Design And Implementation Of Downlink Transmission Of Convergent Emergency Communication Based On Radio And TV Network

In recent years,many major natural disasters have occurred in the world.In these incidents,regional communication is often interrupted due to the destruction of communication facilities.There are also various emergency events such as major conferences and major events.The content of this paper is aimed at The radio and television multi-link convergence emergency transmission studied in these cases.Based on the national key R&D project “Research and Application Demonstration of Key Technologies for Integrated Emergency Communication Based on Radio and TV System”,this paper completes the multi-link fusion of broadcasting and TV based on the previous system networking scheme for the application scenario and actual needs.The design of the emergency transmission software solution and the software implementation of each major functional module.First analyze the test requirements,then design the simulation plan and perform the simulation test.Based on the background and requirements of radio and television multi-link convergence emergency transmission,this paper introduces the radio and television wireless transmission link,briefly introduces the system's radio and television multilink convergence emergency transmission scheme and the system's uplink and downlink service transmission process,and introduces the related technology of the paper background.The specific encapsulation field of the LLC is designed according to the IP over Multi-Tunnel protocol.This paper studies the problem of multimedia channel transmission with channel-aware convergence,and proposes the key technology of IP over DTMB based on IP over Multi-Tunnel protocol and two-way data transmission using FM/CDR to realize and distribute the aggregation server.Design and implementation of downlink converged communication software.In order to test the system function and performance according to the requirements,it is necessary to build a simulation test system.This time,based on the project,the design and implementation of the integrated emergency communication system software solution is completed,and the simulation test platform for building the mobile emergency system is completed.The simulation platform completes the verification of the link detection and link simulation functions of the multimode terminal,the mobile communication vehicle,and the distribution aggregation server in the project,and completes the system function and performance test.