Towards Dependable wireless networks a QoS constraint resource management scheme in heterogeneous environment

End-to-end Quality of Service (QoS) provisioning in wireless heterogeneous networks require complex resource management and link utilization strategies. One important issue in QoS compliance relates to load-balanced resource management for increased survivability and availability of network services. In this paper, QoS provisioning issue has been addressed with the help of token bucket regulator (TBR) based cumulative link capacity estimation, using multiple radio access technologies. This estimation is used to achieve redundant paths to ingress router of a QoS provisioned subnet, which increases availability of network services. Traffic is routed through any one or combination of multiple available paths, enabling fast data forwarding. The fluctuations of link conditions in heterogeneous wireless networks are also absorbed in the token bucket regulator causing smooth traffic flow. Simulation results provide sufficient support in favor of proposed model for maximized call-admission, minimized call-block and improved resource management under high traffic load conditions.