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Wireless sensor networks (WSN) are widely used to sense and measure physical conditions for different purposes and within different regions. However due to the limited lifetime of the sensor's energy source, many efforts are made to design energy efficient WSN. As a result, many techniques were presented in the literature such as power adaptation, sleep and wake-up, and scheduling in order to enhance...
Tenants assume various roles in the enterprise data center networks, requiring a differentiated Quality of Service (QoS), data quality and isolation guarantees among them. Traditionally, data storage and processing are handled in either distributed, or centralized manner. While distributed execution offers a higher horizontal scalability, it often comes with a trade-off of lack of centralized control,...
The development and deployment of the Locator/ Identifier Separation Protocol (LISP), a paradigm introducing several benefits to the Internet architecture, is becoming widespread thanks to initiatives like the LISP-Lab project. Yet, LISP remains a relatively recent technology, hence, its actual performance when integrated with the current Internet remains still to be assessed. To tackle this issue...
In this work we tackle the bus stop selection step for the School Bus Routing Problem (SBRP). Our goal is to minimize the number of bus stops in order to assign all students to a bus stop respecting a home-to-bus-stop walking distance constraint. Our strategy creates a large number of possible bus stops points in a road network and uses a pseudo-random constructive heuristic algorithm to assign students...
In recent years, the number of requests to transfer large files via large high-speed computer networks has been increasing rapidly. Typically, these requests are handled in the “best effort” manner and resulting in unpredictable completion times. In this paper, we consider a model where a transfer request either must be completed by a user-specified deadline or must be rejected if its deadline cannot...
In Vehicular Ad Hoc Networks (VANETs),vehicles are driving along highways can be grouped into clusters to facilitate good communication. The design of the clusters such as size and geographical span, has significant impacts on communication quality. The real-time communication in Vehicular Ad Hoc Networks enables distributed applications among vehicular nodes in infrastructure-less areas. The main...
Ad hoc On Demand Distance Vector (AODV) routing is an extensively accepted routing protocol for Mobile Ad hoc Network (MANET). The inadequacy of security considerations in the design of AODV makes it vulnerable to black hole attack. In a black hole attack, malicious nodes attract data packets and drop them instead of forwarding. Among the existing black hole detection schemes, just a few strategies...
In wireless ad-hoc networks, the spectrum will not be efficiently used. It will be subdivided into a number of frequency bands and allocated to use by the licensed users for different applications. The spectrum will be unused if it is not used by the licensed users. Cognitive radio technology overcomes this problem. The Cognitive Radio Network provides the fesibility that the unused licensed spectrum...
Adhoc wireless networks are defined as the category of wireless networks that utilize multihop radio relaying and are capable of operating without the support of any fixed infrastructure and hence they are also called infrastructureless networks. This type of network allows for spontaneous communication without previous planning between mobile devices. A variety of routing protocols for adhoc wireless...
Spectrum sensing is one of the most mandatory mechanisms of Cognitive Radio (CR) to find the unused Spectrum. Spectrum sensing has renewed on a very active scrutiny area over recent years. As it is one of the most important tasks performed using cognitive radio and the implementation of the other functions of the cognitive radio is based on the spectrum sensing. So it is mandatory for cognitive radio...
MPLS(Multi Protocol Label Switching) is an emerging technology [1] which has started attracting all the service provider networks with its exceptional and admirable features. VPN(Virtual Private Network) is one of its most popular feature which carries traffic securely and privately from customer's one end to another through the service provider's network. However, in this case the CE(Customer Edge)...
Multiprotocol Label Switching(MPLS) lends efficiency to very large networks, and is the most used transport technology for service provider networks to support multiple customers. Customers connected to a service provider's network demand for secure, reliable, private and ultra fast connections over the globe. This paper describes designing of MPLS VPN(Virtual Private Network) along with dedicated...
This paper is concerned with a crucial problem of MANET which is congestion control (CongClt). CongClt can be described as a mechanism used to control congestion (Cong) and keep the traffic below the capacity of the network. Many approaches have been proposed to overcome CongClt in Ethernet as well as in MANET. Controlling the Cong in MANET is quite difficult due to its fundamental characteristics...
The limited battery supply of a sensor node is one of the most important factors that limit the lifetime of the WSNs. As a consequence, increasing the lifetime of WSNs through energy efficient mechanisms has become a challenging research area. Previous studies have shown that instead of implementing direct transmission or multi-hop routing, clustering can significantly improve the total energy dissipation...
The aim of this research is to enhance the performance of a traditional Open Shortest Path First (OSPF) routing protocol network by adding some features of the Software Defined Networking (SDN) in a modified approach to improve some network's performance metrics like link congestion and bandwidth utilization. The improvement of those metrics leads to an improvement in the total throughput of the network...
DSR protocol is less considered for practical application due to its more limitations against other routing protocols. Modification in DSR protocol can make it considerable and it can improve energy efficiency to enhance lifetime of battery operated mobile adhoc networks. This paper proposes the modification for route discovery mechanism in normal DSR protocol for energy efficient route establishment...
Unexpected road traffic congestion caused by en-route events, such as car crashes, road works, unplanned parades etc., is a real challenge in today's urban road networks as it considerably increases the drivers' travel time and decreases travel time reliability. To face this challenge, this paper extends our previous work named Next Road Rerouting (NRR) by designing a novel vehicle rerouting strategy...
Store-carry-and-forward is extensively used in vehicular environments for many and varied purposes, including routing, disseminating, downloading, uploading, or offloading delay-tolerant content. The performance gain of store-carry-and-forward over traditional connected forwarding is primarily determined by the fact that it grants a much improved network connectivity. Indeed, by letting vehicles physically...
This paper introduces the electric Modular Fleet Size and Mix Vehicle Routing Problem with Time Windows (eM-FSMVRPTW), which deals with introducing new types of electric vehicles for urban freight delivery taking into account the possibility of recharging at a customer location. These electric vehicles differ from battery electric vehicles because their modules are autonomous in terms of consumption...
Power consumption and CO2 emission have become a major concern over the last few years. Several recent studies have shown that servers and network equipments consume up to 45% of the energy consumption of data centers [1]. Software-defined networking is a new networking paradigm that decouples the control and data functionalities; thus, makes networks easily manageable and programmable. In software-defined...
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