Design And Implementation Of IP-based Multimedia Trunked Communication System

Dedicated private network, high price and high maintenance cost are always the restrictive factors for the trunked communication development in the domestic. Considering both the price and performance, this paper designs and implements an IP-based multimedia trunked communication system.According to the function, performance and other requirements, the detailed analysis and design are carried out for the structure, workflow and control protocol of this system. The system is divided into four parts:the session server, the application layer multicast platform NaradaBrokering, the PC client and the Android mobile phone client. On the basis of analyzing and testing the application layer multicast platform NaradaBrokering, this paper designs and implements the session server and the PC client respectively, and debugs with the mobile phone client.This system has no need of laying special network and purchasing dedicated terminal equipments, which reduces the cost greatly. Meanwhile, the usage of modularity and layering in the design process makes it relatively simple and convenient for the system to expand, improve and maintain its functions. Tested, the system can meet users'requirements in terms of function and performance, and also achieves the balance between price and performance.