Show-Shiow Tzeng Ching-Wen Huang Threshold Based Call Admission Control for QoS Provisioning in Cellular Wireless Networks with Spectrum Renting. 17-22 2008 TeNe http://dx.doi.org/10.1007/978-90-481-3662-9_3 conf/cisse/2008tene db/conf/cisse/tene2008.html#TzengH08