Simulation system of simulating switched Ethernet clock synchronization

Abstract

The invention discloses a simulation system of simulating switched Ethernet clock synchronization. The simulation system comprises an Ethernet protocol instruction database, a timer, nodes, a link attribute configuration module, a synchronization topology generation module, a state management module, a state conversion module, a data processing module, a fault detection and processing module, a clock correction module and a result output module. The Ethernet protocol instruction database and the timer satisfy an IEEE802.3ISO / IEC8802-3 standard specification and instruction and state association information indicated in SAEAS6802. The nodes and the link attribute configuration module are used to carry out simulation role configuration so as to obtain a synchronization topology structure. Then, state role management is performed on each node in the synchronization topology structure and different state roles are used to carry out data processing, clock correction and fault detection. And then a state and clock correction result is output. Compared to the current simulation system, by using the simulation system of the invention, strong scalability is showed on an aspect of network model establishment, which is convenient to carry out an effective analysis on a clock synchronization process.

Description

technical field [0001] The present invention relates to a simulation system based on Ethernet, more particularly, refers to a simulation system for establishing and maintaining clock synchronization by simulating switched Ethernet. Through this system, users can simulate the clock synchronization process of switched Ethernet in different situations according to their needs. Background technique [0002] Ethernet is a type of computer local area network (technology) that meets a set of standard specifications. The so-called set of standard specifications mainly refers to a series of standards such as IEEE802.3ISO / IEC8802-3, IEEE802.12ISO / IEC8802-12 or IEEE802.11ISO / IEC8802-11, HiperLAN2 and other standards; This set of protocols regulates connected data communication networks. Refer to "Ethernet Technology and Application" edited by Wang Tingyao, first edition in January 2005, pages 4 to 7. In the block diagram of an example of the composition of an Ethernet, an Ethernet i...

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Problems solved by technology

At present, the simulation of the time-triggered Ethernet clock synchronization mechanism is mainly implemented by FPGA or ordinary CPU. These simulation methods usually need to design a fixed model and topology structure. The delay value of the node and the online transmission delay time are determined by the hardware itself. , there will be some conflicts or packet loss in the actual transmission process, only the clock synchronization limited by the hardware level can be established, and the simulation process cannot be modified arbitrarily in a short period of time, and the flexibility is poor

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