DocumentCode :
1284471
Title :
Can One Achieve Multiuser Diversity in Uplink Multi-Cell Networks?
Author :
Won-Yong Shin ; Dohyung Park ; Bang Chul Jung
Author_Institution :
Div. of Mobile Syst. Eng., Dankook Univ., Yongin, South Korea
Volume :
60
Issue :
12
fYear :
2012
fDate :
12/1/2012 12:00:00 AM
Firstpage :
3535
Lastpage :
3540
Abstract :
We introduce a distributed opportunistic scheduling (DOS) strategy, based on two pre-determined thresholds, for uplink K-cell networks with time-invariant channel coefficients. Each base station (BS) opportunistically selects a mobile station (MS) who has a large signal strength of the desired channel link among a set of MSs generating a sufficiently small interference to other BSs. Then, performance on the achievable throughput scaling law is analyzed. As our main result, it is shown that the achievable sum-rate scales as K log(SNR log N) in a high signal-to-noise ratio (SNR) regime, if the total number of users in a cell, N, scales faster than SNRK-1/1-ε for a constant ε∈(0,1). This result indicates that the proposed scheme achieves the multiuser diversity gain as well as the degrees-of-freedom gain even under multi-cell environments. Simulation results show that the DOS provides a better sum-rate throughput over conventional schemes.
Keywords :
cellular radio; wireless channels; DOS strategy; SNR; base station; channel link; degrees-of-freedom gain; distributed opportunistic scheduling strategy; mobile station; multicell environments; multiuser diversity gain; predetermined thresholds; signal-to-noise ratio; time-invariant channel coefficients; uplink K-cell networks; uplink multicell networks; Diversity methods; Fading; Interference; Protocols; Signal to noise ratio; Throughput; Wireless scheduling; cellular uplink; degrees-of-freedom; inter-cell interference; multi-user diversity;
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2012.091012.110152
Filename :
6302112
Link To Document :
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