Paper Info
Title
Secondary user access based on stochastic link estimation in cognitive radio with fibre-connected distributed antennas
Abstract
In this study, the authors consider the application of a system architecture called cognitive radio (CR) with fibre-connected distributed antennas in IEEE 802.22 wireless regional area networks (WRANs) as it could bring the benefits of much shorter wireless transmission distances, lower transmission power and the possibility of utilising multi-antenna transmission techniques. In this architecture, the authors study the secondary user (SU) access problem in uplink, where the SU to primary user (PU) link estimation is subject to random errors because PU could not assist link estimation of SU. This SU access problem is divided into two parts: antenna selection and access control. Thus, first antenna selection problem is modelled as a restless bandit problem, which is solved by the primal-dual index heuristic algorithm based on first order relaxation. In addition, the access control problem is modelled as a stochastic knapsack (SASK) problem with random weight, and then relaxed to be a deterministic second order cone programming problem. With the deduced upper bound, the access control problem is solved by the branch and bound algorithm, which yields the SU access based on SASK scheme. Simulation results illustrate the significant performance improvement of SASK scheme, compared with existing SU access methods.
Year
DOI
Venue
2013
10.1049/iet-com.2012.0627
IET Communications
Keywords
Field
DocType
pu link estimation,primal-dual index heuristic algorithm,ieee 802.22 wran,ieee 802.22 wireless regional area networks,stochastic processes,tree searching,branch and bound algorithm,sask problem,cognitive radio,wireless transmission distances,deduced upper bound,stochastic link estimation,convex programming,su access problem,antenna arrays,secondary user access,transmission power,fibre-connected distributed antennas,multiantenna transmission techniques,access control problem,stochastic knapsack problem,cr,deterministic second order cone programming problem,primary user link estimation,access control
Branch and bound,Mathematical optimization,Wireless,Access method,Heuristic (computer science),Computer network,Access control,Knapsack problem,Mathematics,Telecommunications link,Cognitive radio
Journal
Volume
Issue
ISSN
7
8
1751-8628
Citations 
PageRank 
References 
1
0.35
11
Authors
4
Name
Order
Citations
PageRank
Wendong Ge1123.10
Hong Ji281578.32
Xi Li315419.69
Victor C. M. Leung49717759.02