On-line Bandwidth Control for Quality of Service Mapping in Telecommunication Networks

摘要

In telecommunication networks, a Quality of Service (QoS) mapping problem arises when different transport technologies (e.g., IP, ATM, MPLS, DVB) are employed to support the network services. The QoS mapping involves the change of encapsulation format, the need to aggregate traffic, as well as the channel degradation counteraction. In this work, a novel rate control mechanism is developed to face the mentioned problems. By exploiting Infinitesimal Perturbation Analysis to capture the network performance sensitivity, we obtain an adaptive control law, suited for on-line control on the basis of traffic samples acquired during the system evolution. Neither certainty equivalent assumptions are made on the stochastic environment, nor closed-form expressions of the chosen performance metric are required.