The approximation of envelope in «Network calculus» applications

The basic «Network calculus» theory rules are considered, having concern to queuing systems parameters calculations. The role of arrival curve (envelope) is clarified. A method of linear envelope calculation is proposed; the corresponding optimization problem is set and solved. Examples of one- and two-component linear envelopes calculations are given, as well as of corresponding service times (delays) and backlogs for I&C software queuing system.