On Tuesday, October 14, 2003, at 6:07 PM, Bob O'Hara wrote:
An AP (or station in an IBSS) is supposed to include the channel on
which the Beacon is transmitted in the DS parameter set, according to
the standard. The whole purpose for the information element is to
remove the ambiguity about which channel the transmitter is using,
exactly because the Beacon can be received on more than one channel
surrounding the channel on which it is sent. So in your example, the
Beacon sent on channel 6 must indicate channel 6 in the DS Parameter Set
information element.
-Bob
-----Original Message----- From: Puneet B [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 14, 2003 5:08 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; [EMAIL PROTECTED]; Bob O'Hara Subject: Re: [BAWUG] beacon frames and channels
Beacons contain the channel ID in the beacon frame.
right: in the DS Parameter Set. Thanks for pointing that
out.
STAs 'know' what channel they are 'on', and can discard
beacons from adjacent channels.
So the STA picks the frequency based on the channel number
it sees in the beacon and not the frequency at which the
beacon was received? And the beacon is not required to
maintain the mapping of channel-number to frequency when
it is sent out? I mean a beacon sent at 2.437Ghz can have
a channel number of 11 inside it (instead of 6)?
Thanks,
Puneet
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