** Edited this to simplify it.
I recently deployed a sketchy 802.11b/g wifi network using some equipment a customer had purchased. (2 Apple Airport Expresses in wireless distribution mode) There was a lot of obstruction over a large distance and it would basically not work in the target area, although there was a faint signal. The distance is about ~120ft, through several rooms and out into the garage. I recently went back to iron it out.
I installed a 200mw USB adapter (Atheros AR5005) with a +8db gain omni antenna on the client computer. The increased signal strength was dramatic; however, I was still unable to fully connect. The wireless itself would establish a connection, but there was no communication with the router, as evident by the inability to lease a DHCP address, access web admin or surf the net. The wireless network works fine if we move the computer closer to the last airport (I can verify the last airport in the WDS chain has connectivity).
Despite getting a great link, it seems like the router and the client computer are not communicating at the distance my client wants. The network is detectable by the 'regular' wireless card, but it is hovering around 0-1 bars and stays pretty much unconnectable. With the new USB adapter and antenna, it is 3-4 bars and connects with little issue.
I also tried a 500mw USB wireless adapter with a +8db antenna with simliar results (RTL8187 chip).
So, the question is, why doesn't a high powered wifi card and big antenna work? Does it just improve receive but not send transmissions? If so, what's the point of higher gain antennas/devices and how do I solve it... would a bigger antenna on the router be the solution?
Here's a VERY rough diagram of the layout.
I recently deployed a sketchy 802.11b/g wifi network using some equipment a customer had purchased. (2 Apple Airport Expresses in wireless distribution mode) There was a lot of obstruction over a large distance and it would basically not work in the target area, although there was a faint signal. The distance is about ~120ft, through several rooms and out into the garage. I recently went back to iron it out.
I installed a 200mw USB adapter (Atheros AR5005) with a +8db gain omni antenna on the client computer. The increased signal strength was dramatic; however, I was still unable to fully connect. The wireless itself would establish a connection, but there was no communication with the router, as evident by the inability to lease a DHCP address, access web admin or surf the net. The wireless network works fine if we move the computer closer to the last airport (I can verify the last airport in the WDS chain has connectivity).
Despite getting a great link, it seems like the router and the client computer are not communicating at the distance my client wants. The network is detectable by the 'regular' wireless card, but it is hovering around 0-1 bars and stays pretty much unconnectable. With the new USB adapter and antenna, it is 3-4 bars and connects with little issue.
I also tried a 500mw USB wireless adapter with a +8db antenna with simliar results (RTL8187 chip).
So, the question is, why doesn't a high powered wifi card and big antenna work? Does it just improve receive but not send transmissions? If so, what's the point of higher gain antennas/devices and how do I solve it... would a bigger antenna on the router be the solution?
Here's a VERY rough diagram of the layout.
Code:
=========================================
||MODEM||###||###||#####||####||####||###||
||##{AP}|###||###{AP}###||####||####|####|| ==========
||#####||###||###||#####||####||####||###|| |GARAGE
||#####||###||###||#####||####||####||###|| |CLIENT
========================================= |
*The last three rooms are off limits as they are another person's apartment.