Research On Distribution Of Active Video Recovery Based On Optical Fiber Communication

With the advent of the big video era,high-definition video has brought great challenges to the carrying capacity of optical fiber transmission networks.The dissertation focuses that,the edge CDN sinks the optical line terminal,opens the link of the same layer of optical fiber communication network equipment,and at the same time builds a platform ability based on the home optical network terminal,to realize the instant distribution of videos by the active recovery method,and to guarantee low delay video transmission scheme via optical fiber communication.The main work of the dissertation is as follows:(1)Design a four-step reconstruction plan for the hardware layer architecture of optical fiber communication network.The first is to open the optical fiber communication link of the east-west direction in the same layer equipment to realize the control of the flow range and reduce the transmission delay.The second is that the edge CDN sinks and connects to the optical line termination optical interface to realize the compression of the fiber physical transmission distance and improve the responsiveness of the point-to-point optical fiber communication.The third is to deploy regional scheduling within optical line terminals to achieve efficient collaboration of optical fiber communication in content transmission.The fourth is to build a home platform on the optical network terminal,by configuring the internal and external interfaces of the home,it can fully exploit the performance of the home hardwares and accelerate the intelligent management of the optical fiber communication network.(2)Design a software layer transmission scheme of optical fiber communication network.The first is to design video preprocessing.Divide the complete source slicing video into pre-push sections(selecting a core slice)and deploy it on the edge CDN.The remaining slices and core slices are subjected to exclusive OR operations to generate each piece of associated information file by bit.After the text is compressed,it is deployed to the home optical network terminal.The advantage of high compression ratios increases the transmission efficiency of the optical fiber communication and greatly relieves the load pressure of the optical network terminals.The second is to design fiber transmission packets.Such as core chip packet,recovery associated information packet,capability statistics packet,video request packet and so on.Control packet format size to reduce the error phenomenon in optical fiber communication process and speed up the transmission efficiency.The third is to design optical network domain recovery.The source slice information is generated through the core slice and associated information file,and then the information format is encapsulated to turn into a standard slice video.The fourth is to design optical domain process.The optical line terminal is used as the scheduling core,and content is transferred and pushed though optical fiber communication between edge CDN and home optical network terminal group.Depend on OPNET,MYSQL,and VS2013,to simulate the proposed solution.The simulation shows that in the analog 720P video process,when the edge CDN is pre-pushed for 60 seconds,the requesting node completes the reception of the entire recovery video slice in 4.594 seconds;the process of analog 1080P video has the same pre-pushing time and the requesting node takes 9 seconds.Both have the same the first play delay of 0.494 seconds,and they never have stopped.The simulation results are significantly better than the current optical fiber communication network operations.