We see it all the time: a business buys 20 high-end access points, mounts them in a grid pattern on the ceiling, and then complains about poor wireless performance. The problem isn't the hardware, it's the design methodology.
The Problem with "Just Add More APs"
More access points don't automatically mean better coverage. In fact, too many APs can cause co-channel interference that degrades performance for everyone. Enterprise wireless design is as much about where NOT to place APs as where to place them.
Predictive Surveys: Design Before You Deploy
A predictive survey uses floor plans and building materials data to model RF propagation. This allows us to:
- Determine optimal AP placement before drilling a single hole
- Identify potential problem areas (concrete walls, elevator shafts, metal structures)
- Calculate the right number of APs for your coverage and capacity requirements
- Select the right antenna types for different environments
Spectrum Analysis: Understanding Your RF Environment
Before deploying any wireless network, you need to understand what's already in the air:
- Neighboring WiFi networks that could cause interference
- Non-WiFi interference sources (microwaves, Bluetooth devices, wireless cameras)
- Regulatory considerations for outdoor deployments
Capacity vs Coverage: Design for Both
Coverage means “can I associate?” Capacity means “can I sustain the apps I need when the room is full?”
- High-density venues (auditoriums, conference centers) need careful channel planning, reduced cell size, and sometimes dedicated high-density AP modes—not just more power.
- Office environments often fail on roaming and sticky clients long before raw RSSI looks bad. Validate roaming with real devices, not just survey software heat maps.
Wi‑Fi 6, 6E, and Planning for the Future
Newer standards bring OFDMA, better MU-MIMO behavior, and (where 6E is available) additional spectrum in the 6 GHz band. They do not fix bad placement. When you refresh hardware, revisit channel plans and minimum RSSI targets—your old 5 GHz plan may not translate one-to-one.
The Right Hardware for the Right Environment
Different environments call for different solutions:
- Office spaces: Indoor APs from Cisco, Aruba, or Juniper Mist with omnidirectional antennas
- Warehouses: High-gain directional antennas to cover large open areas
- Outdoor spaces: Weatherproof APs from Cambium or Fortinet with proper mounting hardware
- High-density areas: APs with advanced beamforming and MU-MIMO capabilities
Guest Wi‑Fi and Segmentation
Enterprise SSIDs should land users on isolated VLANs with outbound filtering—never flat into your server VLAN. Captive portals, rate limits, and client isolation reduce blast radius if a guest device is compromised.
Post-Deployment Validation
After installation, we perform active site surveys to validate that the design meets the performance requirements. We test for:
- Signal strength and signal-to-noise ratio in all coverage areas
- Roaming behavior between APs
- Throughput testing at various locations
- Application-specific testing (video conferencing, VoIP, etc.)
Troubleshooting Patterns We See After Go-Live
- Sticky clients that won’t roam: tune minimum data rates and band steering carefully—aggressive settings can backfire on older devices.
- DFS events on 5 GHz: radar hits can force channel changes; design with DFS-aware channel lists and monitoring.
- Power levels too high: APs “hear” each other and clients stick to the wrong AP—sometimes reducing TX power improves real-world performance.
Documentation and Handover
A proper handover package includes:
- As-built AP names, locations, and switch port mappings
- SSID/VLAN matrix and RADIUS settings (if applicable)
- Survey reports (predictive and validation)
- Change window notes for future additions
Getting wireless right the first time saves money, reduces user frustration, and ensures your network can support the applications your business depends on.