Random D/Cs

on Reach no matter what game mode i randomly get disconnected from xbox live this is really annoying me as 1. you get penalised as a quitter even though you cant help these disconnects and 2. this is the only game i own that randomly disconnects me from xbox live what i was wondering was . … is there anyway to fix this prooblem or am i stuck unable to play reach online because of this… my nat type is open and dit claims to be no network problems … can anyone help?