[ofcom] A survey of IEEE 802.11b/g 'WiFi' usage has been carried out at various urban locations in the UK. This has revealed a wide variety of problems encountered by users, many of which are due to causes other than spectrum issues. These include problems with the wired Internet and device configuration errors.
Where the users' problems are spectrum-related they tend to be due to interference between devices in the 2.4 GHz ISM band rather than congestion, as was initially believed. Such problems are common but geographically dispersed. In the centre of London, however, it has been shown that the demands on this band are much higher than other locations surveyed and users are experiencing the combined effects of interference and congestion.
The problems of interference between different types of radio device in the 2.4 GHz band lead us to conclude that a certification scheme is highly desirable. Some non-WiFi devices already sport 'WiFi-friendly' claims on their datasheets. We propose extending this concept to a '2.4 GHz friendly' logo, which would help drive acceptance of innovative technologies in this band.
Estimating the Utilisation of Key Licence-Exempt Spectrum Bands
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