naa a22 4500 510797873 CHVBK 20180411083343.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11277-013-1042-y doi (NATIONALLICENCE)springer-10.1007/s11277-013-1042-y Wen Yean-Fu Graduate Institute of Information Management, National Taipei University, New Taipei City, Taiwan, ROC aut Distributed Delay-Aware Routing and Metrics Evaluation for Cognitive Radio Networks [Elektronische Daten] [Yean-Fu Wen] Cognitive radii can dynamically sense, negotiate, and switch to available spectral bands to enhance spectrum utilization. The available spectral resource may vary with time and places, which lead to several implementation difficulties to send data in multi-hop cognitive radio networks (CRNs). We considered such factors as available time, spectral bands, transmission ranges, error rates, and primary user interruption rates, as well as sensing, negotiating, selecting, and switching time, and designed a delay-aware routing metric for multi-band, multi-rate, and multi-range CRNs. A distributed routing scheme was designed, and the performance was evaluated by a centralized algorithm in regard to the average and maximal end-to-end delays. The results demonstrated that the metrics considering the link- and nodal-delays outperforms current solutions, including probability-aware, capacity-aware, and hop-count methods, by an average of 13%. We further discuss related issues and conclude our findings. Springer Science+Business Media New York, 2013 Cognitive radius nationallicence Delay-aware routing nationallicence Performance nationallicence Spectrum resource nationallicence End-to-end delay nationallicence Wireless Personal Communications Springer US; http://www.springer-ny.com 72/1(2013-09-01), 779-794 0929-6212 72:1<779 2013 72 11277 https://doi.org/10.1007/s11277-013-1042-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1042-y text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Wen Yean-Fu Graduate Institute of Information Management, National Taipei University, New Taipei City, Taiwan, ROC aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/1(2013-09-01), 779-794 0929-6212 72:1<779 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer