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Title: Using WLAN/3G Dual-mode Terminals and an Algorithm to Enhance The Performance of Dual-mode Mobile Communication Service
Authors: Cheng, Ching-Wen; Chung, Chyan Goei
Keywords: heterogeneous networks
wireless LAN
vertical handoff
energy efficient
Issue Date: 11-11-2008
Abstract: 3G/WLAN dual-mode mobile communication service possesses global mobility and roaming with high transmission rate and low communication cost. However, it confronts the drawbacks of long callorigination delay, heavy vertical handoff (VHO) overhead, and unnecessary battery energy consumption. In this paper, we analyze the mobile and call patterns of users to identify the factors represented the condition of the visited communication environment. We also propose a simple mechanism for dual-mode mobile terminals to determine the network system to adopt to avoid the drawbacks. Our results show that the proposed mechanism can effectively alleviate call-origination delay and VHO overhead. Besides, the grade of service of WLANs in dual-mode environments is enhanced.
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