UAM 상공망과 위성 서비스의 주파수 공존 타당성 및 상향링크 성능 영향 분석

초록

Emerging services such as urban air mobility (UAM) face increasing difficulty in securing new spectrum with favorable propagation characteristics, making frequency coexistence with incumbent satellite services unavoidable. This paper investigates the impact of Broadcast Satellite Service (BSS) interference on the uplink performance of a UAM aerial network operating in a shared spectrum environment. A three-dimensional air-corridor-based UAM network model is developed, and network-level simulations are performed in a multi-cell, multi-user setting. Uplink interference, signal-to-interference-plus-noise ratio (SINR), and cell sum-rate are evaluated on a resource-block basis under ITU-R power flux density constraints. The results show that BSS interference increases uplink interference and degrades SINR across the network. However, the impact on uplink cell throughput remains limited due to the discrete modulation and coding scheme structure of 5G-based UAM network, suggesting that, in practical terms, a UAM aerial network can operate under frequency coexistence conditions with BSS.

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