一种高效的无人机自组网集中式多跳TDMA协议OA

[Objective]Unmanned Aerial Vehicle(UAV)Ad-Hoc Networks(UANET)are of significant value in modern com-munications.Their performance is constrained by the design of the Medium Access Control(MAC)protocol,which directly af-fects the overall communication efficiency and service quality of the network.In tree-topology network scenarios,existing Time Division Multiple Access(TDMA)protocols for UANETs suffer from issues such as excessive control overhead,long end-to-end delay,and low time slot utilization.To address these challenges,this paper proposes an efficient centralized multi-hop TD-MA protocol for UANET.[Methods]The proposed protocol employs a reverse topological ordering-based spatio-temporal re-source mapping mechanism for time slot allocation.By deriving the time slot sequence in reverse order,it can reduce the over-head.Furthermore,a time slot aggregation mechanism is introduced,allowing data to be transmitted continuously across multiple time slots within the current frame.This effectively decreases the transmission delay and utilizes the guard intervals between con-secutively allocated time slots to enhance the throughput.[Results]Simulation experiments conducted on the OPNET platform demonstrate that,compared to existing relevant protocols,the proposed protocol reduces overhead by 22.3%,underscoring its ef-fectiveness in signaling optimization.It also shortens the average data delay by 27.4%,validating the advantage of the time slot aggregation mechanism in improving transmission timeliness.Moreover,it increases the network throughput by 15.8%,proving its efficiency in spectrum resource utilization.These results confirm the effectiveness of the proposed mechanisms in resource allo-cation efficiency and transmission scheduling.[Conclusion]The proposed centralized multi-hop TDMA protocol demonstrates considerable feasibility for tree-topology UANET scenarios.It improves key network performance metrics while maintaining good engineering practicality.This protocol is suitable for UAV cluster applications.It can provide a valuable technical pathway and theoretical reference for the future optimization of UANET MAC protocols.