Use a wireless router as a repeater for a laptop?

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Hi all, I am wondering if it would be possible to bridge a wireless
router with a wifi card in a laptop, so that the wireless router would
essentially serve as an extended antenna for the wifi card.

I know that you can bridge two routers to extend the range from the base
router, but that's not what I'm trying to do.  Instead, I want to bridge
the extra wireless router with the laptop, so that the extra router is
basically transparent, serving only as an extension of the laptop's wifi.

Is such a configuration possible?  I would be using something like
DD-WRT firmware on an appropriate extra router.

Thanks for your help with this.

Jon

Re: Use a wireless router as a repeater for a laptop?
On 11/29/2013 2:13 PM, Jon Danniken wrote:
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Isn't this just a wifi repeater?


Re: Use a wireless router as a repeater for a laptop?
On 11/29/2013 09:16 PM, miso wrote:
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Well I don't know, I am pretty much a newborn WRT wireless, and my track
record with networking is pretty dismal.

I know you can set up an extra router as a repeater by bridging it with
the main router, which involves setting up both of the routers to
function in such a manner.

I am basically just trying to use the extra router as a "wireless
antenna extender" for the laptop wireless card, without setting up
anything differently in the main (WAN connected) router.

My apologies if I have some of the terms mixed and mingled.

Jon


Re: Use a wireless router as a repeater for a laptop?
Jon Danniken (for it is he) wrote:

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If you can bear to connect your laptop to your DD-WRT router with a cable,  
then you could use it as a wireless client bridge. You'll get much better  
throughput than with wifi repeating.

http://www.dd-wrt.com/wiki/index.php/Client_Bridged

alexd


Re: Use a wireless router as a repeater for a laptop?
On 11/30/2013 2:26 PM, alexd wrote:
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I forgot to mention that bridging can get ugly. If you have two existing  
networks and just bridge them, they can have address conflicts since the  
addresses were assigned before the bridge was established.

Re: Use a wireless router as a repeater for a laptop?
On 11/30/2013 2:26 PM, alexd wrote:
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A repeater cuts the bandwidth in half, not that it really matters in a  
lot of situations. That is, if the internet pipe isn't very fast.

Sometimes your phone can't get wifi where the notebook can, since the  
notebooks often have better antennas Then a repeater can be handy if  
your phone can't do a faux ethernet via the usb port.


Re: Use a wireless router as a repeater for a laptop?
On 11/30/2013 02:26 PM, alexd wrote:
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Thanks Alex.  I'm not too concerned with the throughput, it's extending
the range that is the issue with this setup.  That's a neat setup there,
and I noticed another one that actually does something similar and lets
me connect to the middle router wirelessly.

Unfortunately they are all still bridging the two routers, where you
connect the laptop to the middle router, and configure the middle router
to bridge to the main router.  After looking around at all the examples
I could find, I'm starting to think my end goal of being able to use the
middle router as a wireless adaptor connected to the laptop might just
not be possible.

Jon


Re: Use a wireless router as a repeater for a laptop?
Jon Danniken (for it is he) wrote:

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I'm puzzled by that statement, because that's pretty much what a wireless  
client bridge *is*.

alexd

Re: Use a wireless router as a repeater for a laptop?
On 12/08/2013 02:49 AM, alexd wrote:
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A wireless adaptor on a laptop uses the laptop's software to connect to
an access point; I wanted to configure the middle router so that when it
was set up and connected to the laptop, I would be able to use the
laptop's software to connect to the far access point, using the middle
router as a sort of "wireless adaptor" if you will.

In other words, I wanted to be able to see the far AP's SSID on the
laptop's software, and connect to it using the laptop's normal "wireless
connection" application.

Jon


Re: Use a wireless router as a repeater for a laptop?
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adaptor  
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wireless  
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to
it
"wireless
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I've actually done this using two wireless adapters on the middle  
computer, one
running client software and the other acting as an access point.  Not  
sure if it
can be done with just one.

Ben

Re: Use a wireless router as a repeater for a laptop?
On Sun, 08 Dec 2013 15:57:36 -0800, Jon Danniken wrote:

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I just did exactly what you're asking, as described in another thread.

The "router" I used was a Ubiquiti Nanobridge horn (without the dish),  
which is about the size & shape of a small 2D-cell flashlight.

The laptop is a dual-boot Win7/Ubuntu Thinkpad W510.

There's really no setup needed on the laptop; I simply turned off the  
internal WiFi NIC (the Lenovo has a hard switch to do that) and plugged
the radio/router into the Ethernet port of the laptop.

The laptop works just fine, and now I can transmit and receive for miles
around that laptop.  Full details are in the current thread titled:  
 "Straightforward out-of-the-box solution for extending WiFi range"

This particular router transmits at 27dBm which was too powerful for
me, so I lowered it to 6dBm and STILl got a whopping -40dBm signal
strength to my router about 50 feet away.

I'm pretty sure that I could move that router a mile away, and still
connect to it (I haven't tested that yet), simply by clipping that
Nanobridge M2 into its dish (which comes with it when you buy it).

Since the dish is 18dBi, and the radio/router is 27dBm, the transmit
power available to that laptop is now 45dbM, which is over 30 Watts!

Compare that to the puny 0.5dBi antenna inside your laptop, with probably
something like a 12 to at most 15dBm transmitter, which is a puny  
0.01 to 0.02 Watts.


Re: Use a wireless router as a repeater for a laptop?
On 12/16/2013 06:34 PM, Danny D'Amico wrote:
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No, you connected to the far AP with the router's internal software,
accessed by your laptop.

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Yes, that's a pretty neat device.

Jon



Re: Use a wireless router as a repeater for a laptop?
Jon Danniken scrit:

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But, he could have set up that router as a repeater.


Re: Use a wireless router as a repeater for a laptop?
On 12/17/2013 11:06 AM, Harold W. wrote:
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A repeater for the far AP though, even though the laptop is on a
different subnet, not a repeater for the laptop.

Jon


Re: Use a wireless router as a repeater for a laptop?
On Tue, 17 Dec 2013 15:20:45 -0800, Jon Danniken

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WiFi repeaters are bidirectional (so when just two devices are involved it's
hard to say it's for the far AP) and operate at OSI Layer 2, so both sides
of the repeater are on the same subnet. No?


Re: Use a wireless router as a repeater for a laptop?
On 12/17/2013 07:08 PM, Char Jackson wrote:
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Hi Char.  I can configure my "middle" router (with DD-WRT) as either a
client bridge (clients have the same subnet as the "far" AP) or as a
repeater* (clients have a different subnet as the "far" AP).

In this example, the "far" AP is the AP which is too far for my laptop
to connect to, necessitating the use of the "middle" router in either
bridge or repeater mode (ie, I'm using "far" in relation to the laptop).

(WAN)----(far AP) ^     --z--      ^(middle router) ^      --z--
^(laptop)

*this being an atheros-based router, it is called "client" mode in DD-WRT.

Jon


Re: Use a wireless router as a repeater for a laptop?
On Tue, 17 Dec 2013 20:42:52 -0800, Jon Danniken

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A repeater uses wireless in both directions - first, to receive some traffic
from the far AP, then to transmit those packets to the local PC. Since the
same channel is used for both actions, throughput is cut in half. (Actually
worse than that, but whatever.) This happens at Layer 2, meaning both ends
are on the same subnet when using a repeater.

dd-wrt's client mode and client bridge mode both bridge a wireless signal to
a wired signal, if I remember correctly. So neither of those modes acts as a
repeater.

The primary difference between client bridge and client modes is that client
bridge connects the radio directly to the switch while client mode inserts
the router section between the radio and the switch. Client bridge means
both distant ends are on the same subnet while client mode (because of the
presence of the router section in the path) means the two distant ends are
on different subnets.


Re: Use a wireless router as a repeater for a laptop?
On 12/17/2013 10:21 PM, Char Jackson wrote:
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Gotcha; the reason I was calling it a repeater is due to using the
wireless VLan to connect the laptop to the "middle" router without a
cable.   I had seen this referred to as a repeater mode, although it is
accomplished by using Client mode in DD-WRT.

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Thanks!

Jon


Re: Use a wireless router as a repeater for a laptop?

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HUH ???

Just tell us, in plain words, what the problem/challenge is -
and then maybe we can answer your questions...



Re: Use a wireless router as a repeater for a laptop?
On 11/30/2013 08:02 PM, ps56k wrote:
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Sorry if I wasn't clear, I don't have a firm grasp on the all of the
lingo.  I want to configure a middle router such that it functions
essentially as an extension of the wireless adaptor in my laptop.  Once
configured in this way, I would join whatever network I wanted through
the standard interface on the laptop instead of first configuring the
middle router to join the network.

Unfortunately, I do not think this is actually possible now that I have
poked around a bit.

Jon


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