Dynamic Buffer Management for Multimedia QoS in Beyond 3G Wireless Networks

Date

2009-11-19

Advisors

Journal Title

Journal ISSN

ISSN

1306-4428

DOI

Volume Title

Publisher

IAENG

Type

Article

Peer reviewed

Yes

Abstract

This paper investigates a dynamic buffer management scheme for QoS control of multimedia services in beyond 3G wireless systems. The scheme is studied in the context of the state-of-the-art 3.5G system i.e. the High Speed Downlink Packet Access (HSDPA) which enhances 3G UMTS to support high-speed packet switched services. Unlike earlier systems, UMTS-evolved systems from HSDPA and beyond incorporate mechanisms such as packet scheduling and HARQ in the base station necessitating data buffering at the air interface. This introduces a potential bottleneck to end-to-end communication. Hence, buffer management at the air interface is crucial for end-to-end QoS support of multimedia services with multiplexed parallel diverse flows such as video and data in the same end-user session. The dynamic buffer management scheme for HSDPA multimedia sessions with aggregated real-time and non real-time flows is investigated via extensive HSDPA simulations. The impact of the scheme on end-to-end traffic performance is evaluated with an example multimedia session comprising a real-time streaming flow concurrent with TCP-based non real-time flow. Results demonstrate that the scheme can guarantee the end-to-end QoS of the real-time streaming flow, whilst simultaneously protecting the non real-time flow from starvation resulting in improved end-to-end throughput performance.

Description

Keywords

HSDPA- High speed downlink packet access, Universal Mobile Telecommunication System - UMTS, QoS, buffer management, resource allocation, radio access networks, multimedia traffic, real-time streaming

Citation

Yerima, S. Y. and Al-Begain, K. (2009) Dynamic Buffer Management for Multimedia QoS in Beyond 3G Wireless Networks. International Journal of Computer Science, 36(4),

Rights

Research Institute

Cyber Technology Institute (CTI)