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Clock Frequency Accuracy within Femtocells for timing and location

Clock Frequency Accuracy One of the potentially most difficult aspects of a femtocell design is providing the accurate timing clock for all the digital circuitry. It’s got to be good enough to meet the tight tolerances, but inexpensive to fit the budget. We discuss the requirements and innovative ways in which various vendors address this issue.

Femtocells to outnumber Cell Towers by mid 2010

Femtocells outweigh cell towers There are something like 3.7 Million cell towers (or basestations) worldwide. How long will it take before domestic femtocells reach that number. I’ve estimated that this could happen during 2010, only 18 months from now, by which time the RF landscape of network operators could be radically different. Read more about my assumptions and implications.

Review of US Femtocell market

USA Femtocell Market Review January 2009 has seen a flurry of announcements about femtocell product launches in the US. Sprint has been offering its Airave femtocell since September 2008 and now Verizon Wireless has launched its Wireless Network Extender using the same underlying product. ATT Wireless, not to be outdone, has had a flurry of press activity around its so-called 3G microcell, which is still some months away from availability. We've looked at the overall picture, compared the various offerings and drawn some conclusions.

Gold plated femtocell coverage for VIPs

Red Carpet VIP It's a problem as old as the first cellphone network. VIPs insist on excellent coverage and operation in their patch, and operations teams fall into line to meet their requests. How many network CTO's have called their network operations team and complained about a dropped call or poor coverage - expecting it to be resolved quickly? The situation at some network operators has meant that radio planning teams pay special attention to coverage of their C-level managers homes and routes to work. It's said that even the detailed travel plans of VIPs are fed through to radio planning teams to ensure good coverage at premium events.

Categories of comments about femtocells

Comment on Femtocells I’ve been reviewing comment feedback on various blogs and news sites regarding Sprint and Verizon’s femtocell offerings. I’ve noticed several clearly differentiated clusters amongst this feedback, and believe these needs to be used and acted on by operator’s marketing teams.

 

 

Two Tier Frequency Planning for 3G WCDMA Femtocells

Two Tier Frequency Spectrum Most 3G UMTS operators have been allocated 10Mhz of paired frequency spectrum (i.e. 10MHz uplink+10MHz downlink), typically in the 2100Mhz range allocated worldwide. This is used with two separate paired WCDMA carriers of 5Mhz each. Wideband CDMA differs from the original mobile CDMA system by using fewer, wider frequency range transmissions – CDMA typically uses carriers with a spread of 1.5Mhz.

Apart from the name, this provides benefits in poor or difficult transmission areas (e.g. built up, urban areas). WCDMA also differs by not requiring the basestation transmissions to be phase synchronised with each other (I think this was to get around a Qualcomm patent), making it more complex but in the long term easier to manage.

Turning off Femtocells

Image It may strike you as odd to think about how to turn femtocells off or dispose of them when the industry is doing its best to roll them out and turn them on. But every product has a lifecycle, and that includes working out what to do when the customer doesn’t pay up, or when the product reaches the end of its natural lifecycle. This wasn’t done when mobile phones first started being upgraded, leaving many unused in drawers or thrown into landfill refuse rather than being recycled.

Location Lock for Femtocells

Wheel Clamp Femtocell Location Lock A feature required by potential femtocell operators, location lock prevents a femtocell from being moved to a new location without the owning network operator’s awareness and permission. We explain the justification for this feature and technical implementation options.
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    Residential

    Residential

    A significant number of users continue to report poor mobile coverage in their homes. There will always be areas which are uneconomic for mobile operator to reach. They range from rural areas

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    Enterprise

    Enterprise

    The term Enterprise addresses any non-residential in-building including hotels, convention centres, transport hubs, offices, hospitals and retail outlets. It's not just intended for businesses to

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    Urban

    Urban

    Urban small cells (sometimes also named metrocells) are compact and discrete mobile phone basestations, unobstrusively located in urban areas. They can be mounted on lampposts, positioned on the

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    Rural

    Rural

    A rural small cell is a low power mobile phone base station designed to bring mobile phone service to small pockets of population in remote rural areas. These could be hamlets, small villages or

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