Existing Admission Control Algorithms
In this section we highlight some admission control algorithms that are related to and have inspired our approach. The Simple Sum algorithm presented in [1] is a very simple algorithm that ensures that the admittance of a new flow does not exceed the link's bandwidth. The algorithm accepts a new flow if , where v is the sum of the already reserved rates, is the link bandwidth and is the rate of the flow . The Measured Sum is an alternative approach to the Simple Sum algorithm [1]. It uses measurements to estimate the load of existing traffic and performs the following check in order to make its decision , where is the measured load of existing traffic, is the maximum link bandwidth, and is the utilization target that defines a certain utilization of the network we want and is the rate requested by the flow . So this algorithm checks if the sum of the measured load of the existing traffic plus the rate of the new flow exceeds the target utilization of the link's bandwidth; if not, it admits the flow; otherwise, the new flow is rejected.