High-Power Indoor Product Technical Solution

Solution Overview

This solution adopts a two-tier network architecture (receiver unit + high-power transmitter unit), using optical fiber to transmit base station signals, supporting multi-band 2G/3G/4G/5G/NB-IoT coverage. The receiver and transmitter units are independently powered (AC220V), suitable for high-difficulty scenarios (e.g., a tunnel in Chengdu), replacing traditional leakage cables with a wall-mounted antenna solution to achieve low-cost, low-construction difficulty signal coverage.

Architecture Description

• Receiver unit and high-power transmitter unit independently powered
• Optical fiber link between the receiver unit and high-power product, length ≤ 10km

Application Case

Chengdu Highway Tunnel Communication Coverage Innovative Case: A single tunnel with 3 lanes, 1933 meters long. Traditional coverage methods such as leakage cables/RRU + wall support + antennas are costly and difficult to install. We used a high-power + wall-mounted antenna cascading solution, connecting near and far-end equipment via optical fiber (AC 220V power supply, 1/2 jumper cables to passive antennas), achieving low-cost, fast deployment (6 people, 10 hours to complete). After installation, telecom and mobile signals were significantly enhanced, and the RSRP of the tunnel was improved to an average of -81.86dBm (SINR 9.97dB) for telecom, and -85.31dBm (SINR 10.71dB) for mobile. Voice calls were clear, and live streaming on Douyin achieved downlink speeds of 30Mbps and uplink speeds of 34Mbps. The system reduced uplink interference by over 20dB.