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

I‐Shyan Hwang ,Ruey-Rong Su,Bor‐Jiunn Hwang

doi:10.5402/2011/672195

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.

Highlights

Existing wireless technologies are struggling to satisfy the enormous growth in demand for broadband wireless access (BWA), anytime and anywhere
Mobile worldwide interoperability for microwave access (WiMAX) systems, which is defined by the IEEE 802.16e standard [1] and called a broadband wireless metropolitan area network (WMAN), is an emerging technology
This paper proposes a novel adaptive downlink bandwidth allocation method (DBAM) with a hierarchical priority queuing with weighted round robin (HPWRR) scheduling algorithm for six different traffic profiles

Summary

Introduction

Existing wireless technologies are struggling to satisfy the enormous growth in demand for broadband wireless access (BWA), anytime and anywhere. In [7], to maximize total utility, the paper proposed a utility-based resource allocation scheme for layer-encoded IPTV multicast streaming service over WiMAX networks, which adjusts the number of received. In [12], the authors analyze the performance of a hierarchical video ondemand (VoD) system using layered videos in a broadcast environment, which stores popular videos in the proxy server, and broadcasts some of the video layers to the customers to minimize the blocking probability of the system Both adaptive modulation coding (AMC) and SVC are employed to enhance the perceived video quality, and the intermediate control server (ICS) deals with the signals between the multimedia server and the BS to maximize the resource utilization [13].

System Architecture and the Proposed Method

Simulation Model and Performance Evaluation

Findings

Conclusion