ICALB: an integrated congestion avoidance and load balancing algorithm for distributed intelligent networks. Part Ⅰ: description of ICALB

摘要

The Intelligent Network (IN) technology has emerged with an aim to enhance the telecommunication network capabilities in terms of complex service provision. Due to the dramatic increase in service demand, the main concern in an IN system has become its scalability as well as the way intelligence is allocated to service calls. This is also the case in more advanced IN architectures like the Distributed IN which exploits new software technologies such as the Common Object Request Broker Architecture and the mobile agents. The Integrated Congestion Avoidance And Load Balancing (ICALB) algorithm proposed in this paper aims in fulfilling a number of objectives like congestion avoidance, protection of services already in progress, and fairness among different service's demands. Unlike existing algorithms like Call Gapping, ICALB adopts dynamic techniques for controlling traffic load, pedantically addresses the issue of fairness by fairly serving switches and applying priorities among services, and balances excessive traffic load among the available servers of a distributed system. These additional features broaden the scope of applicability of the ICALB to other service architectures like VoIP-based systems. SIP application servers and Gatekeepers in H.323-based architectures are such examples.