Indoor Coexistence Analysis Among 5G New Radio, LTE-A and NB-IoT in the 700 MHz Band

Abstract

This work reports a common indoor experimental coexistence performance analysis among 5G New Radio (5G NR), 4G Long Term Evolution Advanced Pro (LTE-A Pro) and Narrowband Internet of Things (NB-IoT), using co-channel and adjacent channels in the 700 MHz Band. The required frequency offset for the 4G and 5G generations simultaneous operation has been evaluated, as a function of the modulation scheme in order to minimize the adjacent channel interference. A suitable management of the numerology and allocating time-frequency resources, configuring CORESET, enables a peaceful coexistence, as well as high performance for all evaluated systems. Experimental results demonstrate an efficient spectrum sharing of 10 MHz-bandwidth for a 5G NR, an LTE-A Pro and three NB-IoT downlink carriers, aiming to take advantage of 700 MHz propagation aspects for the current 4G and future 5G. Constellation and error vector magnitude (EVMRMS) in accordance to the 3GPP requirements reinforce the successful 4G and 5G spectrum refarming implementation.

A microdosimetric study at the cellular and intracellular level using a 3D realistic cell model

“…The interaction of EMFs with cells is evaluated in terms of volumetric power loss density (VPLD) in all the internal compartments of the cell, at 700 MHz, 3.7 GHz, and 60 GHz [16][17][18][19][20], above the β-relaxation. In Fig.…”

“…The aim of this study is to give a quantitative estimation of the EM quantities induced by the exposure of MSC cells to the EMFs (1 kHz -100 GHz), specifically focusing on the exposure results at: (i) 700 MHz, representative of 4G Long Term Evolution (LTE), Narrowband IoT (NB-IoT) and low band of Frequency Range 1 (FR1) of 5G technologies; (ii) 3.7 GHz, representative of the mid-band FR1 of 5G technologies (5G NR n78 band); (iii) 60 GHz, already deployed in some countries for WiGig and 5G [16][17][18][19][20].…”

A Survey on LPWAN-5G Integration: Main Challenges and Potential Solutions

“…The options of the integration of LPWAN and Low Rate-Wireless Personal Area Networks (LR-WPAN) are investigated in [135], and two technologies: NB-IoT and IEEE 802.15.4.g, are selected to implement the integration. The authors in [136] analyze the coexistence of 5G NR, LTE-A and NB-IoT in the 700MHz band by an indoor experiment, showing an efficient spectrum sharing for the three wireless technologies.…”

A Novel Interference Avoidance Based on a Distributed Deep Learning Model for 5G-Enabled IoT

“…Decreasing the interference in IoT communication and 5G is an important issue that should be tackled, as it directly affects the system performance. In the literature, considerable research effort and solutions have been dedicated for the minimization of interference among devices in IoT-based networks such as optimization [ 9 , 10 , 11 , 12 , 13 , 14 ], deep learning [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ], modulation [ 23 , 24 ] and the Nash nocoopertaive power game [ 25 ].…”

“…Other approaches have been adopted, such as in [ 23 ], where a modulation scheme was used for 4G and 5G to obtain the required frequency offset to ensure their coexistence with minimal interference among adjacent channels. In addition, in [ 24 ], a multiplexing technique was presented for D2D communication to enhance resource utilization and minimize interference of the D2D users with the cellular users.…”