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    Exploiting Randomly Located Blockages for Large-Scale Deployment of Intelligent Surfaces

    Kishk, Mustafa A. and Alouini, Mohamed-Slim (2021) Exploiting Randomly Located Blockages for Large-Scale Deployment of Intelligent Surfaces. IEEE Journal on Selected Areas in Communications, 39 (4). pp. 1043-1056. ISSN 0733-8716

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    One of the promising technologies for the next generation wireless networks is the reconfigurable intelligent surfaces (RISs). This technology provides planar surfaces the capability to manipulate the reflected waves of impinging signals, which leads to a more controllable wireless environment. One potential use case of such technology is providing indirect line-of-sight (LoS) links between mobile users and base stations (BSs) which do not have direct LoS channels. Objects that act as blockages for the communication links, such as buildings or trees, can be equipped with RISs to enhance the coverage probability of the cellular network through providing extra indirect LoS-links. In this article, we use tools from stochastic geometry to study the effect of large-scale deployment of RISs on the performance of cellular networks. In particular, we model the blockages using the line Boolean model. For this setup, we study how equipping a subset of the blockages with RISs will enhance the performance of the cellular network. We first derive the ratio of the blind-spots to the total area. Next, we derive the probability that a typical mobile user associates with a BS using an RIS. Finally, we derive the probability distribution of the path-loss between the typical user and its associated BS. We draw multiple useful system-level insights from the proposed analysis. For instance, we show that deployment of RISs highly improves the coverage regions of the BSs. Furthermore, we show that to ensure that the ratio of blind-spots to the total area is below 10 -5 , the required density of RISs increases from just 6 RISs/km 2 when the density of the blockages is 300 blockage/km 2 to 490 RISs/km 2 when the density of the blockages is 700 blockage/km 2 .

    Item Type: Article
    Keywords: Intelligent surfaces; stochastic geometry; cellular networks;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Hamilton Institute
    Item ID: 16976
    Identification Number:
    Depositing User: Mustafa Kishk
    Date Deposited: 28 Feb 2023 15:48
    Journal or Publication Title: IEEE Journal on Selected Areas in Communications
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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