The past few years have shown that the bulk of cellular data usage is coming not from outdoors, but indoors. This trend will continue with LTE, especially as the enterprise begins to look at the service as a parallel network to existing connectivity solutions.

LTE does, however, need help to penetrate indoors for the enterprise. To reach equivalent WLAN performance from indoor LTE, enterprises need to take one of two approaches (possibly subsidized by carriers looking to push LTE adoption):

- A femtocell or picocell array that would provide additional coverage indoors. While cost-effective, these technologies cannot provide a guaranteed SLA and don't offer consistent coverage throughout larger facilities.

IN DEPTH:

- A (DAS) provides more "blanket" coverage indoors but is not exactly inexpensive. This is changing, however, as more DAS providers examine new ways to leverage existing technologies to extend LTE coverage, which will drive down the cost.