  In next generation communications, slicing enables the selection and
allocation of network resources to suit the requirements of very different
vertical-driven use cases and applications. This work addresses fast real-time
resource slicing by proposing the novel concept of slicing at the physical
layer. To implement such a concept an orthonormal transform is devised that
splits the Orthogonal Frequency Division Multiplex (OFDM) symbol into slices
with ranked rate and latency. The advantage over any carrier or time
segmentation of the original frame is that the proposed technique does not
require channel information at transmission. Also, the frame overhead improves,
and the decoding time is kept simple.
