my ps3 using a wireless router

How to connect my ps3 using a wireless router without a cable modem? i have my ps3 downstairs in my theatre room, and my computer is upstairs, i have a cable modem, and i have wifi but the ps3 connects and will then disconnect moments after... i want to buy a wireless router to put downstairs. is it possible to not connect the wireless router using the cable modem or computer because i can't have cables running all the way from upstairs to downstairs.

[Cerberus]

you need to purchase the wireless network adaptor for the ps3. ( its an accessory ) NOT a wireless router.

[WildRushSykes]

Wait i thought all ps3s had wireless inbuilt? Well mine does........

[Cerberus]

nope not all do, some just came with a RJ45 connector

[WildRushSykes]

:O Thats a bit crappy of Sony

[Cerberus]

not really, i wouldnt wanna play online games over wireless anyways lolol plus its only wireless G @ 54mbits/s and apposed to 100mbits/s wired

[NX3]

You could get Homeplug if you don't want to run a cable and wifi is problematic. Get 200mpbs to make sure you've got enough bandwidth for streaming videos.