Development of the measurement method for challenging NLOS conditions in mobile networks

IEEE Trans. Instrum. Meas.

Erkkila

Tervonen

et al. 2018

Self Cite

This article has two main objectives. First, it describes the practical challenges of field trials and proposes a developed test method. Secondly, the test method is used to compare uplink performance with different antenna technologies when user equipment does not have a line of sight to the evolved Node B. Both passive and active antenna configurations were used in the performance evaluation. Modern cellular networks have high demands for capacity, reliability, and availability. The verification of a network's configuration and technological features is essential to guarantee network performance, and the performance of a network must be verified by laboratory testing or field trials; such trials produce experimental knowledge of technology features and configurations. Technological and environmental factors must also be considered before performing mobile network field-testing. Our work showed that moving user equipment produces more reliable and repeatable results than measurements with stationary user equipment. Our antenna configuration comparison study revealed that in the uplink direction, active antenna system beam control could significantly increase the uplink capacity in non-line-of-sight conditions. Index Terms-2-and 4-way RX diversity, AAS, field trial, horizontal beamforming, non-line-of-sight environment, MIMO, uplink capacity improvement, vertical beamforming.

Section: Comparison Of the Measurement Methods Optionsmentioning

confidence: 99%

Section: Networkmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Field Measurement for Antenna Configuration Comparison in Challenging NLOS Locations

IEEE Trans. Instrum. Meas.

Erkkila

Tervonen

et al. 2018

Self Cite

“…Garc et al [8] introduced antenna array measurements in near field with UAS. Heikkilä et al [9] presents study of the usage of UASs for site survey and antenna pattern measurements in-situ in mobile networks. These references showed the usability of UAS in the site survey measurements.…”

Section: Related Workmentioning

confidence: 99%

The Use of Unmanned Aircraft System for the Radio Frequency Interference Measurements

2019 IEEE International Symposium on Measurements &Amp; Networking (M&N)

Seppanen

Koskela

et al. 2019

Self Cite

The unmanned aircraft systems (UAS) are commonly used for aerial photography, express delivery for packets or video monitoring. The UAS technology can help responding to the growing demands of the frequency monitoring by national radiocommunication authorities (NRAs). This article presents a practical usage trial of an unmanned aircraft for monitoring the spectrum usage and finding the interference location. The monitoring of spectrum usage is one part of the NRAs' process for guarantee user compliance with radio license conditions. Finding illegal or malfunctioning transmitters is a challenging task especially in urban environment, due to multi-path propagation conditions. This study focuses on practical assessment of the method for determining accurate location of radio frequency interference sources from the buildings using the UAS technology. The practicability of the UAS technology usage in spectrum monitoring activities was under the evaluation. This study showed promising results that UAS with the measurement equipment setup suits NRAs' as a tool for mobile monitoring on the air.

“…The effective use of dynamic modulation and a coding scheme results in high data rates and capacity when the UE is located near the eNB. To enhance communication performance via the use of spatial diversity and spatial multiplexing in data transmission, the Multiple-Input Multiple-Output (MIMO) radio technology, which utilizes multiple antennas at both the transmitter and receiver, is used [13]. This technology has an impact on the RSRP pattern because the RSRP and Signal to Noise Ratio are proportional to each other on average.…”

Section: Key Performance Indicators In Ltementioning

confidence: 99%

Using Unmanned Aircraft Systems for Mobile Network Verifications

2018 IEEE 29th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)

Koskela

Kippola

et al. 2018

Self Cite

This study presents the usage of unmanned aircraft for site survey and antenna pattern measurements in-situ in mobile networks. The site survey is one part of the verification and optimization process of the network operator. Mobile network operators' responsibility is to ensure the broadly available, reliable network series that are essential for customer experience. Technically that means mobile network coverage of the desired area without holes and with good capacity. The operator performs network planning in order to optimize coverage and capacity. It is essential to know the antenna pattern to plan and design an effective and efficient mobile network. Antenna manufacturers provide antenna radiation patterns measured in the standard anechoic chamber. Understanding how real site implementation differs from the laboratory measurements is also crucial. This study focuses on developing in-situ antenna measurements for the antenna patterns recorded in the laboratory. The evaluation of antenna radiation patterns in a real environment will provide additional information about what kind of effect the antenna site mast, installation, and antenna performance parameters will have on the theoretical radiation pattern.