Conference Paper

A channel reservation algorithm for handover issues in LEO satellite systems based on a satellite-fixed cell coverage

Lab. PRiSM, Univ. de Versailles
DOI: 10.1109/VETECS.2001.944147 Conference: Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd, Volume: 4
Source: IEEE Xplore

ABSTRACT In this paper, we propose a channel reservation mechanism referred
to as time-based channel reservation algorithm (TCRA). The aim of TCRA
is to handle the handover issue in low Earth orbit satellite networks.
These systems face an important number of handover attempts due to the
high satellite velocity when placed in low orbits. The TCRA scheme uses
the deterministic satellite movement pattern to estimate the user
residence time in each cell to be crossed. Two versions of the algorithm
are proposed depending on whether the network disposes of a positioning
system or not. These versions of TCRA allow to guarantee a null handover
failure probability for the users. The performance of TCRA (with its two
versions) is examined by simulations and compared to the guard channel
scheme. The results show the behaviour of the schemes and their
performance in terms of new call and handover blocking probabilities

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