Design Of VAR Multi-Services Optical Transmission And Switching Integrated System

With the development of the society, people’s opinion on safety is improving, and the video surveillance transmission system is being improved from the traditional analogy, localization to digitization, service diversification, function integration, and modularization. For these purposes, we designed the VAR multi-services optical transmission and switching integrated network platform. It uses advanced high-speed optical transmission technology and special network truss with optical self-healed ring. It also can transport multiple signals as real-time video, compressed video, voice, and ethernet data, etc. The VAR network can connect to any existed network, and the switch ability of VAR system can be 16-20G. This paper mainly introduces the design and realization of CPU control system for VAR system.Firstly, the paper describes the developmental situation of video surveillance system and study purpose of VAR system. Secondly, it is about the logical structure, network topology of VAR system and the function and composition of VAR sub-modules.Then, it is the introduction about the hardware of CPU control system and its peripheral circuits, data transmission protocol and control protocol of VAR system. In this paper, the core is the implementation of embedded software of CPU control system, including the transplantation of embedded Linux at the target board, the constitution of the environment for embedded cross compile, the realization of communications protocol, the implementation of software-driven program as well as the design and implementation of various modules of CPU control system. Finally, it recalls the design of entire system and proposes a number of open issues.