Extending Wireless Network…
• Each roaming station must be associated with a single
AP. This can be done:
– Via active scanning,
• The node sends a Probe frame
• All APs within the reach reply with a Probe Response
• The node select one AP and sends that AP an Association Request
• The AP replies with an Association Response frame
– In response to a beacon frame issued by the APs
• The APs broadcasts a beacon frame 10 to 100 times per second,
providing systems parameters, and giving opportunities to the
stations to sign up.
• The AP creates an association for this node and informs
other APs, only then can this node start sending and
receiving data
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