Reconfigurable Intelligent Surface-Aided Indoor Communication With Neural Beam Alignment

Xiao, Chaokun; Huo, Haomiao; Xu, Wei; Sun, Huan; Shu, Chunjie

doi:10.1109/iccc52777.2021.9580332

Cited by 3 publications

(1 citation statement)

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“…Specifically, an IRS can reflect the incident signals so they are added constructively in the desired direction to increase the signal power (so-called passive beamforming) or destructively for mitigating undesired interference, either for high data rate, dependable, secure, NLOS, or widecoverage communications, and RF-WET (including joint communication and RF-WET). Conventional IRSs, so-called passive IRSs, e.g., [183]- [187], [190]- [193], [195]- [201], are composed of fully passive reflecting elements and the only active EC comes from the controlling HW (IRS controller and related active circuitry). This allows low-power/cost energy-efficient im-plementations that do not incorporate additional RF radiation into the environment, which is undoubtedly appealing in terms of sustainability.…”

Section: ) Irsmentioning

confidence: 99%

Energy-Sustainable IoT Connectivity: Vision, Technological Enablers, Challenges, and Future Directions

López,

Rosabal,

Ruiz-Guirola

et al. 2023

IEEE Open J. Commun. Soc.

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Technology solutions must effectively balance economic growth, social equity, and environmental integrity to achieve a sustainable society. Notably, although the Internet of Things (IoT) paradigm constitutes a key sustainability enabler, critical issues such as the increasing maintenance operations, energy consumption, and manufacturing/disposal of IoT devices have long-term negative economic, societal, and environmental impacts and must be efficiently addressed. This calls for self-sustainable IoT ecosystems requiring minimal external resources and intervention, effectively utilizing renewable energy sources, and recycling materials whenever possible, thus encompassing energy sustainability. In this work, we focus on energy-sustainable IoT during the operation phase, although our discussions sometimes extend to other sustainability aspects and IoT lifecycle phases. Specifically, we provide a fresh look at energysustainable IoT and identify energy provision, transfer, and energy efficiency as the three main energyrelated processes whose harmonious coexistence pushes toward realizing self-sustainable IoT systems. Their main related technologies, recent advances, challenges, and research directions are also discussed. Moreover, we overview relevant performance metrics to assess the energy-sustainability potential of a certain technique, technology, device, or network, together with target values for the next generation of wireless systems, and discuss protocol, integration, and implementation issues. Overall, this paper offers insights that are valuable for advancing sustainability goals for present and future generations.

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