Roaming

• Media Access Control

  • CSMA/CA

• Beacon Frames

  • are broadcast from access point at regular intervals
  • contain access-point information (e.g. Service Set Identifier (SSID), supported data rates and Radio Frequency Methods (FHSS, DSSS), capacity)
  • client triggers „Roaming Event“ (max. retries) ? starting scanning process for available access points
  • new association to AP-B based on criteria such
    • Signal strength 20% better?
    • Fewer hops to backbone?
    • Count of associations (AP-B) + 4 < count of associations (AP-A)?

AP-B

AP-A

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