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Technology Radio Technologies 3G Femtocells
| 3G Femtocells |
| Written by David Chambers |
| Tuesday, 11 November 2008 18:25 |
|
3G femtocells like this are
compatible with operators such as T-Mobile and AT&T in the US,
SoftBank in Japan and most mobile operators in the rest of the world.
It is this wide adoption of the GSM family of standards (over 87% of
all mobile phones are GSM capable) that makes this the most attractive
market for vendors. It also enhances the coverage and capacity of the latest mobile phones in more contained locations. The limiting factor tends to be more around the capacity of the wireline broadband internet connection (especially the uplink), which is one reason for determining the maximum voice capacity at 4 simultaneous calls. 3G Femtocells have also been incorporated into broadband DSL modems, with vendors such as Netgear and Thomson developing units which combine DSL, Firewall, WiFi, Ethernet Router and 3G Femtocell capabilities in a single box. These are targetted at operators with both fixed and mobile divisions, so they can offer a converged solution at the most cost effective price. 3G Femtocells offer:
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The most common type of femtocell is based on 3rd Generation UMTS
mobile phone system, which evolved from GSM. This 3G system has been
enhanced to include high speed broadband data (called HSPA) at rates up
to 21Mbit/s with a roadmap that promises rates of 84Mbit/s.A typical 3G femtocell is shown on the left - this is the Zonegate product from Ubiquisys.
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