| With the development of mobile instant messaging, Mobile network is deeply influenced by its special business model and large number of users. However, the idea of current instant messaging service is still not completely free from the original fixed access.The development and operation of mobile instant message can not meet the characteristics of mobile networks, and there are lots of shortages for the optimization of instant message in mobile network. The experience of end-user is bad, such as dropped calls, packet loss, latency and other issues. The further development is restricted by these problems of mobile instant message. Therefore, the analysis of the characteristics of mobile instant messaging, and the optimization for network has become an important aspect of business operations for mobile instant message.Firstly, it is analyzed the present service situation of the development of mobile instant message, the mobile network architecture, core functionality and the system processes are defined certainly. Based on it, an analysis about the business characteristics, user characteristics of distribution, and the requirements of network load based on mobile instant message are performed. A system simulation of network has been completed based on Matlab. It is analyzed the network bearing requirements by the different service characteristics, which is focused on the pressure influences, bottlenecks and other factors by the services. Finally, a method of optimization is analyzed from the client of the terminal, network, server and other aspects. Optimal technical solutions for mobile instant message are achieved. |