Abstract
Cognitive Radio is an intelligent wireless communication technology which can improve the radio spectrum utilization through opportunistically accessing the vacant portions of the spectrum. Due to the time-varying spectrum availability, a cognitive node has to perform spectrum switching frequently, which causes severe delay and high packet loss. Therefore, network protocol design for cognitive radio ad hoc networks (CRAHNs) should address this issue to ensure reliable end-to-end packet delivery. In this paper, we first propose a novel spectrum switching detection scheme for CRAHNs in which intermediate nodes monitor the variation of the Round-Trip Time (RTT) and the arrival interval time of packets to detect the spectrum switching over succeeding links. Based on the scheme, a new transport control mechanism is then designed to deal with spectrum switching in CRAHNs. We implement the proposed mechanisms on a USRP2-based testbed. The experiment results demonstrate that the mechanisms can detect the spectrum switching and improve end-to-end throughput by up to 45%.
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© 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering
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Han, R., Huang, X., Li, P. (2012). Transport Control Based on Spectrum Switching Detection in Cognitive Radio Ad Hoc Networks. In: Zhang, X., Qiao, D. (eds) Quality, Reliability, Security and Robustness in Heterogeneous Networks. QShine 2010. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, vol 74. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29222-4_1
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DOI: https://doi.org/10.1007/978-3-642-29222-4_1
Publisher Name: Springer, Berlin, Heidelberg
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