When Deutsche Telekom CTO Olivier Baujard took the keynote stage at the Broadband World Forum in September, he proclaimed this to be the prime time for Wi-Fi/cellular integration.

His reasoning? Ninety percent of mobile device traffic actually originates from home or work, while only about 10% takes place while users are in transit. So if users are sitting in their offices or a very nearby coffee shop, shouldn't they be able to offload traffic onto optimized Wi-Fi networks?

Deutsche Telekom and other carriers seeking congestion relief would like to answer that question with a resounding “yes.” And the same goes for most major enterprises that would like to enable users to walk out of their offices to a local coffee shop and seamlessly roam between cellular and Wi-Fi networks.

Yet in most cases,