• Table of Contents

Lecture Slides

Lecture5-1-Data Processing-SAX.pptx

Key Characteristics of IoT Devices

• We need to find a way to optimize our bandwidth because inexpensive sensors or actuators are usually equipped with only a radio transceiver for various applications. These typically have low data rates (10-250 kbps), with CCTV and video/sound data requiring higher bandwidth data rates.

Beyond Conventional Sensors

• Human sensors (tweeting real-world data and/or events)
• Software sensors (software agents/services generating/representing data)<

Data Processing in IoT

• IoT data processing requires solutions that are real-time, reliable, efficient (for low-power and resource-limited nodes), and scalable.
• Use cases:
  • Convert billions of smart meter readings to improve power consumption prediction and balancing
  • Monitor patients, provide in-home care, and support various healthcare applications
  • Analyze data from thousands of sensors—including traffic, pollution, weather, congestion, public transport, and events—to enhance traffic management and smart city operations

IoT Data Access

• Data requests for sensory data are usually multi-dimensional, including:
  • Location
  • Type
  • Time
  • One of the above plus a range or a combination of quality of information attributes
  • Complex data type
• For example, a temperature value of 15 degrees becomes more meaningful when described with spatial (e.g., Guildford town centre), temporal (e.g., 09:15 AM GMT, 09-11-2020), and unit (e.g., Celsius) attributes.

In-network processing

• Mobile Ad-hoc Networks vs. Wireless Sensor Networks (WSNs):
  • Mobile Ad-hoc Networks: These networks focus on transmitting data from one point to another, much like a traditional communication network.
  • WSNs: These networks are more sophisticated, providing processed information rather than just raw data. This means they can interpret and analyze data before sending it.
• Key Advantage of WSNs:
  • In-Network Processing: WSNs can manipulate and process data within the network itself, which is a significant advantage over traditional networks.