IoT Protocol Stack and Architecture

Questions and Answers

What is the primary limitation of the IEEE 802.15.4 protocol for IoT applications?

Incompatibility with IPv6

High power consumption

Limited scalability for a large number of devices (correct)

Excessive latency in communication

What was the purpose of the IEEE 802.11ah task group?

To develop a standard for large-scale IoT systems (correct)

To create a protocol for high-speed data transfer

To reduce power consumption in existing protocols

To enhance security features for Wi-Fi networks

What characteristic distinguishes 6LoWPAN from traditional IPv6 protocols?

Fixed packet size limitation

Requirement for physical layer compatibility

Support for high bandwidth devices

Implementation of header compression (correct)

Which of the following is NOT a feature of WPAN devices that 6LoWPAN must accommodate?

High data throughput Signup and view all the answers

What standard does 6LoWPAN originally support for IoT communication with regard to WPAN devices?

802.15.4 Signup and view all the answers

Which of the following is not one of the three types of IoT protocols?

Communication Protocols Signup and view all the answers

Which layer of the IoT protocol stack is responsible for processing, storage, and analysis of data?

Application layer Signup and view all the answers

What is the primary role of the Electronic Product Code (EPC) number in IoT systems?

To assist in object identification and tracking Signup and view all the answers

Which of the following protocols was developed by Sigma Designs and improved by Z-Wave Alliance?

Z-Wave Signup and view all the answers

What standard does IEEE 802.15.4 provide functionalities for in low-power wireless networks?

Physical and MAC layers Signup and view all the answers

Study Notes

IoT Protocol Categories and Architecture

IoT systems are composed of hardware and software components for data processing, storage, and analysis from smart devices.
A five-layer architecture includes: Business layer, Application layer, Service Management layer, Object Abstraction layer, and Object layer.

IoT Protocol Types

IoT protocols are vital for applications and services, proposed by various organizations such as IEEE, IETF, W3C, ETSI, and EPCglobal.
Protocols are categorized into three main types:
- Infrastructure Protocols
- Service Discovery Protocols
- Application Protocols

RFID and Electronic Product Code (EPC)

RFID tag readers transmit unique tag numbers to object-name service applications for information retrieval from databases.
The unique identifier on RFID tags is known as the Electronic Product Code (EPC), essential for tracking smart items.
EPCglobal oversees the development and management of EPC and RFID standards.

Z-Wave Communication Protocol

Z-Wave is a low-power communication protocol designed for short-range (up to 30m) point-to-point communication.
Developed by Sigma Designs and enhanced by Z-Wave Alliance, it is widely used in home automation and smart devices.

IEEE 802.15.4 Standard

IEEE 802.15.4 defines Physical and MAC layer functionalities for Low-Rate Wireless Personal Area Networks (LR-WPAN).
It ensures reliable, high data rate communication with low power consumption, making it suitable for numerous IoT applications.
While effective for small networks, it struggles with larger device deployments over extensive areas.

IEEE 802.11ah Task Group

To address limitations of IEEE 802.15.4 in large-scale IoT networks, IEEE 802.11 initiated Task Group 802.11ah.
This new standard combines advantages of IEEE 802.11 and low-power sensor communication technologies for large area networks.

6LoWPAN Protocol

6LoWPAN is an open standard developed by IETF for IoT communications, enabling connectivity with 802.15.4 devices and now supporting multiple WPAN types (BLE, low-power RF, and low-power Wi-Fi).
Unique characteristics of WPAN devices present challenges such as variable address lengths and limited packet sizes, necessitating an adaptation layer for IPv6 compliance.
6LoWPAN addresses these issues through header compression, ensuring efficient communication in constrained environments.

Description

Explore the mapping of IoT protocol categories to the five-layer architecture, which includes Business, Application, Service Management, Object Abstraction, and Object layers. Understand how these protocols facilitate the functioning of IoT systems that process, store, and analyze data from smart devices.