High-rise buildings usually have a strong shielding effect on the network signal received by the mobile terminal. To be specific, walls, floors, rooms, heights are solid barriers for signal to penetrate, and that is the reason why often lower floors, undergrounds and elevators are common blind zones of mobile signals.

In the middle and above floors of the building, mobile terminals can come across to “Ping-Pong Effect”, which is to frequently switch between signal sources due to pilot pollution, and experience poor quality of mobile calls. In some buildings mobile phone can have normal calls, but suffer from going online. The problem may be caused by a large density of users and crowdedly occupied transmission channels. According to the current coverage situation, building an In-Building Distribution Antenna System can effectively solve these problems. In-Building Distribution Antenna System is a successful solution to improve the blind or weak areas of mobile communication in buildings. It captures the mobile signals from BTS via donor antenna, and distributes them to every room or floor with assistance of service antennas. Finally indoor areas are realized with enhanced signal coverage.

Technical Solution:

1. Single Operator:

• RF Repeater + Donor & Service Antenna + Jumper Cables;
• Repeater + Trunk Amplifier + Passives + Donor & Service Antenna + Jumper Cables;

2. Multi Operators:

• Multiple RF Repeaters + Passives + Donor & Service Antenna + Jumper Cables;
• Multi-Band DAS Repeater (Master Unit + Remote Unit) + Fiber Optical Cable + Donor & Service Antenna + POI + Passives;