MUMBAI: Vodafone, Telefónica, Orange, and 3UK have announced the results of their successful joint technical trial of TDtv in the US.

TDtv is the UMTS TD-CDMA-3GPP Multimedia Broadcast and Multicast Services (MBMS) standard for mobile television solutions. The trial provided insights into the technology’s capability and successfully demonstrated how existing spectrum can be used to deliver mobile television and other multimedia services.

The participants are now discussing next steps and exploring how the findings from the trial could be used to develop commercial models.

Key Trial Results

• Reliable delivery of mobile TV services using TDtv technically viable

• Up to 11 to 14 high quality channels can be delivered in 5MHz of TDD spectrum

• Coverage comparable to WCDMA but using fewer cell sites

• Performance consistent when moving at speed

• Dual mode handset viable

The TDtv trial, announced in October 2006, aspired to test key performance and deployment aspects of the mobile TV technology. Covering a large area of Bristol in the UK using only 12 macro-cell sites, the trial proved that the technology has the ability to offer reliable television delivery at the data rates that are needed to provide high quality mobile TV services.

The trial showed that eleven high quality channels could be delivered across the service area, with the potential to deliver up to fourteen channels with planned future technology developments. Significant coverage gains were demonstrated when using key TDtv performance enhancement technologies including macro site combining and receive diversity in the user device. The gains from these technologies demonstrated in the trial indicate that TDtv may be able to provide the same coverage as WCDMA when deployed on 35% of the WCDMA sites.

TDtv also proved its ability to perform at motorway speeds during the trial, allowing it to address a wide range of use cases such as when travelling on a train.

Initial coexistence testing to explore the simultaneous operation of 3G FDD and TDD also proved the theoretical viability of a dual mode WCDMA/TDtv handset.

Finally, the TDtv network also proved very reliable with 99 per cent availability during the trial.

Professor Michael Walker, who is the director of research and development at Vodafone said, “Trials are an extremely important part of our strategic product development and help us build a comprehensive understanding of how the technologies work and the customer experience they will offer. The outcome of this trial will help us evaluate the commercial potential of TDtv as part of the MBMS assessments we are undertaking.”

Telefónica Móviles Espa?a MD Technology and Services Cayetano Lluch Mesquida says, "The TDtv trial in Bristol has proven the ability to effectively use our unused TDD spectrum for a wide variety of Mobile Broadcast Services and the potential of a SFN deployment to support impressive coverage gains.

” Nevertheless, we would like to see the next steps taken to ensure a wide variety of terminals and interoperable services are available for the platform.”

Orange executive VP, IT Networks and product support Vivek Badrinath said, "We are committed to fuelling the growth of mobile TV by ensuring our customers are offered the best quality and content now and in the future. The TDtv trial forms an important part of our research into potential technology solutions for the future, equally important is the collaboration of other industry players, who are now working together to learn and build from our shared experiences."

3UK CTO David Cooper said, "3 is pleased to support this initiative. The results of this first trial demonstrate TDtv has the potential to deliver a mass market Mobile TV solution. As the first network to launch 3G services in Europe, we‘re always looking at ways to develop the service we offer customers."