Research And Implementation On ATN IDRP Protocol Based On OPNET

Now, as the rapid development of civil aviation, the deficiency of Aeronautical Telecommunication Network (ATN) based on the Open System Interconnection (OSI) model, becomes more and more obvious. It not only limits the capacity of ATN and its further improvement, but also can't support the security, privacy and multicast technology. Conversely, with the growth of IP technique, applying IP technique in ATN attracts more and more attentions over the world. However, because the ATN network is a large-scale network, and some related experiments can't be done on it, so how to simulate ATN network and its protocols in laboratory is becoming a hot point in this field. Due to this background,this paper mainly researchs how to build an IDRP protocol model based on OPNET.Combining with the anlysis of ATN network architecture and basic knowledge of naming and addressing, this paper has well researched the ATN routing protocol (Inter Domain Routing Protocol IDRP). It analyzes the working layer, basic component and principle of IDRP, and particularly researches the BIS-BIS protocol, IDRP's concept such as routing selection, aggregation, reduction, and send out the relationship of the above three concepts. At last, it describes the support of mobile routing.In the last part of this paper, it introduces the OPNET network simulation software, and gives the IDRP protocol model on this platform. This paper uses two processes to describe IDRP protocol. The first one is root process idrp, and the other is child process idrp_conn. Then, it describes and implements the two processes by the finite state machine (FSM). It gets the basic function of IDRP through this FSM. At last, the IDRP model is simulated in OPNET, and the result shows that the model achieves the funtions defined in IDRP protocol.