I admit that it seems to be an abuse of the patent system in some regards.

But its not patent trolling. Qualcomm is making a real product and truly selling it. Anyone who wants that product is allowed to buy from Qualcomm or even license it for their own use.

A "Patent Troll" is someone who has no intention of even making the product, sitting on the patents suing everyone. Its far worse than what Qualcomm is doing here. In effect, a "Patent Troll" kills the technology. The company has no ability (or intention) to actually make the tech, yet still prevents everyone else from making the tech.