Instructions
Turn on your Sony PS3.
Select the "Settings" option from the PS3's main menu.
Select the "Network Settings" option from the PS3's "Settings" menu.
Select "Internet Connection Settings." Select the "Easy" option, then the "Wireless" option, then the "Scan" option.
Highlight the listing for the wireless network that is being created by your wireless router. If you have put a password on your wireless router network, you'll have to enter that password using the PS3's controller. Once you've done that, select "Save Settings" to save all the changes you've made. You will now be able to get online with your PlayStation 3 via your wireless router network.