The Research On Instant Messenger Based On Graphs

In Nov. 1996, Miralilis Company develops the first Instant Messenger named ICQ (Means I seek You) in the world, which changed the modal of Internet users' communicating. And it created the concept of Instant Messenger first time. Instant messenger has the functions for tracking Internet users' online status and communicating on each other. More different than e-mail etc. software is the function for tracking Internet users' online status.More and more Instant Messengers are developed. Up to now, there are ICQ, MSN Messenger, QQ, Yahoo! Messenger, SinaPager, Sohu I Seek You, Netease Face to Face, RealLink, VVQ and so on, which are support to transfer text, file, audio or video information. With the improvement of technologies and demands, the application area of Instant Messenger is from person to group, as telemeeting, telelearning etc. Medias are demanded to cover text, graph, picture, audio and video order to simulate tele-environment. However, There are some questions about Instant Messenger: Firstly, Instant Messengers existed can't support to draw instantly graphs for communicating with others because there is no environment to draw graphs in the local computer in Instant Messengers. Secondly, or can do it, but for transferring too large picture encode data, the Instant Messengers are only running in local area networks, not in Internet. So not to support to draw instantly for communicating with other is on of balks for developing Instant Messengers. Based on the status and tide of Instant Messengers, aim at above questions, this dissertation brings forward some solutions: Firstly, refer to a modal of Instant Messengers based on graphs. Secondly, in order to solve the tools of drawing graphs, develop the tools in instant messengers' clients. Third, carry out strategy of transferring graphs' characters information and reverting the graphs in tele-client step by step, to solve to transfer large data and fit to run in Internet.First, This dissertation discusses Instant Messengers status quo, tide and some questions, and put forward solution for developing Instant Messenger based on graphs. Secondly, it discusses theories of representation of graph characters, TCP/IP protocol and three layers system structure, based on which we give a notion modal of Instant Messenger based on graphs. There are three-layer and based on TCP/IP system structure and function modals consisted of user management modal, graphs communicating modal and history record modal etc. in this notion modal. Third, it discusses the system designing, analyses database or table structures and logical modals of sending or receiving information, communicating with graphs and saving or reverting history records. Last, it gives a solution of carrying out system, and runs an example of Instant Messenger to improve gathering tools of graphs and strategy of transferring graph characters is useful supporting to draw instantly pictures in Internet.This dissertation bases on the hypothesis of complex graphs consisting of basic ones. Itmainly analyses solutions of basic graphs designing and carrying out. But graphs are complex and there are more types, different solutions. So by the strategy of transferring graph character step by step, we need to research on solutions of drawing, coding and transferring instantly graphs.