In order to cope with the environmental impacts onBluetooth data transmission diversity techniques wereexamined. A Bluetooth antenna diversity demonstratorwas developed. Extensive experimental investigationsdocumenting the significant improvements of ...

Abstract¿Providing up-to-date input to users' applications is an important data management problem for a distributed computing environment, where each data storage location and intermediate node may have specific data available, storage limitations, ...

Providing differentiated Quality of Service (QoS) over unreliable wireless channels is an important challenge for supporting several future applications. We analyze a model that has been proposed to describe the QoS requirements by four criteria: traffic ...

Wireless sensor networks (WSNs) form a unique class of ad hoc networks consisting of heterogeneous but highly resource-constrained devices that can sense their environment and report sensed data to designated nodes in the network. We present a holistic ...

In this talk we study the issue of cross-layer design for rate control in multihop wireless networks. We have developed an optimal cross-layered rate control scheme that jointly computes both the rate allocation and the stabilizing schedule that controls ...

The Convex C220 and C240 supercomputers are a family of 64-bit multiprocessors, tightly coupled through a shared main memory. Each processor contains an integrated vector processor. All processor features, including the vector processor, are controlled ...

Generating pseudo random objects is one of the key issues in computer simulation of complex systems. Most earlier simulation systems include procedures for the generation of independent and identically distributed random variables or some classical random ...

The most important technical challenge for the realization of 4G mobile networks is twofold: (a) to overcome the highly frequency-selective fading channel and (b) to significantly reduce the transmit power from mobile terminals. Recently, it has been ...

In order to create secure and dependable systems and information intelligence, it is a major challenge to determine the security level of the network. This security level depends on a number of dynamically changing factors including emerging of new vulnerabilities ...

The Internet offers a host of high-quality research material in computer science---and, unfortunately, some very low quality resources as well. As part of learning the research process, students should be taught to critically evaluate the quality of ...

Vendors have started releasing the first products certified as complying with the IEEE's fast, long-range mobile WiMax standard. Proponents hope mobile WiMax will compete with cellular, Wi-Fi, and last-mile Internet-access technologies

Dynamic data replication improves data accessibility in mobile ad hoc networks. In our previous works, we proposed few methods to manage locations of replicas and efficiently forward access requests to the locations. In this paper, we extend these methods ...

As service providers move more applications to their IP/MPLS (Multiple Protocol Label Switching [1]) backbone networks, rapid restoration upon failure becomes more and more crucial. Recently MPLS fast reroute has attracted lots of attention as it was ...

Current FPGA soft processor systems use dedicated hardware modules or accelerators to speed up data-parallel applications. This work explores an alternative approach of using a soft vector processor as a general-purpose accelerator. The approach has ...

This paper considers the genetic problem of detecting in the presence of additive noise, which one from a set of known signals has been received. In place of the classical matched filter (MF) receiver we propose a modified receiver. When the transmitted ...