Modelling and Experimental Validation for Battery Lifetime Estimation in NB-IoT and LTE-M

TL;DR

This paper develops and validates a power consumption model for NB-IoT and LTE-M, enabling accurate battery lifetime estimation and demonstrating potential lifetimes up to 10 years under optimal configurations.

Contribution

It introduces a comprehensive energy consumption model based on UE states for NB-IoT and LTE-M, validated through extensive measurements with high accuracy.

Findings

Battery lifetime can reach up to 10 years with proper configuration.

Model accuracy within 5% across various scenarios.

Validated model supports long-term IoT deployment planning.

Abstract

Internet of Things (IoT) is one of the main features in 5G. Low-power wide-area networking (LPWAN) has attracted enormous research interests to enable large scale deployment of IoT, with the design objectives of low cost, wide coverage area, as well as low power consumption. In particular, long battery lifetime is essential since many of the IoT devices will be deployed in hard-to-access locations. Prediction of the battery lifetime depends on the accurate modelling of energy consumption. This paper presents a comprehensive power consumption model for battery lifetime estimation, which is based on User Equipment(UE) states and procedures, for two cellular IoT technologies: Narrowband Internet of Things (NB-IoT) and Long Term Evolution for Machines (LTE-M). A measurement testbed has been setup and the proposed model has been tested and validated via extensive measurements under various traffic patterns and network scenarios, achieving the modelling inaccuracy within5%. The measurement results show that the battery lifetime of an IoT device can reach up to 10 years as required by 3GPP, with proper configuration of the traffic profile, the coverage scenario, as well as the network configuration parameters.