New Trends In Computer Networks
Spanning a wide spectrum of topics in computer networks, this book presents a selective collection of papers from the 20th International Symposium on Computer and Information Sciences, held in Istanbul, Turkey.
TABLE OF CONTENTS New Trends In Computer Networks
A Fuzzy-Based Vertical Handoff Scheme for Interworking between WLAN and GSM
FATMA TANSU, MUHAMMED SALAMAH
Computer Engineering Department, Eastern Mediterranean University, Magusa, T.R.N.C, Mersin 10, Turkey E-mail : fatma.tansu,muhammed.salamah@emu.edu.tr
The next generation wireless network environments are expected to support anywhere, anytime connectivity for high-performance applications like multimedia, full-motion video and high data rates with appropriate quality of service (QoS). To provide a solution to these demanding needs, service providers intend to combine different technologies in heterogeneous networks. In this study, we propose a fuzzy-based vertical handoff scheme for interworking between WLAN and GSM. We concentrated on crucial features like user preference, network conditions, speed, RSS and support of different service types. After extensive simulation, the results show that the proposed handoff scheme maintains a stable utilization against mobility under a specific load. Moreover, the proposed scheme provides good results for the call blocking and dropping probabilities, Grade of Service (GoS), and throughput.
1. Introduction
The next generation wireless network environments will support anywhere, anytime connectivity for high-performance applications like multimedia, full-motion video and high data rates with appropriate quality of service (QoS). At the turn of 21 st century, second and third generation (2G and 3G) cellular wireless networks were successfully employed by the wireless access providers. Today, wireless data services are becoming popular, but no one technology or service can provide ubiquitous coverage with all of the desired metrics like delay, latency and cost being satisfied. To provide a solution to these demanding needs, service providers intend to combine different technologies, such as Bluetooth, IEEE 802.11 WLAN, GPRS and...
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