A hierarchical architecture based on traveling salesman problem for hybrid wireless network-on-chip

The increased latency and power consumption are the major challenges of traditional wired Network-on-Chip (NoC). The Wireless NoC (WNoC) architecture is regarded as a novel approach to solve NoC problems. In this paper, hybrid hierarchical structures are studied. The considered topologies for the first level of the hierarchy include: Chordal Ring of degree 3 (CR) and Ring-Connected Cycles (RCC). On the second level of the hierarchy, inspired by the Traveling Salesman Problem (TSP), a new method is proposed to form the topology. Considering the NP-Hard nature of the problem, the hybrid PS-ACO algorithm is used to obtain the desired tour. In this paper, the uniform random traffic is used as the synthetic traffic pattern and the 3-tuple traffic is used as a real application traffic pattern. The simulation results show that the proposed structure has fewer wired links and considerably increased efficiency compared with a wired mesh topology in NoC.