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The move towards an increasingly heterogeneous infrastructure has been one of the directions followed by most mobile operators in recent years. Here, one of the problems still waiting for a solution is how to enable multi-mode mobile terminals to freely roam between the different wireless systems used by the network operator for providing access to its users. The IEEE 802.21 is just one of the standardization...
Recently, network selection for heterogeneous wireless networks has been widely studied by categorizing and employing various factors to decide the best network. Mobility-related factors can be used to represent mobility features of mobile terminals (MTs) and mobility support capabilities of wireless networks, but they are complicated in usage and are not well used in related works. In this paper,...
Handover between different wireless mobile networks is a key constraint for achieving subscribers satisfaction and enhancing the overall performance. More precisely, mobile subscribers wish to enjoy ubiquitous service availability while being sure of keeping the required security level and a comparable performance level when changing the aceess network. In this paper, we address this issue by proposing...
The future B3G or 4G mobile networks will consist of heterogeneous networks, including GSM, UMTS, and WiMAX. In order to realize a seamless vertical handover (inter-RAT handover), a variety of interworking architectures and inter-RAT handover mobility managements have been proposed. In this paper we consider the tight coupling architecture to achieve the interconnection between UMTS and WiMAX systems...
Nowadays wireless packet data services are provided over wireless MAN (WMAN) with high data rate while 3G cellular networks provide wide-area coverage with low data rate. The interworking of mobile WiMAX and 3G networks is indispensably required to serve users who need both high-speed wireless access as well as wide-area connectivity. In this paper, we propose a cross-layer optimization of vertical...
Constant development of wireless and mobile networks and their capabilities enlarges the plethora of possible user services. It opens potentials for the operators to increase their service portfolio and for the users to experience context-rich and personalized services. In this manner, the interoperability between different wireless networks and the enabling of seamless vertical handovers (VHOs) become...
The vision of next generation networks is an all-IP network supporting heterogeneous access technologies such as WLAN, UMTS and WiMax for the purpose of providing the mobile user with roaming capability across different networks. To enable this type of mobility known as vertical handover (HO), a special mobility management is proposed in order for the handover to be performed with service continuity...
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