Trafcmatrix(TM)canbeusedtodetect,identify,andtracenetworkanomalycausedbyDDoSattacksandwormoutbreaks.Todetectnetworkanomalyasearlyaspossible,weneedtoobtainTMinafastandaccuratemanner.ManyexistingTMestimationtechniquesarefoundnotsufcientforthispurpose