A cellular NoC architecture based on butterfly network coding (CBNoC)

The intra-chip communication latency and power consumption become the main bottleneck of the development of multi-core processors. Network-on-Chip (NoC) paradigm is proposed to meet these stringent requirements. Since the wireless network interconnection can achieve high speed data transmission with low power consumption, this paper proposes a cellular NoC architecture based on multiple butterfly network coding clusters with low latency. Data packets and control packets are transmitted on the wireless channel and the wired channel, separately. We also design a Z-X-Y path routing algorithm to achieve the shortest routing. Experiment results prove that, compared with Mesh, the proposed architecture can achieve at least 8% average latency reduction with slight resource increment.

I. Introduction

Throughout the decades, communication among multiple cores is a technical bottleneck in the development of multiprocessor on chip. In traditional bus architecture, it is difficult to meet the performance requirements of the system. So the network on chip (NoC) paradigm came into being [1]. In the past, most NoC paradigms adopt the form of wired connection [2]. However, according to the international semiconductor technology development roadmap (ITRS), it will be difficult to meet the performance requirements to improve the metal transmission line. In order to solve the problem, Chittamuru, Sai Vineel Reddy and Sudeep Pasricha proposed a photonic network using photonic communications [3]. M.-C.F. Chang et al. proposed the use of guided wave transmission for on-chip communication [4]. Dan Zhao and Yi Wang proposed UWB (ultra wideband) antennas for on-chip communication [5]. Among them, due to the characteristics of high data rate, low power consumption, wide spectrum of UWB, many researchers use UWB to realize wireless network on chip [6]–[8]. Deb S, et al proposed a small world (Small-World) network form. Nodes are divided into several subset. Data packets are transmitted over wired channels in subnets, and over wireless channels among subsets.