Theatre

Adopting an Energy-Saving Mindset for IoT World

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22:30

EOC 2023

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Hatim Jamali

Hatim Jamali is an Embedded IoT Engineer at 1NCE, a global IoT connectivity and software company that was recently named to Fast Company’s Next Big Things in Tech list. He designs, develops, implements, and tests embedded systems that enable devices to connect to the cloud and transmit data over cellular networks in more than 150 countries. He has 3 years of experience in hardware and software development, wireless communication protocols, and cloud computing platforms. Furthermore, he is the founder of Morocco IoT and AI Challenge and a member of IEEE "The Institute of Electrical and Electronics Engineers"

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IoT Low Power Connectivity Open Source

Theatre

Adopting an Energy-Saving Mindset for IoT World

Hatim Jamali

22:30 EOC 2023

Hatim Jamali

22:30

In the world of IoT, energy efficiency is a critical factor that determines the success of a device. With the increasing number of IoT devices, it is important to choose the right generation of mobile communication technology that can support the device's requirements while maximizing energy efficiency.

In this presentation, we will explore the different generations of mobile communication technology and the protocols that are available for IoT devices. We will examine the pros and cons of each technology and highlight the key features that make them suitable for different types of IoT applications.

We will also discuss the optimal way to send messages in an energy-efficient manner, taking into account factors such as data rate, latency, and power consumption. By choosing the right combination of technology and protocol, IoT devices can achieve optimal energy efficiency and reliable communication.

The goal of this presentation is to educate IoT developers and decision-makers on the best practices for choosing the right generation of mobile communication and sending messages in an energy-efficient manner. By doing so, they can ensure that their IoT devices are reliable, cost-effective, and sustainable.

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What main technical reason did the speaker give for CoAP often consuming less energy than MQTT on constrained IoT devices?

A CoAP uses UDP and its shorter transmissions (non-confirmable mode) avoid waiting for TCP acknowledgements, reducing on-air time.

B CoAP forces devices into a hardware sleep mode after each packet, which MQTT does not support.

C CoAP automatically compresses payloads on the device, while MQTT always sends uncompressed data.

D CoAP uses stronger encryption that speeds up transmission, lowering energy use compared to MQTT.

E CoAP operates on a separate ultra-low-power radio band that is unavailable to MQTT.

What is the key practical benefit of using the Binary Conversion Language on-device, according to the talk?

A It compresses binary payloads on the device and uses a JSON schema at the endpoint to decompress, significantly reducing payload size and energy consumption.

B It encrypts device data so that the network operator can deduplicate packets and save bandwidth.

C It replaces MQTT and CoAP entirely, providing a new transport protocol optimized for low power.

D It converts binary to verbose JSON on the device so cloud services receive human-readable data directly.

E It allows the device to offload decoding to nearby gateways, increasing on-device processing to save transmission time.

When selecting a cellular network for an energy-constrained IoT application, what practical guidance did the speaker emphasize about NB‑IoT versus LTE‑M (Cat‑M1)?

A NB‑IoT is generally more power-efficient and offers deeper penetration, so it is preferable for low data-rate, deep-coverage use cases like smart metering; choice depends on application requirements.

B LTE‑M is always the best choice for battery life, so NB‑IoT should be avoided for energy-constrained devices.

C NB‑IoT is only suitable for short-range local networks and cannot be used for wide-area deployments.

D NB‑IoT is optimized for very high data rates, so it should be chosen when frequent large payloads are needed.

E The speaker recommended choosing the newest available technology without evaluating data rate or coverage needs, since newer always means more efficient.

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Nathan3

Score: 1 | 3 years ago | 1 reply

Thanks for the talk. Is there anything that prevent the use of COAP over TCP ? In this case would we get the same power consumption (or more?) than MQTT ? I am hearing more and more about LwM2M these last few months: do you have any experience on it and how it compared with COAP and MQTT ?

JamaliSpeaker

Score: 0 | 3 years ago | no reply

While COAP can technically be used over TCP, it is not recommended (because it defeats the purpose of using a lightweight protocol) due to the added overhead and increased power consumption. TCP is a heavier protocol compared to UDP, which is the protocol COAP is designed to run on, and this additional overhead can lead to higher power consumption.
For the second part of the question, LwM2M is built on top of COAP and provides a standardized way of managing IoT devices and applications. It is designed to minimize network traffic and power consumption.
Generally, LwM2M is specifically designed for IoT device management, while COAP and MQTT are more general-purpose protocols that can be used for data transfer and communication.

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