SpaceX has been developing sat to sat links, but in the current system a majority of traffic just goes up and down like a bent pipe. However because of the speed the sats move the system needs to know the location of all endpoints in real time. A given sat is only visible to a base station for something like 90 seconds. So it's very different from traditional GEO services, or even MEO services like Iridium et all for that matter.
SpaceX has been developing sat to sat links, but in the current system a majority of traffic just goes up and down like a bent pipe. However because of the speed the sats move the system needs to know the location of all endpoints in real time. A given sat is only visible to a base station for something like 90 seconds. So it's very different from traditional GEO services, or even MEO services like Iridium et all for that matter.