一种高效可靠的无人机自组网多跳TDMA协议

设计无人机自组网媒体接入控制（Medium Access Control，MAC）协议时，需要考虑其控制开销和数据传输的可靠性。鉴于此，结合现有无线自组网多跳时分多址接入（Time Division Multiple Access，TDMA）协议和无人机自组网特点，提出了一种高效可靠的无人机自组网多跳TDMA协议。首先采用高效负载均衡的时隙请求信息上传机制，选择一个负载较小的节点转发节点时隙请求信息；然后根据相互通信的父节点删除重复节点的时隙请求信息，减少相同节点的时隙请求信息转发次数；最后通过实时更新节点时隙请求信息机制，提高节点时隙请求信息传输的可靠性。仿真结果表明，该协议在数据传输成功率、平均时延、控制开销方面优于现有协议，可较好地应用在无人机自组网中。

An efficient and reliable multi-hop TDMA protocol for UAV ad hoc networks

In designing medium access control(MAC)protocols for unmanned aerial vehicle(UAV)ad hoc networks,control overheads and reliability of data transmission are necessary to be considered.Based on the existing multi-hop time division multiple access(TDMA)protocol for wireless ad hoc networks and characteristics of UAV ad hoc networks,an efficient and reliable multi-hop TDMA protocol is proposed.The protocol adopts information uploading mechanism of time slot request which is efficient and load-balanced,as well as selects a node with a smaller load to forward its time slot request information.After that,according to the parent nodes communicating each other,the time slot request information of the duplicate node can be deleted,forwarding times of the time slot request information of the same node are reduced.Finally,by updating in real time the time slot request mechanism of the node,the reliability of message transmission of time slot request of the node can be improved.The simulation results indicate that the protocol is superior to other existing protocols in success rate of data transmission,average delay and control overheads,and it can be well applied to the UAV ad hoc networks.