Improvement of the Performances of the Mobile Satellite Systems by Sophisticated Handover Management
Authors: Obradovic, Vladimir and Cigoj, S.
Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University
Contact: publications@comnets.rwth-aachen.de
In Proc. European Wireless (EW'99), p.p. 339-345, Munich, Germany, 1999.
Publication Date: Oct, 1999
On page(s):339-345
ISBN:
Abstract Comparing Low-Earth-Orbit (LEO) mobile satellite systems (MSSs) with terrestrial mobile communication systems it is obvious that satellite movement causes more frequent handover occurrences. For this reason the system performance generally depends stronger on the handovers management technique. This paper presents a new handover management schemes for capacity limited LEO MSSs with dynamic channel assignment (DCA). The first scheme is based on queuing of the handover requests. According to the FIFO strategy queued requests are tried to be served for a specified time period. As in LEO MSSs a handover is performed more because of geometrical reasons than because of the deterioration in the signal power, it is expected that a short time is available before connection parameters become insufficient. Although the handover queuing is already known from terrestrial systems, its application in very specific environment of LEO MSSs, which is in some aspects tremendously different from terrestrial mobile communication systems, has not been investigated sufficiently. The second proposal is to combine the queuing scheme with handover prioritisation by reservation of an amount of system resources exclusively for handover purposes. Simulation tests were carried out in order to evaluate the performance of these schemes. The results show that, in the LEO satellite systems with non-uniform traffic the system performance parameters as handover blocking probability and GoS are significantly better by systems using handover queuing and even more improved by combining with handover prioritisation. Improvement is noticeable in systems using DCA as well as in those using fixed channel assignment (FCA) strategy.
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@INPROCEEDINGS{ObCi-SatHoQueu_Wireless99,
AUTHOR = {Obradovic, V. and Cigoj, S.},
TITLE = {Improvement of the Performances of the Mobile Satellite Systems by
Sophisticated Handover Management},
JOURNAL = {Proc. European Wireless (EW'99)},
YEAR = {1999},
MONTH = {Oct},
VOLUME = {0},
PAGES = {339-345},
ADDRESS = {Munich, Germany},
AFFILIATION = {Department of Communication Networks (ComNets), Faculty 6, RWTH Aachen University},
ANNOTE = {Mobile satellite systems, Handover, Resource management, DCA, FCA,
Capacity limited, Queuing, LE},
URL = {https://www.comnets.rwth-aachen.de}
}