transmission rate according to the state of the network,thus In video stream transmission,the stability of the video transmission is improved.In order to verify effectiveness of the algorithm,and for Chinese lagging transmitter monitoring system,this paper designs a remote monitoring system based on Android mobile terminal test program.On the basis of realizing the basic monitoring function,the improved encryption algorithm and the improved congestion control algorithm are designed.The system mainly consists of four parts: front control unit,data transfer server,video capture server and Android client.The system designed in this paper can monitor the working condition data and video.The Android client can send commands to the specified transmitter through the data’s transferring server and can receive real-time operating parameters of the transmitter,and can also establish the network session connection with the video serverin orderto real-time monitor the transmitterroom.Finally,building experimental environment,and using software testing methods carry out the function test and performance test of the remote monitoring system based on mobile terminal.The test results show that the improved AES algorithm improves the randomness of the keys and reduces the time complexity,the improved congestion control algorithm reduces the packet loss rate and the jitter amplitude of the RTPpacket,thus wireless communication performance is improved.