A report from Burton Group suggests that new emerging standard of wireless network (WLAN / WiFi) 802.11n (Mimo) will start replacing wired Ethernet 802.3 networks within the next 2-3 years as it improves throughput and range compared to actual 802.11 b/g.

IT senior analyst Paul DeBasi goes even further and says "IT professionals should start thinking now about how they will deploy, maintain and benefit from an all-wireless LAN."

This is a joke isn't it ? Even if I'm a fervent of wireless technology, I simply cannot imagine how wireless networks will replace actual wired networks. Here are the main reasons:

• Bandwidth: With 802.11n the maximum theoretical throughput (using 2 steams) will be 248 Mbps meanwhile Ethernet 802.3an (2006) already provides 10Gbps and next IEEE study group target is 802.3ba with both 40 and 100Gbps. I don't even speak about signal attenuation releated to distance and obstacles.

• Frequency spectum 2.4 GHz & 5GHz are very narrow and number of available channels are limited. So maintaining high speed links, large number of clients without facing frequency overlaps and other electro-magnetic interferences seems very unlikely.
• Electro-smog: With 802.11n the range covered will be larger but this will have undoubtedly have a negative impact on performance and signal strength specially when using ISM 2.4 GHz spectrum in a wireless crowed environment.
• VoWLAN capacity: Several studies have been done to determine, how many simultaneous calls one AP can handle. The number of simultaneous calls is 15 before observed speech quality is lowered via increased delay. (I assume the study also get rid of telephone wires).
• A "wireless only" corporate office means that PBX system also have to rely on wireless network, otherwise it would be complete non-sense to pull wire only for telephone and use wireless connectivity for computers.

Is this report a hoax or do they, at the Burton Group, have some enlighten prophets?

Source: ZDNet
Full report is available here (sign-in required)

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In Geneva, Switzerland, there are several projects more or less on tracks with a unique goal…providing Wireless Internet Access city-wide:

• Pour une capitale des télécommunications à la pointe du sans-fil . Under discussion at the City Council. Answer expected during Summer 07.

• Swisswifi is awaiting a political green light to go ahead with a commercial version providing access to up to 90% of the canton's population by installing 3500 antennas on public transports & traffic lights infrastructures.
• L'Esprit de Genève an association created on July 1, 2004 has for objective to give a new image and redynamise the relationship between Geneva and its citizens, which has already mapped Geneva's Wifi Free Access points has launched a project named GEspot that develops a free communication infrastructure in order to offer to Geneva's citizens and visitors free wireless access to the Internet.

  Unlike FON (a semi-open internet community), access to GESpots' wireless access points is totally free. Owners of GESpot access points can turn them on/off as they wish (keeping access point ON 24/24h is a mandatory requirement with FON).On their side, GEspot sells ready to connect Wifi Terminals (Linksys WRT54GL at 105.- USD) and ensures the automatic referencing of all the terminals in free access. Visitors using the WiFi access will find this facility as soon as they are connected to www.gespot.ch

If none of these projects work, the historical telecom operator, Swisscom, still proposes Internet access through its WLAN Hotspots (check prices first !) and of course its GPRS/EDGE/UMTS/HSDPA network (check prices first). 

As I'm not anymore a resident, but a Geneva's visitor, I hope to see such projects to become reality soon.   

 

Sources : Largeur.com &  Dubuc's blog

 

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