Abstract
The Next Generation Wireless Networks (NGWN) should be compatible with other communication technologies to offer the best connectivity to the mobile terminal which can access any IP based servi ces at any time from any network without the knowledge of its user. It requires an intelligent vertical hando ver decision making algorithm to migrate between technologies that enable seamless mobility, always best connection and minimal terminal power consumption. Currently existing decision engines are simple, proprietary and its handover is only based on the r eceived signal strength which has been proven unintelligent. The proposed decision algorithm gain s intelligence by combining fuzzy logic system to handle imprecise data, multiple attribute decision making to handle multiple attributes for decision m aking and context aware strategies to reduce unnecessary handover. The proposed intelligent decision algorit hm detects new network which offers best connectivity than current network and does authentication and mobile IP registration before making the handover; thereby reducing the packet loss to ensure high qua lity of service. This algorithm is capable of forwarding data packets to appropriate attachment point to maximize battery lifetime and also to maintain load balancing. The performance analysis shows that the proposed algorithm efficiently uses the network res ources by switching between 3G and Wi-Fi under the different RF environmental conditions to offer best connectivity with minimal service cost to the user s. It is observed that average handover delay for the experi ment is 30-40ms and the integration of cellular net work with WLAN using the proposed intelligent decision algorithm reduces the call dropping rate (<0.006) an d call blocking probability (<0.00607) as well as unn ecessary handover in heterogeneous networks.
Highlights
It is observed that average handover delay for the experiment is 30-40ms and the integration of cellular network with WLAN using the proposed intelligent decision algorithm reduces the call dropping rate (
Maaloul et al (2013) and Johnson et al (2013) have presented a novel context aware vertical handover algorithm based on multiple attribute decision making and the results have shown that algorithm avoids unnecessary triggered handover
The proposed approach in vertical handover decision algorithm using fuzzy logic-multiple attributes with context aware strategy enables mobile terminal to make proactive decision based on user preferences and Quality of Service (QoS) parameters
Summary
Qualcomm (2011) has stated that network operators are attempting to address this problem by provides high data rate compare to cellular networks This feature of Wi-Fi allows integration of Wi-Fi with UMTS network for seamless Wi-Fi offloading. This will reduce the number of active users on the cellular network upgrading their wireless WANs and deploying femtocells These upgrades increase the cost of deployment on network operator and decrease the in busy hours and gives better user experience with excellent Quality of Service (QoS). The development of IP based applications and mobile terminal with multiple network interfaces enables the mobile terminal to access the service from any network, at any time These problems can be addressed by integrating all available high data rate wireless access networks
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