SpectrumConsult

Commodity Wireless Technologies and Radio Regulations

Wi-Fi blog

Fantasies and facts

We all have our fantasies, and about many things. Some we can talk about, some we’d prefer to keep to ourselves. Even if we limit ourselves to technology related fantasies, the ones we talk about can be pretty fantastic – think of the idea to pack a telephone, agenda,...

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Do the eyes have it?

In the late 1990’s wireless technology enthusiasts, appreciating the opportunities and capabilities inherent in the IEEE 802.11 wireless LAN standard, began thinking seriously about vehicular applications and promoted the idea of using this to improve road safety. In...

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The emperor’s RED clothes

You probably know the Andersen fable of the vain emperor who was deluded enough to parade before his people dressed in new clothes that were sold to him as invisible only to those unfit for their job or hopelessly stupid. Of course, the emperor nor his court wanted to...

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Looking Forward

Whereas 2018 provided few surprises in the era of commodity wireless, 2019 may prove more interesting. Here are three spaces to watch. The main hype is still 5G. Its communications qualities and capabilities at 3.4GHz and 26GHz (mmWave) are touted everywhere and...

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Taking Stock

2018 provided few surprises in the era of commodity wireless. In October, the FCC issued its Notice of Proposed Rule making for RLANs in the range 5925 to 7125MHz – U-NII-5 through U-NII-8. This is a lot of spectrum intended for the new generation Wi-Fi equipment with...

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Wi-Fi mesh

A key factor in mesh operations is the ability of the mesh as a whole to handle the traffic offered by the gateway and by its nodes (to and from attached clients). The traffic density varies: it is highest on links to the gateway and lowest on the links at the edges...

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Back again…

First of all, thanks to those who let me know they enjoyed the blog! I have been very busy with a lot of things and keeping the blog up to date fell between the cracks. But now, with the end of the year in sight, I will take the time to update the website and keep the...

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Musings on the road

Occasionally, a long weekend is an opportunity to get away from it all for a while, to get in the car and drive away. Doing just that brought up some thoughts about rules and regulations and on we deal with them, how they affect our ways of doing business. Having...

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Taking a break

The previous blog dates back to February and it will take some time before I will be able to take up the Wi-Fi performance trail again. In the meantime, I will put up smaller items like the evaluation of making more spectrum - 200 MHz - available for Wi-Fi in the 5GHz...

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Sic Transit…..

Do you remember what this Latin phrase means? The full phrase is about the demise of the glory of the “world” and it stems from the 14th century when people were concerned as much, if not more, with the heavenly hereafter as with the profane here-and-now. These days...

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Stick shift or automatic?

The car I drive is an automatic and it is great to drive – fast and reasonably efficient. It also has some switch-controlled options that look great in the brochures but that I never use – like manual gear selection. Living in a temperate climate, I have no reason to...

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5G?!

Hardly recovered from the "4G revolution" we are confronted with 5G plans, reports, claims and, yes, pilots. Last year the EU dedicated 50M euros to 5G research and big players like Intel, Qualcomm and Samsung have major research projects under way. Samsung reported...

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Competition or Compliance?

The beginning of a new year is always a tempting occasion to look forward to the coming year. Given that so many other blogs do a great job of holding forth on technology matters, I decided instead to address just one subject in a some detail: the difference in...

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Taking a Step Back

In the previous posts many things came up that negatively affect Wi-Fi performance and that could be seen as Wi-Fi bashing. That, of course, is not the case. Instead the goal is to create awareness of the fact that the expected performance may not be realized as...

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Performance and traffic load

In the previous blogs we went through a series of factors the influence Wi-Fi network performance: degradation through RF shadowing and interference, hidden node effects, excessive data rates, wrong CCA threshold, wrong CW and AIFS settings, the "beacon burden" etc. A...

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Where to begin

In the previous entry - Wi-Fi and its discontents - I noted the need for understanding the various causes of the Wi-Fi performance problems we encounter. These causes differ widely and range from inadequate planning to installation issues and wrong equipment to...

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Robustness and protocol efficiency

The previous blogitem addressed the effects on network performance of hidden node conditions and the level of the CCA threshold. Both are inherent to listen-before-talk etiquette and both have more impact with increasing equipment diversity and RF environment...

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Wi-Fi Robustness

The definition of robustness given on Wikipedia is "the ability of a system to resist change without adapting its initial stable configuration". That is what we need in the daily use of Wi-Fi networks. The daily practice of Wi-Fi is becoming dominated by growing...

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Wi-Fi and its discontents

We all have Wi-Fi, we all love Wi-Fi and many of us sometimes loath Wi-Fi - and we all have good reasons any of the preceding. In fact, with the BYOD trend blossoming into the new de facto regime for offices, schools and hospitals, the loathing is likely to increase...

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Fair Sharing

Sharing is good, fair sharing is sometimes essential.The !Kung people live in nomadic groups in a semi-arid, desert-like climate and food is scarce. Everybody shares with everyone else because without that they would perish. In the hi-tech world of broadband wireless...

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The 2.4GHz band and LTE

Not every user of wireless gear may know what the “2.4GHz ISM band” is but for all of us it is a very important resource: there is a huge variety of wireless gear – from hearing aids and Bluetooth to Wi-Fi and ZigBee and known as Short Range Devices – that operates in...

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The tragedy of the commons and the failure of the market

The Dutch Radioagency (Agentschap Telecom) recently published a report on large scale measurements on live Wi-Fi systems: along streets, in apartment blocks and in office buildings. The report reflects what many experts have observed and predicted – too many...

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Unlicensed LTE

End of January this year I wrote about Private LTE. Since that date, Qualcomm and Ericsson have talked about LTE in unlicensed spectrum - in the 5GHz band. Why that is off interest will be clear: off-loading high volume data traffic from cellular LTE onto 5GHz LTE...

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Private LTE

Private GSM has been around for a while - small scale cellular technology locally running in its own frequency band. Generally only a few MHz are available and that may be enough for a medium size office or business. Hand-off to operator networks is assured with any...

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