Example: LIFO Queue Waiting Time - MATLAB & Simulink Example

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Contents

Index

• Getting Started

Resources for Learning

Information About Related Products

Limitations on Usage with Related Products

Overview of Events

Relationships Among Events

Overview of the Model

Opening the Model

Examining Entities and Signals in the Model

Key Components of the Model

Running the Simulation

Overview of the Example

Opening a Model and Libraries

Moving Blocks into the Model Window

Configuring Blocks

Connecting Blocks

Running the Simulation

Exploring the D/D/1 System Using the SimEvents Debugger

Exploring the D/D/1 System Using Plots

Information About Race Conditions and Random Times

Overview of the Example

Opening a Time-Based Simulink Demo

Adding Event-Based Behavior

Running the Hybrid F-14 Simulation

Confirming Event-Based Behavior Using the SimEvents Debugger

Visualizing the Sampling and Latency

Event-Based and Time-Based Dynamics in the Simulation

Modifying the Model to Drop Some Messages

Meaning of Entities in Different Applications

Entity Ports and Paths

Data and Signals

Creating Entities in a Model

Varying the Interpretation of Entities

Data and Entities

Introduction to the Time-Based Entity Generator

Definition of Intergeneration Time

Approaches for Determining Intergeneration Time

How to Specify a Distribution

How to Specify Intergeneration Times from a Signal

Example: Using Random Intergeneration Times in a Queuing System

Example: Using an Arbitrary Discrete Distribution as Intergeneration Time

Example: Using a Step Function as Intergeneration Time

Behavior and Features of Queues

Physical Queues and Logical Queues

Accessing Queue Blocks

Behavior and Features of Servers

What Servers Represent

Accessing Server Blocks

Varying the Service Time

Constructs Involving Queues and Servers

Example of a Logical Queue

Definition of Entity Paths

Implications of Entity Paths

Overview of Routing Library for Designing Paths

Role of the Output Switch

Sample Use Cases

Example: Selecting the First Available Server

Example: Using an Attribute to Select an Output Port

Role of the Input Switch

Example: Round-Robin Approach to Choosing Inputs

Role of the Path Combiner

Sequencing Simultaneous Pending Arrivals

Difference Between Path Combiner and Input Switch

Overview of the Example

Generating Packets

Storing Packets in Input Buffers

Routing Packets to Their Destinations

Connecting Multiple Queues to the Output Switch

Modeling the Channels

• User's Guide

• Release Notes

Example: LIFO Queue Waiting Time

This example compares the FIFO and LIFO disciplines in a D/D/1 queuing system with an intergeneration time of 0.3 and a service time of 1 (open model).

Modeling Queues and Servers

Modeling Queues and Servers

Sorting by Priority

Sorting by Priority

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