Threshold-based routing algorithm for RF-NoC OFDMA architecture

Habiba Lahdhiri 1 Jordane Lorandel 1 Emmanuelle Bourdel 1
1 ASTRE [Cergy-Pontoise]
ETIS - UMR 8051 - Equipes Traitement de l'Information et Systèmes
Abstract : Network-on-chip (NoC) is currently the chosen paradigm for interconnection in multicore architectures. On the other hand, the development of these architectures with thousands of cores leads to several issues regarding latency and power consumption, especially with conventional wired interconnects. Moreover, they do not support specific features like broadcast and multicast. Radio-Frequency NoC based on OFDMA seems an appropriate solution to overcome such issues, providing low latency for long communications and a significant communication bandwidth with a high spectral efficiency. It also permits a dynamic allocation of the available bandwidth among the different elements of the NoC, according to the communication needs. The routing algorithm has a significant impact on the overall performance of a RF-NoC, by diffusing the traffic in a suitable way between the wired and the wireless paths in order to improve the throughput and reduce the latency. In this paper, a threshold-based routing algorithm is proposed and evaluated for a 32×32 RF-NoC OFDMA architecture with 32 concurrent wireless channels. We demonstrate the importance to finely tune the threshold parameter to achieve a certain level of performance. Simulation results show a significant improvement in terms of latency and throughput.
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Habiba Lahdhiri, Jordane Lorandel, Emmanuelle Bourdel. Threshold-based routing algorithm for RF-NoC OFDMA architecture. ReCoSoC 2019, Jul 2019, York, United Kingdom. ⟨hal-02433969⟩

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