DocumentCode :
2653790
Title :
Advanced Power Control and Handover Algorithms for Mobile Satellite Communications Systems with Ancillary Terrestrial Component
Author :
Kim, Byoung-Gi ; Lee, Seung Min ; Kang, Kunseok ; Ahn, Do-Seob
Author_Institution :
Div. of Radio & Broadcasting Res., Electron. & Telecommun. Res. Inst.
fYear :
2007
fDate :
22-25 April 2007
Firstpage :
1420
Lastpage :
1424
Abstract :
In this paper, modified power control algorithms are proposed for a satellite mobile communications system with ancillary terrestrial component (ATC). In order to increase system capacity and reduce the transmitting power of the user´s equipment, we propose the modified power control scheme consisting of the modified closed-loop and open-loop power control. The modified closed-loop power control (CLPC) algorithm, combining the delay compensation algorithms and pilot diversity, is mainly applied to the ATC link in urban areas because it is more suitable to the short round-trip delay (RTD). In the case of rural areas where ATCs are not deployed or a signal is not received from ATCs, combining monitoring transmitting power equipment and open-loop power control (OLPC) algorithms using an efficient pilot diversity is mainly applied to the link between the user´s equipment and the satellite. Two power control algorithms are applied equally to the boundary areas where two kinds of signals are received in order to ensure coverage continuity. The simulation results show that the modified power control scheme has good performance compared to conventional power control schemes in a geostationary earth orbit (GEO) satellite system with ATC.
Keywords :
closed loop systems; mobile satellite communication; open loop systems; power control; telecommunication control; GEO satellite system; advanced power control; ancillary terrestrial component; closed-loop power control; delay compensation algorithms; geostationary earth orbit satellite system; handover algorithms; mobile satellite communications systems; open-loop power control; round-trip delay; Artificial satellites; Delay; Diversity reception; Earth; Monitoring; Multiaccess communication; Power control; Satellite broadcasting; Satellite communication; Telecommunication standards;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
ISSN :
1550-2252
Print_ISBN :
1-4244-0266-2
Type :
conf
DOI :
10.1109/VETECS.2007.297
Filename :
4212725
Link To Document :
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