Energy Efficient Access Point Placement for Distributed Massive MIMO

Zhu, Yi-Hang and Callebaut, Gilles and Çalık, Hatice and Van der Perre, Liesbet and Rottenberg, François (2022) Energy Efficient Access Point Placement for Distributed Massive MIMO. Network, 2 (2). pp. 288-310. ISSN 2673-8732

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Distributed massive multiple-input multiple-output (D-mMIMO) is one of the key candidate technologies for future wireless networks. A D-mMIMO system has multiple, geographically distributed, access points (APs) jointly serving its users. First of all, this paper reports on where to position these APs to minimize the overall transmit power in actual deployments. As a second contribution, we show that it is essential to take into account both the radiation pattern of the antenna array and the environment information when optimizing AP placement. Neglecting the radiation pattern and environment information, as generally assumed in the literature, can lead to a power penalty in the order of 15 d
and 20 d
, respectively. These results have been obtained by formulating the AP placement optimization problem as a combinatorial optimization problem, which can be solved with different approaches where different channel models are applied. The proposed graph-based channel model drastically lowers the computational time with respect to using an ray-tracing simulator (RTS) for channel evaluation. The performance of the graph-based approach is validated via the RTS, showing that it achieves 5 d
power saving on average compared with a Euclidean distance-based approach, which is the most commonly used approach in the literature.

Item Type: Article
Subjects: Eprint Open STM Press > Computer Science
Depositing User: Unnamed user with email
Date Deposited: 12 Jun 2023 07:07
Last Modified: 19 Jan 2024 11:31

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