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On Provisioning Link Margin for High Bit Rate Q/V Band LEO Communication for Autonomous Vehicles
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DOI：10.1109/VTC2023-Fall60731.2023.10333555.png)
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Abstract
En 中文
Sixth-generation (6G) technology is expected to enhance satellite connectivity for autonomous vehicles, ensuring ubiquitous and uninterrupted service delivery even during unexpected disruptions or failures. To realize this ambitious objective, it is necessary to establish a vehicle-to-satellite (V2S) communication network characterized by ultra-reliability, low-latency and high data rate. Since autonomous vehicles are often battery-powered, the energy constraint poses a significant challenge in achieving this objective. Therefore, it is necessary to investigate non-terrestrial networks (NTN) channel models and comprehensively analyze the requisite link margin. Popular satellite communication channel models see shadowing as a two-state Markov process based on heavy shadowing (bad state) and light or no shadowing (good state) and transition between each state. This paper proposes a novel combined state encompassing the likelihood of both good and bad states. Our analysis with the combined state suggests that a sufficiently lower link margin is required to achieve 90% or higher link availability, compared to the link margin required for bad state. A combined state benchmarked system shall lead to optimized power consumption, extending the battery life of the autonomous vehicle and reducing its energy constraints. In the link-level simulations, signal-to-noise ratio (SNR) requirement to incur less than 10-3 bit error rate (BER) for the proposed combined state has been obtained. Interestingly, for the given BER, the SNR required for bad state is much higher compared to the combined state.
Keywords:
6G
autonomous vehicle
satellite communication
V2S
NTN
shadowing
Markov process
link margin
SNR
BER
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