Design and Implement Voice Application over Ad Hoc Networks Using UPnP

The traditional voice service was based on circuit-switched network architecture. It has been deployed on the packet-switched based network since Session Initial Protocol (SIP) became the de facto standard for Voice over IP (VoIP) in 1999. Since then voice service has become simple and flexible. Another important technology driving voice service more popularity is mobile Ad Hoc networks (MANET). Most of internet applications or services such as VoIP or instant messaging (IM) are designed with client/server architecture. This design requires the initiator of communication sessions to know the address of counterpart prior to building a connection. With Ad Hoc networks, there is no such requirement at all. In this thesis, we will design an Ad Hoc architecture using Universal Plug and Play (UPnP) protocol, and implement a simple voice application over such network. By definition infrastructure is unavailable in Ad Hoc network, we will also present the solution of how to enable SIP-based session setup on Ad Hoc network. This thesis consists of two parts. The first part is the theoretical part. In this part, we will review the technologies related to our design and implementation. The second part is the system implementation and validation part. We will test our implementation with the Nokia Internet Tablet N810/N800s for various scenarios

MAGDA: A Mobile Agent based Grid Architecture

Mobile agents mean both a technology and a programming paradigm. They allow for a flexible approach which can alleviate a number of issues present in distributed and Grid-based systems, by means of features such as migration, cloning, messaging and other provided mechanisms. In this paper we describe an architecture (MAGDA – Mobile Agent based Grid Architecture) we have designed and we are currently developing to support programming and execution of mobile agent based application upon Grid systems

Regional construction sector: sector implementation plan (SIP)

This Sector Implementation Plan (SIP) forms an integral part of the Regional Economic Strategy (RES), acting as a high level plan for the region’s construction sector, and providing an overview of the strategic actions and interventions which will deliver the outcomes required to achieve progress against each key challenge

A Low Cost Two-Tier Architecture Model For High Availability Clusters Application Load Balancing

This article proposes a design and implementation of a low cost two-tier architecture model for high availability cluster combined with load-balancing and shared storage technology to achieve desired scale of three-tier architecture for application load balancing e.g. web servers. The research work proposes a design that physically omits Network File System (NFS) server nodes and implements NFS server functionalities within the cluster nodes, through Red Hat Cluster Suite (RHCS) with High Availability (HA) proxy load balancing technologies. In order to achieve a low-cost implementation in terms of investment in hardware and computing solutions, the proposed architecture will be beneficial. This system intends to provide steady service despite any system components fails due to uncertainly such as network system, storage and applications.Comment: Load balancing, high availability cluster, web server cluster