BMC-SDN: Blockchain-Based Multicontroller Architecture for Secure Software-Defined Networks

Multicontroller software-defined networks have been widely adopted to enable management of large-scale networks. However, they are vulnerable to several attacks including false data injection, which creates topology inconsistency among controllers. To deal with this issue, we propose BMC-SDN, a security architecture that integrates blockchain and multicontroller SDN and divides the network into several domains. Each SDN domain is managed by one master controller that communicates through blockchain with the masters of the other domains. The master controller creates blocks of network flow updates, and its redundant controllers validate the new block based on a proposed reputation mechanism. The reputation mechanism rates the controllers, i.e., block creator and voters, after each voting operation using constant and combined adaptive fading reputation strategies. The evaluation results demonstrate a fast and optimal detection of fraudulent flow rule injection.

Study of Master Controller Structure for Multiple Air Compressor System

Compressed air is an important medium for energy transfer in industrial processes. It drives various actuators, which create a large force for significant movements and a high operation speed. Thereat, these mechanisms are quite small, and the design is simple and reliable. They are applicable in food and pharmaceutical technologies. Compressed air systems belong to the largest energy consumers at such enterprises. They consist of several compressors, and the drive of one of them is powered by a frequency converter in order to save electrical energy. This is called a multiple air compressor system, and its operation is controlled by a separate controller – master controller. The paper discusses the results of developing the master controller design and its operation algorithm. As an additional informative signal in the developed design of the master controller, air flow rate measurements are used; additionally, the speed of the air flow rate variation is analysed.

Asic Design and Verification of Amba Apb Protocol using Uvm

ASIC Implementation of AMBA APB convention with confirmation has been proposed right now. The structure presents Advanced Peripheral Bus Protocol (APB) in last part. To interface the peripherals, low data move capacity and low execution transport of APB is used. Henceforth, an altered ASIC plan with explicit less highlights, with better planning, low force necessity and less zone overhead, has been proposed. This plan is explicitly adept for advanced frameworks which have sequential transport interface necessity for on board correspondence. Additionally, the Firm IP centre of Master Controller has been intended for ASIC, which makes the structure exceptionally versatile on any ASIC chips or SOC plans. The whole custom ASIC execution of proposed configuration has been done in Synopsys Tool chain with 32nm standard cell library and this structure is verified utilizing Universal Verification Methodology (UVM).