  This document is a study of fairness, feedback and stability notions of
different packet transmission algorithms. We start the discussion with defining
two scalable control algorithms namely primal and dual algorithm. We discuss
the dual algorithm model and then understand the fair dual algorithm. Further,
we discuss different notions of fairness under fair dual algorithm those
correspond to TCP and RCP congestion control protocols. Feedback parameters are
analyzed in each of these fairness algorithms and thus their stability is
studied.
