Title :
On the Performance of Interference-Aware Cognitive Ad-Hoc Networks
Author :
Ghosh, A. ; Hamouda, Walaa
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, QC, Canada
Abstract :
In this paper we analyze the effects of channel availability on channel access delay and service probability of cognitive networks using a modified IEEE 802.11 Media Access Control Protocol (MAC). For the designed cognitive network, cognitive communication is limited by the interference imposed on primary users. We determine the probability of accessing the channel under Rayleigh fading condition for this opportunistic network. We then use this probability to determine the embedded Markov model of the cognitive nodes. We use this Markov model to determine the average channel access delay, and service rate of cognitive nodes. Both simulation and analytical results are presented to access the system performance.
Keywords :
Markov processes; Rayleigh channels; access protocols; ad hoc networks; cognitive radio; probability; Rayleigh fading condition; ad hoc networks; channel access delay; channel availability; cognitive communication; cognitive networks; cognitive nodes; embedded Markov model; media access control protocol; modified IEEE 802.11 MAC protocol; primary users; service probability; service rate; Analytical models; Availability; Delays; IEEE 802.11 Standards; Interference; Markov processes; Media Access Protocol; Cognitive networks; IEEE 802.11; access delay; service rate;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2013.090313.131535
