HWMP PREQ problem/bug?

[Carlos Viegas]

Dear all,

I'm simulating a mesh network on NS-3.13.

However, I notice a weird behavior regarding the PREQ frames.

According to IEEE 802.11s amendment  (final, 10th sept 2011): to use HWMP in PROACTIVE mode, a root must be set and send PREQ frames to the STAs (11C.9.4). To use HWMP in REACTIVE mode, a root is not mandatory, but a mesh STA should send PREQ frames in broadcast (11C.9.3).

But in NS-3 I notice that the opposite occurs. Based on mesh.cc example, when I set a root (i.e. proactive mode), the PREQ frames are sent in broadcast (not directly to the STAs). If I do not set root or set it as broadcast (reactive), it sends PREQ frames to the specified destination.

If I'm right, the NS-3 runs in REACTIVE mode when it is supposed to run in PROACTIVE mode.

Does anybody have noticed this behavior? Or I'm leading to a misunderstanding?

Regards,

Eng.º Carlos Viegas

Engenheiro de Pesquisa e Desenvolvimento
Faculdade de Engenharia da Universidade do Porto