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Mixed-Criticality Industrial Wireless Networks

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This open access book introduces how to manage important tasks in industrial wireless networks.

 

Important tasks must be completed on time and with guaranteed quality; that is the consensus reached by system designers and users. However, for too long, important tasks have often been given unnecessary urgency, and people intuitively believe that important tasks should be executed first so that their performance can be guaranteed. Actually, in most cases, their performance can be guaranteed even if they are executed later, and the “early” resources can be utilized for other, more urgent tasks. Therefore, confusing importance with urgency hinders the proper use of system resources. In 2007, mixed criticality was proposed to indicate that a system may contain tasks of various importance levels. Since then, system designers and users have distinguished between importance and urgency. 

 

In the industrial field, due to the harsh environment they operate in, industrial wireless networks’ quality of service (QoS) has always been a bottleneck restricting their applications. Therefore, this book introduces criticality to label important data, which is then allocated more transmission resources, ensuring that important data’s QoS requirements can be met to the extent possible. 

 

To help readers understand how to apply mixed-criticality data to industrial wireless networks, the content is divided into three parts. First, we introduce how to integrate the model of mixed-criticality data into industrial wireless networks. Second, we explain how to analyze the schedulability of mixed-criticality data under existing scheduling algorithms. Third, we present a range of novel scheduling algorithms for mixed-criticality data. 

 

If you want to improve the QoS of industrial wireless networks, this book is for you.

Author(s): Xi Jin, Changqing Xia, Chi Xu, Dong Li
Publisher: Springer
Year: 2023

Language: English
Pages: 136
City: Singapore

Preface
Acknowledgments
Contents
1 Introduction
1.1 Industrial Wireless Networks
1.1.1 Network-Based Intelligent Manufacturing Systems
1.1.2 Industrial Communication Requirements
1.1.3 Classical Industrial Wireless Networks
1.1.3.1 WirelessHART
1.1.3.2 WIA-PA
1.1.3.3 WIA-FA
1.1.3.4 ISA100.11a
1.2 Mixed Criticality
1.2.1 Mixed Criticality Overview
1.2.2 Mixed Criticality in Industrial Wireless Networks
1.3 Book Organization
References
2 Schedulability Analysis of Mixed-Criticality Data Under Fixed-Priority Scheduling
2.1 Background
2.2 System Model
2.2.1 Mixed-Criticality Wireless Network Model
2.2.2 Fixed Priority Scheduling
2.3 End-to-End Delay Analysis
2.3.1 Analysis for Single-Criticality Networks
2.3.1.1 Pseudo Delay
2.3.1.2 Worst Case Delay
2.3.2 Analysis for Mixed-Criticality Networks
2.3.2.1 Analyzing Rk(H)
2.3.2.2 Analyzing Rk(L2H)
2.4 Performance Evaluations
2.4.1 Simulations
2.4.2 Real Testbed
2.5 Summary
References
3 Schedulability Analysis of Mixed-Criticality Data Under EDF Scheduling
3.1 Background
3.2 System Model
3.2.1 Network Model
3.2.2 Mixed-Criticality Network
3.2.3 EDF Scheduling in Industrial Networks
3.3 Problem Formulation
3.4 Demand-Bound Function of Industrial Networks
3.4.1 Analysis of Single-Criticality Networks
3.4.2 Analysis of Mixed-Criticality Networks
3.4.3 Tightening the Demand Bound Functions
3.5 Performance Evaluations
3.6 Summary
References
4 Mixed-Criticality Scheduling for TDMA Networks
4.1 Background
4.2 System Model
4.3 Problem Statement
4.4 Scheduling Algorithm
4.4.1 A Slot-Stealing Scheduling Algorithm
4.4.2 Node Working Mode
4.5 Scheduling Analysis
4.5.1 Analyzing Method for Single-Criticality Networks
4.5.1.1 Total Interference
4.5.1.2 Worst Case Delay in Single-Criticality Networks
4.5.2 Mixed-Criticality Scheduling Analysis
4.6 Performance Evaluations
4.6.1 Scheduling Algorithm
4.6.2 Analyzing Method
4.7 Summary
References
5 Mixed-Criticality Scheduling with Multiple Radio Interfaces
5.1 Background
5.2 System Model
5.2.1 Network Model
5.2.2 Mixed-Criticality System
5.2.3 Fixed Priority Scheduling
5.3 Problem Statement
5.4 Scheduling Algorithms
5.4.1 Finding Candidate Nodes
5.4.2 Slot Analyzing Algorithm
5.4.3 Priority Inversion Algorithm
5.4.4 Algorithm Analysis in High-Criticality Mode
5.5 Performance Evaluations
5.5.1 Low-Criticality Mode
5.5.2 High-Criticality Mode
5.6 Summary
References
6 Mixed-Criticality Scheduling on 5G New Radio
6.1 Background
6.2 Problem Statement
6.3 Scheduling Algorithm
6.3.1 Basic Scheduling Algorithm
6.3.2 Analysis
6.3.3 Improved Algorithm
6.4 Performance Evaluations
6.4.1 Evaluations Based on A Real Testbed
6.4.2 Evaluations Based on Random Test Cases
6.5 Summary
References
7 Conclusions and Future Directions
7.1 Conclusions
7.2 Future Directions