[STDS-802-16] clarification needed on definition of min and max values for Allocation Start Time field.
- To: STDS-802-16@LISTSERV.IEEE.ORG
- Subject: [STDS-802-16] clarification needed on definition of min and max values for Allocation Start Time field.
- From: gundlapalli giridhar <girigold@YAHOO.COM>
- Date: Wed, 4 May 2005 06:31:40 -0700
- Comments: DomainKeys? See http://antispam.yahoo.com/domainkeys
- DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; b=U9EDl1mgBCYXVqydm9qNptDj+rWNDEtIdTYFEbGzdPcVJRRHWcFeSkvPkSiklhWyMuKl4i2F0hP27ur/7q+/1L9FzADAKvGL9xOcTb8GUC9nx4VrdPz0Qc0QmgferElMvS98U0P4/8pzfPkTt/By0sWM4Z37Krhmt2SgDfp8HTs= ;
- Reply-To: gundlapalli giridhar <girigold@YAHOO.COM>
- Sender: owner-stds-802-16@LISTSERV.IEEE.ORG
Hi,
Please go through the following lines and
correct me if my understanding is wrong.
The following sub-section of the std defines the
allocation start time field min and max values:
6.3.7.5.2 WirelessMAN-SCa PHY
TDD, the Allocation Start Time value shall be to the
following limitations:
— Minimum value: Allocation Start Time > Tf
— Maximum value: Allocation Start Time < 2 X Tf
where, Tf is the beginning of the next frame.
----------------
My understanding:
The Allocation Start Time is related to the UL
sub-frame in TDD operation. The definition of its
value should be w.r.to the start of UL sub-frame in
the current (minimum time relevance) or next frame
(maximum time relevance).
Hence the min and max values are to be:
Minimum time relevance:
— Minimum value: Allocation Start Time >= FCH offset
(UL-MAP may commence immediately after the FCH when
there is downlink data i.e. data DL-MAP IEs)
— Maximum value: Allocation Start Time <
frame_duration
Maximum time relevance:
— Minimum value: Allocation Start Time >=
frame_duration (UL-MAP starts in the next frame)
— Maximum value: Allocation Start Time < (2 X
frame_duration)
The point is the UL-MAP has to end in the frame in
which its allocation starts, i.e.
- in miminum time relevance case, the start and end
happens in the current frame and
- in maximum time relevance case, the start and end
happens in the next frame.
The pictorial representation in earlier version of
standard was to this extent.
Thanks for your time,
-Giridhar.
__________________________________________________
Do You Yahoo!?
Tired of spam? Yahoo! Mail has the best spam protection around
http://mail.yahoo.com