Comparative evaluation of band management systems considering multichannels in atm networks

Abstract

AbstractVarious communications services are provided over asynchronous transfer mode (ATM) networks, and traffic produced by these various services has various characteristics. Thus, in attempting to utilize circuits effectively by statistical multiplexing effects as in ATM networks, band management control reserving bands necessary to ensure communications quality in terms of cell loss probability, etc., is necessary when a call occurs. In addition, since communications quality required by various services differ, band management considering priority processing is effective. In addition, since a number of switching machines exist between transmission and reception nodes and a number of channels exist in links between each ATM switching machine, control to select one of these channels at the time of call setup is important. It is necessary even in this case to sufficiently consider traffic characteristics of calls for each service.In this paper, channel selection methods for such multichannel links are studied. For this purpose, the multiplicity of traffic establishable for a set of channels is obtained analytically following a step‐modeling technique and the efficiencies of various channel selection methods for a number of channels are studied. The characteristics and efficiency of each method are clarified by analyses and simulation using channel utilization rate and call loss rate as efficiency parameters for designing the efficiency of channel selection systems.