Reliable Transmission Service Based On Service Metadata Architecture Modeling

At the present time, the practical network structures are all layered architecture, and TCP/IP dominates the Internet. TCP/IP was developed for narrowband text transfer.Now, with the rapid development of global Internet, people avail the network and depend on it more and more, but because of the original designing mechanism, the layered architecture can't satisfy peoples demand correspondingly, and the disadvantage of TCP/IP becomes obvious in such cases.Now there are two research ways on the network architectures, the first one is to mend on the TCP/IP, which can't solve the problem because it still works on the layered archicture. The other one is to study new architecture, and this is the radical way to solve the problem.This article introduces a Service Unit based Network Architecture (SUNA), mainly analyse the features of the structure.The emphases of this article is the introduction of the design and validate of the reliable data trasnfer service which based on the server union, including framework, communication model and flow chart. Based on that, this paper introduces the math define and application scope of Petri Nets and Colored Petri Nets, formalizes description of the reliable data transfer service by CPN Tools, builds the Reliable-CPN model, and launches the simulation analysis and dynamic analysis.In this article, we describe several aspects of the reliable service carefully, including property and strategy of reliable data transfer service. We build the simulation model which describes the basic state and transmition of the reliable service. The simulation report and dynamic analysis results both prove the reliable data transfer service and communication are correct. At last, we give the advice for later work.The establishment of CPN model proves the reliable data transfer service which based on the MCES in Petri Nets theory for the first time, the simulation model's design and validate is a helpful reference for our later task to validate the protocol in theory.