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Capacity would be a huge problem though, even with 5000 satellites, if you wanted to rival fixed-line or cellular wireless networks for a significant part of th
by stephen_g 9y ago
Capacity would be a huge problem though, even with 5000 satellites, if you wanted to rival fixed-line or cellular wireless networks for a significant part of the world's population...
To put that in perspective, in Australia we have 13,400 cellular towers [1], with an extra 9,000 proposed to be built, to cover just 26.3 million subscribers [2]. This is to deliver 2.8% of the data downloaded over the last year (97.2% having been delivered over fixed line) [2].
So, with an LEO constallation, you might have a few dozen satellites over the populated parts of Australia at any one time, each of which has a finite amount of capacity (both uplink/downlink spectrum and capacity back to the ground station) shared between all the users.
I think this network could see a massive benefit for rural areas, developing countries, maritime markets, etc. but to think that the network would have the capacity to deliver anything rivalling cellular networks in metro/suburban areas to most subscribers is very far fetched.
1. https://oztowers.com.au/Statistics https://oztowers.com.au/Statistics
2. http://www.abs.gov.au/ausstats/abs@.nsf/mf/8153.0 http://www.abs.gov.au/ausstats/abs@.nsf/mf/8153.0
- ehnto 9y agoThat is actually surprisingly low. How many of those towers are due to georgraphic constraints rather than capacity constraints? Each town tends to have its own tower, and then a tower often exists between towns to fill dead spots. I can get 3g or 4g from almost the entire length of my state, and I can imagine in a few of those spots it's just me and a handful of others that are connected.
- strictnein 9y agoFrom the link: > a 2015 proposal from Samsung has outlined a 4600-satellite constellation orbiting at 1,400 kilometers (900 mi) that could provide a zettabyte per month capacity worldwide, an equivalent of 200 gigabytes per month for 5 billion users of internet data