TY - JOUR
T1 - Investigation of Slotted ALOHA Under Nakagami Fading with Synchronized and Asynchronous Cochannel Cells
AU - Zhou, Lei
AU - Yao, Yu Dong
AU - Heffes, Harry
AU - Zhang, Ruifeng
PY - 2003/11
Y1 - 2003/11
N2 - The throughput performance of slotted ALOHA (S-ALOHA) in a cellular system and Nakagami fading environment is studied. Based on the signal capture model, the effects of the multiple access interference (MAI) from in-cell users and the cochannel interference (CCI) from cochannel cells are quantified analytically. Especially considered are the cases when asynchronism of cochannel cells is present, for which an approximation of the interference distribution is successfully applied to get a highly precise expression of the system throughput. Our study shows that though the MAI level and capture effect determine the basic behavior of the S-ALOHA, CCI significantly reduces the throughput of S-ALOHA and asynchronous CCI introduces an especially severe impairment. Our analytical framework is also able to incorporate additional channel conditions and system parameters like lognormal shadowing and the cellular cluster size.
AB - The throughput performance of slotted ALOHA (S-ALOHA) in a cellular system and Nakagami fading environment is studied. Based on the signal capture model, the effects of the multiple access interference (MAI) from in-cell users and the cochannel interference (CCI) from cochannel cells are quantified analytically. Especially considered are the cases when asynchronism of cochannel cells is present, for which an approximation of the interference distribution is successfully applied to get a highly precise expression of the system throughput. Our study shows that though the MAI level and capture effect determine the basic behavior of the S-ALOHA, CCI significantly reduces the throughput of S-ALOHA and asynchronous CCI introduces an especially severe impairment. Our analytical framework is also able to incorporate additional channel conditions and system parameters like lognormal shadowing and the cellular cluster size.
KW - Cellular system
KW - Cochannel interference
KW - Nakagami fading
KW - Slotted ALOHA
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U2 - 10.1109/TVT.2003.819622
DO - 10.1109/TVT.2003.819622
M3 - Article
AN - SCOPUS:0344875678
SN - 0018-9545
VL - 52
SP - 1642
EP - 1651
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
IS - 6
ER -