Pascal Lorenz
University of Haute-Alsace, France
Title: Multimedia communication protocols in sensors Ad hoc networks
Biography
Biography: Pascal Lorenz
Abstract
Ad hoc Sensor Network (ASNs) is distributed systems which consist of wireless mobile or static sensors. In order to communicate with each other, each mobile unit must act as a router and a terminal, and must retransmit packets from other mobile units. Due to their great flexibility of use, good robustness and very quick deployment, such networks can be used in many areas. The applications developed in such areas use especially multimedia and real-time data (images, video, etc.). ASN’s users would like to have the same services as those offered by wired networks. In other terms, the applications used in wired networks must be functional in ASNs, especially multimedia and real-time applications (video conferencing, internet telephony, video on demand etc.). The limited sizes of the sensors make complex, the support of such applications which require significant resources like the energy, bandwidth, delay, losses rate, jitter, QoS etc. Many factors, at different levels of the network (physical, MAC, routing and transport) reduce the performance of these networks. We then see appeared specificity of some protocols such as MAC, routing and transport with the support of multimedia applications and data.