Prediction-Based Energy Saving Mechanism in 3GPP NB-IoT Networks

Abstract

The current expansion of the Internet of things (IoT) demands improved communication platforms that support a wide area with low energy consumption. The 3rd Generation Partnership Project introduced narrowband IoT (NB-IoT) as IoT communication solutions. NB-IoT devices should be available for over 10 years without requiring a battery replacement. Thus, a low energy consumption is essential for the successful deployment of this technology. Given that a high amount of energy is consumed for radio transmission by the power amplifier, reducing the uplink transmission time is key to ensure a long lifespan of an IoT device. In this paper, we propose a prediction-based energy saving mechanism (PBESM) that is focused on enhanced uplink transmission. The mechanism consists of two parts: first, the network architecture that predicts the uplink packet occurrence through a deep packet inspection; second, an algorithm that predicts the processing delay and pre-assigns radio resources to enhance the scheduling request procedure. In this way, our mechanism reduces the number of random accesses and the energy consumed by radio transmission. Simulation results showed that the energy consumption using the proposed PBESM is reduced by up to 34% in comparison with that in the conventional NB-IoT method.

Energy‐Efficient Uplink Resource Units Scheduling for Ultra‐Reliable Communications in NB‐IoT Networks

“…However, the QoS satisfaction and the transmission reliability are ignored in this paper. In [18], the authors develop a prediction method to allocate resource in advance based on the occurrence and delay time of uplink transmission. Although it can accelerate the transmission procedure, it may decrease the scheduling flexibility and resource efficiency.…”

IoT Connectivity Technologies and Applications: A Survey

“…[122], [123]. NB-IoT also uses OFDMA with 15kHz subcarrier spacing in the downlink and SC-FDMA with both 15kHz and 3.75kHz subcarrier spacings in the uplink [124]. Different from LTE-M, both single-tone and multi-tone SC-FDMA can be used for NB-IoT [14] but only half-duplex operations are supported by NB-IoT.…”

“…In-band, standalone, and guard-band deployment of the NB-IoT in an LTE component carrier with 20MHz bandwidth[124].…”

Extreme Coverage in 5G Narrowband IoT: A LUT-Based Strategy to Optimize Shared Channels

“…Low power wireless technologies have the potential to connect 60% of the devices to the Internet [3], alleviating the need for further costs in standard network infrastructure. These technologies, known as low power wide area network (LPWAN), are designed according to the following principles: communication distance up to 40 km, thousands of devices supported by each base station (BS), availability for over a decade without battery replacement, and module price below U$D 5 [4].…”

“…Moreover, 3GPP recognizes the importance of this technology describing the open issues to be addressed during the future 5G standardization process [7]. To address these points, continuously growing efforts were made, mainly over the last two years: radio resource optimization of physical channels such as NPRACH [8,9], energy efficient uplink scheduling schemes [4,10], among others.…”