Advanced Aloha with SIC for Beaconing in a MANET

Abstract

Beaconing, the broadcast of information from one user of a network to all others within a certain neighborhood is required for a number of applications. This paper focuses on beaconing in a wireless, infrastructureless network with mobile users. In such a scenario, we analyze the performance of Advanced Aloha, the combination of Aloha with strong protection of messages against interference. Such protection is achieved through coding and other measures. Together with successive interference cancellation, it allows to resolve collisions. Analytical results will be presented for perfect interference cancellation. These include the maximum amount of messages per area and time for which a given communication range may be achieved, as well as the resulting maximum spectral efficiency at a receiver. Signal propagation according to a path loss exponent is taken into account together with a radio horizon limiting node visibility. Notably, this leads to results applicable to freespace propagation in contrast to other work ignoring the radio horizon.