应急场景下基于可靠无线通信的D2 U功率控制机制研究

针对应急场景下通信可靠性低的问题,提出了无人机(unmanned aerial vehicle,UAV)辅助模式下基于自动重传请求(automatic repeat request,ARQ)的设备与无人机(device-to-unmanned aerial vehicle,D2U)通信功率控制策略.利用通信失败率来表示通信可靠性,分析了数据包与重传确认(ACKnowledgement,ACK)的接收失败率,进而得出D2U通信失败率;在快衰落和慢衰落2种模型下定义通信失败率优化问题.针对优化问题,设计功率控制迭代算法,该算法充分考虑了重传所带来的能耗以及ACK丢失的情况.Monte Carlo仿真结果表明,所提出的功率控制策略相比其他策略具有更低的通信失败率,从而保证应急场景下D2U通信的可靠性.

Research on D2U power control mechanism based on reliable wireless communication in emergency scenarios

Aiming to solve the problem of low communication reliability in emergency scenarios, we propose a power control policy for device-to-unmanned aerial vehicle communication based on automatic repeat request. Through representing the communication reliability to the communication failure probability, this paper first analyzes the failure probability of receiving packets and ACKnowledgement (ACK) to obtain the D2U communication failure probability; and then formulates the optimization problem of communication failure probability under the fast fading and slow fading model, respectively. To address the optimization problems, we design an iteration-based power control algorithm. The algorithm fully considers the energy consumption caused by retransmissions and the loss of ACK. Monte Carlo simulation results show that the power control policy proposed in this paper has a lower communication failure probability compared with others, thereby ensuring the reliability of D2U communication in emergency scenarios. Keywords: