EDT+: Energy Consumption Optimization of NB-IoT.pptx

Narrowband Internet of Things (NB-IoT) is a popular communication standard used to construct IoT applications. To optimise
energy consumption of NB-IoT, Early Data Transmission (EDT) is
included within the standard. In this work we propose and describe
Improved Early Data Transmission (EDT+) which further reduces
energy consumption. EDT+ takes advantage of the fact that most
sensor nodes are static and do not move when deployed. Thus, the
work required during an NB-IoT wake-up cycle can be significantly
reduced. Our NS3 simulations show that EDT+ reduces communication related energy consumption of a node by at least 20%. Thus,
EDT+ will be useful to facilitate energy harvesting and battery free
deployments.

1. EDT+: Energy Consumption Optimization of NB-IoT Vlad Ionescu, Ian Wassel, Utz Roedig University College Cork, University of Cambridge 11th International Workshop on Energy Harvesting & Energy-Neutral Sensing Systems (ENSsys’ 23) November 12, 2023

2. Introduction Objective: To achieve sustainable IoT deployments with battery-free nodes Focus: Energy optimization in NB-IoT using Improved Early Data Transmission (EDT+)

3. Background NB-IoT: A communication standard for IoT applications Importance: Low power consumption, wide coverage, low cost, high connection density Modes: In-band, Guard-band, Standalone

4. NB-IoT Energy Consumption Challenges: - Control and signaling overheads - Repeated signal transmission - Parameter configuration Goal: Minimize energy consumption to extend device operational life

5. Existing Solutions C-IoT-Opt: Optimizes small data transmissions EDT: Reduces latency and spectral usage Limitations: Need for further optimization in static node scenarios

6. Improved Early Data Transmission (EDT+) Concept: Leverage static nature of sensor nodes Benefits: Reduced communication overhead, enhanced energy savings Simulation Results: At least 20% reduction in communication-related energy consumption

7. EDT+ Overview Process: - Check for EDT+ information on wake-up - Use NPSS and NSSS for synchronization - Fetch MIB and SIB1-NB if necessary - Proceed with data transmission if synchronized

8. Initial Connection and Message Transmission Procedure: - Send Random Access Request (RAR) - BS sends Random Access Response - Include 'EDT+' flag in Connection Request - BS identifies static devices for optimized handling

9. Simulation Setup Tool: NS3 simulation Comparison: EDT vs. EDT+ Metrics: Energy consumption, latency, spectral efficiency

10. Simulation Results Findings: - EDT+ achieves significant energy savings - Reduced latency and spectral usage - Improved performance for static nodes

11. Applications Scenarios: - Smart meters - Structural monitoring - Weather monitoring Advantage: Facilitates energy harvesting and battery-free deployments

12. Conclusion Summary: EDT+ offers a significant improvement over existing methods Future Work: Further enhancements and real-world testing Impact: Facilitates sustainable IoT deployments with reduced energy consumption

13. Questions and Discussion Prompt: Open the floor for questions Encouragement: Engage with the audience for feedback and further discussion