In-Building Cellular Coverage: Solving Belgium's Indoor Connectivity Challenge

Walk into many Belgian buildings — from historic townhouses in Ghent to modern glass-and-steel offices in Brussels — and your phone signal drops. This isn't a minor inconvenience; it's a business problem affecting productivity, safety (indoor emergency calls), and building value.

Why Indoor Coverage Fails

Modern buildings are increasingly effective at blocking cellular signals:

• Low-E glass: Energy-efficient windows with metallic coatings attenuate signals by 20-30 dB.
• Concrete and steel: Thick walls and reinforced concrete structures block signal penetration.
• Building depth: Core areas of large buildings receive minimal signal from external towers.
• Underground spaces: Parking garages and basements have virtually no coverage.

Solution Options

1. Digital Band-Selective Repeaters

Best for: Small to medium buildings (up to ~5,000 m²)

Digital repeaters capture the outdoor signal via a donor antenna, amplify specific frequency bands, and redistribute the signal indoors through server antennas. Unlike analog repeaters, digital models offer:

• Band-selective filtering (amplify only desired operators/frequencies)
• Higher system gain without oscillation risk
• Remote monitoring and management
• Automatic gain control

2. Distributed Antenna Systems (DAS)

Best for: Large venues, hospitals, airports, shopping centers

DAS uses a fiber or coaxial backbone to distribute signals from a central hub to multiple antenna points throughout a building. This provides consistent coverage across large areas and can support multiple operators simultaneously.

3. Small Cells

Best for: High-capacity environments with IP backhaul available

Small cells are miniature base stations that create their own coverage area. They require an internet connection and operator coordination but provide the highest capacity.

Deployment Process

A typical in-building coverage project follows these phases:

1. RF Survey: Measure existing coverage levels throughout the building to identify dead zones and weak areas.
2. Design: Create an RF plan specifying antenna locations, cable runs, and equipment specifications.
3. Regulatory: Obtain necessary approvals from BIPT and coordinate with mobile operators.
4. Installation: Professional installation with minimal disruption to building operations.
5. Commissioning: Verify coverage meets specifications with walk-test measurements.
6. Maintenance: Ongoing remote monitoring and periodic optimization.

Belgian Regulatory Framework

In Belgium, indoor coverage solutions must comply with BIPT regulations. Repeaters require type approval and must not cause interference with the macro network. Rays Technology handles all regulatory aspects, including coordination with Proximus, Orange, and Telenet/BASE.

Request an RF survey for your building →

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