Solution for weak RSRP reception and improvement of signal coverage in a large room. For various rooms, check solution for DAS.

The solution includes an outdoor omni antenna (see option with outdoor directional antenna), lightning protection, BDA, indoor dome antenna, and low-loss cables with appropriate connectors. Omni antenna is Useful when you don't know the direction of maximum received signal strength or don't want to orient outdoor antenna. It receives signal from all directions.

The drawing attached is for dual band cellular BDA. Use appropriate multi-band outdoor yagi antenna and indoor dome antenna.

4G LTE  or  5G NR router anywhere in the room should be able to receive sufficient signal propagated from the the dome antenna.