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Publication
Experimentation with radio environment maps for resources optimisation in dense wireless scenarios
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Advisor(s)
Abstract(s)
The rapidly increasing popularity of WiFi has created
unprecedent levels of congestion in the unlicensed frequency
bands, especially in densely populated urban areas. This results
mainly because of the uncoordinated operation and the unmanaged
interference between WiFi access points. Recently, Radio
Environment Maps (REM) have been suggested as a support for
coordination strategies that optimize the overall WiFi network
performance. Despite some theoretical work done in this area,
there are no clear experimental evidences of the benefit brought
by WiFi coordination. In this context, the main objective of this
experiment is to assess the benefit of a coordinated management
of radio resources in dense WiFi networks using REMs for
indoor scenarios. This experiment has used the w-iLab.t test
environment provided by iMINDS, a cognitive-radio testbed for
remote experimentation. It was shown that REMs are capable
of detecting the presence of interfering links on the network
(co-channel or adjacent channel interference), and a suitable
coordination strategy can use this information to reconfigure
Access Points (AP) channel assignment and reestablish the client
connection. The coordination strategy almost double the capacity
of a WiFi link under strong co–channel interference, from
6.8 Mbps to 11.8 Mbps, increasing the aggregate throughput
of the network from 58.7 Mbps to 71.5 Mbps. However, this
gain comes with the cost of a relatively high density network
of spectrum sensors (12 sensors for an area of 60 × 20 m),
increasing the cost of deployment.
Description
Keywords
Radio environment map Radio test-bed Radio resource management Experimentation
Citation
DIONÍSIO, R.P. ; ALVES, T.F.; RIBEIRO, J.M.A.(2017) - Experimentation with radio environment maps for resources optimisation in dense wireless scenarios. In International Conference on Advances in Cognitive Radio, 7, Veneza, 23-27 Abril. [IARIA : s.n.]. p. 1-6