|Towards the Personal Communicator (http://www.satcom.co.uk/article.asp?article=6)|
|The pages which follow are the slides of a short lecture
presented to the Surrey Section of the IEE (the IEE is the British Institution of Electrical
Engineers) by Mark C J Posen of RPC Telecommunications Ltd.
The slides were created using Microsoft PowerPoint and converted to HTML. During conversion the 38 slides were combined into 7 sections.
You can navigate between these sections at will from the left hand side. However, bear in mind that for the slides to make the most sense, it is suggested that you read through them in order.
Please note that this presentation contains the lecturers notes, and so in some places are not complete. If you have any questions regarding these lectures please contact the author here.
"Beam me up Scottie"
Hello. As you've heard, I'm Mark Posen of RPC Telecom. I'm very pleased to have the opportunity to talk to you about one of the most exciting developments in satellite telecommunications for a long time.
I was involved in Satellite Personal Communications, albeit in a relatively peripheral role, from the early days. I lead the project team of ETSI which studied the early proposals and identified where standardisation and regulation was needed in Europe to facilitate the free movement of equipment through the Union and to ensure that European regulatory requirements were met. I'll speak for around 45 minutes and then we'll have some time for questions.
"Beam me up, Scottie!" The pocket-sized personal communicator has long been the stuff of Sci-fi...
First a question. What do these people have in common?
They need Personal Communications!
PP Presentation Outline
So, what is "Personal communications"?
-"Universal Service Concept"
Concept (3): S-PCN
-Satellite based (enhanced) network
-Hand held terminal / direct access
Concept (4) - Hand Held Terminal
-Main limitation on network design
-Multi-mode for better network integration
Concept (5) - Choice of Orbit
-Does the orbit really matter?
-Clearly pros and cons for different orbits
-No consensus amongst designers!
Digression - Orbit Mechanics!
Orbit Mechanics (2)
Orbit Mechanics (3)
-Combine orbits into "constellations"
Concept (6) - Network Configuration
-There is no "typical" S-PCN configuration
-Some things to be considered:
We'll not try and answer these now but will look at specific proposals...
We'll focus on three specific examples
Bear in mind some of the key issues:
Iridium (2) - Handset
Iridium (3) - Satellite
Iridium (4) - Network Overview
Iridium (5) - Crosslink Routing
-Call routing across and along planes
-Proposal of INMARSAT - International Mobile Satellite Operator
ICO (2) - Constellation
ICO (3) - Constellation Coverage
ICO (4) - Satellite Coverage
-Coverage from a single satellite
ICO (5) - Satellite
ICO (6) - Network Configuration
Globalstar (2) - Network
Globalstar (3) - CDMA Soft Handover / Redundancy
Globalstar (4) - Coverage
Implementation & The Future
When is this all going to happen? - Very soon! · First generation systems due for launch before 2000. Next generation systems by 2010
-Follow-on systems already on the drawing board
-Movement towards "Global Bandwidth on Demand" rather than simple cell phone replacement.
Questions? And now some time for questions...
If you have any questions on this lecture you can contact us here.
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Copyright 2002 Satcom Online (http://www.satcom.co.uk)