Ad Hoc Mode allows multiple PSP® (PlayStation® Portable) systems to
communicate with each other within a limited range. For example, if you want
to play a game against someone else with a PSP® in the same room, use the
Wireless (WLAN) network Ad Hoc Mode. For set up instructions, see
Setting up Ad Hoc Mode.
If you are having problems setting up or running a WLAN in Ad Hoc Mode:
Make sure the WLAN switch on the left side of the PSP® is turned
on.
If you are unable to play an online game in Ad Hoc Mode, make sure
there are two or more PSP® systems with the same game located in
the general vicinity.
Make sure that all of the PSP® systems are using the automatic
default settings or set to the same channel for communication.
Make sure you don't have any active devices located nearby that might
interfere with a wireless signal, such as:
2.4 gigahertz cordless phones
Bluetooth wireless devices
Microwave ovens
Fluorescent lighting
High powered audio equipment
TV sets or computer monitors
Electronic insect "zappers"
Any other electronic equipment that may produce Radio Frequency
(RF) interference