The Research And Realization Of IP Multicast Technique On The Video Monitoring System Of The Expressway

Video Monitoring System is an advanced use of modern computer technology, Stable high-speed communication technologies and ease of transmission of digital video technology in one integrated system. Since the beginning, as have its intuitive, convenient, content-rich information and can reproduce after emergencies, etc. was widely used in many occasions. In the field of monitoring technology, towarding digital, network, and intelligent direction of the highway video monitoring system monitoring as an important component of control system plays an important role in traffic management systems. Highway network video monitoring technology is the comprehensive use of the technology of digital image coding, IP network communications, industrial control and so on.IP Multicast data transmission network is IP unicast, multicast and broadcast in one of three ways, is a network technology that permits one or more of the sender (multicast source) sending a single packet to multiple recipients.Multicast source to send packets to a specific multicast group, and only belong to the multicast group address to receive packets. Multicast can greatly save the network bandwidth, because no matter how many goals address, at the entire network , any of the links has only a single packet transmission. Currently, IP multicast can run in any structure on the network, including the Internet, ATM, Frame Relay, SMDS and satellite, covering many areas of the network can be used in video and tele-conferencing, multi-media type, press releases and those to Since the space of a remote live broadcast.This paper first introduces the development of China's highway system and its monitoring of the situation, put forward the IP multicast technology in Video Monitoring System highway purpose and significance. Pointed out that the highway towards the video monitor to the computer as the core of digital, network-based development has become an indisputable fact, and IP Multicast can reduce the occupied bandwidth, reduce server load and improve the quality of the data transmission characteristics of the inevitable aspects of video transmission on the highway exert a great advantage.Then introduce three developed stages of the system and the development at home and abroad. And detail introduce IP multicast technology by Working principle of IP multicast, IP multicast to achieve the prerequisite, IP Multicast implementation process, IP multicast routing protocol, IP multicast's advantages and disadvantages.Then focus on IP multicast-based highway video monitoring system to analysis and design. Article analyzed Jilin Provincial Expressway the video monitoring system and monitoring system architecture model. It designed system function, system scheme, multicast address and port, system software. Develop a set of video application software based on C / S management model to support management of IP multicast and hardware devices on the system of selection and IP multicast transmission method is to plan. And be successful applied to IP Multicast Technology in Jilin Province Highway Video Monitoring System successful. Finally, this article summarizes the work done, analysis and evaluation, to identify shortcomings, and prospects for future development.In this paper, the development of Jilin Province highway have very important meanings: First, it meets the Highway Authority requests that the Center monitor the implementation of dynamic real-time remote monitoring and control purposes. Second, as the future of intelligent transportation information platform for the most important, it is the video monitoring (traffic monitoring and traffic control) and traffic information automatically management is the first step towards the highway ITS. Third, it can be extended widened to other applications, greatly improve the management efficiency and level of automation. Such as some large-scale industrial production, banking, power, intelligence community, and public security systems.This article is innovation: the use of all-digital design of the highway network video monitoring systems to IP addresses to identify all of the monitoring equipment, the use of TCP / IP protocol for image, voice and data; the IP multicast technology in the highway video monitoring system; the abolition of the system matrix video switching, use of digital video implementation virtual matrix switch in the wall of television.