As the “underground artery” of urban buildings, underground parking lots are not only essential passageways for car owners but also “difficult blind spots” for signal coverage. Within a 10,000㎡ space, obstacles like wall blockages and complex structures often cause issues such as failed mobile navigation, disrupted remote control, unworkable QR code payments, and dropped calls. This not only ruins user experience but also hides safety hazards for emergency communications.
underground parking lots mobile signal booster for car
Previously, we received a request from a partner to create a comprehensive signal coverage solution for their 10,000㎡ underground parking lot. From on-site surveys and customized planning to equipment installation and debugging, our team optimized signal points based on the space layout and overcame coverage challenges with professional technology. In the end, we achieved full call and network signal coverage in the parking lot, successfully meeting the cooperation goals.
Today, we are sharing this practical case in detail, hoping to provide actionable solutions for more partners facing similar signal dilemmas.
Project Background and Overview
Location：A residential community in Hangzhou, Zhejiang Province, China
Coverage Area：4,000 ㎡ on B2 , 6,000 ㎡ on B1
Challenge: Due to its large area and deep underground location, signals are hard to penetrate. Before coverage enhancement, there was no signal from China’s three major telecom operators in the area.
The client searched for “gsm mobile signal booster for underground parking/basement” and found Lintratek Technology via our official website (https://www.lintratek.com/), asking us to customize a professional signal coverage solution for the underground parking lot.
Professional technicians Signal Repeater for Multiple Frequency Bands
Client Needs and Project Features
Currently, newly built residential communities in China must meet technical standards for communication supporting projects. Public areas like underground parking lots require signal coverage; otherwise, the project cannot be delivered.
Key Requirement: The client had extremely high demands for the reliability and technical adaptability of communication equipment. They required full signal coverage without blind spots in the underground parking lot, which meant enhancing the call quality and 4G/5G network signals of China’s three major telecom operators.
Challenge: The parking lot had a large area and was deeply underground. Electromagnetic waves attenuated rapidly in the enclosed space, making it difficult to cover with traditional base stations.
Solution Design and Implementation
After initial online communication and on-site surveys, our team adopted the “Specialized Signal Coverage System for Residential Underground Parking Lots”. This solution uses optical signal conversion to achieve long-distance transmission with low loss.
The fiber optic signal repeater used in this solution offers advantages such as signal interference shielding, radiation prevention, and IP65 waterproof and moisture-proof performance. It supports ultra-long-distance transmission, is suitable for large-scale projects, and can be configured into multiple coverage modes.
The host converts mobile communication signals into optical signals, which are transmitted from the ground to the underground via optical fibers—minimizing interference and loss. We installed receiving antennas above ground to capture signal sources and deployed transmitting antennas underground according to the signal point map.
Find the signal source and configure the receiving antenna outdoors, and configure the transmitting antenna indoors based on the point map.
To address potential on-site emergencies, Lintratek’s communication team prepared two backup signal coverage plans. All three plans (the main plan and two backups) can be combined based on on-site conditions, eliminating the need for rigid, one-size-fits-all configurations.
This flexibility stems from Lintratek’s years of experience in the signal coverage industry—we have systematically summarized and categorized signal coverage challenges across various scenarios, continuously optimizing and upgrading our solutions.
After the system was set up, we connected the main line to the repeater and completed the installation. During the test run, calls and internet access were smooth, completely resolving the no-signal issue in the underground parking lot.
Client Feedback
If you have an underground parking lot or a basement that also requires signal coverage,please feel free to contact us at any time.
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Post time: Sep-09-2025