OpenAlex ·
Doppler-Shannon Association in Vehicular Networks: A Stochastic Geometry Analysis
- Published
- Source
- OpenAlex
- Published in
- arXiv (Cornell University)
- DOI
- 10.48550/arxiv.2610.37928
- Original
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- Topics
Abstract
Historically, in cellular networks, the user equipment (UE) association with a base station (BS) has been largely confined to nearest BS association strategies. Unlike cellular networks wherein the BSs are static, vehicular networks are prone to high mobility, resulting in the UE experiencing a Doppler shift. The Doppler shift further results in the fading channel exhibiting high temporal variability. In this work, we present a novel stochastic geometry framework, modeling the effects of the Doppler shift on the physical layer network performance through the coherence time. First, the statistics of the Doppler shift are studied in a two- and three-dimensional Poisson point process (PPP) setting. The distribution and the geometric factors influencing the Doppler shift are analyzed. Next, we propose Doppler shift aware utilities, modeling the Doppler shift induced Shannon rate achievable in time-selective fading links. Through these utilities, we analytically study the outage and coverage probabilities for a UE to achieve a given quality of service. These probabilities are computed based on the optimal BS association in vehicular networks, which goes beyond the closest Euclidean distance. In the UE-BS line of sight, the novel BS association policies factor the BS direction of motion and the fading gain, in addition to the Euclidean distance. We show that the nearest BS is no longer the optimal BS association, resulting in non-convex coverage tessellations associated with the BSs. Our analytical and simulation results illustrate the need for a Doppler shift correction, complementing the ideal SNR based Shannon performance. The network performance achieved through the proposed Doppler-Shannon based association is proved, analytically as well as through simulations, to be superior to the classical Shannon based association.
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