[Fwd: delay in adhoc mode]

[Jay Zhang]

Thanks for all those helpful responses, I really appreciate it very much.
The pseudo ad-hoc mode (Pseudo-IBSS mode, PIM) looks very promising.

Based on some on-line search I have done, my understandings are listed 
in the following, please feel free to correct me if anything is not right:

1. The BSSID will be all zeros.
2. There is no distributed beaconing mechanism
3. As long as the cards on the same channel and within the radio range,
  all the cards can hear each other. There is no separate cells at the
  link layer.
4. A card in PIM will not send out any management frames (Probe
  request/response, beacon, authentication, deauthentication, ATIM,
  association request/response, reassociation request/response,
  disassociation)

5. A card in PIM will still send ACK for received management frames 
(not sure).
The further question is: what is the impact on the nearby 802.11 IBSS
  communication?

6. Are the Control frames the same as those in 802.11?

7. How do the two cards in PIM set up the communication? Because these 
is no beacon, how does the sender find out the destination MAC address?
  Does it mean that most of the messages are broadcasted to the current
  channel and the IP layer decide whether it should "receive" the data?

8.How does a card know if there is other card around, and what is the 
collision avoid mechanism?  Is it the same as other mode (802.11 way)?

9.As there is no management frame any more, how does a card know some
basic physical layer stuffs such as the rate?

I guess Intersil may have more info about PIM in their "driver 
developer's manual". But it seems that they do not response to manual
requests anymore. :(

Thanks.