Paper Info
Title
Cooperative Slotted Aloha for Multi-Base Station Systems
Abstract
We introduce a framework to study slotted Aloha with cooperative base stations. Assuming a geographic-proximity communication model, we propose several decoding algorithms with different degrees of base stations' cooperation (non-cooperative, spatial, temporal, and spatio-temporal). With spatial cooperation, neighboring base stations inform each other whenever they collect a user within their coverage overlap; temporal cooperation corresponds to (temporal) successive interference cancellation done locally at each station. We analyze the four decoding algorithms and establish several fundamental results. With all algorithms, the peak throughput (average number of decoded users per slot, across all base stations) increases linearly with the number of base stations. Further, temporal and spatio-temporal cooperations exhibit a threshold behavior with respect to the normalized load (number of users per station, per slot). There exists a positive load , such that, below , the decoding probability is asymptotically maximal possible, equal the probability that a user is heard by at least one base station; with non-cooperative decoding and spatial cooperation, we show that is zero. Finally, with spatio-temporal cooperation, we optimize the degree distribution according to which users transmit their packet replicas; the optimum is in general very different from the corresponding optimal distribution of the single-base station system.
Year
DOI
Venue
2014
10.1109/TCOMM.2015.2403855
Communications, IEEE Transactions  
Keywords
DocType
Volume
Base stations,Decoding,Throughput,Silicon carbide,Protocols,Interference cancellation,Receivers
Journal
63
Issue
ISSN
Citations 
4
0090-6778
14
PageRank 
References 
Authors
0.64
34
4
Name
Order
Citations
PageRank
Dusan Jakovetic134525.15
Dragana Bajovic28612.60
Dejan Vukobratović337836.82
Vladimir S. Crnojevic418617.82