SIMULATION MODEL FOR MULTICHANNEL PRIORITY SERVICE OF REDUNDANT DATA TRANSFER SYSTEM

• Main Author: I. A. Slastikhin
• Format: Article
• Language: English
• Published: Saint Petersburg National Research University of Information Technologies, Mechanics and Optics (ITMO University) 2018-05-01
• Series: Naučno-tehničeskij Vestnik Informacionnyh Tehnologij, Mehaniki i Optiki
• Subjects: network; priorities; redundant transmission; simulation modeling
• Online Access: http://ntv.ifmo.ru/file/article/17799.pdf

Subject of Research. Thepaper presents analysis of the priority exchange effectiveness, taking into account the unreliability of transmissions in data transmission systems represented by multichannel queuing systems with a common queue. The aim of the work is the study ofefficiency upgrading possibility for priority data exchange in conditions of unreliable transmissions while communication channels are reserved. Method.The efficiency analysis of the redundant packet transmissions is carried out on the basis of simulation modeling. The complex efficiency of the redundant packet transmission is determined on the basis of the multiplicative index, which takes into account the error-free transmission and the average time margin relative to the maximum permissible transmission delay. Main Results.The simulation model of data transmission system with the introduction of priorities and transmission redundancy of time-critical queries is proposed. Simulation experiments were carried out on efficiency evaluation at the increase of priority and the redundancy multiplicity of time-critical queries. The existence of effectiveness field for the application of priority redundant transmissions of critical-to-latency queries is shown.Practical Relevance. The presented results can be used in the design of high-reliable computer systems including computer systems providing information services