What is an Attocell? New Personal Femtocell Technology

Posted by Keith Day

Ubiquisys has announced a new smartphone accessory – the attocell. This remarkable device is a personal mobile phone signal, with a range so tiny it can be used anywhere that your laptop has an internet connection. It provides a great mobile service anywhere in the world, and calls are made and received as though on the home country network. But how does it work? Read on to find out more…

Attocell Personal Femtocell Infographic
Attocell infographic – click for a bigger version

Why is it called an attocell?

The term atto means 10-18, which is a bit smaller than femto, which is 10-15. The term was already being used to describe a personal femto, we just made the technology work. Just like the word femto, we expect atto to remain an industry term, not a consumer product name.

Isn’t the attocell just a very small femtocell?

No. Some femtocells do have very small form factor, whereas the attocell has a very small range which is intelligently derived. The fact is that hardware miniaturisation is no longer a limiting characteristic. What enables new uses for the technology is cell intelligence, which is software not hardware.

In what situations would someone be able to use an attocell?

The connected laptop needs an internet connection, so a hotel room or an office would be good places to use an attocell. This is also where mobile reception tends to be least effective. The attocell is not really designed for use on the move.

Does the phone need to run a special app?

No, 3G phones recognise the attocell as a standard cell. They automatically switch to the attocell when placed on top, and switch back when removed.

Doesn’t this device just bypass roaming charges?

In most cases where the attocell would be used, like in a hotel room, people are already using a Skype-type or similar service rather than roaming. The attocell adds the convenience of using your own phone as though you were in your home country. It doesn’t incur roaming changes because the phone is not roaming, and does not connect to the visiting country’s networks. Instead it travels over the internet to the home country.

What is the power output of the attocell?

Running at a range of 5mm the attocell typically produces a signal of -70dBm or 0.0000001 milliwatts. That’s tiny – about one billionth of the output of a typical Wi-Fi access point.

What do operators think of the attocell?

We can’t say about operators in general, but the device was developed in response to suggestions from multiple mobile operators. Our job was to innovate and develop useful new technology in response to these requirements.

What is to stop other vendors from developing an attocell?

At Ubiquisys we are always very careful to protect our IPR before embarking on new projects. The attocell has been no exception.

How much will an attocell cost?

Mobile operators will decide pricing depending on a variety of market drivers. From a wholesale cost perspective, the attocell is no more expensive to produce than the lowest cost residential femtocell.

Which operators will provide attocells and when can I get one?

The attocell is a working product today, but like all cellular products it will undergo a standard commercialisation process with each mobile operator. We are currently discussing attocell introduction with several mobile operators.

If you have any questions about the attocell or anything raised in this post, please leave us a comment below.

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  • IBWirelessNews

    Interesting concept, but there are some issues, that hopefully, you can clarify:
    - PLMN id used- will it be the home PLMN of the subscriber?
    - Frequency usage – which frequencies will be used? Isn’t this roughly legal?
    - Cell re-selection (other PLMN) – if it uses another PLMN, how do you expect the phone to “roam” to the “home” PLMN? “Turn off/Turn on” or “search for networks” options are not so user-friendly.
    P.Claro
    http://www.ibwirelessnews.com

  • TechJunkie

    to skip the complications with cell providers and costs, why not develop an internet based receiver that the personal owner could connect to the internet at their home which would receive the attocel signal abroad and just retransmit it to the local network using the same ID as the phone hand set. They would never even know your roaming and you only had to pay once for the hardware and maybe the maker could charge a small annual license fee to maintain the translation service. Sort of the AV Slingbox model working in both directions…

  • http://www.ipaccess.com Kit Kilgour

    This would be an interesting legal test case: femtocell specifications require the femtocell to verify its location and that it is allowed to transmit in that location before actually transmitting, and ITU regulations tend that way as well, so I would imagine a number of operators (particularly those would lose roaming revenue) being somewhat unhappy at the prospect of their licensed spectrum being used – however sparingly -without them having a say in it.

  • guest

    can you keep me up to date whit news about this ? jarre (A T ) gmx (point) LI

    thanks!

  • Prakash

    I can understand this could used to extend indoor coverage but would expect this to
    be causing issues for operators for roaming users (if roaming is allowed). There will be
    some technical challenges for roaming UE’s in addition to regulatory aspects.
    a) Using some other operators license band (however small the power may be)
    b) Interference from other network nodes in the same carrier
    c) similar to a Femto, will not expect this to be retailed off-the-shelf but to be sold
    by the operator. This can ensure charging aspects, handling of updates to VLR whilst
    accessing MSC in the home PLMN can be handled by the network.
    d) Routing of emergency calls

    Whilst could be useful for coverage in home PLMN, struggle to see why any operators
    would allow roaming with this device (like for femto).

  • Richard Deasington

    Hi,

    Surely the attocell will be an extension of the home PLMN – as soon as the phone ‘sees’ the home PLMN network id it will switch to it automatically – phone are always programmed to prefer their home PLMN – for example if you’re close to a border area (between say France & Germany) a French phone from say Orange will always prefer a signal from the Orange France network to roaming on a German network, even if the signal is weaker. The phone will just think it has suddenly flown-home when coupled to the attocell, and flown back out again when removed.

    As the coupling between the phone and the attocell is ‘near-field’ it is essentially inductive rather than radiated. At these power levels and with the correct design of a near-field loop in the attocell interference with the visited PLMN is academic.

    Best regards

    Richard Deasington – iDirect

  • Roamingabroad

    Just a little question to be sure. Let´s suppose I go to a foreign country and do the following steps:
    1.- Connect my laptop to my hotel´s WiFi
    2.- Connect laptop and AttoCell
    3.- Connect my mobile to the AttoCell
    Then, could I speak for free with my mobile?

  • http://twitter.com/RobR Rob Reagan

    For increased mobility, are there any plans for a handheld version using satellite as the WAN backhaul method?

  • Michael

    The attocell was announced in the German Computerwoche. What is your opinion how and when we in Germany can benefit from your product?

  • Alandal Alandal

    not sure this is “legal”. even with minimal RF transmitted (coupled into your phone), it may still not be in the legal frequency bands in a foreign country.

    since you have a computer with internet, why don’t you just forward your home cell phone to, say, Skype, or any other IP phones that are installed on your PC? (It may require you pay long distance if your IP phone number is NOT local w/ your cell.)

  • Ibrahim Nicolas

    Very interresting, though, I think that using 3G spectrum should be approuved by licence in the used country. Can Attocell uses this spectrum without any legal permission ? id the used spectrum shared with the already existing operators’ spectrum ?

  • Lukasz

    When can we expect release of such product?