What are the techniques used to expand the capacity of cellular system?

14. What are the techniques used to expand the capacity of cellular system?

Cell splitting, Sectoring, Coverage Zone approaches are the techniques used to expand the capacity of cellular system.
Cell splitting – Cell-splitting is a technique which has the capability to add new smaller cells in specific areas of the system. i.e. divide large cell size into small size.
Sectoring – use of directional antennas to reduce Co-channel interference. Coverage Zone approaches – large central BS is replaced by several low power transmitters on the edge of the cell.