It's called dropping. Sometimes it happens for no reason in RUSE because it's a fairly buggy game but if it's consistent then I imagine it must be a fault at your end.
Also, sometimes RUSE seems to have "rough days" where it wants a day off and some tender, loving care - that is, when it seems to drop you every other game. It seems to right itself again though.
Also, if steam goes down or if steam has issues then RUSE multiplayer will too.
Yeah i got this last 2 weeks very very much problems! also 3 other friends of me!
-Ranked matches does'nt work.
-Players get kicked before a game starts.
-Players get kicked in game cause of: connection/ping problems.
-Players have 2 or more De-Sync games !!! THIS IS A BIG BIG PROBLEM !!!
(means that you have a other game then your mate. however you still can chat in the same online game and you can also see each other smoke beacon.)
I Got 40Mbit (3,6MB)download + 4Mbit (400Kb) Upload
I also have the downloadable content: Japanese Army. (lookslike this is the problem)