LTE Testing : Help! Help!

All developers and testers working on various LTE projects :-

How are you testing your devices?

Is there any tool available to test conformance of protocols?

How is LTE device tested for performance?

Any inhouse tools being built?

Any tools available for corporates to buy?

If you have any clue about what I am trying to say please feel free to write to me. Iam desperately looking for some ideas for testing LTE protocols (GTPv2) .

Mail: santoshdornal@gmail.com

Thanks

Santosh Kumar Dornal