If it's anything like the way Samsing licensed 3G IP to Qualcomm, then Samsung may attempt to argue that it licensed the LTE IP to Qualcomm, but that the license was terminated for any chips that were sold to Apple. The problem is that this violates the very principle of FRAND licensing, and is essentially anticompetitive.
If Samsung licensed to Qualcomm the same way that Motorola did, they included a defensive covenant that allowed them to sue any company that tried to sue them. It also might include the option to directly license to any company instead of allowing Qualcomm to act as intermediary.
AFAIK, the legality of those types of actions in the Motorola case (U.S. District Court #12-cv-355 filed back in Feb 2012) haven't been decided yet.
If Samsung isn't careful, it will be lucky to have any of its IP incorporated in future communication standards, because it is fighting against the very principles of common standards.
The major companies who actually did the LTE R&D, as Samsung did, would probably be more prone to be protective of Samsung than of Apple, who wants lower rates without cross-licensing.
It's definitely time for patent reform. For starters, standardizing licensing fees for IP that is considered part of a standard.
Excellent idea, but the major companies tend to privately resist such things.
They have absolutely zero reason to want to change the way it's been done for decades: start at a high rate, and negotiate downward if the licensee agrees to cross-licensing. This allows everyone to compete on price and included features, instead of much on exclusive features. It's smart self-protection.
In the early days of GSM, for example, when Motorola had over 50% of the patents, they were famous for having only two license options: 1) license included if you bought the carrier equipment and/or phone chips from them, or 2) free if you cross-licensed everything with them. There was no cash option.
ETSI's IP policy itself has very few teeth in it, mostly concerned with companies hiding IP. Otherwise, FRAND rates and contract requirements are up to each patent holder.