Wireless LAN Topologies

• WPAN
  • Bluetooth, ZigBee
  • IEEE802.15
  • 2.4GHz band
• WLAN
  • IEEE802.11
  • 2.4-5GHz
  • IEEE802.11z (Wi-Fi Direct/NAN, p2p communication)
• WMAN
  • WiMAX
  • IEEE802.16
  • Licensed frequencies
• WWAN
  • Mobile Phone
  • Telecommunications Carriers
  • Licensed Frequencies

• Basic Service Set
  • A closed group of mobile devices
  • BSSID = unique AP’s own radio MAC address
    • frame source/destination address
  • SSID = wireless services
  • Association: membership in BSS
  • AP as traffic relay

• Distribution System
  • AP is translator (Vlan <> SSID)
  • AP trunk to DS
  • if in one AP, unique BSSID for each SSID and all SSID using same tx, rx, antennas, channel

• Entended Service Set, ESS
  • Better all ap provide same SSID
  • Roaming = passing from one ap to another

• Independent Basic Service Set
  • 不經AP, P2P

• Repeater

• Workgroup Bridge (Wireless Lan Card)
• Outdoor Bridge

• Mesh Network