Does something like AssetBundles exist in UE4?

Hey,

I want to use UE4 instead of Unity3D. I wonder if something like AssetBundles in Unity3D also exist in UE4?

Description of AssetBundles:

“AssetBundles let you stream additional assets via the WWW class and instantiate them at runtime.”

now, you can use unreal engine 4 mobile patching,

It can update not only resources, but also blueprint code, amazing!