Design and analysis of fault-tolerant multibus interconnection networks

AbstractIn this paper a new class of fault-tolerant multibus interconnection networks is presented and analyzed. Efficiency and fault tolerance have been the driving forces in the design of these structures. The most common types of faults have been explicitly considered and in particular the jabbering problem has been adequately resolved. The analysis covers the evaluation of capacity, throughput and average delay and it includes faults of one or more channels. The system is shown to be very efficient and to be able to adequately support channel and station faults

The TurboLAN project. Phase 1: Protocol choices for high speed local area networks. Phase 2: TurboLAN Intelligent Network Adapter Card, (TINAC) architecture

The hardware and the software architecture of the TurboLAN Intelligent Network Adapter Card (TINAC) are described. A high level as well as detailed treatment of the workings of various components of the TINAC are presented. The TINAC is divided into the following four major functional units: (1) the network access unit (NAU); (2) the buffer management unit; (3) the host interface unit; and (4) the node processor unit

A study of topologies and protocols for fiber optic local area network

The emergence of new applications requiring high data traffic necessitates the development of high speed local area networks. Optical fiber is selected as the transmission medium due to its inherent advantages over other possible media and the dual optical bus architecture is shown to be the most suitable topology. Asynchronous access protocols, including token, random, hybrid random/token, and virtual token schemes, are developed and analyzed. Exact expressions for insertion delay and utilization at light and heavy load are derived, and intermediate load behavior is investigated by simulation. A new tokenless adaptive scheme whose control depends only on the detection of activity on the channel is shown to outperform round-robin schemes under uneven loads and multipacket traffic and to perform optimally at light load. An approximate solution to the queueing delay for an oscillating polling scheme under chaining is obtained and results are compared with simulation. Solutions to the problem of building systems with a large number of stations are presented, including maximization of the number of optical couplers, and the use of passive star/bus topologies, bridges and gateways

Blockchain and the Law

This book analyses the new blockchain and Distributed Ledger Technology (DLT) in term of its impact on law, contracts and the digital economy. It discusses global legislation in the blockchain and its implications. The analysis of contracts includes the Bitcoin system and the Bitcoin Blockchain. The book is written in an international and European perspective. It is characterised by a practical approach and addressed to lawyers who want to deepen their knowledge about legal aspects of new technologies such as the blockchain and other modern IT tools, but also to entrepreneurs, IT specialists, developers and IT managers in the implementation of DLT and block technologies