Re: [STDS-802-16] Clarification on the CRC in the MAC PDU
My understanding is that the LEN field includes the CRC.
Baraa Al-Dabagh
BWD
Intel Corporation
baraa.al.dabagh@intel.com
Phone: 408-545-6078
> -----Original Message-----
> From: owner-stds-802-16@listserv.ieee.org [mailto:owner-stds-802-
> 16@listserv.ieee.org] On Behalf Of Jonathan Labs
> Sent: Thursday, March 25, 2004 9:29 AM
> To: STDS-802-16@listserv.ieee.org
> Subject: [STDS-802-16] Clarification on the CRC in the MAC PDU
>
> Could someone please clarify an ambiguity I am seeing regarding the
MAC
> PDU
> and the CRC? When present, is the CRC considered part of the MAC PDU
or
> is
> it like and appendix?
>
> Here are the sections in P802.16-REVd/D3, that suggest on or the other
> interpretation:
> --Section 6.4.2, page 53, line 15, "A MAC PDU may contain a CRC, as
> described in 6.4.3.5.".
> --Page 54, Table 5, Row 1: CI Description: "1 = CRC is appended to the
> PDU."
> --Section 6.4.3.5 CRC calculation: "A service flow may require that a
CRC
> be
> appended to each MAC PDU carrying data for that service flow
(11.13.14).
> In
> this case, a CRC, as defined in IEEE 802.3, shall be included in each
MAC
> PDU..."
>
> The reason for differentiating is because the LEN field in the MAC
header
> (Table 5) is "The length in bytes of the MAC PDU including the MAC
> header."
>
> So I guess the real question is, does the LEN field include the length
of
> the CRC when present?
>
> Thanks for your help.
>
> Jon