MicroLET: A New SDNoC-Based Communication Protocol for ChipLET-Based Systems

Abstract

Currently the industry moves to smaller process nodes even if the cost for yielding large dies continues to increase, moving to the 5nm and even 3nm nodes. Hence a chipletbased design has been initiated and quickly gain attention from industry, academia and government agencies. This cutting edge approach became advantageous to break down a large die into smaller chiplets in order to improve yield and binning. In order to exploit this new approach the interconnect fabric connecting the nodes of the entire system should be of high importance to enable the properly distribution of the data. Each individual chiplet may contain its own local Network on Chip (NoC), which operates for intra-chiplet traffic. However the communication over chipletbased systems is complicated enough, due to various routing algorithms and NoC topologies and an alternative solution is needed. In this paper we introduce an SDNoC(Software Define Network on Chip)-based communication protocol for chipletbased systems, called MicroLET, which consists of a flexible and modular SDNoC architecture and 3 main phases: Handshake, Network Monitoring, Routing. An implementation of the SDNoC architecture and an evaluation of the proposed routing algorithm compared to the XY and the Odd-Even algorithms within different traffic scenarios is presented. Through the evaluation of the MicroLET protocol, it is proven that it could be a good candidate for the future chiplet-based systems.

A novel Network-on-Chip security algorithm for tolerating Byzantine faults

“…Byzantine faults may appear independently in different NoC architectures. In this paper however, we target a NoC alternative called, SDNoC [17,7,18]. The SDNoC concept is derived from Software Defined Network (SDN) technology and targets as a main goal the minimization of router's complexity.…”

“…According to the researchers [17,18], SDNoC could be a potential solution for SoCs due to its advantages: 1) reduction of hardware complexity, 2) high re-usability, and 3) flexible management of communication policies. Fig.…”

“…The source router will contact the controller, to request a route. Afterwards the controller, with the help of a routing algorithm described on [17], will find a route and it will check all the routers along the route for faulty behavior, after which it will inform the source router for the next hop of the packet. Finally, Fig.…”

Towards NoC Protection of HT-Greyhole Attack

“…The launching part can individually be performed on different NoC architectures. However, for our defense and detection approach we target a NoC alternative, called SDNoC [12,13,14]. The SDNoC concept is inspired by the well known Software Defined Networking (SDN) technology [15].…”

“…The main idea of SDNoC is to minimize router complexity by exporting the routing logic to a centralized controller which has a general view of the network and can take routing decisions efficiently. According to the authors of [12,14], SDNoC could possibly be adaptable for SoCs thanks to its advantages: 1) it reduces the hardware complexity, 2) it has high re-usability and 3) it has flexible management of communication policies. However, there are also some challenges that should be taken into account, in particular the high overhead for path selection in software against hardware based approaches and the centralized controller can be a single point of failure.…”