Extension of ITU-R Site-General Path Loss Model in Urban Areas Based on Measurements from 2 to 66GHz Bands

Motoharu SASAKI; Mitsuki NAKAMURA; Nobuaki KUNO; Wataru YAMADA; Naoki KITA; Takeshi ONIZAWA; Yasushi TAKATORI; Hiroyuki NAKAMURA; Minoru INOMATA; Koshiro KITAO; Tetsuro IMAI

doi:10.1587/transcom.2020EBP3034

IEICE TRANSACTIONS on Communications

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Extension of ITU-R Site-General Path Loss Model in Urban Areas Based on Measurements from 2 to 66GHz Bands

Motoharu SASAKI, Mitsuki NAKAMURA, Nobuaki KUNO, Wataru YAMADA, Naoki KITA, Takeshi ONIZAWA, Yasushi TAKATORI, Hiroyuki NAKAMURA, Minoru INOMATA, Koshiro KITAO, Tetsuro IMAI

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Summary :

Path loss in high frequency bands above 6GHz is the most fundamental and significant propagation characteristic of IMT-2020. To develop and evaluate such high frequency bands, ITU-R SG5 WP5D recently released channel models applicable up to 100GHz. The channel models include path loss models applicable to 0.5-100GHz. A path loss model is used for cell design and the evaluation of the radio technologies, which is the main purpose of WP5D. Prediction accuracy in various locations, Tx positions, frequency bands, and other parameters are significant in cell design. This article presents the prediction accuracy of UMa path loss models which are detailed in Report ITU-R M.2412 for IMT-2020. We also propose UMa_A' as an extension model of UMa_A. While UMa_A applies different equations to the bands below and above 6GHz to predict path loss, UMa_A' covers all bands by using the equations of UMa_A below 6GHz. By using the UMa_A' model, we can predict path loss by taking various parameters (such as BS antenna height) into account over a wide frequency range (0.5-100GHz). This is useful for considering the deployment of BS antennas at various positions with a wide frequency band. We verify model accuracy by extensive measurements in the frequency bands from 2 to 66GHz, distances up to 1600 m, and an UMa environment with three Tx antenna heights. The UMa_A' extension model can predict path loss with the low RMSE of about 7dB at 2-26.4GHz, which is more accurate than the UMa_A and UMa_B models. Although the applicability of the UMa_A' model at 66GHz is unclear and needs further verification, the evaluation results for 66GHz demonstrate that the antenna height may affect the prediction accuracy at 66GHz.

Publication: IEICE TRANSACTIONS on Communications Vol.E104-B No.7 pp.849-857

Publication Date: 2021/07/01

Publicized: 2021/01/08

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2020EBP3034

Type of Manuscript: PAPER

Category: Antennas and Propagation

Authors

Motoharu SASAKI
  NTT Corporation
Mitsuki NAKAMURA
  NTT Corporation
Nobuaki KUNO
  NTT Corporation
Wataru YAMADA
  NTT Corporation
Naoki KITA
  NTT Corporation
Takeshi ONIZAWA
  NTT Corporation
Yasushi TAKATORI
  NTT Corporation
Hiroyuki NAKAMURA
  NTT Corporation
Minoru INOMATA
  NTT DOCOMO, INC.
Koshiro KITAO
  NTT DOCOMO, INC.
Tetsuro IMAI
  NTT DOCOMO, INC.

Keyword

5G, propagation, path loss model, UMa, IMT-2020, Rep. ITU-R M.2412

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Motoharu SASAKI, Mitsuki NAKAMURA, Nobuaki KUNO, Wataru YAMADA, Naoki KITA, Takeshi ONIZAWA, Yasushi TAKATORI, Hiroyuki NAKAMURA, Minoru INOMATA, Koshiro KITAO, Tetsuro IMAI, "Extension of ITU-R Site-General Path Loss Model in Urban Areas Based on Measurements from 2 to 66GHz Bands" in IEICE TRANSACTIONS on Communications, vol. E104-B, no. 7, pp. 849-857, July 2021, doi: 10.1587/transcom.2020EBP3034.
Abstract: Path loss in high frequency bands above 6GHz is the most fundamental and significant propagation characteristic of IMT-2020. To develop and evaluate such high frequency bands, ITU-R SG5 WP5D recently released channel models applicable up to 100GHz. The channel models include path loss models applicable to 0.5-100GHz. A path loss model is used for cell design and the evaluation of the radio technologies, which is the main purpose of WP5D. Prediction accuracy in various locations, Tx positions, frequency bands, and other parameters are significant in cell design. This article presents the prediction accuracy of UMa path loss models which are detailed in Report ITU-R M.2412 for IMT-2020. We also propose UMa_A' as an extension model of UMa_A. While UMa_A applies different equations to the bands below and above 6GHz to predict path loss, UMa_A' covers all bands by using the equations of UMa_A below 6GHz. By using the UMa_A' model, we can predict path loss by taking various parameters (such as BS antenna height) into account over a wide frequency range (0.5-100GHz). This is useful for considering the deployment of BS antennas at various positions with a wide frequency band. We verify model accuracy by extensive measurements in the frequency bands from 2 to 66GHz, distances up to 1600 m, and an UMa environment with three Tx antenna heights. The UMa_A' extension model can predict path loss with the low RMSE of about 7dB at 2-26.4GHz, which is more accurate than the UMa_A and UMa_B models. Although the applicability of the UMa_A' model at 66GHz is unclear and needs further verification, the evaluation results for 66GHz demonstrate that the antenna height may affect the prediction accuracy at 66GHz.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2020EBP3034/_p

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@ARTICLE{e104-b_7_849,
author={Motoharu SASAKI, Mitsuki NAKAMURA, Nobuaki KUNO, Wataru YAMADA, Naoki KITA, Takeshi ONIZAWA, Yasushi TAKATORI, Hiroyuki NAKAMURA, Minoru INOMATA, Koshiro KITAO, Tetsuro IMAI, },
journal={IEICE TRANSACTIONS on Communications},
title={Extension of ITU-R Site-General Path Loss Model in Urban Areas Based on Measurements from 2 to 66GHz Bands},
year={2021},
volume={E104-B},
number={7},
pages={849-857},
abstract={Path loss in high frequency bands above 6GHz is the most fundamental and significant propagation characteristic of IMT-2020. To develop and evaluate such high frequency bands, ITU-R SG5 WP5D recently released channel models applicable up to 100GHz. The channel models include path loss models applicable to 0.5-100GHz. A path loss model is used for cell design and the evaluation of the radio technologies, which is the main purpose of WP5D. Prediction accuracy in various locations, Tx positions, frequency bands, and other parameters are significant in cell design. This article presents the prediction accuracy of UMa path loss models which are detailed in Report ITU-R M.2412 for IMT-2020. We also propose UMa_A' as an extension model of UMa_A. While UMa_A applies different equations to the bands below and above 6GHz to predict path loss, UMa_A' covers all bands by using the equations of UMa_A below 6GHz. By using the UMa_A' model, we can predict path loss by taking various parameters (such as BS antenna height) into account over a wide frequency range (0.5-100GHz). This is useful for considering the deployment of BS antennas at various positions with a wide frequency band. We verify model accuracy by extensive measurements in the frequency bands from 2 to 66GHz, distances up to 1600 m, and an UMa environment with three Tx antenna heights. The UMa_A' extension model can predict path loss with the low RMSE of about 7dB at 2-26.4GHz, which is more accurate than the UMa_A and UMa_B models. Although the applicability of the UMa_A' model at 66GHz is unclear and needs further verification, the evaluation results for 66GHz demonstrate that the antenna height may affect the prediction accuracy at 66GHz.},
keywords={},
doi={10.1587/transcom.2020EBP3034},
ISSN={1745-1345},
month={July},}

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TY - JOUR
TI - Extension of ITU-R Site-General Path Loss Model in Urban Areas Based on Measurements from 2 to 66GHz Bands
T2 - IEICE TRANSACTIONS on Communications
SP - 849
EP - 857
AU - Motoharu SASAKI
AU - Mitsuki NAKAMURA
AU - Nobuaki KUNO
AU - Wataru YAMADA
AU - Naoki KITA
AU - Takeshi ONIZAWA
AU - Yasushi TAKATORI
AU - Hiroyuki NAKAMURA
AU - Minoru INOMATA
AU - Koshiro KITAO
AU - Tetsuro IMAI
PY - 2021
DO - 10.1587/transcom.2020EBP3034
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E104-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2021
AB - Path loss in high frequency bands above 6GHz is the most fundamental and significant propagation characteristic of IMT-2020. To develop and evaluate such high frequency bands, ITU-R SG5 WP5D recently released channel models applicable up to 100GHz. The channel models include path loss models applicable to 0.5-100GHz. A path loss model is used for cell design and the evaluation of the radio technologies, which is the main purpose of WP5D. Prediction accuracy in various locations, Tx positions, frequency bands, and other parameters are significant in cell design. This article presents the prediction accuracy of UMa path loss models which are detailed in Report ITU-R M.2412 for IMT-2020. We also propose UMa_A' as an extension model of UMa_A. While UMa_A applies different equations to the bands below and above 6GHz to predict path loss, UMa_A' covers all bands by using the equations of UMa_A below 6GHz. By using the UMa_A' model, we can predict path loss by taking various parameters (such as BS antenna height) into account over a wide frequency range (0.5-100GHz). This is useful for considering the deployment of BS antennas at various positions with a wide frequency band. We verify model accuracy by extensive measurements in the frequency bands from 2 to 66GHz, distances up to 1600 m, and an UMa environment with three Tx antenna heights. The UMa_A' extension model can predict path loss with the low RMSE of about 7dB at 2-26.4GHz, which is more accurate than the UMa_A and UMa_B models. Although the applicability of the UMa_A' model at 66GHz is unclear and needs further verification, the evaluation results for 66GHz demonstrate that the antenna height may affect the prediction accuracy at 66GHz.
ER -

IEICE TRANSACTIONS on Communications