I. INTRODUCTION  

II. LICENSED SHARED ACCESS  

III. ADEL IMPROVED LSA  

IV. EVOLVED LSA  

V. SPECTRUM ACCESS SYSTEM  

VI. DYNAMIC SPECTRUM SHARING  

VII. LTE-UNLICENSED AND LICENSED ASSISTED ACCESS  

VIII. MULTEFIRE  

X. APPLICATION OF AI AND ML IN SPECTRUM SHARING  

XI. PRICING MODELS AND ECONOMIC ISSUES  

XII. OPEN PROBLEMS AND ISSUES  
XIII. CONCLUSION  