Paper Info
Title
Protocol design and performance analysis for cognitive cooperative networks with multiple antennas.
Abstract
In this article, we deal with a novel access protocol design for cognitive cooperative networks with multiple antennas. According to the principles of cognitive radio, the secondary user (SU) can exploit the primary user (PU) burstiness to access the licensed spectrum in the proposed access protocol. To get more access opportunities to the licensed spectrum, the SU simultaneously relays the PU's packets and transmits its own packets based on the superposition coding. Furthermore, to concurrent transmission of the PU's packets and SU's packets based on the superposition coding such that they are received without the interference at the primary receiver and secondary receiver respectively, two weight vectors at the SU equipped with multiple antennas are designed based on zero-forcing algorithm. Specifically, from a networking perspective, we analyze the performance of the proposed access protocol in terms of the maximum stable throughput and the average end-to-end delay for both the PU and SU based on the principles of queueing theory. In addition, to protect the PU's performance and exhibit the advantage of adopting multiple antenna technology, we jointly optimize the parameter of superposition coding and the number of antennas, and define the maximum stable throughput cooperative gain compared to the non-cooperative access scheme. More importantly, the impact of imperfect channel state information (CSI) at the SU on the maximum stable throughput and the average end-to-end delay performance is evaluated in the simulations from a practical point of view. Analysis and simulation results demonstrate that the proposed access protocol achieves significant performance gains for both the PU and the SU, outperforms the existing cooperative access protocol based on the dirty-paper coding, and keeps robust against to the imperfect CSI. © 2013 Huang et al.
Year
DOI
Venue
2013
10.1186/1687-1499-2013-70
EURASIP J. Wireless Comm. and Networking
Keywords
Field
DocType
cognitive cooperative networks,delay analysis,queueing theory,stable throughput,zero-forcing algorithm
Computer science,Network packet,Computer network,Exploit,Coding (social sciences),Burstiness,Queueing theory,Protocol design,Interference (wave propagation),Cognitive radio
Journal
Volume
Issue
ISSN
2013
1
16871499
Citations 
PageRank 
References 
12
0.41
25
Authors
4
Name
Order
Citations
PageRank
Yuzhen Huang118312.97
Qi-hui Wu21383102.61
Jin-Long Wang3140294.86
Yunpeng Cheng4858.84