A seamless handover

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, a supplier of Unlicensed Mobile Access (UMA) technology, have combined two technologies that will facilitate the rapid delivery of mobile and fixed Internet Protocol Multimedia Subsystem (IMS) services across a broadband Wi-Fi access network.

The companies demonstrated several IMS-based applications using UMA technology to show the seamless handover between mobile and Wi-Fi access networks.

IMS is the open, standardised IP multimedia and telephony core network specification for mobile and fixed operators that is defined by 3GPP (3rd Generation Partnership Project).

UMA is the 3GPP global standard for Mobile/Wi-Fi convergence that enables mobile subscribers to roam and handover between cellular networks and WLANs using multi-mode mobile handsets.

The demonstration consisted of Infineon’s IMS client for mobile phones, operating with Kinteo’s UMA client on a GSM/GPRS/EDGE-WiFi handset platform. The demonstration showed how UMA provides session continuity of IMS-based presence and push-to-talk applications when the handset platform passed between a live GPRS network and Wi-Fi connection.

With UMA, mobile phone users of media-rich IMS services can benefit from the higher speed and lower latency of Wi-Fi access networks to achieve improved performance.

Infineon offers a fully portable IMS client embedded in mobile phone terminals, which is also integrated into the APOXITM (Application Programming Object-Oriented Extendable Interface) application framework and is optionally part of Infineon’s multimedia reference design platforms.

“UMA was created so that mobile operators could deliver all current and future services, including IMS over Wi-Fi and IP access networks. This demonstration highlights how UMA enhances and fully supports IMS services,” said Mark Powell, Vice President and Co-Founder of Kineto Wireless.