An OFDMA based RF interconnect for massive multi-core processors
Eren Unlu, Mohamad Hamieh, Christophe Moy, Myriam Ariaudo, Yves Louët, Frédéric Drillet, Alexandre Brière, Lounis Zerioul, Julien Denoulet, Andréa Pinna, Bertrand Granado, François Pêcheux, Cédric Duperrier, Sébastien Quintanel, Olivier Romain, Emmanuelle Bourdel · 2014
A paradigm shift is apparent in Chip Multiprocessor (CMP) design, as the new performance bottleneck is becoming communication rather than computation. It is widely provisioned that number of cores on a single chip will reach thousands in a decade. Thus, new high rate interconnects such as optical or RF have been proposed by various researchers. However, these interconnect structures fail to provide essential requirements of heterogeneous on-chip traffic; bandwidth reconfigurability and broadcast support with a low complex design. In this paper we investigate the feasibility of a new Orthogonal Frequency Division Multiple Access (OFDMA) RF interconnect for the first time to the best of our knowledge. In addition we provide a novel dynamic bandwidth arbitration and modulation order selection policy, that is designed regarding the bimodal on-chip packets. The proposed approach decreases the average latency up to 3.5 times compared to conventional static approach.