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.
Heterogeneous Mobile Adhoc Network still encounters problem in dedicated services with robust link establishment. The reasons are not only conventional factor e.g. energy consumption, excessive bandwidth utilization, dynamic topology but also unconventional factor e.g. protocol differences. To a large extent, the evolution of Delay Tolerant Network has been successful in addressing the routing issues...
In this paper, we develop and study a model to identify cost optimized Multi-Path Entity (MPE) locations in the context of hybrid fixed and mobile access for a large German telecom operator. We consider the operator's network architecture as well as the related cost components including network elements and nodes. The objective is to support future network planning with a techno-economic sensitivity...
When stricken by a large-scale disaster, the efficiency of disaster response operation is very critical to lifesaving. However, communication systems, such as cellular networks, usually crashed due to various causes making coordination among disorganized disaster responders extremely difficult. Unfortunately, rapid deployment of many existing emergency communication systems relies on a good transportation...
Visible light communication systems have gained prominence as a method for underwater communications. In this paper, we investigate a novel underwater visible light network mechanism that utilises a honeycomb-like topology that we call 'spider-web', and algorithms to perform reliable, energy efficient communication for underwater visible light sensor networks. The spider-web topology idea is inspired...
The dynamic environment of hybrid mobile and fixed wireless networks used in military operations poses significant challenges in the efficient provisioning of software functionality to application clients. With their transient topology, the software services hosted on mobile nodes may become temporarily unavailable or the cost of transferring data across the network may become too high. To address...
Low-Power and Lossy-Network (LLN) are usually composed of static nodes, but the increase demand for mobility in mobile robotic and dynamic environment raises the question how the a routing protocol for Low-Power and Lossy-Networks such as (RPL) would perform in where a mobile sink is deployed. In this paper we investigate and evaluate the behaviour of the RPL protocol in fixed and mobile sink environments...
Orthogonal frequency-division multiple-access (OFDMA) small-cell networks of next-generation Long-Term Evolution (LTE-Advanced) standard, is perhaps a key factor to efficiently provide beneficial usage of expensive radio resources, while maintaining adequate network capacity. Network capacity is without doubt a critical resource for LTE networks. At the same time, real-time multimedia transmission...
In military operation, sharing information among troops is essential issue for effective combats and minimal causalities. So these tendencies take militaries to information centric combat. And MANET has proper properties for this military operation such as infrastructure less, effective data transfer and flexible for changeable topology. Routing protocol is key factor of MANET. So to apply MANET into...
This paper proposes a novel inductive contactless energy transfer system for residential distribution networks. The system is based on a resonant inverter with sliding transformers, allowing high flexibility (the connection point of the loads is movable) and high safety (electrical shocks are avoided). A new resonant topology for driving the sliding transformers is proposed which behaves as an AC...
We formalize a BBU placement problem for C-RAN infrastructures based on WDM aggregation networks, considering both OTN and Overlay for fronthaul transport. Numerical simulations obtained over realistic instances show that Overlay enables higher BBU consolidation (fewer BBU hotel sites).
Cell breathing is a mechanism used in cellular networks since many years, which is now proposed for energy efficient purposes. By using this technique, it is possible to save energy during low traffic periods by switching unnecessary BSs off whereas the cell topology is re-adapted supported on some few BSs active. In this article, we analyze a multi-size approach which provide means for an enhanced...
Big-data is a popular term in the field of information and communication technology. Wireless Sensor Networks (WSN) is one of the eminent contributors of big data. WSN contains numerous sensor nodes that cooperatively monitor an environment. Each network consists of sensor node, memory, and communication device. Data generated by single sensor node is small but data generated by distributed sensor...
Novel antenna design technologies are devised at 28 GHz to realize vertical and horizontal polarizations and its combined radiation characteristics using ultra-thin printed circuit board (PCB) substrates. Details of the design methodologies, simulation and measurement results are presented and discussed in relation to the targeted mmWave 5G mobile application.
Due to the limited node degree and fragile links, design and management of free space optical (FSO) networks is still a great challenge. In this paper, based on a tiered mobile FSO network model, a localized Delaunay triangulation (LDT) algorithm for the topology control of the upper tier is proposed. Then we study how the lower tier is supported by the upper tier. An effective dynamic multipoint-to-point...
In this paper, we present preliminary results from a performance comparison between the two multicast routing protocols ODMRP and SMF. While SMF uses a proactive selection of forwarding nodes, ODMRP is a reactive approach to multicast routing. For the evaluation, we use an two-step approach. First, we perform emulation-based measurements in a virtualized test bed utilizing the ns-3 IEEE 802.11 model...
Despite the agreement on the Wireless Mesh Networks impact as a flexible way to provide Internet connections with low cost, they still suffer from some limits that degrade their performance, resulting from their Wireless/multihop nature. Using multiple paths principale and an appropriate Channels Assignment process may confront one of the most encountered problems in wireless communication field,...
This paper introduces and analyzes a novel mobile access coordinated wireless sensor network (MC-WSN) architecture. In conventional sensor networks with mobile access points (SENMA), the mobile access (MA) points traverse the network to collect information directly from individual sensors. While simplifying the routing process, a major limitation with SENMA is that data transmission is limited by...
Fixed and Mobile Convergence (FMC) is a key stake for operators in the perspective of 5G networks. This paper analyzes the expected role of optical networks for convergence and integration of fixed and mobile infrastructures.
This paper considers event-triggered control for the centroidal Voronoi coverage problem. In the proposed method, each agent updates its input when the error between the state and the centroid of its Voronoi cell at the last trigger time and those at the current time exceeds a threshold. We show that agents achieve the centroidal Voronoi coverage by the proposed dynamics in a distributed way. We also...
Since traffic load in mobile networks typically changes significantly over time, time-varying routing, where routing changes in certain time intervals, seems an obvious solution. Yet multiple researchers have claimed independently in the past, that time-varying routing does not lead to worthwhile benefits given its overhead. In this paper, we study this issue in a systematic way. We argue that previous...
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.