Open AccessModified 802.11‐Based Opportunistic Spectrum Access in Cognitive Radio Networks
Author(s) -
Zhai Linbo,
Zhang Xiaomin
Publication year - 2012
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.12.0211.0350
Subject(s) - cognitive radio , computer network , throughput , computer science , reservation , channel (broadcasting) , markov chain , access control , control channel , wireless , telecommunications , base station , machine learning
In this letter, a modified 802.11‐based opportunistic spectrum access is proposed for single‐channel cognitive radio networks where primary users operate on a slot‐by‐slot basis. In our opportunistic spectrum access, control frames are used to reduce the slot‐boundary impact and achieve channel reservation to improve throughput of secondary users. An absorbing Markov chain model is used to analyze the throughput of secondary users. Simulation results show that the analysis accurately predicts the saturation throughput.