Fast growth, tiny fruits? (Porcelain Berry)

I planted this grape vine 4 year ago.  About a year later my dog chewed through the main stem.  The vine then grew very vigorously, without producing bunches of grapes.  Instead I get these tiny berry like fruits - see photo.  Any suggestions as to how to improve this situation gratefully received.

Where did you get the plant from? Your pic looks (to my untrained eye) more like the images I've seen of Parthenocissus berries, rather than a grape proper... Look at Parthenocissus tricuspidata, for instance. Just a thought, I might be completely wrong.

Thanks for your suggestion that it is not a grape vine.  It was sold to me as Coignetiae - Giant Crimson Glory Vine.

However, following up on your suggestion I think I have found its true identity:

Porcelain Berry (Ampelopsis brevipedunculata)

https://florapittsburghensis.wordpress.com/2013/10/23/porcelain-berry-ampelopsis-brevipedunculata/

Unfortunately, I don't believe the species is edible. At least raw.

Good news is that you found out and can now get a 'real' grape!

Yep, that looks like it. Plants for a Future claims the fruit is edible, but not very palatable. A bit of a shame, that, but well done on the ID:ing!

These pop up around the place and many years ago I tried one. Won't make that mistake again. Birds seem to love them, which is why I have to pull them out of trees from time to time.