EMF Exposure Mitigation via MAC Scheduling (2404.06830v2)
Abstract: International standards bodies define Electromagnetic field (EMF) emission requirements that can be translated into control of the base station actual Effective Isotropic Radiated Power (EIRP), i.e., averaged over a sliding time window. In this work we show how to comply with such requirements by designing a water-filling power allocation method operating at the MAC scheduler level. Our method ensures throughput fairness across users while constraining the EIRP to a value that is produced by an outer-loop procedure which is not the focus of our paper. The low computational complexity of our technique is appealing given the tight computational requirements of the MAC scheduler. Our proposal is evaluated against the prior art approaches through massive-MIMO system level simulations that include realistic modeling of physical and MAC level cellular procedures. We conclude that our proposal effectively mitigates EMF exposure with considerably less impact on network performance, making it a standout candidate for 5G and future 6G MAC scheduler implementations.
- S. Wesemann, J. Du, and H. Viswanathan, “Energy efficient extreme MIMO: Design goals and directions,” IEEE Communications Magazine, 2023.
- Int. Commission. on Non-Ionizing Radiation Protection (ICNIRP), “Guidelines for limiting exposure to electromagnetic fields (100 kHz to 300 GHz),” Health physics, vol. 118, no. 5, pp. 483–524, 2020.
- Int. Electrotechnical Commission, “Determination of RF field strength, power density and SAR in the vicinity of radiocommunication base stations for the purpose of evaluating human exposure,” IEC 62232:2022.
- P. Baracca, A. Weber, T. Wild, and C. Grangeat, “A statistical approach for RF exposure compliance boundary assessment in massive MIMO systems,” in WSA 2018; 22nd International ITG Workshop on Smart Antennas. VDE, 2018, pp. 1–6.
- M. Rybakowski, K. Bechta, C. Grangeat, and P. Kabacik, “Impact of Beamforming Algorithms on the Actual RF EMF Exposure From Massive MIMO Base Stations,” IEEE Access, 2023.
- C. Törnevik, T. Wigren, S. Guo, and K. Huisman, “Time averaged power control of a 4G or a 5G radio base station for RF EMF compliance,” IEEE Access, vol. 8, pp. 211 937–211 950, 2020.
- T. Wigren and C. Törnevik, “Coordinated average EIRP control of radio transmitters for EMF exclusion zone computation,” IEEE Wireless Communications Letters, vol. 10, no. 9, pp. 2075–2079, 2021.
- M. R. Castellanos, D. J. Love, and B. M. Hochwald, “Hybrid precoding for millimeter wave systems with a constraint on user electromagnetic radiation exposure,” in 2016 50th Asilomar Conference on Signals, Systems and Computers. IEEE, 2016, pp. 296–300.
- L. Maggi, A. Herzog, A. Zejnilagic, and C. Grangeat, “Smooth Actual EIRP Control for EMF Compliance with Minimum Traffic Guarantees,” arXiv:2404.06624, 2024.
- P. Kela, J. Puttonen, N. Kolehmainen, T. Ristaniemi, T. Henttonen, and M. Moisio, “Dynamic packet scheduling performance in UTRA long term evolution downlink,” in 2008 3rd International Symposium on Wireless Pervasive Computing. IEEE, 2008, pp. 308–313.
- S. Mandelli, A. Lieto, P. Baracca, A. Weber, and T. Wild, “Power optimization for low interference and throughput enhancement for 5G and 6G systems,” in 2021 IEEE Wireless Communications and Networking Conference Workshops (WCNCW). IEEE, 2021, pp. 1–7.
- S. Mandelli, A. Lieto, M. Razenberg, A. Weber, and T. Wild, “Reducing interference via link adaptation in delay-critical wireless networks,” EURASIP Journal on Wireless Communications and Networking, vol. 2022, no. 1, p. 109, 2022.
- J. Mo and J. Walrand, “Fair end-to-end window-based congestion control,” IEEE/ACM Transactions on networking, vol. 8, no. 5, pp. 556–567, 2000.
- 3GPP, “TR 38.901. Study on channel model for frequencies from 0.5 to 100 GHz,” Technical Report, 2023.
- M. D. Zoltowski, M. Haardt, and C. P. Mathews, “Closed-form 2-D angle estimation with rectangular arrays in element space or beamspace via unitary ESPRIT,” IEEE Transactions on Signal Processing, vol. 44, no. 2, pp. 316–328, Feb. 1996.
- 3GPP, “TR 36.814. Further advancements for E-UTRA physical layer aspects,” Technical Report, 2017.
- ——, “TS38.214. NR; Physical layer procedures for data,” Technical Specification, 2020.