Load balancing and call admission control in UMTS-RNC, using fuzzy logic

This paper addresses load balancing and call admission control (CAC) in the radio network controller (RNC) of UMTS system. Load balancing is done on a multi-processor system and the goal is to have all processors evenly loaded. CAC is done to retain the committed quality of service of the already established calls. In order to achieve the above-mentioned, an eagerness parameter is defined and computed with a fuzzy inference mechanism, based on load measurement and load estimation for each CPU. Implementation and results are explained in the paper.