Attribute Value Support :: Working with Entities (SimEvents®)

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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

• Working with Entities

• Generating Entities When Events Occur

• Specifying Generation Times for Entities

• Setting Attributes of Entities

• Manipulating Attributes of Entities

Accessing Attributes of Entities

• Counting Entities

• Combining Entities and Allocating Resources

• Replicating Entities on Multiple Paths

Attribute Value Support

• Working with Events

• Managing Simultaneous Events

• Working with Signals

• Modeling Queues and Servers

• Routing Techniques

• Regulating Arrivals Using Gates

• Forcing Departures Using Timeouts

• Computations on Event-Based Signals

• Plotting Data

• Using Statistics

• Using Stateflow Charts in SimEvents Models

• Debugging Discrete-Event Simulations

• Learning More About SimEvents Software

• Migrating SimEvents Models

• Configuration Parameters

• Model Advisor Checks

• Release Notes

Attribute Value Support

These lists summarize the characteristics of attribute values.

Permitted Characteristics of Attribute Values

Real or complex
Array of any dimension, where the dimensions remain fixed throughout the simulation
double data type

For a given attribute, the characteristics of the value must be consistent throughout the discrete-event system in the model.

Not Permitted as Attribute Values

Structure
Data types other than double. In particular, strings are not valid as attribute values.
Bus
Variable-size signals or variable-size arrays
Frame

Replicating Entities on Multiple Paths

Replicating Entities on Multiple Paths

Working with Events

Working with Events

Free Discrete Event Simulation Technical Kit

Model electronic system architectures, process flows, and logistics as queuing systems or agent-based systems.

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