In this paper, we propose internetworking strategy of WLAN and MANET. Both WLAN and MANET are based on IEEE 802.11 for MAC layer protocol while they adopt different mode, such as infrastructure and ad-hoc. To support internetworking between different IEEE 802.11 modes, switching algorithm on mobile node is proposed. This algorithm is mainly affected by user’s preference, not only by signal stre...

Rapid advances in wireless networking technologies have made it possible to construct a Mobile Ad hoc Network (MANET) which can be applied in infrastructureless situations. However, due to their inherent characteristics, MANETs are vulnerable to various kinds of attacks which aim at disrupting their routing operations. To develop a strong security scheme to protect against these attacks it is n...

Wireless multi-hop networks consist of a collection of mobile and/or fixed nodes which dynamically exchange data with (or without) reliance on a (any) centralized administration. They are by definition self-organized. The frequent topological changes make multihop routing a crucial issue for these networks. To overcome these problems, new forms of routing schemes are used as the multipath routi...

This paper presents a transparent multi-level routing scheme, named MORHE, that improves the scalability of the OLSR protocol by exploiting the heterogeneous nature of nodes in the network. In our work we try to take an approach that focuses on scenarios where ad hoc technology can be applied, but where we also find nodes in the network with varying capacity. The MORHE protocol makes use of nod...

MANETs is a infrastructure less network in which all the nodes are move independently so there are lot of chance for unsecure the network..for securing the adhoc network we have different-different routing protocols such as AODV, DSR, OLSR, SAR , SRP and Ariadne. And to allow comparison of these secure protocol there is a single common routing protocol i.e. Q Routing. Our contribution in this w...

Nowadays, with the development of networked technologies and the great expansion of video games industry, almost all video games propose a multi-player mode. Development of portables consoles which integrate 802.11 technology offers to people the opportunity to play anywhere, at any time and with anybody. However, wireless networked conditions are not always optimal and directly impact the qual...

In order to transform the perceived speaker identity, a voice conversion system should, a.o., convert the speaker’s prosodic characteristics. When considering pitch contours, most systems only transform the pitch by simple scaling. A stochastic system that transforms pitch contours taking into account multiple pitch parameters has been developed and is described. A pitch transplantation system ...

In this paper, we propose a novel unit concatenation and synthesis method using ABS/OLA sinusoidal model. Phase succession is used in the unit synthesis assuming that the pitch onset time of the rst frame in a given unit is the frame center. In the unit concatenation, the phase succession and interpolation of the sinusoid amplitudes via several frames around the concatenation point is utilized....

Mobile Adhoc Networks (MANETs) emerge as an effective solution for networking Smartphones to enable wireless communication when other alternatives such as cellular networks are not available, e.g. in rural areas. Available MANET routing protocols are either conservative (reactive protocols, e.g. AODV) to control overheads and so do not have any knowledge beyond neighboring nodes, or too expensi...

Résumé. L’alignement d’ontologies met en évidence les relations sémantiques entre les entités de deux ontologies à confronter. L’outil de choix pour l’alignement est une mesure de similarité sur les couples d’entités. Certaines méthodes d’alignement performantes font dépendre la similarité d’un couple de celles des couples voisins. La circularité dans les définitions résultantes est traitée par...