Reliable channel estimation is indispensable for orthogonal frequency-division multiplexing (OFDM) systems employing coherent detection and adaptive loading in order to achieve high data rate communications. Several options exist in practical OFDM systems—including training symbols, cyclic prefix, virtual carriers, pilot tones, and receiver diversity—to facilitate channel estimation. In this pa...

Cloud computing is one of the most important technology of networking which is widely used in these days. Cloud computing has some security issue also. There are several types of attacks which can be launch on cloud very easily and has many serious effects on the network. This paper discussed the proposed scheme to overcome the adversary effects of virtual side channel effects. Keywords— Privat...

In this paper, a forecasting-based dynamic virtual channel allocation technique for reducing the power consumption of network on chips is introduced. Based on the network traffic as well as past link and total virtual channel utilizations, the technique dynamically forecasts the number of virtual channels that should be active. It is based on an exponential smoothing forecasting method that fil...

Dally [2] has developed a model to investigate the behavior of virtual channel multiplexing which have been widely employed in the subsequent analytical models of most routing algorithms suggested in the literature. It is indispensable to modify Dally’s model in order to evaluate the performance of channel multiplexing in more general networks where restrictions such as timing constraints of in...

Abstract: This contribution proposes an algorithm for aggregating ABR virtual channel connections (VCCs) onto ABR virtual path connections (VPCs). ABR VPCs are particularly useful for connecting enterprise sites over the Internet, providing a virtual private network (VPN). The VPC/VCC hierarchy is also important for supporting Internet di erentiated services over ATM. The coupling between the o...

We would like to thank all the people who worked hard to make this workshop a success. First and foremost we would like to express our gratitude to all the members of the Technical Program Committee and the reviewers for their diligent effort in providing high quality reviews in a timely manner. We would also like to thank the LCN 2009 Organizing Committee and the SenseApp 2009 Steering Committ...

Welcome to the 4th International Workshop on Wireless Local Networks (WLN) 2004 which is being held jointly with the 29th Annual IEEE Conference on Local Computer Networks (LCN) 2004, and welcome to Tampa/Florida! Apart from your participation at the workshop and the conference, we hope you will find some spare time to explore the wonderful area of Tampa Bay and the (hopefully) nice weather at ...

A common scheme for preventing deadlock in networks is the virtual channel method of Dally and Seitz [DS87]. Due to the nature of this scheme, an otherwise completely uniform network will have non-uniformities introduced into it. The variations introduce several e ects, ranging from limitations on overall network performance to di erences in observed network characteristics from node to node an...

Although tremendous progress has been made on the past years on channel estimation in ofdm systems still it is considered as area of concern in wireless communication. A novel channel estimation technique with virtual sub carriers is proposed in this work namely a low-complexity but near-optimal DFT-based channel estimator with leakage nulling is proposed for OFDM systems using virtual subcarri...