MINIMIZING JITTER AND PACKET LOSS PARAMETERS OF QoS IN WiLD NETWORKS USING DYNAMIC BANDWIDTH ALLOCATION

摘要

WILD (WIFI Long Distance) links are used to extend the internet connectivity to the remote areas and under-served regions by using few numbers of hops from the gateway node. Quality of Service (QoS) in a set of qualitative and quantitative traffic Individualities explain traffic flow Inside specific applications. Throughput, delay, Jitter, and packet loss are some of the generally considered QoS parameters. To mitigate the congestion problem In gateway based muitl hop, WI-FI based long distance networks are used, and to enhance the QoS guarantees In real time traffic, QoS-aware dynamic bandwidth allocation scheme has been employed. The existing work Involves the dynamic slot scheduling algorithm to distribute the TDM A slots among the necessary nodes. The distribution process is carried out in a hierarchical manner using parent-child relationship of tree topology. By using the dynamic benefit weighted scheduling, the performance of traffic over the network can be increased. This dynamic benefit weighted scheduling uses the Weighted Round Robin (WRR) or fair queuing policy for calculating the weights and allocates the bandwidth dynamically. The weight calculation depends on two factors: 1) previous weights assigned at time slot, 2) average increase in weights ever the traffic. Using such a dynamic bandwidth allocation scheme achieves reduction in packet loss, variation in delay (jitter), and increase In QoS.