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Wi MAX??

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  • 07-08-2008 6:28pm
    #1
    lemonhead77
    Closed Accounts Posts: 42 ✭


    Hi folks,i have been hearing talk recently about a new broadband, that it is going to change everything about the way we get broadband.....does anyone here no anything about this, where and when will we be able to get it??


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    #2
    smellslikeshoes
    Registered Users Posts: 3,354 ✭✭✭smellslikeshoes


    Completely over hyped.


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    #3
    PogMoThoin
    Closed Accounts Posts: 13,874 ✭✭✭✭PogMoThoin


    No actual advantages to the consumer other than the fact that it can sometimes take reflections, therefore less need for a line of sight unlike wi-fi.

    Several advanteges to an ISP tho, more here


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    #4
    Marlow
    Registered Users Posts: 14,555 ✭✭✭✭Marlow


    It's just the next generation of wireless, but it's not ground breaking.

    It will improve the quality of server and allow faster speeds, than what fixed wireless operators can offer now, but it's still the same physics as fixed wireless.

    So in regards to WiMAX, it's just the next step from what most fixed wireless operators offer now.

    /Martin


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    #5
    watty
    Registered Users Posts: 32,417 ✭✭✭✭watty


    In fact it's just the same performance as some Fixed Wireless, just a bit cheaper gear. Or in some cases same per user performance but slightly more users.


    The Reflections issue (OFDM) only applies at lower frequencies than 3.5GHz (Where all current WiMax is used). It's of most value indoors for a mobile version, which ideally needs lower frequency.

    Fixed and Mobile WiMax are two incompatible systems. 3G at 2.1GHz and WiMax at 2.3GHz or 2.6GHz is marginal for indoors without lots of base stations. 700MHz to 1400MHz is much better. That's why 900MHz GSM is better than 1800MHZ GSM or 3G for indoor coverage.

    Some modes of WiFi also use the OFDM to improve signal rather than destruction from reflections (visible on Analogue TV as Ghosts).

    To give any real improvement of speed or capacity you need more bandwidth than operators have. Same problem with LTE. It offeres 100Mbps per sector, but that needs 20MHz and then for dense Network planning you need 3x to 6x 20MHz chunks per operator.


    Spectrum (physics) is really the limiting factor and has been for nearly 4 years. WiMax is not bringing any great revolution.


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