Design And Implementation Of Distributed KVM Seats

With the construction of smart city,modern data center,command center,operation center,etc.all need cross network,cross system,cross application,cross department,and multiple kinds of data applications.How to make operators "fast,simultaneous,and comparative" to deal with multiple different data applications and realize information and cooperation related Affairs among operators has gradually become a modern information management Important requirements of the platform.Therefore,this paper designs a KVM seat system based on the distributed application requirements.It can manage,operate and schedule all kinds of image resources,application resources,data resources,according to the specified collaborative process and seat control authority,shorten the response time and improve the overall response ability,which will become the main trend of people's office,collaborative interaction and management in the future.The specific research results of this paper are as follows:By adopting codec based on JPEG2000 codec standard on the processor,an ultra-low-latency lossless compression transmission solution with an output image resolution of 3840x2160@30Hz with a delay of 50 ms is realized..It solves the practical problem of "low latency" and "high image quality" of video images in the distributed KVM agent system in actual use.A user-friendly OSD human-computer interaction operation menu is designed and implemented as a method for the seat node control operation of the distributed KVM system.Through the OSD menu,not only can the traditional KVM device be connected to different computer mainframe functions,but also the operating functions of the agent push and capture are added,which makes the operation more convenient and efficient.Especially on the basis of the implementation of the OSD menu,the design of the rights management for different agent nodes is realized,which plays a more prominent role in some confidential places.Designed and implemented a USB mouse and keyboard cross-screen roaming function with security protection.Through the research on the relative coordinate andabsolute coordinate protocol of the mouse,the calculation method of mutual conversion and elimination of conversion error is proposed,which solves the problem of "edge detection" encountered in the realization process of the USB mouse and keyboard cross-screen roaming function.Then,by using the USB data stream channel and the video data stream channel to switch independently,the USB mouse and keyboard cross-screen roaming function is successfully realized.However,since the USB data stream of all the mouse and keyboard in the design of the system is to be forwarded by the TCP/IP network,in order to prevent the behavior of the computer host in the intrusion control system by monitoring the mouse and keyboard data stream in the network,We have added a security protection mechanism based on the USB mouse and keyboard cross-screen roaming function.Before the USB mouse and keyboard data is sent in TCP/IP encapsulation,the data is encrypted by the 3DES encryption algorithm,and then the encrypted ciphertext is encapsulated by TCP/IP and then transmitted on the network.After receiving the ciphertext data,the receiving end first receives the ciphertext data.It is decrypted by 3DES and sent to the host computer to realize the function of the mouse and keyboard.This can prevent someone from invading the host computer in the control system by monitoring the network.Designed and implemented the KVM agent visual streaming platform function,including Nginx and ffmpeg-based streaming media server and KVM agent visualization client software,which enables back-office managers to directly manage all KVM agents directly through KVM agent visualization client software.And monitoring,greatly improving the efficiency of managers.Finally,the paper carried out detailed functional tests on the design system,and the performance of the system reached the requirements set by the initial design.At the same time,it also analyzes the shortcomings in the current research and looks forward to the research direction of the next stage.