Opportunistic communication is receiving more and more attention as a concept that has recently revolutionized the way engineers think about wireless system design.Currently
opportunistic scheduling algorithms are studied based on many different models.Therefore
comparisons of results are sometimes difficult.This paper classifies and compares the models that have been proposed
and discuss the performance evaluation metrics
methods and results of several typical scheduling algorithms within these models.Finally
we discuss the future trends and present several topics remained to be studied in this area.