Jump to content


An interesting question: Association phase in Ad-hoc?


  • Please log in to reply
3 replies to this topic

#1 axilimi

axilimi

    Member

  • Members
  • PipPip
  • 106 posts

Posted 05 September 2010 - 04:56 PM

Hi everybody,

Could you tell me why there is no association phase in Ad-hoc networks?

Thank you.
  • 0

#2 sirkozz

sirkozz

    Wireless Expert

  • Technical Experts
  • PipPipPip
  • 375 posts
  • Gender:Male
  • Location:always somewere in North America

Posted 08 September 2010 - 01:16 AM

There is no AP to control the association process. Only “probe request”/”probe response”/’beacon”/ATIM/authentication frames are used.
  • 0

#3 axilimi

axilimi

    Member

  • Members
  • PipPip
  • 106 posts

Posted 08 September 2010 - 01:55 AM

There is no AP to control the association process. Only “probe request”/”probe response”/’beacon”/ATIM/authentication frames are used.

What happens if there is no association phase?
Why does not a station in the ad-hoc network control the association process?

Edited by axilimi, 08 September 2010 - 02:06 AM.

  • 0

#4 sirkozz

sirkozz

    Wireless Expert

  • Technical Experts
  • PipPipPip
  • 375 posts
  • Gender:Male
  • Location:always somewere in North America

Posted 08 September 2010 - 03:12 AM

From the CWAP study guide freely available from the CWNP website:

With an IBSS, the first active Ad Hoc station establishes the RF channel
and starts sending beacons. Other Ad Hoc stations can join the network
after receiving a beacon and accepting the IBSS parameters (e.g., beacon
interval) found in the beacon frame. All stations that join the IBSS
participate in the sending of beacons. Each station schedules itself to
send a beacon a very short random delay interval after each Target
Beacon Transmission Time (TBTT). TBTTs are the exact points in time
that each access point has scheduled a beacon to be sent onto the wireless
medium. TBTTs are based on a zero reference time and spaced according
to the beacon interval. Each station that receives a beacon during its
delay cancels sending its beacon this time and schedules one for a new
random delay interval after the next TBTT.
  • 0





0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users