Planning of Wireless Networks for 5G/6G Applications

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School of Electrical Engineering | Doctoral thesis (article-based) | Defence date: 2024-03-01
Degree programme
107 + app. 69
Aalto University publication series DOCTORAL THESES, 31/2024
The rise of 6G will allow wireless communication networks to achieve unprecedented levels of connectivity, capacity, and coverage. As part of 6G, higher frequency bands such as mmWaves, Terahertz, and visible light can be utilized to provide larger capacity than sub-6 GHz b ands currently used in 4G/5G. However, as frequencies increase, the signal range and obstructions may limit the signal's coverage, creating a significant challenge when it comes to ensuring seamless coverage. Wireless network planning aims to determine the minimum number of wireless access points and their locations in the service areas. Planning is key to achieving seamless coverage, optimizing bandwidth utilization, reducing energy consumption, and ensuring sufficient quality of services. Planning is an NP-hard problem that requires an exhaustive search in order to reach the optimal solution. Due to the large dimensions, parameters, and diverse requirements of networks, it isimpossible to conduct an exhaustive search for network planning. It can, however, be made feasible by developing mathematical tools and optimization models. The purpose of this dissertation is to examine the issue of wireless network planning in light of the different wireless network requirements. Based on Voronoi diagrams and Delaunay triangulation, a regularity algorithm is proposed for planning wireless cellular networks that maximize coverage and balance cell loads outdoors. In addition, we propose a graph that models the indoor areas taking into account the propagation limits imposed by signals at higher frequencies. We then demonstrate that the deployment of access points for seamless Line-of-Sight coverage of indoor areas can be achieved by partitioning this graph into cliques, each representing a wireless access point. As a final step, we use this graph modeling to analyze network requirements to ensure that access points are deployed in a fashion that meets various operational requirements, for example, Line-of-Sight backhauling between access points and multiple Line-of-Sight coverage for positioning.
Supervising professor
Wichman, Risto, Prof., Aalto university, Department of Information and Communications Engineering, Finland
Thesis advisor
Dowhuszko, Alexis Alfredo, Dr., Aalto university, Department of Information and Communications Engineering, Finland
wireless communications, reference node deployment, capacity, coverage
Other note
  • [Publication 1]: Mohsen Abedi and Risto Wichman. Planning and Optimization of Cellular Networks Using Load-based Voronoi Algorithm. In 52nd Asilomar Conference on Signals, Systems, and Compute, Pacific Grove, CA, US, 1589-159, October 2018.
    DOI: 10.1109/ACSSC.2018.8645189 View at publisher
  • [Publication 2]: Mohsen Abedi and Risto Wichman. Cellular Network Planning under Variable QoS Requirements Using Voronoi Algorithm. In IEEE Wireless Communications and Networking Conference, Seoul, South Korea, 1-6, May 2020.
    DOI: 10.1109/WCNC45663.2020.9120591 View at publisher
  • [Publication 3]: Mohsen Abedi and Risto Wichman. Cellular Network Planning via Local Regularity Optimization. In 93rd IEEE Vehicular Technology Conference, Helsinki, Finland, 1-7, April 2021.
    DOI: 10.1109/VTC2021-Spring51267.2021.9448925 View at publisher
  • [Publication 4]: Mohsen Abedi, Alexis Alfredo Dowhuszko and Risto Wichman. Visible Light Communications: A Novel Indoor Network Planning Approach. In IEEE Global Communications Conference, Madrid, Spain, 1-7, December 2021.
    DOI: 10.1109/GLOBECOM46510.2021.9685571 View at publisher
  • [Publication 5]: Mohsen Abedi, Alexis Alfredo Dowhuszko and Risto Wichman. Indoor Planning of Optical Wireless Networks for LoS Condition in Access and Backhauling. Submitted to IEEE Transactions on Communications, September 2023.
  • [Publication 6]: Mohsen Abedi, Alexis Alfredo Dowhuszko and Risto Wichman. Ensuring line-of-sight condition for accurate positioning and sensing over RF/OWC networks. Submitted to IEEE Journal on Selected Areas in Communications, November 2023.