Connections Management Strategies in Satellite Cellular Networks [Hardcover]

This book provides a novel method based on advantages of mobility model of Low Earth Orbit Mobile Satellite System LEO MSS which allows the evaluation of instant of subsequent handover of a MS even if its location is unknown. This method is then utilized to propose two prioritized handover schemes, Pseudo Last Useful Instant PLUI strategy and Dynamic Channel Reservation DCR-like scheme based respectively on LUI and DCR schemes, previously proposed in literature.  The authors also approach a different aspect of handover problem: calls with short durations dropped due to a handover failure. We propose a decision system based on fuzzy logic Rescuing System that allows the rescue of calls with short durations facing a premature at the expense of those lasting for long durations.

PREFACE ix

ABBREVIATIONS xi

INTRODUCTION xv

CHAPTER 1. THE FOUNDATIONS OF SATELLITE NETWORKS 1

1.1. Introduction 1

1.2. Satellite orbits 3

1.2.1. Characteristics of the ellipse 3

1.2.2. Kepler’s laws 4

1.2.3. Orbital parameters for earth satellites 5

1.2.4. Orbital perturbations 7

1.2.5. Maintaining and surviving an orbit 7

1.3. Time, time variation and coverage 8

1.3.1. Geometric data 8

1.3.2. Approximation of coverage 11

1.3.3. Time interval between two successive intersatellite transfers 12

1.3.4. Time and time variation 12

1.4. Orbital paths 13

1.4.1. GEO-type systems 14

1.4.2. Elliptical systems 15

1.4.3. MEO-type systems 17

1.4.4. LEO-type systems 17

1.5. Characteristics of cellular satellite systems 19

1.6. The advl3o