[STDS-802-16] Unicast Polling 802.16d/D5 question

["Putzolu, David" <david.putzolu@INTEL.COM>]

I am reading the 802.16d/D5 spec & have found
text in the unicast polling section which is a
bit surprising.

Section 6.3.6.3.1, which describes BS use of unicast
polling to query individual SS for bandwidth requests,
states, "If the SS does not need bandwidth, the
allocation is padded in accordance with 6.3.3.7"

Section 6.3.3.7 describes how padding is done for
"allocated space within a data burst that is unused."

Reading these two sections gives the impression that
if a SS receives a grant allocation and has nothing
to transmit, it must transmit padding anyway.

Is this reading of 6.3.6.3.1 correct? Is there some
other part of the spec that clarifies this?

Thanks,
David