WIRELESS NETWORKS

Quality of Service in Wireless Networks

Table of Contents

Introduction1

Problem Statement1

Research Questions2

Aims and Objectives2

Approach and Methodology3

Literature Review3

Quality of Service in UMTS Wireless Network3

Integrated Service (IntServ)4

Differential Service (DiffServ)5

Quality of Service (QoS) Manager5

Quality of Service in B3G/4G Wireless Network6

Simulation Model Design7

Result Discussion8

Understanding, Conclusions and Future Work10

Future Work12

Quality of Service in Wireless Networks

Introduction

Day by day communication through technological means has become more popular over the past decade due to the numerous developments in the area of wireless technologies. During the past decades the evolution of these wireless technologies has enabled the development to better achieve users' satisfaction. New innovations in cellular networks are also emerging subject to the demand of users. At present, with increasing number of demand driven applications, different types of services are available to fulfill the expectation of users. Against this backdrop, efficient Quality of Service (QoS) method is required to sustain and improve the quality of the multifarious services aspiring to satisfy users' satisfaction (Wernik, 2002). This need is much more expedient in real-time application such as voice and video telephony, QoS has enormous importance in providing efficient services in order to fulfill the users' expectation.

Problem Statement

The necessity of QoS is one of the key issues in order to design and analyze the 3G/UMTS and B3G wireless networks. Due to the ubiquitous bandwidth limitations for real-time applications in 3G/UMTS wireless network such as voice and video telephony and with increasing number of application, service classification and efficient resource management are quite laborious tasks. For this reason the service quality degrades in 3G/UMTS wireless network. Proper resource and traffic management are important factors to handle different types of applications in the network to improve the service quality in video and voice transmission. In order to manage the resources and to handle the traffic properly in the network, QoS implementation is necessary to provide better service as well as to fulfill the users' expectations.

Research Questions

The primary approach in achieving the intended outcome for this research work depends on successfully answering the well formulated research questions below:

How the existing QoS parameters of the 3G/UMTS wireless networks can provide support for video and voice transmission?

How can the quality of video/voice transmission be improved on 3G wireless networks?

Is it needed to improve the existing QoS parameters for B3G/4G communication?

Aims and Objectives

The aim of this research work is to evaluate the existing QoS performance of video and voice conferencing in the 3G/UMTS wireless network based on some important performance metrics such as packet loss, delay, throughput and jitter. The procedure will be included

Simulation Model and graphs will depict the output of the performance metrics to realize and analyze the performance of the QoS 3G/UMTS wireless networks.

From the evaluation of our result and the analytical observation in 3G/UMTS wireless networks, we will recommend what should be added to improve the QoS in order to achieve reliable transmission and reception across the 3G wirless network.

Approach and Methodology

There are different types of network simulators in order to simulate the wireless networks such as OPNET Modeler, NS2 ...