From ef24207f1e808947454735ede3873928f6a8c30a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?S=C3=A9bastien=20Deronne?= Date: Wed, 27 Dec 2023 11:45:18 +0100 Subject: [PATCH] wifi: Extend documentation about current MU-MIMO PHY support --- src/wifi/doc/source/wifi-design.rst | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/src/wifi/doc/source/wifi-design.rst b/src/wifi/doc/source/wifi-design.rst index 07c5a6e8a..be43a2f02 100644 --- a/src/wifi/doc/source/wifi-design.rst +++ b/src/wifi/doc/source/wifi-design.rst @@ -773,6 +773,25 @@ which would be ignored otherwise. This is illustrated in Figure :ref:`fig-cca-ch Illustration of signals tracking upon channel switching +MU-MIMO PHY support +################### + +There is a basic support for MU-MIMO at the PHY layer that has been introduced in release +ns-3.40. The current model can be used for both downlink and uplink MU-MIMO transmissions. + +The use of OFDMA and MU-MIMO for Multi-User transmissions depends on how the TXVECTOR +is filled in by the MAC layer (not implemented yet). Since mixed OFDMA and MU-MIMO +configurations are not supported, the TXVECTOR determines it carries information for +MU-MIMO if all users are assigned the same RU, otherwise it corresponds to an OFDMA +transmission. + +At the PHY layer, OFDMA and MU-MIMO transmissions are handled in a similar way, the main difference +lies in MU-MIMO having the same spectrum shared simultaneously with multiple transmitters (for +the uplink direction). The current PHY abstraction model assumes perfect conditions where the +interference helper is able to detect signals belonging to the same MU-MIMO transmission and make +sure they do not interfere with each others. Interference with other signals, including other +MU-MIMO transmissions, is still supported by the model. + The MAC model =============