上游充通大 SHANGHAI JIAO TONG UNIVERSITY Two-Dimensional Route Switching in Cognitive Radio Networks: A Game-Theoretical Framework Qingkai Liang,Xinbing Wang,Xiaohua Tian, Fan Wu,Qian Zhang1 Two-Dimensional Route Switching in Cognitive Radio Networks: A Game-Theoretical Framework Qingkai Liang, Xinbing Wang, Xiaohua Tian, Fan Wu, Qian Zhang