In addition, actual deployments service providers must support are varied and complex, ranging from small to large building complexes. Wireless options serve as building blocks to future proofing healthy sustainable buildings. These may include:
1. Distributed Antenna Systems (DAS): Centralized baseband, centralized radio, distributed antennas with analog or digital RF connecting radio head and antennas over dedicated cable
2. Distributed Radio Systems (DRS): Centralized baseband, radio and antenna integrated in one module and distributed throughout the building/venue; common public radio interface (CPRI) connecting the baseband and the radio head over dedicated cable.
3. Small Cells (distributed baseband systems): Baseband, radio and antenna integrated in one module and distributed throughout the building/venue.