Abstract
The indoor application of wave propagation in the 5G network is essential to fulfill the increasing demands of network access in an indoor environment. This study investigated the wave propagation properties of line-of-sight (LOS) links at two long corridors of Chosun University (CU). We chose wave propagation measurements at 3.7 and 28 GHz, since 3.7 GHz is the closest to the roll-out frequency band of 3.5 GHz in South Korea and 28 GHz is next allocated frequency band for Korean telcos. In addition, 28 GHz is the promising millimeter band adopted by the Federal Communications Commission (FCC) for the 5G network. Thus, the 5G network can use 3.7 and 28 GHz frequencies to achieve the spectrum required for its roll-out frequency band. The results observed were applied to simulate the path loss of the LOS links at extended indoor corridor environments. The minimum mean square error (MMSE) approach was used to evaluate the distance and frequency-dependent optimized coefficients of the close-in (CI) model with a frequency-weighted path loss exponent (CIF), floating-intercept (FI), and alpha–beta–gamma (ABG) models. The outcome shows that the large-scale FI and CI models fitted the measured results at 3.7 and 28 GHz.
Highlights
By 2023, there will be over three times as many devices linked to the Internet protocol network than there will be human beings [1]
A large part of all the enhanced mobile broadband (eMBB) services will be for the indoor environment, where people stay for different activities such as studying, working, living, leisure, or healing purposes
The measured data pattern for the two extended corridors demonstrate that the environment impacts the path loss
Summary
By 2023, there will be over three times as many devices linked to the Internet protocol network than there will be human beings [1]. Humans will use many devices to access multimedia content, services, and data [2] through wireless networks. One of the most effective decisions to facilitate enhanced mobile broadband (eMBB) services to these huge devices is to relocate data transmissions into an under-utilized nontraditional range, where huge bandwidths are available [3]. With the large bandwidth within the mmWave spectrum, a significant component of the 5G mobile network, the mmWave was proposed to enable multi-gigabit telecommunication, visual services, for example, ultra-high-definition video and highdefinition television [6,7,8,9] and multi-gigabit communication, such as device-to-device communication [7,10,11]
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