Optimum power and beam allocation based on traffic demands and channel conditions over satellite downlinks

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For data services over satellite networks, the efficient management of satellite downlink communication resources is crucial for economic competitiveness of the medium. To support a broad spectrum of users with small terminals at high rates, narrow transmit spotbeams; on the satellite will be used. Since satellite transmitter resources are expensive and there can be many spotbeam-coverage cells within the satellite service area, it is attractive to use some form of agile scanning beam system and to time-share these precious resources. An optimized design of the multibeam antenna pattern and scheduling can further improve the efficiency of transmission and power management. In this paper, the advantage of parallel multibeams in terms of spectral efficiency and power gain is shown, and the issue of multibeam power allocation based on traffic demands and channel conditions over satellite downlinks with power and delay constraints is addressed. The study indicates that the use of a parallel multibeam scheme with optimum power allocation can achieve a substantial power gain and reasonable proportional fairness. By coupling power allocation with multibeam scheduling when the number of active beams is smaller than the number of cells, the authors show that a modest number of active parallel beams are sufficient to cover many cells efficiently.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2005-11
Language
English
Article Type
Article; Proceedings Paper
Citation

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v.4, no.6, pp.2983 - 2993

ISSN
1536-1276
DOI
10.1109/TWC.2005.858365
URI
http://hdl.handle.net/10203/280858
Appears in Collection
AE-Journal Papers(저널논문)
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