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An Enhanced Multiple Random Access Scheme for Satellite Communications

Bui, Huyen Chi and Lacan, Jérôme and Boucheret, Marie-Laure An Enhanced Multiple Random Access Scheme for Satellite Communications. (2012) In: Wireless Telecommunications Symposium (WTS 2012), 18-20 Apr 2012, London, United Kingdom .

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Abstract

In this paper, we introduce Multi-Slots Coded ALOHA (MuSCA) as a multiple random access method for satellite communications. This scheme can be considered as a generalization of the Contention Resolution Diversity Slotted Aloha (CRDSA) mechanism. Instead of transmitting replicas, this system replaces them by several parts of a single word of an error correcting code. It is also different from Coded Slotted ALOHA (CSA) because collided data are used in the iterative decoding of the frame. In MuSCA, the entity in charge of the decoding mechanism collects all bursts of the same user (including the interfered slots) before decoding and implements a successive interference cancellation process to remove successfully decoded signals. Simulations show that the achievable total normalized throughput is greater than 1.25 and 1.4 for a frame of 100 and 500 slots, resulting in a gain of 85% and 75% with respect to CRDSA and CSA respectively. This gain comes from the combination between diversity introduced by the random distribution of the data on the frames and MuSCA decoding algorithm, allows the system to transmit on average more than one packet per slot. This paper is a first analysis of the proposed scheme and opens several perspectives.

Item Type:Conference or Workshop Item (Paper)
Additional Information:Thanks to IEEE editor. (c) 2011 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. The definitive version is available at http://ieeexplore.ieee.org
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Université de Toulouse > Université de Toulouse II-Le Mirail - UTM
Université de Toulouse > Université de Toulouse I-Sciences Sociales - UT1
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Deposited By: Jérôme Lacan
Deposited On:13 Jul 2012 09:25

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