Published: July 2019
Wi-Fi 6 introduces powerful tools for increasing performance and efficiency, but one issue still frustrates IT teams in 2019: roaming. Even with new protocols and smarter infrastructure, sticky clients, unpredictable behavior, and performance drops during handoffs remain common pain points.
One of the longest-standing challenges in wireless networking is the “sticky client” — devices that cling to an access point (AP) far beyond the point where it’s optimal. Smartphones, tablets, and even laptops often rely on outdated algorithms to decide when to roam, prioritizing signal strength instead of throughput, latency, or congestion.
In a Wi-Fi 6 deployment, sticky clients drag down overall airtime utilization. APs may be capable of MU-MIMO and OFDMA, but if clients aren’t transitioning appropriately between APs, the network can't optimize load distribution or efficiency.
Leading enterprise vendors like Cisco, Aruba, and Mist (Juniper) began deploying AI-enhanced features in 2018–2019 to improve roaming. These include machine learning engines that monitor client behavior, adjust AP transmit power dynamically, and steer clients to better-performing APs through mechanisms like 802.11k and 802.11v.
In 2019, Cisco’s DNA Center and Mist’s Marvis virtual network assistant offered practical AI tools for managing roaming performance at scale. While not a silver bullet, they reduce time-to-resolution and bring transparency to roaming behavior patterns.
802.11r — Fast BSS Transition — is critical in Wi-Fi 6 environments, especially for real-time apps like VoIP, video conferencing, and medical telemetry. It enables fast roaming by allowing clients to pre-authenticate with nearby APs, significantly reducing the delay during handoff.
Wi-Fi 6 doesn’t inherently improve roaming without support from client and infrastructure for 802.11r. As of mid-2019, adoption of 11r remained fragmented. Some devices, like iPhones running iOS 12+, supported it well, but Android fragmentation still created gaps. Some older Android phones even experienced disconnections when 802.11r was enabled.
For deployments in hospitals, manufacturing, or warehouses, testing each device type against the WLAN is essential before enabling 11r globally.
In addition to 11r, assisted roaming protocols like 802.11k (neighbor reports) and 802.11v (BSS transition management) help clients make informed roaming decisions. These are particularly useful in voice-grade WLANs or when fast transitions are mandatory.
Vendors implement these differently. Some rely heavily on band steering and load balancing, while others use directional prompts and probe suppression to reduce congestion. But client behavior is the weakest link — the infrastructure can suggest, but clients ultimately decide when and where to roam.
Roaming in Wi-Fi 6 isn’t solved by faster speeds or new frequency bands. It still depends on cooperation between client devices, AP infrastructure, and intelligent policy tuning. In 2019, the combination of AI-driven WLAN management, 802.11r/k/v support, and proactive monitoring offers the best toolkit yet to finally tackle the roaming conundrum.
Eduardo Wnorowski is a network infrastructure consultant and Director.
With over 24 years of experience in IT and consulting, he designs Wi-Fi environments that scale with modern demands for mobility, security, and visibility.
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