Networking and Signalling Aspects of a Satellite Personal Communications Network
A possible network architecture for the European Space Agency’s MAGSS-14 (Medium Altitude Global Satellite System) constellation is proposed and described. Network connectivity statistics are examined and a physical implementation of the ground segment control network, using 11 globally positioned gateway stations, is described. This example helps clarify the complex nature of S-PCN system connectivity and control. Using this example as the baseline architecture, an examination is made of GSM LAPDm signalling procedures over satellite. A slightly modified version of this protocol is used for these satellite network simulations. Mobility management signalling is initially examined, with a trade-off being made between location update and paging signalling allowing an optimum user location uncertainty distance to be found. User originated and terminated call setup signalling is also simulated. The results provide some useful insights into the use of modified LAPDm over satellite.
KeywordsMobility Management Late Assignment User Terminal Visitor Location Register User Cooperation
Unable to display preview. Download preview PDF.
- 1.J. Benedicto, J. Fortuny, P. Rastrilla, ‘MAGSS-14: a medium altitude global satellite system for personal communications at L-band’, ESA Journal 16,1992Google Scholar
- 2.J. Rusch, P. Cress, M. Horstein, R. Huang, E. Wiswell, ‘Odyssey, a constellation for personal communications’, 14th International communication satellite systems conference, March 1992, Washington, DC, USAGoogle Scholar
- 3.C. Cullen, ‘Network and signalling aspects of satellite personal communication networks (S-PCNs), Estec Working Paper (EWP) 1736, September 1993Google Scholar
- 4.C. Cullen, R. Tafazolli, B.G. Evans, ‘Networking and Signalling Aspects of a Satellite Personal Communications Network (S-PCN)’, 15th AIAA conference, Washington DC, USA, February 1994.Google Scholar
- 5.A. Sammut, C. Cullen, R. Tafazolli, B.G. Evans, ‘Ground Segment control network for a MAGSS-14 based satellite personal communications network (S- PCN)’, COST 227 TD(94) 01, ESTEC, January, 1994Google Scholar
- 6.ETSI/PT GSM Recommendations, March 1991Google Scholar
- 7.C. Cullen ‘LAPDm modifications for S-PCN’, Temporary internal document, University of SurreyGoogle Scholar
- 8.A. Sammut, C. Cullen, R. Tafazolli, B.G.Evans, ‘Mobility management related signalling for a MAGSS-14 based satellite personal communications network (S- PCN)’, COST 227 TD (94) 22, National Technical University of Athens, May, 19.Google Scholar