Wireless Topologies

Ad-Hoc Mode

BSS - Basic Service Set

IBSS - Independent Basic Service Set

AP - Access Point

BSA - Basic Service Area (Cell)

SSID - Service Set identifier

Distribution System - connectivity from AP

WLC - Wireless LAN Controller

ESS - Extended Service Set

Roaming

Lightweight AP , downloads Software and Config from controller

-67 dBm for voice and video 35% overlap, -70dBm for data 20% overlap

RTLS - Realtime location services

WiFi Asset Tags (RFID)

Finding

Geofencing

Foot Traffic

Historical

RF Fingerprinting

UN Telecommunications regulatory body that regulates which part of the RF spectrum cna be used for a particular purpose.

2.4 to 2.5 GHz

5.725 to 5.825 GHz

US, allocated unlicensed national information infrastructure (U-NII) frequency for wireless LAN use

U-NII-1 (Band 1) 5.15 to 5.25 GHz

U-NII-2 (Band 2) 525 to 5.35 GHz

U-NII-2 Extended (Band 3) 5.47 to 5.725 GHz

U-NII-3 (Band 4) 5.725 to 5.825 GHz (ISM)

All transmitting equipment must be approved by FCC before it can be sold.

2.4GHz can be used indoors or outdoors

Power emitted at transmitter limited to 30dBm and teh EIRP limited to 36 dBm.

Point-to-multilpoint links - adjustments according to 1:1 rule, EIRP no greater then 36 dBm.

Point-to-point links - adjustments according to 3:1 rule, EIRP no greater then 56 dBm.

Europe and other countries. same bands except U-NII-3 cannot be used