Hospitals are the hardest buildings I have ever surveyed. Hospital Wi-Fi design has to serve clinicians, patients, and medical devices at the same time. However, the building itself fights the signal at every turn. Over the years, I have walked sites from small rural hospitals to large urban campuses. Consistently, the same problems keep showing up.
Construction That Fights the Signal
Hospital walls are not normal walls. Lead lined walls surround imaging rooms. Concrete and steel fill the stairwells and elevator cores. Furthermore, patient rooms often have metal headwalls packed with gas lines and cabling. As a result, a signal that looks strong in the corridor can vanish at the bedside.
For example, I once measured a 25 dB drop between a corridor and a room beside an X-ray suite. Therefore, every hospital needs a proper RF survey. A predictive model alone will not catch surprises like that. Renovations add to the challenge. New walls and equipment change the RF environment, often without anyone telling the network team.
Survey data also guides where access points go. In many hospitals, ceiling mounted units sit above hard lid ceilings or inside fire rated plenums. Consequently, the signal has to travel through material that was never meant for radio. We often move units into corridors or patient rooms instead. As a result, coverage improves and the design uses fewer access points overall.
Roaming for Clinical Devices
Nurses walk all day with phones, tablets, and workstations on wheels. Each device must roam cleanly between access points. Specifically, voice calls need a handoff in well under 150 milliseconds. Poor roaming shows up as dropped calls and frozen charting screens.
In practice, most of these complaints trace back to sticky clients and mismatched power levels. Access points that transmit louder than the devices can answer create one way coverage. Consequently, we tune transmit power to match the weakest client. Additionally, we raise minimum data rates so devices move to the nearest access point sooner. Then we walk the floors with a test phone to confirm the result.
Medical Devices and Interference
Infusion pumps, patient monitors, and telemetry units all share the network. Many of them still run on 2.4 GHz. Meanwhile, microwaves, Bluetooth headsets, and patient phones crowd that same band. Indeed, interference on 2.4 GHz is the most common fault I find in healthcare.
These devices can affect patient care, so reliability matters more here than almost anywhere. That said, good design can separate the traffic. Put clinical devices on a dedicated SSID and VLAN. Keep guest and staff traffic on their own networks. Also, move every device that supports 5 GHz or 6 GHz off the crowded band.
Privacy, Security, and Growth
Canadian hospitals protect personal health information under provincial laws such as Ontario’s PHIPA. Therefore, wireless security is a compliance issue as well as a technical one. Specifically, WPA3 Enterprise with certificate based authentication protects clinical data well. Moreover, segmentation limits the damage if a guest device is compromised.
Capacity planning deserves attention here too. A single patient room may hold a monitor, a pump, a tablet, and two personal phones. Specifically, that is five or more devices per bed. Multiply that across a full ward and the airtime demand adds up fast. Therefore, we size every design by device count, not by floor area alone.
Finally, plan for growth. Hospitals add connected devices every year. Capacity matters as much as coverage, so design for the load you will have in five years.
Overall, good hospital Wi-Fi comes from surveying first, designing second, and validating after installation. Baiden Group provides Wi-Fi design, RF site surveys, troubleshooting, and managed Wi-Fi for healthcare environments across Canada. In addition, we can survey again after renovations so your network keeps pace with the building.
Have questions about how these developments affect your network? Reach out to the Baiden Group team.