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With the increasing availability of smartphones, tablets and other computing devices, technology consumers have grown accustomed to performing all of their computing tasks anytime, anywhere and on any device. There is a greater need to support ubiquitous connectivity and accommodate users by providing software as network-accessible services. In this paper, we propose a MAS-based approach to adaptive...
Radio frequency identification (RFID) technology has emerged to facilitate tracking items and inexpensively automate the processes of supply chain management. The deployment of RFID technology requires the development of a robust middleware which will manage the huge amount of data captured by RFID antennas and sent by RFID readers. The main objective of this article is to provide insights into how...
In this paper, we investigate the effect of interference on the performance of IEEE 802.11g wireless networks. We study different network configurations and evaluate their corresponding throughput performances with the aid of the ns2 simulator. We also provide recommendations for network deployment in order to minimize interference and improve the quality of service.
Ubiquitous computing has gained momentum over the last years with the expansion of mobile devices. One area of pervasive computing is context-aware systems which are applications designed to react to the constant changes in the environment. This project presents a context aware platform that handles context acquiring and processing and manages the service provisioning. The platform alleviates the...
Ubiquitous computing has gained momentum over the last years with the expansion of mobile devices. One area of pervasive computing is context-aware systems which are applications designed to react to the constant changes in the environment. This paper presents a context aware platform that handles context acquiring, processing and service provisioning management. The platform alleviates the process...
Radio Frequency Identification (RFID) has become a popular identification technology in a number of application areas such as supply chain management. A dedicated middleware solution is required to achieve the maximum benefits of RFID technology. The middleware components serve to abstract the communication between the middleware and the different types of sensing devices on one hand, and the middleware...
Mobile and ubiquitous computing have increased the need for mobile users to expect accessing preferred services, whenever they want and wherever they are. Users do not have to explicitly specify and configure their working environment each time they move from one location to another. The necessary adaptation to cope with the changing environment should be initiated by services rather than by users...
When GSM was introduced in the early 90's, it was considered an over specified system. Nowadays, it is obvious that the whole range of services is widely in use. In addition, performance is degrading due to the rapidly increasing number of mobile subscribers, numbering over 2.9 billion subscribers around the world. The performance of cellular networks is the most important issue concerning their operators...
Nowadays, Radio Frequency Identification (RFID) is a popular automatic wireless identification technology, and provides promising benefits in a number of application areas such as supply chain management. Though RFID technology has attracted a significant attention due to the convergence of lower cost and increased hardware capabilities, there still exist major hurdles for the practical realization...
The emergence of ubiquitous computing, enabled by the availability of portable devices and advances in (wireless) networking technologies , has increased the need for personalized and adaptive services in mobile environments. Making use of context is essential to cope and timely react to changes in such environments and hence achieve adaptability, reliability, and seamless service provisioning. This...
In this paper, we propose a dynamic channel-assignment algorithm which minimizes the total interferences between access points (APs) of a Wireless Local Area Network (WLAN), while maintaining the Signal to Interferences Ratio (SIR) bigger than a certain threshold for all users. The algorithm initializes the channel assignment at the APs, and calculates the SIR for each user using Integer Linear Programming...
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