  LTE is well on its way to becoming the primary cellular standard, due to its
performance and low cost. Over the next decade we will become dependent on LTE,
which is why we must ensure it is secure and available when we need it.
Unfortunately, like any wireless technology, disruption through radio jamming
is possible. This paper investigates the extent to which LTE is vulnerable to
intentional jamming, by analyzing the components of the LTE downlink and uplink
signals. The LTE physical layer consists of several physical channels and
signals, most of which are vital to the operation of the link. By taking into
account the density of these physical channels and signals with respect to the
entire frame, as well as the modulation and coding schemes involved, we come up
with a series of vulnerability metrics in the form of jammer to signal ratios.
The ``weakest links'' of the LTE signals are then identified, and used to
establish the overall vulnerability of LTE to hostile interference.
