  One of the main challenges towards the growing computation-intensive
applications with scalable bandwidth requirement is the deployment of a dense
number of on-chip cores within a chip package. To this end, this paper
investigates the Wireless Network- on-Chip (WiNoC), which is enabled by
graphene-based nanoantennas (GNAs) in Terahertz frequency band. We first
develop a channel model between the GNAs taking into account the practical
issues of the propagation medium, such as transmission frequency, operating
temperature, ambient pressure, and distance between the GNAs. In the Terahertz
band, not only dielectric propagation loss but also molecular absorption
attenuation (MAA) caused by various molecules and their isotopologues within
the chip package constitutes the signal transmission loss. We further propose
an optimal power allocation to achieve the channel capacity. The proposed
channel model shows that the MAA significantly degrades the performance at
certain frequency ranges compared to the conventional channel model, even when
the GNAs are very closely located. More specifically, at transmission frequency
of 1 THz, the channel capacity of the proposed model is shown to be much lower
than that of the conventional model over the whole range of temperature and
ambient pressure of up to 26.8% and 25%, respectively.

Distributed, Parallel, and Cluster Computing