If you've not heard of CTIA... Well, that's actually kind of understandable. While it does organize the US's largest mobile-dedicated trade show, CTIA has taken a back seat to shows like CES and MWC in the last couple of years. This is largely because CTIA focuses on the US market, and most hardware manufacturers prefer to have their latest wares unveiled on a slightly more international-friendly stage.
CTIA also typically runs two trade shows - one for consumers, and one for enterprises. I attended the latter back in October and it was pretty dead. Aside from spending some time with a couple of OEMs and carriers, the show was in a sort of sad state (as sad as anything in San Diego can be).