Abstract:
The projections of future Internet growth and the emergence of new applications as well as economic modelling of traffic behavior informed this research work which deals with design of a system using combination of existing models such as Admission Control, Scheduling and some aspects of Active Queue Management to achieve optimum network throughput and efficient allocation of bandwidth in a multi-class traffic environment.
The proposed scheme is router-centric. The interface being investigated is the router interface between two autonomous networks. The Internal Network is a domain network segmented into Virtual Local Area Network (VLAN) purposely for the ease of configuration of bandwidth allocations based on the policies defined by the administrator of a given domain. The edge router forms the interface between the internal network and the Internet and is the device responsible for the dynamic allocation of bandwidth based on the predefined configuration by the network administrator. The scheme uses four application metrics (bandwidth, delay, jitter, packet loss) attached to an application generated by a node. In the proposed scheme, if there is an admittance of a new node into the network, there shall be a provision of its inclusion in the network at the expense of agreeable degradation of service (i.e. all the other existing nodes the new node met agree to degradation of service) till a user-defined minimum threshold bandwidth below which no additional node can be tolerated in the network.
Network managers can use the mechanisms to implement their own policies for the allocation of network bandwidth. A policy enforcing fairness is explored experimentally. Projections are presented to show the feasibility of the method.
