RE: [802.21] Start ACK requestor and responder state machines
The setting of the MIH ACK bit should depend more on the type of
end-to-end transport protocol that you are using to communicate the two
MIH peers, than on the actual RF signal levels.
The following Internet-Draft (soon to become RFC) has some discussion
and recommendations on the topic:
I hope this helps.
From: Ruben Gonzalez [mailto:ruben.gonzalez@ENTEL.UPC.EDU]
Sent: Thursday, 19 March, 2009 2:56 PM
Subject: [802.21] Start ACK requestor and responder state machines
I am working on a master thesis about a wifi to wifi 802.21 handover
implementation and I was thinking about how to determine the AckReq and
AckRsp bits in in a MIH_MESSAGE header. I'm using Atheros wireless cards
which main parameter of quality is the RSSI. It is quite well
how to determine the signal level thresholds to proceed handover
(madwifi-project.org), but I am not being able to guess when should I
start to improve the channel's fiability by switching in the ACK
I have determined the following signal level thresholds, and the actions
to be taken:
Roaming threshold: -73dBm
- L2 Connection
Clear channel threshold: -89dBm
- L3 Handover
Link_Down threshold: -94dBm
Could anybody give me a clue about when to set AckReq and AckRsp bits?
I on the rigth way looking at this indicator (signal level)?
Thanks in advance.