Performance Comparison of Simple Admission Control and Adaptive Admission Control in The Bandwidth Broker of a Differentiated Service Model

Writer/Researcher : Glenn, Veronica Windha M.

Area of Research : Telekomunikasi

Journal : Elektro

Volume : 3, No.2

Year : 2010

The existence of various applications in Internet requires a certain level of Quality of Service (QoS). This requirement stimulates the development of some architectures, such as; Differentiated Service (Diffserv). In the Diffserv domain, network load control is needed. One example of network load control is Bandwidth Broker (BB). BB in Diffserv domain is responsible for providing QoS. BB maintains resources in the network by controlling the network load using an admission control. Admission control is an algorithm to define whether a reserved bit rate request is accepted or not. Simulation has been built using Network Simulator-2 (NS-2) version 2.26 software. The simulation has been done for two algorithms: Simple Admission Control (SAC) and Adaptive Admission Control (AAC). Performance indicators used are acceptance rate, network utilization, and waiting time for a request until it is served. Results from the simulation show that acceptance rate for SAC is higher than AAC, waiting time for SAC is less than AAC, and network utilization for AAC is higher than SAC.

Keywords: Bandwidth Broker, Admission Control, Differentiated Service.