The Number continuity service, Part I GSM <-> Satellite phone

Authors

  • Arnaud Henry-Labord`ere HALYS, Paris, France and PRISM-CNRS, Versailles, France

DOI:

https://doi.org/10.13052/jcsm2245-1439.143

Keywords:

GSM<->CDMA (IS-41), GSM<->WiFi

Abstract

Mobile Number Portability is now a widely used service allowing users to keep their number if they change their subscribed operator. It was first deployed in Hong-Kong (1999). « Number Continuity » corresponds to the same service but with the switch to another technology, because the subscribed main terminal does not have coverage. The new terminal may be a PC, a smartphone / WiFi, a “satphone”, a GSM phone if the main one is CDMA, with (almost) the same service transparently. Making calls or SMS with its normal CLI shown, receiving calls, SMS, MMS to his normal GSM number (unlike « Skype »). This article explains the GSM <-> satphone number continuity implementation. The Geostationnary and Low Earth Orbit characteristics are presented as well the consequences of orbit drifts for which the exact computation is given based on the formal integration of Kepler's area law. The handover implementation and cases for the satellite service are explained. The constellation and services of the main satellite operators are compared. The telecom core network implementation of the service is detailed in the cases of a GSM type core network and an IS-41 (CDMA) core network.

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Author Biography

Arnaud Henry-Labord`ere, HALYS, Paris, France and PRISM-CNRS, Versailles, France

Arnaud Henry-Labord`ere is a graduate engineer from Ecole Centrale de Paris (1966), Ph.D. (Mathematics, USA, 1968). He was professor of Operations Research at Ecole Nationale des Ponts et Chauss ́ees during 25 years, as well as at Ecole Nationale des Mines de Paris. He is currently Visiting Professor at Prism-CNRS. He started at IBM research (1967) and founded three companies: FERMA (voice mail systems in 1983), Nilcom (first SMS network in 1999) and currently Halys (telecom equipments). He is the author of eight books (six in maths, two in telecoms) and has been granted 85 patents.

References

P. Nicopolitidis, M. S. Obaidat, G. I. Papadimitriou, and A. S. Pomportsis. Wireless Networks, Chap. 7, Wiley, 2003.

X. Lagrange, P. Godlewski, S. Tabbane. R ́eseaux GSM-DCS, Chapters 5 and 10 (“Hand-over”), Herm`es, 1997.

Wolfram Mathematica website, integrals.wolfram.com (Note: this gives a real value function only for|e|>1).

A. Henry-Labord`ere. Virtual Roaming Systems for GSM, GPRS and UMTS, Wiley, 2009.

Maurice Roy. Mcanique, Vol. I Corps Rigides, Vol. II Milieux continus, Dunod, 1965 (inparticular, Vol. I, pp. 62–65).

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Published

2013-02-25

How to Cite

1.
Henry-Labord`ere A. The Number continuity service, Part I GSM <-> Satellite phone. JCSANDM [Internet]. 2013 Feb. 25 [cited 2024 Nov. 24];1(4):349-76. Available from: https://journals.riverpublishers.com/index.php/JCSANDM/article/view/6123

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Section

Articles