1. A method, said method comprising: retrieving a sparseness indication; retrieving an indication of a number of failed transmissions; comparing said sparseness indication to an optimal sparseness; comparing said number of failed transmissions to a first threshold; adjusting a size of a set of triggering events responsive to both said first and said second comparison; comparing a data buffer push rate to a data buffer arrival rate; further adjusting said size of said triggering set responsive to said third comparison; determining system fairness; comparing said size of said triggering set to a second threshold; and further adjusting said size of said triggering set responsive to one of said determination and a combination of said determination and said fourth comparison.