Table of Contents
ISRN Communications and Networking
Volume 2011 (2011), Article ID 672195, 9 pages
http://dx.doi.org/10.5402/2011/672195
Research Article

Maximizing Downlink Bandwidth Allocation Method Based on SVC in Mobile WiMAX Networks for Generic Broadband Services

1Department of Computer Science and Engineering, Yuan Ze University, Chung Li, 32003, Taiwan
2Department of Computer and Communication Engineering, Ming Chuan University, TaoYuan 33348, Taiwan
3Department of Information Management, Kang-Ning Junior College of Medical Care and Management, Taipei 114, Taiwan

Received 31 August 2010; Accepted 4 October 2010

Academic Editors: G. Kim and Y.-J. Suh

Copyright © 2011 I-S. Hwang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper proposes an adaptive downlink bandwidth allocation method (DBAM) for six traffic types—UGS, RT-VR, ERT-VR, NRT-VR, BE, and multicast—to maximize the throughput of broadband WiMAX networks for generic broadband services. Based on traffic throughput and the amount of traffic in different scalable video coding (SVC) layers, two adaptive resource adjustment schemes with SVC technology in the DBAM are proposed and compared. Moreover, a hierarchical priority queuing for different traffic profiles with weighted round robin (HPWRR) scheduling algorithm is proposed to achieve higher resource utilization and to meet the required quality of service (QoS) for each traffic type. Simulation results show that the proposed DBAM with HPWRR can achieve efficient throughput and bandwidth utilization and improve the delay time for RT-VR and multicast traffic.