I was thinking (ruh roh) about a string of relay stations set along the way between Earth and Mars. Then I considered the different rates of orbit, the sun getting in the way...but that's a start.
And I meant human interface for tasks where the time lag wasn't a large factor, things requiring decision-making that you don't want to leave to an unfeeling automaton. Mark Zuckerberg has enough to do here, anyway.
Well if there where a lot of them, they could mitigate the Sun problem. Or they could move the Sun out of the way - either would work. 😎