7 research outputs found
UAV-Aided Interference Assessment for Private 5G NR Deployments: Challenges and Solutions
Industrial automation has created a high demand for private 5G networks, the
deployment of which calls for an efficient and reliable solution to ensure
strict compliance with the regulatory emission limits. While traditional
methods for measuring outdoor interference include collecting real-world data
by walking or driving, the use of unmanned aerial vehicles (UAVs) offers an
attractive alternative due to their flexible mobility and adaptive altitude. As
UAVs perform measurements quickly and semiautomatically, they can potentially
assist in near realtime adjustments of the network configuration and
fine-tuning its parameters, such as antenna settings and transmit power, as
well as help improve indoor connectivity while respecting outdoor emission
constraints. This article offers a firsthand tutorial on using aerial 5G
emission assessment for interference management in nonpublic networks (NPNs) by
reviewing the key challenges of UAV-mounted radio-scanner measurements.
Particularly, we (i) outline the challenges of practical assessment of the
outdoor interference originating from a local indoor 5G network while
discussing regulatory and other related constraints and (ii) address practical
methods and tools while summarizing the recent results of our measurement
campaign. The reported proof of concept confirms that UAV-based systems
represent a promising tool for capturing outdoor interference from private 5G
systems.Comment: 7 pages, 4 figure
5G-SMART D1.5 Evaluation of radio network deployment options
This deliverable results from the work on the radio network performance
analysis of the identified use cases and deployment options. Covered topics
include latency reduction and mobility features of the 5G NR itself, as well as
detailed analysis of the radio network KPIs, such as latency, reliability,
throughput, spectral efficiency and capacity. Corresponding trade-offs for the
identified deployment options and industrial use cases are quantified with an
extensive set of technical results. Also, this deliverable is looking into
co-channel coexistence performance analyzed through a real-life measurement
campaign and considers performance optimization in presence of a special
micro-exclusion zone within a factory.Comment: Deliverable D1.5 of the project 5G For Smart Manufacturing (5G-SMART
Advanced performance monitoring for self-healing cellular mobile networks
This dissertation is devoted to development and validation of advanced per-
formance monitoring system for existing and future cellular mobile networks.
Knowledge mining techniques are employed for analysis of user specific logs,
collected with Minimization of Drive Tests (MDT) functionality. Ever increas-
ing quality requirements, expansion of the mobile networks and their extend-
ing heterogeneity, call for effective automatic means of performance monitoring.
Nowadays, network operation is mostly controlled manually through aggregated
key performance indicators and statistical profiles. These methods are are not
able to fully address the dynamism and complexity of modern mobile networks.
Self-organizing networks introduce automation to the most important network
functions, but the opportunity of processing large arrays of user reported perfor-
mance data is underutilized.
Advanced performance monitoring system developed in the presented re-
search considers both numerical and sequential properties of the MDT data for
detection of faults. Network malfunctions analyzed in this study are sleeping
cells in either physical or medium access layer. A full data mining cycle is em-
ployed for identification of problematic regions in the network. Pre-processing
with statistical normalization and sliding window methods, both linear and non-
linear transformation and dimensionality reduction algorithms, together with
clustering and classification methods are used in the discussed research. Sev-
eral post-processing and detection quality evaluation methods are proposed and
applied. The developed system is capable of fast and accurate detection of non-
trivial network dysfunctions and is suitable for future mobile networks, even in
combination with cognitive self-healing. As a result, operation of modern mo-
bile networks would become more robust, increasing quality of service and user
experience
An approach for network outage detection from drive-testing databases
A data-mining framework for analyzing a cellular network drive testing database is described in this paper. The presented method
is designed to detect sleeping base stations, network outage, and change of the dominance areas in a cognitive and self-organizing
manner. The essence of the method is to find similarities between periodical network measurements and previously known outage
data. For this purpose, diffusion maps dimensionality reduction and nearest neighbor data classification methods are utilized. The
method is cognitive because it requires training data for the outage detection. In addition, the method is autonomous because
it uses minimization of drive testing (MDT) functionality to gather the training and testing data. Motivation of classifying MDT
measurement reports to periodical, handover, and outage categories is to detect areas where periodical reports start to become
similar to the outage samples. Moreover, these areas are associated with estimated dominance areas to detected sleeping base
stations. In the studied verification case, measurement classification results in an increase of the amount of samples which can be
used for detection of performance degradations, and consequently, makes the outage detection faster and more reliable.peerReviewe