Design And Implementation Of Multimedia Communication System Based On Sip Protocol

With the rapid development of mobile Internet,the traditional and single form of communication has been unable to satisfy people's needs.A functional multimedia communication platform with compatibility is gradually becoming a stronger demand.At the same time,devices based on SIP are widely used,and the communication industry will continue to apply more SIP devices to the living and production environment in the future.Therefore,the realization of platform,which can allow various types of terminals to access and provide rich communication services,can not only improve the utilization of existing SIP devices,but also integrate current popular web tenninals.Moreover,it can be applied to many kinds of scenarios.The communication system proposed in this paper is based on SIP protocol and adopts centralized media control scheme,which can maximize the compatibility of terminals and provide rich communication services.During the design and implementation of communication system,multimedia application server is the important network entity.And it can support multi-node deployment and cross-node communication,which further improves the expanding and carrying capacity of communication system.During the process of design,we propose a unified communication strategy based on priority queue.And we also propose a system request control scheme combining token bucket algorithm and recurrent neural network algorithm,which can guarantee the stability and reliability of the system.Following the basic steps of software engineering,we describe the specific situation in the process of developing the subject step by step.Firstly,the requirement analysis is carried out according to the specific application scenarios of the system,and the three business types of point-to-point communication,conference communication and instant messaging and their specific functions are described.Secondly,the architecture of the system is designed,and the selections of key solutions are studied such as terminal compatibility and media control.Then,the core entity is designed based on modularization,including user and authentication module,communication module,monitoring module and management module.And we use state mode during the design of signaling interaction and state maintenance schemes for different functional items in communication module.Based on the above analysis,the implementation details of the communication system,such as the application of middleware,the design of data structure and multi-threading technology,are introduced.Finally,we design test cases for functional and performance testing.And the results show that the communication system studied,designed and implemented in this paper can satisfy the expected requirements and is of good feasibility.