DocumentCode :
2723771
Title :
Near-far effect on slotted ALOHA channels with shadowing and capture
Author :
Linnartz, Jean-Paul M G ; Prasad, Ramjee
Author_Institution :
Delft Univ. of Technol., Netherlands
fYear :
1989
fDate :
1-3 May 1989
Firstpage :
809
Abstract :
Signal statistics are modelled in an environment of shadowing and ground wave path loss. This propagation model is used to investigate the channel performance of a slotted ALOHA network. The results are presented as receiver capture probability vs. packet propagation distance, with the log-normal variance and the offered traffic as parameters. Log-normal spatial distributions and uniform distributions of users over the coverage area are compared. The former facilitate the analysis of mobile packet-radio channels with near-far effect and shadowing and can often approximate the latter type of distribution. It is shown that stability and throughput cannot be realistically studied by (quasi-) uniform distributions. The log-normal subscriber density with a spatial spread of 8.68 dB gives a viable alternative to the study of the heavily loaded collision-type multiple-access channel
Keywords :
digital radio systems; fading; mobile radio systems; multi-access systems; packet switching; channel performance; ground wave path loss; heavily loaded collision-type multiple-access channel; log-normal spatial distributions of users; log-normal subscriber density; mobile packet-radio channels; near-far effect; packet propagation distance; propagation model; receiver capture probability; shadowing; signal statistics; slotted ALOHA channels; uniform distributions of users; Fading; Interference; Probability density function; Propagation losses; Rayleigh channels; Receivers; Shadow mapping; Telecommunication traffic; Throughput; Traffic control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 1989, IEEE 39th
Conference_Location :
San Francisco, CA
ISSN :
1090-3038
Type :
conf
DOI :
10.1109/VETEC.1989.40167
Filename :
40167
Link To Document :
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