Optimized LTE Data Transmission Procedures for IoT: Device Side Energy Consumption Analysis

摘要

The efficient deployment of Internet of Things (IoT) over cellular networks,such as Long Term Evolution (LTE) or the next generation 5G, entails severalchallenges. For massive IoT, reducing the energy consumption on the device sidebecomes essential. One of the main characteristics of massive IoT is small datatransmissions. To improve the support of them, the 3GPP has included two noveloptimizations in LTE: one of them based on the Control Plane (CP), and theother on the User Plane (UP). In this paper, we analyze the average energyconsumption per data packet using these two optimizations compared toconventional LTE Service Request procedure. We propose an analytical model tocalculate the energy consumption for each procedure based on a Markov chain. Inthe considered scenario, for large and small Inter-Arrival Times (IATs), theresults of the three procedures are similar. While for medium IATs CP reducesthe energy consumption per packet up to 87% due to its connection releaseoptimization.