Question about the WRT54G's max user & actual range

Discussion in 'Cisco/Linksys Wireless Routers' started by kulunggoy, Jul 23, 2008.

  1. kulunggoy

    kulunggoy Addicted to LI Member

    how many max user(actual) can connect in a single wrt54G router? and also the actual range of the router with obstructions?

    can someone show me a table for comparison in other wireless router...


    another thing... can someone illustrate the radiation pattern of WRT54G router...

    thank you very much...
  2. ifican

    ifican Network Guru Member

    A better question is how many users are you trying or wanting to connect simultaneously? And are those wired or wireless? As far as radiation pattern thats going to depend on the type of antenna you use and the placement of the router. This also holds true for your question about obstructions. To give you a couple examples, the world recond for 802.11 wireless is somewhere around 130miles, a few folks on this site have gotten links to work at somewhere between 6-10 miles (i dont remember exactly but its close). Others that have posted have had issues passing signal between floors of their home. Distance is all going to come down to what antenna you use and your exact situation. There are lots of ways to direct your signal or shield your device for noise, and ideal and inefficient placement of your device. In the end it will come down to does your current situation meet your needs, if not how much time and effort do you want to put into making it meet those needs.
  3. HennieM

    HennieM Network Guru Member

    To expand a bit on ifican: How long is a piece of string?
    Just about all home routers have similar range, as they all use similar radios and antennas.

    Any router with a dipole antenna (like most routers/APs come with) will radiate in a donut around that dipole. If you replace the dipole with another antenna, the radiation pattern is that of the antenna - it has nothing to do with router nor the radio in the router.

    Range: if you live in an Igloo, the signal won't go outside of the Igloo, as the water/ice will absorb just about all the signal. Same for most metal structures. With concrete/brick/plaster signal can get through to some extend. Trees with nice leaves eat signal (water again). Some metal surfaces reflect signal, so you may not get where you want to, but you may get elsewhere where you don't want to...;)

    Further, with a G router or AP, all wireless clients connected to that AP shares a real world bandwidth of about 25Mbps. If you have 10 users connected by wireless and all download files at the same time, each will get about 2.5Mbps (about 0.3MB/s). If only one client is actively downloading at the time, it will get the full 25Mbps.

    And the record is now something like 238 miles, set by the same Venezuelan guys that set the 175 mile record. Set with 2 WRTs and some nice BIG dishes with Yagis as feed horns.
  4. ifican

    ifican Network Guru Member

    That is awesome, i knew it was up there and fairly recent for the 175 i couldnt remember what exactly. But 238 is just plain crazy..
  5. kulunggoy

    kulunggoy Addicted to LI Member

    thanks guys...

    i have a question again... :biggrin: what if i stream an audio in 12 computer wirelessly connected network ... what will be the effects ( delays, buffering, quality)

  6. HennieM

    HennieM Network Guru Member

    Once again, we are back to our piece of string....;)

    The bitrate would be the first thing to consider. Now audio is not as hungry as video, but perhaps do
    Bandwidth to be consumed = bitrate x 1.5 x 12
    and if that comes out to at less than 22Mbps, you should not experience "funnies". (The "x 1.5" is my estimate to account for overheads on streaming).

    Secondly, the above assumption is that all clients, and thus the whole AP, runs at 54Mbps. Thus, all stations (1 thru 12) must have "full strength" signal, or at least have a connection speed to the AP of (Bandwidth to be consumed) x 2.

    If your setup is like your drawing, where the AP is off to one side, you could replace the router's antenna with a patch- or panel antenna that would direct your signal in a sort of half moon. This antenna can be chosen to be pretty strong so you ensure all clients get good signal.
  7. kulunggoy

    kulunggoy Addicted to LI Member

    thank you very much.. i learned a lot..

    a follow up question again.. hehehehe

    we conduct a test in audio streaming in our school.. we use three laptop with wifi (1 of them is the server).. we setup our wrt54G router automatic DHCP and we use "linksys" as SSID with no security our (3)laptop's is configured as "obtain ip add automatically"... in our venue there are some wireless router also setup and it is also no security.. when we're trying connecting the other 1 laptop it always connecting to the other wireless router.. we're trying to disconnect the other router but it always get connected...(ask some for more details if it is not clearly stated.. sorry for my bad english.. hehehe) .. whats wrong in our setup?
  8. HennieM

    HennieM Network Guru Member

    Don't know why the one laptop would always connect to the other AP.

    A point to note:
    When your audio server is on a wireless device, you immediately half your available bandwidth, as the single radio in the AP must repeat wireless signal.

    The single AP radio must now listen to the server, then stop listening and broadcast to the stations, then listen to the server again, then stop listening and broadcast to the stations,....

    If you implement your plan, make sure the audio server has a fast wired connection to the AP.
  9. kulunggoy

    kulunggoy Addicted to LI Member

    what do you mean of that? can you explain more?.... :wink:
  10. HennieM

    HennieM Network Guru Member

    Audio Server --wired(ethernet_cable)-- AP --wireless-- stations
  11. kulunggoy

    kulunggoy Addicted to LI Member

    now i see... i think i use a fast wired connection. you mentioned this "1.5 is my estimate to account for overheads on streaming" can you explain more on this too? :biggrin:
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