Nicolas Letor

Contact information

Contact Address:   PATS Research Group - IBBT / University of Antwerp - Department of Mathematics and Computer Science Middelheimlaan 1 B-2020 Antwerpen Belgium

Phone: +32 (0)3 265.35.19. Fax: +32 (0)3 265.37.77. e-mail: nicolas.letor@ua.ac.be Office: G.2.36

2008

• A cluster driven channel assignment mechanism for wireless mesh networks
  N. Letor, S. Bouckaert, C. Blondia, I. Moerman & P. Demeester
  Proc. Second IEEE International Workshop on Enabling Technologies and Standards for Wireless Mesh Networking (MeshTech 2008) in conjunction with IEEE MASS 2008, 2008.
  Permalink | BibTeX | Abstract | PDF Available
  
  Bibtex:
  @ARTICLE{nletor08a,
  author = {N. Letor, S. Bouckaert, C. Blondia, I. Moerman and P. Demeester},
  title = {A cluster driven channel assignment mechanism for wireless mesh networks},
  abstract = {In this paper we present a cross layer topology preserving channel selection protocol for a two interface wireless mesh network. The presented protocol is a cluster driven channel selection protocol, preserving a single interface to maintain connectivity and using the other interface to participate in small clusters. The clusters are organized by an independent set clustering algorithm, in which the cluster head dictates the operating channel for the local cluster. We show that the channel selection algorithm doubles the capacity for both a regular grid and a random topology.},
  booktitle = {Proc. Second IEEE International Workshop on Enabling Technologies and Standards for Wireless Mesh Networking (MeshTech 2008) in conjunction with IEEE MASS 2008},
  year = {2008},
  month = {September}
  URL = {content/publications/2008/nletor08mwis.pdf}
  }
  
  Abstract:
  In this paper we present a cross layer topology preserving channel selection protocol for a two interface wireless mesh network. The presented protocol is a cluster driven channel selection protocol, preserving a single interface to maintain connectivity and using the other interface to participate in small clusters. The clusters are organized by an independent set clustering algorithm, in which the cluster head dictates the operating channel for the local cluster. We show that the channel selection algorithm doubles the capacity for both a regular grid and a random topology.

2007

• Distributed On Demand Channel Selection in Multi Channel, Multi Interface Wireless Mesh Networks
  S. Bouckaert, N. Letor, C. Blondia, I. Moerman & P. Demeester
  Proc. Globecom 2007, 2007.
  Permalink | BibTeX | Abstract | PDF Available
  
  Bibtex:
  @ARTICLE{bouck07a,
  author = {S. Bouckaert, N. Letor, C. Blondia, I. Moerman and P. Demeester},
  title = {Distributed On Demand Channel Selection in Multi Channel, Multi Interface Wireless Mesh Networks},
  abstract = {In this paper we present a protocol performing on demand distributed channel selection in multi channel, multi interface wireless mesh networks, based on the exchange of control messages. The link based channel reservation happens almost instantly when data traffic is sent through the network, and does not require long-term traffic profiles or measurements.
  The protocol is both simulated and implemented using the IEEE 802.11b/g protocol. We show that in a raster topology, the protocol successfully optimizes the local spectrum usage at 87% of the nodes, and that globally, an equal amount of links is allocated to each of the channels used for the transport of data packets.},
  booktitle = {Proc. Globecom 2007},
  year = {2007},
  month = {November},
  URL = {content/publications/2007/bouckaert07fresme.pdf}
  }
  
  Abstract:
  In this paper we present a protocol performing on demand distributed channel selection in multi channel, multi interface wireless mesh networks, based on the exchange of control messages. The link based channel reservation happens almost instantly when data traffic is sent through the network, and does not require long-term traffic profiles or measurements. The protocol is both simulated and implemented using the IEEE 802.11b/g protocol. We show that in a raster topology, the protocol successfully optimizes the local spectrum usage at 87% of the nodes, and that globally, an equal amount of links is allocated to each of the channels used for the transport of data packets.

• Enabling cross layer design: adding the MadWifi extensions to Nsclick
  N. Letor & P. De Cleyn & C. Blondia
  Proc. First International Workshop on Network Simulation Tools 2007 in conjunction with Valuetools 2007, 2007.
  Permalink | BibTeX | Abstract | PDF Available
  
  Bibtex:
  @ARTICLE{nsmadwifi,
  author = {N. Letor, P. De Cleyn & C. Blondia},
  title = {Enabling cross layer design: adding the MadWifi extensions to Nsclick},
  booktitle = {Proc. First International Workshop on Network Simulation Tools 2007 in conjunction with Valuetools 2007},
  abstract={Simulations have always been a very useful and powerful tool to study and develop networking protocols. ns-2 is one of the most commonly used open-source network simulators and many protocols have been evaluated with this tool. In order to bridge the gap between simulation and implementation on a real testbed, Nsclick was developed. Nsclick makes it possible to entirely reuse code between the ns-2 simulator and a testbed, based on the Click Modular Router. In the quest for high performance wireless networks, researchers have found that the layered architecture networks did not perform well enough. Therefore they focused their research on cross layer design techniques. Although using Click and the Mad-Wifi driver gives us many possibilities to design and evaluate cross layer optimizations in a testbed set up, the Nsclick platform does not support these extensions. In this paper we will introduce an extension to ns-2 which overcomes these shortcomings of the Nsclick platform. This extension makes the wireless features of the Click Modular Router available in Nsclick platform, eliminating the differences between the ns-2 simulator, within the Nsclick platform, and a real world set up.},
  year = {2007},
  month = {October},
  URL = {content/publications/2007/nletor07nsmadwifi.pdf}
  }
  
  Abstract:
  Simulations have always been a very useful and powerful tool to study and develop networking protocols. ns-2 is one of the most commonly used open-source network simulators and many protocols have been evaluated with this tool. In order to bridge the gap between simulation and implementation on a real testbed, Nsclick was developed. Nsclick makes it possible to entirely reuse code between the ns-2 simulator and a testbed, based on the Click Modular Router. In the quest for high performance wireless networks, researchers have found that the layered architecture networks did not perform well enough. Therefore they focused their research on cross layer design techniques. Although using Click and the Mad-Wifi driver gives us many possibilities to design and evaluate cross layer optimizations in a testbed set up, the Nsclick platform does not support these extensions. In this paper we will introduce an extension to ns-2 which overcomes these shortcomings of the Nsclick platform. This extension makes the wireless features of the Click Modular Router available in Nsclick platform, eliminating the differences between the ns-2 simulator, within the Nsclick platform, and a real world set up.