Author_Institution :
Center for Wireless Commun., California Univ., San Diego, La Jolla, CA, USA
Abstract :
The capture probabilities, Cn, defined as the probability that any of the n, contending packets are correctly received, are found with reference to a random-access mobile radio communications system in the presence or fading, shadowing, and near-far effect. A Rician model for fading that is more general than the well-studied Rayleigh fading is considered. The capture probabilities are computed, and their dependence on the system parameters and, in particular, on the Rice factor, K, is investigated. As an example of application, a slotted ALOHA system is considered, and the performance of a simple control strategy is studied. Also, some analytical results are given as to the value of Cα=limn-αCn, which is relevant to the study of the system stability
Keywords :
Rician channels; access protocols; fading; land mobile radio; packet radio networks; probability; random processes; stability; telecommunication control; Rice factor; Rician fading; Rician model; capture probabilities; control strategy; near-far effect; packet radio communications system; radio propagation effects; random-access mobile communications; shadowing; slotted ALOHA system; system parameters; system performance; system stability; Access protocols; Communication system control; Control systems; Land mobile radio; Mobile communication; Rayleigh channels; Receivers; Rician channels; Shadow mapping; Stability;
