Admission control for multi-services traffic in hierarchical MobileIPv6 networks using fuzzy inference system

Call Admission Control (CAC) plays a significant role in providing Quality of Service (QoS) in wireless broadband mobile networks. Although much research focuses on modified Mobile IP to get better efficient performance, there are few papers to discuss admission control when considering handover and mobility management. CAC should be introduced to Mobile IP-based network to guarantee the QoS for users. In this paper, we propose a CAC scheme which incorporates multiple traffic types and adjusts the admission threshold dynamically using fuzzy inference system (FIS) to achieve better usage of resources. According to the simulation results, it was evident that these CAC schemes can reduce the probability of the handoff dropping and the cell overload and limit the probability of the new call blocking. The method can provide QoS in Mobile IPv6 networks with few modifications on MAP functionality and slight change in binding update (BU) message formats.

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