Resumo

COVARRUBIAS, D.; MENDEZ, A.  e  VARGAS, C.. Performance analysis of S-Aloha used as a random acces channel on mobile communications. J. appl. res. technol [online]. 2005, vol.3, n.1, pp.5-14. ISSN 2448-6736.

This paper evaluates the effects of Rayleigh fading, shadowing, and spatial distribution of the Mobile Terminals (MTs) on the operating performance of Slotted Aloha (S-Aloha) used as a Random Access Channel (RACH). This paper also evaluates the capture probability in a channel exhibiting Rayleigh fading, shadowing, and the effect of spatial distribution of the MTs. In addition, this work presents a different version of the steady-sate probabilities of the Markov chain of S-Aloha considering capture effect. This article simulates the stabilization of S-Aloha by utilizing an algorithm that dynamically controls the retransmission probabilities. Finally, this paper presents a numerical analysis of these simulations and identifies the operating of parameters that have shown to degrade system response.

Palavras-chave : Mobile communications; Capture effect; Retransmission algorithm; S-Aloha stability.

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