Spatio-Temporal Impact of Hand and Body Blockage for Millimeter-Wave User Equipment Design at 28 GHz
| Autor: | Joakim Hulten, Vasanthan Raghavan, Koymen Ozge, Ashwin Sampath, Junyi Li, Vladimir Podshivalov, M. Ali Tassoudji |
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| Rok vydání: | 2018 |
| Předmět: |
Computer Networks and Communications
Computer science 3rd Generation Partnership Project 2 020208 electrical & electronic engineering 020206 networking & telecommunications 02 engineering and technology Computer Science Applications Base station User equipment Extremely high frequency 0202 electrical engineering electronic engineering information engineering Point (geometry) Enhanced Data Rates for GSM Evolution Electrical and Electronic Engineering Simulation 5G |
| Zdroj: | IEEE Communications Magazine. 56:46-52 |
| ISSN: | 1558-1896 0163-6804 |
| Popis: | The recently proposed channel model by the Third Generation Partnership Project for fifth generation New Radio (5G-NR) systems at millimeter- wave carrier frequencies in TR38.901 provides a good starting point for understanding the impact of propagation, material penetration, and blockage in cellular access systems. With this backdrop, the focus of this article is on hand and body blockage which have a significant bearing on user equipment (UE) design and in the practical viability of millimeter-wave systems. Building on TR38.901, we first study hand and body blockage loss with experiments using a 28 GHz experimental prototype that emulates a 5G base station and a form-factor UE. These measurement estimates show that while blockage losses can be substantial, they are significantly lower than the agreed model in TR38.901. We then study the implications of these revised estimates on spherical coverage with the UE. For this, we consider two form-factor UE designs: a face design and an edge design. Our studies show that while both designs are generally comparable in terms of spherical coverage, practical design considerations favor the edge design over the face design. We finally report on the timescales at which blockage events occur and show that given the symbol periods in 5G-NR, it is possible to implement mitigation strategies to overcome blockage (e.g., switch beams at the UE from a blocked path to an unblocked path). |
| Databáze: | OpenAIRE |
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