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Proceedings of the Fourth IASTED International Multi-Conference on Wireless and Optical Communications

作者： Chetan Kumar, S. Venkataram, P. Sircar, Ranapratap Protocol Eng. and Technology Unit E.C.E Department Indian Institute of Science Bangalore India Wipro Technologies Bangalore India

ISBN: (纸本)088986411X

With increasing demand for multimedia services over the packet data network infrastructure, WLAN networks are being considered as a good alternative to its wired counterparts due to the usual wireless advantage. However the MAC protocol defined by IEEE (based on Distributed Coordinated Function) does not provide QoS guarantee to run streaming media applications. In this paper we describe a scheme to support band-width guarantee in a multiuser environment with modification to PCF. We have tested the designed method by simulating various multimedia applications using ns-2 simulator. The simulation results show, with the proposed modification we can allocate the guaranteed bandwidth to multiple users and also ensure that optimal utilization of channel in spite of wireless problem.

关键词： Local area networks

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Reliable multicast routing in mobile networks: A neural-network approach

Reliable multicast routing in mobile networks: A neural-netw...

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作者： Vijay Kumar, B.P. Venkataram, P. Protocol Eng. and Technology Unit Elec. Commun. Engineering Department Indian Institute of Science Bangalore 560 012 India

The proposed multicast routing algorithm for future high speed mobile networks is discussed. The algorithm will be used for constructing a reliable multicast tree that connects the participants of a multicast group. A Kohonens self-organizing map will be used for clustering while multicast trees will be constructed using Hopfield neural networks. The testing of the algorithm for mobility of the participating mobile hosts is also discussed.

关键词： Telecommunication networks

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A Neural Network-Based Connectivity Management for Mobile Computing Environment

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International Journal of Wireless Information Networks 2003年第2期10卷 63-71页

作者： Vijay Kumar, B.P. Venkataram, P. Protocol Eng. and Technology Unit Elec. Commun. Engineering Department Indian Institute of Science Bangalore 560 012 India Dept. of Elec. Commun. Engineering Indian Institute of Science Bangalore India

The mobile computing environment experiences wireless problems and suffers from limited bandwidth, which leads to frequent disconnections. This has posed a challeng. in maintaining user-to-user connectivity in the mobile computing environment. In this paper, we propose a neural network (NN) based connectivity management for mobile computing environment to maintain the mobile user-to-user connectivity throughout the transaction. Here the Connectivity management maintains the status information of mobile hosts at the base station to handle frequent disconnection of mobile hosts (MHs), which occur because of hand-offs and interruptions. The disconnection of an MH because of wireless problems is called interruption, and the disconnection due to MH crossing the cell boundary is called hand-off. The neural networks are trained with respect to the status information to provide an intelligent decision for the connectivity management The simulation results demonstrate that the proposed technique performs well in terms of percentage acceptance of disconnections and resource utilization (bandwidth and buffer) for the volatile mobile computing environment. It is also observed that the intelligent decision by neural network has improved the performance of the system.

关键词： Mobile computing

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