Hi am zahra i would like to get details on matlab coding for Seamless handoff from WLAN to Cellular Network by AP’s Frequency Channel Support of wireless nodes ..My friend said matlab coding for vertical handoff decision making using genetic algorithm will be available here and now i am living at iran and i last studied in the univercity and now am doing my master degree thesis i need help on my matlab code
With the increasing demands for new data and real-time services, wireless networks should
support calls with different traffic characteristics and different Quality of Service (QoS)
guarantees. In addition, various wireless technologies and networks exist currently that can
satisfy different needs and requirements of mobile users. Since these different wireless
networks act as complementary to each other in terms of their capabilities and suitability for
different applications, integration of these networks will enable the mobile users to be
always connected to the best available access network depending on their requirements.
This integration of heterogeneous networks will, however, lead to heterogeneities in access
technologies and network protocols. To meet the requirements of mobile users under this
heterogeneous environment, a common infrastructure to interconnect multiple access
networks will be needed. Although IP has been recognized to be the de facto protocol for
next-generation integrated wireless, for inter-operation between different communication
protocols, an adaptive protocol stack is also required to be developed that will adapt itself to
the different characteristics and properties of the networks (Akyildiz et al., 2004a). Finally,
adaptive and intelligent terminal devices and smart base stations (BSs) with multiple air
interfaces will enable users to seamlessly switch between different access technologies.
For efficient delivery of services to the mobile users, the next-generation wireless networks
require new mechanisms of mobility management where the location of every user is
proactively determined before the service is delivered. Moreover, for designing an adaptive
communication protocol, various existing mobility management schemes are to be
seamlessly integrated. In this chapter, the design issues of a number of mobility
management schemes have been presented. Each of these schemes utilizes IP-based
technologies to enable efficient roaming in heterogeneous network (Chiussi et al., 2002).
Efficient handoff mechanisms are essential for ensuring seamless connectivity and
uninterrupted service delivery. A number of handoff schemes in a heterogeneous
networking environment are also presented in this chapter.
The chapter is organized as follows. Section 2 introduces the concept of mobility
management and its two important components- location management and handoff
management. Section 3 presents various network layer protocols for macro-mobility and
micro-mobility. Section 4 discusses various page link layer protocols for location management.