“…After that, the applications of blockchain to spectrum management were investigated in [11,12], including four typical scenarios, i.e., primary cooperative sharing, secondary cooperative sharing, primary noncooperative sharing, and secondary noncooperative sharing. The applications of blockchain in spectrum management are successively proceeded, some focus on UAV spectrum management [13,14], some focus on the spectrum management in 5G/6G [15][16][17], and some focus on the spectrum management in Internet of Vehicles [18,19].…”