My PS3 keep cutting off my router connection?

This began few weeks ago, when I turn my PS3 on, for some reason my router's connection keep cutting itself off. When I realised it's my PS3, I searched for online solution, I have tried turning off UCnP, assigning my Laptop and PS3 their own individually IP address, it worked at one point. I also have tried turning off Media Sharing but the problem still persist.

And now, whenever I turn my PS3 it on, I have to go downstair and reboot it every time. I can't use wired since the router is in the living room and someone is always using the TV.

I am using router Huiwei HG533 and a extender NETGEAR NWN3000RP. The router is downstair whilst the extender is right next to my PS3 and my Laptop in my bedroom.

This problem is making me crazy, I'd appreciate it if anyone could spare their time and help out. Thank you.