An adaptive call admission control scheme with load balancing for QoS enhancement in RoF based converged UMTS /

As universal mobile telecommunications system (UMTS) and wireless local area network (WLAN) have complementary characteristics, convergence of UMTS and WLAN offer seamless wireless access service to users. In a converged UMTS/WLAN enhancing quality of service (QoS) for different services require call admission control and load balancing. This paper analyses the performance of wideband power based (WPB) and throughput based (TB) call admission control schemes in UMTS/WLAN. Further an adaptive call admission control scheme with load balancing for enhancing QoS in hybrid coupled and radio over fiber (RoF) based UMTS/WLAN convergence network is analysed. Simulation results show that adaptive call admission control with load balancing improves QoS in RoF based UMTS/WLAN compared to hybrid coupled UMTS/WLAN convergence network. Keywords—Admission control, hybrid coupled, RoF, Converged UMTS WLAN, load balancing, QoS. Manuscript received August 30, 2011. R. Shankar is an Assistant Professor in the Department of ECE at Sri Manakula Vinayagar Engineering College, Pondicherry, India. (E-mail: [email protected]). P. Dananjayan is a Professor in Department of ECE, Pondicherry Engineering College, India. (E-mail: [email protected]).