access icon free Wireless network access selection scheme for heterogeneous multimedia traffic

Global connectivity, at anyplace and anytime, to provide high-speed, high-quality and reliable communication channels, is now becoming a reality. The credit mainly goes to the recent technological advances in wireless communications, which consist of a wide range of technologies and applications to fulfil the particular needs of end-users in different deployment scenarios (Bluetooth, Wi-Fi, WiMAX and third generation/fourth generation cellular systems). In such a heterogeneous wireless environment, one of the key ingredients to provide efficient ubiquitous computing is the design of intelligent handoff algorithms, which select the optimal target network. This study presents a novel approach for the design and implementation of a multi-criteria vertical handoff decision algorithm for heterogeneous wireless networks to achieve seamless mobility while maximising end-users’ satisfaction. Two important modules are designed; the first module estimates the necessity of handoffs and the second module selects the best network as the target of handoff. Several parallel fuzzy logic controllers with reduced rule sets are used, in combination with a fuzzy ranking algorithm, to implement these modules. Simulation results are provided and compared with a benchmark for different evaluation metrics.

Inspec keywords: telecommunication control; fuzzy logic; mobility management (mobile radio); telecommunication traffic; fuzzy control; radio networks; multimedia communication

Other keywords: third generation cellular system; parallel fuzzy logic controller; fuzzy ranking algorithm; heterogeneous wireless environment; ubiquitous computing; global connectivity; communication channel; heterogeneous multimedia traffic; multicriteria vertical handoff decision algorithm; evaluation metrics; seamless mobility; Wi-Fi; Bluetooth; reduced rule set; wireless communication; intelligent handoff algorithm; fourth generation cellular system; heterogeneous wireless network; WiMAX; wireless network access selection scheme

Subjects: Multimedia; Mobile radio systems; Network management; Multimedia communications; Control applications in radio and radar; Fuzzy control

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