| dc.description.abstract | The wireless network technology has significant progress in recent years. Users prefer to use any devices to access wireless networks anytime, anywhere, but a single radio access technology (RAT) cannot fulfill the users’ needs. In order to satisfy the users’ requirement, 3GPP and IEEE are currently developing wireless network standards related to the heterogeneous wireless network environment. Because the heterogeneous wireless network is more complex than a single wireless network, there are many challenges for the integration and management of radio resources.
This thesis address a novel mechanisms to solve problems in joint radio resource management (JRRM). The fuzzy logic based algorithm can make proper initial RAT selection, horizontal handoff, vertical handoff, admission control and load balance. By considering three kinds of traffic, voice, video and data respectively, the proposed algorithm can meet the demand for quality of service (QoS) in the heterogeneous wireless network that includes GERAN, HSPA and Mobile WiMAX RATs.
The proposed algorithm is divided into four parts: traffic classification, resource estimation for reservation, admission control and RAT selection. Due to the flexibility and simplification, the fuzzy logic control (FLC) is chosen to make effective utilization of resources. The multi-attribute decision making (MADM) based RAT selection also has better efficiency than that in traditional radio resources management (RRM) mechanisms. | en_US |