Throughput Analysis of Spread-Slotted ALOHA in LEO Satellite Communication Systems with Nonuniform Traffic Distribution

Abbas JAMALIPOUR  Masaaki KATAYAMA  Takaya YAMAZATO  Akira OGAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E78-B   No.12   pp.1657-1665
Publication Date: 1995/12/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Satellite Communication
Keyword: 
LEO satellite systems,  nonuniform traffic distribution,  spread-slotted ALOHA packet communication,  throughput analysis,  

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Summary: 
An analytical framework to study the nonuniformity in geographical distribution of the traffic load in low earth orbit satellite communication systems is presented. The model is then used to evaluate the throughput performance of the system with direct-sequence packet spread-slotted ALOHA multiple-access technique. As the result, it is shown that nonuniformity in traffic makes the characteristics of the system significantly different from the results of uniform traffic case and that the performance of each user varies according to its location. Moreover, the interference reached from users of adjacent satellites is shown to be one of the main factors that limit the performance of system.