  In this paper, we study relay networks with orthogonal components in presence
of noncausal channel state information (CSI) available at the source. We
propose an upper bound on the capacity of the discrete memoryless model (DM)for
the case in which just the source component intended for the destination is
encoded against the CSI known non-causally at the source. Also, we derive
capacity for two special classes of the Gaussian structure of the model. The
first class is the one for which we have obtained the upper bound and the
second class is the one in which all of the source components intended for the
relays and destination are encoded against the noncausal CSI, however, no
interference at the relays and destination exists in this case.
