[Ns-developers] Wifi management frames

[Mirko Banchi]

Hi all,

i have some questions about 802.11 management frames i'd like to discuss
with you.

For now all management frames are handled in NqstaWifiMac, NqapWifiMac,
AdhocWifiMac, QapWifiMac, QstaWifiMac objects. This type of frames are
stored in the same queues where are stored data frames.

-First question:

Should be there a specific queue for management frames ?
What will happen if a station becomes disassociated (so a probeReq or a
associationReq are needed) and have other packets in queue?

See:

src/devices/wifi/nqsta-wifi-mac.cc
   NqstaWifiMac::Enqueue
   NstaWifiMac::TryToEnsureAssociated
   NqstaWifiMac::SendProbeRequest

-Second question:

Working with block ack there is need to send action frames (management
frames) in order to setup block ack. I think that the exchange of this
frames between two station must be accomplished with high priority. I
used a method

WifiMacQueue::PushFront (Ptr<Packet> packet, const WifiMacHeader &hdr)

that pushes packets in queue's head but it's very horrible: the
expiration of MsduLifeTime doesn't work :(

I think that a dedicated queue (like m_beaconDca in NqapWifiMac) could
resolve this problems.

Regards,
Mirko

-- 
Mirko Banchi

e-mail:    mk.banchi at gmail.com
e-mail:    mk.banchi at virgilio.it
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