naa a22 4500 510792073 CHVBK 20180411083323.0 cr unu---uuuuu 180411e20130801xx s 000 0 eng 10.1007/s11277-012-0925-7 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0925-7 Spectrum Capacity for Ad Hoc Networks Using Cognitive Radios: An Analytical Model [Elektronische Daten] [Xiaorong Zhu, Juanjuan Shi, Longxiang Yang, Hongbo Zhu] Dynamic spectrum access (DSA) is an important design aspect for the cognitive radio networks (CRNs). Most of the existing DSA schemes are to govern the secondary user traffic in a licensed spectrum without considering the transmissions also in the unlicensed bands. In this paper, we propose two DSA schemes (i.e., without and with buffer) for cognitive radios access in both licensed and unlicensed bands in a distributed CRN. A Markov chain analysis for each of the proposed DSA schemes is presented and forced termination probability, blocking probability and traffic throughput are derived. In addition, we discuss a number of errors in the Markov model and analysis of the blocking and forced termination probabilities in a CRN, given in Al-Mahdi etal. (IEEE Commun Lett 13(9):676-678, 2009). This paper shows the corresponding correct derivations and results, and simulation results are given to support our analyses. Springer Science+Business Media New York, 2012 Cognitive radio nationallicence Ad hoc networks nationallicence Spectrum sharing nationallicence Markov chain nationallicence Zhu Xiaorong Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut Shi Juanjuan Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut Yang Longxiang Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut Zhu Hongbo Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut Wireless Personal Communications Springer US; http://www.springer-ny.com 71/3(2013-08-01), 2097-2109 0929-6212 71:3<2097 2013 71 11277 https://doi.org/10.1007/s11277-012-0925-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0925-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhu Xiaorong Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut NATIONALLICENCE 700 1- Shi Juanjuan Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut NATIONALLICENCE 700 1- Yang Longxiang Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut NATIONALLICENCE 700 1- Zhu Hongbo Jiangsu Key Lab of Wireless Communications, Key Lab of Broadband Wireless Communications and Sensor Network Technology, Ministry of Education, Nanjing University of Posts and Telecommunications, 210003, Nanjing, China aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/3(2013-08-01), 2097-2109 0929-6212 71:3<2097 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer