As one of the emerging technologies of low-power wide-area Internet of things. narrow band Internet of things (NB-IoT) faces the pressure and challenge of massive connections of terminals. Aiming at practical application scenarios. a preamble allocation scheme based on Beta distribution was proposed. https://www.jmannino.com/mega-choice-Rose-Gold-Herringbone-iPhone-13-Pro-MagSafe-Case-p93485-limited-save/