Which description of the ideal VoWLAN design is true?

The correct answer is C. smaller cells with higher data rates enabled and admission control enabled through WMM. The ideal VoWLAN design uses smaller cells (to ensure strong RSSI of at least -67 dBm throughout), higher data rates enabled (to force clients to use efficient modulation, maximizing airtime availability for more simultaneous voice calls), and WMM admission control (C). WMM…

WLAN Design

Question

Options

Asmaller cells with all data rates enabled to ensure that all clients can associate
Blarger cells with higher data rates enabled and WPA2 to secure voice conversations
Csmaller cells with higher data rates enabled and admission control enabled through WMM
Dsmaller cells with higher data rates enabled and no overlap to prevent co-channel interference

How the community answered

(25 responses)

A
4% (1)
B
8% (2)
C
88% (22)

Explanation

The ideal VoWLAN design uses smaller cells (to ensure strong RSSI of at least -67 dBm throughout), higher data rates enabled (to force clients to use efficient modulation, maximizing airtime availability for more simultaneous voice calls), and WMM admission control (C). WMM (Wi-Fi Multimedia) admission control is critical because it prevents an AP from accepting more voice calls than it can support, protecting existing call quality. All data rates enabled (A) causes clients at the cell edge to use slow rates, consuming excessive airtime. Larger cells (B) result in weaker signals unsuitable for voice. Eliminating all overlap (D) creates coverage holes and is impractical since VoWLAN requires 15–20% cell overlap for seamless roaming handoffs.

Topics

#VoWLAN#WMM admission control#cell sizing#data rates

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