Search results for "working"
showing 10 items of 2747 documents
Smart Network Selection and Packet Loss Improvement during Handover in Heterogeneous Environment
2013
BEST PAPER AWARD; International audience; Seamless Handover between networks in heterogeneous environment is essential to guarantee end-to-end QoS for mobile users. A key requirement is the ability to select the next best network. Currently, the implementation of the IEEE 802.21 standard by National Institute of Standards and Technology (NIST) considers only the signal strength as a parameter to determine the best network. In this paper, we propose including additional parameters such as available bandwidth, mobile node speed and type of network during selecting a new network to improve the QoS for mobile user's application. The results of the experiments that we performed using Network Sim…
Integrated Fuzzy Solution for Network Selection using MIH in Heterogeneous Environment
2013
ISSN: 1942-2644; International audience; Seamless handover between networks in heterogeneous environment is essential to guarantee end-to- end QoS for mobile users. A key requirement is the ability to select seamlessly the next best network. Currently, the implementation of the selection algorithm of the IEEE 802.21 standard by National Institute of Standards and Technology considers only the signal strength as a parameter to select the best destination network. In this paper, we improve the implementation of the existing selection algorithm by proposing an integrated solution to select the best destination network. Our proposed solution consists of proposing a Multi Criteria Selection Algo…
Autonomous base manager based on cognitive radio systems dedicated to 5G networks
2019
International audience
IP-Based Mobility Management and Handover Latency Measurement in heterogeneous environments
2017
International audience; One serious concern in the ubiquitous networks is the seamless vertical handover management between different wireless technologies. To meet this challenge, many standardization organizations proposed different protocols at different layers of the protocol stack. The Internet Engineering Task Force (IETF) has different groups working on mobility at IP level in order to enhance mobile IPv4 and mobile IPv6 with different variants: HMIPv6 (Hierarchical Mobile IPv6), FMIPv6 (Fast Mobile IPv6) and PMIPv6 (Proxy Mobile IPv6) for seamless handover. Moreover, the IEEE 802.21 standard provides another framework for seamless handover. The 3GPP standard provides the Access Netw…
HQMR: Hybrid QoS based Routing Protocol for Wireless Mesh Environment
2015
International audience; Wireless Mesh Networks (WMNs) have been attracting more and more interest from both academic and industrial environments for their seamless broadband connectivity to Internet networks. Besides, providing QoS guarantees for real-time and streaming applications such as Voice over IP (VoIP) and Video on Demand (VoD) is a challenging issue in such environment. Thus, we propose a novel QoS based routing protocol for wireless mesh infrastructure, called Hybrid QoS Mesh Routing (HQMR). Moreover, a clustering algorithm is developed to enhance scalability issues within the mesh infrastructure. HQMR is composed of two routing sub-protocols: a reactive routing protocol for intr…
Le mobilier archéologique de l’habitat du Hallstatt final à Écuelles « Charmoy » (Seine-et-Marne)
2005
The Ecuelles Charmoy site is one of the first Late Hallstatt settlements to be discovered on the edge of the plateau that dominates the Seine-Yonne confluence. In use for only a short period at the end of the 5th and during the first half of the 4th century BC, the site includes postholed buildings, storage pits and other structures in an organized domestic space. The pottery, especially the painted ware, is particularly abundant in the storage pits and constitutes a reference of local ware and its production. Also the traces of metalworking found on the site, be it the reduction of iron or the crafting of moulded bronze jewellery, renews our knowledge of the function and vocation of such a…
La fosse 264 du Néolithique récent de Vignely « La Noue Fénard » (Seine-et-Marne)
2014
A pit dating to the Recent Neolithic was discovered at Vignely, la Noue-Fenard during work on a Middle Neolithicenclosure that backed on to an ancient bank of the river Marne. The cylindrical structure, the primary function of which has not yetbeen determined, was used as a refuse pit and contained a particularly rich collection of finds, notably wild animal bones, stoneobjects, bone tools, grinding tools and pottery. The study of the finds has revealed activities directly relating to game hunting,exploiting animal resources for meat, bone, fur, … The objects show marked regional affinities with the collective tomb of Vignely,la Porte-aux-Bergers and the Isles-lès-Meldeuses ensemble. They a…
Housekeepers lost in the Land of Labor Market Segmentation
2007
07022 - 13 p.; This communication analyses the role that the main social actors, employers, trade unions and the French government play in labour market regulations, especially in working conditions, for feminine low wage workers. Labor market segmentation and the dual market theory (Doeringer and Piore, 1971), with on one hand qualified workers employed in attractive and stable positions, and on the other hand manpower in low-paid and insecure jobs, often in back-breaking working conditions, are not new. However, they have recently reappeared in the situation of housekeepers in the French hotel industry, where there are particularly few chances of career ladders, and on the contrary, there…
Target 5G visible light positioning signal subcarrier extraction method using particle swarm optimization algorithm
2021
International audience; With the explosive growth of demand for Internet of Things (IoT) applications and the increasing dependence of users on wireless connections, indoor location based service(LBS) under 5G-Public-Private Partnership (5G-PPP) using cases have received more attention and get rapid development. Thanks to the safty, security and customization of 5G network pointed by 5G forum white paper, indoor positioning systems using unified 5G New Radio (NR) signals have become the focus of the next generation of visible light positioning (VLP) systems. In 5G New Radio(NR) frame, totally 192 subcarriers are used to carry positioning reference signal(PRS). In order to improve the positi…
Improving IoT Communications Based on Smart Routing Algorithms
2018
International audience; Due to the recorded success by Internet of Things (IoT) technology, more and more domains use it as a communications and exchange network such as e-health, smart cities, vehicles, etc. IoT don’t stop integrating an important number of components and objects that are characterized by their complexity and heterogeneity. Such constraints make the existing routings protocols unsuitable for IoT communications. To accomplish all the expected tasks and satisfy the user services, it is important to guarantee a quality of communication that answers to the requirements of the various applications in terms of data and processing (availability, integrity, efficiency, etc.). The …