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通过无人机平台对地面网络提供网络通信覆盖可有效延伸地面网络通信设备的信息传输距离与扩大网络通信服务范围，然而无人机的续航能力成了空地网络不间断通信的瓶颈。本文提出了一种空地网络中空中节点接替飞行技术方案。该方案通过备用空中节点与原空中节点的双机自主协商与接替飞行，可为地面网络提供持续不间断通信服务，并有望应用于机动、短时通信覆盖任务中。该方案给出了设计目标、原理、详细流程与具体参数，并在实际测试中验证了其正确性与可行性。“,”The information transmission distance of land communication devices and the range of the communication service can be greatly extended when utilizing unmanned aerial vehicle to provide the communication coverage for the land network,yet the duration of flight becomes the bottleneck of the the duration of communication service. A method of replacing aerial node in the space network is listed,which achieved the autonomous communication and the replacement of flight,so the goal to provide the duration of flight can be realized and the actual value is hopeful to produced in the weak mobile and short time task. The goal,the principle,the detailed flow and the specific parameters are also provided,finally the actual experiments are finished and the method mentioned above is validated.