Beam us up Rupert!
This is a discussion on Beam us up Rupert! within the Sky Broadband help forums, part of the Sky Broadband help and support category; Given that Sky TV is satellite-based whats the prediction for satellite-beamed broadband dataflow?- or is that already happening? - and ...
- 29-09-06, 05:29 PM #1
Beam us up Rupert!
Given that Sky TV is satellite-based whats the prediction for satellite-beamed broadband dataflow?- or is that already happening? - and would BT end up controlling that anyway?
- 29-09-06, 05:47 PM #2
its available, but the problem is the upstream connection, satellites dont "upload", therefor you need another connection to upload with.
- 29-09-06, 05:48 PM #3
Not only that when it pours down with rain you get the same problems as you do with Sky bye bye signalRay
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- 30-09-06, 12:29 AM #4
>satellites dont "upload", therefore you need another connection to upload with.
Not strictly true - there are, or have been domestic rooftop downlink/uplink systems available, but at rather more cost than makes current sense for home use - unless you really need broadband at a remote location, as described
- 30-09-06, 01:27 PM #5
It is being planned for those in remote areas ect but when I've no idea.It was meant to be released sometime last year accordint to my old boss.
- 30-09-06, 06:37 PM #6
There's a reason why data links still use undersea cables...
IP over sat is not suitable for home use unless absolutely no other options are available. People complain about 10ms extra latency for interleaving on high-speed lines, now imagine the >2 seconds latency inherent in most satellite links - not just the time taken for data to make the round trip from earthstation to geosynchronous orbit, 36,000 miles up, back down to the customer but also in the multiplexing needed to serve thousands of users from a single stream.
TCP/IP just can't work reliably under such circumstances (not least because of the need to acknowledge every packet received). Hybrid systems, using sat links for downstream and analogue voice lines to a local ISP for the upstream, alleviate a lot of those problems. They're still very, very expensive though - as amazing as the amount of data a modern sattelite can transmit is, it's still probably not capable of passing more than a gigabit a second in total - so that's a thousand average broadband users, or 50,000 if you use BT's 50:1 contention standard for home users - so Sky would need to launch *100* new birds just to provide data services to their existing users (as opposed to the three used to deliver Sky Digital amongst other services), which wouldn't come very cheap at all...