Dispatch radios on the city’s voice SSID still lose contention during busy shift changes even though WMM is enabled. Protocol analysis shows the voice access category waiting as long as best-effort because AIFSN values were mis-set. What should be corrected?
Select an answer to reveal the explanation.
Short Explanation
WMM is only as good as the starting-line gaps. If voice’s AIFSN looks like best-effort’s, the VIP lane isn’t a VIP lane anymore. Put AC_VO back on the short AIFSN/CW settings so dispatch traffic actually wins the medium.
Full Explanation
EDCA prioritizes access categories primarily through AIFSN and contention-window settings: AC_VO should arbitrate with a lower AIFSN and tighter CW than AC_BE/AC_BK. Misconfigured AIFSN erases that advantage even when WMM is nominally enabled. Disabling EDCA or demoting voice to AC_BK worsens real-time performance; extreme beacon intervals are unrelated to per-queue arbitration fairness.