The service element network architecture uses end-to-end virtual circuits to realize data transmission. In view of this data transmission method, an improved sliding window protocol is proposed to ensure reliable data transmission of the service element network architecture, and the Colored Petri Net (CPN) modeling tool is used to verify the reliability and completeness of this mechanism.
Abstract: The service element network architecture uses end-to-end virtual circuits to realize data transmission. For this data transmission method, an improved sliding window protocol is proposed to ensure reliable data transmission of the service element network architecture, and a coloring net (Cpn) is used The modeling tool verified the reliability and completeness of the mechanism.
01Introduction
The current practical network architectures are all hierarchical structures, and TCP/IP is the mainstream technology system currently used on the Internet. Since the original TCP/IP protocol stack was developed for narrowband text data, with the booming development of the global Internet, people’s utilization and dependence on the network have increased, and various new network services have continued to emerge, thus raising questions about the performance of the network. In order to meet higher requirements, the limitations brought by the TCP/IP layered network system are becoming more and more prominent.
Since the 1990s, people have adopted different methods to improve network performance [1~4]. In recent years, non-hierarchical computer network architectures have emerged, which are role-based network architecture [5] and Service Unit based Network Architecture (SUNA) [6].
Since SUNA uses an end-to-end virtual circuit method to transmit data, which is different from the datagram transmission method of the TCP/IP protocol, this paper proposes an improved sliding window protocol to ensure reliable data transmission of the service element network architecture.
CPN7. Evolved from Petri nets, it has been widely used in system modeling, computer software technology, automatic control systems, network communication protocol engineering, etc. 8]. This article gives the reliable data transmission mechanism of SUNA, and uses the CPN modeling tool to model, simulate and analyze the mechanism. The analysis results show that SUNA’s reliable data transmission mechanism is correct, feasible and complete.
Service Element Network Architecture (SUNA)
SUNA is a new type of hierarchical network architecture. There is no longer any hierarchy in this structure, and its network functional components are service elements. Each service element completes relatively independent network functions and does not transfer services to each other.Different service elements can be coordinated and coordinated
Implement various network functions and provide various services for applications.
SUNA is a collection of service elements and the rules for their interaction with each other. A service element is the smallest entity that can provide services while hiding internal details. The service provided by the service element is completed through the service data unit SDU. The service element is the sender, receiver, forwarder or converter of SDU.
Since each service element completes a basic network function, the service element system can be easily expanded and customized; services are not transferred between service elements, which ensures that network functions will not be redundant. The interface and interaction between service elements is very simple. The network system formed by the combination of service elements has the advantages of simple logic, easy implementation, high efficiency, no redundancy, and good scalability. It is a system that can meet the three requirements of modern applications for the network: improving service quality, broadband transmission of multimedia information, and ensuring security. new network architecture.