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The study objectives are to:
Key issues addressed by the study include the size of the addressable market, if and how it is possible to reallocate the downstream xDSL bandwidth that is freed up by the use of the satellite channel to improve the upstream performance of the xDSL lines involved, and how the system should be designed to enable it to be incorporated easily in existing xDSL networks and managed using existing operations support and business support systems.
The main benefits of the proposed system compared to bi-directional satellite broadband platforms are that the CPE is less expensive and easier to install (because it is receive only) and that the amount of satellite capacity required for each subscriber is reduced (because the satellite channel supplements the terrestrial channel at times when high bandwidth is required rather than replacing it entirely). This may mean that the hybrid solution is more cost-effective than alternative methods of improving the performance of slow xDSL lines, such as running fibre to the cabinet to shorten the copper loop length.
The figure shows a potential diagram for the satellite extension. The key components are:
RF – Represented by the transmission antenna – top left in the figure-, is used as a name to gather all commonly used subsystems that are needed to send data to satellite: frequency converters, amplifiers, antenna etc.
The study was completed in 1Q 2014. The major activities were:
Definition of roadmap and synthesis (4Q 2013-1Q 2014)
The study has been completed and all deliverables submitted.