Friday 14 May 2010

Satellite navigation and communication


The European Commission supports through R&D programmes, the development of applications and services based on GNSS, the global navigation satellite system, a system that will be completed with Galileo in some years time (2013).

Potential applications and services exist in many areas ranging from road traffic to air traffic and from people finding to commercial location based publicity. An example is the Liveline project. A problem that is often neglected is the fact that these applications often require, next to a good position determination, a wireless communication path that connects a mobile unit to an application server. This wireless communication path is supposed to exist. For short range data communication, one can use a WLAN communication system. For long range data communication, the mobile telecommunication operators are supposed to deliver the solution.

But is this really true? There are still many issues. First, in the countryside, you still have ordinary 2nd generation GPRS communication. Basically, the best communication speed you can achieve is 56 kbit/s, the speed of a classical telephone line. The new generation data communication systems take much more time than anticipated 10 years ago. Secondly, data communication abroad still costs a fortune. The roaming charges for data communication are still too high for many applications to be economically viable. I also refer to a previous blog about internet access.

To summarise, the GNSS applications and services require a more holistic approach. Moreover, the mobile telecommunication operators need to become more involved with the Space - GNSS community of service providers. Today, they are either not interested in this emerging market, or they go their own way. S-band hybrid terrestrial - satellite communication could offer an alternative solution in some years time, but not tomorrow.

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