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23 results on '"Chiraz Houaidia"'

15. Dynamic Slotted Network Coding Protocol

Author

Mohammed Aissaoui, Chiraz Houaidia, Adrien van Den Bossche, Thierry Val, Leïla Saidane, and Val, Thierry

Subjects
Physical-Layer Network Coding, Wireless Networks, [INFO.INFO-NI] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Scheduling, Two-Way Relay Channel, Network Coding
Abstract

Network Coding (NC) is a technique that enhances the performance of wireless networks by increasing the throughput and decreasing the delay. The basic idea is to exploit the mixing of signals that occurs naturally when end nodes transmit at the same time. The main challenge stands for a medium access scheduling allowing synchronized coordination between the nodes involved in that coded transmission. Most of the proposed Medium Access Control (MAC) protocols are based either on the CSMA/CA or the TDMA scheduling. The CSMA/CA based protocols suffer from synchronization issues, while the TDMA based protocols suffer from the delay due to their static design. This paper introduces a new NC MAC protocol called Dynamic Slotted Network Coding Protocol (DSNCP) based on a time scheduling to avoid the synchronization issue and uses a new design that makes the data slot assignments dynamic in order to reduce the delay. Simulation results show a significant performance gain of the proposed DSNCP compared to CSMA/CA and static TDMA protocols in terms of throughput and delay. In some scenarios, the throughput gain of the DSNCP could reach 130% and 100% compared to TDMA and CSMA/CA, respectively, and the delay gain could reach 80% and 40% compared to TDMA and CSMA/CA, respectively.

Published
2022

17. Inter-flow and intra-flow interference mitigation routing in wireless mesh networks

Author

Thierry Val, Hanen Idoudi, Leila Azouz Saidane, Chiraz Houaidia, Adrien van den Bossche, Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole Nationale des Sciences de l'Informatique - ENSI (TUNISIA), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Institut de Recherche en Informatique de Toulouse - IRIT (Toulouse, France), Université de la Manouba [Tunisie] (UMA), École Nationale des Sciences de l'Informatique [Manouba] (ENSI), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université Toulouse - Jean Jaurès (UT2J), Université de la Manouba [Tunisie], Ecole Nationale des sciences de l'informatique [Manouba] ( ENSI ), Institut de recherche en informatique de Toulouse ( IRIT ), Institut National Polytechnique [Toulouse] ( INP ) -Université Toulouse 1 Capitole ( UT1 ) -Université Toulouse - Jean Jaurès ( UT2J ) -Université Paul Sabatier - Toulouse 3 ( UPS ) -Centre National de la Recherche Scientifique ( CNRS ), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Distributed computing, Routing table, [ INFO.INFO-NI ] Computer Science [cs]/Networking and Internet Architecture [cs.NI], Enhanced Interior Gateway Routing Protocol, Réseaux et télécommunications, Geographic routing, 02 engineering and technology, Metrics, Routing Information Protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0508 media and communications, Architectures Matérielles, 0202 electrical engineering, electronic engineering, information engineering, Computer Science::Networking and Internet Architecture, [ INFO.INFO-ES ] Computer Science [cs]/Embedded Systems, Hierarchical routing, Static routing, Zone Routing Protocol, Wireless mesh network, Quality of service, 05 social sciences, Path vector protocol, Systèmes embarqués, Link-state routing protocol, Multipath routing, [ INFO.INFO-OS ] Computer Science [cs]/Operating Systems [cs.OS], Hazy Sighted Link State Routing Protocol, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, Computer network, Routing protocol, Computer Networks and Communications, Equal-cost multi-path routing, Système d'exploitation, Wireless Routing Protocol, QoS, 050801 communication & media studies, Throughput, Available bandwidth, Destination-Sequenced Distance Vector routing, Routing, business.industry, Policy-based routing, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 020206 networking & telecommunications, Optimized Link State Routing Protocol, Routing domain, [ INFO.INFO-AR ] Computer Science [cs]/Hardware Architecture [cs.AR], [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], Conflict graph, business, Interference
Abstract

International audience; In this paper, we address the problem of QoS support in an heterogeneous multi-rate wireless mesh network. We propose a new routing metric that provides information about link quality, based on PHY and MAC characteristics, including the link availability, the loss rate and the available bandwidth. This metric allows to apprehend inter-flow interferences and avoid bottleneck formation by balancing traffic load on the links. Based on the conflict graph model and calculation of maximal cliques, we define a method to estimate the available bandwidth of a path which considers, in addition, intra-flow interferences. Finally, we propose a routing protocol that supports this metric and we study by simulation its performances compared to different existing routing metrics and protocols. The results revealed the ability of our protocol (LARM) to support the network scalability as well as its ability to choose routes with high throughput and limited delay, thus, better delivery of data traffic.

Published
2017
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18. Impact des interférences dans un réseau sans fil multi-sauts

Author

Chiraz Houaidia, Adrien van den Bossche, Hanen Idoudi, Thierry VAL, Leila Azzouz Saidane, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, École Nationale des Sciences de l'Informatique [Manouba] (ENSI), Université de la Manouba [Tunisie] (UMA), and Université Toulouse - Jean Jaurès (UT2J)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Interférence intra-flux, Système d'exploitation, Réseaux et télécommunications, Systèmes embarqués, Sauts, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, Interférence inter-flux, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, Réseau sans fil multi, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], Bande passante
Abstract

National audience; Ce papier introduit le problème des interférences dans les réseaux sans fil multi-sauts. Nous nous adressons à deux types d'interférences : intra-flux et inter-flux et nous discutons de leur impact sur l'estimation des ressources disponibles notamment la bande passante

Published
2014

19. Experimental performance analysis of routing metrics in Wireless Mesh Networks

Author

Leila Azouz Saidane, Chiraz Houaidia, Thierry Val, Adrien van den Bossche, Hanen Idoudi, Centre National de la Recherche Scientifique - CNRS (FRANCE), Ecole Nationale des Sciences de l'Informatique - ENSI (TUNISIA), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Institut de Recherche en Informatique de Toulouse - IRIT (Toulouse, France), Institut National Polytechnique de Toulouse - INPT (FRANCE), École Nationale des Sciences de l'Informatique [Manouba] (ENSI), Université de la Manouba [Tunisie] (UMA), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, and Université Toulouse - Jean Jaurès (UT2J)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Equal-cost multi-path routing, Performance, Routing table, Enhanced Interior Gateway Routing Protocol, Système d'exploitation, Réseaux et télécommunications, Wireless Routing Protocol, 02 engineering and technology, Metrics, Routing Information Protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], 0203 mechanical engineering, Architectures Matérielles, Packet loss, 0202 electrical engineering, electronic engineering, information engineering, Metric, Wireless mesh network, Routing, Zone Routing Protocol, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Testbed, 020206 networking & telecommunications, 020302 automobile design & engineering, Order One Network Protocol, Ad hoc wireless distribution service, Systèmes embarqués, OLSR, Optimized Link State Routing Protocol, Link-state routing protocol, Multipath routing, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, Hazy Sighted Link State Routing Protocol, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Computer network
Abstract

International audience; This paper provides a description of a wireless mesh network testbed setup and a measurement-based performance evaluation of the Optimized Link State Routing (OLSR) protocol [7] under three different routing metrics. The considered metrics include hop-count, ETX and ETT. The network performances are evaluated in an indoor testbed formed by heterogeneous MIMO devices. A part of our tests was about the impact of 802.11n features on the network performances showing the importance of lower layers consideration. Our measurements point out the shortcoming of each metric and eventual optimizations towards a more efficient routing. Experimental results show that OLSRETT outperforms OLSR-ETX and OLSR-hopcount significantly in terms of packet loss, end-to-end delay, and efficiency.

Published
2013
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20. Impact of IEEE 802.11 PHY/MAC Strategies on Routing Performance in Wireless Mesh Networks

Author

Hanen Idoudi, Thierry Val, A. van den Bossche, Leila Azouz Saidane, Chiraz Houaidia, Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de la Manouba [Tunisie] (UMA), Université Toulouse - Jean Jaurès (UT2J), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
Routing protocol, [INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Wireless ad hoc network, Equal-cost multi-path routing, Distributed computing, Système d'exploitation, Wireless Routing Protocol, Réseaux et télécommunications, 02 engineering and technology, PHY/MAC protocols, Routing Information Protocol, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], IEEE 802.11, Routing protocols, PHY, Ad hoc On-Demand Distance Vector Routing, Architectures Matérielles, Wireless lan, 0202 electrical engineering, electronic engineering, information engineering, Network performance, Wireless mesh network, IEEE 802.11s, Zone Routing Protocol, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, 020206 networking & telecommunications, Ad hoc wireless distribution service, Systèmes embarqués, Distance-vector routing protocol, Optimized Link State Routing Protocol, Link-state routing protocol, Interior gateway protocol, 020201 artificial intelligence & image processing, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Computer network
Abstract

International audience; Current routing mechanisms proposed for adhoc networks still feasibly applied in Wireless Mesh Networks given their similarities. Many researchers have conducted numerous simulations for comparing the performances of these routing protocols under various conditions and constraints. Most made comparisons are not aware of PHY/MAC layers and their impact on routing performances. In this paper we study through simulations the impact of PHY/MAC protocols on higher layers. The considered protocols include three propagation models, ie., FreeSpace, TwoRayGround and Shadowing, three different PHY/MAC protocols specified IEEE 802.11 standards namely, 802.11b, 802.11s and 802.11n, and finally three routing protocols, ie., AODV, OLSR and HWMP. In a comparative way, we investigate the effectiveness of these protocols when they coexist on a wireless mesh network environment. Our results show that the routing strategy can significantly impact the network performance only if it is strongly linked to the characteristics of the lower layers.

Published
2013

21. Improving connectivity and coverage of wireless sensor networks using mobile robots

Author

Leila Azouz Saidane, Hanen Idoudi, and Chiraz Houaidia

Subjects
Key distribution in wireless sensor networks, Robot kinematics, Coverage ratio, business.industry, Computer science, Redundancy (engineering), Robot, Mobile robot, business, Network topology, Wireless sensor network, Computer network
Abstract

Wireless sensor networks are often deployed in hardly accessible or hazardous fields. Their main goal is to monitor the target field and transmit surveillance data to a sink. Therefore, connectivity of the sensor network and the coverage ratio of the monitored area are the most relevant concerns to reach these goals. In this paper, we propose to use several mobile robots to assist sensor networks redeployment in order to enhance the network connectivity and the coverage ratio of the monitored area. We model the sensor network as an islets-based topology and we propose to use robots to detect and heal connectivity and coverage holes availing the sensors redundancy. Preliminary simulations showed that our new scheme can significantly enhance the connectivity ratio of the initial network and improve the coverage ratio by using few numbers of robots.

Published
2011
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22. Novel Link Availability Aware Metrics for Routing in Wireless Mesh Networks

Author

Leila Azouz Saidane, Thierry Val, Adrien van den Bossche, Hanen Idoudi, Chiraz Houaidia, Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de la Manouba [Tunisie] (UMA), Université Toulouse - Jean Jaurès (UT2J), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), and Institut National Polytechnique de Toulouse - INPT (FRANCE)

Subjects
Routing protocol, [INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Equal-cost multi-path routing, Distributed computing, Système d'exploitation, Réseaux et télécommunications, RoutingMetrics, 02 engineering and technology, Metrics, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, 0202 electrical engineering, electronic engineering, information engineering, Wireless Mesh Network, 020203 distributed computing, QoS Routing, Wireless mesh network, business.industry, Testbed, 020206 networking & telecommunications, Systèmes embarqués, Optimized Link State Routing Protocol, Metric (mathematics), Hazy Sighted Link State Routing Protocol, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Interference, Computer network, Routing Metrics
Abstract

International audience; This paper presents two novel metrics, Link Occupancy aware routing Metric (LOM) and Residual Link Capacity based routing metric with Interference Consideration (RLCIC), for accurately finding high-throughput paths in multihop wireless mesh networks. The first metric is load-sensitive and aims to balance the traffic load according to the availability of a link to support additional flows. The second metric reproduces better the capacity of a link since it is based on its residual bandwidth. It captures accurately the available path bandwidth information when considering both the intra-flow and the interflow interferences. Using several real experiments carried out into an heterogeneous IEEE 802.11n based network running with OLSR routing protocol, we have shown that our first proposal can accurately determine better paths in terms of throughput and delay, thereby significantly outperforming the other existing metrics. The consistency of the second metric RLCIC is proved formally based on notions of graph theory.

23. Link Availability Aware Routing Metric For Wireless Mesh Networks

Author

Chiraz Houaidia, Adrien van den Bossche, Leila Azouz Saidane, Thierry Val, Hanen Idoudi, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - INPT (FRANCE), Université de la Manouba - UMA (TUNISIA), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Université Toulouse - Jean Jaurès - UT2J (FRANCE), Université Toulouse 1 Capitole - UT1 (FRANCE), Réseaux, Mobiles, Embarqués, Sans fil, Satellites (IRIT-RMESS), Institut de recherche en informatique de Toulouse (IRIT), Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées, Université de la Manouba [Tunisie] (UMA), Université Toulouse - Jean Jaurès (UT2J), and Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)

Subjects
[INFO.INFO-AR]Computer Science [cs]/Hardware Architecture [cs.AR], Dynamic Source Routing, Computer science, Distributed computing, Système d'exploitation, Wireless Routing Protocol, Réseaux et télécommunications, 02 engineering and technology, [INFO.INFO-NI]Computer Science [cs]/Networking and Internet Architecture [cs.NI], Architectures Matérielles, 0202 electrical engineering, electronic engineering, information engineering, Wireless Mesh Network, Static routing, Zone Routing Protocol, IEEE 802.11n, business.industry, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Testbed, 020206 networking & telecommunications, Systèmes embarqués, OLSR, Link-state routing protocol, Multipath routing, Expected transmission count, 020201 artificial intelligence & image processing, Hazy Sighted Link State Routing Protocol, [INFO.INFO-ES]Computer Science [cs]/Embedded Systems, [INFO.INFO-OS]Computer Science [cs]/Operating Systems [cs.OS], business, Computer network, Routing Metrics
Abstract

International audience; This paper investigates the design of effective routing metrics in the purpose of network resources optimization and the satisfaction of users QoS requirements. Using several real experiments, we point out the shortcoming of the Expected Transmission Count (ETX) metric for eventual optimizations towards a more efficient routing. Experiments were carried out into an heterogeneous IEEE 802.11n based network running with OLSR routing protocol and have shown that ETX presents several shortcoming resulting in inaccurate estimation of the link quality and then of the routing decision. This paper presents improvements of the ETX metric based on link availibility for accurately finding high-throughput paths in multihop wireless mesh networks.

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