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

0 Bookmarks
 · 
64 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: In wireless communication, low earth orbit (LEO) satellite has become a popular name, due to their low propagation delay and low power requirements. Throughout the last few years a plenty of researches had been done to improve the LEO satellite communication by implementing several channel allocation techniques. In this paper we are going to propose a new adaptive channel allocation scheme for efficient utilization of resources (channels) for originating and handover call in LEO Satellite communication by region based analysis. We have divided the total footprint region in different sections, according to the traffic load of different spot-beams and for each section we have assigned different channel allocation techniques according to their traffic loads. This approach reduces the unnecessary complexity and unnecessary reservation of resources (channels) which in turn reduces the complexity of the communication network.
    Wireless and Optical Communications Networks (WOCN), 2012 Ninth International Conference on; 01/2012
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: In this paper satellite handover procedures are proposed for investigating the satellite diversity (namely, the existing common coverage area between contiguous satellites) of some satellite constellations in order to provide an efficient handover strategy. Based always on a tradeoff of the blocking and forced termination probabilities three different handover criteria are examined for the appropriate selection of the servicing satellite. Each criterion can be applied either to new or handover calls, therefore we investigate nine different service schemes. Extended simulation results provide a deep insight on the system operation and lead to a beneficiary system architecture.
    International Conference on Advanced Satellite Mobile Systems (ASMS); 01/2003
  • [Show abstract] [Hide abstract]
    ABSTRACT: In this paper, a stochastic reward net (SRN) model is constructed to analyze the performance of low Earth orbit (LEO) satellite networks in the case of packet loss. A lemma is proved to calculate the packet loss probability. Then, the impact of buffer size, arrival rate and packet size on packet loss probability is also analyzed using stochastic Petri net package (SPNP) 6.0. Through numerical results, some new results are derived thereby
    01/2006;