This kind of setup is called 'ad hoc.' Bluetooth adapters connect from one adapter to another, though this typically serves to 'pair' the devices for a specific purpose, such as sharing a file or connecting a wireless earpiece to a phone. Wireless adapters can also be set up to act as wireless access points. Wireless access points receive a signal from a wireless adapter requesting a connection. The most common way to accomplish this is through a wireless access point.
Wireless adapter must connect to another wireless device through a signal.
