Net Utility-Based Network Selection Scheme in CDMA Cellular/WLAN Integrated Networks

To provide mobile users with seamless wireless access and guaranteed quality of service (QoS) anywhere and anytime, it is a trend to integrate CDMA cellular networks and wireless local area networks (WLANs) into heterogeneous networks in next generation all-IP wireless networks. Network selection and QoS support for different services are two of the major challenges in integrated CDMA cellular/WLAN networks. In this paper, a net utility-based network selection scheme was proposed, which takes into account the network resource, QoS requirements of applications, user mobility, and vertical handoff. The goal of the proposed scheme is to guide users to select the most suitable access network, where the users´ QoS requirements can be satisfied and the cost that user paid for is the lowest. Simulation results demonstrate the effectiveness of the proposed network selection scheme in integrated CDMA cellular/WLAN networks.