Title :
An ARQ mechanism considering resource and traffic priorities in cognitive radio systems
Author :
Jeon, Soo-Yong ; Cho, Dong-Ho
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
7/1/2009 12:00:00 AM
Abstract :
In multi-hop relaying systems that have many relay stations (RSs), a cognitive radio (CR) technique can improve system performance greatly, due to an efficient resource sharing between the RSs. In this letter, the performance of an ARQ mechanism for CR-based multi-hop relaying systems is studied, using Markov chain and matrix signal flow graph (MSFG) techniques. Also, a priority-based resource allocation scheme is proposed to prevent performance degradation caused by the usage of unstable resources acquired by the CR technique.
Keywords :
Markov processes; automatic repeat request; cognitive radio; graph theory; matrix algebra; resource allocation; telecommunication traffic; ARQ mechanism; Markov chain technique; cognitive radio systems; matrix signal flow graph technique; multihop relaying systems; priority-based resource allocation scheme; relay stations; resource priorities; resource sharing; traffic priorities; Automatic repeat request; Chromium; Cognitive radio; Degradation; Flow graphs; Relays; Reliability; Resource management; Roads; System performance; Cognitive radio, ARQ, multi-hop.;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.081941
