TCRA: A Time-based Channel Reservation Scheme for Handover requests in LEO satellite Systems

Lila Boukhatem (1) , André-Luc Beylot (2, 3, 4) , Dominique Gaïti (5, 6) , Guy Pujolle (1)

1 RP - Réseaux et Performance
2 IRIT-RMESS - Réseaux, Mobiles, Embarqués, Sans fil, Satellites
3 Toulouse INP - Institut National Polytechnique (Toulouse)
4 TéSA - Télécommunications Spatiales et Aéronautiques - Telecommunications for Space ant Aeronautics
5 OASIS - Objets et Agents pour Systèmes d'Information et Simulation
6 LM2S - Laboratoire Modélisation et Sûreté des Systèmes

In this paper, we propose a time-based channel reservation algorithm (TCRA) suitable for handover and call admission control procedures in future mobile satellite systems. These systems are characterized by a high rate of handover attempts which can degrade significantly their performance. Therefore, we propose TCRA, a scheme which guarantees a null handover failure probability by using a channel reservation strategy in the cells to be crossed by the user. The performance of TCRA has been compared to the guaranteed handover (GH) scheme. The TCRA reservation method has the advantage of a better channel utilization by locking the resources only for their expected time of use. A mathematical model has been developed for both schemes, and its results have been validated through simulations.

Domaines: Informatique mobile

Lila Boukhatem, André-Luc Beylot, Dominique Gaïti, Guy Pujolle. TCRA: A Time-based Channel Reservation Scheme for Handover requests in LEO satellite Systems. International Journal of Satellite Communications and Networking, 2003, 21 (3), pp.227-240. ⟨10.1002/sat.739⟩. ⟨hal-01151234⟩