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      In-kernel passive measurement of the performance impact of hidden terminals in 802.11 wireless networks

      Raynel, Scott McKenzie; McGregor, Anthony James
      DOI
       10.1145/2069063.2069078
      Link
       dl.acm.org
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      Citation
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      Raynel, S.M. & McGregor, A.J. O(2011). In-kernel passive measurement of the performance impact of hidden terminals in 802.11 wireless networks. In Proceedings of the 8th ACM Symposium on Performance evaluation of wireless ad hoc, sensor, and ubiquitous networks, November 3-4, 2011, Miami, Florida, USA (pp. 81-88). New York, USA: ACM.
      Permanent Research Commons link: https://hdl.handle.net/10289/6370
      Abstract
      The negative performance impact of the presence of hidden terminals in wireless networks has been well know for decades. Despite much research in the area, many deployed networks continue to suffer a performance penalty because of hidden terminals. Ad hoc wireless networks are particularly susceptible to hidden terminal collisions because there are fewer opportunities to plan the network in a way that avoids or reduces the number of hidden terminals. Measuring the presence of hidden terminals and the impact they are having on performance is difficult, especially in a network of many nodes. Without such measurements, the users and operators of wireless networks can not tell if performance problems are caused by hidden terminals or some other problem. We introduce new methodology that can detect the presence of hidden terminals and estimate the performance impact they are causing. The methodology requires no additional hardware and is suitable for wide scale deployment and long term operation. The approach is based on in-kernel instrumentation of the wireless network stack. The design, implementation, and testing of the approach are covered. Results from in-lab testing and the measurement of a live commercial 802.11 network are also presented, including a case study where performance was significantly improved.
      Date
      2011
      Type
      Conference Contribution
      Publisher
      ACM
      Collections
      • Computing and Mathematical Sciences Papers [1455]
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