| Texto completo | |
| Autor(es): |
Fidele Adanvo, Vignon
;
Mafra, Samuel
;
Montejo-Sanchez, Samuel
;
Tondo, Felipe Augusto
;
Souza, Richard Demo
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | IEEE SENSORS JOURNAL; v. 26, n. 2, p. 14-pg., 2026-01-15. |
| Resumo | |
The integration of low Earth orbit (LEO) satellites with Internet of Things (IoT) devices has driven the need for efficient, low-complexity multiple access techniques. However, most approaches based on the Slotted Aloha protocol rely on the on-off channel model, which oversimplifies the physical channel phenomena and neglects critical fading effects. To overcome this limitation, the present work develops a precise closed-form analytical model for instantaneous throughput, outage, and data collision probabilities of a direct-to-satellite-IoT (DtS-IoT) network operating over Nakagami-m fading channels while employing the Slotted Aloha technique. The analysis accounts for the presence of multiple satellites in orbit, each with different channel loads and elevation angles, thus providing a more realistic representation of fading conditions and intersatellite variability. The simulation results confirm the validity of the proposed analytical expressions and show that they exhibit excellent agreement with theoretical predictions under Nakagami-m fading. Furthermore, the results indicate that dynamically adjusting the transmit power and channel load, especially when satellite position information is available, can significantly increase system throughput and provide actionable insights for system optimization in terms of energy efficiency and overall performance. (AU) | |
| Processo FAPESP: | 22/09319-9 - Centro de Ciência para o Desenvolvimento em Agricultura Digital - CCD-AD/SemeAr |
| Beneficiário: | Silvia Maria Fonseca Silveira Massruhá |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Ciência para o Desenvolvimento |
| Processo FAPESP: | 20/05127-2 - SAMURAI: núcleo 5G inteligente e integração de múltiplas redes de acesso |
| Beneficiário: | Aldebaro Barreto da Rocha Klautau Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |