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September 05, 2004

GSM over Wi-Fi

A consortium of companies including several major phone carriers and mobile phone manufacturers has released a specification for what they are terming Unlicensed Mobile Access (UMA), allowing mobile phone roaming over "unlicensed" radio technologies such as Wi-Fi and Bluetooth. Such a system would allow a Wi-Fi- or Bluetooth-equipped mobile phone to switch from a GSM WAN to a Wi-Fi or Bluetooth access point within a building where the GSM signal does not penetrate transparently mid-call. The call would be routed over TCP/IP via Wi-Fi or Bluetooth to the wired phone network, just as conventional mobile phones are. That would allow phones to roam within a large building that cannot get normal mobile phone signals but does have a Wi-Fi network installed.

The UMA Technology group has made the spec available on their web site, but claims that it has not done a full patent review of possibly conflicting 3rd party patents. Member companies have committed, however, to licensing any necessary patents they hold under "reasonable and non-discriminatory" terms.


Posted by yatta at 10:50 PM