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Hi, Colleagues, I have some questions when I am trying to
implement the 802.16e Section 8.4: 1. In 802.16-2004 (and 16e) Section 8.4,
the concepts of symbol, subcarrier, subchannel, carrier-set, bin, tile, slot,
data region, burst, segment, permutation zone, frame, multiframe are used. It
seems that some of them are not well defined/described, and the number of them
is far more than other standards such as IS-2000, UMTS, IS-136 and GSM used. Is
it possible to make this number smaller? 2. Question about Segment: (2.1) Segment is vaguely defined
in 8.4.3.2. According to 8.4.3.2, the justification of using this concept seems
to be that it is used to deploy a single instance of MAC. Is this concept used
in the MAC layer? If yes, its relation to the MAC layer should be clearly
described. If not, then the concept might be merged into other concepts such as
subchannel, data region, burst, et al. (2.2) The concept of
Segment is used in 8.4.6.1.1 for Preamble. Preamble is purely a PHY layer
concept and has nothing to do with MAC layer. This seems to contradict against the
definition of Segment in 8.4.3.2. (2.3) The concept of
Segment is used in 8.4.4.4 for FCH subchannel allocation. If the concept of
subchannel is used here, why is it needed to use Segment? (2.4) The word Segment is
used again in 8.4.3.4 for totally different meaning. 3. It seems that the concepts of bin and
tile are used but never defined. Thanks for your help in advance. Dr. Will Liew Andrew Corp. 434-386-5212
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