The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Wireless local area networks (WLANs) are increasingly popular because of their flexibility. This spreading of WLANs comes with an increasing use of multimedia applications. Such applications are bandwidth sensitive and require a quality of service (QoS) that guarantees high performance transmission of continuous data. This requirement is the focus of the new enhanced IEEE 802.11e standard protocol...
Acoustic target tracking is one of the application areas of wireless sensor networks (WSNs) in which time synchronization error influences the results of target tracking. Algebraic numerical methods are used to solve simultaneous equations of target tracking. A more efficient approach is to use algebraic geometry for solving simultaneous equations of target tracking, but the analytic study of error...
Mobile ad-hoc networks have emerged as an efficient solution for communicating in critical scenarios, such as emergency and rescue operations. However, the infrastructure-less and dynamic nature of these networks make them vulnerable to network partitions, which directly affects the data delivery process. To mitigate the impact of partitioning, we introduce a new architecture that employs sensors...
The design of energy-efficient protocols for wireless sensor networks (WSNs) is a crucial problem as energy is a stringent resource in these networks. In this paper, we propose an energy-aware routing protocol using a new approach. To be more specific, we present a protocol called high power short distance protocol (HPSD). HPSD is a node-based protocol that selects the route to the base station (BS)...
In this paper, we propose an efficient routing algorithm for large scale cluster-based wireless sensor networks. The technique uses two routing levels. In the first level (intra-cluster), cluster members send data directly to their cluster head. In the second level (inter-cluster), the cluster heads use ant colony optimization (ACO) algorithm, which is a biologically inspired paradigm for optimization...
We implement and test four RFID security protocols: strong private authentication protocol, efficient mutual-authentication protocol, Dimitriou's lightweight protocol, and advanced semi-randomized access control, by emulating the RFID system. Then, we analyze the results to provide an evaluation of each protocol. RFID tags are very limited in terms of processing power, and cannot perform complex computations...
The heavy traffic introduced by Gigabit networks can result in a significant performance degradation of network hosts. This degradation happens as a result of the interrupt overhead associated with the high rate of packet arrivals. NAPI, a packet reception mechanism integrated into the latest version of Linux networking subsystem, was designed to improve Linux performance to suit today's Gigabit traffic...
In this paper, a new data replication protocol for disaster recovery planning (DRP-DRP) is proposed. The primary objective for developing DRP-DRP was to overcome the difficulties associated with the existing data replication protocols, namely synchronous and asynchronous protocols. The asynchronous protocol suffers from high replication latency and inconsistency of the replicated data, whereas the...
Broadcast mechanisms are widely used in self-organizing wireless networks as support for other network layer protocols, in this paper we investigate the broadcast techniques proposed in literature for vehicular ad hoc network (VANET). For the safety applications the broadcast protocol has to guaranty the performance and the reliability. In this paper, we propose an implementation the minimum connected...
Multicast service of multimedia data messages are attractive network application. In conventional TCP/IP computer network, all functions of group membership management, routing and bandwidth reservation are required to be supported by all intermediate routers and availability of the multicast service is not always enough for network users. The overlay multicast is an expected solution where only logical...
This paper discusses the design and implementation of a PDA-based health monitoring system. The system integrates various technologies to provide individuals with a portable, light weight monitoring unit that can assist patients in leading a healthy and independent life without risks or confinement to medical facilities. The results were encouraging and warrant further exploration of the proposed...
This paper presents an advanced implementation of a virtual environment to develop and test communication protocols for multi-agent systems. This because virtual environments provide 3d simulation tools that allow for more realistic simulations. Embedding human capability into the control system software, the work considers the application of a multiple robots communication system. Current implementations...
Digital watermarks are used to prevent the possession and transmission of copyright intellectual property over the Internet. Such an unauthorized duplication and distribution of digital contents are achieved by inserting unique digital watermark into each of the multimedia content to be sold. When an illegal replica is found, the responsible distributor, the buyer or seller, can be traced using a...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.