PDR: a new scheme of deadlock-free routing in mesh/torus interconnection networks

In this paper, a new scheme of deadlock-free routing in wormhole mesh/torus interconnection networks, path-division routing (PDR), is proposed. PDR is designed to provide high routing flexibility and diversity without adopting a deadlock-recovery scheme, thus its implementation is very simple because no deadlock detection mechanism is needed. Two design methods of PDR algorithms, namely the division method and the integration method, are also presented. An implementation example of PDR is also given, and from simulation results, its performance is shown to be satisfying when compared to several well-known routing algorithms adopting traditional deadlock avoidance or deadlock recovery scheme.