面向NOMA-ALOHA协议的非对称RSS等级均衡分配算法OA

Aimed at the problem of unfair received signal strength(RSS)level allocation caused by the limit-ed maximum transmission power in the air-to-ground communication of multi-unmanned aerial vehicles(UAVs)under the non-orthogonal multiple access(NOMA)-ALOHA protocol,an asymmetric RSS level balanced distribu-tion(ARBD)algorithm is proposed.The ARBD algorithm is applied to the NOMA-ALOHA protocol(denoted as the NOAL-ARBD scheme).The number of each selected RSS level is adjusted,and the probability of selecting each RSS level is also determined so that the UAVs selecting different RSS levels can be evenly distributed.The simulation results show that,compared with the other three schemes,the NOAL-ARBD scheme improves the sys-tem's throughput and fairness.