General

• Reduce the power level on the AP to half the expected client max. power value. Turn off Dynamic Transmit Power Control (DTPC) for the survey.
• Use the antenna intended for the final deployment.
• Set the AP mode to Diversty, both on the 2.4-GHz and the 5-GHz bands if you use omnidirectional antennas.

Data

• If no legacy 802.11 clients are expected, turn 1-Mbps and 2-Mbps data rates off. If no 802.11b clients, turn 802.11b rates off.
• Plan for a 10 to 15 % overlap between cells.
• Use 802.11a as much as possible, especially for high-density deployments.
• Use channels 1, 6, 11 (or 1, 5, 13 in ETSI domain).

Voice

• Disable all rates below 12 Mbps (11 Mbps for 802.11b). Set it as the only mandatory rate and all above rates as supported.
• Plan for 20 concurent calls in 802.11a, 15 calls in 802.11g and 7 – 8 calls in 802.11b.
• Enable Call Adminssion Control (CAC) to limit the bandwitdth allowed for voice to 75 % (6 of which are for roaming users).
• Plan for cell edges set to -65 dBm to 67 dBm RSSI and 25 dB SNR.
• Plan for 20 % overlap between cells.
• Keep a 19 dB separation between cells on the same channel.
• Use UNII-1 and UNII-3 bands, where radar is present.
• … using fewer channels is often better than risking sudden AP channel changes.
• Survey for tablets with the same cell specs as for VoWLAN cells, considering the bandwidth these devices need.

Location

• Each point where location is needed should be surrounded by at least 3 APs hearing that point signal at -75 dBM RSSI or better.
• AP separation = 12 to 21 m (40 to 70 feet)
• AP hight < 6 m (20 feet)

Combining Data, Voice and Location

• Survey for voice.
• Try to use 5 GHz bands for voice and 2,4 GHz band for data and location.
• Set the cell edge at -67 dBm for VoWLAN coverage and reduce the power level on the 2,4 GHz radio to cover the same physical arrea as with the 5 GHz radio.
• Add additional APs at the edge of the floor, in monitor mode.