kabbikabbi Member Posts: 20 ■□□□□□□□□□
Is there anybody who knows a little bit about UMTS, and can explain me some things about the possibilities of UMTS? What is it exactely. What's the difference with 802.11a/b....


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    SartanSartan Inactive Imported Users Posts: 152
    802.11a = operates on 5GHz, provides 54Mbps througput (not including overhead)

    802.11b = operates on 2.4GHz, provides 11Mbps throughput (not including overhead)
    802.11b is also known as Wi-Fi (Wireless Fidelity).

    802.11g = operates on 2.4 or 5 gHz ranges, and is compatible with a or b, which means it can operate at 54Mbps, and can clock down to 11 Mbps.
    A new emerging technology called "SuperG" is known as 802.11G, and operates using synchronous frequency multiplexing and guard channels, providing 108 Mpbs (2 channels essentially). A disadvatage with this is it will practically kill other wireless networks around it.

    HiperLAN/2 is a european standard, capable of 54Mps in the 5GHz range.

    These speeds are without WEP (Wireless Equivilant Privacy) which provides security at a cost of extreme overhead.

    UTMS is a cell phone standard, and operates using code division multiplexing. It uses "idle time" in existing channels, in order to multiplex more data over the same "media" or wavelength. It operates over a wireless circuit switched network. UTMS has a dedicated minimum bandwidth of 2Mbit, provided by 802.1p (QoS and RSVP) prioritization. UTMS is compatible, or is essentially the same as a GSM network. UTMS operates roughly in 2 GHz range.

    Some rather evil possibilities of UTMS include:
    Free phone use! -- Ad sponsored. UTMS access points will be able to integrate with an existing public network. If you walk into a department store, the phone could message/phone you and direct you to a pair of jeans.
    UTMS ipv6 enabled cell phones will utilize cellular digital packet data (CDPD) to provide burst transmissions, such as accessing email, without tying up an entire channel continiously.
    UTMS will be dial on demand, so you only pay for bandwidth used.

    I think ? :P
    (You pick up alot in a boring 7-day 8-hour telephony course..)
    Network Tech student, actively learning Windows 2000, Linux, Cisco, Cabling & Internet Security.
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    kabbikabbi Member Posts: 20 ■□□□□□□□□□
    Wow!!... thank you for the comprehensive information.

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