基于动态时隙分割的空地协同NOMA传输资源与轨迹联合优化
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关键词：无人机通信；资源分配；协同传输；时隙共享；混合整数非线性规划中图分类号：TN929.5 文献标志码：A 文章编号：1001-3695（2026）04-026-1188-08doi：10.19734/j.issn.1001-3695.2025.08.0284
Joint optimization of transmission resources and trajectory for air-ground cooperative NOMA with dynamic time-slot division
Feng Liyang，Xu Wanping† （College of Information Engineering，ShanghaiMaritime University，Shanghai 2O13O6，China）
Abstract：Aiming at the critical issues of scarce spectrum resources and unmet user QoS in emergency communications，this paperconstructedanunmanned aerial vehicle（UAV）-assistedair-ground cooperative systemand proposeda dynamic timeslotdivisionbasedNOMA transmisionandresource alocationscheme.Thisschemedynamicallysplitedeachcommunication time slot.Itprioritized the groundbase station（GBS）toserve itsscheduledNOMAuserpairs.Ifanyuserfailed to meetthe QoSrequirementdue toinsuffcientpowerallcation fromtheGBS，the UAVprovidedcompensatorytransmission withintheremaining portionof thesame timeslot.Forthissystemmodel，itformulatedanoptimizationproblemto maximizethesystem throughputunderconstraintsofUAVenergy，basestationpower，ndspatiotemporalresources.Toenhancecomputatioalefficiency，theoriginal mixed-integer nonlinearprogramming problem wasdecoupled intothree subproblems：UAVtrajectoryoptimization，GBSuserschedulingandpoweralocation，andjointUAVpowerandtime-slotoptimization.ThepaperusedsuccessiveconvexapproximationandMcCormickenvelopes tohandlenonconvexconstraintsandadoptedahierarchicaldistributed iterative approach for solution. The results show that the proposed scheme achieves over 20% higher total system throughput and nearly 30% beter energy eficiency compared to static schemes.This demonstrates the superiority of the proposed scheme inbothoverallsystemthroughputandenergyeffciency，confimingitsefectivenessforpracticalappicationinemergencycommunications.
Key words：UAVcommunication；resourceallocation；coordinatedtransmision;time slotsharing；mixed-integer nonlinea programming
0引言
近年来，自然灾害致使地面通信基础设施遭到严重破坏，导致灾后关键信息难以实时采集，用户服务质量（qualityofservice，QoS）需求也难以得到保障[1～3]。（剩余20650字）