Real-Time Passenger Information Systems for a 28-Gate International Airport
Challenge
Aerolia’s passenger information displays were fragmented across three legacy systems from different vendors, each managed independently. Flight data from the AODB took up to 8 minutes to propagate to gate displays, and gate changes required manual updates across systems, leading to inconsistencies. Passenger complaints about inaccurate or delayed information became the airport’s second-highest complaint category.
Solution
We replaced the fragmented systems with a unified digital signage platform: a single CMS managing all 340 screens across the terminal, direct AODB integration enabling sub-30-second data propagation, and an automated gate change cascade that updates all relevant displays simultaneously through an event-driven architecture.
Results
Flight data propagation reduced from 8 minutes to 23 seconds. Gate change updates cascade across all relevant screens in under 15 seconds. Passenger information complaints reduced by 71% in the first year. Display operations consolidated into a single team, eliminating reliance on three separate vendor systems.
The Fragmentation Problem
Aerolia’s passenger information system had evolved over 15 years into three separate platforms:
- Departures system (1990s legacy)
- Gate information system (2008)
- Arrivals and baggage system (2014)
Each ran on different hardware, software, and operational workflows.
The Operational Constraints
- Flight data propagation: up to 8 minutes
- Gate changes required manual updates across 3 systems
- No synchronisation between displays
- High dependency on vendor-specific tooling
The Passenger Impact
- Gate change confusion at boarding
- Inconsistent information across screens
- Passenger complaints became the #2 issue at the airport
This wasn’t a display issue. It was a systems integration problem
The Architecture Strategy
The objective was to replace fragmented systems with a single real-time information layer across the entire terminal.
Unified Display Layer
- 340 screens across terminal
- Single CMS for all display types (departures, gates, arrivals, baggage)
- Centralised control with role-based access
Real-Time Data Integration
AODB integration – direct connection to the Airport Operational Database using SSIM/AIDX message formats
- Message listener processes updates within <5 seconds
- Translates flight data into display events
- Eliminates manual data entry across systems
Cascade Update Engine
A single operational change triggers system-wide updates:
- Original gate displays → show change notification
- New gate displays → add flight details
- Departures boards → update gate assignment
- Check-in displays → reflect updated routing
All updates executed as a single atomic eventEnd-to-end propagation: <15 seconds
Context-Aware Display Logic
Screen content adapts to location:
- Security zones → queue times and alerts
- Gate areas → boarding status and calls
- Baggage reclaim → carousel assignments
Emergency Broadcast Layer
- One-click override system
- Instant broadcast to all screens
- Bypasses standard scheduling and logic
Used for:
- security alerts
- operational disruptions
- evacuation messaging
Monitoring & Operations
- Centralised control dashboard
- Real-time system health monitoring
- No dependency on multiple vendor interfaces
Results at Scale
- Flight data propagation: 8 minutes → 23 seconds
- Gate change cascade: <15 seconds across all screens
- Passenger information complaints: -71%
- 3 vendor systems → 1 unified platform
Operational Impact
- Display operations reduced from 6 operators → 2
- Eliminated need for multi-system coordination
- Faster response to real-time operational changes
Freed capacity was redeployed to passenger-facing roles.
The Key Insight
Airport information systems fail when:
- data is delayed
- systems are fragmented
- updates are manual
Real-time passenger communication requires:
- a single source of truth
- event-driven architecture
- system-wide synchronisation
Final Outcome
A unified passenger information system that:
- delivers real-time, consistent updates
- reduces operational complexity
- improves passenger experience at scale
Result: Aerolia transformed passenger communication from fragmented and delayed to fast, reliable, and centrally controlled.