Hospital Wi-Fi
Why coverage in a hospital is harder than in an office — and what 'medical-grade' actually means.
An RF-hostile building
Concrete floors, lead-lined imaging suites, dense metal ductwork, and constant physical reconfiguration make hospitals uniquely difficult radio environments. Coverage plans that work on paper often fail in practice.
What 'medical-grade' means
"Medical-grade Wi-Fi" is not a certification. It is a service posture:
- Separate SSIDs and VLANs for clinical, medical device (biomed), staff, guest, and IoT/BMS.
- Tight QoS for real-time traffic (voice, video, alarm middleware).
- Aggressive monitoring at the client level, not just the AP.
- Change control tied to biomedical engineering — a firmware upgrade to an AP is a medical-device network change.
Design targets
| Metric | Clinical target |
|---|---|
| Signal strength (RSSI) at bedside | ≥ −65 dBm |
| SNR | ≥ 25 dB |
| Cell overlap for roaming | ≥ 20% at −67 dBm |
| Voice/alarm one-way delay | ≤ 150 ms |
| Voice/alarm jitter | ≤ 30 ms |
| Voice/alarm packet loss | ≤ 1% |
| Roam time between APs | ≤ 150 ms |
Roaming and handoff
Infusion pumps, wireless phones, and mobile monitors move constantly. Whether they hand off cleanly between APs determines whether the network is trustworthy for clinical use. Enable 802.11r (fast BSS transition), 802.11k (neighbor reports), and 802.11v (BSS transition management) — but only after confirming every clinical device supports them.
Standards
- IEC 80001-1 — risk management for IT networks incorporating medical devices.
- AAMI TIR75 — application of 80001 to wireless.
- NIST SP 800-153 — guidelines for securing wireless LANs.
- Wi-Fi Alliance WPA3-Enterprise — required baseline for new clinical SSIDs.
References & further reading
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