说明：  在这论文中，我们提出了跨层设计共同纳入 继电器的选择和最佳功率分配策略，以提高 合作网络寿命，大大降低整体 功耗。
( In this paper, we proposed a cross-layer design jointly incorporating best relay selection and power allocation strategies to increase the cooperative network lifetime while minimizing the overall power consumption.)