  HyperSurfaces are a merge of structurally reconfigurable metasurfaces whose
electromagnetic properties can be changed via a software interface, using an
embedded miniaturized network of controllers, thus enabling novel capabilities
in wireless communications. Resource constraints associated with the
development of a hardware testbed of this breakthrough technology necessitate
network controller architectures different from traditional regular
Network-on-Chip architectures. The Manhattan-like topology chosen to realize
the controller network in the testbed under development is irregular, with
restricted local path selection options, operating in an asynchronous fashion.
These characteristics render traditional fault-tolerant routing mechanisms
inadequate. In this paper, we present work in progress towards the development
of fault-tolerant routing mechanisms for the chosen architecture. We present
two XY-based approaches which have been developed aiming to offer reliable data
delivery in the presence of faults. The first approach aims to avoid loops
while the second one attempts to maximize the success delivery probabilities.
Their effectiveness is demonstrated via simulations conducted on a custom
developed simulator.
