On Tue, Mar 13, 2012 at 11:32 AM, Monthadar Al Jaberi
monthadar@gmail.com wrote:
I am looking at HWMP RANN, and there is something that is strange in
Draft P802.11-REVmb/D12 chapter 13.10.12.3 Case B Propagation.
There is a condition "-- The mesh STA sent its previous RANN
dot11MeshHWMPrannInterval TUs ago", but for propagation this condition
doesn't make a lot of sense to me.
I believe this condition is in place to avoid RANN storms. If for
whatever reason a node receives a large number of RANNs, this
condition ensures that the rate of transmitted RANNs does not exceed
(1024/dot11MeshHWMPrannInterval) RANNs per second.
The MIB definition provides a bit more detail:
"This attribute specifies the minimum interval of time (in TUs) during
which a mesh STA can send only one Action frame containing a RANN
element."
I looked into your code and found that you ignore it too when propagating.
It's not that important, but we probably should implement it.
On Tue, Mar 13, 2012 at 11:32 AM, Monthadar Al Jaberi monthadar@gmail.com wrote:
I believe this condition is in place to avoid RANN storms. If for whatever reason a node receives a large number of RANNs, this condition ensures that the rate of transmitted RANNs does not exceed (1024/dot11MeshHWMPrannInterval) RANNs per second.
The MIB definition provides a bit more detail:
"This attribute specifies the minimum interval of time (in TUs) during which a mesh STA can send only one Action frame containing a RANN element."
It's not that important, but we probably should implement it.