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Bugzilla – Full Text Bug Listing |
| Summary: | 802.11ac selects wrong slot duration | ||
|---|---|---|---|
| Product: | ns-3 | Reporter: | ad lee <adonislixi> |
| Component: | wifi | Assignee: | sebastien.deronne |
| Status: | RESOLVED FIXED | ||
| Severity: | major | CC: | ns-bugs, tomh |
| Priority: | P5 | ||
| Version: | ns-3.25 | ||
| Hardware: | All | ||
| OS: | All | ||
| Attachments: |
log, when NS_LOG=regularWifiMac=level_all. see line 182, slotset to 20000 back
patch to fix patch to fix |
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If I understand well the description, 802.11ac selects a slot of 20 microseconds iso 9 microseconds at the moment it gets associated? There is indeed an issue with 802.11ac and slot time selection when associating to an AP. Created attachment 2459 [details]
patch to fix
m_erpSupported was badly set for 802.11ac.
Attached patch fixes the issue.
Created attachment 2460 [details]
patch to fix
I works, fix my problem . thx very much Thanks for your feedback. I suggest to deliver the fix. (In reply to sebastien.deronne from comment #6) > Thanks for your feedback. > I suggest to deliver the fix. Agreed. fixed in changeset 12152:0ca48e3ff8e7 |
Created attachment 2458 [details] log, when NS_LOG=regularWifiMac=level_all. see line 182, slotset to 20000 back when wifi.Install, the vht wifi's slot will be seted 9us. but when sta associate with ap, ap consider sta as a none-erpSation(sta is a OfdmStation) , so ap wiil not set short slot, set ap-wifi-mac.cc line 759: m_stationManager->AddSupportedErpSlotTime (from, capabilities.IsShortSlotTime () && isErpStation); then when ap Send Assoc Resp, sta recv it, and set slot 20us back~ It will lead to back off time wrong! e g .