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Conference Paper
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Extensive studies have been carried out for reducing the handover time of wireless network at medium access layer (MAC). However, none of them depicts the impact of reduced handover time on the overall performance of wireless networks. This paper presents the methodology that can be used to effectively reduce the handover time. Our proposed model i...

Citations

... In order to collect the information, two methods of scanning are commonly available in the literature: active scanning and passive scanning [42]. Active scanning refers to keeping on all the interfaces continuously active while passive scanning refers to the periodic activation of the interfaces for verifying the availability of new networks. ...
Article
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Advances in technology have enabled a proliferation of mobile devices and a broad spectrum of novel and outbreaking solutions for new applications and services. The increasing demand for all time and everywhere services requires the network operators to integrate different kinds of wireless and cellular networks. To enable this integration, it is important that users can roam freely across networks. As different technologies are involved in the current infrastructure, the problem of vertical handover needs to be addressed. To cope with the problem of seamless connectivity, several solutions have been presented. But most of them either lack intelligence or are not adaptable for reducing the packet loss and delay involved in the handover procedure. An intelligent technique is needed in order to perform the service continuity in the heterogeneous environment. This paper presents a cooperative agent based approach for the vertical handover using a knowledge plane. We propose to introduce the agents in the mobile nodes and access points to collect the necessary information from the environment. Based on this information, agents take a handover decision. A selection function is also introduced in this work which helps in choosing a best network from the available ones for handover. Finally, the proposed approach is validated with the help of simulations.
Article
In this paper, we propose a new mechanism, called the Spiderman Handover, for enabling Wi-Fi technology to support high speed mobility. It introduces two new 802.11 operational modes: the Spiderman mode and the Wireless Switch Access Point mode. We describe its operation, highlighting the Spiderman Handover and the Gratuitous ARP Loop routing update procedure as key elements for providing seamless horizontal handover for high-speed vehicles such as trains. We discuss and evaluate its operation theoretically and by means of simulation, concluding that the proposed mechanism is able to provide track-side connectivity with virtually no packet loss while keeping the observed latency invariant to the handover frequency.
Conference Paper
One of the vision of next generation networks is an all-IP network supporting heterogeneous access technologies for the purpose of providing the mobile user with roaming capability across different networks. To enable this type of mobility known as vertical handover (VHO), an intelligent technique is needed in order to perform the service continuity. This paper presents a multi-agent based approach for the VHO. We propose to introduce the agents in the mobile nodes (MNs) and Access Points (APs) to collect the necessary information from the environment. Based on this information, agents will anticipate the handover in order to reduce the handover latency. We have defined three behaviors (Network Monitoring, Decision, and Network Selection) for the agents that will assist us in anticipating the handover.