stds-802-16: TG 1 COMMENT

["Hoon Choi" <hchoi@antd.nist.gov>]

[Submitter's Last Name] 
Choi

[Submitter's First Name]
Hoon

[Membership Status: (M)ember; (O)bserver; (N)either]
O

[Starting Page #]
110

[Starting Line #]
51

[(T)echnical for Content-Related Material; (E)ditorial for typos, 
grammar, etc., (TBD) for a comment on a section marked "TBD"]
T

[Detailed Description of Proposed Insertion, Deletion, Change]
It is written as "transmission timings are linked via the Upstream TimeStamp
within the DS-MAP and the US-MAP messages." But no messages such as DS-MAP
or US-MAP message have been defined in the draft. 
Instead of adding DS-MAP and US-MAP messages, we can use already defined 
messages with similar function. Downstream and upstream information can be 
transmitted to CPEs periodically via Downstream Channel Descriptor message 
and Upstream Channel Descriptor message, respectively.  
Considering these messages don't have "Upstream TimeStamp" but have
other timeing information, new text can be 
"transmission timings are linked via the timing information
within the Downstream Channel Descriptor and the Upstream Channel Descriptor
messages."  

[Reason for Edit]
To correct use of undefined messages in draft #1

=========

[Submitter's Last Name] 
Choi

[Submitter's First Name]
Hoon

[Membership Status: (M)ember; (O)bserver; (N)either]
O

[Starting Page #]
121

[Starting Line #]
26

[(T)echnical for Content-Related Material; (E)ditorial for typos, 
grammar, etc., (TBD) for a comment on a section marked "TBD"]
T

[Detailed Description of Proposed Insertion, Deletion, Change]
It is written as "The BS may allow collisions on either Requests or Data
PDUs". 
Based on the current media access control of the draft, 
the Data PDUs are always transmitted via data slot without collision
once they are granted a bandwidth for data. 
Therefore the new text should be 
"The BS may allow collisions on Requests PDUs only."   

[Reason for Edit]
To delete a misleading description in draft #1