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wifi: Update documentation

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Stefano Avallone
2022-08-15 23:54:12 +02:00
committed by Stefano Avallone
parent 41c506e07d
commit 9da9a8561d
3 changed files with 10 additions and 0 deletions
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1
CHANGES.md
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@@ -37,6 +37,7 @@ Changes from ns-3.36 to ns-3.37
* Adds support for **LrWpanMac** active and passive scan.
* Add supporting association structures: parameters, callbacks and the pending transaction list to **LrWpanMac**.
* The **TxopTrace** trace source of wifi `QosTxop` now has an additional argument (the third one) indicating the ID of the link the TXOP refers to (for non-MLDs, this value is zero).
* The maximum allowed channel width (in MHz) for a data transmission is passed to the **GetDataTxVector** method of the `WifiRemoteStationManager`.
### Changes to build system

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RELEASE_NOTES.md
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@@ -21,6 +21,7 @@ Release 3-dev
- (internet) !996 - IPv6 Router Solicitations (RS) are now retransmitted up to 4 times, following RFC 5779.
- (lr-wpan) !997 - Adds MAC ACTIVE and PASSIVE scan support
- (wifi) CCA has been reworked to report the channel type in the CCA-BUSY indication and the per-20 MHz CCA bitmap for 802.11ax.
- (wifi) PPDUs are transmitted on the largest primary channel that is found to be idle (according to the CCA-BUSY indication provided by the PHY) when gaining a TXOP.
### Bugs fixed

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src/wifi/doc/source/wifi-design.rst
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@@ -838,6 +838,14 @@ a result, the backoff timer has a zero value, the EDCAF cannot immediately
transmit, but it has to wait for another slotTime of idle medium before transmission
can start.
When the Channel Access Manager determines that channel access can be granted, it
determines the largest primary channel that is considered idle based on the CCA-BUSY
indication provided by the PHY. Such an information is passed to the Frame Exchange
Manager, which in turn informs the Multi-User Scheduler (if any) and the Wifi Remote
Station Manager. As a result, PPDUs are transmitted on the largest idle primary channel.
For example, if a STA is operating on a 40 MHz channel and the secondary20 channel
is indicated to be busy, transmissions will occur on the primary20 channel.
The higher-level MAC functions are implemented in a set of other C++ classes and
deal with: