TY - GEN
T1 - Delay analysis of a point-to-multipoint spectrum sharing network with CSI based power allocation
AU - Khan, Fahd Ahmed
AU - Tourki, Kamel
AU - Alouini, Mohamed-Slim
AU - Qaraqe, Khalid A.
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2012/10
Y1 - 2012/10
N2 - In this paper, we analyse the delay performance of a point-to-multipoint cognitive radio network which is sharing the spectrum with a point-to-multipoint primary network. The channel is assumed to be independent but not identically distributed and has Nakagami-m fading. A constraint on the peak transmit power of the secondary user transmitter (SU-Tx) is also considered in addition to the peak interference power constraint. Based on the constraints, a power allocation scheme which requires knowledge of the instantaneous channel state information (CSI) of the interference links is derived. The SU-Tx is assumed to be equipped with a buffer and is modelled using the M/G/1 queueing model. Closed form expressions for the probability distribution function (PDF) and cumulative distribution function (CDF) of the packet transmission time is derived. Using the PDF, the expressions for the moments of transmission time are obtained. In addition, using the moments, the expressions for the performance measures such as the total average waiting time of packets and the average number of packets waiting in the buffer of the SU-Tx are also obtained. Numerical simulations corroborate the theoretical results. © 2012 IEEE.
AB - In this paper, we analyse the delay performance of a point-to-multipoint cognitive radio network which is sharing the spectrum with a point-to-multipoint primary network. The channel is assumed to be independent but not identically distributed and has Nakagami-m fading. A constraint on the peak transmit power of the secondary user transmitter (SU-Tx) is also considered in addition to the peak interference power constraint. Based on the constraints, a power allocation scheme which requires knowledge of the instantaneous channel state information (CSI) of the interference links is derived. The SU-Tx is assumed to be equipped with a buffer and is modelled using the M/G/1 queueing model. Closed form expressions for the probability distribution function (PDF) and cumulative distribution function (CDF) of the packet transmission time is derived. Using the PDF, the expressions for the moments of transmission time are obtained. In addition, using the moments, the expressions for the performance measures such as the total average waiting time of packets and the average number of packets waiting in the buffer of the SU-Tx are also obtained. Numerical simulations corroborate the theoretical results. © 2012 IEEE.
UR - http://hdl.handle.net/10754/564617
UR - http://ieeexplore.ieee.org/document/6478134/
UR - http://www.scopus.com/inward/record.url?scp=84876019303&partnerID=8YFLogxK
U2 - 10.1109/DYSPAN.2012.6478134
DO - 10.1109/DYSPAN.2012.6478134
M3 - Conference contribution
SN - 9781467344487
SP - 235
EP - 241
BT - 2012 IEEE International Symposium on Dynamic Spectrum Access Networks
PB - Institute of Electrical and Electronics Engineers (IEEE)
ER -