![]() Enhanced ring architecture is a two level ring network connecting the local rings by a backbone ring. In this paper the shortcomings of conventional ring networks are discussed and how these shortcominings are solved by the enhanced ring architecture is explained. Timing and synchronization, control distribution, reliability and performance will be covered in subsequent issues of the journal. Configuration and topology and loop-capacity sharing are discussed. In Part 1, loop networks are introduced and individual loops described. It is shown that loops can have performance advantages over other configurations. In a section on performance different loops are compared with each other and with other topologies, particularly stars, random-access highways and polled highways. Topology (single and multiloops), multiplexing techniques, distribution of control, synchronization, reliability and performance are discussed. The significant features of loops are identified and discussed, with emphasis on communications aspects, rather than operating systems or software. ![]() Several demand-shared loops are surveyed and compared, and some nondemand-shared loops described. Loop networks for computer communications are of interest due to inherent advantages of performance, modularity, simplicity and cost. ![]()
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