Table of Contents
CEENET Workshop 2001 Satellite communications Krzysztof Muchorowski NetSat Express muchor@ids.pl
Introductory remarks
A few reasons of satellite revolution:
What is a satellite?
PPT Slide
PPT Slide
but ...
Properties of spectrum bands
Properties of spectrum bands (contd)
OK, so now let’s take a look at how a satellite is built and launched.
PPT Slide
PPT Slide
PPT Slide
PPT Slide
Business Models
Does Size Matter?
Other satellite issues (to close the topic)
Other satellite issues (contd)
Other satellite issues (contd)
(contd from previous page)
Pro-s and con-s of inclined orbit satellites
Hardware: ground segment
Antenna
Antenna (contd)
Antenna (contd)
Antenna (contd)
High Performance Outdoor Unit Antenna & RF
Compact Indoor Unit
“Go Anywhere” Package
Great Accessories for a Great Product
The Video Explorer H.320 Video Conferencing in a Briefcase
Receiving/transmitting devices
LNB properties (example)
Ku-band transceiver (example)
Amplifiers
Modems
Modem parameters
Modem parameters (contd)
Modem parameters (example)
IRD instead of a modem
Redundancy
Bit Error Rate
Bit Error Rate
Link budget
Link budget (contd)
Link Budget (example)
Link budget (contd)
Link budget (final)
Moving up one layer to layer 2...
To DVB or not to DVB?
DVB Delivers Multiple IP Services Over a Shared Satellite Link
Multicast Is Expected To Be A Major Growth Area
Multiplexed, Multicast Technology Needs Supported/Facilitated By DVB
An Content Delivery Network Incorporating DVB
A Closer Look at DVB Features
DVB Packet Format
DVB Uplink Data Flow
DVB Integrated Receiver Decoder (IRD) Structure
An Example Multiplexed Carrier
Summary Of DVB Benefits
Applications
Satellite Internet
SATNET and MFNET (some history)
USAN
ACTS
PPT Slide
Effect of propagation delay on TCP networks (very pessimistic)
Effect of propagation delay on TCP networks (more realistic)
Effect of propagation delay on TCP networks (a bit of relief)
Effect of propagation delay on TCP networks (contd)
TCP/IP Accelerator
VoIP on satellite networks
IP Voice Network
IP Voice Network
Back to satellite Internet
Bi-directional satellite Internet connections
Receive-only satellite Internet connections
Burstability
Routing (if we also have 2nd connection)
More about routing for RO links.
What is Multicast ?
The Problem with Unicast
What about Broadcast ?
Multicast the Best Solution !
Satellite is the answer to multicasting! (at least partly :-)
Some advices...
How to select a satellite Internet service provider?
How to configure a network for satellite RO service?
How to point an antenna at a given satellite?
Satellite positions in the sky in Budapest
Antenna pointing (contd.)
What will be in the future?
Conclusions?
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