  We discuss results of magnetohydrodynamical model simulations of plasma
dynamics in the proximity of the heliopause (HP). The model is shown to fit
details of the magnetic field variations observed by Voyager 1 spacecraft
during the transition from the heliosphere to the local interstellar medium
(LISM). We propose an interpretation of magnetic field structures observed by
Voyager 1 in terms of fine-scale physical processes. Our simulations reveal an
effective transport mechanism of relatively dense LISM plasma across the
reconnecting HP into the heliosphere. The mechanism is associated with
annihilation of magnetic sectors in the heliospheric plasma near the HP.
