A Novel Wireless Network-on-Chip Architecture for Multicore Systems

Abstract

Using Wireless Network-on-Chip (WiNOC) for designing the multicore System-on-Chips can significantly decrease the latency and power dissipation of the network. This improvement is achieved by replacing the multi-hop paths between far apart cores with a wireless single-hop link. Due to space, power and cost limitations, it is crucial to determine both the optimum number of equipped wireless hubs and their proper positions. In this paper, we propose a novel approach to obtain the optimum configuration of a WiNOC by leveraging the Simulating Annealing algorithm. Simultaneous multiple communications in such a network can be achieved by using multiple access techniques such as Orthogonal Frequency Division Multiple Access (OFDMA) to create dedicated channels between a source and destination pair. This technique is more bandwidth efficient compared to previously used FDMA. Also, it can distribute the available bandwidth between wireless nodes according to the traffic demands. So, we introduce an adequate channel reallocation algorithm regards to the broadcasting nature of the OFDMA scheme. The introduced architecture shows better performance in comparison with the conventional WiNOCs. This improvement is especially observed for latency characteristics where an improvement of about 15 is obtained.