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Chapter 12
DOI: 10.4018/978-1-5225-7570-2.ch012
ABSTRACT
The next generation of mobile wireless communications represents a heterogeneous environment which
integrates variety of network generation like third generation (3G), fourth generation (4G), and ffth
generation (5G). The major challenge in this heterogeneous environment is to decide which access point
to use when multiple networks are available. Process of roaming mobile user from one technology to
anther diferent is called vertical handover. In this chapter, the authors propose a new mechanism based
on graph theory and cost function in order to determine the best path for the end user in terms of qual-
ity of service (QoS) when the vertical handover process is needed. Then, they investigate the impact of
some existing weighting methods in order to determine the suitable method which can be coupled with
the cost function. The experiments evaluation by using Mininet emulator demonstrate that the proposed
approach can achieve a signifcant improvement concerning four QoS metrics: throughput, packet lost,
packet delay, and packer jitter for two services FTP and video streaming.
An Improved Modeling for
Network Selection Based
on Graph Theory and Cost
Function in Heterogeneous
Wireless Systems
Mohamed Lahby
University Hassan II of Casabalanca, Morocco
Ayoub Essouiri
University Hassan II of Casabalanca, Morocco
Abderrahim Sekkaki
University Hassan II of Casabalanca, Morocco