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Re: [802.3_NGBASET] 802.3bz proposed drawing 126=25 (responding to comments i-6, i-7, and i-8 )



Please think about this resolution tonight.

PROPOSED ACCEPT IN PRINCIPLE.

DEFER - text is broken in clause 55 and others.

 

Comment i-6:

Change "Shall implement the CRC16 polynomial (x+1)(x15+x+1) of the previous 10 octets," to "This field shall contain CRC16 value calculated using the polynomial (x+1)(x15+x+1) over the previous 10 octets,"

 

Comment i-7:

Change Figure 126-25 to show a switch at the arrow by "CRCgen" and "CRCout" with the two settings of the switch indicated, and logic 0 input at the CRCout setting. (see below)

 

Change "with the switch connected, which is setting CRCgen" to "with the switch set to CRCgen".

 

Change "the switch is disconnected (setting CRCout)" to "the switch set to CRCout"

 

Final text:

CRC16 (2 octets). This field shall contain CRC16 value calculated using the polynomial (x+1)(x15+x+1) over the previous 10 octets, Oct5<7:0>, Oct6<7:0>, Oct7<7:0>, Oct8<7:0>, Oct9<7:0>, Oct10<7:0>, Oct11<7:0>, Oct12<7:0>, Oct13<7:0>, and Oct14<7:0>. The CRC16 shall produce the same result as the implementation shown in Figure 126-25. In Figure 126-25 the 16 delay elements S0,..., S15, shall be initialized to zero. Afterwards Oct5 through Oct14 are used to compute the CRC16 with the switch set to CRCgen in Figure 126–27. After all the 10 octets have been processed, the switch is set to CRCout and the 16 values stored in the delay elements are transmitted in the order illustrated, first S15, followed by S14, and so on, until the final value S0.

 

George A. Zimmerman, Ph.D.

President & Principal Consultant

CME Consulting, Inc.

Experts in PHYsical Layer Communications

1-310-920-3860

george@xxxxxxxxxxxxxxxxxxxx

 

From: Alon Regev [mailto:aregev@xxxxxxxxxxx]
Sent: Wednesday, May 25, 2016 4:57 PM
To: George Zimmerman <george@xxxxxxxxxxxxxxxxxxxx>
Subject: 802.3bz proposed drawing 126=25 (responding to comments i-6, i-7, and i-8 )

 

Here is my proposed drawing:

 

 

Attachment: image003.emz
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