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      • Department of Computer Engineering
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      Effects of physical channel separation on application flows in a multi-radio multi-hop wireless mesh network: an experimental study on BilMesh testbed

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      Author(s)
      Ulucinar, A. R.
      Korpeoglu, I.
      Karasan, E.
      Date
      2014
      Source Title
      Journal of Network and Computer Applications
      Print ISSN
      1084-8045
      Publisher
      Academic Press
      Volume
      39
      Pages
      253 - 265
      Language
      English
      Type
      Article
      Item Usage Stats
      141
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      Abstract
      In this paper, we introduce BilMesh, an indoor 802.11 b/g mesh networking testbed we established, and we report about our performance experiments conducted on multi-hop topologies with single-radio and multi-radio relay nodes. We investigate and report the effects of using multi-radio, multi-channel relay nodes in the mesh networking infrastructure in terms of network and application layer performance metrics. We also study the effects of physical channel separation on achievable end-to-end goodput perceived by the applications in the multi-radio case by varying the channel separation between the radio interfaces of a multi-radio relay node. We have observed that the difference between TCP and UDP goodput performances together with the delay and jitter performance depends on the hop count. We also observed that assigning overlapping channels with a central frequency separation of 5-15 MHz may render the CSMA mechanism used in 802.11 MAC ineffective and hence reduce the overall network performance. Finally, we provide some suggestions that can be considered while designing related protocols and algorithms to deal with the observed facts.
      Keywords
      802.11
      CSMA
      Multi-radio nodes
      TCP
      UDP
      Multi-hop topologies
      Multi-hop wireless mesh networks
      Multi-radio
      Networking infrastructure
      Performance experiment
      Carrier sense multiple access
      MESH networking
      Network layers
      Testbeds
      Transmission control protocol
      Permalink
      http://hdl.handle.net/11693/26311
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.jnca.2013.07.008
      Collections
      • Department of Computer Engineering 1435
      • Department of Electrical and Electronics Engineering 3702
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