we also propose an energy-efficiency driven spectrum discovery scheme. Numerical results demonstrate significant energy saving-of cognitive radio technology in M2M communications from different point of views, including

An analytical model for estimating the energy efficiency of the scheme is presented, and several practical issues such as the effect of unreliable channels, topology changes, andMACoverhead are discussed. The results obtained show that the pr

有效提高移动终端的能量利用率，平衡终端的负载，延长数据共享时间，从而提高数据分发成功率.-EADS achieves significant performance improvement，in terms of energy utilization efficiency，balance load，as well as data sharing time，thus enhancing the success rate of data distribution