Tristan Henderson’s Approach
•Suggest we model it as a mix
•Sender pays based on ingress rate and ...
•Receivers pay based in share -
•Estimate #of receivers periodically
•Period is based on statistics of type of session (have lots of studies of games, movies, music “holding times”) http://www.cs.ucl.ac.uk/staff/t.henderson
•Assume there’s a pay per content too, so sender already has feedback channel to count receivers  - could be RTCP based or PGMcc or PIM-SSM ...