SADISOPSG/9-WP/25

27/4/04

SATELLITE DISTRIBUTION SYSTEM OPERATIONS GROUP (SADISOPSG)

NINTH MEETING

Dakar, Senegal, 1 to 4 June 2004

Agenda Item	5:	Development of the SADIS

PROPOSALS FOR IMPLEMENTATION OF SADIS 2G OPERATIONNAL NETWORK THROUGH EXISTING AERONAUTICAL SATELLITE NETWORK

(Presented by ASECNA)

SUMMARY
This working paper present ASECNA's technical proposals for implementation of SADIS 2G Network using File Transfer Protocol (FTP) through AFISNET existing network.

1.	INTRODUCTION

1.1	This working paper present ASECNA's technical proposals for the implementation of a SADIS 2G network based on the use of a minimum of complete stations and the broadcasting capacities of data SADIS by File Transfer Protocol (FTP) through the existing AFISNET Aeronautical telecommunications network per Satellite. The issues is to optimise the use of the existing means of telecommunications, to reduce the costs of implementation, improve the availability and the continuity of data reception, increase remote control and monitoring capabilities for operating and maintenance of the SADIS network.

2.	DISCUSSION

2.1	Taking into account the difficulties encountered since year 2001, for the supply receivers SADIS of help, the ASECNA tried out the use of net AFISNET of aeronautical telecommunications by satellite which supports, the AFTN and the GTS, for the diffusion of SADIS operational data towards the centres of Bamako, Bangui and Nouakchott. Indeed, of FTP channels were configured starting from system SADIS of Dakar, to the centres of Bamako and Nouakchott, and from system SADIS of Niamey, to the centre of Bangui. At the local level , the SADIS systems are also be integrated into the local area network to share data's with the other reception system of weather data such as AMSS, MSG station, etc, and ensure the global availability of the operational data. Following the success of this experience, the 15 SADIS stations were interconnected through AFISNET Network. For that, FTP channels were be set up to ensure the continuity of the service in the event of breakdown of the transmission system without shortcut for the users. The implementation of this solution allowed to reinforce the availability total of data SADIS with the ASECNA.

2.2	To optimise the average networks resources available, the supervision and the remote maintenance capabilities have been also implemented with success from main regional centres to the different SADIS stations through AFISNET network.

3.	CONCLUSION

3.1	Following of this experience, the ASECNA proposes to implement a network SADIS 2G, composed of a minimum of 2 way SADIS 2G completes stations and to ensure the diffusion of the data towards the other stations by FTP channels through AFISNET network.

3.2	Fort of the results so obtained the implementation SADIS 2G network should provide sustainable, operational, technical and financial benefit from the Member States concerned.

3.3	The integration of sub-regional VSAT aeronautical networks into AFI region such as recommended by conclusion 14/12 of APIRG 14 witch will be started by the consolidation of satellite services into the same satellite INTELSAT 10.02 on September 2004 for AFISNET network, offer an opportunity to define gradually a regional strategic plan for the implementation of SADIS 2G Network into the AFI region.

4.	ACTION BY THE SADISOPSG

4.1	The SADISOPSG is invited to:

a)	note the information included in this paper;

b)	examine the opportunity of the implementation of SADIS 2G NETWORK into AFI region;

c)	note the willingness of ASECNA to provide its expertise in the SADIS NETWORK Diffusion capability to each members states interested; and

d)	recommend that ASECNA's solution for the implementation of SADIS NETWORK system, be reflected in the report of the meeting.

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SADISOPSG/9-WP/25

Appendix

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