Open Elective • IT 604(C) • VI Semester

Wireless Sensor Networks

Complete subject page for RGPV Information Technology VI Semester students. Study WSN architecture, MAC protocols, routing, query processing, localization, power conservation and sensor-network security unit by unit.

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About Wireless Sensor Networks

Wireless Sensor Networks consist of spatially distributed sensor nodes that sense physical or environmental conditions, process collected information and communicate wirelessly. This subject introduces the architecture, communication protocols, routing methods, localization techniques, energy-management mechanisms and security requirements used in sensor networks.

The course focuses on the practical limitations of sensor nodes, including limited energy, processing power, storage and communication range. It also explains how WSN protocols are designed to remain scalable, reliable and energy efficient.

Course Objectives

Understand basic Wireless Sensor Network technology and supporting protocols.
Understand medium-access-control protocols and physical-layer issues.
Learn localization concepts used in wireless sensor networks.
Understand energy efficiency and power-control mechanisms.
Understand security challenges and protection mechanisms in sensor networks.

Unit-Wise Syllabus

I

Overview and Architecture of WSN

This unit introduces the basic structure, background technologies and architecture of wireless sensor networks.

  • Overview of Wireless Sensor Networks
  • Network characteristics
  • Network applications
  • Network design objectives
  • Network design challenges
  • MEMS technology
  • Wireless communication technology
  • Hardware and software platforms
  • Wireless Sensor Network standards
  • Network architectures for WSN
  • Classification of Wireless Sensor Networks
  • Protocol stack for Wireless Sensor Networks
WSN Basics MEMS Architecture Protocol Stack
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II

MAC, Routing and Data Dissemination

This unit explains medium-access control and major routing and data-dissemination approaches used in WSN.

  • Fundamental MAC protocols
  • MAC design for Wireless Sensor Networks
  • Contention-based protocols
  • Contention-free protocols
  • Hybrid protocols
  • Routing fundamentals and challenges
  • Taxonomy of routing and data-dissemination protocols
  • Location-aided protocols
  • Layered and in-network processing protocols
  • Data-centric protocols
  • Multipath-based protocols
  • Mobility-based protocols
  • QoS-based protocols
  • Heterogeneity-based protocols
MAC Routing Data-Centric QoS
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III

Query Processing, Aggregation and Localization

This unit covers data-query processing, aggregation and methods used to determine the position of sensor nodes.

  • Introduction to query processing in WSN
  • Query processing in Wireless Sensor Networks
  • Data aggregation in Wireless Sensor Networks
  • Node-localization concepts
  • Challenges of node-localization technologies
  • Ranging techniques for Wireless Sensor Networks
  • Wireless-localization algorithms
  • Wireless sensor-node localization
Query Processing Aggregation Localization Ranging
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IV

Energy Efficiency and Power Control

This unit explains why energy conservation is essential and how power is conserved across different layers.

  • Need for energy efficiency in WSN
  • Need for power control
  • Passive power-conservation mechanisms
  • Physical-layer power conservation
  • MAC-layer power conservation
  • Higher-layer power conservation
  • Active power-conservation mechanisms
  • MAC-layer active mechanisms
  • Network-layer active mechanisms
  • Transport-layer active mechanisms
Energy Efficiency Power Control MAC Layer Transport Layer
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V

Security in Wireless Sensor Networks

This unit focuses on network-security fundamentals, WSN-specific threats and protection mechanisms.

  • Fundamentals of network security
  • Security challenges in Wireless Sensor Networks
  • Security attacks in sensor networks
  • Protocols and mechanisms for security
  • IEEE 802.15.4 security
  • ZigBee security
WSN Security Security Attacks IEEE 802.15.4 ZigBee
Open Unit 5 Notes →

Unit-Wise Quick Overview

Unit Main Area Key Exam Topics
Unit I Introduction and architecture Characteristics, applications, MEMS, architecture, classification and protocol stack
Unit II MAC and routing Contention-based, contention-free, hybrid MAC, routing taxonomy and data dissemination
Unit III Data processing and localization Query processing, aggregation, ranging and localization algorithms
Unit IV Energy efficiency Passive and active power-conservation mechanisms across different layers
Unit V WSN security Security challenges, attacks, protocols, IEEE 802.15.4 and ZigBee security

Important RGPV Exam Areas

Download Study Resources

Unit-wise PDFs, important questions and PYQ analysis will be added here.

Complete Notes

Complete Wireless Sensor Networks notes.

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Important Questions

Most expected RGPV examination questions.

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PYQ Analysis

Previous-year question analysis and unit weightage.

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Frequently Asked Questions

A Wireless Sensor Network is a collection of distributed sensor nodes that sense conditions, process data and communicate wirelessly.
Sensor nodes usually operate on limited battery power and may be deployed where battery replacement is difficult, so energy-efficient protocols are essential.
Unit II mainly covers MAC protocols, routing challenges and different data-dissemination protocols used in WSN.
Node localization is the process of estimating or determining the geographical position of a sensor node.
IEEE 802.15.4 defines low-rate wireless personal-area-network specifications commonly used as a foundation for low-power sensor-network technologies such as ZigBee.
Major challenges include limited resources, wireless communication, unattended deployment, physical capture of nodes and distributed operation.

Related Study Pages

IT VI Semester Subjects Software Engineering Computer Networks