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Objectives
The scope of the ARTES 5.2 activity BeamSat is to prepare the groundwork and mitigate the risk and challenges for the development of a Ka-band satellite broadband access solution that will support high-rate broadband access to regions deprived from competitive terrestrial broadband solutions.
The main driver for this development will be the broadband market requirement and the move to Ka-band multi-spotbeam satellite technology instead of Ku-band transponders, which makes more satellite bandwidth available for broadband applications and at a significant lower cost.
Because of the available broadband capacity and performance improvements, BeamSat will also be able to support various value added services (VAS) for the consumer market: interactive television, video-on-demand, VoIP and other real-time (gaming) applications; and other professional services such as contribution and backhauling. These values added services will allow the network operator to differentiate himself on the market and run a successful network.
The main goals of the ARTES 5.2 BeamSat project are:
- To prototype key components of the system, in order to:
- Anticipate on the requirements to handle the high throughputs associated with Ka-band networks;
- Improve the QoE of the system w.r.t. current and future services and applications;
- Tackle and resolve shortcomings of the existing Ku-band broadband access system;
- Mitigate risk (performance, cost, time to market).
- To develop test tools and platforms that allow to evaluate the QoE measured on the (prototype) system.
Challenges
The key issues are:
- Low Cost of ownership for the subscriber;
- Network capacity;
- Low network capex and opex cost;
- Network scalability: support several hundred thousand of user terminals and high overall throughput;
- Optimal QoE for various services.
Plan
The project plan consists of two phases:
- Phase I – ARTES 5.2: The first phase is the technology investigation phase, in which critical research tasks will be examined and gateway and terminal prototypes will be built.
- Phase II – ARTES 3-4: The second phase will be the product development phase, in which the actual system will be built, tested and made production ready for a massive consumer market roll-out.
The project will maintain a heartbeat of 6 months, e.g. stage Ia, Ib, Ic, etc. This allows for a pragmatic development in accordance with the market requirements.
Current Status
- Stage 1d still covers topics applicable for Ka-band evolution, but focuses next to BeamSat Sat3Play on feasibility and research investigation for other RTN link technologies.
The following topics have been investigated.
- Traffic Modelling Tool prototyping (TMT) (cooperation with IBBT/PATS – University of Antwerp) to determine the probability distribution of the overall aggregated traffic in the network.
- Automated Resource Control, the control plane functions to optimize system efficiency, observe quality of service, resource allocation with fairness and observe operational limits for the satellite and the terminal.
- The Network Optimisation is an integrated tool that allows to optimise an overall network.
- Satellite Link bonding – Carrier Ethernet Switches (cooperation with IBBT/PATS – University of Antwerp).
- RF technology investigation (cooperation with INTEC –Research Department of the University of Ghent)
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- Stage 1e covered research for the following topics
- Study of algorithms and prototyping for improved TX signal pre-distortion in order to compensate the non-linearities (AM-AM and AM-PM) of the transponder. The algorithms have been successfully prototyped and are implemented in Newtec’s high speed modem product family.
They allow to perform pre-distortion for higher order modulation modes (constellations above 32 APSK) with a better performance and a significantly reduced complexity
- Research for improvements of the ACM algorithms for Newtec S2 Extensions modulation/coding schemes. These improvements have been integrated also in Newtec’s high speed modem family.
- Research and prototyping of channel status estimation algorithms and the behaviour of Newtec’s proprietary Mx-DMA HRC algorithms using saturated BUC’s at the remote site and in the presence of fading channels. This research has led to the implementation of the HRC control plane in Newtec’s Dialog product. The Dialog product is the follow-up of the Sat3Play system and covers 3 RTN link technologies (4CPM, MX-DMA HRC and DVB-S2) in a multi-service satellite communication environment
Research and prototyping of polarisation switching implementation for the ODU terminal product range.
- Stage 1f covered research for the following topics
- Study of algorithms and prototyping for improved TX signal pre-distortion on linearized transponders in order to compensate the non-linearities (AM-AM and AM-PM) of the transponder. The algorithms have been successfully prototyped and are implemented in Newtec’s DTH modulator product family.
They allow to perform pre-distortion for DTH modcods on linearized transponders with a better performance and a significantly reduced complexity
- Research for improvements on the DVB S2/S2X resulted in improved support for lower rolloff and faster acquisition on the demodulator and phase noise measurements that will be added on the professional demodulators.
- The Newtec Network Optimisation tool was extended with DVB-S2X modcods, an auto-modcod selection functionality (which automatically selects the optimal modcod for a given network configuration, be it HRC, CPM, DVB-Sx, CCM or VCM/ACM), an introduction to the concept of group CIR and group PIR adaptation to the available bandwidth and an implementation of availability balancing of FW group and RT group
- Research and prototyping of bandwidth management with the Newtec proprietary Mx-DMA HRC algorithms. This research has led to the improvement of the HRC capacity request algorithm in Newtec’s Dialog product. The Dialog product is the follow-up of the Sat3Play system and covers 3 RTN link technologies (4CPM, MX-DMA HRC and DVB-S2) in a multi-service satellite communication environment
