An adaptive policy-based vertical handoff algorithm for heterogeneous wireless networks

The next generation of wireless networks is envisioned as convergence of heterogeneous radio access networks. Since technologies are becoming more collaborative, a possible integration between IEEE 802.16 based network and previous generation of telecommunication systems (2G, ..., 3G) must be considered. A novel quality function based vertical handoff (VHO) algorithm, based on proposed velocity and average receive power estimation algorithms is discussed in this paper. The short-time Fourier analysis of received signal strength (RSS) is employed to obtain mobile speed and average received power estimates. Performance of quality function based VHO algorithm is evaluated by means of measure of quality of service (QoS). Simulation results show that proposed quality function, brings significant gains in QoS and more efficient use of resources can be achieved.

Understanding the policy implications of ICT for development

Information and communication technologies are thought by some to offer a new solution to world poverty.
It is argued that information and communication technologies (ICT) allow poor countries to ‘leap-frog’
traditional stages of development and become immediately engaged with the ‘new economy’. Such an
optimistic view requires appropriate government policies to facilitate this shift. Interventions required
would include improving access levels and quality of telecommunication and electricity infrastructure,
improved quality of education and numbers of those accessing education, and providing both direct
and indirect support to encourage local firms to become engaged with the global economy. Ironically,
these policies are consistent with current orthodox development policies currently pursued within the
‘traditional’ economy. This chapter therefore considers what exactly is new about ICT in terms of its
potential impact on the poor.