Network giant Cisco made a new enterprise Wi-Fi access point (AP) the lead act at its London event Cisco Live. Billed as the first AP with four antennas, it is faster than the competition, and can also be upgraded for dual duty on other network technologies.
The device was presented as the answer to the “bring your own device” movement, where users take multiple Wi-Fi devices into the office and expect to connect them. Embarrassingly for Cisco, the new access point arrived too late to help at Cisco Live itself, where demonstrators, press and delegates suffered from intermittent Wi-Fi availability.
The Aironet 3600 AP has four antennas, giving more reliability, to the three spatial streams (data channels) that it can set up between itself and a client device. It also has a slot for modules to be added – the first will be a network scanning probe using the same antennas, but future modiules could make it work as a dual-purpose device, also working with LTE or other technologies in licensed spectrum, execs hinted.
The access point also may (or may not) be in the running for O2’s Wi-Fi coverage in London, timed to coincide with the London Olympics, which look to be a major theme in the Cisco Live event.
“This access point is 30 percent faster than rival devices,” said Inbar Lasser-Raab director of enterprise mobility at Cisco. Although other devices from vendors such as Aruba can manage three spatial streams of data between access point and client – an ability allowed by the 802.11n MIMO (multiple input, multiple output) standard – the addition of a fourth antenna will allow additional range, and more reliability at longer range, helping the batteries of mobile devices to last longer.
“It’s like having four ears to listen with and four mouths to talke with,” said Lasser-Raab. The access point is based on Cisco’s own silicon, instead of indiustry-standard chips, he said: “We work on our own RF chips – we are not picking up off the shelf chips.”
As well as the extra antenna, the 3600 has an intriguing expansion slot. “Customers are looking to protect future investments,” said Lasser-Raab. “They can install modules in the field.”
What modules these will be was a little mysterious. The AP was handed round with an RF monitor module, which will be available by the end of the year. This uses the existing antennas to turn the AP into a dual-purpose AP and radio network probe, looking for performance issues and security breaches.
More possible modules could be for other radio technologies such as 3G and LTE on licensed spectrum, providing incoor hotspots or “femtocells”. Lasser-Raab admitted this might be a possibility but refused to comment, except to suggest that further announcements might be made at Mobile World Congress in Barcelona later this month.
The new AP got a glowing report from ThomasVogel, local area network manager at the Technical University of Darmstadt, who has updated a university-wide network from earlier Cisco APs, to support 25,000 students who all have multiple devices.
At Cisco Live, about 6,000 people with multiple device were able to bring the show’s Wi-Fi network to its knees. Cisco staff assured TechWeekEurope that it was working, but we shifted to 3G hotspot software on our phone.
The Aironet 3600 AP is available now for $1,495 (£947), or $1,595 (£1,011) for a version where the antennas are external and can be angled independently.
Cisco confirmed that the 3600 was available in demonstrations at Cisco Live, but was not on the main show network. We hope Cisco invests in a few for next year.
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UPDATE 1.
The network at Cisco Live is still proving problematic for most journalists, even later in the day, as the numbers thin out.
The most intriguing explanation so far is a suggestion that the network works for those with 802.11abgn access points, but not for those with only 802.11bgn.
Wi-Fi fans will know that 802.11a is a mostly-obsolete standard in the 5GHz band, which most people expected had been superseded by 802.11n.
... and of course an 802.11bgn adapter only works in the 2.4GHz band, and doesn't do 5GHz.
It looks like the Cisco wireless LAN ran out of steam in the 2.4GHz band (which is probalby understandable) and I - along with a bunch of other people - should have checked the specs of my netbook more carefully.
I'd still suggest the network needs to specified higher, or Cisco should provide Ethernet cables int he press room.
Peter Judge
Update 2
During the press conference, I naturally skyped and emailed friends at rival Wi-Fi firms.
Roger Hockaday of Aruba, confirmed that the Cisco AP would be designed for carpeted offices and auditoriums, but suggested "BYOD is running its course resulting in 2 or 3 devices per user. However in that case the majority of people will use one of the 3 main streams coming from the AP."
David Callisch of Ruckus (long-time beam forming Wi-Fi vendor) came back with the following. I don't think he is basing this on tests of this AP, and he shoe-horns in a mention of a Ruckus product (well done David!)
Yes. Within 5 meters it probably is. But if you try and do anything at
range (which we have) performance drops off significantly 50 to 85% in our
testing. We've tested all the 3X3:3 products on the market against our
2x2:2 and at range they perform worse. That's because there's a lot more
going on with multiple streams, each of which have the ability to be
interfered with because they cannot control the signal path or
polarization to ensure spatial multiplexing. Also, they are unable to
performance (at the same time) spatial multiplexing and transmit
beamforming. Our 3x3:3 that comes out in April will blow the top of all
these 3x3:3 products because it uses the adaptive array that allows us to
select the best signal path, perform both spatial muxing and beamforming
simultaneous and avoid interference by steering Wi-Fi transmissions around
interference and obstacles. And because this is a directional array,
users will see better data rates and longer ranges.
Also we've just added a new capability called ChannelFly. This is a
predictive channel management technique that selects the best channel
based a actual system throughput. It's a statistical modeling technique
that relies on observed capacity on all channels in both the 2.4GHz and
5GHz frequencies to automatically move clients to a better channel with
less interference. Every other channel optimization approaches uses
background checking where an AP jumps to other channels when it's not
serving clients to see if there's a better channel to use looking at
packet retries, transmission errors - not actually data traffic. These
approaches provide incomplete information for channel selection as they
are not able to measure realizable channel capacity. We are seeing 30
to70% increase in Wi-Fi throughput simply using this technique.
Looks like Cisco clean air is a lot of hot air.
Reminds me of the self defending network they once boasted about. Alas that was hot air too....