La présente invention concerne un procédé apte à rendre proactif un équipement de réseau, ledit p... more La présente invention concerne un procédé apte à rendre proactif un équipement de réseau, ledit procédé comprenant l'échange de données entre un agent intelligent et ledit équipement de réseau, avantageusement constitué d'au moins un routeur
HAL (Le Centre pour la Communication Scientifique Directe), Sep 1, 2006
A sensor network is composed of a given number of communicating sensors, which aims to collect da... more A sensor network is composed of a given number of communicating sensors, which aims to collect data from their envirenement. When interesting events are detected, information is routed from one node to another and eventually gathered in gateway nodes or base stations. Recently, sensors have become a promising operational technology for underwater environment. For example, they are now able to collect accurately several water quality parameters such as; temperature, chemical substances, water density etc. Another major technological advance of underwater sensors technology is the improvement in their communication capability. For instance, many underwater sensors are now able to exchange data through acoustic waves. As a result of this evolution, underwater sensors could now be organized as an autonomous communicating network. UnderWater Sensors Network (UWSN) is a very recent network topic. Since very few years, it attracts a growing interest from the network community. The underwater context offers to the community the possibility to design and to imagine new applications. Potential applications domain includes, military surveillance (e.g. leak detection), ecology (e.g. water quality and biological monitoring) and public safety (e.g. seismic and tsunami monitoring) etc. Moreover, the particularity of the underwater context (e.g. the long delay related to the acoustic communication technology) offers to the community new interesting challenges. Recent works have addressed some of the identified issues. Since UWSN is a new emerging network topic, up to now, most of researches have mainly focused on fundamental sensor networking problems such as routing protocols, energy minimization, delocalization, and data gathering. But, a lot still have to be done in order to obtain low cost operational UWSN. Suitable deployment of under water sensors for efficient monitoring is among these crucial issues. In the best of our knowledge, deployment of sensors has been addressed mainly in terrestrial networks. Most of works assume a random geographical sensors deployment within a target area. This assumption holds for a non-accessible area
International journal of wireless networks and broadband technologies, Apr 1, 2011
This work focuses on IEEE 802.16e-2005 WiMAX network with Wireless MAN OFDMA physical layer. This... more This work focuses on IEEE 802.16e-2005 WiMAX network with Wireless MAN OFDMA physical layer. This technology, also referred as a mobile WiMAX, aims to offer a quadruple-play service to multiple mobile subscribers (MSS), which can have access anytime and anywhere to various application types, like file downloading, video streaming, emails and VoIP with and without silence suppression. In order to guarantee the quality of service required by these applications, the standard defines five service classes. Namely: UGS for VoIP without silence suppression, rtPS for video streaming, nrtPS for file downloading, ErtPS for voice with silence suppression and
Modern wireless networks can vary both the transmission power and modulation of links. Existing r... more Modern wireless networks can vary both the transmission power and modulation of links. Existing routing protocols do not take transmission power control (TPC) and modulation adaptation (also known as rate adaptation-RA) into account, even though the performance of MANETs can be significantly improved when routing algorithms use link characteristics to build their routes. TPC unaware routing consumes more energy and increases contention, reducing latency and the throughput of the network. Similarly, RA-unaware routes use low data rate links, increasing the utilization of the medium. This paper proposes and evaluates modifications to routing protocols to cope with TPC and RA. The modifications can be applied to either proactive or reactive protocols that employ cost functions. We present an analytical model of end-to-end energy consumption and latency for multi-hop MANETs, which is used to justify the design decisions taken in our routing extensions. Results show that TPC-and RA-aware routing algorithms can improve the end-to-end throughput by up to 30% and the average latency by up to one order of magnitude, while consuming less energy than traditional protocols.
La présente invention concerne un procédé apte à rendre proactif un équipement de réseau, ledit p... more La présente invention concerne un procédé apte à rendre proactif un équipement de réseau, ledit procédé comprenant l'échange de données entre un agent intelligent et ledit équipement de réseau, avantageusement constitué d'au moins un routeur
HAL (Le Centre pour la Communication Scientifique Directe), Sep 1, 2006
A sensor network is composed of a given number of communicating sensors, which aims to collect da... more A sensor network is composed of a given number of communicating sensors, which aims to collect data from their envirenement. When interesting events are detected, information is routed from one node to another and eventually gathered in gateway nodes or base stations. Recently, sensors have become a promising operational technology for underwater environment. For example, they are now able to collect accurately several water quality parameters such as; temperature, chemical substances, water density etc. Another major technological advance of underwater sensors technology is the improvement in their communication capability. For instance, many underwater sensors are now able to exchange data through acoustic waves. As a result of this evolution, underwater sensors could now be organized as an autonomous communicating network. UnderWater Sensors Network (UWSN) is a very recent network topic. Since very few years, it attracts a growing interest from the network community. The underwater context offers to the community the possibility to design and to imagine new applications. Potential applications domain includes, military surveillance (e.g. leak detection), ecology (e.g. water quality and biological monitoring) and public safety (e.g. seismic and tsunami monitoring) etc. Moreover, the particularity of the underwater context (e.g. the long delay related to the acoustic communication technology) offers to the community new interesting challenges. Recent works have addressed some of the identified issues. Since UWSN is a new emerging network topic, up to now, most of researches have mainly focused on fundamental sensor networking problems such as routing protocols, energy minimization, delocalization, and data gathering. But, a lot still have to be done in order to obtain low cost operational UWSN. Suitable deployment of under water sensors for efficient monitoring is among these crucial issues. In the best of our knowledge, deployment of sensors has been addressed mainly in terrestrial networks. Most of works assume a random geographical sensors deployment within a target area. This assumption holds for a non-accessible area
International journal of wireless networks and broadband technologies, Apr 1, 2011
This work focuses on IEEE 802.16e-2005 WiMAX network with Wireless MAN OFDMA physical layer. This... more This work focuses on IEEE 802.16e-2005 WiMAX network with Wireless MAN OFDMA physical layer. This technology, also referred as a mobile WiMAX, aims to offer a quadruple-play service to multiple mobile subscribers (MSS), which can have access anytime and anywhere to various application types, like file downloading, video streaming, emails and VoIP with and without silence suppression. In order to guarantee the quality of service required by these applications, the standard defines five service classes. Namely: UGS for VoIP without silence suppression, rtPS for video streaming, nrtPS for file downloading, ErtPS for voice with silence suppression and
Modern wireless networks can vary both the transmission power and modulation of links. Existing r... more Modern wireless networks can vary both the transmission power and modulation of links. Existing routing protocols do not take transmission power control (TPC) and modulation adaptation (also known as rate adaptation-RA) into account, even though the performance of MANETs can be significantly improved when routing algorithms use link characteristics to build their routes. TPC unaware routing consumes more energy and increases contention, reducing latency and the throughput of the network. Similarly, RA-unaware routes use low data rate links, increasing the utilization of the medium. This paper proposes and evaluates modifications to routing protocols to cope with TPC and RA. The modifications can be applied to either proactive or reactive protocols that employ cost functions. We present an analytical model of end-to-end energy consumption and latency for multi-hop MANETs, which is used to justify the design decisions taken in our routing extensions. Results show that TPC-and RA-aware routing algorithms can improve the end-to-end throughput by up to 30% and the average latency by up to one order of magnitude, while consuming less energy than traditional protocols.
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Papers by Guy Pujolle