  Interactions between solitons and the coherent oscillation structures
generated by localized disturbances via modulational instability are studied
within the framework of the focusing nonlinear Schrodinger equation. Two main
interaction regimes are identified based on the relative value of the velocity
of the incident soliton compared to the amplitude of the background: soliton
transmission and soliton trapping. Specifically, when the incident soliton
velocity exceeds a certain threshold, the soliton passes through the coherent
structure and emerges on the other side with its velocity unchanged.
Conversely, when the incident soliton velocity is below the threshold, once the
soliton enters the coherent structure, it remains confined there forever. It is
demonstrated that the soliton is not destroyed, but its velocity inside the
coherent structure is different from its initial one. Moreover, it is also
shown that, depending on the location of the discrete eigenvalue associated to
the soliton, these phenomena can also be accompanied by the generation of
additional, localized propagating waves in the coherent structure, akin to a
soliton-generated wake.
