Unable to set 'AccessReqInterval' attribute for an UL OFDMA simulation

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Akshara V

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Aug 12, 2022, 1:35:41 PM8/12/22

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I am trying to run simulation with only uplink (UL) OFDMA transmissions (no downlink traffic). I have made modifications to wifi-he-network example to achieve this. My configuration setup is as follows:

1 Access Point (AP) and 2 stations
No traffic from AP to stations
UL UDP traffic configured at both stations
'rr-multi-user-scheduler' attached to AP
'EnableUlOfdma' attribute of scheduler is set to true

But I cannot observe any trigger frame or trigger-based frames transmission. Is there any other attribute I need to set to run simulation with only UL OFDMA and no DL traffic? Do I need to enable DL traffic and DL OFDMA to observe UL OFDMA transmissions?

I came across an attribute called 'AccessReqInterval' in this page. It says that this attribute allows the AP to coordinate UL MU transmissions even without DL traffic. But I am unable to set it due to following error:

msg="Invalid attribute set (AccessReqInterval) on ns3::RrMultiUserScheduler"

I am using the latest version of ns3 - ns3.36.1. Is this attribute not yet supported?

Jakub Tutka

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Nov 12, 2022, 6:14:09 AM11/12/22

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Hi,

Did you solve this problem? I also want to study only UL OFDMA, but i have the same issue.