Fundamental Implications for Location Accuracy in Ultra-Dense 5G Cellular Networks
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Authors
Roth, John D.
Tummala, Murali
McEachen, John C.
Subjects
Cellular radio
Millimeter Wave Communication
Radio Position Measurement
Road vehicle location monitoring
Millimeter Wave Communication
Radio Position Measurement
Road vehicle location monitoring
Advisors
Date of Issue
2018-12-24
Date
24 December 2018
Publisher
IEEE
Language
Abstract
At the threshold of 5G, much is promised based on the predicate of hyper-accurate location-aware communications. Although the unique spectral real estate associated with 5G implies the possibility of such a persistent localization scheme, we submit that precision range-based localization is not a generational inevitability but rather achievable only under the correct architectural philosophy. To show this, we consider a fundamental component that limits or enables any positioning system: the underlying infrastructure geometry. The significance of this research follows from several significant results. First, cell ultra densification, although the primary catalyst of Long Term Evolution (LTE)/LTE-Advanced capacity improvement and a major disruptive technology in 5G networks, will not alone provide for more accurate user positioning. To show this, we derive a closed-form solution to the Cramor-Rao lower bound specific to 5G networks given that infrastructure is distributed via the Poisson point process (PPP). This result is used to justify a positioning-services architecture that fundamentally embraces a variable number of supporting access points. In fact, we show that without this architecture, a foundational decline in positioning performance may inadvertently be realized. Finally, by numerically comparing our results with other point processes common in cellular network modeling, we present justification for the PPP as an appropriate model for analyzing positioning performance in ultra dense 5G infrastructures.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1109/TVT.2018.2885413
Published in: IEEE Transactions on Vehicular Technology (Early Access)
Published in: IEEE Transactions on Vehicular Technology (Early Access)
Series/Report No
Department
Electrical and Computer Engineering (ECE)
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
13 p.
Citation
Roth, John, Murali Tummala, and John McEachen. "Fundamental Implications for Location Accuracy in Ultra-Dense 5G Cellular Networks." IEEE Transactions on Vehicular Technology (2018).
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.