Title :
Impact of adaptive array architectures on S-ALOHA protocol performance
Author :
de Araujo, R. ; Cavalcanti, F.R.P. ; Mota, J.C.M.
Author_Institution :
Inst. Nat. des Telecommun., Evry, France
Abstract :
We evaluate the influence of several antenna array topologies and channel models on the performance of a S-ALOHA MAC based network equipped with a smart antenna system at the base station. Two transmission scenarios are considered: an environment without angular dispersion and another where the angular spread is higher. Important behaviour differences between the two scenarios are observed when the network comes from an underloaded region to an overloaded one. A successive interference cancellation algorithm is used as a mean of enhancing network throughput in the overloaded regions
Keywords :
access protocols; adaptive antenna arrays; cellular radio; dispersion (wave); interference suppression; microcellular radio; packet radio networks; MAC protocol; S-ALOHA protocol; adaptive array architectures; angular dispersion; antenna array topologies; base station; macrocellular environments; microcellular environments; network throughput; overloaded region; smart antenna system; successive interference cancellation; underloaded region; wireless packet networks; Adaptive arrays; Antenna arrays; Base stations; Context modeling; Geometry; Linear antenna arrays; Media Access Protocol; Network topology; Throughput; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd
Conference_Location :
Rhodes
Print_ISBN :
0-7803-6728-6
DOI :
10.1109/VETECS.2001.944809
