Originally posted by: Modelworks
ok, show me how any satellite broadband has low latency ?
Damn, that speed of light thing always getting in the way.
No dispute about latency whatsoever.. 86k miles is a long way! Actually, any link that has >= 600ms of latency, even with a 64k TCP window size, won't go any faster than ~900kbit/s in a single TCP session. Selective acknowledgements help somewhat, as would a larger window size, but that's a limitation of the protocol. You can parallelize TCP sessions to overcome that, but it's less than ideal and usually requires specialized software on the part of the client that is largely frowned upon by most server admins. This is why proxy servers are often employed in conjunction with satellite uplinks as well.
Now, for voice communications (usually carried via UDP), it's another story -- which is what I would refer to for some of these projects I've done. People that say voice over Satellite is inferior are just at odds with themselves over common sense. A GSM call that traverses two disparate GSM networks runs 600ms from phone to phone.
Regardless, Wifi (and friends) really is just a downsized version of SCPC VSAT, with reduced distance and power requirements. RF engineering hasn't changed significantly in 60 years, only what is carried and the amount of spectrum used.