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In future wireless access networks, connectivity to wired infrastructure will be provided through multiple access points with possibly different capabilities and utilization. The demand for increased network performance requires the ability to predict the best overall performance of those access points and to switch access point when the performance changes. Then there is the demand for mobility between...
This paper describes a current mechanism for mobile IPv6 fast handover in the wireless LAN and examines its drawbacks, and suggests a new mechanism of predictive fast handover which provides a reduced latency for obtaining address configuration parameter from a router using of light-weight extended WLAN function when performing address configuration through access point. Analytic performance evaluation...
The wireless networking environment presents some interesting challenges to the study of broadcasting and multicasting problems, because networks have to be different as occasion demands. Therefore, several types of broadcasting or multicasting protocols have been studied. This paper addresses the problem of broadcasting (and multicasting) focusing on the two points of energy efficient networking...
The event-driven network simulation platforms, e.g. NS2 and GloMoSim, adopt some general wireless channel propagation models providing the pathloss of the channel as well as the SNR of each received packet to estimate the BER. However, these SNR-based general channel models give more accurate results for outdoor environments than indoor. On the other hand, the SIRCIM is a well-established channel...
Most existing wireless IDSs do not provide timely active responses to wireless intrusions as the execution of the responses is done manually by the administrator. Some wireless IDSs address this issue by providing automated responses. On one hand, they reduce the chances of successful wireless attacks by responding immediately to intrusions. On the other hand, they execute responses without considering...
Residual bit-errors in wireless environments are well known to cause difficulties for congestion controlled protocols like TCP. In this study we focus on a receiver-based loss differentiation approach to mitigating the problems, and more specifically on two different loss notification schemes. The fully receiver-based 3-dupack scheme uses additional dupacks to implicitly influence the retransmission...
To evaluate the application-level performance in wireless networks, we build a wireless performance simulator which include a application traffic characteristic, network architecture, network element details and protocol features. We also develop the simulation modelling methodology using Lindley’s recursion method to reduce the number of simulation events. Using the simulator, we assess the user-perceived...
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