Airport WiFi connection drops | TP-Link TL-WR340GD

Hello,

I have a problem with my white Macbook in combination with the TP-Link TL-WR340GD router.

The issue is; when the router is started (or restarted) my WiFi connection works fine for roughly 8 - 15 hours, afterwords it seems like I am still connected to the router, however Internet access is not longer possible (even though I have 4 bars in the Airport icon). I am then also not able to access the webinterface (192.168.1.1) of the router (after a restart of the router this is easily possible). When I switch Airport on/off, I will have Internet connection again for about 10 minutes, then it drops again.

What I did so far (but what did not solve the issue):

- Factory reset of the router

- Update to the newest firmware of the router

- Software Update on my mac (goes without saying..)

- Complete reinstall of my macbook

- Deletion of Airport preferences

I am really puzzled right now, because it also the case that the other laptops in the network are not affected by this problem at all. I tested it with a windows laptop and directly after accessing the router from my macbook was no longer possible, I could still open the interface from the windows machine. What is even more confusing is that I experience exactly the same problem with my iPhone 3Gs (4.3.1).

Following some details about my Airport extreme card and the network:

Airport:

Card Type: AirPort Extreme (0x14E4, 0x93)

Firmware Version: Broadcom BCM43xx 1.0 (5.10.131.36.9)

Locale: ETSI

Country Code: KR

Supported PHY Modes: 802.11 a/b/g/n

Router:

TL-WR340GD, running newest firmware

WPA 2 encryption

fixed IP (but also tried with dynamic)

It would be really awesome if anyone could help me with this!

Thanks a lot,

Marius (Voxius)