[STDS-802-16] OFDM-256 DL-MAP IE
I have an issue with the wording in IEEE 802.16REVd/D5--2004,
specifically OFDM-256 DL-MAPs.
Page 463, Lines 50-56:
Start Time
Indicates the start time, in units of symbol duration, relative to the
start of the first symbol of the
PHY PDU (including preamble) where the DL-MAP message is transmitted.
The end of the last
allocated burst is indicated by allocating a an End of Map burst (DIUC =
14) with zero duration.
The time instants indicated by the Start Time values are the
transmission times of the first symbol
of the burst including preamble (if present).
The DL-MAP IE does not have a duration, so what is the End of Map burst
to contain?
I think it ought to contain a Start Time that is one symbol beyond the
last symbol of the last allocation (and thus defining the duration of
the last allocation), but there are other ways of defining this (until
end of frame for FDD, and until TTG prior to the first UL-MAP allocation
in TDD systems).
Comments please.
Regards
David
Dr David Castelow Airspan Communications Ltd
Principal Systems Engineer Cambridge House, Oxford Road
DSP & Systems Design Uxbridge UB8 1UN, UK
http://www.airspan.com +44 1895 467281