DYNAMIC MANAGEMENT OF NON-ISOCHRONOUS MULTIPRIORITY TRAFFIC IN DQDB METROPOLITAN-AREA NETWORKS

Digital networks have to interconnect remote computers in order to mak e available a communication link between them, assuring high transmiss ion rates, effective error control systems and low blocking probabilit ies. In this paper, a dynamic management of DQDB Multiple Access Contr ol is proposed. It is based on the opportune activation of the Increas ing Counter Priority Controlled mechanism, driven by the traffic level s present at the user interfaces. The goal is to make the operation of the Metropolitan Area Networks clear and effective for multipriority interworking between remote computers. An analytical model, able to id entify the correct activation threshold, as a function of the intensit y and distribution of the load, is here reported and its results are c ompared with the outputs provided by a DQDB network simulator. The adv antages obtainable with the considered policy, in terms of transmissio n rate and access delay, are shown and discussed. (C) 1997 Elsevier Sc ience B.V.