I. INTRODUCTION  
II. LIDAR SLAM  
A. Lidar Sensors  
B. Lidar SLAM System  
C. Challenge and Future  
III. VISUAL SLAM  
A. Visual Sensors  
B. Visual SLAM System  
C. Challenge and Future  
V. AN ENVISION IN 6G WIRELESS NETWORKS  
A. The Advantages of 6G Wireless Networks  
B. 6G in Simultaneous Localization and Mapping  
VI. CONCLUSION