Intelligent surfaces signal better coverage

November 11, 2020

by King Abdullah College of Science

Intelligent surfaces signal better coverage

Reconfigurable intelligent surfaces (RISs) on structures could considerably improve communication network coverage. The RIS system could eliminate blind spots by redirecting signals that will well be blocked by structures. Credit: KAUST, Mustafa Kishk & Maha M. Kamal

A mathematical model shows specialized reflective panels might be deployed on the massive to boost communication systems in cities.

Specialized reflective panels located on the top of structures and deployed broadly across a town could considerably improve network coverage, shows a KAUST modeling study.

Next-generation cellular systems (5G and beyond) will give you communication coverage to wider rural areas, while improving data forex rates to satisfy quickly rising demand. In cities particularly, obstacles by means of structures along with other structures can hamper wireless communication links, reducing mobile phone signals and slowing data exchange.

Studies have proven that reconfigurable intelligent surfaces (RISs) hold great promise like a technology for eliminating communication “blind spots” brought on by blockages. RISs are specifically designed surfaces comprising multiple reflective factors that can adjust and redirect incoming signals, permitting better control and gratifaction over a whole communication network. RISs could be opaque or transparent, and they’re well-established when it comes to their energy effectiveness and efficiency at manipulating signals. An RIS system may use both localization and beam tracking technologies to pinpoint a user’s location and also to follow their device—even if they’re relocating a vehicle at high-speed.

A communication scenario in a major city prior to the deployment of RISs that shows how one user doesn’t have a type of sight using the base station. Credit: KAUST Mustafa Kishk & Maha M. Kamal

“The RIS system and exactly how it reflects signals continues to be completely studied within the literature, resulting in various helpful mathematical models,” explains postdoc Mustafa Kishk, who conducted the research together with his consultant Mohamed-Slim Alouini. “We used one of these simple well-established models for RIS behavior within our system setup. Then, utilizing a mathematical tool known as stochastic geometry, we produced a sizable-scale system that distributes RISs randomly around the faces of structures. Then we examined the probable coverage gains under different scenarios.”

The outcomes show RISs can dramatically improve coverage in areas with blind spots. In a density of 300 blockages per square kilometer, they discovered that only six RISs could be needed per kilometer to considerably enhance coverage. However, when the blockage density increases to 700 per kilometer, the machine becomes inherently much more complex, as well as an believed 490 RISs per kilometer could be needed.

“A fascinating question still to become clarified is whether or not there’s the best possible quantity of RISs that may be deployed in almost any an area prior to beginning to hinder each other,” states Kishk.

“Our model may be used to anticipate the performance associated with a given large-scale network,” adds Alouini. “We feel it’ll provide accurate, rapid assessments of potential real-world RIS applications. We’re able to see RISs deployed in 6G systems, possibly inside a decade.”

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More details:

Exploiting At random-located Blockages for big-Scale Deployment of Intelligent Surfaces. arXiv:2001.10766 [cs.IT]

Mustafa A. Kishk et al, Exploiting At random-located Blockages for big-Scale Deployment of Intelligent Surfaces, IEEE Journal on Selected Areas in Communications (2020). DOI: 10.1109/JSAC.2020.3018808


Intelligent surfaces signal better coverage (2020, November 11)

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