Efficiency estimation of satellite telecommunication system with on-board implementation of DAMA
Keywords:satellite communication system, DAMA, on-board processing, resource allocation.
AbstractIntroduction. Satellite is often used as an access network in convergent multimedia communications, where multimedia and real-time services are supported by return channels. Demand assigned multiple access (DAMA) applied for efficient assignation of limited resource of satellite return channel. On-board signal processing gives a lot of functional benefits for satellite systems and can be used as possibility to implement DAMA mechanism on satellite.
Theory part. Simplified algorithm of dynamic resource allocation presented which is equivalent for both inside Network Control Center (NCC) and on-board implementations of DAMA. Realization of algorithm is based on information about transmission buffers load of each terminal station.
Experimental part. Imitation model of return satellite channel with DAMA was developed and tested. Average buffers load and performance of channel level were chosen as characteristics to compare systems with NCC and on-board DAMA implementation. These characteristics were measured for different available return channel capacity.
Conclusions. Experiments showed significant average buffer load reduction and 5-6% performance gain for on-board implemented DAMA model comparing to traditional realization. However, model of DAMA mechanism has drawbacks (bit representation of data, physical layer constraints are not considered for resource allocation granularity) and it should be improved for more precise results.
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Cuesta B., Albio L., Aguiar J. M., Baladrón C., Carro B. and Sánchez-Esguevillas A. (2013) Innovative DAMA algorithm for multimedia DVB-RCS system. EURASIP Journal on Wireless Communications and Networking, pp. 1–14.
Priscoli F. D., Pompili D. and Santoro G. (2004) A QoS-aware Bandwidth on Demand Assignment Mechanism in GEO Satellite System, Proc. of EU Information Society Technology Mobile and Wireless Communications Summit (IST Summit), pp. 1–5.
Le Roy Y., Prat J., Jalón A., Riba J., Sala J. and Morrison I. (2001) The Alcatel 9343 DVB-OBP Product: An On-Board Processor for Digital Television and Internet Data. Digital Signal Processing Techniques for Space Communications, Seventh International Workshop on, pp. 1–8.
Chacón S., Casas J. L., Cal A., Rey R., Prat J., de la Plaza A. R. J., Nieto C. M., Piñar F. J. R. (2001) Multimedia applications of the integrated broadcast interaction system (IBIS). Digital Signal Processing Techniques for Space Communications, Seventh International Workshop on, pp. 1–8.
Priscoli F. D. and Pietrabissa A. (2002) Resource management for ATM-based geostationary satellite network with on-board processing. Computer Networks Journal, Vol. 39, No. 1, pp. 43-60.
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