Traffic Scheduling Algorithm for Wireless Networks Using QoS Provisioning Framework

摘要

In this paper,a new Quality of Service (QoS) provisioning scheme based on centralized scheduling is proposed for mesh mode operation. The scheme is developed from the QoS mechanism of Point to Multi-Point (PMP) mode specified in 802.16 standards. A scheduling algorithm with the concept of Urgency Index is proposed for efficient bandwidth resource usage. The proposed QoS framework is implemented into simulation model to assess the effectiveness. Simulation result shows excellent QoS performance. The delay and throughput statistics obtained through simulation shows the proposed scheduler is more responsive to traffic load changes and makes efficient use of bandwidth resources. The main contribution of this work is the QoS provisioning framework in mesh mode,which fully considers the network capacity in a mesh network scenario and employs the specially designed cross- service-class Urgency Index based scheduling algorithm.