Wi-Fi Passpoint standard now knits together SF, San Jose, London

Backers of Passpoint envision consumers moving from one Wi-Fi network to another wherever they go, in the same way they automatically roam among cellular carriers today. But Wi-Fi network operators are just beginning to activate the technology, which can require new or modified infrastructure. Worldwide, there are 12 live commercial deployments of the underlying technology, called Next Generation Hotspot, according to the Wireless Broadband Alliance.

The grouping of the Thames network with San Francisco's and San Jose's is no accident. All three networks use infrastructure from Ruckus Wireless and back-end technology from Global Reach, a Wi-Fi software and services company in London. But with Passpoint, networks that want to offer roaming among them don't all have to use the same vendors, according to the standard's supporters. San Francisco CIO Miguel Gamino says the city was approached by people from the Thames network and that other municipalities have also asked about joining in, Gamino said.

Using Passpoint across oceans and borders is no great technical feat, said Farpoint Group analyst Craig Mathias. But that doesn't mean universal free Wi-Fi will take the place of expensive cellular roaming.

"If we wanted to connect the whole world into Passpoint, we could," Mathias said. But where the technology is the same everywhere, the way services are packaged and paid for will vary, he said. Carriers, network operators and hotspot aggregators will continue to compete as they do now, sometimes with free access and sometimes with paid. "You'll see all kinds of hybrids," Mathias said.

One limitation of the roaming setup is that the fully streamlined user experience is only available on AppleApple iOS and OSX devices, according to Ruckus. Users can easily go from one network to another on some Samsung devices, too, but only those with SIM cards, said David Wright, technical director for Ruckus's carrier business. With non-SIM devices such as tablets, the process is more complicated. That's because OS support is still limited: Passpoint is included in iOS but not yet in Android or Windows, Wright said. Alles zu Apple auf CIO.de