Now don't take this for granted, because I'm not "exactly" sure. But I think sweep picking is basically just struming different notes on each string, one string at a time. from the low "E" string to the high "E" string (maybe with a pattern), or vice versa.
Example:
----------11/12-------------
--------10-----10-----------
------9-----------9---------
----7---------------7-------
--9-------------------9-----
10---------------------10h11

But as I said before...I'm not exactly sure. Are there any other names for it you can think of besides "sweep picking"?
I may be able to help you a bit better if I knew exactly what it was. (Though sweep picking may be it's technical name, I probably know it as something else).

I hope this helps, & good luck.