Impact of Traffic Matrix and Routing on the Performance of Network Admission Control Methods

In this paper we consider the performance of different network admission control (NAC) methods. In contrast to link admission control (LAC), they limit the traffic within a network by distributed protocols. We introduce four basic budget based NAC approaches such that most resource management schemes can be classified by them from a performance point of view. Since they have different complexity and efficiency, we compare their resource utilization in different networking scenarios. Our results show that the performance is rather independent of the traffic matrix for realistic scenarios while the routing protocol – singleor multi-path routing – has a significant impact on the resource efficiency of the IB/EB NAC, ILB NAC, and ILB/ELB NAC. Thus, our investigation helps to understand the performance implications of different resource allocation protocols and eases the design of efficient next generation QoS networks.