TY - JOUR
T1 - Effect of threshold quantization in opportunistic splitting algorithm
AU - Nam, Haewoon
AU - Alouini, Mohamed-Slim
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This work was supported by the research fund of Hanyang University (HY-2011-N), and also in part by the Qatar National Research Fund.
PY - 2011/12
Y1 - 2011/12
N2 - This paper discusses algorithms to find the optimal threshold and also investigates the impact of threshold quantization on the scheduling outage performance of the opportunistic splitting scheduling algorithm. Since this algorithm aims at finding the user with the highest channel quality within the minimal number of mini-slots by adjusting the threshold every mini-slot, optimizing the threshold is of paramount importance. Hence, in this paper we first discuss how to compute the optimal threshold along with two tight approximations for the optimal threshold. Closed-form expressions are provided for those approximations for simple calculations. Then, we consider linear quantization of the threshold to take the limited number of bits for signaling messages in practical systems into consideration. Due to the limited granularity for the quantized threshold value, an irreducible scheduling outage floor is observed. The numerical results show that the two approximations offer lower scheduling outage probability floors compared to the conventional algorithm when the threshold is quantized. © 2006 IEEE.
AB - This paper discusses algorithms to find the optimal threshold and also investigates the impact of threshold quantization on the scheduling outage performance of the opportunistic splitting scheduling algorithm. Since this algorithm aims at finding the user with the highest channel quality within the minimal number of mini-slots by adjusting the threshold every mini-slot, optimizing the threshold is of paramount importance. Hence, in this paper we first discuss how to compute the optimal threshold along with two tight approximations for the optimal threshold. Closed-form expressions are provided for those approximations for simple calculations. Then, we consider linear quantization of the threshold to take the limited number of bits for signaling messages in practical systems into consideration. Due to the limited granularity for the quantized threshold value, an irreducible scheduling outage floor is observed. The numerical results show that the two approximations offer lower scheduling outage probability floors compared to the conventional algorithm when the threshold is quantized. © 2006 IEEE.
UR - http://hdl.handle.net/10754/561949
UR - http://ieeexplore.ieee.org/document/6065243/
UR - http://www.scopus.com/inward/record.url?scp=84655163188&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2011.101711.110317
DO - 10.1109/LCOMM.2011.101711.110317
M3 - Article
SN - 1089-7798
VL - 15
SP - 1394
EP - 1397
JO - IEEE Communications Letters
JF - IEEE Communications Letters
IS - 12
ER -