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Can´t get a 54MBit connection

Discussion in 'Tomato Firmware' started by Christian72D, Jul 28, 2008.

  1. Christian72D

    Christian72D LI Guru Member

    I just installed my "new" HP TC1100 Tablet PC with it´s buildt in Intel PO/Wireless 2100 3B card.
    I have Tomato 1.19 on my Linksys WRT54GL and the problem is, that i can only establish connections with 1MBit instead of 54MBit.

    I´m using the newest drivers for XP, i´m sitting 5m in front of the router with the laptop, so what could be the problem?

    These are my settings for WLAN:

    [​IMG]
     
  2. Toxic

    Toxic Administrator Staff Member

    since you are using WDS the rate of speed of the wireless network is halved for EACH WDS device you have connected.

    you CANNOT get 54Mbps on even a single wireless device. maximum throughput would be approx 20-23Mbps. Wireless is a 2-WAY connection.

    so theoretical download speed on a WDS network would equal something like this...

    WDS-WDS = 11Mbps download speed.
    WDS-WDS-WDS = 5.5MBPS download speed etc etc

    these are maximum rates without any interferance.

    Also the more Wireless devices (PCs) you add then they ALL share the current maximum speed.

    54Mbps has always been a myth. :(
     
  3. HennieM

    HennieM Network Guru Member

    The Intel Pro Wireless 2100 3B is an 802.11b card - max connection speed 11Mbps. (See http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-50022).

    Real world thruput probably around 6Mbps.

    If you connect via repeating WDS nodes (or via any AP that has to repeat the wireless signal), you'll get:

    Speed = 1/(1 + x) of full speed.

    Now full speed, as mentioned, is probably 6Mbps.
    If you go through 1 wireless repeating node, your speed will be:

    Speed = 1/(1 + 1)x6 = 3Mbps max

    If you through 2 wireless repeating nodes:

    Speed = 1/(1 + 2)x6 = 2Mbps max

    etc.....
     
  4. Toxic

    Toxic Administrator Staff Member

    Thanks HennieM forgot about the 11b card. Also even if you have 2Mbps this will be maximum shared speed. I dont know if your HP TC1100 is upgradeable but some apparently can have a wireless module upgrade to 802.11g standard.
     
  5. Christian72D

    Christian72D LI Guru Member

  6. TexasFlood

    TexasFlood Network Guru Member

    Looks like the TC1100 -can- support 802.11g and even 802.11a, but it depends on which card is in it. According to the HP Compaq Tablet PC TC1100 Overview/Specs page, the available cards are below. Looks like bad luck to have gotten the only one of the bunch that is 802.11b only, :-(

    HP W500
    802.11a/b/g Integrated support for 802.11a, b and g
    Up to 54mbps throughput performance
    Advanced Encryption Standard (AES) support


    Intel PRO/Wireless 2915ABG
    802.11 a/b/g wireless LAN Intel® Centrino™ mobile technology
    Integrated support for 802.11a/b/g
    Up to 54mbps throughput performance


    Intel PRO/Wireless 2200BG
    802.11b/g wireless LAN Intel® Centrino™ mobile technology
    Integrated support for 802.11b, g
    Up to 54mbps throughput performance


    Intel PRO/Wireless 2100
    802.11b wireless LAN Intel® Centrino™ mobile technology
    Integrated support for 802.11b
    Up to 11mbps throughput performance
     

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